[From the U.S. Government Printing Office, www.gpo.gov]


                       DELAWARE RIVER BASIN COMMISSION





                                     SEASONAL

                                  DISINFECTION


                                          STUDY

                                                                   COASTAL ZONE

                                                               INFORMATION CENTER
                                           APRIL 1990

















                            DEIAWARE RIVER BASIN COMMISSION
                              Gerald M. Hansler, Executive Director











                           SEASONAL DISINFECTION STUDY





                                  U - S . DEPARTMENT OF COMMERCE NOAA
                                  COASTAL SERVICES CENTER
                                  2234 SOUTH HOBSON AVENUE
                                  CHARLESTON , SC 29405-2413



                        National Oceanic and Atmospheric Administration
                                  Grant No. NA85AA-D-CZ-125




                                          April 1990



                                  property of CSC Library















































             Report prepared by Seymour P. Gross, project manager, with advice
             on statistical analysis by Thomas J. Fikslin. Computer graphics
             were by Paul J. Scally. Odette Taft provided additional drafting
             support. Word processing was by Dorothy Golinski. The cover and
             title page were by Pauline Ditmars.









                Executive Summary

                The purpose of this project was to obtain data on the bacterial quality
                of the Delaware River and Bay to determine if Commission water quality
                standards should be changed to permit seasonal disinfection by dis-
                chargers to the tidal Delaware River from the head of tide at Trenton,
                N.J. , to the Penns ylvania-De I aware state line at Marcus Hook, Pa.
                Current standards require year-round disinfection.

                The major source of funding for the project was a $200,000 grant from the
                National Oceanic and Atmospheric Administration (NOAA). The remainder of
                the funding was from municipal contributions.

                The data were collected over a two-year period.       During the first year
                dischargers upstream of the Pennsylvania-Delaware state line were excused
                from providing disinfection from October through April.             Continuous
                disinfection was required at all other times.

                The data indicate that bacterial levels in the winter when the
                disinfection requirement was excused were significantly higher than in
                the winter with disinfection. The impact extended over the entire length
                of the river sampled, including the shellfishing area.          The greatest
                impact was in the Philadelphia - Camden area.        Bacterial levels during
                the entire Study period were affected by untreated sewage from combined
                sewers during both dry and wet weather.         Bacterial levels during the
                first winter were obviously affected by Lhe suspension of disinfection.
                only order of magnitude estimates can be made of the impact of the
                combined sewers.


                It is concluded that the current year-round wastewater disinfection
                requirement    should   remain  in   effect.   This   conclusion   should    be
                re-examined after combined sewer overflows have been corrected to
                essentially eliminate dry weather discharges and reduce wet weather
                discharges,



























                                                   -3-









                                             Table of Contents



             Title Page                                                                1
             Executive Summary                                                         3
             Table of Contents                                                         5
             Introduction                                                              7
             Sampling Program                                                          8
             Sources of Bacteria                                                       9
             Results                                                                 10
                  River Runs - Center Channel                                        10
                  River Runs - Additional Sampling Locations                         12
                  Shellfish Area Sampling                                            13
                  Statistical Analysis                                               14
                  Discussion                                                         15
             Conclusions                                                             16
             Recommendations                                                         18


             Figure One     - General Location Map                                   19
             Figure Two     - Graph 1.1 - Geometric Mean - Fecal Coliform. (MPN)     20
             Figure Three   - Graph 1.2 - Median - Fecal Coliform (MPN)              21
             Figure Four    - Graph 1.4 - Median - Total Coliform (MPN)              22
             Figure Five    - Geometric Mean - Fecal Coliform (MPN),
                                                  Oct. - Nov., Mar.    Apr.          23

             Table I  - River Run Sampling Locations                                 25
             Table  2 -  Shellfish Area Sampling Locations                           26
             Table  3 -  Discharges Not Disinfecting, Oct 1, 1981     Apr 30, 1988   21
             Table  4 -  Precipitation at Wilmington Prior to
                                            Shellfish Area Surveys                   28
             Table  5 -  Precipitation at Wilmington Prior to River Run Surveys      31
             Table  6 -  Precipitation at Philadelphia Prior to River Run Surveys    34
             Table  7 -  Streamflows, Delaware River at Trenton, NJ                  37
             Table  8 -  Analysis of Covariance - Upper River - Fecal Coliform       39
             Table  9 -  Analysis of Covariance - Upper River - Total Coliform       40
             Table  10-  Analysis of Covariance - Lower River - Fecal Coliform       41
             Table  11-  Analysis of Covariance - Lower River - Total Coliform       42

             Appendices                                                              43
                  Appendix I    River Run Data
                  Appendix II    Shellfish Area Data

















                                                    -5-








              Introduction


              The Delaware River Basin Commission held a public hearing in September
              1983 on a proposal to change its disinfection requirements                from
              year-round to seasonal.     The rationale and justification were presented
              in a June 1983 Commission staff report*. The report discussed the basis
              of the need for disinfection, the disadvantages of disinfection with
              particular reference to chlorine, and the data on river bacterial quality
              available at that time. After consideration of the hearing testimony and
              further discussion, it was concluded by the Commission that additional
              data on river bacterial quality were needed.

              This project was designed to assess the impact on river bacterial quality
              of changes in municipal wastewater disinfection practices. The Study
              design was based on the recommendations of the Commission's Water Quality
              Advisory Committee, which includes one member from the water pollution
              control agencies of the Basin states (Delaware, New Jersey, New York, and
              Pennsylvania) and the U.S. Environmental Protection Agency (EPA).
              Representatives of the U.S. Food and Drug Administration and the Delaware
              and New Jersey units responsible for sheilfish management and protection
              participated in the discussions.

              A two-year Study was recommended, which began in July 1987 and ended in
              June 1989.    Figure One is a map of the Study area.        During the first
              winter (October 1987 to April 1988) municipal wastewater facilities
              discharging   to  the   tidal Delaware River between Trenton and            the
              Pennsylvania-Delaware state border (Delaware River Zones 2,3, and 4) were
              excused from the disinfection requirement.      Bacterial criteria for that
              reach of the Delaware River in water quality standards of the New Jersey
              Department   of   Environmental    Protection   (NJDEP),   the    Pennsylvania
              Department of Environmental Resources (PaDER), and the Commission were
              formally suspended from October 1, 1987 to April 30, 1988. NPDES permits
              for a total of 26 wastewater treatment facilities were amended by NJDEP
              and PaDER to suspend the disinfection requirement for the same period.
              All other treatment requirements remained in effect for these facilities
              and continuous disinfection was required    at all other times*

              Samples of the Delaware River and Bay were collected and analyzed by the
              Delaware Department of Natural Resources and Environmental Control
              (DNREC) and the New Jersey Department of Environmental Protection (NJDEP)
              under a series of contracts with the Commission. All field and laboratory
              work in this Study was carried out in accordance with a quality assurance
              project plan** approved by EPA. All data obtained have been entered into
              STORET, the EPA national computer system for water quality data.

              * Seasonal Disinfection Policy for the Delaware River, Delaware River
              Basin Commission, June 1983.

              "Quality Assurance Project Plan, Seasonal Disinfection Study, DRBC - QA
              004.











                                                 -7-







              Funds to defray the costs of the basic Study program which encompassed
              analyses for total and fecal coliform (MPN), were provided by a $200,000
              grant from the National oceanic and Atmospheric Administration and
              $23,000 matching non-Federal funds contributed by municipal wastewater
              discharge operating agencies. Additional municipal contributions were
              used to support analyses for two new recreational bacterial parameters
              (enterococcus and E. coli) and a related fecal coliform analysis (mTEC).

              This Study was directed to the impact of changes in wastewater disinfec-
              tion practices on river bacterial quality.    The Study assessed health
              risks only to the extent that the bacterial parameters tested are
              measures -of health risk.     Since it is not practical to test for
              disease-producing organisms, tests for "indicator" organisms are used:
              counts of "indicator" organisms above a "standard" established on a
              regulatory basis are considered to be presumptive evidence of the
              presence of disease-producing organisms at unacceptable levels.        The
              limitations of this approach must be recognized:      once established a
              bacterial standard becomes a constraint upon water quality management by
              regulatory agencies, yet concentrations of indicator organisms below the
              standard does not necessarily guarantee safety from disease.

              Sampling Program

              Two sets of data were collected from the Delaware River and Bay, river
              run and shellfish area. Each were collected at an average interval of
              twice per month over the entire 24-month Study period.

              Collection and analysis of river run samples was performed by DNREC at a
              minimum of 40 locations. Of these 40 locations, 15 were in the center of
              the navigation channel and 25 were at locations between the navigation
              channel and the shores of the river. The 15 center navigation channel
              locations are shown on Figure One. Latitude, longitude, river mile, and
              STORET station number for the 40 locations are given in Table 1.

              Sample collection began in upper Delaware Bay in the shellfishing area in
              the upper reaches of Zone 6, and extended up the Delaware River into Zone
              2, a few miles below the head of tide at Trenton, N.J. All samples were
              analyzed for total and fecal coliform MPN and enterococcus. Samples from
              locations upstream of River Mile 75 and from all center navigation
              channel locations were also analyzed for E. coli and fecal coliform mTEC.
              Enterococcus, E.coli, and fecal coliform mTEC are "membrane filter"
              analyses.

              Collection and analysis of shellfish area samples was performed by NJDEP
              at 60 locations. The general location of the area from which samples were
              taken is shown on Figure One. Latitude, longitude, river mile, and STORET
              station numbers are given in Table 2. There were five cross-sections or
              1. transects" with six to nine sampling loctions each. The remainder of the
              locations were along the shores of the river or in embayments. All
              samples were analyzed for total and fecal coliform.MPN and half the
              samples were analyzed for enterococcus.








                                              -8-









               Sources of Bacteria


               In   this  Study bacterial     concentrations were measured at         sampling
               locations in the tidal Delaware River and upper Delaware Bay. The
               observed concentrations show the combined effects from all sources, whi       ch
               includes wastewater discharges, combined sewers, tributary streams, and
               non-point sources. The purpose of this Study was to assess the impact on
               river bacterial concentrations of changes in wastewater discharge
               characteristics resulting from the suspension of wastewater disinfection.

               From October 1. 1987 to April 30, 1988, 26 wastewater treatment plants
               discharging to Zones 2,3, and 4 of the Delaware River did not practice
               disinfection. See Table 3 for a list of these discharges, including flow
               data. During this period the total volume discharged by these facilities
               averaged 613 mgd. Virtually all of this volume received secondary
               treatment before discharge.       During July and August 1987, the CCMUA
               Delaware No. I plant, with an average flow of 17 mgd, provided primary
               treatm ent without disinfection. During the month of September 1987 this
               plant was upgraded to secondary treatment with disinfection.The Baldwin
               Run plant (3 mgd), operated by CCMUA, provided secondary treatment
               without disinfection for the entire two-year Study period. The Falls
               Township Authority plant (3 mgd) ceased operation in March 1989 and
               transferred its wastewaters to the Philadelphia - Northeast plant.         From
               October 1, 1988 to April 30,1989, a combined volume of 595 mgd was
               discharged by the plants that did not practice disinfection the previous
               winter.


               Bacteriological quality of the Delaware River is affected by over three
               hundred combined sewer overflows (CSOs) between Trenton and Wilmington*,
               including 176 in Philadelphia and 66 in Camden. CSOs are designed to
               discharge a mixture of untreated wastewater and stormwater runoff during
               wet weather.


               A recently completed study** revealed that many of the CSOs in the
               Philadelphia and Camden area discharge during dry-weather conditions.
               Analyses reported in that study indicated that the impact of the
               dry-weather CSOs exceeds that of the wet-weather CSOs. The impact of
               dry-weather CSOs would be fairly constant over the two-year Seasonal
               Disinfection Study period, increasing overall river bacterial levels. The
               impact of wet-weather CSOs would vary-depending on rainfall.                The
               report** cited above estimated that correction of dry-weather CSOs would
               result in a 75-80 percent reduction in the numbers of bacteria discharged
               under dry and wet weather conditions combined. The report did not
               estimate the resulting reduction in river bacterial levels.

               *Quality Assurance Project    Plan, Seasonal Disinfection Study, DRBC - QA
               004, p. 25.

               **Combined Sewer Overflow Report, Del USA Project Element 8, Delaware
               Estuary Use Attainability Project, January 1988.









                                                  -9-







              Non-point sources also contribute bacteria to the Delaware River. Runoff
              originating as rainfall flows overland and is contaminated by fecal and
              other matter containing bacteria that it comes in contact with. Waterfowl
              are also a significant source of fecal bacteria. There are extensive
              waterfowl feeding areas in wetlands bordering the Delaware River and Bay.
              Sources of bacteria from wetlands are virtually uncontrollable.


              Results


              To evaluate the effect on river bacterial levels of the suspension of the
              disinfection requirement for 26 wastewater discharges in Zones 2,3, and
              4, from October 1987 through April 1988, geometric means and medians of
              bacterial concentrations observed at the various sampling locations for
              that period were compared with the same measures of central tendency for
              the October 1988 through April 1989 period. The data are presented in a
              series of graphs in two appendixes, Appendix I, River Run Data, and
              Appendix II, Shellfish Area Data. Selected graphs are discussed below.

              River Runs - Center Channel


              Graphs 1.1 to 1.10 present geometric means and medians for each of the
              five bacterial parameters at the 15 center navigation channel "river run"
              sampling locations for three periods - October 1987 through April 1988,
              the "non-disinfection" winter, October 1988 through April 1989, the
              "disinfection" winter, and May through September 1988, the intervening
              summer. During the "non-disinfection" winter bacterial levels were higher
              than during the "disinfection" winter for the entire length of the river
              represented by the 15 sampling locations. The greatest differences in
              bacterial levels between the two winters occured in the reach which
              received the discharges excused from disinfection in the non-disinfection
              winter. These differences decrease more or less gradually moving
              downstream until about River Mile 66. Downstream of River Mile 66, -the
              differences in bacterial levels between the two winters do not appear to
              decrease moving downstream. This suggests that the higher bacterial
              levels in the lower river and upper Bay in the non-disinfection winter
              may not be entirely due to the suspension of disinfection.      It is not
              possible to pinpoint the cause or causes. One likely candidate is
              streamflow. During the non-disinfection winter, October 1987 to April
              1988, the flow of the Delaware River at Trenton, N.J., averaged 11,138
              cfs. During the disinfection winter, October 1988 to April 1989, the flow
              averaged 7,633 cfs. The higher flows in the non-disinfection winter might
              have transported the bacteria further downstream than in the disinfection
              winter.







             Graph 1.1 (Figure Two) compares geometric mean fecal coliform levels for
             the two winters and the intervening summer. Also shown are the current
             Commission fecal coliform criteria and a criterion (2000/100ml) used by
             some agencies for surface waters as a source of raw water supply.

             The current Commission criterion of 770/100 ml in Zones 2, 3, and 4 was
             exceeded in the non-disinfection winter. This criterion was based on
             year-round disinfection.   The 770/100ml criterion was also exceeded in
             the non-disinfection winter in the upper reach of Zone 5 for a distance
             of about four miles.

             In parts of Zones 3 and 4 geometric mean fecal coliform levels were as
             high as 5000/100ml in the non-disinfection winter. Zone 3 is designated
             in Commission water quality standards as suitable for sources of public
             drinking water supplies after reasonable treatment. A geometric mean of
             2000/100ml is a commonly accepted criterion for a raw water supply. There
             are no public water supply withdrawals from Zone 3.

             In part of Zone 3, the current 770/100ml Commission criterion was
             exceeded in the disinfection winter and in the summer of 1988. Virtually
             all wastewater discharges received disinfection during these two periods.
             Only an insignificant 3 mgd was not disinfected.

             Zone 3 is significantly affected by the discharge of untreated sewage
             from combined sewer overflows (CSOs) under both dry and wet weather
             conditions. It is believed that the CSOs are the cause of the exceedance
             of the 770/100ml fecal coliform criterion in the disinfection winter and
             the summer. The CSOs also contributed significantly to the high bacterial
             levels observed in Zones 3 and 4 in the non-disinfection winter. The
             exceedance of the 770/100ml fecal coliform criterion in the upper four
             miles of Zone 5 in the non-disinfection winter may also be due in large
             measure, if no, entirely, to the CSOs. It is not possible to estimate the
             impact of the CSOs with any degree of precision. Available water quality
             models would yield order of magnitude results only.     While this would
             indicate the general impact, it would not be considered definitive.
             Because of this, uncertainty in the area of greatest impact of the CSOs
             and the distance and time of passage downstream, it is not possible to
             estimate the effect of the CSOs on the bacterial levels observed in the
             shellfish area.


             Graph 1.1 (Figure Two) shows that fecal coliform levels were higher in
             the non-disinfection winter than in the disinfection winter for the
             entire length of the river, including the shellfishing area. The primary
             cause of the differences in bacterial levels between the two winters was
             the suspension of disinfection in the Trenton to Marcus Hook reach. other
             factors, such as differences in streamflows, may have contributed to the
             severity and extent of the river affected. Discharges from CSOs,
             particularly under dry-weather conditions, increased bacterial levels
             throughout the entire Study period.









               Graph 1.2 (Figure Three) compares median fecal coliform levels for the
               two winters and the intervening summer, along with the fecal coliform
               criterion for shellfishing waters (14/100ml). Generally, median levels
               are quite similar to the levels observed for the geometric mean. Graph
               1.2 (Figure Three) shows that in the non-disinfection winter the fecal
               coliform shellfishing criterion was just met at the upper end of the area
               currently approved for shellfishing. However, at the furthest downstream
               sampling location the non-disinfection winter median was 11/100 ml,
               compared to 8/100 ml duing the disinfection winter.

               Graph 1.4 (Figure Four) compares median total coliform levels for the two
               winters and the intervening summer, along with the total            coliform
               criterion   for   shellfishing    waters   (70/100ml).    Medians   for    the
               non-disinfection    winter   are   significantly   higher    than   for    the
               disinfection winter over the entire length of the river sampled,
               including the shellfishing area. In the reach below River Mile      40, where
               shellfishing is currently permitted, the 70/100ml total coliform,
               shellfishing criterion was met in the disinfection winter but was
               exceeded in -the non-disinfection winter. At the furthest downstream
               sampling location, the median was 112/100 ml in the non-d is infection
               winter and 22.5/100 ml in the disinfection winter. This is a significant
               difference. It is noted that there was no danger to public health during
               the non-disinfection winter. Although taking of shellfish for direct
               marketing is permitted, shellfish taken from this area are considered too
               small and are therefore replanted to allow them to grow to a size more
               suitable for marketing.

               River Runs - Additional Sampling Locations

               Under the river-run sampling program, samples were also collected at 25
               locations between the center of the navigation channel and the shores of
               the river. Geometric means and medians for the various bacterial
               parameters for the two winters at these 25 locations along with the
               geometric means and medians at the 15 center navigation channel sampling
               locations are presented in Appendix I in three-dimensional graphs
               numbered 1.11A through 1.20C. It should be noted that the relationships
               of the positions of the sampling locations shown on these graphs are
               1. schematic" only, particularly the relationships between the "additional"
               locations    and   the   center   channel    locations.   Values    for    the
               non-disinfection winter are presented in the "A" series, values for the
               disinfection winter are presented in the "B" series, and the ratios of
               the non-disinfection winter value to the disinfection winter value are
               presented in the "C" series. In each of these graphs, the value (or ratio
               of values) is presented as a vertical bar. Solid black bars apply to the
               15 sampling locations in the center of the navigation channel. The values
               represented by the solid black bars in the "A" series are the          values
               indicated by "diamonds" in Graphs 1.1 - 1.10.      In the "B" series,  values
               represented by solid black bars are the values indicated by "x" in     Graphs
               1.1 - 1.10. Values obtained at sampling locations between the navigation
               channel and the Pennsylvania or Delaware shore are represented by open










                                                  -12-









               bars denoted in the legend "Left of Chan.(Pa-De)". Values obtained at
               locations between the channel and the New Jersey shore are represented by
               bars filled by diagonals rising to the left and denoted in the legend
                Right of Chan.(NJ)". There were also two sampling locations between the
               channel location and the right of channel location. These are represented
               by bars filled with horizontal lines and denoted by "Mid-River" in the
               legend.

               The relationships between the values obtained at the center channel
               locations and the values obtained at the additional locations varied;
               many center channel location values were lower than the values at the
               nearby    additional   locations,   some   were   higher.      Generally,    the
               relationship between the center and a nearby additional location was the
               same for both winters, e.g., if the additional location value was higher
               than the center value in the non-disinfection winter, it was also higher
               than the center value in the disinfection winter.         This suggests that,
               generally, differences between center location values and the additional
               location values were influenced more.by local factors than by changes in
               disinfection practices.

               The "C" series (Graphs 1.11C - 1.20C) present the ratio of the geometric
               mean or median value observed in the non-disinfection winter to the value
               observed in the disinfection winter. Virtually all ratios are greater
               than one, that is, the value observed in the non-disinfection winter is
               higher than the value observed in the disinfection winter. This confirms
               for the 25 sampling locations between the channel and the shores what
               Graphs 1.1 - 1.10 show for. the 15 center navigation channel sampling
               locations: in the non-disinfection winter bacterial levels were higher
               than in the disinfection winter for the entire length of the river
               sampled, including the shellfishing area.

               Shellfish Area Sampling

               The results of sampling in the shellfish area are presented in Appendix
               II in three-dimensional graphs numbered 2.1A to 2.6C. Geometric means and
               medians for fecal and total coliform and enterococcus are presented for
               the non-disinfection winter in the "A" series, and for the disinfection
               winter in the "B" series. The ratios of the non-disinfection winter value
               to the disinfection winter value are presented in the "C" series. The
               great majority of ratios are more than one, that is, the value observed
               in the non-disinfection winter is greater than the value observed in the
               disinfection winter. This is consistent with what was found in.the
                river-run" data.


               In the "C" series graphs for the shellfish area, the highest ratios
               appear to occur at sampling locations near the shores rather than at
               sampling locations near the middle of the river. The shellfish area is
               more than 30 miles downstream from the reach which received undisinfected
               wastewater discharges. By the time          these wastewaters     reached the
               shellfish    area,    they . would    be   mixed    quite    well    with    the










                                                  -13-









               river water and would have moved downstream with the butk of the river
               water, which occurs in mid-river rather than near shore. The higher
               ratios of non-disinfection winter value to disinfection winter value near
               the shores suggests that shore effects contributed significantly to the
               high    bacterial     levels   observed     in   the   shellfish    area    in    the
               non-disinfection winter. The cause or causes are unknown.

               one possibility is a difference in rainfall patterns between the two
               years,    resulting in different        impacts    from land runoff.        Rainfall
               occurring a day or two prior to the day that the shellfish area was
               sampled would have had a greater impact on river bacterial levels than
               rainfall occurring much earlier. Table 4 compares precipitation data at
               Wilmington for the two winter periods. Precipitation occurring on the day
               of a survey and on each of the seven days preceeding the survey are
               tabulated. The precipitation recorded for the second through the seventh
               day was "weighted" by dividing by the number of the day. The sum of the
               "weighted" precipitation values for the non-disinfection winter is
               significantly more than the sum for the disinfection winter. This
               suggests that the rainfall pattern in the non-disinfection winter
               resulted in runoff contributing more bacteria to the samples collected in
               that winter than runoff contributed to the samples collected in the
               disinfection winter.


               Fecal and total coliform data for most of the shellfish area sampling
               locations are also presented in Graphs 2.11A to 2.14H. Fecal and total
               coliform. geometric means and medians for the two winter periods are
               compared along the five cross-sections or "transects" (series A,B,C,D and
               E), along the centerline channel profile (series F), and along shore
               profiles (series G and H). Once again, at nearly all locations, the
               non-disinfection winter value was significantly greater than the
               disinfection winter value. The transects also show that in this reach of
               the river, in both winters the highest values did not occur in the
               navigation    channel, but along the Delaware or west shore or between the
               channel and   the Delaware shore.


               Statistical   Analysis

               To assess     the statistical significance of the data, analysis of
               covariance     tests    were     performed   on    fecal    and   total     coliform
               concentrations. The purpose was to determine whether the differences in
               bacterial levels observed between years were primarily due to chance
               rather than to changes in disinfection practices.

               The data were divided into two groups: (1) upper river - all river run
               sampling locations above River Mile 55 - encompassing 29 locations, and
               (2) lower river - the remaining river run sampling locations and all the
               shellfish area sampling locations - a total of 71 locations. For each
               data group for each parameter, analysis of covariance tests were
               performed using the following sources: a. disinfection practices,
               sampling locations, and the covariate streamflow, utilizing seven-day
               average flow of the Delaware River at Trenton, N.J. (see Table 7); and b.
               disinfection      practices,      sampling    locations,         and      '.weighted"
               precipitation.    For the lower river,      precipitation at Wilmington, Del.,
               was used (Tables 4 and 5), and for           the upper river, precipitation at
               Philadelphia, Pa., was used (Table 6).




                                                      -14-







               The results are presented In Tables 1, 1, 10, and 11 , for he upper
               and lower river for fecal and total coliform, respectively. All four
               tables show that bacterial levels were significantly affected by the
               disinfection practices and sampling location.          For example,     the
               probability that the differences between years were due to chance is
               always less than five percent and nearly always less than one percent
               (column 6 for the source "disinfection" in column 1).

               The tables also show that bacterial levels were affected by both
               streamflow and precipitation, but the effect was different for each,
               and different for the upper river than for the lower river. Column 6
               in part A of Tables 8 and 9 indicates that the interaction of the
               covariate streamflow and disinfection was not significant. This means
               that the response of bacterial levels in the upper river to streamflow
               was the same in both the non-disinfection winter and the disinfection
               winter, that is, a given rate of streamflow would produce the same
               change in bacterial levels in either winter. Since streamflows were
               significantly greater in the non-disinfection winter, the higher
               bacterial levels in that winter can be partially attributed to the
               higher streamflows.

               Part B of Tables 8 and 9 indicate that the interaction of the
               covariate precipitation     was very significant. This means that the
               response to precipitation in the non-disinfection winter was different
               from the response to precipitation in the disinfection winter. This
               could be the result of a difference in rainfall patterns between the
               two winters in relation to the times of sampling surveys. Such a
               difference would, for example, result in different contributions to
               bacterial levels due to discharges from combined sewers.

               Tables 10 and 11 show that the response to both precipitation and
               strea,mflow was different in the two winters in the lower river,
               including   the   shellfish area.    This   is  consistent   with higher
               streamflows in the non-disinfection winter transporting bacteria
               further downstream than in the disinfection winter. It is also
               consistent with different precipitation patterns in the two winters
               resulting in different contributions of bacteria from land runoff.

               The results of the analysis of covariance tests are consistent with
               higher bacterial levels in the non-disinfection winter being due to
               the combined effect of the suspension of disinfection, different
               streamflows, and different precipitation patterns in the two winters.
               When the    influences of streamflow,      precipitation,    and   sampling
               location   are   removed,   bacterial   levels   remain   higher   in   the
               non-disinfection winter over the entire study area*


               Discussion


               During the period when the wastewater disinfection requirement was
               suspended, bacterial levels were significantly higher than during the
               other portions of the two-year Study period. Higher values occurred
               over the entire length of he river sampled,      and were evident at the








                                                  -15-









              sampling locations in the center of the navigation channel, at the
              river-run sampling locations between the channel and the shores, and
              at the sampling locations in the shellfish area. Factors other than
              the suspension of disinfection, such as dry and wet weather CSOs, land
              runoff, or streamflows, may have contributed     to the higher values.
              However, it must be recognized that these other  factors in combination
              with the suspension of disinfection resulted     in the high bacterial
              levels. Of the various factors, disinfection is  the only one currently
              subject to control.    There is a program underway to correct some of
              the dry-weather CSOs.

              In this Study, there were two sets of samples collected, "river-run"
              and "shellfish area". There were 40 river-run sampling locations, 15
              in the center of the navigation channel, and 25 between the channel
              and the shores. There were 60 sampling locations in the shellfish
              area. The key results were evident from the data obtained at the 15
              center channel locations. Data from the other 85 locations were
              essentially consistent with the data from the 15 and did not
              materially affect the findings.

              Samples were analyzed for up to five bacterial parameters - fecal
              coliform (MPN), total coliform  (MPN), fecal coliform (mTEC), E. coli,
              and enterococcus. The key results were based on total and fecal
              coliform, MPN. Results obtained for the other three parameters were
              essentially consistent with the results obtained for total and fecal
              coliform MPN. When this Study was concluded, analyses for total and
              fecal coliform MPN ceased, but analyses for enterococcus, E. coli, and
              fecal coliform mTEC on samples taken from the center of the navigation
              channel are continuing. The data obtained in this     Study provide an
              excellent data base for relating total and fecal coliform MPN to
              enterococcus, E. coli, and fecal coliform mTEC, and for setting
              recreational water quality criteria based on E. coli   and'enterococcus,
              which are beyond the scope of this report.

              Considerable effort during this Study was devoted     to obtaining data
              during the winter months, December, January, and February. The data
              were examined to determine if the key results were obtainable without
              the samples collected in December, January, and February. Figure Five
              compares geometric mean fecal coliform MPN for the period October 1,
              1987 - November 30, 1987 and March 1, 1988         April 30, 1988 with
              geometric means for the period October 1, 1988    November 30, 1988 and
              March 1, 1989 - April 30, 1989. It is evident from a comparison of
              Figure Five with Figure Two that data for the December - February
              periods made a significant difference.


              Conclusions


              1. Bacterial levels in the non-disinfection winter were significantly
              higher than in the disinfection winter. The impact can be seen for the
              entire length of the river sampled, including the shellfishing area.








              2. In the non-disinfection winter, geometric mean fecal coliform MPN
              values exceeded 5000/100ml in a zone designated'as suitable for water
              supply in Commission water quality standards. A commonly accepted
              criterion for a raw water supply is a geometric mean of 2000/100ml.
              However, there are no public water supply withdrawals in the affected
              zone.


              3. In the non-disinfection winter, geometric mean fecal coliform. MPN
              exceeded the current Commission 770/100ml criterion for a distance of
              about four miles below the Pennsylvania-Delaware state line.

              4. In the non-disinfection winter, median total coliform. exceeded the
              70/100ml shellfishing waters criterion in the approved shellfishing
              area. However, there was no danger to public health since, when
              shellfish are taken from that area, they are replanted to allow them
              to grow to a size suitable for marketing.

              5. In addition to the suspension of disinfection, factors that
              contributed to the observed bacterial levels include combined sewer
              overflows under both dry and wet weather conditions, and non-point
              sources such as runoff from land surfaces resulting from rainfall.

              6. Correction of dry weather combined sewer overflows and reduction of
              wet weather combined sewer overflows would substantially reduce river
              bacterial levels in the Philadelphia-Camden reach of the Delaware
              River. It is not possible to predict the length of river where
              bacterial levels would improve.

              7. Bacterial data obtained at the 15 sampling locations in the center
              of the navigation channel between Torresdale and Ship John Light were
              essential to arrive at the above conclusions. Data obtained at the
              other 85 sampling locations confirmed the results but the conclusions
              would stand without the data from these additional locations.


              8. Total and fecal coliform. MPN measurements were used to reach the
              above conclusions. The measurements of the other three bacterial
              parameters provide a valuable data base for setting water quality
              criteria to protect recreation and for management of Delaware River
              water quality.

              9. Collection of samples during the months of December, January, and
              February was essential to carry out this Study.




















                                               -17-










               Recommendations

               1. The current year-round wastewater disinfection requirement for
               discharges to the tidal Delaware River should remain in effect.

               2. The above recommendation should be re-examined after combined sewer
               overflows have been corrected to eliminate dry weather flows, and
               reduce wet weather flows, or if environmental data collected to assess
               the health protection benefits of current disinfection practices
               indicate that    disinfection   is  not  effective   for  ensuring    such
               protection.

               3. Data for future studies should include analyses for appropriate
               parameters to support current and proposed standards and assess health
               risks.     To   the  extent   practical,   factors   such  as    rainfall,
               streamflows, and time of sampling should be considered in the study
               design.

               4. Data on the new recreational bacterial parameters collected in this
               Study should be reviewed and assessed for the purpose of revising
               current water quality standards.





                                                 Figure One





                                                                          M 133.4                 Trenton






                               P E N N S Y L V A N I A     'Of Phi adelphia               F41 108.4

                                                                       Canwen





                                                    Zone 4 RN 78.8
                       .4 J* Wilmingt n


                          rope                                  N E W   J E R S E Y
                       C      Canal


                                                                             Legend
                                                Zone 5
                                                       RN 48. 2
                                                                             Monitoring station     channel
                         0 E L A W A R E                                     Shellfish area sampling




                                                    Oelaware
                                                       Bay



                                                    General Location Map






                                                    -19-









                   roraph 1.1                               GEOMETRIC MEAN
                                                                FECAL COLIFORM (MPN)
                               10000-




                                      bduld% Water Std--4



                                1000-

                        E
                        0
                        0                                                                          oirrea omd"
                        Z@

                        z
                        0        100-



                        z
                        Ld

                        z
                        0

                                  10-



                                                  10/1/87-4/30/88




                                   130              110              90               70              50


                                                               RIVER MILES (MID CHANNEL)

                        0    NON- DISINFECTION                          a    SUMMER             x    DiSM LC I
                                   WINTER                                      1988                     WIN11.1-







                                                                                                           Figure Three



                                                                                                                                                                                                  craph



























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                                                                                                                                                                                                           0


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                                                                                                                                                                                                           z
                                                                                                                                                                                                           0
                                                                                                                                                                                                           z


                                                                                    (IwOOL/#) NOI.LVI:J.LN3:)NOO                                                                                           0






                                                                                                              Figure Four




                                                                                                                                                                                                       Graph 1.4









                                                                                                                                                                                                               z












                                                                                                                                                                                                               x






                                                2                                                                                                                                                              L'i
                                                0.                                                                                                                                                                  CO
                                                                                                             3



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                                                0


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                                                                                                                                                                                                               z
                                                                                                                                                                                                               0

                                                                                                                                                                                                               U
                                                                                                                                                                                                               LAJ  m
                                                                                                                                                                                                                    Lij



                                                                                            0                                                                                                                  z
                                                                                                                                                                                                               0
                                                               0                                                                                                                                               z


                                                                                       (lu-IOOL/#) NOI.LVb.LN30NOO









                                                                                                                   -22-








                                                        GEOMETRIC MEAN
                                                             FECAL COLIFORM (MPN)
                          1000




                                  Udddlog UUer Std



                           1000-

                    E
                    0
                    0                                                                                ammisam



                    z
                    0       100-





                    0-
                    z
                    0

                              10-



                                              olainfectim emisd
                                              10/i/87-4/3D/09




                               130              110              90               70               50


                                                           RIVER MILES (MID CHANNEL)
                            X 10/1/87-11/30/87 8c 3/1/88-4/30/88             V lo/ 1/88- 11/30/88 & 3/l/89














                                                           TABLE I

                                                RIVER RUN SAMPLING LOCATIONS



                    STOPET
                    NUMBER                                     NAME                                  LATITUDE     LONGI
                     (1)                                       (2)                                     (3)           (4
                -----------------------------------------------------------------------------------------
                091020DE      DELAWARE  BAY  NEAR SHIP JOHN LIGHT OPP. DE SHORE                      39  16 50     75 2
                091020        DELAWARE  BAY  8 SHIP JOHN LIGHT (Mid Channel)                         39  10 05     75 2
                09102ONJ      DELAWARE  BRY  8 MOUTH OF COHANSEY RIVER                               39  19 34     75 2
                091017DE      DELAWARE  BAY  OFF BAKEOVEN PT.                                        39  21 28     75 2
                091017        DELAWARE  SHY  Q MOUTH OF SMYRNR RIVER (Mid Channel)                   39  22 33     75 2
                091017NJ      DELAWARE  BAY  NEAR MOUTH OF MAD HORSE CREEK                           39  23 51     75 2

                091014DE      DELAWARE  RIVER  8 MOUTH OF RPPOQUINIMINK RIVER OPP.      DE SHORE     39  27 10     75 3
                091014        DELAWARE  RIVER  8 MOUTH OF PIPPOQUINIMINK RIVER (Mid     Channel)     39  27 18     75 3
                091014NJ      DELAWARE  RIVER  OFF SALEM NUCLEAR POWER PLANT TOWERS                  39  27 32     75 3
                091002        DELAWARE  RIVER  8 REEDY ISLAND (Mid Channel)                          39  30 46     75 3
                091002NJ      DELAWARE  RIVER  8 REEDY ISLAND OPP. NJ SHORE                          39  30 50     75 3
                091200CD      DELF44FIPE RIVER 8 C&O  CANRL                                          39  34 01     75 3
                091005        DELAWARE  RIVER  8 PER  PATCH ISLAND (Mid Channel)                     39  35 27     75 3
                091005NJ      DELAWARE  RIVER  8 PER  PATCH  ISLAND OPP. NJ SHORE                    39  35 55     75 3
        N)      091008DE      DELFS E   RIVER  3 NEW  CASTLE OPP. DE SHORE                           39  39 30     75 3
        Ln      091008        DELF44FIRE RIVER 8 NEW  CASTLE (Mid Char-onel)                         39  39 17     75 3
                091008NJ      DELAWARE  RIVER  0 NEW  CASTLE  OPP. NJ SHORE                          39' 39 23     75 3

                091011        DEL      ERIVER  8 CHERRY ISLAND (Mid Channel)                         39  43 11     75 3
                091011MR      DELAWARE  RIVER  8 CHERRY ISLAND MID RIVER                             39  43 03     75 3
                09101INJ      @OELF*VPE RIVER  OFF CRRNEY'S PT.                                      39  43 00     75 2
                332046DE      DELAWARE  RIVER  3 OLDMAN*S PT. OPP. OF SHOPE                          39  46 13     75 2
                332046        DELAWRRE  RIVER  13 OLDMAN'S PT. (Mid Channel)                         39  46 06     75 2
                3320464J      OELRWRRE  RIVER  0 OLDM1RN'S PT. OPP. NJ SHORE                         39  45 55     75 2
                332049        DELFURRE  RIVER  8 M1:QCUS HOOK (Mid Channel)                          39  48 00     75 2
                332049NJ      DELAWARE  RIVER  3 MARCUS HOOK OPP. NJ SHORE                           39  47 49     75 2

                892062PA      OELF94RRE RIVER  8 EDDYSTONE   OPP. PH SHORE                           39  51 06     75 2
                892062        DELF44FRE RIVER  0 EDDYSTONE   (Mid Channel)                           39  50 48     75 2
                332052PA      DELAWARE  RIVER  8 PAULSBORO   OPP. PH SHORE                           39  51 11     75 1
                332052        DELAWARE  RIVER  13 PAULSBORO  (Mid Channel)                           39  50 53     75 1
                892065M       DELAWARE  RIVER  8 NAVY YARD   OPP. PH SHOPE                           39  53 02     75 1
                892065        DELAWARE  RIVER  9 NAVY YARD   (Mid Channel)                           39  52 54     75 1
                892065NJ      OELRWRRE  RIVER  8 NAVY YARD   OPP. NJ SHORE                           39  52 45     75 1

                892071        OELRWRRE  RIVER  13 BEN FRANKLIN BRIDGE (Mid Channel)                  39  57 10     75 0
                892071NJ      DELAWARE  RIVER  13 BEN FRANKLIN BRIDGE MID RIVER                      39  57 09     75 0
                892071MR      DELAWARE  RIVER  8 BEN FRANKLIN BRIDGE OPP. NJ SHORE                   39  57 07     75 0
                89207OPn      DELAWARE  RIVER  8 13ETSY ROSS BRIDGE OPP. PH SHORE                    39  59 07     75 0
                892070        DELAWARE  RIVER  8 BETSY ROSS BRIDGE (Mid Channel)                     39  59 04     75 0
                89207ONJ      DELAWARE  RIVER  8 BETSY ROSS BRIDGE OPP. NJ SHORE                     39  59 01     75 0
                892077PA      DELAWARE  RIVER  8 TORRESDALE OPP. PH SHORE                            40  02 26     74 5
                892077        DELAWARE  RIVER  13 TORRESDALE (Mid Channel)                           40  02 24     74 5






















                                                                                             TABLE 2



                                                                            SHELLFISH AREA SAMPLING LOCATIONS




                        SIORET                                                 RIVER                            STORET
                        NUMBER           LRT I TUDE        LONGITUDE           MILE                             NUMBER           LFIT I TUBE
                          (1)               (2)               (3)               (4)                               (1)               (2)
                     -----------------------------------------------------                                   ------------------------------
                     SHELL4204           39  25  54         75  31  35         48.14                         SHELL4115           39  ;4  49
                     SIIELL4204FI        39  25  55         75  31  08         48.17
                     SHELL4204C          39  26  25         75  30  34         48.1e                         SHELL4111           39  23  08
                     SHELL4204D          39  26  52         75  30  02         49.32                         SHELL4109           39  22  42
                     SHELL4204Y          39  25  07         75  32  10         48.10                         SHELL4107           39  22  42
                     SHELL4204Z          39  25  19         75  31  56         48-11                         SHELL4106A          39  22  %
                                                                                                             SHELL4105           39  22  08
                     SHFLL4203           39  26  47         75  29  37         4e.00                         SHELL4104           39  21  50
                     SHELL4202           39  26  29         75  29  07         47.45
                     SHELL4201A          39  2ra 06         75  21B 10         46.56                         SHELL4103           39  20  15
                                                                                                             SHELL4103H          39  20  26
                     SHELL4116           39  23  56         75  29  41         45-63                         SHELL4103C          39  20  40
                     SHELL4116A          39  24  21         75  29  00         45.54                         SHELL4103E          39  21  iE.
                     SHELL4116C          39  24  53         75  28  22         45.67                         SHELL4103F          39  21  ',1
                     SHELL41 IEE         39  25  26         75  27  40         45.69                         SHELL4103W          39  19  10
                     SHELL4116X          39  22  40         75  30  47         45.23                         SHELL4103X          39  19
                     SHELL4116Y          39  23  01         75  30  29         45.31                         SHELL4103Z          39  19  n!.
                     SHELL4116Z          39  23  39         75  30  00         45.55
                                                                                                             SHELL4102F          39  20  14
                     SHELL4112           39  22  04         75  27  31         42.75                         SHELL4102H          39  20  It.
                     SHELL4112FI         39  22  18         75  27  07         42.71                         SHELL4101A          39  20  3(l
                     SHELL4112B          39  22  35         75  26  41         42.66                         SHELL41018          34  20  30
                     SHELL4112D          39  22  55         75  26  11         42.67
                     SHELL4112E          39  23  11         75  25  48         42.67                         SHELL4100           39  le  0(.
                     SHELL-4112V         39  20  43         75  29  22         42.70                         SHELL41008          59  10  34
                     SHELL.4112W         39  21  04         75  28  56         42.70                         SHELL410M           39  19  O@@
                     SHELL4112Y          39  21  26         75  28  25         42.70                         SHELL410OF          39  19  26
                     SHELL41127          39  21  43         75  27  57         42-67                         SHELL4100H          39  19  54
                                                                                                             SHELL41003          39  20  14
                     SHELLDE 1           39  24  13         75  31  34         46.91                         SHELL4100V          39  16  34
                     SHELLDE2            39  23  21         75  31  07         45.91                         SHELL410ON          39  16  5t.
                     SHELLDE3            39  22  14         73  30  32         44.619                        SHELL4100Y          39  17  2to
                     SHEELLDE4           39  20  14         75  28  30         41.77
                     SHELLUE5            39  21  42         75  30  00         43.90
                     SHELLGE6            39  17  52         75  25  44         38.08
                     SHELLDE7            39  17  20         75  25  37         37.58



















                                                                                    TABLE 3


                                                                       DISCHARGES NOT DISINFECTING
                                                                         OCTOBER 1987 - APRIL 1988


                                                                                                                          VOLUME DISC
                                                                                                                          -----------
                                                                                                              RUTH        NON-DIS.    DI
                                                                                                              CAP.        141 NTEP    WI
                         DISU-4RPG;EP                       PERMIT NO.              RIVER  MILE               MGD         MGD         MG

                            211NE 2
                         MOGRISVILLE                        PR0026701               133.0                     5.6         4.80        3.
                         TPEWON                             NJO020923               131.8                     20          18.4        15
                         FIELDSBOPO                         NJO031810               127.0                     0.10        0.051       0.
                         FLaZ:NCE                           NJO023701               123.1                     1.5         0.670       0.
                         LORR BUCKS     Co.                 PF10026468              122.1                     10          8.15        7.
                         BP ISTOL BOPO                      PR0027294               ite.87,0.3                2.7         2.04        2.
                         BUNLINGTON TOWNSHIP                MJ0021709               117.12,0.19               1. 65       1.10        1 .
                         BRISrOL TOWNSHIP                   PR0026450               116.91                    2.25        1.68        1.
                         FALLS TOWNSHIP                     PR0026948               115.63,3.4                3.2         3.05        1.
                         BEM@RLY                            NJO027481               114.7                     1.0         0.490       0.
                         DELS*N                             NJO023507               111.0                     1.5         1.19        1.
                         PIqRTON                            NJO021610               108.6                     0.22        0.128       0.

                            ZO@C 3
                         cittmiNSON                         t4JO024007              108-82                    2.0         1.30        1.
                         PALMYRA                            NJO024449               107.66                    0.53        0.546       0.
                         PENNSAUKEN                         NJO025348               104.9                     4.0         3.09        3.
                         PHILA NE                           PR0026689               104.2                     210         196         is
                         ccmj+-BRWWIN RUN                   NJO024481               103.2                     4.5         2.56        3.
                         CC" DEL Mo. I                      NJO026182               97.93                     so          30.2        33
                         PH ILA SE                          PROO26662               96.7                      112         106         10

                            ZCNE 4
                         RTW:ffER KENT (FT MIFFLIN)         PROO52329               91.5                      0.003       0.001       0.
                         PHILA SW                           PROO26671               90.7                      200         181         1
                         GLOLcESTEP COUNTY UR               NJO024686               89.7                      16.5        14.2        14
                         TINIcum                            PROO26380               85.28,1.0                 1.4         0.800       0.
                         EDDYSTONE                          PROO28355               84.0                      0.80        0.478       0.
                         OELCMR                             PR0027103               80.7                      44.0        34.4        36
                         LOQ`lN TWP                         NJ0027545               79.0                      1.0         0.471       0.


                         TOTAL                                                                                727         613         5













                                                                             TF13LE 4


                                                PRECIPITATION AT WILMINGTON PRIOR TO SHELLFISH APER SURVEYS


                               NO. DRYS                                                              NO. DAYS
                  DATE OF       BEFORE                           WEIGHTED               DATE OF       BEFORE
                  SURVEY        SURVEY     DRTE        PRECIP     PRECIP                SURVEY        SURVEY      DATE        PPECIP
                     (1)          (2)        (3)         (4)       (5)                    (1)           (2)        (3)         (4)
                 - ----------------------------------------------                      ---------------------------------------
                 10/13/87          2       10/11         0.01      0.01                02/09/aS          5        02/04        0.35
                                   6       10/07         0.30      0-05                                  7        02/02        0-30

                                                         0.31      0.06                                                        0-65



                 10/213/87         1       10/27         1.04      1.04                02/16/199         1        02/15        0.33
                                   7       10/21         0.05      0.01                                  4        02112        1-14
                                                         ----      ----                                  5        02/11        0.62
                                                         1.09      1.05                                                        ----
                                                                                                                               2.09


                 11117187          6       11/11         0.30      0-05
                                   7       11/10         1.04      0.15                02122108          2        02120        0.05
                                                         ----      ----                                  3        02/19        1.119
                                                         1.34      0.20                                  6        02/16        0.06
                                                                                                         7        02/15        0-33


                 11/30/87          0       11/30         0.86      0.86                                                        1.62
                                   1       11/29         1.13      1.13
                                   2       11128         0.13      0.07
                                                         ----      ----                03/01/88          3        02127        0.07
     00
     1                                                   2.12      2.06                                  7        02/23        0.04

                                                                                                                               0-11
                 12/10/87          0       12/10         0.12      0.12
                                   1       12/09         0.02      0.02
                                   7       12/03         0.06      0.01                03/22/88          4        03/18        0.02

                                                         0.20      0-15                                                        0.02



                 12/15/87          0       12/15         0.66      0.66                04/11/08          3        04/08        0.01
                                   4       12/11         0.23      0-06                                  4        04/07        0.91
                                   5       12/10         0.12      0.02                                  5        04/06        0.02
                                   6       12/09         0.02      0.00                                  7        04/04        0.03

                                                         1.03      0.70                                                        0.97



                 01125188          0       01/25         0.82      0-82                04/25/88          2        04/23        0.24
                                   5       01/20         0.71      0.14                                  7        04/18        0.16
                                   6       01/19         0.04      0.01
                                   7       01/18         0.31@     0.04                                                        0.42


                                                         l.ea      1.01














                                                                     TABLE 4 (Cont.)

                                              PRECIPITATION AT WILMINGTON PRIOR TO SHELLFISH AREA SURVEYS

                              NO. DRYS                                                          NO. DRYS
                 DATE OF       BEFORE                         WEIGHTED             DATE OF       BEFORE
                 SURVEY        SURVEY    DATE       PRECIP     PRECIP              SURVEY        SURVEY     DATE       PRECIP
                    (1)         (2)       (3)         (4)       (5)                   (1)          (2)       (3)        (4)
                 -----------------------------------------------                  --------------------------------------
                 10/03/88        0       10/03        0-06      0.06              01/30/89          0       01/30       0.26
                                 1       10/02        0.22   .  0.22                                3       01/27       0.02
                                                      ----      ----                                4       01/26       0.07
                                                      0.28      0.28                                                    ----
                                                                                                                        0.35

                 10/19/88        1       10/18        0.01      0.01
                                                      ----      ----              02/14/e9          0       02/14       0.29
                                                      0.01      0.01                                1       02/13       0.12
                 11/07/88        2       11/05        0.33      0.17                                                    0.41
                                 6       11/01        0.70      0.12
                                                      ----      ----              02/28/139         2       02/26       0.29
                                                      1.03      0-29                                4       02/24       0.01
                                                                                                    6       02/22       0.36
                 12/01/88        2       11128        0.48      0.24                                7       02/21       0. B3
                                 3       11/27        1.27      0.42                                                    1.49

                                                      1.75      0.66
                                                                                  03/13/89          7       03/06       1.03

                 12/05/88        7       11/28        0.48      0.07                                                    1.05

                                                      0.4e      0.07
                                                                                  03/28/89          4       03/24       1.32
                 12/19/88                                                                           5       03/23       0.01
                                                                                                    7       03/21       0.06
                 01/03/89        0       01/03        0.09      0.09                                                    1.39
                                 2       01/01        0-16      0.08
                                 6       12/213       0.13      0-02              04/11/89          2       04/09       0.06
                                                      ----      ----                                3       04/08       0-01
                                                      0.38      0.19                                4       04/07       0.37
                                                                                                    5       04/06       0.23
                                                                                                    6       04/05       0.41
                 01/17/89        2       01/15        0.61      0.31                                                    ----
                                 3       01/14        0.10      0.03                                                    1.08
                                 5       01112        0.60      0.12

                                                      1.31      0.46




















                                                                   TABLE 4 (Cant.)

                                           PRECIPITATION RT WILMINGTON PRIOR TO SHELLFISH AREA SURVEYS


                                        NON-DISINFECTION WINTER                          DISINFECTION WINTER
                                  --------- ----------------    ------           --------------------------------
                                                            WEIGHTED                                       WEIGHTED
                                   DATE OF      PRIOR         PRIOR               DATE OF      PRIOR         PRIOR
                                   SURVEY       PRECIP       PRECIP               SURVEY       PRECIP       PRECIP
                                      (1)        (2)          (3)                    (1)        <2)           Q>
                                  --------------------------------               --------------------------------
                                  10/13/87       0.31         0-06               10/03/88       0.28          0.28
                                  10128197       1.09         1.05               10/19/88       0.01          0.01
   w                              11/17/87       1.34         o.20               11/07/88       1.03          0.29
                                  11/30/87       2.12         2.06               12/01/80       1.75          0.66
                                  12110107       0.20         0.15               12/05/00       0.48          0.07
                                  12/15/87       1.03         0.70               12/19/08       0.00          0.00
                                  01/25/88       I.BB         1.01               01/03/89       0.30          0.19
                                  02/09/08       0.65         0.11               01/17/e9       1.31          0.46
                                  02/16/88       2.09         0-78               01/30/89       0-35          0.29
                                  02122188       1.62         0.43               02/14/89       0.41          0.41
                                  03/01/88       0.11         0.03               02/28/89       1.49          0.35
                                  03/22/BB       0.02         0.00               03/13/e9       1.03          0.15
                                  04/11/08       0.97         0.23               03/28/B9       1.39          0.34
                                  04/25/08       0.42         0.15               04/11/09       1.08          0.24
                                                -----         -----                            -----          -----
                                  SUM           13-85         6.96               sum           10.99          3.74














                                                                                 TABLE 5


                                                   PQECIPITHTION AT WILMINGTON PRIOR TO RIVER RUN SURVEYS

                                  NO. DRYS                                                                NO. DAYS
                    DATE OF        13EFORE                          WEIGHTED                DATE OF        BEFORE
                    SURVEY         SURVEY     DATE        PRECIP     PRECIP                 SURVEY         SURVEY     DATE         PRECI
                       (1)          (2)        (3)          (4)        (5)                     (1)          (2)         (3)         (4)
                           - ---------------------------------------                       -------------------------------------
                   10/06/87          2        10/04         0.01       0.00                02/09/aB            5      02/04         0.35
                                     3        10/03         0.90       0.30                                    7      02/02         0.30
                                     6        09/30         0.20       0.03                                                         ----
                                                            ----       ----                                                         0.65
                                                            1.11       0.33


                                                                                           02/17/88            1      02/16         0-06
                   10/26/87          5        10121         0.05       0.01                                    2      02/15         0.33
                                                            ----       ----                                    5      02/12         1.14
                                                            0.05       0.01                                    6      02/11         0.62

                                                                                                                                    2.15
                   11/04/87


                                                                                           02122188            2      02120         0.05
                   11/13/87          2        11/11         0.30       0.15                                    3      02/19         1.18
                                     3        11/10         1.04       0.35                                    6      02/16         0.06
                                                                       ----                                    7      02/ln         0.33
                                                            1.34       0.50                                                         ----
                                                                                                                                    1.62

                   12/09/87          0        12/09         0.02       0.02
                                     6        12/03         0.06       0.01                03/01/88            3      02127         0.07
                                                            ----       ----                                    7      02/23         0.04
                                                            0. 01B     0.03
                                                                                                                                    0.11


                   12/14/87          3        12111         0.23       0.08
                                     4        12110         0.12                           03/22/88            4      03/113        0.02
                                     5        12/09         0.02       0.00                                                         ----
                                                            ----       ----                                                         0.02
                                                            0.37       0.11


                                                                                           04/05/88            1      04/04         0.03
                   01/22/8B          2        01/20         0.71       0.35                                    4      04/01         0.04
                                     3        01/19         0.04       0.01                                                         ----
                                     4        01/18         0.31       0.08                                                         0.07


                                                            1.06       0.44
                                                                                           04/21/88            3      04/18         0.113
                                                                                                               5      04/16         0.02
                                                                                                               6      04/15         0.09


                                                                                                                                    0.29
















                                                                                THBLE 5 (Cont-)

                                                       PRECIPITFITION HI WILMIM610M PRIOR TO RIVER RUN SURVEYS

                                     NO. ORYS                                                                 NO. ORYS
                        O"TE OF        BEFORE                           WE ICA iTED              ORTE OF        BEFORE
                        SURVEY         SUR4JEY    DATE        PRFCIP      PRECIP                 SURVEY         SURVEY     ORTE          PA
                           (1)          (23        (3)          (4)        (5)                     (1)           4(2)        (5)
                       - --- - ----------------------------------------                         -----------------------------------
                       10/12/130          7       10/05         0.05       0.01                 01/23/139


                                                                0.05       0-01
                                                                                                02/07/89            2      02/05          0
                                                                                                                    4      02/03          0
                       10/25/M            1       10/24         0.11       0-11
                                          3       10/22         0.00       0.03                                                           0
                                          4       10/21         1.41       0.47
                                          7       10/18         0.01       0.00                 02/22/89            0      02122          0
                                                                ----       ----                                     1      02/21          0
                                                                1.61       0.61                                     2      02/20          0
                                                                                                                    7      02/15          0

                       11/14/W            1       11/13         0.33       0.33                                                           1
                                          4       11/10         0-08       0-02

                                                                0.41       0-35                 03/13/89            7      03/06          1
                       11/20/89           0       11/21B        0.48       0.40                                                           1
                                          1       11127         1.27       1.27
                                                                                                03./27/a9           3      03/24          1
                                                                1.75       1.75                                     4      03/23          0
                                                                                                                    6      03/21          0
                                                                                                                    7      03/20          0
                       12/08/68



                       121151M            6       12/09         0-02       0.00
                                                                ----       ----                 04/11/89            2      04/09          0
                                                                0.02       0.00                                     3      04/00          c
                                                                                                                    4      04/07          c
                                                                                                                    5      04/06          c
                       01/09/189          0       01/09         0.01       0-01                                     6      04/05          c
                                          1       01/00         0.08       0. 08
                                          3       01/06         0.46       0.15                                                           1
                                          5       01/04         0-02       0.00
                                          6       01/03         0.09       0.02
                                                                ----       ----                 04/19/89            0      04/19          0
                                                                0.66       0.31                                     1      04/18          0
                                                                                                                    4      04/15          0


                                                                                                                                          0



















                                                                                            TABLE 5 (Cont.)

                                                                PRECIPATION AT WILMINGTON PRIOR TO RIVER RUN SMVEyS


                                                       NON-DISIWECTION WINTER                                          DISINFECTION WINTER
                                                -----------------------------------                          ----------------------------
                                                                                 WEIGHTED                                                       WEIGHT
                                                 DATE OF          PRIOR            PR I OR                     DATE OF          PRIOR            PRIllk
                                                 SLlRVE Y        PRECIP            PRECIP                      SURVEY          PRECIP           PREC I
                                                    0)             (2)              (3)                           (1)           (2)               <3')
                                                ------------------------------------                         ------------------------------
                                                10106187           1.11             0-33                     10112188           0.05              0.01
                                                10/26/97           0-05             0.01                     10/25/EIB          1.61              0.61
                                                11/04/07           0.00             0-00                     11/14/08           0-41              0- 15
                                                11/13/87                            0-50                     11128108           1.75              1. ?@-
        LI1                                     12/09/07           0.06             0.03                     12/08/BB           0.00              0-00'
                                                12/14/87           0.37             0.11                     12/15/08           0-02              0.00
                                                01122100           1.06             0.44                     01/09/89           0.66              0.31
                                                02/09/80           0-65             0.11                     01/23/69           0.00              0.00
                                                02117180           2.15             0.55                     02/07/09           0.52              0-13
                                                02122188           1.62             0.46                     02/22/09           1-52              1. 215
                                                03/01/80           0.11             0.03                     03/13/89           1.03              0- 1!1
                                                03122100           0-02             0-01                     03/27/09           1-71              0.50
                                                04/05/88           0.07             0-04                     04/11/89           1.00              0-24
                                                04121100           0.29             0.08                     04/19/89           0.95              0.31)

                                                SLIM               0.92             2.72                     SLIM               11.31             5.69
















                                                                     TABLE 6                                               F

                                          PRECIPITATION AT PHILADELPHIA PRIOR TO RIVER RUN SURVEYS

                           NO. DAYS                                                         No. DRYS
               DATE OF      BEFORE                        WEIGViTED            DATE OF       BEFORE
               SURVEY       SURVEY    DATE       PRECIP    PRECIP              SURVEY        SURVEY    DATE       PRECIP
                 (1)         (2)       (3)        (4)       (5)                   (1)         (2)       <3)         (4)
              ------------------------------------------------                -----------------------------------------
              10/06/87        2       10/04       0.05      0.03              02/09/88          5      02/04        0.54
                              3       10/03       0.99      0.33                                6      02/03        0.01
                                                  ----      ----                                7      02/02        0.55
                                                  1.04      0.36                                                    ----
                                                                                                                    1.10


              10/26/87        5       10121       0.02      0.00
                                                  ----      ----              02117188          1      02/16        0-11
                                                  0.02      0.00                                2      02/15        0.31
                                                                                                5      02/12        1.35
                                                                                                6      02/11        0-36
              11/04/87                                                                                              ----
                                                                                                                    2.13


              11/13/87        2       11/11       0.34      0.17
                              3       11/10       0.90      0.30              02/22/08          2      02/20        0-09
                                                  ----      ----                                3      02/19        0.72
                                                  1.24      0.47                                6      02/16        0.11
                                                                                                7      02/15        0.31


              12/09/87        6       12/03       0.04      0.01                                                    1.23


                                                  0.04      0.01
                                                                              03/01/88          3      02/27        0-03
                                                                                                7      02/23        0.04
              12/14/87        3       12/11       0.13      0.04
                              5       12/09       0.10      0.03                                                    0.07


                                                  0-23      0.07
                                                                              03/22/88          4      03/18        0.01

              01/22/88        2       01/20       0.70      0.35                                                    0.01
                              3       01/19       0.02      0.01
                              4       01/11B      0.44      0.11
                                                                              04/05/88          1      04/04        0.07
                                                  1.16      0.47'                               4      04/01        0.02


                                                                                                                    0.09



                                                                              04/21/88          3      04/18        0.18
                                                                                                6      04/15        0-10


                                                                                                                    0.28















                                                                               TABLE 6 (Cont.)

                                                       PRECIPITATION AT PHILADELPHIA PRIOR TO RIVER RUN SURVEYS

                                       MO. DRYS                                                             NO. DRYS
                          DATE OF       BEFORE                          WEIGHTED               DATE OF       BEFORE
                          SURVEY        SURVEY     DATE        PRECIP    PRECIP                SURVEY        SURVEY     DATE
                            (1)          (2)        (3)         (4)        (5)                   (1)           (2)       (3)
                          -----------------------------------------------                     --------------------------------
                          10/12/88          4      10/08        0.01       0.00               02/09/89           3      02/06
                                            7      10/05        0.03       0.00                                  4      02/05
                                                                ----       ----                                  6      02/03
                                                                0.04       0.00



                          10/25/88          1      10/24        0.08       0.08
                                            3      10/22        0.23       0.00               02/22/89           0      02122
                                            4      10/21        1.37       0.34                                  1      02/21
                                            6      10/19        0-02       0.00                                  2      02/20
                                            7      10/18        0.01       0.00                                  7      02/15

                                                                1.71       0.50



                          11/14/88          1      11/13        0.31       0.31               03/13./89          6      03/07
                                            4      11/10        0.05       0.01                                  7      03/06


                                                                0.36       0-32


                          11128189          0      11/28        0.64       0.64               03/27/89           3      03/24
                                            3      11/27        1.14       0-38                                  4      03/23
                                                                ----       ----                                  6      03/21
                                                                1.78       1.02                                  7      03/20



                          12108188

                                                                                              04/11/89           2      04/09
                          12/15/Ba          4      12111        0.01       0-00                                  3      04/08
                                            6      12/09        0.03       0.00                                  4      04/07
                                                                ----       ----                                  5      04/06
                                                                0.04       0-00                                  6      04/05
                                                                                                                 7      04/04


                          0/09/89           0      01/09        0.01       0.01
                                            1      01/08        0.12       0.12
                                            3      01/06        0.52       0-17
                                            5      01/04        0.02       0.00               04/19/89           0      04/19
                                            6      01/03        0.03       0.01                                  1      04/118
                                                                ----       ----                                  4      04/15
                                                                0.70       0.31



                          M/23/e9






















                                                                            TABLE 6 (Cant.)


                                                   PRECIPITATION AT PHILADELPHIA PRIOR TO RIVER RUN SURVEYS



                                             NON-DISINFECTION WINTER                               DISINFECTION WINTER

                                        - - ----------------------------                   -------------------------------
                                                                   WEIGHTED                                            WEIGHTE
                                         DATE OF      PRIOR          PRIOR                  DATE OF       PRIOR          PRIOR
                                        SURVEY       PRECIP         PRECIP                  SURVEY       PRECIP         PRECIP
                                           <1>         (2)           (3>                      (1)          <2)            <3>

                                        -------------------------------                    ----------  ---------------------
                                        10/06/B?       1.04          0.36                  10/ 12/01B      0.04           0.00
                                        10/26/137      0.02          0.00                  10/25/80        1.71           0.50
                                        11/04/67       0.00          0.00                  11/14/08        0.36           0.32
                                        11/13/87       1-24          0.47                  11128108        1.78           1.02
                                        12/09/87       0.04          0.01                  12108108        0.00           0.00
                                        12/14/07       0-23          0.07                  12/15/08        0.04           0.00
                                        01122188       1.16          0.47                  01/09/09        0.70           0.31
                                        02/09/BB       1.10          0.19                  01/23/89        0.00           0-00
                                        02/17/88       2.13          0.60                  02/07/09        0.42           0.07
                                        02122108       1.23          0.35                  02/22/89        2.15           1.67
                                        03/01/BB       0.07          0.03                  03/13/89        1.09           0.15
                                        03/22/88       0.01          0.00                  03/27/09        1.71           0.48
                                        04/05/88       0.09          0.08                  04/11/69        0.06           0.19
                                        04/21/88       0.28          0.00                  04/19/89        0.86           0.36


                                        sum            8.64          2.71                  sum             11.72          5.07













                                                                                              TABLE 7                                                      P


                                                            5TREAMFLOW5, DELAWARE RIVER AT TRENTON, N.J.


                                      NON--DISINFECTIOM WINTER                                                               DISINFECTION WINT
                            --------------------------------------                                           --------------------------
                            M0HTH,'YR          DATE         ON DAYS OF SAMPLE                                MONTH,YR           DATE         ON DAYS
                                                                   COLLECTION                                                                       COLL
                            (Fliver Pun dates)               ------------------                              (Rivev Pun dates)                --------
                                                               FLOW         7-DAY AVG                                                            FLOW
                                                                  CFS        FLOW,CFS                                                              CF5

                                 (1)             (2)              (3)             (4)                                              (2)             (3)
                            --------------------------------------                                           --------------------------


                            Ot.:t  87               6             11500           10844                      Oct    68             12               3090
                            .:)(--t 87           26                5190            S591                      Oct    88             25               5240
                            Acw    87               4             10800           15229                      Nov    Be             14               5940
                            Ncw    S 7           13                9890            9040                      Nov    88             21B             16300
                            Di*c   El 7             9             12300           16386                      Dec:   BIB              a              6990
                            Dom    87            14                9100           11114                      Dec:   88             15               5060
                            Jan    88            22               12400            7663                      Jon    89               9              4890
                            Fitb   88               9             13200           20014                      Jan    89             23               4060
                            Fa?b   88            17               12900           11544                      Feb    09               7              4210
                            F"b    88            22               14400           14543                      Feb    09             22              12000
                            Misr   80               1              8660           10766                      M&P    69             13               5620
                            Misr   86            22               10800           13857                      Mor-   69             27              19600
                            Apr    86               5             13700           17314                      APP    89             It              14100
                            AF3r   Elf)          21                6220            6673                      Apr    E19            19              11400


                                           Aver-age               10790           12184                                      Average                8464

















                                                                                                                             TABLE 7



                                                                                 --.TREPMFLOWS, DEL6WnRE RIVER AT TRENTON, N.J.



                                                    NON-DISINFECTION WINTER                                                                                          DI31NFECT19t4 WIt4
                                                                                                                                                ---------------
                                       MONTH,YR                 DATE             ON DAY3 OF SAMPLE                                              MONTH,YR                 DhT E           ON DAYS
                                                                                          COLLECTION                                                                                               COL
                                       @5h& I If i sh ar-ea                                                                                     (5hal If is-h ar-ea
                                         tsur-,.,ey dates)                           Ft-CIW           7-[)P.Y 19VG                                Sur-aey dates)                              FLOW
                                                                                        CF5           FLOW,CF5                                                                                   CFS

                                              (1)                  (2)                  (3)                  (4)                                                                                 (3)



    00                                 Du t     87                 13                     90-750               956 1                            Oct      Be                                        426
                                       Oc -, t  87                 ?a                     9600                 6031                             Oct      88                     9                  333
                                       N(w      87                 17                     8920               10037                              t4cv     138                    7                  5ae
                                       N(w      -3 7               30                   19000                103019                             Dec:     66                     1                10,90
                                       -:)f?c   W                  to                   117-30               14729                              Dec      88                     5                  7 47
                                       0*?c     E37                15                     9010               10501                              Dec      88                 '.9                    445
                                       J iin    88                 25                     7950                 9486                             Jan      89                     3                  4719
                                       Fipb     88                     9                13200                20014                              Jan      89                 17                     677
                                       Fob      E38                16                   12500                11430                              Jan      (39                30                     5137
                                       F*?b     86                 22                   14430                145-1--:                           Fab      89                 14                     331
                                       mar-     613                    1                  E; 6,53 0          10 766                             Feb      89                 26                     7.51
                                       Mar      E38                22                   1 C-8130             13-357                             Mar-     89                 12,                    562
                                       lipr-    88                 1 1                    9010               11744                              Mar-     89                 26                   1790
                                       Apr-     88                 25                     _rz: 2 3 0           5394                             Apf-     89                 11                   1410


                                                            Aver-aae                    1064-1               11364                                                   A'.'evage                     726
















                                                                                      TABLE 8


                                                                             ANALYSIS OF COVAPIANCE


                                                                       UPPEP PIVEP - FECAL COLIFOPM


                                          A. Streamf low - Delaware Piver at Trenton (?-day av.                        R-Squave = 0.57

                                                                             Degrees of Sum of            Mean
                                          Source                              Fveeedom Squares           Square         F         Prob-
                                              (1)                                 (2)          (3)         (4)         (5)          (6)

                                          Disinfection                                1        420.0       420.0      311-35      <.01
                                          Station                                   28         969.6        34-6       25-67      <.01
                                          Flow                                        1          4.1          4.1       3-02      .063
                                          Disinfection*Flow                           1          0.5          0-5       0-36      .551ns
                                          Err-or                                  775         1045.3          1.3
                                          TOTAL                                   806         2439.4

                                          Partial Sums of Squares

      W                                   Disinfection                                1         75.7        75.7       '56. 14    <.01
                                          Station                                   28         969.9        34.6       25.613     <.Ol
                                          Flow                                        1          4.3          4.3       3.21      .074
                                          Disinfection*Flow                           1          0.5          0.5       0-36      .551nu

                                                                                                                ns     not significant


                                          B. Precipitation         Philadelphia (weighted)                             R-Square = 0.65

                                                                             Degrees of -Sum of           Mean
                                          Source                              Fveeedom Squares           '@,quare       F         Prob.
                                              (1)                                 (2)          (3)         (4)         (5)          (6)

                                          Disinfection                                1        420.0       420.0      383.11      <.Ol
                                          Station                                   28         969.6        34.6       31.59      <.01
                                          Precipitation                               1        186.5       186.5      170-10      <.Ol
                                          Disinfection*Prec                           1         13.9        13.9       12-68      <.01
                                          Error                                   775          849.5          1.1
                                          TOTAL                                   e06         2439.4

                                          Partial Sums of Squares

                                          Disinfection                                1        235.5       235.5      214.02      <_01
                                          Station                                   219        970.6        34.7       31.62      <.01
                                          Precipitation                               1        160.2       160.2      146.17      <.01
                                          Disinfection*Prec                           1         13.9        13-9       12-619     <.01















                                                                                      TA13LE 9


                                                                            ANALYSIS OF COVRRIHNCE


                                                                       UPPER RIVER - TOTAL COLIFORM


                                         A. Streamf low - Delaware River at Trenton (?-day av.                          R-Square       0.59

                                                                            Degrees of Sum of              Mean
                                         Source                                Freedom Squares           Square          F         Prob.
                                             (1)                                  (2)          (3)         (4)          (5)          (6)

                                         Disinfection                                 1        415.3       415.3      330.73       <.01
                                         Station                                   28        1003.8          35.8       21B. 55    <.01
                                         Flow                                         1          7.0          7.e        6-19      .013
                                         Disinfection*Flow                            1          0.5          0.5        0.41     .521ns
                                         Error                                    775          973.2          1.3
                                         TOTAL                                    (306       2400.5

                                         Partial Sums of Squares

                                         Disinfection                                 1         61.5         61.5       40-99      <.01
                                         Station                                   28        1003.6          35.13      29.54      <_01
                                         Flow                                         1          7.3          7.3        5.80      .016
                                         Disinfection*Flow                            1          0.5          0.5        0.41 .521ns

                                                                                                                ns      not significant


                                         B. Precipitation          Philadelphia (weighted)                              R-Square = 0.67

                                                                            Degrees of Sum of             Mean
                                         Source                                Freedom Squares           Square          F         Prob.
                                             (1)                                  (2)          (3)         (4)          (5)          (6)

                                         Disinfection                                 1        415.3       415.3      400.53       <.01
                                         Station                                   28        1003.8          35.0       34.57      <.01
                                         Precipitation                                1        161.3       161.3      155.57       <.01
                                         Disinfection*Prec                            1         16.6         16.6       15.%       <.01
                                         Error                                    775          803.6          1.0
                                         TOTAL                                    806        2400.5

                                         Partial Sums of Squares

                                         Disinfection                                 1        221.4       221.4      213.55       <.01
                                         Station                                   26        1004.7          35.9       34.61      <.01
                                         Precipitation                                1        148.3       146.3      142.9e       <.01
                                         Disinfection*Prec                            1         16.6         16.6       15.913     <.01
















                                                                               TABLE 10


                                                                       ANALYSIS OF COVARIANCE


                                                                  LOWER RIVER - FECAL COLIFORM


                                       A. StreAmflow       Delaware River at Trenton (7-damj. av.)               R-Square     0-57

                                                                        Degrees of Sum of           Mean
                                       Source                              Freedom Squares        Square          F        Prob.
                                           (1)                                (2)        (3)          (4)        (5)         (6)


                                       Disinfection                              1         93.6       93.6      100.22     <.01
                                       Station                                 70        425-6           6.1      6.51     <.01
                                       F I ow                                    1         95.2       95.2     10 1. 98    <-01
                                       Disinfection*Flow                         1         29.3       29.3       31 - 31B  <-01
                                       Error                                  527        492-0           0.9
                                       TOTAL                                  600        1135-7


                                       Partial Sums of Squat-as

       41                              Disinfection                              1           4.5         4.5      4. FJF-  .028
                                       Station                                 70        314.19          4.5      4. 82    <.01
                                       Flow                                      1         81.4       81.4       87.10     <.01
                                       DisinfectionitFlow                        1         29.3       29.3       31.31B    <-01


                                       B. PrOcipitatiors - Wilmington (weighted)                                 R-Square = 0-50

                                                                        Degrees of Sum of           Mean
                                       Source                              Freedom Squares        Square          F        Pr-ob.
                                           (1)                                (2)        (3)          (4)        (5)         (6)


                                       Disinfection                              1         93.6       93.6       87-04     <-01
                                       Station                                 70        425.6           6.1      5.65     <.01
                                       Precipitation                             1         23.8       23.8       22.12     <-01
                                       Disinfection*Prec                         1         26.2       26.2       24.38     <.01
                                       Error                                  527        566.6           1.1
                                       TOTAL                                  6M         1135.7

                                       Partial Sums of Squares

                                       Disinfection                              1         719.3      M.3        72.82     <.01
                                       Station                                 70        439.3           6.3      5.84     <.01
                                       Precipitation                             1         49.2       49.2       45.72     <.01
                                       Disinfection*Proc                         1         26.2       26.2       24.30     <.01
















                                                                                       TABLE I I


                                                                              ANALYSIS OF COVRRIANCE


                                                                       LOWER RIVER - TOTAL coLiFoRm


                                         A. StrooWlaw - Delaware River at Trenton (7-daji@j av.                            R-Square = 0.61

                                                                              Degrees of Sum of              Mean
                                         Source                                  Freedom Squares            Square          F         Prob.
                                             (1)                                    (2)          (3)          (4)          (5)           (6)


                                         Disinfection                                  1         232.8        232.8      190.78       <. 01
                                         Station                                     70          496.8           7.1        5. 82     <.01
                                         Flow                                          1         1,73.6       173.6      142.28       <.01
                                         Disinfection*Flow                             1          96.4         96.4        78.95      <.01
                                         Error                                      527          643.2           1.2
                                         TOTAL                                      600         1642.8

                                         Partial Sums of Squares

                                         Disinfection                                  1          17-5         17.5        14.32      <.01
                                         Station                                     70          392.5           5.6        4.59      <.01
                                         Flow                                          1         141.1        141.1      115.59       <.01
                                         Disinfor-tion*Flow                            1          96.4         96.4        71B. 95    <.01


                                         B. Precipitation           Wilmington (weighted)                                  R-Square = 0.49

                                                                              Degrees of Sum of              Mean
                                         Source                                  Freedom Squares            Square          F         Prob -
                                             (1)                                    (2)          (3)          (4)          (5)           (6)


                                         Disinfection                                  1         232.8        232.8      145.90       <.01
                                         Station                                     70          496. 1B         7.1        4.45      <.01
                                         Precipitation                                 1             0.1         0.1        0.09     .770n@.&
                                         Disinfection*prec                             1          72.0         72.0        45.13      <.01
                                         Error                                      527          841.0           1.6
                                         TOTAL                                      6W           1642.8

                                         Partial Sums of Squares

                                         Disinfection                                  1         238.6        238.8      149.61          0 1
                                         Station                                     70          481.1           6.9        4.31      <. 01
                                         Precipitation                                 1          50.0         50.0        31.30      <.01
                                         Disinfection*Prec                             1          72.0         72.0        45.13      <.01

                                                                                                                   ns      not signif icarst




  I
  I
  I
  I
  I
  I
  I
  I
                              A P P E N D I C E S
  I
  I
  I
  I
  i
  I
  I
  I
  1                                    -43-
  1
  I







                                            Appendix I - River Run Data

                    Graph 1.1     Geometric Mean   - Fecal Coliform (MPN)
                    Graph 1.2.. Median             - Fecal Coliform (MPN)
                    Graph.1:..T,.,-Geometric Mean  - Total Coliform (MPN)
                    Graph  L.4'  '. Median         - Total Coliform (MPN)
                    Graph  1.5    Geometric Mean   - Enterococcus
                    Graph  1.6    Median           - Enterococcus
                    Graph  1.7-   Geometric Mean   - E. Coli
                    Graph  1.8    Median           - E. Coli
                    Graph  1.9    Geometric Mean   -,Fecal  Coliform. (mTEC)
                    Graph  1.10   Median           - Fecal  Coliform  (mTEC)

                    Graph  1.11A  Geometric Mean   - Fecal  Coliform, (MPN)  -  Non-disinfection Winter
                    Graph  1.11B  Geometric Mean   - Fecal  Coliform. (MPN)  -  Disinfection Winter
                    Graph  1.11C  Geometric  Mean  - Fecal  Coliform  (MPN)  -  Ratio of Winter Values
                    Graph  1.12A  Median           - Fecal  Coliform  (MPN)  -  Non-disinfection Winter
                    Graph  1.12B  Median           - Fecal  Coliform  (MPN)  -  Disinfection Winter
                    Graph  1.12C  Median           - Fecal  Coliform  (MPN)  -  Ratio of Winter Values
                    Graph  1.13A  Geometric  Mean  - Total  Coliform  (MPN)  -  Non-disinfection Winter
                    -Graph 1.13B  Geometric  Mean  - Total  Coliform  (MPN)  -  Disinfection Winter
                    Graph  1.13C  Geometric  Mean  - Total  Coliform  (MPN)  -  Ratio of Winter Values
                    Graph  1.14A  Median           - Total  Coliform  (MPN)  -  Non-disinfection Winter
                    Graph  1.14B,Median            - Total  Coliform. (MPN)  -  Disinfection Winter
                    Graph  1.14C  Median           - Total  Coliform  (MPN)  -  Ratio of Winter Values
                    Graph  1*11A  Geometric  Mean  - Enterococcus            -  Non-disinfection Winter
                    Graph  1.15B  Geometric  Mean-   Enterococcus            -  Disinfection Winter
                    Graph  1.15C  Geometric  Mean  - Enterococcus            -  Ratio of Winter Values
                    Graph  1.16A  Median           - Enterococcus            -  Non-disinfection Winter
                    Graph  1.16B  Median           - Enterococcus            -  Disinfection Winter
                    Graph  1.16C  Median           - Enterococcus            -  Ratio of Winter Values
                    Graph  1.17A  Geometric Mean   - E.  Coli                -  Non-disinfection Winter
                    Graph  1.17B  Geometric-Mean   - E.  Coli                -  Disinfection Winter
                    Graph  1.17C  Geometric Mean   - E.  Coli                -  Ratio of Winter Values
                    Graph  1.18A  Median             E.  Coli                -  Non-disinfection Winter
                    Graph  1.18B  Median             E.  Coli                -  Disinfection Winter
                    Graph  1.18C  Median             E.  Coli                -  Ratio of Winter Values
                    Graph  1.19A  Geometric Mean   - Fecal  Coliform  (mTEC)-   Non-disinfection Winter
                    Graph  1.198  Geometric Mean   - Fecal  Coliform  (mTEC)-   Disinfection Winter
                    Graph  1.19C  Geometric Mean   - Fecal  Coliform  (mTEC)-   Ratio of Winter Values
                    Graph  1.20A  Median           - Fecal  Coliform  (mTEC)-   Non-disinfection Winter
                    Graph  1.20B  Median           - Fecal  Coliform  (mTEC)-   Disinfection Winter
                    Graph  1.20C  Median           - Fecal  Coliform  (mTEC)-   Ratio of Win-ter Values







                 jGraph I. I                             GEOMETRIC MEAN
                             10000-                          FECAL COLIFORM (MPN)


                                   Drialdig



                              1000-

                      E
                      0
                      0                                                                       oarrent ommisi
                      Z@

                      z
                      0        100-



                      z
                      w
                      Q
                      z
                      0

                                10-



                                               Disinfection BKOMW
                                               10/t/87-4/30/88



                                130              110             90              7'0             50

                                                           RIVER MILES (MID CHANNEL)

                      10   NON-DISINFECTION                         A    SUMMER             x   DISINF EC r
                                         Water Std:@


















                                WINTER                                     1988                    WINTE








              Graph 1.2                                       MEDIAN
                                                          FECAL COLIFORM (MPN)
                         10000-








                           1000-

                   E
                   0
                   0





                   z
                   0        100-



                   z
                   w


                   0

                             10-



                                           Distnfection &cused
                                           10/t/87-4/30/88




                             130             110              90              70              50


                                                        RIVER MILES (MID CHANNEL)

                   0    NON- DISINFECTION                       a    SUMMER             x    DISINI E( rION
                             WINTER                                     1988                    WINTER








             Graph 1.3                               GEOMETRIC MEAN
                                                         TOTAL COLIFORM (MPN)





                         10000-




                  E
                  0
                  0
                          1000-



                  z
                  0



                           100-
                  z
                  w
                  Q
                  z
                  0
                  Q


                            10-


                                                  Disinfectim Ekckmsw
                                                  10/l/87-4/3D/88




                            130              110             90              70               50


                                                       RIVER MILES (MID CHANNEL)

                       NON-DISINFECTION                         A    SUMMER             x    DISINFECTION
                             WINTER                                    1988                     WiNIER







              Graph 1.4                                       MEDIAN
                                                         TOTAL COLIFORM (MPN)



                         10000-







                   E
                   0      1000-
                   0





                   z
                   0

                            100-


                   z
                   w
                   0
                   z
                   0


                             10-


                                                  DisWection RKeused
                                                  lo/l/87-4/30/88



                             1
                              130            110              90              70              50


                                                        RIVER MILES (MID CHANNEL)

                    0    NON-DISINFECTION                        A    SUMMER             x    DISINFECTIO
                               WINTER                                   1988                     WINJER





                                                         low








                 Graph 1.5                                    GEOMETRIC MEAN

                                                                       ENTEROCOCCUS
                              1000








                               1000-
                        E
                        0
                        0





                        z
                        0       100-



                                                                                              EPA recr. sLd
                        z
                        w

                        z
                        0

                                 10-






                                                          DisinfecLion EwAjsW
                                                          10/t/87-4/30/88


                                   130               110                90                 70                50


                                                                 RIVER MILES (MID CHANNEL)

                        0    NON- DISINFECTION                                   SUMMER                x    DISINF Ec ri(
                                  WINTER                                           1988                       WINICR







                  Graph 1. 6                                                     MEDIAN

                                                                                ENTEROCOCCUS
                                 1000









                                  1000-

                          E
                          0
                          0





                          z
                          0         100-



                          z


                          z
                          0
                          Q
                                     10-






                                                                       Disinfection Ewused
                                                                        10/1/87-4/30/88


                                       130                  110                  90                   70                   50


                                                                         RIVER   MILES (MID   CHANNEL)


                            0    NON- DISINFECTION                                    A     SUMMER                  x      DISINI EC 11
                                       WINTER                                                 1988                           WINTER




                                               am       mw-o                                        N-W




                                                                                                             ME we





                 Graph 1.7                                       GEOMETRIC MEAN

                                                                               E. COLI
                               1000









                                1000-

                         E
                         0



                                        EPA recr. std--'@
                         0        100-
                         F-


                         z
                         w
                         Q
                         z
                         0

                                   10-



                                                            DistafecLion EW-USed
                                                            10.1/87-4/30/88




                                     130                110                90                  70                50


                                                                    RIVER MILES (MID CHANNEL)

                         0    NON- DISINFECTION                               A    SUMMER                 x    DISINF EC no
                                    WINTER                                            1988                        WINTER







             Graph 1.8                                    MEDIAN

                                                            E. COLI
                       1000








                         1000-


                  0
                  0





                  z
                  0       100-



                  z
                  w
                  Q
                  z
                  0

                           10-


                                                Distnfection EwusW
                                                10/t/87-4/30188




                            130           110            90             70             50


                                                    RIVER MILES (MID CHANNEL)

                        0    NON-DISINFECTION                     A    SUMMER           x    DISI
                                 WINTER                                 1988                  WI
                                          0__@








                                              No     go    JON,



                                  IMF no WK. no lam aft                                                          so




                 Graph 1.9                                    GEOMETRIC MEAN
                                                                  FECAL COLIFORM (m-TEC)
                             1000




                                         Drinkiig Water Std



                               1000-

                       E
                       0
                       0                                                                                  Qxrent comnisst

                       N,



                       z
                       0        100-



                       z
                       w

                       z
                       0

                                 10-
                                                 Disinfection EKCUBM
                                                 10/l/87-4/30/88







                                   130                110               90                 70                50


                                                                  RIVER MILES (MID CHANNEL)

                              NON-DISINFECTION                              A     SUMMER               x     DISIN[ EC Fl
                                    WINTER                                          1988                        WINTER







           Graph 1.10                                         MEDIAN
                         10000-                         FECAL COLIFORM (m-TEC)





                          1000-

                  E
                  0
                  0
                  Z@
                  4k


                  z
                  0        100-



                  z
                  w
                  0
                  z
                  0

                            10-


                               .4                Distafeetton Exasised
                                                 10/1/87-4/30/88



                             130             110             90               710             5'0

                                                       RIVER MILES (MID CHANNEL)

                   0    NON-DISINFECTION                         6    SUMMER                  DISINF E(JION
                             WINTER                                     1988                     WINTER



                 WWI          low, m                                    a* M,                       0*



                                          Val                     "m



        Graph 1.11A           GEOMETRIC MEAN
                              FECAL COLIFORM WPM

                          NON-DISINFECTION WINTER




                          . .... .. ......
        E
        0
             10000

        z     1000  -

               100  -

                                        IV                      1 or
                 10 -
        z
        w
        0             -      //E@E4
        z         1
        0
                    110   100    90     80    70     @o    @o      4,0
                                   APPROXIMATE RIVER MILE

                    ED LEFT OF CHANPA-DE)            CENTER CHANNEL

                       MID-RIVER                     RIGHT OF CHAN. (NJ)






        Graph 1.1119          GEOMETRIC MEAN
                              FECAL COLIFORM (MPN)

                          DISINFECTION WINTER




        0
        V_  10000 -


             1000 -
        z
        0
              100 -

                          ir                  ir  ir           or 1 or
        z      10
        ui
        0
        z                                                I   I  I  I
        0
                    110   100    90     80     70    60     50    40
                                   APPROXIMATE RIVER MILE


                       LEFT OF CHAN.(PA-DE)          CENTER CHANNEL

                       MID-RIVER                     RIGHT OF CHAN. (NJ)






                                            Am, lift, M Is* as






           Graph 1.11C                GEOMETRIC MEAN
                                      FECAL COLIFORM (MPN)

                              RATIO OF WINTER VALUES



                                ... ......... ...
                      12

                       10-

                       8-

                       6-
                       4_.                                 . . ......-

                       2-

                       0
                          110     100      90      80       70      60       0
                                           APPROXIMATE RIVER MILE

                              LEFT OF CHANPA-DE)             = CENTER CHANNEL
                              MID-RIVER                          RIGHT OF CHAN. (W



                     NOWDISINFECT-WINTER /DISINFECT.WINTER






       Graph 1.12A                     MEDIAN
                            FECAL COLIFORM WPM

                        NON-DISINFECTION WINTER




                           .. ........ .. ..... ...
        E

           10000

       z    10M

             100
       ir
              10
       z
       w
                    __74                        E2
       z           I                                  ' @O
       0                                          @O          40
       0          110   100    90    @o    7'0
                                APPROXIMATE RIVER MILE


                     LEFT OF CHANPA-DE)           CENTER CHANNEL
                  Ell MID-RIVER                   RIGHT OF CHAN. (NJ)





                                              imintm MAMBO






         Graph 1.12B                     MEDIAN
                              FECAL COLIFORM (MPN)

                          DISINFECTION WINTER





         0
              10000

         z     1000

                100
         I-
                                         Z ol
                              IV           IV                     or
         z       10          Zil-  L
         uj

         z
         0
                    110   100    90     80    70     60    60     40
                                   APPROXIMATE RIVER MILE

                    F-1 LEFT OF CHANPA-DE)           CENTER CHAN.
                       MID-RIVER                     RIGHT OF CHAN.(NJ)






                                                          Graph 1.12C                                                                                                                                                                                                                                                   MEDIAN
                                                                                                                                                                                                                               FECAL COLIFORM WPM

                                                                                                                                                                             RATIO OF WINTER VALUES

                                                                                                                                                                                                                                                                               16



                                                                                                                                                                                                   .... ........ . ...................... ..         . . . . . .                                                                                                                                                                                                                                                   .. ..........     ...
                                                                                                                             12


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              .... . ... ......... .
                                                                                                                             10

                                                                                                     0                             8

                                                                                                                                   6
                                                                                                      Ix
                                                                                                                                   4-

                                                                                                                                   2
                                                                                                                                   0                                                                                                                                                                                                                                                                                                                                                       u                          u
                                                                                                                                                                 f                         f                                                                                                                                                                                                                                                                                               I                         I
                                                                                                                                                         110                                               100                                                    90                                                   80                                                   70                                                 60                                                   60                                                    40
                                                                                                                                                                                                                                                                     APPROXIMATE RIVER MILE


                                                                                                                                                                                 LEFT OF CHANPA-DE)                                                                                                                                                                                                               CENTER CHANNEL
                                                                                                                                                    ERA                           MID-RIVER                                                                                                                                                                                                                      RIGHT OF CHAN. (NJ)



                                                                                                                     NON-DISINFECT.WINTER /DISINFECT.WINTER




                                                                                                                         M M sm on, No, '00 AM so,                                                                                                                                                                                                                                                                M M Ift No












          Graph 1.13A
                               GEOMETRIC MEAN
                               TOTAL COLIFORM (MPN)

                           NON-DISINFECTION WINTER



                             ..........


          E
          TO  100000

               10000
          z
          0     1000
                 100-                           z A     oz
          z       10-
                            7 -7

          0          110   100    90    80     70    60     60    40
                                   APPROXIMATE RIVER MILE

                        LEFT OF CHANPA-DE)           CENTER CHAN.

                        MID-RIVER                    RIGHT OF CHANAJ)






        Graph 1.13B        GEOMETRIC MEAN
                           TOTAL COLIFORM WPM

                        DISINFECTION WINTER




        0
        TO 100000

            10000-
        z
        0    1000-
             100  -     I X/
        Ix                             ir                  I
        z     10  -             V4- r /4-         74/      1
        w

        0         110   100   90    so    70     60    50    40
                                APPROXIMATE RIVER MILE


                     LEFT OF CHAN.(PA-DE)        CENTER CHANNEL
                     MID-RIVER                   RIGHT OF CHAN. (NJ)



                               M,                                          m Mill                                                on



                   Graph 1.13C                              GEOMETRIC MEAN
                                                           TOTAL COLIFORM (MPN)

                                              RATIO OF WINTER VALUES



                                               ..........    . ................
                                 12


                                                   .......... .. ..................... . ...... .. ......... ... .... .... . ... ........... ............ .. ......
                                 10


                                                                                        .............
                           0       8-
                                   6-                  . .......                                                .. . .. ...............
                           cc


                                   2-

                                   0-
                                         110          100          @o            80           70           60            50           4
                                                                    APPROXIMATE RIVER MILE


                                               LEFT OF CHANPA-DE)                                       CENTER CHAN.
                                               MID-RIVER                                                RIGHT OF CHAN. (NJ)



                                NON-DISINFECT.WINTER /DISINFECT.WINTER






        Graph i.14A                    MEDIAN
                            TOTAL COLIFORM (MPN)

                        NON-DISINFECTION WINTER



        E
        0
        0   100000

             10000-
        z
        0     1000-
               loo -
                            IV       IV
        z       10 -
                                E2,
        z        1                 1
        0          110   100   90    80     70    60    50    40
                                 APPROXIMATE RIVER MILE


                      LEFT OF CHANPA-DE)          CENTER CHANNEL
                                                   GHT OF     (N
                      MID-RIVER                   RI      CHAN. J)







                                                           to ow






        Graph 1.14B                    MEDIAN
                            TOTAL COLIFORM WPM

                        DISINFECTION WINTER



                         .... . ....... .................. .



            100000-

             10000-
        z
        0     1000-
              100 -
        W.
        z      10
        LU
        0
        z
        0          110   100   90    80    70    60    60     40
                                APPROXIMATE RIVER MILE

                      LEFT OF CHANPA-DE)      = CENTER CHANNEL
                  EM MID-RIVER                = RIGHT OF CHAN. (NJ)






                  Graph 1.14C                                               MEDIAN
                                                        TOTAL COLIFORM (MP

                                             RATIO OF WINTER VALUES



                                                                          ... ......... ....... ......      .... ....... .... ......
                                   12


                                        ... . ................ .     .......... . .. .........  ....... ....
                                   10


                                              .......... ................ ...... . .... ...... .. ............. . ..... .-
                                    8
                             0
                                    6-
                             Ix                    . ....... .. ..... ....                     .......... ......... .. .............. ...


                                    2-

                                    0
                                         110        100         90         80          70         60          50
                                                                APPROXIMATE RIVER MILE


                                              LEFT OF CHANPA-DE)                               CENTER CHANNE
                                       PEI    MID-RIVER                                 M RIGHT OF CHAN.



                                NON-DISINFECT.WINTER /DISINFECT.WINTER



                                                                                so,             M, .10
    mm,mmm mm M mom



  m@MIMI@@mmoom                                no =mamma


         Graph 1.15A          GEOMETRIC MEAN
                                    ENTEROCOCCUS

                          NON-DISINFECTION WINTER




                           ........ ... .... . ...........
         E
         0
         0
              10000

         z     1000
         0
         !R     100
         z       10           ir
         w
         z                            ::Z@
         0       . 1                     1
                    110   100    90     80    70     so    60     40
                                   APPROXIMATE RIVER MILE

                       LEFT OF CHANAPA-DE)           CENTER CHANNEL
                       MID-RIVER                     RIGHT OF CHAN. (NJ)






         Graph 1.15B          GEOMETRIC MEAN
                                    ENTEROCOCCUS

                          DISINFECTION WINTER




                           . ......................... . ......... ..... ..... . ... .. ....
         E
         0
         0
         V_   10000


               1000


                100

                                           IV IV lv_w IV w w wn w
         z       10                       /1 L_/l /11- 11 AL n /I /I n /1 11 A
         w                                     /"::td-          rt
         0                   /                   z U  U    I/ LiU
         z
         0
                    110   100    90     so    70     60    60     40
                                   APPROXIMATE RIVER MILE

                       LEFT OF CHANPA-DE)            CENTER CHANNEL
                   EM MID-RIVER                     -RIGHT OF CHAN. (NJ)
                   ./            i                      I













                                            Graph 1.15C
                                                                                                                                    GEOMETRIC MEAN
                                                                                                                                                            ENTEROCOCCUS

                                                                                                       RATIO OF WINTER VALUES

                                                                                                                                                        is 17          is fro
                                                                                                             ........ ....-.... .... .......                         Ilk
                                                                           12

                                                                           10

                                                                               a-
                                                                0
                                                                1@             6-
                                                                               4-

                                                                               2-                                                                                                                                                                Jim m
                                                                                                                                                                                                                                                   F.- 1
                                                                                                                                                                                                                                                 410 z E
                                                                               0
                                                                                           110                         100                           90                           80                            70                           60                           60                           4
                                                                                                                                                       APPROXIMATE RIVER MILE


                                                                                                        LEFT OF CHAKIPA-DE)                                                                                                          CENTER CHANNEL
                                                                                                        MID-RIVER                                                                                                                    RIGHT OF CHAN. (NJ)



                                                                       NON-DISINFECT.WINTER /DISINFECT.WINTER












          Graph 1.16A
                                               MEDIAN
                                         ENTEROCOCCUS

                              NON-DISINFE,CTION WINTER



          E
          0
          0
          V_   10000 -
          N%
          z     1000 -

                 100 -
                                               /I      /in won
                                                 m r m  0 ZH-JL-,e 10  1
                                                 ir w   irlu w w Irn or W
                  10 -           AV                                  I u-/Ir-n /I /
          z                                                          ir w IF
          ui

          z
          0
                       110    100     90     so      70     60     so      40
                                        APPROXIMATE RIVER MILE


                           LEFT OF CHANPA-DE)               CENTER CHANNEL

                           MID-RIVER                        RIGHT OF CHAN. (NJ)





          Graph 1.16B                          MEDIAN
                                        ENTEROCOCCUS

                              DISINFECTION WINTER




                             . ......... ............ ......... . .....
          E
          0
               10000

          z     looo.-
          0
          IR     100  -      A
          m                   E/ 0/19    m/  0  0   ItZ ï¿½-/H-m 0   1  E/
          INNIN                    IN IN            w Pro a           w fir
          z       10

                                                                       Is
          z                                   0     ;o
          0
                       110    100    90                     60      0     40
                                       APPROXIMATE RIVER MILE


                           LEFT OF CHANAPA-DE)              CENTER CHANNEL
                      EM MID-RIVER                          RIGHT OF CHAN. (NJ)






         Graph 1.16C                      MEDIAN
                                    ENTEROCOCCUS

                       RATIO OF WINTER VALUES


                                14 W 6
                               -a,
                12-

                10-
              0  8-
                 6

                 4
                                                  Mal
                 2

                 0
                    110    100    90     80     70     60      50     40
                                   APPROXIMATE RIVER MILE

                       LEFT OF CHANPA-DE)             CENTER CHANNEL
                       MID-RIVER                      RIGHT OF CHAN. (NJ)


               NON-DISINFECT.WINTER /DISINFECT.WINTER



                                                   m m MIMI






         Graph 1. 17A
                              GEOMETRIC MEAN
                                            ECOU

                          NON-DISINFECTION WINTER




                             . . .... . ....
          E
          0
          0   10000

          z    1000

                100


                                       ir IV  IV w
          z      10
                                                            /__w 7 ff,7_
                                                     @O    @O     40
                    110   100    90     80    70
                                   APPROXIMATE RIVER MILE


                       LEFT OF CHANPA-DE)            CENTER CHANNEL

                        MID-RIVER                    RIGHT OF CHAN. (NJ)





            Graph 1-17B             GEOMETRIC MEAN
                                                    E.. COU

                               DISINFECTION WINTER



           E
           0
           0
                10000 -

           z     1000 -
           0
                  100 -

           Ix
           z       10 -                                               /11 Al /m

           z
                        110                                            @o      @o
                                100     90      so     70      60
                                          APPROXIMATE RIVER MILE

                        E__1 LEFT OF CHANPA-DE)                CENTER CHANNEL
                        PEI MID-RIVER                          RIGHT OF CHAN. (NJ)



  mmmmmmm m mmmmm mom


           Graph 1.17C              GEOMETRIC MEAN
                                                   E. COU

                           RATIO OF WINTER VALUES



                              ......... . ..
                    12

                    10
                0    8-
                     6-
                cr.  4-

                     2-
                                               m z
                     0
                        110     100     90      @o      70      60      60      4
                                         APPROXIMATE RIVER MILE


                            LEFT OF CHANPA-DE)                CENTER CHANNEL

                            MID-RIVER                         RIGHT OF CHAN. (NJ)
                       fl     all                 I


                   NON-DISINFECT.WiNTER /DISINFECT.WINTER






         Graph 1.18A                       MEDIAN
                                             E. COU

                           NON-DISINFECTION WINTER




                           . ...........................
          E
          0
          0
             10000


              1000-

               100-

                               or        w w
                10-                        // IV



         0
                    110    100    90     so     70     60    50     40
                                    APPROXIMATE RIVER MILE

                        LEFT OF CHANPA-DE)             CENTER CHANNEL

                        MID-RIVER                      RIGHT OF CHAN. (NJ)






          Graph 1-18B                    MEDIAN
                                           E. COU

                          DISINFECTION WINTER




              10000


               1000
         z
         0
                100

         z       10
         w                                                      /M
                            7-w ir ir ir                        z
                              "I " 41 Z Z Z 7
         z        .1           lu u 7 u 7
         0
                    110    100   90     80    70     60    50     40
                                   APPROXIMATE RIVER MILE

                        LEFT OF CHAN.(PA-DE)     = CENTER CHANNEL
                        MID-RIVER                = RIGHT OF CHAN. (NJ)






         Graph 1.18C                       MEDIAN
                                            E. COLI

                       RATIO OF WINTER VALUES


                12

                10
             0   8-
             !R  6-
             ir  4-

                 2-

                 0
                    110    100     90     80     70      60     50     40
                                   APPROXIMATE RIVER MILE

                        LEFT OF CHANPA-DE)        = CENTER CHANNEL
                        MID-RIVER                 = RIGHT OF CHAN. (NJ)



               NON-DISINFECT.WINTER /DISINFECT-WINTER













             Graph 1.19A
                                   GEOMETRIC MEAN
                                 FECAL COLIFORM (M-TEC

                               NON-DISINFECTION WINTER



           E                   . ........ ..            .. ......

           0
           T_  10000 -

           z    1000 -

                  100 -
                               K                                          z
           z       10 -       A                                            IV
           w                 ol
           z                        EZ
           0
                        110    100    9 0     a0     70      @o     @o     @o
                                        APPROXIMATE RIVER MILE

                           LEFT OF CHAN.(PA-DE)         = CENYER CHANNEL
                           MID-RIVER                    = RIGHT OF CHAN. INJ)






            Graph 1.19B    GEOMETRIC MEAN
                         FECAL COLIFORM (m-TEC)

                        DISINFECTION WINTER



        E

             110000-

        z     1000-
        0
               100-

                                          w        or    w w
               10 -
        z
        w

        z
        0
                  110   100   90    80    70    60    50    40
                                APPROXIMATE RIVER MILE


                     LEFT OF CHANPA-DE)         CENTER CHANNEL

                     MID-RIVER                  RIGHT OF CHAN'L (NJ)






            Graph 1.19C       GEOMETRIC MEAN
                            FECAL COLIFORM (M@TEC)

                       RATIO OF WINTER VALUES


                 12         .............. 35

                 10

             0   8-

                 6-
             cc
                 4-

                 2
                                                      7Zm
                 0                                             oc
                    110    100    90      80     70     60      50     40
                                   APPROXIMATE RIVER MILE

                       LEFT OF CHAN.(PA-DE)       = CENTER CHANNEL*
                       MID-RIVER                  = RIGHT OF CHAN. (NJ)


               NON-DISItIFECT.WINTER /DISINFECT-WINTER













           Graph 1.20A
                                              MEDIAN
                               FECAL COLIFORM (m-TEC)

                             NON-DISINFECTION WINTER




         0
         0
              10000 -


               1000 -


                100
                 10          ir ir          ir ir  ir  ir                Ir
         z
         w


         0
                      110    100    90      @o     710    60      60     40
                                      APPROXIMATE RIVER MILE


                          LEFT OF CHANPA-DE)              CENTER CHANNEL

                          MID-RIVER                       RIGHT OF CHAN. (NJ)




                 m Will m           m






           Graph 1.20B
                                             MEDIAN
                              FECAL COLIFORM (m-TEC)

                            DISINFECTION WINTER





              10000

         z     1000
         0
         !lz    loo -               On/
                                                  or            or w w
         z       10 -                                              /I /a
         LU                                                       X
         0             u                                     7 7
         0            110   100     90     80     70     60     60     40
                                      APPROXIMATE RIVER MILE


                         LEFT OF CHANAPA-DE)             CENTER CHANNEL
                         MID-RIVER                       RIGHT OF CHAN. (NJ)






                                         Graph 1.20C                                                                                                                                      MEDIAN
                                                                                                                             FECAL COLIFORM (m-TEC)

                                                                                                        RATIO OF WINTER VALUES

                                                                                                                                             2.4 Is         41 "           25 Ila


                                                                                                           ....... ...        ....... ......
                                                                          12

                                                                          10


                                                           0
                                                                              6-

                                                                              4-

                                                                              2-

                                                                              0
                                                                                           110                          100                             90                             80                             70                             60                             50                             40
                                                                                                                                                          APPROXIMATE RIVER MILE

                                                                                                         LEFT OF CHANPA-DE)                                                                                                                  CENTER CHANNEL
                                                                                       Ell               MID-RIVER                                                                                                                          RIGHT OF CHAN. (NJ)


                                                                     NON-DISINFECT.WINTER /DISINFECT.WINTER





                                         Appendix II  - Shellfish Area Data
                     Graph  2.IA   Geometric Mean     -Fecal COlifOrm  (MPN)     -Non-disinfection Winter
                     Graph  2.IB   Geometric  Mean    -Fecal Coliform: (MPN)     -Disinfection Winter
                     Graph  2.1C   Geometric  Mean    -Fecal Coliform  (MPN)     -Ratio of Winter Values
                     Graph  2.2A   Median             -Fecal Coliform  (MPN)     -Non-disinfection Winter
                     Graph  2.2B   Median             -Fecal COlifOrm  (MPN)     -Disinfection Winter
                     Graph  2.2C   Median             -Fecal Coliform. (MPN)     -Ratio of Winter Values
                     Graph  2-3A   Geometric  Mean    -Total COlifOrm. (MPN)     -Non-disinfection Winter
                     Graph  2-3B   Geometric  Mean    -Total COlifOrm  (MPN)     -Disinfection Winter
                     Graph  2.3C   Geometric  Mean    -Total Coliform  (MPN)     -Ratio of Winter Values
                     Graph  2-4A   Median             -Total COliform  (MPN)     -Non-disinfection Winter
                     Graph  2.4B   Median             -Total COliform  (MPN)     -Disinfection Winter
                     Graph  2.4C   Median             -Total COliform: (MPN)     -Ratio of Winter Values
                     Graph  2.5A   Geometric  Mean    -Enterococcus              -Non-disinfection winter
                     Graph  2.5B   Geometric  Mean    -Enterococcus              -Disinfection Winter
                     Graph  245C   Geometric  Mean    -Enterococcus,             -Ratio of Winter Values
                     Graph  2.6A   Median             -Enterococcus              -Non-Disinfection Winter
                     Graph  2.6B   Median             -Enterococcus              -Disinfection Winter
                     Graph  2.6C   Median             -Enterococcus              -Ratio of Winter Values
                     Graph  2.11A  Geometric  Mean    -Fecal Coliform (MPN)      -Transect River Mile 48
                     Graph  2.11B  Geometric  Mean    -Fecal COliform (MPN)      -Transect River Mile 46
                     Graph  2.11C  Geometric  Mean    -Fecal Coliform (MPN)      -Transect River Mile 43
                     Graph  2.11D  Geometric  Mean    -Fecal COliform (MPN)      -Transect River Mile 40
                     Graph  2.11E  Geometric  Mean-   Fecal  Coliform (MPN)      -Transect River Mile 37
                     Graph  2.11F  Geometric  Mean    -Fecal Coliform (MpN)      -Center Channel Profile
                     Graph  2.11G  Geometric  Mean    -Fecal Coliform (MPN)      -N.J.(East) Shore Profile
                     Graph  2.11H  Geometric  Mean    -Fecal Coliform. (MPN)     -Delaware (West) Shore Profile
                     Graph  2-12A  Median             -Fecal COliform. (MPN)     -Transect River Mile 48
                     Graph  2.12B  Median             -Fecal Coliform (MPN)      -Transect River Mile 46
                     Graph  2.12C  Median             -Fecal Coliform, (MPN)     -Transect River Mile 43
                     Graph  2.12D  Median             -Fecal Coliform (MPN)      -Transect River Mile 40
                     Graph  2.12E  Median             -Fecal Coliform. (MPN)     -Transect River Mile 37
                     Graph  2.12F  Median             -,Fecal Coliform (MPN)     -Center Channel Profile
                     Graph  2.12G  Median             -Fecal Coliform. (MPN)     -N.J. (East) Shore Profile
                     Graph  2.12H  Median             -Fecal Coliform (MPN)      -Delaware (West) Shore Profile
                     Graph  2.13A  Geometric  Mean    -Total Coliform (MPN)      -Transect River Mile 48
                     Graph  2.13B  Geometric  Mean    -Total Coliform (MPN)      -Transect River Mile 46
                     Graph  2.13C  Geometric  Mean    -Total Coliform (MPN)      -Transect River Mile 43
                     Graph  2-13D  Geometric  Mean    -Total Coliform (MPN)      -Transect River Mile 40
                     Graph  2.13E  Geometric  Mean    -Total Coliform, (MPN)     -Transect River Mile 37
                     Graph  2-13F  Geometric  Mean    -Total Coliform (MPN)      Center Channel  Profile
                     Graph  2.13G  Geometric  Mean    -Total Coliform (MPN)      N.J. (East) Shore Profile
                     Graph  2-13H  Geometric  Mean    -Total Coliform (MPN)      Delaware (West) Shore Profile
                     Graph  2.14A  Median             -Total COliform (MPN)      Transect River  Mile 48
                     Graph  2.14B  Median             -Total Coliform (MPN)      Transect River  Mile 46
                     Graph  2.14C  Median             -Total Coliform (MPN)      Transect River  Mile 43
                     Graph  2.14D  Median             -Total Coliform (MPN)      Transect River  Mile 40
                     Graph  2.14E  Median             -Total COlifOrm (MPN)      -Transect River Mile 37
                     Graph  2.14F  Median             -Total COliform (MPN)      -Center Channel Profile
                     Graph  2.14G  Median             -Total Coliform (MPN)      -N.J. (East) Shore Profile
                     Graph  2-14H  Median             -Total Coliform (MPN)      -Delaware (West) Shore Profile






                                                                                                                                                                               Graph 2.IA





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                Graph 2.11A                                 GEOMETRIC MEAN
                                                           FECAL COLIFORM (MPN)

                                          CONCENTRATION (#/100ml)
                                  100     ----------                                                 ....... . ... . . . .............. . ..... ........ ................... ......... .
                                                                                                      . ... . .. . ........ . .................... -.- ..............  ...........

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                Graph 2.11B                                GEOMETRIC MEAN
                                                          FECAL COLIFORM (MPN)

                                        CONCENTRATION (#/looml)
                                 100                                              ......... ......  .......
                                                                                                             ............I.... ..... . . ............ ...... ......
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                Graph 2.11C                                 GEOMETRIC MEAN
                                                           FECAL COLIFORM (MPN)

                                         CONCENTRATION (#/l00MI)
                                  100                                      ..... .... ....    . .. ............
                                               ------- ----------       . .. . . .......... ...........-
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               Graph 2.11D                                  GEOMETRIC MEAN
                                                            FECAL COLIFORM (MPN)

                                         CONCENTRATION (#/100ml)
                                  100                                                . ... ............. ..... ..... ...
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                                    10
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                 Graph 2.11E                                  GEOMETRIC MEAN
                                                              FECAL COLIFORM (MPN)

                                           CONCENTRATION (#/100MI)
                                    100
                                                                      ................. ...... .. . .. . .......... - ------ - ---------- ---- -
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                Graph 2.11F                               GEOMETRIC MEAN
                                                          FECAL COLIFORM (MPN)

                                        CONCENTRATION (#/100MI)
                                 100
                                                                  -.... .. ......                           .. .... . . ......*. . ..........
                                                                 ..................                                          .............. ...I..........
                                                             .......... 11 ............. . ..... . ....                              ......... *,.,


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                                   10 -.7 ..........
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                  Graph 2.11G                         GEOMETRIC MEAN
                                                      FECAL COLIFORM (MPN)

                                   CONCENTRATION (#/100ml)
                            100                               --- -- -- -------- =-- ... . ............ . . ... . ................. ...................... .... . ... .*-,--,* .................... ..... . .. . .
                                                                         . . . .. ..........*......... . ...    ------------ .. .. . .......... .
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                                                              APPROXIMATE RIVER MILE


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                Graph 2.11H                             GEOMETRIC MEAN
                                                       FECAL COLIFORM (MPN)

                                      CONCENTRATION (#/100ml)

                                                                          .... ........ . .... . ................. ............ ....... ..................
                              loo.:@@   ------ - -----           . ..................                  . . ...... . ...
                                         .... . ..............   ...... 1--l....-.- ............. .....           .......       . .....
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                                                                 APPROXIMATE RIVER MILE


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                Graph 2.12A                                                        MEDIAN
                                                             FECAL COLIFORM (MPN)

                                          CONCENTRATION (#/100ml)
                                   100                       - - ---------- ---- ----------
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                                     10
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               Graph 2.12B                                                       MEDIAN
                                                           FECAL COLIFORM (MPN)

                                         CONCENTRATION (#/100ml)
                                  loo    -- ---------                   ......  .......... ..- ....... ......... . .... .. ... ..  ---------------
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                                                                 . .. .......                   ........ .................. .  . . .... ........... ..-

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                 Graph 2.12C                                                         MEDIAN
                                                             FECAL COLIFORM (MPN)

                                           CONCENTRATION W100MI),
                                    100
                                                                                                                            -------- --
                                                                                  ............... . ............ .. ....... ... ..........
                                                                   ............... .......... . .......... . ....... .. ................ . ...... . ..... .- ................... .............. ....... ............. . . . ....... ......... . ........ ......... . .... .
                                                                                                                                     ..............

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                                              .. ...... ............... .............. ....... ........ . .......-.......... ...-... . .... . .....................  -.1-1-- ............ ........................ . ......1 1- .. ......... ................ .............................I........ ................... ...I. ...........



                                           .... . ................. .. .......... .................. . . . . ............... ............................. . ................ .. ......... . ..I...... .........I......... ... ........... ............... ........ . ... . ......




                                      10
                                                                                  ..........
                                           ..... ... . ....... . ......... ........ ... ............ . ...... ............... ......... . ..................... . ....... ....... ............ . ........................... ... ..... . ... -.- ..... ...................... . ..............

                                              ........ ..... ........... .................... ......  ........................ . ............. ....... .... .... . ......... . ..................... ....................... ... ... ......

                                           .......... .. .... . .... . ... ...................I............... ............. ............ . .. . ....... .I..... .. . ..... ..... ................... . .... ......... . . ................. .......... . ................ . ..... . ... ..........

                                           ........... ... ............. ...... . ........................ . . . . .. .............. ... . .-. ............-- 1-1-11- .. ............. . ............I. . ............. ..... .... . . .. . ......... ...............................................


                                           .............. .......... ..... ................ ..... . . .. ... . ...... .... . ....... .. ..........I ..... . .. ............. . ............. . .......... . .. .. ..... . . ... ....... ....... ..... ....... ...........



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                Graph 2.12D                                                       MEDIAN
                                                            FECAL COLIFORM (MPN)

                                         CONCENTRATION (#/100ml)
                                  100                              .. ........... .... -.
                                                   . . . . . ................ .... ..... . ....... . .. . .....*. ..... ......... .. ..
                                                                                                                           . ...... .....

                                            --------- . . . . .. .. . ............... .. .. . .................. ............. .. .. . .......... -.- . ........- .......... . ..........
                                                                               .... ....... ...... . ..... .................. . ...... . .. .... ....... :@@ ... .... ................... 1-1-1 ........ ..... .. .................. ............. .......... ..

                                         ......... . ...... . ...... ... . ..... .. .............. ..... ................................. ..... .. .. . .................... ..... . ......... . ............-........... . ............ . .......... ................ . . .............. ..... ... . ....................... ---- . ...... . .........


                                         ..... . ............... . . .. ........ . . ....... . ......... . ............. . ... . ...... . .... ..... ....... ........... ....... . ........ .. .. .. ...........-.......... . .. ... . ... . ...... ............. ..................... ....... . .. . .. .......... ...................



                                             ............................... . . ......... .. .. ..... ........ -- ... . .... . ................ ............ .. ...... . ...........I................. ................... .. ........ ... ......... ...... ............ ... ...... ............. . ............. .. -- ....................... .....


                                    10           ................. . . .. *-",-*"*"".-.: . ....... . .. *"",-,-"* ....... ... . ....... ...
                                         . ........ ...... . ..... .......... ........ . . . .... ............ ... .. .... . . ..... .... .... .. ........... ..... .... ........ .. ................ . .. .... .. . .. . .... ............... ........... .. .. ....
                                         ......... . .... ..... ........... .............. --  ...... . ......... . ...... -- :@:, ................. . . ......... .... .. .... ... .......... -------------*............ .*,-"",.-. . ......... . ..............

                                          ......... ..... .... ..................................... . .....I............ ....... ... ..... . .........  1--1---.- .... ...... .... . .................. ........ ..... .. .. ...... .. ............ .............. ...... ........... ...... ...........

                                            . ............... .. . ................. -1-1-- ..................... ..................... ............ ............ .. . .............. . ..... .... ...... ............... .. .. . . . .....................


                                            ...... .. ..... .............. ............ ....... ...... .............................. ... ..... .. ........... .......... ... .......-........ . ... .... ...... . ....... . ................ . .. . ............. --- .............  1-1--l



                                         ....... ...... .. ..... . ....... .. ......... . ....... .......... ... .................. ... ........ .. ........ .......... .......... . ....




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                 Graph 2.12E
                                                                                 MEDIAN
                                                           FECAL COLIFORM (MPN)

                                         CONCENTRATION (#/100MI)
                                  ioo_...-  ----------------
                                          -------------------    ......... ........... *..----,.,--,- ....... .. ... ....... .....
                                         --------------
                                                                                        --- - ------------------ *-,*:"*"-,*** ......... .
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                                          ......... ....... ........... .... . ....  ......I. . . ........... ........ . .. ............. ............................. ..  ........ . ......... ...................... .......... ... ..... ...... . . ... . .... ....................



                                         ----------------    . ... .......... . ... . ..... ..... ....... ... ............  ....... . ..... ........ ........I...... . ........... ........... ... ............. .... ....... ....... .............






                                         . .. .........I. ........ ........ ........... . ....... ... ..............I.. . ................. .. ... . .......
                                         ........... . .......... ....... . ........ ... . ...... . ...... ... ...... . ............. .... ... . .... . ......
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                                         . .. ............... ........ ..... ........ . ...........I................. .. ............... .. .. ..... .. . .. .. . .......... ............. .......... . ................

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                                         ...... . .....-. ..... . ............. .... . ...... ........... . ........... .. ... . ..... .......... ........ ... .. .. .. ......... ....... .. ... . .......... ..... . ............ --.- ............ ..



                                                                                                                     ... . ........ . .. ......... .... ........... ......... ....





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                Graph 2.12F
                                                                               MEDIAN
                                                        FECAL COLIFORM (MPN)

                                      CONCENTRATION (#/100ml)
                               10 0                                                                        . ... ..... ...... .........
                                                                                                       ....... ... .... .... . ........... ..... ..... .............I.... . ..... ........ ..... ......
                                                                        .. .......... .. ........ *-.,,.-..,--.'.- ..........*..........
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                                             ------------ . . . ... ..... . .................... ................. ..... ..... ....... ...... ....... .......... ........ . ........... .... . ........  .......... . ...... ... ... . ............... . ............... ...

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                                      . ..... ..... --.- . .......... . ... . ............ . . ... ........ . .. ................ . . ....... ...................... --.- .................. . . . ... ......... -..- ..................... ..................... ...... ............... .................... .........  .......


                                 10 -                   . ...........k  .... ....... .. ........ . .... .................... .... .................. .I..............
                                             ...... .....*----- ----    .......... ....... .......... ........................ .. ................
                                             .. ........ ............... --.--                             ::" * ------------- *** ............. *-"* . .......... ...... .. ........
                                           . .................. ...... . ........... ........... .................. .. ...... ... ..... .... ... ................. ..... ............ @L:  ..........**---:-:'@@:'@'*. . .. . . .. ..
                                      . ............ . .... . ..... ........... . ............................. . ................ . ........ ...... .......  -... . ..............  ....................111- ......... .. ..... ......... . ............. . ....... .. . ..........
                                        . ................... ..... .. ............... . ....... .......... . ....-. ..... . ......................... ....... ...... ............. .... .............. ............ ...... ..... .......... ......... .............. ........... ..... .... .................. . ...........

                                             .............. .. . ----I... . ............... .................... ........ .. ... .. .......... -- .. .... .............. ..


                                      . ... . .. ... ...... .. ........................ .......................... . .... . ....... . .......... ..... . .... .............................. --- .............. .. .......... . ... . ...... ..................................... ... .... .. ..... ....... ............ . .....


                                      . .......... . ... ..... --.- ............... . .. ..... ......... ............................... ....... .. .. ....... ....................... .............. .... ........ .................... ......... .... ........... . ................ ...................... ........ .............. ...I.............. ...




                                    49       48      47      46        45     44        43      42       41        40     39      38
                                                                 APPROXIMATE RIVER MILE


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                         CENTER CHANNEL PROFILE












                Graph 2.12G
                                                                              MEDIAN
                                                        FECAL COLIFORM (MPN)

                                     CONCENTRATION (#/100ml)
                               100         ---------
                                                       . . . . . ........ . ............ . ..... ........ ................................... . .... ::.- . . ..... . ..................I............. .... .. ................... ..... ......... .... . . ...
                                                 . . . . . . . . ............... ...... ............. .............. ............................ *..'.@:@::@:::::@@:::::_::@:@:@::::@,::@:::::@.@:'*  ............. -- ...... ..... ...... ....

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                                       ........................ ............. ........... .. ... . .. ............................ ....... ...........  --- ... . ......... ........... ....... ........... ..... ................ .


                                        ............. ........ ........................... . ... ............... ....... .. ..... ........... ... ................... .............  -- . ................... . ..................... .... . .... . .................. ..........  .......... ................ . .........


                                        ... .................... .................. ... ........ ... ...... ....... . ...... ...................... .-. . ............. .. . .... .. .... ............. .............. ............. . .............. . ...  ........... .. ............. ... .............. .....................


                                 10::-:-* ........ . . .. ......... ........ . . ..... ........ . . ....... ... .............. . .. ............. .... @::: ..................................... ............... . ..I............  .............. .. . ............ ...... . . . ....... ..... . ....
                                                                                              ...............-...... ... .. :: . ........... ........... . ....... . ........  -.1 ............ .
                                                  ........ ..       ------------- ......... ... ......      .. . ...........   .........
                                                          ..... ... ... ......... .......... . .......... ............  .......... ...... . . ....... . .......... ................... ... .......... .-.......... .......... . ...... . ... ....... ......

                                      . ............. ....... . ... .... . ..................... . . .. . ..................... -.-  ..........-........... . .......... ............... ........... ..., ....... ....... . ..... ....... .. . ......... .... .......................... -- ..... . ... ............-.................... ..

                                               ... . ................. .-.. . ....................... ................ .......... ........... ................................... .. .............. .... ..... ................................... . . .....-..............


                                                                                 ...................- ......... .. ....... . . . .. .. .. .. ..................... ....................-
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                                             . .......... ... .... ......................... ................ ....... ....... .. . ......... .




                                    49      48       47       46       45      44       43       42      41       40     39       38
                                                                 APPROXIMATE RIVER MILE


                                                  NOWDISINFECTMINTER                                    DISINFECTION WINI


                         NEW JERSEY (EAST) SHORE PROFILE






               Graph 2.12H                                                     MEDIAN
                                                       FECAL COLIFORM (MPN)

                                     CONCENTRATION (#/100ml)
                              100                                 ... . . .. .................. . .. .. ...... ..... .................. .. . ....... ............ -.., . . . ............. ......... ...... ...........................
                                                                      ......... .. .. ...... .......... ............ ....... ..... .I....... . .. .............. ..-...... ........ ... ...... ........ ... ........... ..

                                                          ......... ............. . ........
                                                                  .... .. ....
                                                           . ......... ... ..... .... -.- . . ................*. ........... ... . .....*. ........ .. . .. --- . ........ .*"'* .... . ..... . ... ....... .. .. . ........ .
                                     . ............ .......... ......... .... ......  ..- . ..... . ... . ... . .... .. . .................. -- ... ........ .. ...... ....... -..- ... .... ... ........... -- ............. ... ............ ..

                                         ...... ....... . .... . ... .......... ................... . .............. ...... . ....I........... ...............I-............. . . .. ................- ........... .... ........ .............. .... .............. . .. ......... .......-......... .


                                         ......... ... --.1- 1--.1 ..... ......... .......... . ........-. .... ......-............. . ....... . ... .................................... -- ............................ .............. .. .


                                     . ................ ................. . ..... . .... . ............... ............. ....... . ...................-.... ... . ............ ...... ....... .................................... ... .... ..... .................. .... .. . ... ...



                                10                                      . ......  .... ........... . .... . ...... .-........ ............................ . ... .........
                                                                        . .. ... ........-. ....... .      .. ................ ... ... ....... ................
                                                                                                      .. ................ .......... . ........................... . ............ ...... . . .............
                                                      .............. "..** ... ... .... ...... ................... ....... . ...... . ... . . ... . ... . .. ........-
                                                                  ... ........ ............. .. ...................... ............. ........... .... .............
                                                      .......................... *..".. ...........*........... . ...................... .............. . ... .... ......... . ..... .................. ... . ... .............. . ........ ............ .......... .. ...... ......... . ......... . ... .........
                                     . ..... ... ...... ............ . ... ........... .......... . ....-.............................. ....................... .. ......... . ................. .... ............... .............. ................... . . ........ ........................... ...... ...... .. . .....  I..-.-
                                                 ...............  -- ........ ...  .................... ................................. -.- ................. . ......... .... ---- ...... .........i.... ... . ............

                                     . ......... ........... .......................... ................ . ........... ....... ..... .. ..... . ...... ..... . ......... . ................ . . ....... ..................................... .... . . .. .... ............... ............ .... . .............. ......... .


                                         ........ ... ... .. ................................ .. . ............ ............................. ................. .... ........ ....... .. .. ...... . ............... ....... . . ... . ................ ..................... ..... . .. .........




                                   49       48      47       46      45        44       43     42          41   40       39      38
                                                                  APPROXIMATE RIVER MILE


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                        DELAARE (WEST) SHORE PROFILE



                                                                                                                M RW ML






                 Graph 2.13A                                   GEOMETRIC MEAN
                                                               TOTAL COLIFORM (MPN)

                                             CONCENTRATION (#/100MI)

                                                                                                         ...... . ................. .............. .... . .......
                                                                                                 ..........  .......... ::::-: ............. ...... - ------------ -- --------- --------
                                                                                         ...............-.. .. ......................*... ....... . ..... ....... . . ........... .. . . . ......... .
                                                                      ...... . .. .....................
                                                                                                 ...... . . . .............. ... .. ... ........ . ................. .
                                                                                                             .......... .. ........... . ....... . ... ....... ........... ....... .. ..........

                                             .... . ..................... .......... . . ................ ........ ........... ............ . .......... ......... ....... .. ........ ......... ........ .............. ............... ..  :.-.- ............ .... . .....  ..............

                                             ............................... ........... ...... . .............I.. ............. ...... .. ...... .... . ... . ............... ..................... . ............... ............ ............ ... ....................


                                      ioo::::-:
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                                             .... ....... ......... . .. ..... ..... ... ... :** .:
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                                             . . ........ ..................... .... ....... .I....... . .................. ..... ............. ... ........ . ........


                                               ........ ............ ...........I...........I.... ................. . .......... ................ ......... ..... ........ ....... ................. .................... .......................... .. . .................... .... ........... ..


                                        10   . . .... ............. ...... ..... ..... .....                                     -*.",*--,.-:-,...'* ...... ....*
                                                           ...... . ......... . ....... . .. .............. .:.. . . ...... . ...................... ...... . .... .......... ..... .. ... .
                                                           ................................... . ........ . ... . ....... . ... ......... .... . . ............... . ........................ ...... . ....... . .........I................. . .. .. .. .... .. . .............
                                             .... ... . . . ..... ........................ .......................... . .......... . .............. . .. .......... . ........................ .................. .............. . ....... . . .. .......... .... . ...................... . ... . ... . ............. .....
                                             .............................. .......... ........ ....II...........I -............. ............... ... . ..................... ............. ........ . .. ..............

                                             ..... ...... ...I.... ............ .. ... . ......I.......................... ...................... ...... . ........ ..... ..... .................... . ........................ .. . ............ ... ... ..............-............... . .


                                             ... . ............... . ..........I............ . ........... ............... ... . ................ . . ............... ............. .... ..................... . ... .......... . ...... ........ .. . ............. ....... ........................... . .................................... ......... . .. ........



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              Graph 2.13B                                    GEOMETRIC MEAN
                                                                    TAL COLIFORM (MPN)

                                           CONCENTRATION 4/100ml)
                                  1000                                                   .......... .
                                                                                              ..... . ........... . ............
                                                                      ............       ..... . .. .. . .......
                                                - -----------         ................ .                         ....... ...........

                                                               . ........... .... ...... .


                                                ... . .................        . ..... .. ......... ....................... ............. . .............. . ...



                                    100
                                                                                                                    ....... . ............
                                                ....... . ...*-------
                                                .. ....... ..... . ... ..... ..... ................. . ....... ... . . . .............
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                                                  .......... -- .. ....... . ............................. ............ .... ..... .......

                                           .... . .. .. ........................ ............. ................. ............ . ................... .. . .... ........... . . ..... .....
                                                                i
                                           ... ........I.... ....... .......... . .. ............... ..... . ..........




                                                      ---- ------- -- - - -------- - --------------------------

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                                                                   .. . . .... . .. ..................... . .. ... ..........

                                           ...... ....... . ......... . .......... . .....I...... .. ...... . .. ........... .................. .................. ........

                                            ............................ . . . ....... -- ... .. ......... ..... ..... ....... .. ... ............................. ....... ... ........ ........ ....... ..... ....... ... .......


                                            ...... .... ....... . .. ............ .. .. ............ . ...... ................. . ..... ................ . ..... . ........................... ............... .. . ...........



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                            TRANSECT APPROXIMATE RIVER MILE 46



    mmmIIIIIIIIlmmm m m mmm@mmm





             Graph 2.13C
                                                            GEOMETRIC MEAN
                                                           TOTAL COLIFORM (MPN),

                                          CONCENTRATION (#/100MI)


                                                                                                             -- - - --------------- . .................. .. -------


                                                                  . .. ............ . ...... . ... .. . ..... ......... . . ....... ....... . ............ ..........

                                          ....... ......                  .... ......... ..... . .. .......... .... . .......... . . .. .. .. ...... . ........ . .............. ..... . ................. ..... ...............


                                          ................ ...... ............... ........ .... .. ............... ...... . ............ . ......... ... ------ - -------- ...-......... ...... ........




                                                                                    ------ --- -----
                                                                  .. . .... .. ......
                                          ....... ... . ................. ......................... ..... . .......... . ........I... . ........................ .. . ....... ... .......... .... .......
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                                                ..... ...... . ............ ........... .... . ........ ... .. . ........ .....    . .... .......

                                          .... ...... . ....... ........ ..................... . ... ..... ........... ..........................  ---l . ............ .--.1 ........ . ............ ......... ....... . .. . .......................................


                                          ................. .. .. ... . .............. ..... ....... .............. .............. ..... .... ............... ................. ...... .... ......... .. - --.- ......... ..... ............. . ................. ....... ...... . ......... . ....




                                                           ::::          *-,--"-**,*,--*-* -------*--* ---------- ------- --------
                                               . .............. . .--------- ------ -- - ------------------- ..... ... ...........
                                          ........ . ....... ...............                                     - - -- --------- . .. ................... ..
                                          ....... ... ... ...... .. ..... . .. .............. ----- - ----- ....... .. --- ..... .. ......... ---: .... .............. ............ .. ..
                                          .......... ... . ........... .. ... . .... ... ..........................-. ...... .......... . .......... ... .................... ............
                                          .................. . .. ... ......... ... . .............. . . . ... ...... . ....................... .... . ......... ............... .... . ............... .. . .............. . .. . ................... ...................

                                          . ............ ..........  I- ..... . ......... ......... ................. ... . ......................... ........................ ......... . ........ . ..... ......... ....... . .............. .. ........


                                               ......... ........... ........ ........... . ........... ..... ............... . ........................... .. ........ ....... ........ . .......... ........... ........



                                            NEW JERSEY                              CENTER CHANNEL                                     D


                                                     NON-DISINF          ECT.Wl     NTER                  DISINFECTION WI


                           TRANSECT APPROXIMATE RIVER MILE 43






              Graph 2.13D                                   GEOMETRIC MEAN
                                                            TOTAL COLIFORM (MPN)

                                           CONCENTRATION (#/100MI)
                                 1000                                                           ........
                                                                                     . .. . . ...................... .....
                                                  . . . . . .. . ...................... ... ... . ..... ...........
                                                                       .......... ...   .... ...                    .. .......... .. .... ......  -------------
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                                                                       ........... ....... ........... .......... .......... ...... .... .. ..................... . ............. ............. . .......... --- ...............

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                                    loo::  . ..... ..  *--**......... .*"'"*--", - ----- *- .............*** - - - - --------- ..... ..... . ......... . ....... .
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                                           ................... ........ -.- .............. . ...... ... ..... . ..... ...... . ..... ......................... ...... ............................ >-
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                                     10                                   .................  --j
                                                                         . . .........                   ........ ...... ........... .
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                                           ..............I....... .. .. . ............ ........... .................................. .......... ..........................


                                                         ..... .............. .. .......... .. ..... ---- ..... . ........... . ..... .. .........



                                            NEW JERSEY                             CENTER CHANNEL                                      D



                                                     NOWDISINFECTMINTER                                   DISINFECTION Wl


                           TRANSECT APPROXIMATE RIVER MILE 40












               Graph 2.13E
                                                             GEOMETRIC MEAN
                                                             TOTAL COLIFORM (MPN)

                                            CONCENTRATION (#/100MI)
                                  1000      -- ------            ... ....... -,-*"--*-""* - ----------------
                                            ------------             ......... . .... .....
                                            - --------------------- . .. ....                      ---------
                                                                                              -----------------
                                                                         . ......... . ............... . . .... . ..... . ....... .*-------
                                                                    ......... .           . . ........................    .... . ... . .....................
                                                         . ......... . ........ ....... .. ................... .......... ............... ........ ........ . ............... ........ ..... .. .......... ..... . .....

                                                                 ................... . ........... ..... ... . ..................... ............ ...... . ............. ......... ........... . ........ .... .... ......... . ...... .I. ... . ............


                                               ...... .. ..... .......... .. .... . .. ............. . . ............. .............. . . ......... . ... . ............. ................. ... ......... ..... ..... ..... .... ...........  .................




                                                                   . ..... .... ..... ........ ........ .......... ....... ... . . ..........
                                                  ------ -----
                                                                                                                              ............ ...........
                                                                   .. .. . . .. ..... .......... ......
                                                       ...... ..... .......... ...... ..... . ...................... ............ . ..... ....................... .. .....
                                            ....... ......... ....... ..          ..........    . ......
                                                  -- .... ............ .................... .......................... ..... .. ..................... ................

                                            ...... ....... . .. ......... . ......                    ..... .......


                                                                             ........ .....  ............ . ...... . ......       ........ ..
                                              ...........................


                                      10                    . .... . .... .............. ... ...  .......                       ------ - --------- -
                                            . . ...............                . .. ............. ........ ......
                                                                                     ....... . .                   . .....          ............. . .
                                                                     ..... ................. .. ..
                                                                               ...... .......... .........

                                            ..... ......... . ....I...... ..... .........  ---------- . ........ --l-1-1 . ..... ..... .......... ............. ....

                                            ..... . .............I................... ................. ...............I.......................... . .. ............. .......... ..... .... . .. .......... .. ........ ....... ....... .................


                                            ... . ............. ......... . ... -.. . . . ........................................ . . . .... . ... .............. ...... .. ........... . .......



                                             NEW JERSEY                             CENTER CHANNEL


                                                      NOWDISINFECTMINTER                                   DISINFECTION WI


                            TRANSECT APPROXIMATE RIVER MILE 37





                Graph 2.13F                                GEOMETRIC MEAN
                                                           TOTAL COLIFORM (MPN)

                                        CONCENTRATION (#/100ml)
                                1000                           . . . .... ......... .. ... . ........ . ... .. ....... ......... ......... ................ .....
                                                                                                                ... ...... . . .. ........ ....
                                                                . ..........                                     ................. ........................ ..I...................
                                               ..... .... ........... . .. ............ 1- @.......... . .. . ..........
                                        . .. ..... . ............ . . ..... . . ....... . ........................ ..... ...... .. ............ .. .............. ................................... . ........I. ...... ... . ...........I.......... 11 ............. .. ....................
                                        . ........... .................. .... . . ............................ .................................. .. ...................................... . ...... ............... . ................ .. . .......... .... .. ............ ...... ......... ....-.................... ..... .. ......... --

                                            . ... .. .... ........... ......... .... ....... ... ..... ..-.... ............ ... ..... ........... .. . .. .. ...... --- .................... ............... ............... ............... -- .................. ...... .......... ................................. .... ........... ....


                                                    ........ .. .................... ................ ..................................... . .......... .. .. ....................................... ........................... .. ............................. ........... .. . .......... -.--  .................


                                   100                     -..... ...... . .................... .......... .... .-...... .... ....................... ... ...................  ...................................... ....... . ..........
                                              . ............... .. *1.1- ......... .... -- . ............. . .............. . .. ............ .................................... . ....... .
                                                        . ..........-.................. . .... .. .......... .............. ........ ......I.......... ...................
                                        . ........ .... .... ...I.... ............  .................. .......... I.-  ............ ...... ... ... .. ....... ... .... .................. ...
                                             ........ .. ... ............. . .......... ...... ..... .....-........ ........ .................... ............... ....... ...... . ...................... .... ................ .................... ............ . .....
                                        . ........... ........ .......  ............................. ......... ........... .I ..........I......... ....I.... . . . .. .......................... . ... ............. ............ ............... . ... . ... ................. ...... .............

                                                . ..... ..... ..                    ............-.. ............................................................ . .......... . .............................. . ...................... . .................. ...... . .

                                            .......... ... . ................ .. .. .. ............... ....... .. . ..................-... .. .. .. ............... ........ . ........... ............... . ..... ................................I. .....-....................... ...................... ....... ..........

                                     10                                                                  ........ ..  *,:::@::"::::::::::,*,**. . ....... .*... ...... ......... . *::::::::::::-..-*@.,.",@.,.*',
                                        . ......... ... ........ . . .............. .. ......... ... .........:............... ................ .......... . ...... . ......................... ................ ** ......................... -1 .... ..... .. ............... - - --- ---- - -------------- l-,."..'-...- ....... .........  -..
                                          ........ .... .......... . ....  -- . ........ ... ... ................... .. ................... ... ....................... ........................... . ... . ............. . .................... ........................ ...... ................................ ...............
                                                              .. ...... .......... ...... .......................................... ............................................. . . . ............. . ............................. .......... . ........ ................. ................................ ..............
                                        . ............ ...........  --.- ... . ........ ..... ............... ..... .................... ...................................... . ... ............. . ..... ... ...... ........... .......... . ..................... . ....-............................

                                                  .... ......... ..... ...... ............... .. ......................................... . ........ ............  ................ ...... ......... -.- . .. ..........


                                                           .. .. .... ..... ................................................-............ ....................... ...  ............ ......... . ........ ................. ......... ... .............. ............ ............. ..................  ..........



                                       49      48       47      46      45       44       43     42       41      40       39       38
                                                                       APPRONXIMATE RIVER MILE


                                                    NON-DISINFECT.WINTER                                 DISINFECTION WIN


                          CENTER CHANNEL PROFILE












                                                             Graph 2.13G
                                                                                                                                                                                                                             GEOMETRIC MEAN
                                                                                                                                                                                                                          TOTAL COLIFORM WPM

                                                                                                                                                          CONCENTRATION (#/100MI)
                                                                                                                        1000                                                                                                                                                                                                                                  ... ...............   *-------------------- ---- --- - -- ----    . ... . ...........
                                                                                                                                                                                                     -- - ----         . . . ................. .............. ....                                                                                                                                                     .. ............. ............. ..                                              .. ... . ....
                                                                                                                                                                                                                                                                                                                                                                                                                                   ..........                                    ..................
                                                                                                                                                                                                                                                          ..................... .. ....                                                            ... .. .............                                             . ...... -- :                 . ....... .......
                                                                                                                                                                                                                                                          . . . ................                                                                                                                                    . ........... .                                                       ..................... . .
                                                                                                                                                                                                        . . . . ................... . .......                                                  .............. ....     .. ......... . .... ..      ...... ....... ..
                                                                                                                                                                                                                                        ............. . ........                 . . ....               :..........                                                                ............* ..........*..... ..... *-,*"-..-"-*"*-.-.-"..*         ........... -"-*--.,*-..-**  .............  *------

                                                                                                                                                                                                                                                                                 . . .. ................. ........     . ..................... .............. ........ ..........    . ... . ............. --       . . . ....... . .... .. . ............................................       ..... ....... .....

                                                                                                                                                          . . ... . ...... . ........... .. . .............................. .................            ............ .. .... .................        -- .........   . ........                             .. . .......... ............ . ................... . ......  .... ....................................... ................ ...             . ......... . ..




                                                                                                                                                                                                                                                                                                                                                                                                     .... ...       . ............... --  ...... . .....
                                                                                                                                                                                                                                                                                                                       ......... . ................... . . . . ....... ................ ....
                                                                                                                                100 =-.,:                                                                                                                                                                                               *.:-'.*                                                       ....... . .   . ..............   . ..........
                                                                                                                                                                                                  ..... ........              ....                                               . .. ......            -                                                                                  ................... ............... . . . .. ....                        . . . ..............................
                                                                                                                                                                       ...............      ... ............................                                                     ...... .............. . ...... ..     . .....   ....... .. . .....................            - - --------
                                                                                                                                                                                                                                                                                                                                                    .. ......... .
                                                                                                                                                                                                                                                                                                                                                                                                                    ........ .............. .......        ...... . .... . .... ............................ ....... ..
                                                                                                                                                                       .... . ......                                                                                                                                                                                ............                . ...........
                                                                                                                                                          . ...... . ................................... ................                ................

                                                                                                                                                                                  --------- ----    ------------------ -- -     -  ...............        ...................... . ... ..... .................... .......................... ........ . . ............... . .. . ......... . .................      .. . ....                                                .......... ..... .. . . ......... ...

                                                                                                                                                                       ..................................... .. . .....                  . ... ......     ............ . ................ .......... ........ ......... ....... ...........                   .. ....................... - ...... ...... ........ ....... .................................. . ..            ...................

                                                                                                                                        10                                                                                                                                                                                                                                          . .......*... .... ......                                                                                . ............. . .. ..
                                                                                                                                                                                                                                                                                                        ..........     ............. .. .................... .........                      . ......... ... .... ...            . .... ...................
                                                                                                                                                                                                                                                                                                                                                                          .. .... .. ............ ..................
                                                                                                                                                          . ......               ........  ................                                               ........... . .... . ... . ..................................................... . .... .......... ............:. .......... . . ......   ...........     . .... .... .......................       ..........     ......                    ............... . . . ...
                                                                                                                                                                       -. . ......................... -.-  .............     ......... ..........         --- .................. ............           .......... .......    ............ ......... ..       ................................... ............. . .. ......... . . ....... ........... ................. .. ...... . ....... ..... . ........ ......... . ....
                                                                                                                                                          --.-         .. .... ............................ -  . .....................                             . ....... .   --    - ....... ...........           -.. ................... .......... . ........... ................ ...................... . .. . .......... ...... . ...........                  . ...... .. ....  . ......................... . .... .
                                                                                                                                                          . .............. . ............... ..................        ...... ......  ...............     -- ..... ............................................... . .................. . .............       .... .............      ........................      ................ . . ...... .............. . -..-   . ... ..............  ............... ......

                                                                                                                                                          . .........                                 ............               .... . .. .. .......     ........ .. ... ... .. .. ................... ..... .......  ........ .    .. . . ..... ......            ............... .. .......................................          ............   ................. ............     ................  ...................



                                                                                                                                                   49                             48                             47                                       46                     46                                    44                       43                             42                                   41                        40                             39                            38
                                                                                                                                                                                                                                                            APPROXIMATE RIVER MILE


                                                                                                                                                                                                 NON-DISINFECT.WINTER                                                                                                                                                                                      DISINFECTION WIN


                                                                                                  NEW JERSEY (EAST) SHORE PROFILE






                                                        Graph 2.13H                                                                                                                                                    GEOMETRIC MEAN
                                                                                                                                                                                                                     TOTAL COLIFORM WPM

                                                                                                                                                      CONCENTRATION (#/100ml)
                                                                                                                    1000                                                                                                                         -------------                                      .. .. ..... ...... . .......                 - -- -------     ** ....... .........                      ........                                                             ..... .. ...
                                                                                                                                                                                                                                   .. .. ........ . ..... .       *"-,* . ......                   .. . . ............ ...    ** ---------                                                                                      ...... .                                         .. . .....
                                                                                                                                                                                                                                                                                                               .. ....... ...                                                                               .. ....... ....... . .... .. ..... ...                               ...... . ....                        -------
                                                                                                                                                                                                                                                          .. ........... .                                     . ......... ... ..                                 ...... . ...            -.-       -*-,*,*-,"***                 *"'*                                           -'-             -, -*                :. .......... .
                                                                                                                                                                                                       . . . . . ..................              ...............  ........... ........                         ................. -   ........      ...........                            -.-                         . ... . ......... ............... . ..... . ....           ........... . .. ................... . ........... .. .
                                                                                                                                                                                                       . . .. . ....................................... ... ........             ....................          .....   . .......... . ...... .... . ......... . ....... . ........        .... . ... ............ .......... . ...... ...................                        ................... . ... ........... -.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 ........ . . . ...... ....... ....

                                                                                                                                                      . ...................... ..                      .................... . . . ... ........... ....            7..............                              ... . .......... .............................. ...... . .... . ...................  .... ................. . ...................                                 . ............. . . . ..... ..................... ....... ...

                                                                                                                                                                ..............     1- ...........      ........ .......           .......        I......... .............                                                                           ---------------                       ........ .. ....... .......................                                            ...... ....................          ............. ..... .. .


                                                                                                                            100
                                                                                                                                                                                                                                                                                                                       .............. .... ... .A  . .......... ...........                                                                                                      ........ ..........
                                                                                                                                                                                                                                                                                                                                                                                                                           ...... ....... .                                      ... . .. ......................... .........
                                                                                                                                                                                                                                                                                                                                            . ............ . ......
                                                                                                                                                                                                                     ........   .............                                                                          . ...............                           ..........             I..................     ...... ................                                        ........ . ......... 11.1-.1-1 ...........I..........
                                                                                                                                                                                   .......... . ..... . ......... ..  ::::::                                                                                                            ........ ... .
                                                                                                                                                      . ........ ......            -...                ... . ............. . . .. .............. .                                          ........ ..... .... .........................................                                 ..... ..... ........... . ......................................                       -........................... ............. .....
                                                                                                                                                             . . .................      ............ . ............  .............. . ................... ............    ............  ................. .......      ....................  .............. ......... .....                         . ................ . ...                                                     ....................... --.- .................... .............................
                                                                                                                                                                                   ......................... . ......................... .       ....... ................. .... .. ... .....................   . . .....................  . . ......................... . ............                      ......................... .... ...                                   ............... -- ........ . ........... ..... ........... .. .

                                                                                                                                                      . ........ ....... ........................ .............................. ................. ..... . ............... ....           .......... .   ...... . ........................ --    .....................                    -.................  . ..........                                                       ..... ............. ......... .... ... . ....... -..-


                                                                                                                                                      . .. ...........             ....... ........... . . ....... ....... .........................      ...... . ............ .. ...........         ......... . .. . .................. . .. . .....................                   .................... ....... . ...... . ............... ............ . ........        -........................... . .... ... ........... ...

                                                                                                                                    10                                                                                                                                                                                                                                                    . ........ ........ .... ........ ................ . ...... ...... . ..                - - .-.. ---:: . .. .. ....... ........... . ....... ...
                                                                                                                                                           ....... ..............                                            ............. . .... --      ........ . .              .......... . .............. . ..... ............ . . . ............. ..... . ................ .. .    -- - - - - - :--- - - --- - - - ..- - - - , , *--,..: - ". - '.' *.*.., I              ............*........ .. ........
                                                                                                                                                      . .......... . ............ . ......             .... . .................................. . ...........    ............ ...............  .......... ... ................... ..................... ........ ...........             --        ...... . ........ ........ .. ...... . .. ............                       I.................... ............ .............. ... ...........
                                                                                                                                                      . ..................         ................ .  ...............                           ................ . ......................... .......... . .... . .... . .......... . ..... ..... .... . . . .... . ........ . .                                                                                                 ....................... ...... ...........---- ........ ...
                                                                                                                                                      . . ...... .................     -,.-            ......................... ....................................                        .... ....... ............ ....................... .. ....           . ..... ............ .......       .. ... . ...............................                                     . ......... ................... ..... ...... .... ..

                                                                                                                                                                  . .. . .................................... . ............. ..   ...........   .....    .......... .. .. . .................................................. ...................... ..... .. ..........                .... ...........                         ............                                  -.- ...... . ......................... ............... .. ........ ...

                                                                                                                                                                                   ..............................    ...................... ....          ........... ... . .................                          .................... . .......... . ....... . . . . . ......... . .......... ......                     ............... .............................................................



                                                                                                                                                 49                                48                         47                                 46                         45                                 44                          43                                             42                41                                                                   40 39                                38
                                                                                                                                                                                                                                                          APPROXIMATE RIVER MILE


                                                                                                                                                                  - NON-DISINFECT.WINTER                                                                                                                                                                                                                    DISINFECTION WIN


                                                                                               DELAMRE (WEST) SHORE PROFILE






                Graph 2.14A                                                       MEDIAN
                                                            TOTAL COLIFORM (MPN)

                                            CONCENTRATION (#/100ml)
                                  I ooo:::----
                                                                  .... .... .. ... ............. ...... . ..... ........
                                                                            ..... ........                                        . ......
                                                                                . ...........  - ------ -   .............       ---------- - - -----


                                                                  ........ ........ .....        ............        .............. ........ ... .... ......... ................. -

                                            ... . .............                ........... ..... ...... .. . . ........ . ........ ........ . .... .... .. . . ..... . . . .. . ............................................................


                                             ............ .......... ........ . ...... . ........ ........ ... . . .................. .....................-............... ...... . . ............. .......... . ................. . ...... .... . .... ...................... -.l.-....-....-.-- ... .........




                                                                                  ............. .                           ....... . .....................
                                                                                                      . .........
                                                                                                               .............
                                                                                ..... ..... .. ............. ............. .......
                                    100
                                            . ... ...... . .... . ............... -.- . ..... . .. .............
                                            ...........                        ........... ..... :::: .. ..... ...........
                                                .. .. . ............. ......... . .. . . ......................... ........... .. . ........... ........... ........... .... ......... .

                                            ........... . ..... .................. .. . . ......... ........ . . .................. ............. --- . . ............

                                            . ......... ........ . ..................... ..... . ............... .... .......... .................................... ........... . ... . ... ........... ...... .... ......  .............


                                            . . ..... ............. ....... . .........I................. .... ......... ..... ........ ......... . ... .. .. ............................... ......... . ... . ............... ...... .... ................ ......


                                      10                          ..... ..... .....           ....... - -----       - - - - - ----------- -----------
                                                      -- --- -- -- --- ----- --- -- ... . ... ... ............. ..
                                                                          ................ ......
                                            . . ................ -.- .......... . .... ...... . .. . ... . ... .........I........ ... ....... . ..... . ..... .. . .............
                                            . ..... . .................-...... ... . ..... ........... . ....... ......... . .. .. ... ....... ............ ...-........ ................................... ......... ........ .. . ... .. . ... . ........

                                               .. . ............... . .......... . .......... .......... ..--..... . ...... . ... ........... .......................... ........ . ..... ..... ... . ..... ........ .......

                                            . .... ..........  -.1--.1.7 ........... --.- ... .............. ........ ......-. ...... . ................................. ..... . ... . ........ ........

                                            . . ......... ....... ............ ..... ...... . .......... ............. ... ...... . ........ ...... .. ....... ........ .. ... ................... . .......... .. .....  ...........



                                             NEW JERSEY                            CENTER CHANNEL



                                                      NON-DISINFECT.WINTER                            4 DISINFECTION WI
                                                                         !fP7





                            TRANSECT APPROXIMATE RIVER MILE 48






              Graph 2.14B                                                           MEDIAN
                                                           TOTAL COLIFORM (MPN)

                                           CONCENTRATION (#/100ml)
                                 1000                                   -- - - ---------
                                                                               . .. . ............ .
                                                                                             --- -------
                                           ---------            ... .......... ........ ...................... ........ ........... . .. . .........
                                           ------------ . . . . . ... .. . ......................... . ..... . ....................... ...........
                                                                ........... . ...   ... .......... . . ....... . ..................... .. ........... .... .. ............. . ........... .......

                                                                 ..... ....... . .. .... ...................... . .. .. ......... . .......... .. ....... ... .......... -.- ...... . .... . ......  ............


                                                                                                         .... ............
                                           .. . .......... . ........                       . . ...... ...............-


                                    loo:"::*,-*--,*--*--"@-."-"-.-*,-**--,----,-".--."-,-----",.---"--,--* .... .. ...... ... ........ ....... .....
                                                                                                                            . ..... ..........I........ . .........
                                             . ..........
                                                                                                     ....... ........... . ...... .. ..... ........... .. ....... ...............
                                                       ............ . ..... .. .I.............
                                               . ................... .. ............... . ... ...... .---------- -- ----- -l--..------.--------- . ..........
                                                                 . .. ............... .......  ........... . ........

                                           ..... ............... .............. . ............ .... . ....... .................. . . ........ ......... - --------- .. . ........ .... ... . . . . .................. .. ............. . ........ . ..... .. ........ ............ . . . ...


                                           ........ .......... . .....I........... .. .. ........ . ...... ... . ............. .. ........ ... ....... .... .............. .... . .. .. .. ................................... . .. .... ........... .. . .................... . ......................... ....... ..... ..




                                                                    ......... .. ... *"-""*-*::..:.-.:,*-*"",*,*-* ...... .--, . ..........
                                           .... . ...... .... ...... . . ........ *,---....",-:,*:",:::::::,..,-."@'* ......................... . ...
                                           .... ... .......   . . . .. ......... ..... :: . .. ............................ .. .........
                                           ................      ......... .. . .-.......... ... --, ........ ..... . ...... ... . . ................ ...
                                                          ... . ............ ...................................... . .......... ............. .................... .............. .. .... ............. --- . ..... ........

                                            ... . ......... ... ............ .. . .. . . ........... . ..... --- ....... ....... .......... .............. ........... ......... ................. . .......... . ... . ....... ............. ... . . ...... . .......... .. . ....... .. ........... . ..... ....... .. . ........  ..........


                                             ............ ............ . .......... . ...... .. . . ..... ........... . ... ....... ........ ... ...... . . .. . .. .............................. . .. . .......... . ... . ........ . ... . .. . .. ..................... . ................



                                            NEW JERSEY                              CENTER CHANNEL                                     D


                                             - NOWDISINFECTMINTER                                          DISINFECTION WI


                           TRANSECT APPROXIMATE RIVER MILE 46












               Graph 2.14C
                                                                                   MEDIAN
                                                           TOTAL COLIFORM (MPN)

                                           CONCENTRATION (#/100ml)
                                 1000
                                                                                         ...............

                                                                                                           . .........


                                                                                                      . ... . . . . ...... .........

                                                                                                        . ......... . ..................... . ......


                                                                               . .......... .......... . ................... ............. .......... ................ . ......... ........................... ... . . ...... .....




                                                                                   - ------- ------ ---                    .. . .. ......... . ...... . ........ .....
                                                                                      - ------ . ......
                                           ............ . ..... ... ........ . ......... . . ......... .............. ..... ... ...........................  ...........-.. ....... .................. .
                                           ................. . ...... ...... ... ........ . .. ............. ..... ... ...... .. . .......... . .... .. ...... .. . ............... ........ ............... .
                                                             . ..........          . .......... .... .......... . ....... .. .........

                                           .... .......... ...... .. .. . ......... ......... .................. . ...... .. ........... ...... ... . ...... ...........


                                                           . ........................ ........ . ............... . ........ ............. ...... . .. .... .............. . ... ....... ............


                                     10                                                                    - ---- -------------
                                                         ....... .. ......................                                      . ... ......... ..... -
                                                                  ...... ... . ..... ... . . .................... ......
                                                        ............... . ..................... . .... . ...-.... .. . ........ .-.. ... ....... ..................... . ....... . ....

                                           ..... ......... .. . ... ............. ........ ..... . . . ............ .......... . .......... ....... .. ... ........... ........... ................... ...........

                                           ...... . ......... .. ........................... ......... . ...................I.................................... ..


                                           ... ........................................-....... . ........... .............. . .. . ........ . ... ... .................. . ............. . ..... . ....... ................... . . . . . . ............................ .. . .......



                                            NEW JERSEY                             CENTER CHANNEL                                      D



                                                     NON-DISINFECT.WINTER                                  DISINFECTION WI
                                                                        X;@@




                            TRANSECT APPROXIMATE RIVER MILE 43






             Graph 2.14D                                                          MEDIAN
                                                          TOTAL COLIFORM (MPN)

                                         CONCENTRATION (#/100ml)
                                1000 =::     - - - - ----------
                                                                               .................... .. .... . ..........
                                                   --------------
                                                              - - -- -----------         -------          ----------
                                                                                -- ---------- ------ ---- -- -- ---

                                                                               ................ .....I. ...... . .....I.......... ....... ....... . ... . ............. . . . .......

                                                                   ........ . . . . ............ . ..................... .. ..... I-- ..... ..... 1--.1-- ................... . ....... . .... ........................... .........


                                         ..... ......... ..........    ....... . ..... .. ...... . ................. .I................... -.1.....- ........ ........ .. .. . ......... .. ........ ..... .... ... . ........... ...


                                  100                                        - ------                                      ------  ..........
                                                                                             ........ . .............
                                                                               ..............                                  ----- - -----


                                                                               ... . ..... ..... ....... . ................ ..... ........... . ....... .. ........

                                         .... .... ....................... ...... ............. ....... . ........ . ............... ... . .... .......... ..... . .. . .............. ....... ......I.... .. . ..... .... ...... .

                                         . . . .... . ....................-............ ....... ........ .. ...... . ..... .............................. . ................... ... .......... .....


                                            . ........ .. ............. .. .. . ..... .................. ........... . -l...-.-.-.-.--- ........ ....... .. ........I....... .. . .............. ......... ........ .. .... . .. . .......... ........ .. ..... ...... .....



                                    10
                                                                                                 ... ..... ...           ... ........ .. ... ......
                                           ... .. ..... . ..................... ...... . ...... - -- - - ------- -
                                                                               . .............. .. ............ .
                                                  ... ........... ....... . ......... .. . ......... . .................       .......... . .........
                                                  .................... . ..... ...... .......... ... . ... . ........ . .. . . .............. .. ....... ..... .................... .... ..... ...... ..... .... ..... . .................... ......... .. ............ . ...........I. .... . .......
                                            ...........; ........-................. . .... . ......... . .......... ....... . .. .......... ....II................. ........................ ......... ................... .................................

                                         .......... .. . ....... ....... . ... ............................ ........ ... . .................. ......... ............. . ..... ... . ........................... . .. .. .................... ........ .....-............. . ............... . .............. . .... ........ ... ........


                                         ...... ... ............ 1-1 ...................... ...... ........ . .................. .... .. . ... . ... . ........... .................... . .... ..... ............... ........ ............ ............... .... ..... .. ...... .............. . ............... . ..



                                           NEW JERSEY                             CENTER CHANNEL                                     DE



                                                    NON-DISINFECT-WINTER                                 DISINFECTION MIS


                          TRANSECT APPROXIMATE RIVER MILE 40






                       Graph 2.149                                                                                          MEDIAN
                                                                                          TOTAL COLIFORM (MPN)

                                                                 CONCENTRATION (#/100ml)
                                                   1000
                                                                                                                                                                                           --- ----------


                                                                                                                                                          ... . ...... .
                                                                 -------------                   ......... .                                              - -------- - ---------- - --------------------- - --------- . .........
                                                                 --------- - - --         . . .. ................. ...... . ....... ............................... .. ...................... ..................... . .

                                                                                                                             ..... . ............


                                                                                                               . . . ........... . ...................... .....



                                                      100
                                                                                                                                                                                 ------- .......



                                                                 ................ .. . .... ........... .. .. . .......................... ..

                                                                 ......... ....


                                                                                                                     .... ..........



                                                         10

                                                                                  ............... .
                                                                                          - - ------ ------------                - - -----
                                                                         . ............... . . .. ..... . . .............. .-.... ... ..... ..... ......... . ..                                        . ... ....

                                                                 ..... .......... .. . ..... ......... .................. . ................... . ..... . . .... .. ...... .... ... . ............ .... .........

                                                                 ............... .. .....  ............ . ......... .. . . ................:............ .......... ....... . ..........



                                                                   NEW JERSEY                                                 CENTER CHANNEL                                                               c


                                                                                 NOWDISINFECTMINTER                                                              DISINFECTION WI
                                                                                                                       -----------























                                          TRANSECT APPROXIMATE RIVER MILE 37






              Graph 2.14F                                                          MEDIAN
                                                        TOTAL COLIFORM (MPN)

                                       CONCENTRATION (#/100MI)
                               1000                                                                                             .. ..... ... . ... ..
                                                             .......... .. ......... .............. ........ .. ........... .. .............
                                                            ...... .. ............ . ....................-........... ............................. ......... .......
                                         .... ......... ... . .. . ...... . .................................... .. ...... ... .... ........ .............. ........ ....-... ...... ...... ... . ......-....... ... ............ .. ...... ...... ............... ..........-...........
                                          . ..............-...... . . . . . ............. ........ .................. .......... ............. ...... ...........  ........... ............ ....... ................-.. ......... ...-.................... ....... ............

                                       . .... . . . ............ ........... ....... .......... ............ ............. . .......... ..... ...... .. . ... ...... ... ....... . ..... .......... ...... . .........


                                                                  ........... ..   ..... ..........                             .......... ...........


                                 100        . . ......                             .............. .......... ............... ....... ......... .......... .............
                                                     ................   ............. ... ... .......-..........-........ .................... ..... ...... ......... ...
                                            ........... . ............... -.,. -......... . ........... ............  ............ ............ ............  .....................-.......... ....................... . . .....  -.- ............ ... . .......
                                                   .................... ...... ........................  .......... ........... ................. ... ...... .............................. .............. .............. ........ . ........ . ................ ........... ...................... ..........
                                             ..... .............. .............. . ......... ........ .......... .... ........... ..... ............... ....... ............................. . . .... ................... ... .. ...... ..... . ......................... . .......... ................

                                         ..... ..... ......... . ....-...... ...... ... ........... .. ... ......... ..I....................... ...... . ....... ............... ... -- . . . ................ .......................... .... ...... --.6 .......... . ...............


                                             ........... ........ ................ ............ ............ .................. .......... ......... ......... ................................ .... ................. . ..... ...... ........... ........


                                   10                                                                                 . .... .......... ..... . . ...................* F@-
                                       . ........ ........ ... . ........ ............. .......... .. .. ........... ....... .... ....... ............ ............. ............. .......... .............. .. .I............ ......................... .. ....................... ..... .................*. ........ ... ... ... --- ..............:. .... .... ....
                                           -. ............ ........... .............-......... ........... ... . ...... -- ...... ............--................................. ....... ................... --  .................... ........ . .......... . ..........................I.. ...... ............ -.1,:..............
                                           .......................................... ... ......... ... . ...... ...... -- ----  ..............-.... . ........ --- ........................ ......................... . ... .............................. ................. . ........... .. ...... . .......... ....................................
                                           -,.- .............. .. ............. ............. ................................ .......... .-- ................. ............ .. . ...... .........  ............................ ........... . .... ....... ...................... . ..I........ ..:-

                                       . ........ .......... .... ......... --- ....... .. ......... ... ..............  ........................ ............................ .. . ..................................................... ....................... ................................................................... ...................... ..


                                           .................. ............. ........... .. . ........ ....................... .. ........ .............. ..... . .............................. .... ............ .......... ..........-...............



                                      49     48       47      46        46         44   43      42        41     40             39    38
                                                                  APPROXIMATE RIVER MILE


                                                  NOWDISINFECT-WINTER                                     DISINFECTION WIN


                        CENTER CHANNEL PROFILE






                                      Graph 2.14G                                                                                                                                                       MEDIAN
                                                                                                                                               TOTAL COLIFORM (MPN)

                                                                                                     CONCENTRATION (#/100MI)
                                                                              1000 =.._                                                                   ............................ .......
                                                                                                         .. . ......    .... . .... . . . .. ... . .............................          ---                   . ............. ............. . ............... .... ............ . . . .. ....            . ......    ... .. ............... ... .............. .
                                                                                                                                                                                . .........                     . ..... . ........ . *''--* ............. . . ..                                                                      . . .......
                                                                                                                                                                                                                ............ ......................... .....
                                                                                                                                                        ..... . . .........................                                                       .......... ......             . .....                                    ......... ... ............. . .........
                                                                                                                                                                                                                                                                                          . ...............I.......... I......... ...... .... . .......... . ...........
                                                                                                                                             . . . ..... ....... .......... ................            ............................................ .......... . ... ..... . .. ........... ...I.. .............. -.- . ............................ .................. . ...........
                                                                                                                                 . . . . . . . ..... .... . ... ....................... . .......................................................................... . .................................... ............. ................. ............................ ......... .........-.. ................. ... ..........

                                                                                                     . ...... . . ................   . . . ... . .. .. ............ ...................... . .................... ..................................... ... ........ ............... .... . .... . .... ................ ........... . .... ............ ... . ............ ............. .....


                                                                                                     . . .... . ................. ....... ...... .................................................... . ................ . .......................... ........ ...... ............. .. .........................-................. ........ . ...... ............ . . ........ ....... .... ..  ........................


                                                                                    100
                                                                                                                                                                                                                                                          ....................                                             ...................... . .............
                                                                                                     . .............                                                                                                                                                                                                   ... . .............  ................
                                                                                                     . . . . ............... ..... ......                                                                                                         ........ ..
                                                                                                                                                                                                                                                                         . ...................................-............ ............... .............
                                                                                                     . ...... . ............... . ..                                                                                        ......... .....-          . ........... -11 --   I      I         I  I .....   . .....I    ................. ...... ......... ..  ..............

                                                                                                                                             ... .........-. ....... ................................... . ... . .......  .............. ...... . .................................. . ......... ........... .. . ........... ........... ...........


                                                                                                                       . . .........................................   ................ ....                      ............ ...  ...- . ........         .......................                        ..................... .......... ............. . . .


                                                                                         10                                                                                                                                                                                                                            ...........
                                                                                                     . ........ . .. ........................ . ...........            ............ ...............  .............. . ........................... ............ .... .....         - ------  U.J.                               ... . ...........
                                                                                                                    ........ ... ..........  ........  ....  ......    .......                                                                                                                                         . ........ .... ... .... .............
                                                                                                                  .. .....              .......   ......       .....   ........ .... ... ... ........   .... ............... ... .......          ....... .... ...... ...... .............                             ... . ...............
                                                                                                     . ...... . ....... .............   ......... ....... ... ............... .. .................... . . ............................... . ....-...... . . . . .......... . .................................. ............ .. . . ..............  .................... . ................ .................  ........................
                                                                                                     . .............. . ........... . ............... .......................... -.- ... ........................ . .. ............................ . . . ............... ......... .-.---. ........-.............. . .......... . ... . ..................-... ............. ......

                                                                                                     . ........ ............... ......................... ................................ ........................................  ....................... -- . ............. ......... ..... ..... .. ......... . .............  ............... ................ . . . ............. ...... .......................


                                                                                                                                                    ..... .. .. .      .... .. ... ..              . ... .... ...... ... ..........               ..............*..... . ...........
                                                                                                     Fl--'l--i-l*             111 11111111                                                                                                                                                                             IlLit-11
                                                                                                 49                  48                   47                   46                   46                     44                   43                  42                   41                   40                       39              38
                                                                                                                                                                       APPRVA.w,yr%IMATE RIVER MILE


                                                                                                                                NON-DISINFECT.WINTER                                                                                                                  DISINFECTION WIN


                                                                 NEW JERSEY (EAST) SHORE PROFILE












               Graph 2.14H
                                                                                MEDIAN
                                                        TOTAL COLIFORM (MPN)

                                       CONCENTRATION (#/100ml)

                                                                                                                 . ............. ..
                              1000                                . . ........   ------ -** .... .. .................... ... ......... ....*-------------- ----
                                                                        .................. ........ ............ ....... ........ ......... .............. :.:.:: ............... . ......... ..*. .. ........ ......
                                                                                                             ....... .......*..........
                                                                     ............                ................ .-*,...-..-- .. ........................ ....... . .......... . ... ...... ................
                                                                                      ...... ..... .. ................ .......... ... . . . ........ .... .....
                                                   . . . . .. .. . ................... .. .. . .............. . . ............ ............... . .............. . . .. . ........ . ...... . . .... ...... ..... ............. . .. . . . ....... .- -
                                                                                                                          ...... ....I........... ............... . ....... .
                                                                            .. .. . ...........-. .................-... ... ..... . ....... . ...... ............................ .. -.- ................. ............. ........ . . .......

                                          ... ....... . . . . ...... . . ... ....... ..................... . .. ......... .. ............. .............. ..... . ...... ......... .. ............... ......................... . .. ... ...... .



                                         ...... .... .. .....                                    - ------
                                100 =7
                                        ................. .... -.1 ...... ....
                                              ..................... . ......... ....................... .. .............I. ............... .... ................ ............. . ..... . ..... ..
                                        ....... ..... .... ............ .... ... ...........I@:-::I............. . ........... . ......... ....... ...... .. ...........-.......... . ........I................. ................ ......... . .-... --.-
                                       . ........... ... ... ............. ................... N4 .. . . ...................... 111- ......... . .... .............................  ............. -- ......... ............... .. ............-........... . ............--.......... -1-
                                       . ............. .......... ..................................................-........ ....... .......... . ......... ......... . .... .. . . . ... . .. .................................. .......... . .... ...... ..... ................. .................. -..- .................. ................... ....
                                              ....... ... . .......-.......... ............................ ..... . ............................ ................... . . . ... ... ............... ... ............................ ......... ......... ........ . ............ ......... .... ............... ..... ...... .. 111.1 -..

                                       . ....... . .......... . ..... .. ............. . ........ . .............. ............... . ................. ..................... ................ -.-  .................................... . .............. ................. .......... ... .............................. ...........

                                  10 =:i::*-,::::::::::.::@:::..:..:@,:::::::::::@:::.@:::::@@:::.,:::.:::@@@@::::::'@:_::.:::,@-,:,:,.::::..::@:::::::::::::::::::::::::,.-.--,::::::,:::::..::::::-,@::::_-.::::""-,* - - -------
                                                 ........... .......... .. . ... .... ..... ....... . .........  ---- .. .......... ...... ... -- ... . ........ ...........  .......... .. ..... ..... . .. .. .
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                                              . ........ .................... .... ... ....... .... ....... .. ... .................... ....... . ......... ................. ............................................ ----.................................... ........ .......
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                                       . . ........ ... ............. .. .. ........ -- ...... . ..................... . ... ........ .. ........ ....................... . ........... .............. . ........ ........ ............. ........... ..................... . .........

                                       . ..............-.... ..... .. . ... ....... ... ........... . .. . ................. ..........:...................... . ....... . ...................... .................. ... ...... ................... .......... .......... .........

                                    I-1111111 (Ili 1111 111                                                  1                        If
                                     49       48      47      46        45     44      43        42          41  40       39        38
                                                                 APPROWIMATE RIVER MILE

                                          - NOWDISINFECTMINTER                                               DISINFECTION WINI


                        DELAMRE (WEST) SHORE PROFILE











































































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