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






                                                                          Attachment #95.5.6.1


                           ASSESSMENT OF
                           NONPOINT SOURCE
                           POLLUTION IN
                           TRIBUTARIES ENTERING
                           GREAT BAY



                                             A Final Report to

             The New Hampshire Office of State Planning, New Hampshire Coastal Program


                                               Submitted by


                    Dr Stephen H. Jones and Dr. Richard Langan

                                       Jackson Estuarine Laboratory
                                       University of New Hampshire

                                                July , 1996
                                                    

            This Report was funded in part by a grant frorn the Office of State Planning, New Hampshire
            Coastal Program, as authorized by the National Oceanic and Atmospheric Administration (NOAA),
            Grant Award Number NA570ZO320




            TD
            224
            VG72                                                                
            J66
            1996                                                          
                                                                                           
                                                                                      










                                               EXECUTIVE SUMMARY
                     The results from the 1995-96 study have provided a valuable third year of information on
              key water quality parameters. Temporal trends for most parameters are not clearly definable,
              although elevated levels at some sites this past year raise some concerns. The Cocheco River still
              appears to be a key problem area for both nutrients and bacteria. In fact, there are numerous
              concerns at most of the freshwater sites, possibly with the exception of the Lamprey River site.
              Despite the lack of consistent effects of storm events on most parameters, the consistently and
              often statistically significant adverse impact of storms on bacterial levels shows the importance of
              identifying and preventing future contamination from the presently unidentified sources.

                                                    INTRODUCTION

                     The third year of a project designed to determine the effect of rainfall on contaminant levels
              in tributaries to Great Bay was conducted from July 1995 to June 1996. The project was a
              cooperative effort between the NH Office of State Planning, NH Coastal Program, NH Department
              of Environmental Services, NH Fish and Game and the Jackson Estuarine Laboratory. 'Me project
              was similar in design to the two prior years conducted in 1993-1994 and 1994-1995, however,
              several changes were made. Based on the results of the previous two years, several stations were
              eliminated. These included upstream stations in the Exeter and Cocheco Rivers (14 EXT and 22
              CCH) and the Portsmouth Harbor station (GB 13). Several analyses were eliminated because they
              shed little light onto the effect of rainfall and runoff. The analyses that were eliminated in 1995-
              1996 included total phosphorus and particulate nitrogen. Chlorophyll analysis was added for
              1995-1996. Similar to 1994-1995 project year, four storm events were monitored for two
              consecutive days, rather than eight storm events sampled one day each as was done in year one.
                     'Me purpose of the study was to: (1) add to the water quality database established in 1993-
              1995 for Great Bay tributaries; (2) determine the effects of > 0.5 inches of rainfall the day of and
              the day before sampling on the concentrations of indicator bacteria, total suspended solids, and
              nutrients; (3) identify problem areas in the estuary (i.e. those which are contributing greater
              amounts of contamination). (4) identify temporal trends in water quality parameters

                                                        METHODS

                     Fourteen sites in the Great Bay watershed were sampled and analyzed following four
              rainfall events by JEL personnel, and four times between October 1995 and June 1996 during dry
              (random meteorological) conditions by DES and OSP personnel. 'Me sites consisted of one
              freshwater site and one tidal site each in the Exeter, Lamprey, Oyster, Bellamy, Cocheco and
              Salmon Falls Rivers. One additional upstream freshwater site each was included on Oyster and
              Cocheco Rivers. (Fig. 1). A description of the site locations is as follows:

              Exeter/Sguamscott River
                     9 EXT, downstream of 14 EXT, is located at the upstream side of the Rte. 108 bridge in
              downtown Exeter,
                     GB 80 is located in the Squamscott River at the railroad bridge crossing.
              Lam=y River
                     5 LMP is located at the upstream side of the Rte. 108 bridge in downtown Newmarket;
                     GB 15 is located at the mouth of the Lamprey River as it enters Great Bay.
              Qyster River
                     8 OYS is located near the Durham/Lee town line where the.Oyster River crosses Rte 155A;
                     5 OYS, downstream of 8 OYS, is located near the fish ladder in the mill pond, above the
              dam in Durham;







                         GB 50 is located at the mouth of the oyster River as it enters Great Bay, adjacent to Wagon
                  Hill Farm.
                  Bellamy Ri
                         5 BLM is located upstream of the Rte. 108 Bridge in Dover, upstream of the Sawyer's NEU
                  Apartment complex;
                         GB 2 is located just upstream of the Scarnmel Bridge crossing on the Bellamy River.
                  Cocheco River
                         11 CCH is located in Dover at the Watson Road Dam;
                         7 CCH, downstream of 11 CCH, is located just upstream of the dam in downtown Dover;
                         GB 21 is located approximately 150 meters upstream of the tidal junction of the Cocheco
                  and Piscataqua Rivers.
                  Salmon Falls Riv
                         5 SFR is located just upstream of the Rte. 4 bridge in Rollinsford;
                         GB 22 is located approximately 150 meters upstream of the tidal junction of the Salmon
                  Falls and Piscataqua Rivers.
                         Measurements of temperature, salinity (conductivity), dissolved oxygen, pH and
                  observations of weather conditions were recorded at the sampling times. Separate containers were
                  used for collection of water samples for microbial, suspended solids chlorophyll and nutrient
                  analyses. Storm sample collection and processing methods were conducted according to JEL
                  SOP's 1.05 and 1.06. Nutrient analyses for JEL samples were done using Lachat Method 11-107-
                  06- 1 -C for ammonium, method 30-107-04-1-A for nitrite/nitrate and the wet chemistry method of
                  Parsons et al (1981) for orthophosphate. Dissolved organic nitrogen was analyzed using
                  Shimadzu ion specific chromatography with an ANTEK Nitrogen detector on filtered samples.
                  Chlorophyll a analysis was conducted using acetone extraction ftom glass fiber filters and
                  spectrophotometry. Microbial analysis of JEL samples involved standard membrane filtration
                  methods using mTEC agar for detection of fecal coliforms and Escherichia coli and mE agar for
                  detection of enterococci.
                         Rainfall records were examined to determine whether 1995-1996 sampling dates fit the
                  criterion for either "dry" or "storm" sampling. Sample dates were then regrouped as either dry or
                  storm samples. Means were established for all parameters and graphed to determine differences
                  between stations and between dry and storm samples. Differences were tested for significance
                  using one way ANOVA (P!5 0.05), and t-tests for samples with unequal variance (P:!-: 0.05). Data
                  collected in 1995-96 were compared to 1994-95 and 1993-94 data for common stations and
                  parameters, using the same graphic and statistical methods used for 1995-96 data. Data from the
                  three years of the study were used to construct a cumulative database for the common sites and
                  parameters. The three year means were established for all parameters and graphed to determine
                  differences between stations and between dry and storm samples. Observed differences between
                  dry and storm samples were tested for significance using one way ANOVA (P-< 0.05) and t-tests
                  for samples with unequal variance. Combined dry and storm data for 1993-1994, 1994-1995 and
                  1995-1996 were compared to determine if there were interannual differences for specific
                  parameters. Observed differences were tested for statistical significance using t-tests for samples
                  with unequal variance (P@@ 0.05).

                                                              RESULTS
                         Rainfall conditions on sampling dates for 1995-1996 are shown in Table 1. All sampling
                  dates met the designated criterion for the dry and storm groupings. Results of field measurements
                  and laboratory analyses for all parameters except indicator bacteria for dry weather samples are
                  listed in Table 2 and these same data for storm samples are listed in Table 3. Means calculated for
                  each of the stations and parameters are included in the tables as well.


                                                                    2









              Dry vs Storm Samples: 1995.1996

              Dissolved Oxygen
                     Mean dissolved oxygen concentrations were not directly comparable for dry and storm
              samples due to seasonal and temperature differences at time of collection, however the range of
              values and means were similar on storm and dry sampling dates. Lowest measurements were
              detected at the freshwater sites (Tables 2 and 3).

              Percent Oxygen Saturation
                     very little difference in mean percent oxygen saturation was found between dry and storm
              samples at all stations (Tables 2 and 3, Fig. 2 ), and none of the differences were statistically
              significant (Table 4). Mean of storm measurements at the tidal sites (except GB 80) had a higher
              % saturation than the mean of dry sampling dates. Violations of the NH DES Water Quality
              Standard of 75% 02 saturation will be discussed in another section.


                     At all sample sites, the mean pH for dry weather samples was similar to storm sample pH.
              Lowest pH was measured at I I CCH and some unusually high pH measurements were taken at 5
              SFR and GB 22 during a storm in September 1995 (Tables 2 and 3).

              Total Su4ended Solids (TSS)
                     With the exception of sites GB 80, GB 15 and GB 2, the TSS mean was higher for storm
              samples (Fig. 3). Though some of these differences in means appear to be considerable when
              viewed graphically (9 EXT, 7 CCH, GB 21, GB 22), only GB 21 was found to be statistically
              significant (Table 4).

              Suspended Particulate Organic Material (SPOM)
                     Rather than expressing the suspended organic material as a percent of the TSS, the actual
              weight was used for comparison. Marked differences were observed between dry and storm
              samples for I I CCH, GB 21, 5 SFR, and GB 22 with storm samples higher than dry (Fig 4). The
              higher mean suspended organic material at these sites was due to extremely high values in samples
              taken during a storm in September 1995. Chlorophyll content for the sample sites indicate that a
              plankton bloom was responsible for the high the organic content (Figs 26 and 27). Because the
              higher storm concentrations were due to two sample dates (9/18 and 9/19), the differences were
              not statistically significant (Table 4).

              Chlg=hyll a
                     Mean chlorophyll a concentrations were similar at most stations in dry and storm samples,
              though much higher in storm samples at 5 OYS, I I CCH, GB 21, 5 SFR and GB 22 (Figure 5).
              An As mentioned above, the means were greatly influenced by the September 18 and 19 storm
              samples, and showed no difference statistically (Figs. 26 and 27; Table 4).

              Ammonium ion concentration affI41
                     Mean ammonium ion concentrations were lower following storms for sites GB 80, GB 50,
              1 I.CCH, GB 2 1, and GB 22: slightly higher following storms for sites 9 EXT, 5 LMP, GB 15, 7
              CCH, and 5 SFR; and were similar at 5 OYS, 5 BLM and GB 2 (Fig. 6). None of the observed
              differences were statistically significant (Table 4).

              Nitrate concentration M%)
                     Mean storm and dry concentrations of N03 were similar at GB 80, 5 LMP, GB 15, 5


                                                             3








                  OYS, GB 21 and GB 22, and higher in storm samples at 9 EXT, 8 OYS, GB 50, 5 BLM, GB 2,
                  11 CCH, 7 CCH and 5 SFR (Figure 7). However, only at site 9 EXT were the concentrations
                  statistically higher in storms than dry weather samples (Table 4).
                  Dissolved inorganic nitrogcn (DIN = NHA+NQ,)
                         Mean dissolved inorganic nitrogen (NH;+NO3) was higher in storm samples than dry
                  weather samples at 9 EXT, 5 LMP, GB 15, 8 OYS, GB 2, 11 CCH, 7 CCH, and 5 SFR and
                  lower in storm samples at GB 80, GB 50, GB 21 and GB 22. Ile greatest difference, though not
                  statistically so, was observed at 9 EXT (Figure 8).

                  Dissolved Organic Nitrogen (DON)
                         The individual site mean for dissolved organic nitrogen (DON) was lower in storm samples
                  at all sites except 5 OYS, 5 BLM, 11 CCH GB 21, 5 SFR and GB 22 where storm sample means
                  were higher. The greatest differences in means between dry and storm samples were found at sites
                  11 CCH and GB 22. Though it appears that DON concentration decreases at some sites following
                  rainfall and increases at others, none of the observed differences were statistically significant (Fig
                  9; Table 4).

                  Total Dissolved Nitrogen (TDN=DON+DIM
                         Total dissolved nitrogen was similar at most sites and slightly higher in storm samples at I I
                  CCH, 7 CCH, 5 SFR and GB 22 (Fig. 10). None of the differences were statistically significant.

                  Orthophoaphate (PO4)-
                         Mean P04 concentration was higher in storm samples at eleven of fourteen sites. Except for
                  sites 11 CCH, 7 CCH and 5 SFR, the storm sample mean was higher than the dry weather mean.
                  The greatest differences in means were observed at 9 EXT GB 80, GB 15 and GB 50, 5 BLM and
                  GB 22 (Fig. 11). No statistically significant differences were found, however (Table 4).

                  Bacterial Indicators
                         Results of laboratory analyses for all three bacterial indicators of water samples collected
                  during dry weather conditions are listed in Table 10. The results for storm event samples are listed
                  in Table 11. Geometric means calculated for each of the stations and indicators are included as
                  well as the ratio of geometric mean values for freshwater (FW) sites to their corresponding
                  estuarine water (SW) site. There were four sample dates for dry weather and eight for storms.
                         The comparisons of geometric means for dry weather and storm event samples are shown
                  in Figures 27a-c for all dime indicators. Generally, the geometric means for storm events were
                  higher than those for dry weather. For fecal coliforms (FC), 12 of 14 sites had higher means for
                  storm events (Figure 27a). The comparisons show 14 of 14 sites had higher E. coli (Ec) (Figure
                  27b) and 13 of 14 had higher enterococci (Figure 27c) during storm events. The sites where storm
                  event means were lower than dry weather were GB80 and 1 ICCH for FC and GB2 for
                  enterococcL although for aU three exceptions the means were virtually identical. Statistical
                  comparisons of the dry and storm results were made using paired t tests, and the results are shown
                  in Table 12. FC were significantly different at 4 sites, Ec at 6 sites and enterococci at 6 sites.
                  Storm event data were greater than dry weather in every case. Three sites, 9 EXT, GB 80 and
                  7CCK had significant differences for all three indicators. At 50YS and 5 BLM, both Ec and
                  enterococci were significantly different. In addition, Ec were significantly different at GB 50 and
                  FC were significantly different at GB 2 1. The sites where there were no significant differences for
                  any indicator are GB 80, GB 15, 8 OYS, GB 2, 11 CCH, 5 SFR and GB 22.
                         'Me State of New Hampshire has adopted different bacterial indicators for water quality
                  classification in different environments and for different purposes. Enterococci is the standard for
                  marine and estuarine recreational waters, fecal coliforms are for shenfish-growing waters and


                                                                     4








               Escherichia coli is used to classify recreational freshwaters. Geometric means and frequency of
               relatively high levels for each indicator, condition and site are critical to classification protocols,
               and were compared to State standards in this study.
                       In tidal waters, the limit for fecal coliforms to prevent a prohibited classification is <88
               FC/100 ml and 10% of samples not over 260/100 ml. The geometric mean limit was violated
               during dry weather in four of the six tidal sites, GB 80, GB 15, GB 21 and GB 22, all sites that
               are presently classified as prohibited. FC were <14/100 ml, the standard for approved
               classification, at GB 50, and just over the approved limit at 151100 nil at GB 2 (Table 10). These
               results are also consistent with present classification of these sites, although GB 50 is actually just
               outside of a nearby approved area. The same trend held for storm event results (Table 11), except
               that the geometric means for the two lowest sites, GB 50 and GB 2, were both >14/100 nil,
               although still <88/100 ml. For recreational use, swimming in tidal waters requires a geometric
               mean to be <35 enterococci/100 nil in three successive samples in 60 days with no sample
               >104/100 nil. The geometric mean and high value limits were not violated at any of the tidal sites
               during dry weather (Table 10). Ile geometric mean limit was violated at GB 21 only during storm
               events, but values >104/100 nil occurred at least once in four sample dates for all six tidal sites.
               Again, GB 50 and GB 2 had the lowest values for enterococci following storms, as seen for FC.
                       In freshwaters, the limit for Class A waters is <47 E. coU1100 nil, with no sample over
               153/100 nil in three consecutive samples. For Class B waters, the limits are 126 and 406/100 ml,
               respectively. Swimming waters requires limits of <47/100 ml for a geometric mean with no
               sample >88/100 ml. During dry weather, sites 11 CCH, 7 CCH and 5 SFR had geometric means
               >47/100 ml, but <126/100 ml, thus meeting Class B but not Class A requirements. The other
               sites, 9 EXT, 5 LMP, 8 OYS, 50YS and 5 BLM all had geometric means <47/100 ml, although at
               least one of four samples were >88/100 nil at 9 EXT, 5 OYS and 8 OYS. Following storms, six
               of the eight freshwater sites had geometric means >126/100 ml, and the other two sites, 5 LMP
               and I I CCH, had geometric means >47/100 n-A. Thus, conditions are cleanest at 5 LMP and 5
               BLM during dry weather, with adverse effects of storms at both, especially 5 BLM.

               Differences Between the Day of the Storm and the Following Day Samples

                       Samples were collected for bacterial indicator analysis on both the first day of storm events
               and the following day. This was a follow-up to last year's study where the concern was to
               determine when to best detect the flush of contaminants that may be washed into surface waters
               during storms. Without detailed assessments at each river-estuary site, the hydrology and
               contamination response was not known. In last year's study, the only instance of significant
               difference was for enterococci at 11 CCH, although the second day results were generally higher
               that the first day. For this study, the first day geometric means were higher than the second day
               means in 11 of 14 sites for FC (Figure 28a), 8 of 14 sites for Ec (Figure 28b), and 7 of 14 sites for
               enterococci (Figure 28c). The only instance where a significant difference was calculated was for
               enterococci at G1315, where the first day mean was significantly greater than the second day mean
               (Table 12). Thus, it appears that either day gives similar results, probably as contaminants
               continue to be washed by sampling sites from upper portions, of the respective watersheds.

               Between Site Differences as Indicated by 1995-96 Data

                       Analysis of the concentrations of the contaminants of concern (i.e. TSS, nutrients, bacteria)
               and water column condition (D.O.) was conducted to determine which sites appear to be "problem
               areas" with respect one or more contaminants. Particular attention was paid to differences between
               upstream and downstream freshwater sites in those rivers with more than one freshwater site
               (Exeter, Oyster and Cocheco Rivers) and between the downstream freshwater site and its tidal
               counterpart.


                                                                   5









               Total suspgnded solids (TSS)
                     means for TSS at all freshwater sites were generally low in both dry weather and storm
               samples (=5 mg/L). Occasional higher TSS concentrations (10 mg/L or greater) were measured at
               I I CCH and 5 SFR due to plankton blooms and at 7 CCH under particularly windy conditions.
               TSS concentration at site 8 OYS was higher than 5 OYS during dry weather and storms, so it
               appears as though some of the suspended load settles out before the freshwater endpoint in the
               Oyster River. In comparison to their freshwater counterparts, the tidal sites each show elevated
               concentrations in TSS. Sites GB 80 in the Squarnscott River, followed by GB 15 (Lamprey), GB
               21 and GB 22 (Salmon Falls) have the highest concentrations under both sampling conditions.
               GB 50 (Oyster) and GB 2 (Bellamy) are similar, and lower than the previously mentioned sites.
               Statistically, GB 80 and GB 15 were higher than all other sites in dry weather and higher than all
               sites except GB 21 and GB 22 in storms (Table 5). When dry and storm data are combined GB 80
               is significantly higher than all other stations and GB 15 is higher than all stations except GB 80
               (Table 5).

               Susj&nded Particulate Organic Material (SPOM)
                     SPOM appeared elevated in storms at GB 22, 5 SFR, GB 2 1, 11 CCH and GB 21 in
               Storms and at GB 80 and GB 15 in both dry weather and storms. This parameter is a measure of
               both living (plankton) and nonliving (detritus) organic material. The station differences observed
               for SPOM in the 1995-1996 data at GB 22, 5 SFR, GB 2 1, 11 CCH and GB 21 were primarily
               the result a plankton blooms in the Salmon Falls, Cocheco and Oyster Rivers following a rain
               storm in September. The higher concentrations observed in the tidal Squarnscott and Lamprey
               Rivers are likely due to resuspension of detrital material from the marshes surrounding these river
               mouths.

               Chlg=hyjU
                     Elevated chlorophyll a was measured in storm samples at GB 22, 5 SFR, GB 2 1, 11 CCH,
               and 5 OYS and in dry weather samples at GB 22. Though the means appear extraordinarily high
               by comparison, they are greatly influenced by the 9/18 and 9/19 storm sampling. Heavy rains
               following an extended hot dry period resulted in ideal conditions for a plankton bloom at these
               sites. Nutrient concentrations were high as well, therefore the magnitude of the bloom may have
               been light limited. The bloom did not result in anoxic or hypoxic conditions, and oxygen was >
               100% saturation at GB 21 and GB 22 (Table 3; Figs 2 &5).

               Nitrogcn
                     With regard to nitrogen, a great deal of variation was observed in the form or "species" of
               nitrogen between sites, as well as within sites between dry weather and storms was observed.
               Natural processes and transformations of the different forms of nitrogen, such as plant and animal
               excretion, detrital decomposition, uptake and assimilation, make it difficult to view nitrogen
               .concentrations as a more conservative component such as salinity can be viewed. Some general
               trends were observed, however, and some identifiable problem areas can be determined.
                     Highest mean NH4 concentrations at the freshwater sites, in descending order, were
               measured at I I CCH and 7 CCH in both dry and storm samples and at 5 SFR, 5 LMP and 9 EXT
               in storm samples. Highest mean NH4 concentrations at the tidal sites were measured at GB 21,
               GB 15 and GB 80 in both storm and dry samples, and GB 21 in dry weather samples (Fig. 6).
               Statistically I I CCH was significantly greater than all other sites in dry weather, greater than all
               except 7 CCh and 5 SFR in storm samples and > than all except 7 CCH in storm and dry samples
               combined. The only other statistically significant difference for ammonium was in combined
               samples where 7 CCH > 8 OYS (Table 5).
                     Mean nitrate (NO3) concentrations were highest at the freshwater sites


                                                        6








                i I CCH, 7 CCH,5 SFR, 8 OYS and 5 OYS (dry and storms). In the tidal sites, mean N03 was
                highest at GB 21, GB 22 and GB 80 (dry and storms) (Fig. 7). When NH4 and N03 are
                combined as DIN, the sites with the highest concentration of dissolved inorganic nitrogen in both
                dry weather and storms are 11 CCH, 7 CCH, and 5 SFR. Tidal sites with elevated mean DIN are
                GB 21 and GB 22 (Fig. 8).
                       Mean concentrations of dissolved organic nitrogen (DON) were highest in the Exeter (9
                EXT) Salmon Falls (5 SFR), and Oyster Rivers (5 OYS), though differences between sites were
                not as great as they were for DIN. DON concentration at the tidal sites were similar, though
                highest at GB 22 in storms (Fig. 9). No statistical differences were found between sites under any
                conditions for DON concentration (Table 5).
                       Mean total dissolved nitrogen concentration at each freshwater site was compared with its
                tidal counterpart, as well as with the "upstream " freshwater sites in those rivers with multiple sites
                (Oyster and Cocheco Rivers). Though no significant differences between freshwater and tidal
                sites were found, graphic presentation of the data (Fig. 10) suggests that all the freshwater portions
                of the rivers contribute some nitrogen to the estuary, and the Cocheco (upstream site 11 CCH in
                particular) and Salmon Falls make significant freshwater nitrogen contributions.


                       Highest concentrations of P04 were measured at each of the tidal sites and at 11 and 7
                CCH in the Cocheco River. Comparison of the concentrations at these two sites to GB 21 indicate
                that there is a freshwater source of P04 in the Cocheco River (Fig. 11). Results of statistical
                analyses indicate that P04 concentrations under all conditions combined at GB 80 are significantly
                higher than all freshwater sites except 11 and 7 CCH (Table 5).

                Dissolved Oxygrn
                       On numerous sampling dates both dry and storm at many sites, percent 02 saturation fell
                below the NH water quality criteria of 75% saturation (Table 2 and 3). All but one violation (a dry
                weather measurement at GB 22) occurred in the freshwater sites. Mean percent saturation was
                higher at half the sites in storm samples, and lower in the others (Tables 2 and 3, Figure 2). No
                statistically significant differences were found in dry weather, however, in storm samples, 02
                saturation was significantly lower at 11 CCH than at all tidal sites and at 5 SFR. Site 5 OYS was
                significantly lower than all tidal sites except GB 80 and lower than 5 SFR. Site 5 BLM was lower
                than GB 2, 15, 21, 22 and 50; site 5 LMP was lower than GB 15, 21 and 22 and 9 EXT was
                lower than GB 15, 21, and 22. These same sites (in descending order 11 CCH, 5 OYS, 9 EXT, 5
                BLM, 5 LMP) were also significantly lower in % saturation in combined storm and dry weather
                samples (Table 5).

                Bacterial Indicators
                       There were many differences between sites for all three bacterial indicators for the different
                conditions sampled (Figures 27-28). Statistical comparisons were made of wet and dry condition
                results to determine which sites might be the worst sites, and which sites might be the least
                contaminated. The results of the statistical analyses are shown in Table 13, which shows which
                pairs of sites are significantly different. To determine which site is greater in each case, Figures
                27a-c and Tables 10 and I I should be reviewed. The highest FC geometric mean was at GB21
                during both dry and storm events, and was significantly higher than GB 50, GB 2 and 5 LMP for
                both conditions, 5 BLM and 8 OYS during dry weather and GB 80 and I I CCH following storms.
                Other sites that were significantly higher than other sites during dry weather were 5 SFR and I I
                CCH compared to GB 50, GB 2 and 5 LMP. GB 50 and GB 2 were the least contaminated sites,
                both being significantly lower than the GB 21, 5 SFR, 11 CCH, 7 CCH, and GB 15, with GB 50
                lower than GB 80 and GB 22. Only 5 OYS and 9 EXT were not significantly different than any


                                                                   7








                 other site. For storm events, 7 CCH, 9 EXT, 8 OYS and 5 SFR had significantly higher levels of
                 FC that 5 LMP, GB 50 and GB 2. Again, GB 50 and GB 2 were the least contaminated sites and
                 were significantly lower than GB 21, 7 CCH, 9 EXT, 8 OYS, 5 SFR, 5 BLM, 5 OYS, GB 22 and
                 GB 15, while GB 2 was also significantly lower than I I CCH.
                         Like the FC data, the highest Ec geometric mean was at GB 21 during both dry and storm
                 events, and was significantly higher than GB 50, GB 2 and 5 LMP for both conditions, 5 BLM
                 during dry weather and GB 80 and 11 CCH following storms. Another site that was significantly
                 higher than other sites during dry weather was 5 SFR, compared to GB 50, GB 2 and 5 LMP.
                 GB 2 was the least contaminated sites, being significantly lower than the GB 21, 5 SFR, 11 CCH,
                 7 CCH, GB 15, GB 80, GB 22 and 9 EXT. Only 5 OYS and 8 OYS were not significantly
                 different than any other sites. For storm events, 9 EXT and 8 OYS had significantly higher levels
                 of FC that 5 LMP, GB 50 and GB 2. Again, GB 50 and GB 2 were the least contaminated sites
                 and were significantly lower than GB 2 1, 7 CCH, 9 EXT, 8 OYS, 5 SFR, 5 BLM, 5 OYS, GB 22
                 and GB 15, while GB 2 was also significantly lower than 11 CCH and GB 80.
                         The enterococci results were somewhat different from the FC and Ec results. The highest
                 geometric mean was at 8 OYS for storm events and 7 CCH during dry weather. For dry weather,
                 both 7 CCH and GB 21 were significantly higher than 5 LMP and GB 50, while 5 SFR was
                 significantly higher than gb 50, the least contaminated site. Many sites were statistically the same
                 as all other sites. For storm events, * OYS was significantly higher than GB 2, GB 50, GB 15,
                 GB 22 and GB 80. Sites 9 EXT, 5 OYS, 7 CCH and 5 BLM were significantly higher than GB
                 50 and GB2, which were again the least contaminated sites. GB 21 also had significantly higher
                 levels than GB 2. Only 5 SFR, 11 CCH and 5 LMP were not* significantly different than any
                 other sites.
                         Overall, the sites that were most consistently high were GB21, 7 CCH and 5 SFR under
                 both conditions, 9 EX  'T and 8 OYS during storms, and 11 CCH during dry weather. The least
                 contaminated sites were by far GB 50 and GB2 under both conditions.

                 Interannual Comparison

                 Dissolved Nutrients and Other Abiotic Parameters
                         Combining dry and storm sample data for each of the dime project years provided an
                 opportunity to assess interannual variation in the water quality parameters and possible water
                 quality trends at the sites under all conditions. DON and % oxygen saturation were calculated for
                 project years two and three only.
                         For ammonium, concentrations were higher in the 93-94 and 95-96 than the 94-95 year at
                 nine of the twelve sites sampled for the dime year period, however none of the 93-94 to 94-95 to
                 95-96 P04 concentrations (Figs. 13 and 14). Concentrations in 1994-95 were for the most part
                 lower than the preceding and succeeding years, and the 93-94 to 95-96 comparisons were
                 inconsistent as which years had greater or lower concentrations of N03 and P04. Significant
                 differences were found for N03 at GB 15 (95-96>94-95) and GB 22 (95-96 >94-95) (Table 8).
                 No significant differences were found for P04 (Table 6). 'Me dime year comparisons for TSS
                 concentrations indicate that TSS was similar for the dime project years (Fig 15). No statistically
                 significant differences were found (Table 8), however, TSS appears to have increased at GB 15
                 and decreased at GB 80 and GB 50 throughout the period.
                         DON Concentrations were similar in the two years, with only GB 22 showing a noticeable
                 increase over the previous year (Fig 16). Percent oxygen saturation was slightly higher in the
                 1995-96 samples at twelve of fourteen sites and slightly lower at two. The interannual change,
                 however, was minor (Fig. 17).

                 Bacterial Indicators
                         Dry weather and storm event weather results from all three project years were compared to


                                                                   8








               determine if there were any observable trends at any sites. The geometric means from all three
               years are shown in Figures 29a-c for dry weather and Figures 30a-c for storm events. In
               particular, the results show how contaminants are this last year compared to previous years. For 5
               sites, 9 EXT, 5 LMP, GB 21, 5 SFR and GB 22, the geometric means of the different indicators
               were highest in 1995-96 compared to both other years in 5 of the 6 indicator/conditions presented
               in the 6 figures (Figures 29 and 30 a-c). ANOVA was run to determine any significant differences
               between years for the indicators at different sites. The results of the statistical analyses are shown
               in Table 14. There were no clear trends amongst the sites for significant differences between
               years. In the comparison of 1995-96 to the second study year 1994-95, indicator geometric means
               were higher in 1995-96 for FC at GB 80 and 5 SFR, for Ec at GB 80, and for enterococci at 5
               LMP and GB 50 (Table 14). In the comparison of 1995-96 to the first year 1993-94, the
               geometric means for indicators during 1995-96 were significantly higher than 1993-94 in 9 cases
               and the opposite was true in two cases. In the comparison of the fist year 1993-94 to the second
               year 1994-95, the first year was greater than the second in three cases, and less that the second
               year in two cases (Table 14). In general, the first two years did not show consistent differences
               for sites and indicators under dry and wet weather. The past year has shown numerous cases
               where indicator levels were higher than in both of the previous years.

               Cumulative Database Comparison of Storm vs Dry Samples: 1993-96

               Dissolved Nutrients and Other Abiotic Parameters
                       Dry weather and storm data for the three project years were combined to establish a
               cumulative three year database (Table 9; Figs. 18-23). The cumulative data shows a pattern similar
               to the individual project year data in terms of the sites which appear to exhibit water quality
               problems and the effects of storms on concentrations of specific parameters. Sites 11 CCH, 7
               CCH, 5 SFR, and 5 OYS have the highest mean concentrations of ammonium and nitrate of the
               freshwater sites and sites 7 CCH, 11 CCH and 5 SFR show elevated concentrations of nitrate in
               storm samples (Fig. 19). Sites 7 and 11 CCH and 5 SFR have elevated ammonium
               concentrations in storm samples (Fig 18). The storm vs dry differences for nitrate and ammonium
               at these sites are statistically significant for nitrate 9 EXT only, where storm samples are
               significantly higher than dry weather. The concentrations under both conditions, however, are
               relatively low (= 0. 10 mg/L) and much lower than the Oyster, Cocheco and Salmon Falls Rivers.
               Of the tidal sites GB 21 and GB 22, and to a lesser extent GB 15 and GB 80, show elevated
               concentrations of ammonium. and nitrate (Figs. 18 and 19).
                       Orthophosphate concentrations are highest at GB 80, GB 50, GB 21, GB 22, and 11 and 7
               CCH, however storm sample means are only slightly greater than dry weather means at the tidal
               sites (Fig 20). TSS concentrations are highest at GB 80 and GB 15 and do appear to increase
               slightly in storm samples (Fig. 21 ).
                       For Dissolved organic nitrogen (DON) no consistent pattern of difference was observed
               between the two year dry vs storm comparison (Fig 22). The same was true for oxygen saturation
               as well (Fig. 23).,

               Bacterial Indicators
                       An evaluation of all sites using the combined results for all three years was made as a basis
               to make general statements about the effects of storm events on water quality using a large
               database. Data are summarized in Tables 15, 16 and 17 for FC, Ec and enterococci, respectively.
               The geometric means of the 3-year databases for all three indicators for dry weather and storm
               events are shown in Figures 3 1 a-c. The geometric means for all three indicators following storm
               events were always greater than for dry weather (Figures 3la-c). Statistical analysis (ANOVA) of
               these results strikingly shows that this effect is significant in every case (Table 14). Thus, the
               large databases for the indicators over the three year time period of the project allow for more


                                                                  9








                 robust analysis of the effect of storms, and show that in every case, storm events appear to be
                 contaminating the surface waters at the study sites. Ile adverse effects on water quality are seen in
                 all tidal and all freshwater sites.

                                                           DISCUSSION

                         Analysis the data collected in tributaries to Great Bay over the three project years indicates
                 appears that 1) rainfall has an impact'on the concentrations of some contaminants at some sites; 2)
                 some sites (rivers) exhibit more severe water quality problems than others; 3) violations of bacterial
                 water quality standards are widespread, especially following storms; 4) oxygen saturation
                 seasonally is below NH water quality standards for all of the tributaries in their freshwater portion
                 regardless of weather conditions; 5) there is considerable interannual variation in nutrient
                 concentrations and therefore no clearly observable trends in these parameters over the three year
                 period, and 6) sources of contamination cannot be clearly identified as either point or nonpoint
                 from this data.

                 Rainfall impacts and problem areas

                         The bacterial data are strong evidence of the significantly adverse effects that storm events
                 have on the water quality at all sites. Some favorable water quality results were observed during
                 dry weather. However, bacterial water quality standards for Class A and shellfish-growing waters
                 were violated at virtually all sties following storms. Estuarine sites also had questionable data
                 relative to the recreational water standard following storms.
                         Though few statistically significant differences in nutrient concentrations were found
                 between dry and storm samples, the differences in concentrations following rainfall cannot be
                 ignored. Both the dry weather and storm data exhibit a great deal of "within treatment" variation.
                 This amount of variation in a relatively small data set makes obtaining significant differences
                 between treatments using ANOVA (P_< 0.05) or t-tests very difficult, even if there is an obvious
                 difference in means. Ile concentrations of ammonium, and in some cases nitrate (8 OYS, 5 OYS,
                 GB 21 and GB 22) are higher in storm samples than in dry weather, particularly at the sites that
                 exhibit more severe water quality problems. These sites include 7 and 11 CCH and GB 21 in the
                 Cocheco River, sites 5 SFR and GB 22 in the Salmon Falls River, 8 OYS, 5 OYS , and GB 80 in
                 the Squamscott River. Sources of nutrient contamination in these rivers appear to be:

                 Cocheco River: The freshw   ater portion of the Cocheco (upstream of I I CCH) appears to be a
                 major source of nutrient (both nitrogen and phosphorus) contamination to Great Bay, though
                 additional input of contaminants directly into the tidal portion cannot be ruled out. Site I I CCH
                 (downstream of downtown Rochester) had nutrient concentrations that were significantly higher
                 than all other sites except 7 CCH, indicating that there are significant sources of contamination in
                 the Cocheco River upstream of this site. Sources of nutrient contamination in the freshwater
                 Cocheco sites are probably a combination of point sources (Rochester POTW) and nonpoint
                 sources (urban and agricultural runoff).
                         The freshwater sites showed different trends for bacteria. 11 CCH had relatively low
                 levels of bacterial contaminants while 7 CCH had relatively high levels of indicators, especially
                 following storms. The associated tidal site, GB 21, had by far the highest levels of FC and Ec,
                 both during dry and storm events. The area around the dam and below it to GB 21 appear to have
                 relatively high levels of bacterial contamination, implying urban-Dover related sources could be
                 important.

                 Salmon Falls Riv      A combination of point source (Berwick, Rollinsford, Sommersworth
                 POTW's), and nonpoint source in the form of urban runoff from Rollinsford and Sommersworth,


                                                                   10








               agricultural runoff in Rollinsford (several large dairy farms) are likely contributing to the nutrient
               load and high concentrations of nitrogen and phosphate measured at 5 SFR. This input no doubt
               affects the tidal portion of the river, though there are both point (South Berwick POTW) and
               nonpoint sources directly to the tidal portion that impact site GB 22 as well. Based on bacterial
               indicators, the freshwater and estuarine sites in this watershed were not the cleanest or the dirtiest.
               A consistent and relatively strong adverse impact of storms is apparent for last year, with a solid
               effect based on the three year database. Solving the problem of storm contamination could
               markedly improve water quality in this river.

               Oyster River: Problem areas appear to be in the freshwater portion of the Oyster River (8 OYS and
               5 OYS). Since little difference in nutrient concentrations was found between 5 OYS and 8 OYS,
               the upstream site (which receives runoff from agricultural fields) and downtown area (urban
               runoff) probably both contribute to nutrient loading to the tidal portion of the river. The clean
               downstream water at GB 50 also points to the freshwater stretches of the river as sources bacterial
               contaminants. The significantly higher levels of Ec at 5 OYS following storms last year and the
               long-term effect at GB 50 and both freshwater sites suggests     .that the freshwater portion could be
               having adverse effects on water quality at a site that is in close proximity to a recently classified
               approved shellfish-growing area. Further improvements in water quality, especially following
               storms, will be needed for any expansion of approved sites for shellfish harvesting in that area.

               Exeter/Squamscott Riven The data for 1995-1996 once again indicate that the freshwater portion
               of the Exeter River does not appear to have an impact on the        al quamscott River with regard to
               nutrients and suspended sediments. Even though storm sample concentrations of N03 were
               significantly greater than dry weather samples, the concentrations under both conditions were
               among the lowest measured. Nutrient concentrations at site GB 80 in the Squamscott are affected
               by point sources (Exeter and Newfields; POTW's) and nonpoint sources (agricultural runoff, septic
               systems) in the tidal portion of the river. The strong effect of storms suggests that some nonpoint
               sources of bacteria exist in the freshwater portion of the river. The lack of effect of storms this last
               year at GB 80 is probably related to the observed higher levels of bacteria during dry weather. The
               source of this contamination is not known, although the Newfields POTW is located just upstream
               from GB 80, and the agriculturally-active Stuart Farm is just past that.

               Bellamy and Lam=y Rivers: By comparison to other rivers, the data indicates that neither the
               Bellamy nor the Lamprey Rivers appear to be contributing excessive nutrients to Great Bay. The
               same is essentially true for bacteria, although the Bellamy at 5 BLM is severely affected by storm
               events, with both Ec and enterococci being significantly higher during storm events compared to
               dry weather.

               Parameters

               Oxygcn Saturation* 17hough the data indicates that oxygen saturation was fi-equently below NH
               DES water quality standards (75% saturation) in the freshwater portions of all the tributaries, the
               dissolved oxygen measurements (most - 5 mg/L) do not indicate severe biological problems.
               Furthermore, these saturation assessments were based on point samples, mostly taken in the early
               morning when 02 saturation would be at its lowest point in the day. Additionally, the lowest
               measurements were observed in early fall following an extraordinarily hot and dry summer.
               Depressed oxygen would be expected due to the lack of flow and stagnation of shallow water that
               is enriched with nutrients.

               Dissolved organic nitroggn. DON appears to be an important component of the total nitrogen and
               exceeds or equals dissolved inorganic nitrogen (NH4 + N03) at some sites. The constituents of


                                                                   I I








                DON can be a variety of proteins, free amino acids as well as other substances, and the
                interpretation of the concentration of DON without fractionation and identification of its
                composition is rather vague. There are however, several interesting observations that can be made
                with regard to DON concentration. Those sites which exhibit more severe water quality problems
                (for nutrients such as total N, P04) , such as in the Cocheco, Salmon Falls and Oyster Rivers had
                lower concentrations of DON relative to DIN.

                NHA and NQ3: The inorganic species of nitrogen should continue to be measured. They are the
                fon@is of N mo-st readily assimilated by plant species and are therefor most likely to be associated
                with nitrogen enrichment. Also, at the sites (rivers) that appear to have the most severe water
                quality problems, total N is composed to a great extent of DIN.
                TSS: The freshwater portions of the tributaries do not appear to be contributing to the total
                suspended sediment load in Great Bay. Though it appears that rainfall may increase suspended
                sediments slightly at tidal sites, the effect of wind driven waves on resuspension of sediments that
                are already in the estuarine system can confound the interpretation of the results. There is no doubt
                that heavy rains (>2" in 24 hrs) will wash sediments from the land into the rivers and the estuary,
                however, it is widely accepted that wind driven resuspension is the most important cause of water
                column sediment load. and sediment transport in shallow estuaries.

                SPOM: Measurement of the suspended particulate organic material is a useful and inexpensive
                water quality parameter. Done in conjunction with water column chlorophyll and nutrient
                concentrations, it helps explain processes that occur in turbid heterotrophic estuaries such as Great
                Bay (Fig 26).
                Chlorophyll - Water column chlorophyll is a useful measurement when vying to deterrrdne the
                             L
                impact of nutrient loading in estuaries. Processes such as plankton blooms that involve the
                transformation of free inorganic nitrogen into the living form play a critical role in determining
                estuarine water quality. Measurement of water column chlorophyll also helps interpret TSS and
                SPOM data (Figs 26-28).

                Bacterial Indicators
                        The use of the three indicators in this study has provided some key information on the
                effects of storm events on water quality throughout the estuary. There is increasing pressure in
                coastal New Hampshire and surrounding towns to have clean, usable waters, both fresh and
                estuarine, for a variety of purposes. Clearly stated standards provide *invaluable references for
                bacterial results from this study, and suggest that determining the effects of storm events on
                whatever unidentified sources of contaminants ar present is extremely important.













                                                                 12









           Table 1. Rainfall conditions relative to sampling dates and classification
           based on the following criteria:

                           Wet>0.25" cumulative rain on of and day prior to sampling date
                           Dry =<0.25" rain.



                                                           Cumulative
                                                           rainfall on
                                           Sampling        sample date     Condition
                            DATE           Agency          & prior day     classification
                                   9/18/95 JEL             .06/1.21        Wet
                                   9/19/95 JEL             0/0.06          2nd d wet
                                   10/17/95 DES            0.01/0.01       Dry
                                   11/2/95 JEL             1.89/1.98       Wet
                                   11/3/95 JEL             0.02/1.91       2nd d wet
                                    4/9/96 DES             0.01/0.26       Dry*
                                    517/96 DES             0/0.13          Dry
                                   5/17/96 JEL             0.82/0.83       Wet
                                   5/18/96 JEL             0/0.82          2nd d wet
                                    6/4/96 DES             0.08/0.17       Dry
                                   6/23/96 JEL             0.18/0.31       Wet
                                      4/96 JEL             0/0.18          2nd d wet
             Rainfall could have occurred 2 days before sampling occurred.






            Table 2. Dry weather data for Great Bay tributaries 1995-1996



             NH 4 CONCENTRATION mg/L

             DATE                                       9 EXT GB 80      5 LMP GB 15 8 OYS 5 OYS GB 50            5 BLM GB2      I I CCh 7 CCH GB 21 5 SFR GB 22
                                                                         1
                                             10/17/95       0.02   0.19     0.02   0.14     0.05     0.02    0.10   0.03    0.03     0.75    0.24    0.12     0.03    0.07
                                                4/9/96      0.04   0.12     0.04   0.06     0.03     .0.05   0.10   0.14    0.05     0.70    0.22    0.23     0.08    0.10
                                                5/7/96      0.04   0.10     0.05   0.06     0.02     0.04    0.36   0.06    0.16     0.12    0.11    0.12     0.09    0.14
                                                6/4/96      0.09   0.13     0.06   0.11     0.06     0.15    0.03   0.05    0.03     0.34    0.27    0.12     0.18    0.17


             mean                                           0.05   0.14     0.04   0.09     0.04     0.06    0.15   0.07    0.07     0.48    0.21    0.15     0.09    0.12

             N03 CONCENTRATION mg/L
             DATE                                       9 EXT    GB 80   5 LMP   GB 15  8 OYS 5 OYS       GB 50   5 BLM   G82    11 CCh   7 CCH    GB 21  5 SFR     GB 22

                                                                         1                       1                                                                         1
                                             10/17/95       0.03   0.391    0.09   0.23     0.19     0.23    0.05   0.18    0.07     0.86,   0.54    0.39     0.55    0.50
                                                4/9/96      0.06   0.141    0.14   0.08     0.12     0.21    0.09   0.13    0.02     0.19    0.21    0.17     0.14    0.13
                                                5/7/96      0.02   0.13     0.09   0.11     0.11     0.15    0.09   0.01    0.13     0.13    0.12    0.16     0.12    0.16
                                                6/4/96      0.09   0.04     0.16   0.07     0.21     0.23    0.06   0.06    0.01     0.26    0.36    0.16     0.23    0.09


             Mean                                           0.05   0.17     0.12   0.12     0.16     0.21    0.07   0.09    0.06     0.36    0.31    0.22     0.26    0.22


             DON CONCENTRATION mg/L
             DATE                                       9 EXT    GB 80   5 LMP   GB 15  8 OYS    5 OYS    GB 50   5 BLM   GB2     11 GCh  7 CCH    GB 21  5 SFR    GB 22

                                                                                                 1                                                                         1
                                             10/17/96       0.39   0.18     0.19   0.06     0.16     0.15    0.17   0.11    0.14     0.00    0.08    0.25     0.16    0.00
                                                4/9/96      0.42   0.27     0.33   0.42     0.30     0.38    0.32   0.17    0.31     0.00    0.30    0.31     0.44    0.39
                                                5/7/96      0.27   0.25     0.20   0.15     0.16     0.24    0.06   0.21    0.09     0.14    0.07    0.15     0.17    0.16
                                                6/4/96      0.26   0.32     0.17.  0.29     0.20     0.16    0.28.  0.22    0.34     0.04    0.04    0.05     0.16    0.24

                                                                                                                                                          1
             Mean                                           0.33   0.25     0.22   0.23     0.20     0.23    0.21   0.18    0.22     0.05    0.12    0.19     0.23    0.20


             P04 CONCENTRATION mg/L
             DATE
                                                        9 EXT GB 80      5 LMP GB 15 8 OYS 15 OYS          GB 50  5 BLM   GB2 11 CCh      7 CCH G 8 21 5 SFR        GB 22
                                             10/17/95 0.012 0.098 0.006 0.042               0.007   0.006 0.061    0.007 0.035 0.107        0.066 0.050 0.034 0.032
                                                4/9/961 0.002 0.018       0.002 0.008      0.002 0.003 0.012 0.002 0.004 0.011              0.011 0.011      0.004 0.007
                                                5/7/961 0.003 0.024       0.002 0.021      0.003 0.003     0.012. 0.002    0.048 0.009      0.009 0.017       0.008  0.011





              Table 2. Dry weather data for Great Bay tributaries 1995-1996


                                                 6/4/96 0.003 0.020 0.008 0.025 0.002 0.005 0.017 0.001 0.011                         0.058 0.025 0.017        0.003 0.013

              Mean                                          0.005 0.040     0.005 0.024     0.003 0.004 0.025 0.003 0.025 0.046               0.028 0.024      0.012 0.015
              TSS CONCENTRATION mg/I

              DATE                                       9 EXT     GB 80  5 LMP    GB 15  8 OYS    5 OYS GB 50      5 BLM   GB2     11 CCh   7 GCH GB 21     5 SFR GB 22
                                                                                                                                                                 -     1
                                               10/17/95      1.60 10.00      2.40 18.20       4.80     3.80    8.20    5.80   7.40    11.40     2.80    6.80     2.00   6.20
                                                 4/9/96      1.40  28.60     1.40 44.60       4.20     3.20    5.80    1.60   3.80     2.60     2.80    5.00     1.40   6.00
                                                 5/7/96      2.00  38.80     1.60 8.60        4.80     4.40    8.60    2.60  11.20     2.40     2.60    8.40     1.60   9.00
                                                 6/4/96      2.80  70.86     1.60138.25       8.601    5.20  10.40     1.80  11.40     4.60     2.60    8.40     3.80  16.001
                                                                                                   1
              Mean                                           1.95  37.07     1.75 27.41       5.60     4.15    8.25    2.95   8.45     5.25     2.70    7.15     2.20   9.30

              % Organic

              DATE                                       9 EXT     GB 80  5 LMP G8 15     8 OYS 5 OYS       GB 50   5 BLM   GB2     11 CCh   7 CCH   GB 21   5 SFR     GB 22

                                               10/17/95     87.50 24.00     50.00 23.08     33.33,    36.84 17.07 41.38 29.73         19.30   50.00 47.06      30.00 64.52
                                                 4/9/96     57.14  13.99    85.71   13.00   28.571     3.20  27.59   75.00   31.58    38.46   57.14   28.00    85.71   23.33
                                                 5/7/96     50.00  13.40    50.00,  15.12   29.171    31.82  20.93   53.85   16.07    33.33   38.46   23.81    37.50   17.78
                                                 6/4/96     50.00  15.32    37.50   13.73   20.93     30.771 13.46   44.44   19.30    39.13   46.15   23.81    52.63   13.75

              Mean                                          61.16  16.68    55-80   16.23   28.00     25.66  19.76   53.67   24.17    32.56   47.94   30.67    51.46   29.85
              SPOM mg/L                                            I
                                                10/17/96     1.40    2.40    1.20,   4.20     1.60,    1.40    1.40    2.40   2.20     2.20     1.40    3.20     0.60   4.00
                                                 4/9/96      0.80    4.00    1.20    5.80     1.20     0.10,   1.60    1.20   1.20     1.00     1.60    1.40     1.20   1.40
                                                 5/7/96      1.00    5.20    0.80    1.30     1.40     1.40    1.80    1.40   1.80     0.80     1.00    2.00     0.60   1.60
                                                 6/4/96      1.40  10.86     0.60    5.25     1.80     1.60    1.40,   0.80   2.20     1.80     1.20    2.00     2.00   2.20
                                                                                                                    1
              Mean                                           1.15    5.61    0.95    4.14     1.50     1.13    1.55    1.45   1.85     1.45     1.30    2.15     1.10   2.30




              SALINITY ppt/ Conductivity

              DATE                                       19EXr GB80,5LMP GB15 80YS 50YS GB50,5BLM GB2 11CCh 7CCH GB21 5SFR GB22






            Table 2. Dry weather data for Great Bay tributaries 1995-1996



                                            10/17/95 180-00    15.00    75.00 10.00 170.00 230.00 25.00       95.00 22.00    245.00   90.00    6.00 104.00     6.00
                                              4/9/96 80.00       0.00   58.00   2.00   85.00 109-00 10.00     54.00 10-00     71.00   62.00    2.00    51.00   5.00
                                              5/7/96 100.00      2.00   82.00   2.00  101.00 122.00 14-00     61.00 10.00     70.00   69.00    2.00    61.00   2.00
                                              6/4/96 130.00    12.00  111.00   10.00  155.00 180.00 20.00     90.00 20.00_   111.00  110.00    6.00    96.00   8.00

             Mean                                       122.50   7.25   81.50   6.00  127.75 160.25 17.25     75.00 15.50    124.25   82.75    4.00    78.00   5.25


             Temp

             DATE                                     9 EXT    GB 80  5 LMP   GB 15  8 OYS 5 OYS      GB 50  5 BLM   GB2     11 CCh  7 CCH   GB 21 5 SFR     GB 22


                                            10/17/95    14.00  12.50    13.50  12.60   11.00    13.00  11.90 13.50    11.70,  18.00   13.00   13.20,   14.50  12.60
                                              4/9/96      6.00   7.70    6.00   6.20     5.00    5.90   6.20    5.00   6.30     6.50    5.00   7.601    5.90   7.60
                                              5/7/96    12.00  12.50    10.00  12.30   10.00    11.80  10.60  11.20   10.00   11.50   11.00   11.30    13.00  12.10
                                              6/4/96    18.50  20.90    18.00  19.80   16.00    17.00  16.10  18.20   16.30   18.00   16.50   17.00    17.50  17.00


             Mean                                       12.63  13.40    11.88  12.73   10.50    11.93  11.20  11.98   11.08   13.50   11.38   12.28    12.73  12.33


             D.O. mgA

             DATE                                     9 EXT GB 80     5 LMP GS 15    8 OYS 5 OYS      GB 50 @5 BLM   G82     11 CCh  7 CCH   GB 21  5 SFR    GB 22

                                                                                                                                                             1
                                            10/17/95      4.80   8.20    8.30 9.80       7.80    6.70   5.20    6.70   9.40     5.60    8.80   5.20     8.20   5.30
                                              4/9/96      9.80 11.20    10.60  12.40   11.20    11.00  11.60  11.40   12.40     9.80  11.20   11.90    10.80  11.90
                                              5/7/96      9.20   9.20   10.10  12.30   10.60     9.80   9.60  10.10    9.60     9.90  10.50   11.30    10.20   9.80
                                              6/4/96      6.20   6.80    7.20   6.90     8.10    6.40   7.20    7.40   6.80     7.10    6.90   8.00     8.00   7.40


             Mean                                         7.50   8.85    9.05  10.35     9.43    8.48   8.40    8.90   9.55     8.10    9.35   9.10     9.30   8.60

             % Oxygen saturation

             DATE                                     9 EXT    GB 80  5 LMP GB 15 8 OYS 15 OYS GB 50 5 BLM           GB2     11 CCh  7 CCH   GB 21  5 SFR    GB 22

                                            10/17/95      46% 84%        80%1 98%        69%     63% 56%        64%    97%      59%     82%    50%      79%    51%
                                              4/9/96      77% 93%        84% 100%        86%     87% 98%        88%   105%      79%     86%    99%      85%   101%
                                              5/7/96      84% 86%        88% 98%         93%     90% 94%        90%    91%      91%     94%    95%      96%    93%
                                                                                                                                     F  71     84%1     84%    80%
                                              6/4/96      66% 80%        76% 80%         82%     66%1 82%1      78%    77%      75Y.       %.






              Table 2. Dry weather data for Great Bay tributaries 1995-1996



              Mean                                          68% 86%          82% 94%         83%      77% 83% 80%             93%     76%     83% 82%          86% 81%

              PH

              DATE                                       9 EXT GB 80     5 LMP GB 15     80YS 50YS GB50            5 BLM   GB2     11 CCh  7CCH GB 21      5 SFR GB 22

                                               10/17/95     6.70    7.75     7.00   8.11     6.501    6.70    8.16   6.70     8.20    6.80    6.80    8.04     6.90    8.00
                                                 4/9/96     7.10    8.16     7.30   8.16     7.301    7.20    8.04   7.10     8.17    6.40    6.80    8.08     6.90    8.00
                                                 5/7/96     6.86    8.12     6.87   8.44     7.10     7.12    7.76   6.84     7.78    6.74    6.92    8.31     6.77    8.63
                                                 6/4/96     6.85    7.73     6.94   7.89     7.08     7.i2    7.67   7.04     7.64    6.69    7.03    7.87     6.94    7.63

              Mean                                          6.88    7.94     7.03   8.15     7.00     7.04    7.91   6.92     7.95    6.66    6.89    8.081    6.88    8.07

              Chlorophyll gg/L

                                                         9 E)Cr GB 80    5LMP     GB15   8 OYS    50YS GB 50       5 BLM   GB2     11CCh   7 CCH GS 21     5 SFR    GB 22

                                               10/17/95     6.65    5.51     2.64, 10.55     6.41     1.40    3.08   1.94     5.29    1.66    1.62 14.24       1.04   32.161
                                                 4/9/96     0.76    6.29     0.98 6.43       1.40     0.78    3.16   1.82     2.50    3.68    3.62    3.08     1.18    1.261
                                                 5/7/96     0.82    4.21     1.30 1.50       1.50     1.52    1.48   2.10     1.46    1.42    1.50    1.24     0.98    1.06
                                                 6/4/96     2.88    2.80     3.24   4.71     1.44     4.67    2.18   3.62     2.56    6.05    3.36    1.80     9.67    0.72

              Mean                                          2.78    4.70     2.04   5.80     2.69     2.09    2.48   2.37     2.95    3.20    2.53    5.09     3.22    8.80


              Phaeopigments

                                                         9 EXT GB 80     5 LMP GB 15      8 OYS 5 OYS GB 50        5 BLM   GB2     11 CCh  7CCH GB 21      5 SFR GB 22

                                                                 1                1
                                               10/17/95     1.72 3.18        1.93   7.38     3.47,    0.95    2.00   2.09     1.88    3.16    2.34    3.83     2.04    1.71
                                                 4/9/96       0.4 4.90       0.55   5.56     0.95     1.49    1.76   1.35     1.28    0.60    1.21    1.65     0.53    1.82
                                                 5/7/96     1.04    11.59    0.91   4.72     1.48     1.98    2.56   1.75     2.55    1.26    1.41    3.31     0.98    3.41
                                                 6/4/96     2.23    5.06     0.93   7.38     3.14     3.69    2.85   2.56     2.40    2. 5    2.73    3.97     6.42    6.43
                                                                                                                           N
                                                                                                                               5 0
                                                                                                                              146
                                                                                                                              25 6

















                                                            1.3                                       2.03    2.29   1.94     2.03    1.991   1 .
              -Mean                                              51 6.181    1.08   6.26     2.26                                                92   3.191    72_.7479T7@K@






            Table 3. Storm sample data for the Great Bay tributaries 1995-1996


             NH 4 CONCENTRATION mg/L

             DATE                                       9 EXT GB 80 5 LMP GB 15          8 OYS 5 OYS GB 50         5 BLM GB2        11 CCh  7 CCH GB 21      5SFR GB 22
                                              9/18/95       0.07   0.11,    0.12    0.08     0.02,    0.08   0.10     0.08    0.02     0.78     0.09    0.00     0.01     0.01,
                                              9/19/95       0.34   0.10     0.39    0.02     0.02     0.06   0.05     0.09    0.01     0.17     0.22    0.02     0.01     0.00
                                              11/2/95       0.12   0.15     0.05    0.45     0.02     0.08   0.12     0.03    0.04     0.54     0.41    0.24     0.09     0.12
                                              11/3/95       0.04   0.07     0.19    0.07     0.01     0.03   0.03     0.04    0.33     0.15     0.68    0.27     0.75     0.10
                                              5/17/95       0.09   0.10     0.05    0.04     0.04     0.04   0.15     0.05    0.06     0.32     0.14    0.11     0.11     0.09
                                              6/23/96       0.09   0.13     0.09    0.05     0.15     0.09   0.05     0.11    0.05     0.31     0.10    0.07     0.27     0.07


                                                   Mean     0.13   0.11     0.15    0.12     0.04     0.07   0.08     0.07    0.09     0.38     0.27    0.12     0.21     0.07



             N03 CONCENTRATION mg/L
             DATE                                       9 EXT GB 80      5 LMP GB 15     8 OYS 5 OYS GB 50         5 BLM G132       11 CCh  7 CCH GB 21      5SFR GB 22
                                              9/18/95       0.12   0.04     0.02    0.26     0.09     0.05   0.08     0.03    0.08     1.08     0.35    0.10     0.66     0.28
                                              9/19/95       0.07   0.291    0.02    0.15     0.45     0.05   0.11     0.03    0.46     1.05     0.35    0.30     0.66     0.24
                                              11/2/95       0.22   0.391    0.24    0.27     0.20     0.32   0.29     0.30    0.11,    0.30     0.34,   0.13     0.28,    0.11
                                              11/3/95       0.21   0.131    0.22    0.12     0.21     0.55   0.131    0.32    0.17     0.25     0.45    0.16     -0.27    0.29
                                              5/17/96       0.08   0.13     0.09    0.09     0.10     0.19   0.06     0.11    0.05     0.15     0.15    0.16     0.13     0.16
                                              6/23/96       0.11   0.03     0.14    0.05     0.28     0.21   0.02     0.09    0.03     0.74     0.68    0.31     0.36     0.21


                                                   Mean     0.14   0.17     0.12    0.16     0.22     0.23   0.12     0.15    0.15     0.60     0.39    0.19     0.39     0.22


             DON CONCENTRATION mg/L
             DATE                                       9 EXT    IGB 80  5 LMP    GB 15  8 OYS    5 OYS    GB 50   5 BLM     G132   11 CCh  7 CCH     GB 21  5 SFR    GB 22
                                              9/18/95       0.35   0.19,    0.27    0.04     0.24     0.28   0.07     0.32    0.27     0.00     0.30    0.37,    0.67     1.86
                                              9/19/95       0.00   0.10     0.00    0.12,    0.23     0.28   0.02     0.31    0.00     0.39     0.24    0.15     0.65     0.23
                                              11/2/95       0.07   0.21     0.05    0.00     0.23     0.33,  0.09     0.08    0.16     0.00     0.08    0.15     0.06,    0.23
                                              11/3/95       0.32   0.49     0.10    0.32     0.30     0.34   0.53     0.33    0.09     0.36     0.00    0.37     0.00     0.22
                                              5/17/96       0.22   0.24     0.14    0.19     0.23     0.27   0.16     0.14    0.19     0.04     0.16    0.18     0.18     0.19
                                              6/23/96       0.27   0.25     0.26    0.32     0.09     0.34   0.29     0.29    0.23     0.121    0.02    0.31     0.12     0.30
                                                                                                                                            1
             Mean                                           0.20   0.25     0.14    0.16     0.22     0.31   0.19     0.24    0.16     0.151    0.13    0.25     0.28     0.51

             P04 CONCENTRATION mg/L
             DATE
                                                        9 EXT    GB 80 5 LMP      GB 15 8 OYS 5 OYS        GB 50 5 BLM       G132   11CCh 7CCH        GB 21  5SFR     GB 22
             1                                                   @ 0.007 0.073 0.007 0                     2=                                  0.022 0.0531 0.005
                                              9/18/951 0.039                                          .009 0. Wo 0.011 0.045 0.027,






               Table 3. Storm sample data for the Great Bay tributaries 1995-1996

                                                  9/19/95     0.009   0.082    0.008   0.078     0.009    0.010   0.053    0.012   0.041     0.0251   0.023   0.057    0.009     0.064
                                                  11/2/95     0.012   0.084    0.011   0.040     0.014    0.019   0.079    0.010   0.032     0.0381   0.038   0.035    0.026     0.028
                                                  11/3/95     0.012   0.061    0.015   0.027     0.024    0.014   0.034    0.015   0.027     0.0351   0.040   0.034    0.016     0.027
                                                  5/17/95     0.009   0.028    0.006   0.029     0.007    0.010   0.017    0.008   0.036     0.0151   0.014   0.020    0.010     0.014
                                                  6/23/96     0.004   0.010    0.004   0.008     0.002    0.003   0.009    0.004   0.009     0.0251   0.017   0.006    0.007     0.005
                                                                                                                                                    1
                                                       Mean   0.014   0.057    0.009   0.043     0.010    0.011   0.044    0.010   0.032     0.0271   0.025   0.034    0.012     0.054

               TSS CONCENTRATION mgA
               DATE                                         9 EXT     G13 80 5 LMP     GB 15  8 OYS     5 OYS    GB 50   5 BLM    G132    11 CCh    17 CCH    G13 21 5 SFR     GB 22

                                                  9/18/95       5.60  15.00      2.40  11.60      8.40     9.00    5.60      4.20    6.40    13.00     3.60   19.00      9.60    44.67
                                                  9/19/95       3.20    8.20     1.20121.00       5.80     6.40    5.60      2.40    3.80     4.00     2.60   23.00,   10.00     24.00
                                                  11/2/95       3.20  31.00      2.60132.80       6.80     3.80    5.80      3.40    5.60     3.40     2.80   11.201     2.00     4.20
                                                  11/3/95       4.20  31.00      3.801 17.80      6.60,   19.67   10.00      5.60    7.60     9.00    40.67   29.671     2.80     9.80
                                                  5/17/96       1.60  42.67      1.201 17.60      8.60     5.80    9.40      5.20    8.80     3.60     2.80     7.401    2.80     6.801
                                                  5/18/96     15.80   60.67      2.20  19-20      9.00     4.60   19.20      2.80    6.80     3.60     4.20     9.00     2.40     7.20
                                                  6/23/96       1.80  23.80      1.40  16.40     12.20     4.00    5.80      3.20    6.80     4.60     2.80   11.00      2.60     9.60
                                                  6/24/96       2.60  16.00      2.20  27.40      9.60     5.20    8.40      2.80    9.60     4.20     5.20     6.80     2.20     5.00


                                                       Mean     4.75  28.54      2.13  20.48      8.38     7.31    8.73      3.70    6.93     5.68     8.08   14.63      4.30    13.91
                                              Storm Day 1       3.05  28.12      1.901 19.60      9.00     5.65    6.65      4.00    6.90     6.15     3.00   12.15      4.25    16.32
                                              Storm Day 2       6.45 28.97       2.35  21.35      7.75     8.97   10.80      3.40    6.95     5.20    13.17   17.12      4.35    11.50
               % Organic                                                                                                                            I                                             .I

               DATE                                         9 EXT     GB 80  5 LMP     GB 15  8 OYS     5 OYS    GB 50   5 BLM    G132    11 CCh    7 CCH     GB 21  5SFR G13 22

                                                  9/18/95     42.86   22.67    66.67   34.48     26.19    42.22   32.14    52.38   18.75     58.46    44.44   63.16    81.25     80.60
                                                  9/19/95     50.00   29.27    50.00   25.71     27.59    34.38   25.00    41.67,  31.58     55.00    53.85   72.461   86.00     88.89
                                                  11/2/95     43.75   17.20    53.85   11.59     23.53    36.84   24.14    35.29   25.00     35.29    35.71   21.431   60.00     33.33
                                                  11/3/95     47.62   16.13    42.11   16.85     24.24    19.67   14.00    32.14   21.05     20.00    10.66   13.48    50.00     22.45
                                                  5/17/96     50.00   14.84    50.00   18.80     27.91    27.59   21.28    38.46   22.73     44.44    46.15   24.32    57.14     29.41
                                                  5/18/96     11.39   14.29    54.55   13.54     24.44    39.13   14.71    64.29   23.53     38.89    38.10   24.44    41.67     25.00
                                                  6/23/96     55.56   13.45    28.57   18.29     19.67    17.24   17.24    31.25   11.76     43.48    35.71   18.18    61.54     20.83
                                                  6/24/96     61.54   17.50    72.73   16.79     16.67    46.15   16.67    35.71   14.58     38.10    38.46   29.41    54.55     36.00


                                                       Mean   45.34   18.17    52.31   19.51     23.78    32.90   20.65    41.40   21.12     41.71    37.89   33.36    61.52     42.06
                                              Storm Day 1     48.04   17.04]   49.77[ 20.79      24.33    30.97   23.70    39.35   19.56     45.42    40.50   31.77    64.98     41.04
                                              Storm Day 2,    42.64   19.301   54.85118.22       23.24    34.831  17.60F 43,45-    22.691    38.00    35.27   34.95    58.06     43.09







             Table 3. Storm sample data for the Great Bay tributaries 1995-1996



              SPOM mg/L                                  9 EXT GB 80     5 LMP GB 15      8 OYS 5 OYS G13 50       5 BLM G132 11 CCh         7 CCH GB 21      5SFR G13 22

                                               9/18/96      2.40    3.40     1.60   4.00     2.20     3.80    1.80     2.20   1.20     7.60     1.60   12.00     7.80    36.00
                                               9/19/95      1.60    2.40     0.60   5.40     1.60,    2.20    1.40     1.00   1.20     2.20     1.40   16.67     8.60    21.33
                                               11/2/95      1.40    5.33     1.40   3.80     1.601    1.40    1.40     1.20   1.40     1.20     1.00    2.40     1.20      1.40
                                               11/3/95      2.00    5.00     1.60   3.00     1.601    3.87    1.40     1.80   1.60     1.80     4.34    4.00     1.40      2.20
                                               5/17/96      0.80    6.33     0.60   3.31     2.401    1.60    2.00     2.00   2.00     1.60     1.29    1.80     1.60      2.00
                                               5/18/96      1.80    8.67     1.20   2.60     2.201    1.80    2.82     1.80   1.60     1.40     1.60    2.20     1.00      1.80
                                               6/23/96      1.00    3.20     0.401  3.00     2.401    0.69    1.00     1.00   0.80     2.00     1.00    2.00     1.60      2.00
                                               6/24/96      1.60    2.80     1.60   4.60     1.60     2.40    1.40     1.00   1.40     1.60     2.00    2.00     1.20      1.80


                                                    Mean    1.57    4.64     1.13   3.71     1.95     2.22    1.65     1.50   1.40     2.42     1.78    5.38     3.05      8.57
                                                  Day 1     1.40.   4.57     1.00   3.53     2.15     1.87    1.55     1.60   1.35     3.10     1.22    4.55     3.05    10.35
                                                  Day 2     1.75    4.72     1.25   3.90     1.75     2.57    1.76     1.40   1.45     1.75     2.33    6.22     3.05      6.78
              SALINITY ppt

              DATE                                       9 EXT    GB 80  5 LMP    G13 15  8 OYS    5 OYS     GB 50 5 BLM GB2         I I CCh 7 CCH    GB 21 5 SFR      GB 22


                                               9/18/95    121.00 24.00    140.00, 26.00    250.00, 295.00    27.00  180.00   27.00   202.00 182.00 21.00      251.00     21.00
                                               9/19/95    167.00 23.20    138.00125.00     222.001  240.00   28.00  172.00   28.00   201.00   185.00   21.00  180.00     22.00
                                               11/2/95    122.00    3.50    80.00   3.50   103.00   130.00   19.50    82.00  19.50   222.00   172.00    4.50  172.00       5.50
                                               11/3/95              4.50            7.20   132.00   201.00   12.00  150.00    9.00   135.00   130.00    0.00  140.00       0.00
                                               5/17/96              0.00            0.00                     10.00           11.20                      0.00               0.00
                                               5/18/96              0.00            0.00                      8.00            7.00                      0.00               0.00
                                               6/23/96    144.00   23.00  123.00   16.00   199.00   213.00   23.00  148.00   22.00   137.00   130.00    7.00  142.00       9.00
                                               6/24/96    170.00    11.00 120.00   11.00   203.00   209.00   23.00    89.00  23.00   145.00   142.00    4.00  111.00       5.00


                                                    Mean  144.80    11.15 120.20   11.09   184.83   214.67   18.81  136.83   18.34   173.67   156.83    7.19  166.00       7.81
                                            Storm Day 1   121.50    9.17  110.00   14.75   176.50   212.50   23.25  131.00   23.25   212.00   177.00   12.75  211.50     13.25
                                            Storm Day 2 167.00      9.23  138.00   16.10   177.00   220.50   20.00  161.00   18.50   168.00   157.50   10.50  160.00     11.00


              Temp

              DATE                                       9 EXT GB 80     5 LMP    G8 15 8 OYS 5 OYS          GB 50 5 BLM GB2         11 CCh  7 CCH G13 21 5 SFR GB 22

                                                                         1        1                1         1
                                               9/18/95 17.00 18.00 18.00 18.20 13.50                 13.00 17.00      17.00 17.00      17.50   17.00 18.00 17.90         18.00
                                               9/19/95 16.00 18.20           17.201 19.10 15.00       15.20  17.00    17.00 16.80      16.00   16.20 18.90 16.00         18.50
                                               11/2/95      8.20 9.50        9,00T 9.00      7.90     7.90   10.00     9.50 9.50,      7.OOT 6,80- 8.70          8.40      9.20






             Table 3. Storm sample data for the Great Bay tributaries 1995-1996

                                               11/3/95       8.50   9.00     8.40 9.00        8.10     6.10   9.60    10.00    9.90     8.20     9.00    8.301    9.00     8.70
                                               5/17/96     12.50   13.00    13.00   12.90   12.20    12.90   11.70    12.90   12.00    13.00    12.20  12.001   12.90     12.20
                                               5/18/96     14.20   14.00    13.80   13.90   13.40    13.70   12.00    14.30   11.80    13.00    13.10  12.80    13.00     13.00
                                               6/23/96     21.90   21.50    22.90   21.50   18.90    21.80   20.00    21.70   20.00    21.80    20.40  21.50    22.10     22.00
                                               6/24/96     22.90   22.00    21.50. 22.00    18.50    19.50   20.00    20.30   20.00    19.80    20.60  22.00    21.10     22.00

                                                    Mean   15.15   15.65    15.48   15.70   13.44    13.76   14.66    15.34   14.63    14.54    14.41  15.28    15.05     15.45
                                            Storm Day 1    12.57   13.50    13.33   13.37   11.20    11.27   12.90    13.13   12.83    12.50    12.00  12-901   13.07     13.13
                                            Storm Day 2    12.90   13.73    13.13   14.00   12.17    11.67   12.87    13.77   12.83    12.40    12.77  13.331   12.67     13.40

              D.O. mgA

              DATE                                       9 EXT    GB 80   5 LMP GB 15     80YS 150YS GB50 513LM G132                11 CCh 7 CGH      GB 21    5 SFR   GB 22

                                               9/18/95       6.20   6.40     4.40,   8.60     7.80     6.40   8.20,    4.00    8.20     5.20     6.20    9.20     9.20     7.80
                                               9/19/95       5.50   6.30     5.201   9.50     7.40     4.80   8.90     5.80    8.60     4.50     6.20  10.70    11.60     11.90
                                               11/2/95       8.80   9.20    10.401  10.00     8.40     8.40   8.50     9.30    8.60    10.20    10.40    9.80   10.10      9.30
                                               11/3/95     10.28    9.40    11.101  10.40     9.20     9.90   9.38     9.70    9.63    10.30    11.30  12. 14   10.90     11.76
                                               5/17/96       8.20  10.27     9.601  11.35     9.201    9.00   8.89     9.00    9.17     9.20     9.40  10. 64     9.60    10.63
                                               5/18/96       9.60   9.40     9.801  10.60     9.701    8.40   8.95     9.00    9.2 0    9.051    9.35  10.30    10.20     10.20
                                               6/23/96       7.49   6.80     5.33    7.00     7.30     5.90   7.60     5.64    7.40     4.10     6.90    7.00     6.77     7.10
                                               6/24/96       6.57   7.60     6.77    8.20     6.70     7.45   7.70     6.60    7.90     4.97     6.33    7.80     7.38     7.90

                                                    Mean     7.83   8.17     7.83    9.46     8.21     7.53   8.52     7.38    8.59     7.19     8.26    9.70     9.47     9.57
                                            Storm Day 1      7.67   8.17     7.43.   9.24     8.18     7.43   8.30     6.99    8.34     7.18     8.23    9.16     8.92     8.71
                                            Storm Day 2      7.99   8.18     8.22    9.68     8.251    7*64   8.73     7.78    8.83     7.21     8.30  10.24    10-02     10.44

              % Oxygen saturation

              DATE                                       9 EXT GB 80      5 LMP     GB 15 8 OYS    5 OYS     GB 50  5 BLM     G132   11 CGh  7 CCH    GB 21 5SFR       GB 22

                                                                                    1              1                1
                                               9/18/95       63%    78%      46%    104%      75%      49%   100%      41%    100%      54%      63%   108%,      96%     115%.
                                               9/19/95       55%    76%      53%    117%      72%      47%   109%      59%    105%      45%      62%   128%1    116%      140%
                                               11/2/95       73%    81%      88%     88%      70%      70%    84%      81%     85%      84%      84%     86%      84%      82%
                                               11/3/95       87%    83%      94%     93%      76%      82%    89%      85%     90%      86%      96%   104%       93%     102%
                                               5/17/96       76%    98%      90%    108%      84%      84%    87%      84%,    91%      86%      86%     99%      89%      99%
                                               5/18/96       93%    90%      94%    102%      92%      81%    87%      88%     .90%     88%      88%     96%      96%      96%
                                               6/23/96       83%    86%      60%     88%      83%      66%   100%      62%     97%      46%      77%     86%      76%      86%
                                                                                                             16
                                                                                                                7   0
                                                                                                                    0


                                                                                                              8. 52
                                                                                                              S.3   0
                                                                                                              8_ 73












                                               6/24/96       76%    91%      77%     98%      71%      81%    97%      72%     99%      54%      70% @@i %1       82%      92%







              Table 3. Storm sample data for the Great Bay tributaries 1995-1996


                                                        Mean     76% 85%           75% 100%          78%      70% 94%           72% 95%           68%       78% 100%          92% 102%
                                               Storm Day 1       74% 86%           71% 97%           78%      67% 93%           67% 93%           68%       77% 95%           86%       96%
                                               Storm Day 2       78%     85%       80% 103%          78%      73%     96%       76%     96%       68%       79% 105%          97%     108%
               pH

               DATE                                          9 EXT     G13 80  5 LMP G13 15      8 OYS    5 OYS     GB 50   5 BLM     G132    11 CCh    7 CCH GB 21       5 SFR    G13 22


                                                   9/18/95       7.10    7.74      6.91    8.11      7.22     7.29    8.18      7.12    7.94      6.88      7.24    7.73      9.12      8.34
                                                   9/19/95       7.11    7.66      6.94    8.06      7.26     7.38    8.16      7.09    7.83      6.84      7.11    8.09      9.67      8.32
                                                   11/2/95       6.79    7.23      6.82    7.18      6.90     7.03    7.76      6.88    7.78      6.71      7.10    7.26      6.91      7.27
                                                   11/3/95       6.64    6.97      6.75    7.14      6.54     6.86    7.31      6.88    7.32      6.64      7.08    6.85      6.89      6.69
                                                   5/17/96       6.77    7.11      6.86    7.00      6.91     7.04    7.35      6.99    7.40      6.71      7.01    7.00      6.85      6.76
                                                   5/18/96       6.97    7.02      6.96    7.02      7.08     7.18    7.35      6.92    7.39      6.81      7.03    6.94      6.96      6.84
                                                   6/23/96       7.27    7.55      7.09.   7.68      7.40.    7.30    7.76      7.06    7.71      6.90      7.11    7.41      7.21      7.61
                                                   6/24/96       6.91    7.32      6.84    7.63      7.071    7.23    7.72      7.04    7.70      6.59      7.12    7.31      6.93      7.72


                                                        Mean     6.95    7.33      6.90    7.48      7.05     7.16    7.70      7.00    7.63      6.76      7.10    7.32      7.57      7.44


               Chlorophyll gg/L

               DATE                                          9 EXT GB 80       5 LMP     GB 15   8 OYS .5 OYS GB 50         5 BLM GB2         11 CCh    7 CCH    G13 21   5 SFR    GB 22


                                                   9/18/95       3.48    3.90      8.01   11.11      3.54    22.05    3.14      6.03    1.94     89.87      6.49  29.94    116.12    170.86
                                                   9/19/95       4.73    4.75      2.60   11.69      1.64    10.55    3.00      4.23    2.62     20.13      8.51  73.89    106.57     56.97
                                                   11/2/95       4.83    3.07      1.06    0.94      0.84     1.76    1.20      0.98    1.62      1.32      1.06    2.96      0.88      2.90
                                                   11/3/95       1.88    1.16      1.30    1.48      0.62     1.74    0.88      0.92    0.90      0.98      1.37    1.34      0.94      1.28
                                                   5/17/96       1.72    2.07      1.16    0.94      1.66     1.84    1.34      1.56    1.20      2.74      2.14    1.42      1.14      1.04
                                                   5/18/96       3.82    1.40      1.28    1.52      1.32.    0.72    1.06      1.34    1.24      2.68      2.54    2.10      1.28      1.06
                                                   6/23/96       4.69    7.09      2.84    6.23      1.80    14.24    2.82      2.86    2.04      5.59      5.91    2.72      7.41      3.40
                                                   6/24/96       10.73   7.61      15.081  5.45      1.78    37.03-   3.98      3.20    2.28      4.99      5.77    4.13      2.00      4.09

                                                        Mean     4.48    3.88      4.17    4.92      1.65    11.24    2.18      2.64    1.73     16.04      4.22  14.81      29.54    30.20
                                               Storm Day 1       3.68    4.03      3.27    4.81      1.96     9.97    2.13      2.86    1.70     24.88      3.90    9.26.    31.39    44.55
                                               Storm Day 2       5.29    3.73      5.07    5.04      1.34    12.51    2.23      2.42    1.76      7.20      4.55  20.37      27.70    15.85
                                                                                                                                                        1

               Phaeopigments gg&

               DATE                                           9 EXT I GB 80 5 LMP        IGB15180YS 50YS            IGB 501           IG132    11CCh 7CCH IGB2115SFR IGB22






              Table 3. Storm sample data for the Great Bay tributaries         1995-1996


                                                           -                                                                                                    --i-2.52      34.21
                                                9/18/95       1.91   2.16      2.38   4.52     2.41     7.89    1.45     4.08    0.27     15.71     3.45   6.31 --
                                                9/19/95       2.84   3.58      1.06   5.21     1.58     5.01    1.47     2.74    1.25     13.71     3.38   8.95      7.64     8.39
                                                11/2/95       3.40   7.98      9.85   3.21     0.44     1.22    0.72     1.00    0.73     1.20      1.74   1.75      1.04     1.11
                                                11/3/95       2.01   3.48      1.42.  3.12     1.94     2.00    0.87     1.42    0.98     2.00      4.05   3.52      1.81     3.08
                                                5/17/96       1.18   8.19      1.24   4.40     2.80     2.15    1.70     1.94    2.72     0.99      1.17   3.431     1.51     2.59
                                                5/18/96       2.99   7.30      1.66   3.08     2.07     2.22    1.90     2.29    1.49     1.87      1.75   2.661     1.34     2.61
                                                6/23/96       1.68   5.70      1.74   3.92     2.81     6.16    2.35     2.21    1.52     8.33      3.76   3.121     7.32     3.86
                                                6/24/96       0.56   6.93      0.21   2.84     2.45.    6.18    1.68,    0.10    1.17     2.78      3.99   1.861     2.44     1.54
                                                                                                    1


                                                     Mean     2.07   5.67      2.45   3.79     2.06     4.10    1.52     1.97    1.27     5.82      2.91   3.95      4.45     7.17
                                             Storm Day 1      2.04,  6.01,     3.80,  4.01     2.12     4.361   1.55     2.31    1.31,    6.56,     2.53,  3.65      5.60     10.44
                                             Storm Day 21     2.101  5.321     1.091  3.56     2.01     3.851   1.481    1.641   1.221    5.091     3.291  4.251     3.311    3.91






           Table 4. Comparison of storm vs dry weather samples 1995-1996 for selected stations and
           parameters using Welches West for samples with unequal sd

               Parameter         Station               Significance                Interpretation


               NH4               11 CCH                     NS
                                 5 SFR                      NS
                                 7CCH                       NS
                                 9 EXT                      NS


               N03               11 CCH                     NS
                                 5 SFR                      NS
                                 7 CCH                      NS
                                 9 EXT                   P= .041            STORM > DRY


               DON               GB 22                      NS


               P04               GB 80                      NS
                                 GB 15                      NS
                                 GB 50                      NS
                                 GB 21                      NS
                                 GB 22                      NS
                                 11 CCH                     NS
                                 9EXT                       NS


               TSS               7CCH                       NS
                                 5 OYS                      NS
                                 9 EXT                      NS
                                 GB 21                    P=.042            STORM    DRY
                                 GB 22                      NS
                                 5SFR                       NS


               SPOM              11 CCH                     NS
                                 GB 21                      NS
                                 GB 22                      NS
                                 5 SFR                      NS


               CHL A             5 OYS                      NS
                                 11 CCH                     NS
                                 GB 21                      NS
                                 5 SFR                      NS
                                 GB 22                      NS


               % 02 SAT          5 BLM                      NS
                                 11CCH                      NS
                                 GB 21                      NS
                                 JGB 22                     NS
                                 19 E)(T                    NS





        Table 5. Station comparisons using ANOVA for dry weather, storm and all samples
        combined 1995-1996
              Data        Parameter    Significance (P)                  Pairs

         Dry Weather         NH4            <.0001      11 CCH >all other stations

                             N03             NS


                             DON             NS


                             P04             NS


                             TSS            <.0001      GB 15 and 80 > all other stations


                             SPCM           <.0001      GB 15 and 80 > 9 EXT, 5 Imp, 5 OYS
                                                        GB80 >5 SFR, 7CCH, 5 BLM, 11 CCH, GB 2
                                                        GB 50, GB 21, GB 22


                          % 02 SAT           NS


                             CHL A           NS


         Storm samples       NH4            <.005       11 CCH > all except 7 CCH and 5 SFR

                             N03            <.0001      11 CCH > all except 7CCH


                             DON             NS


                             P04             NS


                             TSS            <.0001      GB 80 > all except GB 21, 22, 15
                                                        GB 15 > all except GB 21, 22, 80

                             SPCM           0.0193      GB 22> all except GB 21, 15, 80
                                                        NS if 9/18 and 9/19 elimanated



                           % 02 SAT         <.0001      11 CCH < all fidal except GB 80
                                                        11 CCH< 5SFR


                                                        5 OYS < all tidal except GB 80
                                                        5 OYS < 5 SFR


                                                        5 BLM < GB 2, 15, 21, 22, 50


                                                        5 LMP < GB 15, 21, 22

                                                        19 EXT < Gb 15, 21, 22






           Table 5. Station comparisons using ANOVA for dry weather, storm and all samples
           combined 1995-1996


                                                             8 OYS < GB 15, 21, 22


                                                             7 CCH < Gb 15, 21, 22


                                CHL A             NS


            95-96 D &S           NH4            <.0001       11 CCH > all except 7 CCH
                                                             7 CCh > 8 OYS


                                 N03            <.0001       5 SFR . GB 50 and 9 EXT
                                                             7 CCH > GB 2,5 LMP and 5 BLM
                                                             11 CCH >all except 5 SFR and 7 CCH


                                 DON              NS


                                 P04            <.0001       GB 80 > all tw except 7 and 11 CCH


                                 TSS            <.0001       GB 80 > all other stations
                                                             GB 15 > all except GB 80

                                SPOM            0.0017       GB 22. all except GB 15, GB 80, GB 21

                              % 02 SAT          < .0001      11 CCH < 5 SFR, GB 2, 15, 21, 22, 50
                                                             50YS<GB2,15,21,22,50and5SFR
                                                             9 EXT< GB 2, 15, 21
                                                             5 BLM < GB 2. 15, 21
                                                             5 LMP < GB 15


                                CHL A             NS





         Table 6. Interannual comparison of storm and dry data combined for the three project years
         using Welch's Mest for samples with unequal Sd
          Data                         Para neter      Station        Significance Interpretation
          Dry and Storm combined
          93-94 vs 94-95 vs 95-96      NH4             5 LMP          NS
                                                       GB 15          NS
                                                       7 CCH          NS
                                                       11 CCH         NS


                                       N03             GB 80          NS
                                                       GB 15          P=  .0184      95-96 > 94-95
                                                       8 OYS          NS
                                                       11 CCH         NS
                                                       5 SFR          NS
                                                       GB 22          P-  .0342      95-96>94-95


                                       DON             GB 22          NS


                                       P04             GB 80          NS
                                                       GB 15          NS
                                                       GB 2           NS
                                                       GB 21          NS
                                                       GB 22          NS


                                       TSS             GB 21          NS
                                                       19 EXT         I NS           I






           Table 7. Cumulative Database for selected parameters for d          ry weather samples 1993-1996


           NH4 Concentration mg/L                                         I

           DATE                             9 EXT GB 80   5 LMP   GB 15   8 OYS  5 OYS GB 50     5 -BLM  G132    11 CCh  7 CCH    GB 21   5 SFR GB 22

                                8/24/93     0.090  0.090   0.090   0.090          0.090   0.090   0.090   0.090           0.090   0.090   0.090   0.090
                                  9/7/93    0.090  0.090   0.090   0.0901         0.0901  0.090   0.090   0.0901          0.090   0.090   0.090   0.090
                                10/5/93     0.090  0.200   0.090   0.0901         0.090   0.090   0.090   0.090           0.090   0.090   0.400   0.100
                                11/2/93     0.090  0.090   0.090   0.090          0.090   0.100   0.090   0.090           0.110   0.100   0.130   0.110
                                12/20/93    0.090  0.210   0.090   0.090          0.090   0.090   0.090   0.090           0.240   0.190   0.1101  0.130
                                4/19/94     0.090          0.090   0.090          0.090   0.090   0.090   0.090           0.090           0.090   0.090
                                5/17/94     0.090          0.090   0.090          0.090   0.090   0.090   0.0901          0.200   0.100   0.200   0.090
                                6/14/94     0.090  0.100   0.090   0.090          0.090   0.090   0.090   0.0901          0.100   0.090   0.300   0.200
                                7/26/94     0.0621 0.053   0.181   0.1011 0.076   0.059   0.062   0.124   0.044   0.086   0.062   0.034   0.092   0.127
                                8/30/94     6.027  0.063   0.019   0.033  0.031   0.021   0.064   0.060   0.012   0.048   0.033   0.056   0.013   0.043
                                10/24/94    0.007  0.055   0.020   0. 0 1'9 0.016 0.018   0.087   0.016   0.001   0.237   0.113   0.113   0.114   0.137
                                11/8/94     0.249  0.076   0.024   0.077  0.022   0.062   0.091   0.087   0.076   0.180   0.122   0.064   0.169   0.106
                                3/21/95     0.019          0.042          0.016   0.021   0.010   0.025   0.029   0.222   0.168   0.125   0.138   0.050
                                4/18/95     0.042, 0.093   0.015   0.047, 0.053   0.139   0.265,  0.654   0.144,  0.281   0.189   0.1661  0.260   0.118
                                  5/2/95    0.032  0.150   0.031   0.014  0.084   0.043   0.135   0.035   0.068   0.244   0.132   0.134   0.150   0.142
                                  6/6/95    0.050  0.182   0.052   0.107  0.081   0.245   0.325   0.033   0.015   0.410   0.202   0.124   0.203   0.160
                                10/17/95    0.032  0.386   0.085   0.230  0.047   0.232   0.050   0.176   0.066   0.754   0.545   0.385   0.547   0.499
                                  4/9/96    0.062  0.138   0.135   0.076  0.034   0.211   0.089   0.127   0.018   0.699   0.205   0.166   0.142   0.130
                                  5/7/96    0.021  0.128   0.086   0.113  0.025   0.152   0.094   0.010   0.133   0.117   0.123   0.155   0.119   0.155
                                  6/4/96    0.090  0.035   0.16110.067    0.057   0.231   0.062   0.065   0.014   0.338   0.362   0.155   0.2291  0.094

           Mean NI-14 Dry                   0.071  0.126   0.079   0.084  0.045   0.108   0.103   0.107   0.067   0.301   0.163   0.128   0.179   0.133

           N03 Concentration mg/L

           DATE                             9 EXT GB 80 5 LMP GB 15       8 OYS 5 OYS GB 50      5 BLM   GB2     11 CCH 7CCH      GB 21   5 SFR  GB 22
                                                                                                                         1
                                8/24/93 0.078 0.120 0.018 0.050                   0.018 0.040 0.018 0.0181               10.870 0.120.0.630 0.060






          Table 7. Cumulative Database for    selected parameters for dry  weather samples 1993-1996


                               9/7/93   0.018  0.018  0.018  0.018         0.018  0.020   0.018  0.018          0.570 -0.018  1.200  0.018
                              10/5/93   0.030  0.190  0.260  0.130         0.180  0.070   0.360  0.060-         0.780  0.400  1.350  0.420
                              11/2/93   0.060  0.360  0.070  0.100         0.330  0.070   0.120  0.080          0.360  0.260  0.310  0.260
                             12/20/93   0.180  0.060  0.100  0.110         0.230  0.240   0.120  0.210          0.170  0.160  0.170  0.160
                              4/19/94   0.080        10.090  0.0801        0.160  0.120   0.045  0.1401         0.140  0.150  0.130  0.140
                              5/17/94   0.050         0.060  0.060         0.130  0.130   0.080  0.0701         0.160  0.130  0.150  0.120
                              6/14/94   0.080  0.140  0.100  0.140         0.130  0.1001  0.060  0.1001         0.560  0.370  0.460  0.310
                              7/26/94   0.016  0.033  0.000  0.003  0.325  0.000  0.0001  0.003  0.003   0.745  0.459  0.020  0.714  0.087
                              8/30/94   0.026  0.115  0.000  0.031  0.347  0.019  0.0241  0.017  0.025   0.581  0.767  0.008  0.646  0.001
                             10/24/94   0.090  0.111  0.025  0.011  0.154  0.192  0.047   0.025  0.051   0.458  0.490  0.295  0.166  0.103
                              11/8/94   0.099  0.111  0.053  0.048  0.134  0.248  0.078   0.059  0.074   0.401  0.474  0.182  0.235  0.098
                              3/21/95   0.105         0.071         0.058  0.234  0.110   0.110  0.140   0.102  0.149  0.160  0.075  0.113
                              4/18/95   0.020  0.143  0.066  0.108  0.065  0.145  0.044   0.088  0.074   0.157  0.155  0.175  0.101  0.130
                               5/2/95   0.0541 0.076  0.064  0.0071 0.106  0.165  0.0141  0.133  0.0331  0.195  0.292  0.188, 0.199  0.139
                               6/6/95   0.093  0.252  0.136  0.07610.225   0.188  0.011   0.071  0.025   0.521  0.635  0.272  0.242  0.148
                             10/17/95   0.032  0.386  0.085  0.230  0.188  0.232  0.050   0.176  0.066   0.863  0.545  0.385  0.547  0.499
                               4/9/96   0.062  0.138  0.135  0.076  0.120  0.211  0.089   0.127  0.018   0.194  0.205  0.166  0.142  0.130
                               5/7/96   0.021  0.128  0.086  0.113  0.113  0.152  0.094   0.010  0.133   0.130  0.123  0.155  0.119  0.155
                               6/4/96   0.090  0.035  0.161  0.067  0.210  0.231  0.062   0.065  0.014   0.260  0.362  0.155  0.229  0.094

          Mean N03 Dry                  0.064  0.142  0.080  0.077  0.17110.161   0.071   0.085  0.068   0.384  0.413  0.189  0.391  0.159

           P04 Concentration mg)L

          DATE                         9 EXT  GB 80  5 LMP  GB 15,8 OYS    5 OYS  GB 50 5 BLM    GB2 11 CCH 7CCH      GB 21 5SFR     GB 22

                              8/24/93   0.004  0.041  0.004  0.059         0.008  0.055   0.005  0.038          0.018  0.041  0.007  0.045
                               9/7/93   0.001  0.056. 0.001  0.068         0.001  0.0491  0.001  0.033-         0.001  0.030  0.017  0.034
                              10/5/93   0.001  0.066  0.002  0.075         0.002  0.0441  0.004  0.0211         0.045  0.0241 0.031  0.022
                              11/2/93   0.007  0.034  0.009  0.020         0.003  0.032   0.002  0.023          0.033  0.0221 0.019  0.023
                             12/20/93   0.032  0.069  0.025  0.025         0.034  0.052   0.042  0.081          0.061  0.036  0. 026 0.036
                              4/19/94   0.001-        0.006  0.004         0.002  0.007   0.001  0.002          0.029  0.008  0.012  0.010
                              5/17/941  0.0041       10.0011 0.0071        10.001 0.022   0.001  0.011         10.018  0.014  0.0071 0.01






          Table 7. Cumulative Database for       selected parameters for dry    weather samples 1993-1996


                                6/14/94   0.004   0.030  0.009   0.027          0.006  0.032   0.010   0.023           0.039   0.020   0.024  0.026
                                7/26/94   0.006   0.030  0.008   0.044  0.008   0.003  0.051   0.004   0.040   0.010   0.005   0.040   0.010  0.039
                                8/30/94   0.007   0.052  0.004   0.044  0.008   0.006  0.047   0.012   0.042   0.046   0.027   0.041   0.011  0.034
                              10/24/94    0.012   0.059  0.007   0.033  0.011   0.014  0.043   0.006   0.028   0.050   0.046   0.033   0.012  0.034-
                                11/8/94   0.014   0.052  0.0081  0.033  0.010   0.012  0.049   0.038   0.031   0.048   0.044   0.028   0.016  0.036
                                3/21/95   0.004   0.000  0.004   0.000  0.020   0.006  0.016   0.006   0.0091  0.019   0.019   0.0151  0.006  0.006-
                                4/18/95   0.002   0.020  0.002   0.011  0.003   0.025  0.011   0.001   0.006   0.026   0.025   0.015   0.005  0.010
                                 5/2/95   0.005   0.026  0.003   0.010  0.006   0.006  0.014   0.003   0.002   0.038   0.050   0.024   0.004  0.014
                                 6/6/95   0.0181  0.045  0.013   0.022  0.011   0.014  0.010   0.009   0.009   0.087   0.071   0.026   0.008  0.019
                              10/17/95    0.012   0.098, 0.006   0.042, 0.007   0.006  0.061,  0.007   0.035   0.107   0.066   0.050   0.034  0.032
                                 4/9/96   0.002   0.018  0.002   0.008  0.002   0.003  0.012   0.002   0.0041  0.011   0.011   0.011   0.0041 0.007
                                 5/7/96   0.003   0.024  0.002   0.021  0.003   0.003  0.012   0.002   0.048   0.009   0.009   0.017   0.008  0.011
                                 6/4/96   0.003   0.020  0.008   0.025  0.002   0.005  0.017   0.001   0.011   0.058   0.025   0.017   0.003  0.013


           Mean P04 Dry                   0.007   0.0411 0.006   0.0291 0.008   0.008  0.032   0.008   0.025   0.042   0.032   0.026   0.013  0.023

           TSS Concentration mg/L                                                                                    .1

           DATE                          9 EXT   GB 80 5 LMP    GB 15  8 OYS 5 OYS     GB 50 5 BLM    GB 2 11 CCH 7 CCH       GB 21   5 SFR  GB 22


                                8/24/93    1.50 41.50      0.09  24.50           2.50  40.001    1.50   8.00            7.00   20.50   -9.00  19.00
                                 9/7/93    4.00     8.50   3.00    6.00          1.00    8.001   5.50  25.00            7.00   11.00    1.00  13.50
                                10/5/93    3.00   57.00    5.00  37.00           6.00  52.00     5.00  51.00            3.00   30.00    3.00  36.00
                                11/2/93    2.00136.00      0.90  43.00           0.09  70.00     1.00  14.00            1.00   19.00    3.00  87.00
                              12/20/93     4.50   17.00    4.00  19.00           4.00    5.00    3.20   5.00            4.80    5.00    4.40    6.00
                                4/19/94    1.00            0.90  12.001          1.00    4.00    1.00   3.00            2.00    3.00    0.90    1.00
                                5/17/94    2.00            1.00  12.501          4.50    5.50    2.00   5.50            4.00    6.00    4.00    7.00
                                6/14/94    2.00   35.00    3.00    7.001         9.00    4.50    2.00   5.50            2.00    5.50    3.00    3.50
                                7/26/94    2.00   27.80    3.20 6.00      8.40   3.20122.80      1.40   9.00     5.00   3.80    6.60    7.80  13.60
                                8/30/94    1.80     6.80   1.60  18.20    7.11   4.40 5.40       2.80   4.60     6.80   3.80   19.00   12.40    7.00
                              10/24/94     1.80   10.80    1.20@   6.20   2.80   3.80 4.60       2.33   6.60     1.80   1.60    5.60    0.80    2.60
                                11/8/94    1.20   30.20    1.60  16.20    2.20   2.40    9.60    3.201 15.40     2.80   1.80    3.00    1.20    4.80
                                3/21/951   1.201           1.601       1  5.00   3.20    4.601   2.20T -5,601    3.201  3.801   6.401   1.601 10. 4pj





           Table 7. Cumulative Database for selected parameters for dry weather samples 1993-1996


                                 4/18/95     1.00  80.00     1.20  37.40    3.40     3.60   5.00    2.00    5.60     2.60   2.40    6.20    1.80   29.20
                                  5/2/95     2.40  23.40     3.20  18.20    4.20     4.60   8.00    2.60    4.40     3.80   3.00    4.80    2.60    9.40
                                  6/6/95     1.80  24.40     1.40  10.00   10.80     5.40   9.00    2.20   14.20     6.60   2.60    4.80    2.80    9.60
                                10/17/95     1.60  10.00     2.40  18.20    4.80     3.80   8.20   -5.80    7.40   11.40    2.80    6.80    2.00    6.20
                                  4/9/96     1.40  28.60     1.40  44.60    4.20     3.20   5.80    1.60    3.80     2.60   2.80    5.00    1.40    6.00
                                  5/7/96     2.00  38.80     1.60     8.60  4.80     4.40   8.60    2.60   11.20     2.40   2.60    8.40    1.60    9.00
                                  6/4/96     2.80  70.86     1.60  38.25    8.60     5.20  10.40    1.80   11.40   - 4.60   2.60    8.40    3.80   16.00

            Mean TSS Dry                     2.05  32.16     1.99  20.151   5.53     3.76  14.551   2.59   10.81     4.471  3.22    9.25    3.41   14.84

            DON CONCENTRATION mg/L

            DATE                            9 EXT  GB 80  5 LMP    GB 15  8 OYS    5 OYS  GB 50 5 BLM     G132    11 CCh  7 CCH   GB 21   5 SFR    GB 22
                                 7/26/94    0.242  0.254.  0.149   0.266   0.029   0.221   0.1981  0.193   0.1831  0.159   0-.129  0.346   0.364   0.186
                                 8/30/94    0.527  0.412   0.371   0.396   0.372   0.390   0.501   0.453   0.000   0.650   0.610   0.386   0.871   0.406
                                 10/24/94   0.342  0.464   0.185   0.341   0.160   0.270   0.556   0.239   0.188   0.036   0.077   0.252   0.120   0.251
                                 11/8/94    0.172  0.413   0.232   0.375   0.314   0.290   0.141   0.235   0.120   0.250   0.194   0.394   0.296   0.366
                                 3/21/95    0.130          0.240           0.250   0.360   0.470   0.330   0.400   0.400   0.420   0.410   0.290   0.330
                                 4/18/95    0.168  0.1151  0.069   0.0451 0.071    0.000   0.0001  0.000   0.000   0.000, 0.000    0.000,  0.009   0.032
                                  5/2/95    0.215  0.194   0.184   0.2091  0.101   0.152   0.2111  0.082   0.079   0.141   0.096   0.1881  0.191   0.160
                                  6/6/95    0.548  0.158   0.357   0.43310.282     0.126   0.2441  0.074   0.052   0.225   0.020   0.043   0.000   0.188
                                 10/17/96   0.391  0.180   0.189   0.0591  0.155   0.151   0.174   0.115   0.141   0.000   0.084   0.245   0.155   0.000
                                  4/9/96    0.418  0.271   0.329   0.4221  0.296   0.381   0.325   0.169   0.3111  0.000   0.303   0.312   0.438   0.393
                                  5/7/96    0.267  0.250   0.197   0.15010.162     0.237   0.059   0.209   0.090   0.143   0.070   0.148   0.172   0.159
                                  6/4/96    0.261  0.319   0.172   0.286   0.203   0.162   0.284   0.224   0.338   0.042   0.042   0.0481  0.155   0.243
                                                                                                                                          1
            Mean DON dry                    0.307  0.275   0.223   0.271   0.200   0.228   0.2641  0.193   0.159   0.171   0.170   0.231   0.255   0.226
                                                                                                                                 @
                                                                                                                                      2  0
                                                                                                                                      8  0
                                                                                                                                    4@8 0














            % Oxygen      Saturation

            DATE                            9 EXT  GB 80 5 LMP GB 15 8 OYS         5 OYS GB 50 5 BLM GB2          I I CCh 7 CCH GB 21 5 SFR GB 22
                                 7/26/94@ 43%        92% 48% 75% 49%                 52% 970y,                            1 1=0'-/.69%1 98%1 78%
                                 8/30/941 43%1 84%1 46%1 90%1 42%                    58%1 97%1 54-/ol_101%1 50%1 58%1 88%1 73%1 9194]






        Table 7. Cumulative Database for selected parameters for dry weather samples 1993-1996


                         10/24/94  54%   101%  70%   95%   58%   58%   123%   68%  117%    55%   73%   92%   66%    89%
                          11/8/94  52%   73%   68%   83%   64%   60%    97%   64%   97%    59%   65%   80%   67%   102%
                          3/21/95  87%         85%         91%   95%    93%   91%   78%    87%   91%   70%   94%    84%
                          4/18/95  75%   81%   80%   95%   80%   78%   117%   79%  118%    74%   77%   86%   77%    90%
                          5/2/95   78%1  85%   82%  111%1  80%   78%   106%1  82%  109%    74%   79%   83%   80%    92%
                          6/6/95   49%   52%   63%   67%   60%   29%   112%   70%  113%    44%   63%   64%   64%    62%
                         10/17/95  46%   84%   80%   98%   69%   63%    56%   64%   97%    59%   82%   50%   79%    51%
                          4/9/96   77%   93%   84%   100%  86%   87%    98%   88%  105%1   79%   86%   99%    -85%  101%
                          5/7/96   84%   86%   88%   98%   93%   90%    94%   90%   91%1   91%   94%   95%   96%    93%
                          6/4/96   66%1  80%   76%   80%   82%   66%    82%   78%   77%    75%   71%   84%   84%    80%

        Mean 02 Sat Dry            63%1  83%1  72%1  90%1  71%_  68%1   98%1  74%  100%    709/6 77%1  80%1  80%1 84%





           Table 8. Cumulative database for selected parameters for storm samples 1993-1996


        NI-14 Concentration mg/L
        DATE                            -           -dB- -80 -&--LMP -d-B 1-5 8 -OYS  5 OYS   GB 50 5 -BLM -GB2                7CCH GB21 5SFR GB22
                                    9/9/93    0.044 --6-.-181 --0.043 -0.246           0.037   0.169 0.023 0.118                 0.102 0.009 0.336        0.030
                                   9/27/93    0.045 0.177 0.036 0.051                  0.053.  0.093    0.075 0.057              0.083   0.058 0.181      0.061
                                   11/2/94    0.090 [email protected] --0.090                  0.090   0.100    0.090 0.090              0.110   0.100 0.130      0.110
                                                               0.090                                                                -          -
                                  11/18/93    [email protected] 0.058               0.008   0.173    0.013 0.026              0.233   0.472   0.420    0.385
                                                                                                                                 0.281   0.334   0.167    0.141
                                   12/6/93    0.017      109 0.029     0.045           1.051   0.117    0.035   0.001
                                   5/17/94    0.090'- 6.0-00   0.090   0.090           0.090   0.090    0.090   0.090            0.200   0.100   0.200    0.090
                                   5126/94    0.073 0.158      0.070 -0.063            0.152   0.086    0.069   0.073            0.203   0.124   0.527    0.113
                                   6/13/94    0.033    0.160 -0.090 0.168              0.073   0.071    0.049   0.065-           0.108   0.132   0.434    0.286
                                   6/14/94    0.090    0.100   0.090 0.090             0.090   0.090    0.090   0.090 -          0.100   0.090 0.300      0.200
                                   8/22/94    0.073    0.16-1  0.236   0.088   0.124   0.078   0.077    0.086   0.054 0.066      0.030   0.067 0.067      0.086
                                   9/26/94    0.035    0.0801  0.035   0.077   0.029   0.054   0,057    0.014   0.005 0.193      0.271   0.167   0.057    0.133
                                   11/1/94    0.054 0.0811     0.038   0.017   0.015   0.065   0,060    0.043   0 027    0.167   0.219   0.117   0.162    0.113
                                   11/2/94    0.032 0.0601     0.029   0.028   0.020   0.025   0.098    0.050   0.068    0.172   0.125   0.107   0.239    0.111
                                   4/13/95    0.020    0.1531  0.043   0.048   0.032   0.069   0.064    0.052   0.006    0.312   0.290   0.109, 0.432     0.101
                                   4/14/95    0.009 0.059      0.053   0.083   0.021   0.036   0.048    0.049   0.029    0.276   0.298   0.147   0.484    0.134
                                   5/12/95    0.113 -0.086     0.032   0.040   0.039   0.073   0.057 0.027      0.097    0.278   0.151   0.101   0.263    0.123
                                   5/16/95    0.033    0.127   0.028   0.094   0.049   0.071   0.253    0.027   0.059    0.-251  0.197   0.116 0.264      0.150
                                   5/17/95    0.041 '  0.111   0.024.  0.113   0.024   0.081   0.3571   0.039   0.068    0.301   0.395   0.174   0.223    0.130
                                   9/18/95    0.072    0.113   0.118   0.075   0.015   0.084   0.0971   0.082   0.021    0.782   0.091   0.000   0.007    0.013
                                   9/19/95    0.336    0.099   0.392   0.023   0.025   0.058   0.046    0.088   0.008    0.166   0.217   0.021   0.010    0.0041
                                   11/2/95    0.124    0.146   0.049   0.445   0.018   0.082   0.118 -0.031     0.044    0.543   0.405   0.235   0.091    OA 19
                                   11/3/95    0.042    0.065   0.191   0.068   0.012   0.034   0.030 0.042      0.334    0.152   0.675   0.268   0.747 -0.103
                                   5/17/95    0.089    0.097   0.051   0.042   0.041   0.041   0.146 0.045      0.063    0.319   0 140   0.114   0.112    0.089
                                   6/23/96    0.093    0.127   0.086   0.048   0.146   0.092   0.0521   0.110   0.046    0.306           0.068   0.274    0.073
                                                                              U024
                                                                                 .01 5
                                                                                   2




         Mean NH4 Storms                      0.069    0.108   0.081   0.091 0.041 0.108 0.106 0.055            0.064    0.286   0.209   0.135 0.255 -0.121






          Table 8. Cumulative database for selected parameters for storm samples 1993-1996


        N03 Concentration mg/L                                                 I                      I

        DATE                             9 E)Cr GB 80    5 LMP   GB 15 - 8 OYS 5 OYS   GB 50 5 BLM    GB2    11 CCH 7 CCH GB 21      5SFR GB 22

                                  9/9/93  0.101    0.115  0.025   0.058         0.056  0.0231  0.005   0.021          0.463   0.012  1.096    0.031
                                9/27/93   0.087    0.056  0.014   0.090         0.058  0.0341  0.009   0.030          1.044   0.100  1.304    0.075
                                11/2/94   0.060    0.360  0.070   0.100         0.330  0.0701  0.120   0.080          0.360   0.260  0.310    0.260
                               11/18/93   0.147    0.399  0.068   0.145         0.362  0.1011  0.139   0.071          0.392   0.313  0.309    0.174
                                12/6/93   0.070    0.167  0.102   0.228         0.100  0.117   0.210   0.144          0.235   0.220  0.3241   0.303
                                5/17/94   0.050    0.000  0.060   0.060         0.130  0.130   0.080   0.070          0.160   0.130  0.1501   0.120
                                5/26/94   0.100    0.114  0.049   0.078         0.236  0.055   0.077   0.058          0.334   0.137  0.218    0.080
                                6/13/94   0.065    0.087  0.065   0.060         0.1811 0.049   0.062   0.056          0.637   0.606  0.504    0.191
                                6/14/94   0.080    0.140  0.100   0.140         0.130  0.100   0.060   0.100          0.560   0.370  0.460    0.310
                                  8/22/94 0.061    0.090  0.007   0.037  0.216  0.198  0.049   0.059   0.050   1.246  1.351   0.198  0.906    0.152
                                9/26/94   0.056    0.081  0.073   0.052  0.050  0.437  0.061   0.017   0.001   0.217  0.173   0.211  0.164    0.139
                                11/1/94   0.125    0.253  0.055   0.041  0.206  0.205  0.072   0.039   0.118   0.272  0.305   0.296  0.173    0.147
                                11/2/94   0.114    0.160  0.037   0.055  0.150  0.233  0.034   0.028   0.051   0.314  0.360   0.364  0.236    0.100
                                4/13/95   0.113    0.166  0.124   0.071  0.140  0.249  0.098   0.151   0.041   0.158  0.175   0.157  0.062    0.092
                                4/14/95   0.075    0.081  0.132   0.029  0.106  0.204  0.0821  0.107   0.018   0.176  0.182   0.072  0.119    0.083
                                5/12/95   0.074    0.1071 0.075   0.117  0.1411 0.206  0.0151  0.059   0.028,  0.349  0.348   0.1261 0.289    0.093
                                5/16/95   0.083    0.057  0.067   0.149  0.133  0.194  0.123   0.069   0.087   0.327  0.421   0.327  0.261    0.215
                                5/17/95   0.096    0.155  0.109   0.052  0.122  0.167  0.033   0.086   0.073   0.343  0.413   0.234  0.255    0.186
                                9/18/95   0.122    0.039  0.024   0.258  0.050  0.050  0.084   0.031   0.076   1.084  0.347   0.101  0.656    0.282
                                9/19/95   0.074    0.293  0*021   0.146  0.051  0.051  0.108   0.033   0.457   1.0541 0.347   0.301  0.662    0.242
                                11/2/95   0.224    0.3871 0.242   0.271  0.3211 0.321  0.287   0.300   0.114   0.2951 0.338   0.1331 0.275    0.108
                                11/3/95   0.211    0.134 0.224    0.123  0.547  0.547  0.132   0.323   0.168   0.253  0.446   0.157  0.267    0.288
                                5/17/96   0.085    0.128  0.086   0.093  0.186  0.186  0.062   0.112   0.045   0.151  0.154   0.162  0.126    0.155
                                6/23/96   0.113    0.028  0.143   0.047  0.207  0.207  0.018   0.092   0.032   0.741  0.685   0.312  0.361    0.215


        Mean N03 Storms                   0.099    0.150  0.082   0.104  0.175  0.210  0.0811  0.095   0.083   0.4651 0.426   0.221  0.395    0.168





           Table 8. Cumulative database for selected parameters for storm samples 1993-1996


        P04 Concentration mg/L

        DATE                               9 EXT   GB 80    5 LMP   GB 15  8 OYS   5 OYS   GB 50   5 BLM   G132            7 CCH   GB 21   5SFR GB 22

                                    9/9/93  0.008    0.065   0.005   0.094          0.009   0.083   0.011  0.045            0.012  0.096   0.031    0.046
                                 9/27/93    0.010    0.050   0.007   0.029          0.006   0.055   0.012  0.035            0.042  0.025   0.024    0.029
                                 11/2/94    0.007    0.034   0.009   0.020          0.003   0.032   0.002  0.023            0.033  0.022   0.019    0 093
                                 11/18/93   0.011    0.049   0.006   0.030          0.015   0.047   0.020  0.023            0.058  0.031   0.046    0.034
                                 12/6/93    0.019    0.032   0.021   0.023          0.019   0.033   0.025  0.017           10.039  0.045   0.014    0.018
                                 5/17/94    0.004    0.0001  0.001   0.0071         0.001   0.0221  0.001  0.011-           0.018  0.014,  0.007    0.013
                                 5/26/94    0.014    0.042   0.012   0.0201         0.014   0.027   0.012  0.018            0.033  0.020   0.019    0.020
                                 6/13/94    0.013    0.031   0.012   0.037          0.009   0.035   0.010  0.021            0.048  0.033   0.038    0.031
                                 6/14/94    0.004    0.030   0.009   0.027          0.006   0.032   0.010  0.023            0.039  0.020   0.024    0.026
                                 8/22/94    0.012    0.079   0.002   0.035  0.009   0.011   0.057   0.011  0.046   0.0308   0.014  0.035   0.006    0.039
                                 9/26/94    0.017    0.040   0.008   0.019  0.008   0.012   0.051   0.006  0.024   0.0334   0.036  0.035   0.011    0.021
                                 11/1/94    0.026    0.077   0.010   0.012  0.009   0.010   0.056   0.014  0.021   0.0414   0.034  0.033   0.015    0.027
                                 11/2/94    0.010    0.065   0.006   0.012  0.010   0.011   0.073   0.009  0.030   0.0358   0.034  0.031   0.017    0.027
                                 4/13/95    0.002    0.015   0.002   0.012  0.002   0.003   0.022   0.002  0.009   0.0190   0.017  0.012   0.005    0.012
                                 4/14/95    0.002    0.0151  0.002   0.012  0.002   0.003   0.0221  0.002  0.009   0.0190   0.017  0.012   0.005    0.012
                                 5/12/95    0.006    0.019   0.007   0.009  0.007   0.007   0.013   0.005  0.007   0.0584   0.049  0.012   0.009    0.012
                                 5/16/95    0.008    0.033   0.006   0.016  0.005   0.008   0.026   0.007, 0.014   0.0464   0.045, 0.026   0.006,   0.016
                                 5/17/95    0.005    0.032   0.003   0.009  0.005   0.007   0.018   0.004  0.008   0.0508   0.033  0.027   0.0021   0.011
                                 9/18/95    0.039    0.075   0.007   0.073  0.0071  0.009   0.072   0.011  0.045    0.027   0.022  0.053   0.0051   0.189
                                 9/19/95    0.009    0.082   0.008   0.078  0.009   0.010   0.053   0.012  0.041    0.025   0.023  0.057   0.0091   0.064
                                 11/2/95    0.012    0.084   0.011   0.040  0.014   0.019   0.079   0.010  0.032    0.038   0.038  0.035   0.0261   0.028
                                 11/3/95    0.012    0.061   0.015   0.027  0.024   0.014   0.034   0.015  0.027    0.035   0.040  0.034   0.016    0.027
                                 5/17/95    0.009    0.028   0.006   0.029  0.007   0.010   0.017   0.008  0.036    0.015   0.014  0.020   0.010    0.014
                                 6/23/96    0.004    0.010   0.004   0.008  0.002   0.003   0.009   0.004  0.009    0.025   0.017  0.006   0.007    0.005


        Mean P04 Storms                     0.011    0.044   0.008   0.028  0.008   0.009   0.040   0.009  0.024    0.033   0.031  0.031   0.016    0.031






          Table 8. Cumulative database for selected parameters for storm samples 1993-1996


       TSS Concentration mg/L

       DATE                              9 EXT  GB 80 5 LMP     GB 15  8 OYS 5 OYS GB 50     5 BLM   GB 2           7 CCH  GB21 5SFR GB22


                                 9/9/93    0.80     7.80   0.20   3.20           1.20   2.20    3.40   3.80           7.20  12-80    0.60    1.60
                               9/27/93     3.40   30.60    1.20  18.60           2.40   3.40.   2.60   1.60           5.00    1.60   3.00    2.40
                               11/18/93    3.00   31.00    1.00  10.00           9.00   5.40    7.80   6.00           4.60    5.80   0.80-4.00
                               12/6/93     5.00   28.20.   7.80  24.60           9.20   5.00    4.00   3.40           7.60    8.40   1.20    4.80
                               5/26/94     1.00   106-67   0.80  18.40           3.40   6.601   2.00   6.80           2.20    6.801  2.00    7.80
                               6/13/94     2.00   40.00    3.40   9.60           8.80   5.80    -2.20  5.40           3.00    7.00   4.40    7.60
                               6/14/94     2.00   35.00    3.00   7.00           9.00   4.50    2.00   5.50           2.00    5.50   3.00    3.50
                               8/22/94     1.80   29.00    1.80   6.80   10.00   3.40   5.40    4.20   4.20    4.40   6.20    7.20   13.00   5.80
                               9/26/94     2.00   19.00    1.20   3.80   8.00    5.00   8.20    3.00   4.20    4.40   5.40    7.00   2.60    5.00
                               11/1/94     3.00   14.20    1.60   5.60   2.40    2.40   2.80    6.40   19.60   2.40   2.80    4.40   1.60   10.60
                               11/2/94     0.60   17.401   0.80  12.60   3.20    5.60  31.40    5.80  35.20    2.40   4.00  11.00    1.00   107.67
                               4/13/95     2.00   34.80    1.40  14.50   11.80   7.80  21.80    2.20   3.70    2.80   3.00    8.50   1.40   10.40
                               4/14/95     1.60   27.60    1.80  14.00   6.60    5.40   4.80    2.40   5.60    7.80   4.60    5.60   2.20    6.80
                               5/12/95     2.20   40.00    1.60  21.40   5.20    6.40   6.40    3.20   8.00    4.40   2.80    5.60   3.40   10.80
                               5/16/95     2.00   67.00    -1.80 78.00   9.401   6.20  11.80    3.20   9.60    3.60   2.60  10.60    2.40,  12.00
                               5/17/95     1.80   91.00    1.00  96.00   6.80    5.80   8.801   3.00   10.20   4.40   2.60  10.20    2.001  17.80
                               9/18/95     5.60   15.00    2.40  11.60   8.40    9.00   5.60    4.20   6.40    13.00  3.60  19.00    9.60   44.67
                               9/19/95     3.20     8.20   1.20  21.00   5.80    6.40   5.60    2.40   3.80    4.00   2.60  23.00    10.00  24.00
                               11/2/95     3.20   31.00    2.60  32.80   6.801   3.80   5.80    3.40   5.60    3.40   2.80  11.20    2.00    4.20
                               11/3/95     4.20   31-00    3.80  17.80   6.60   19.67  10.00    5.60   7.60    9.00   40.67 29.67    2.80    9.80
                               5/17/96     1.60   42.67    1.20  17.60   8.60    5.80   9.40    5.20   8.80    3.60   2.80    7.40   2.80    6.80
                               5/18/96     15.80  60.67    2.20  19.20   9.00    4.60  19.20    2.80   6.80    3.60   4.20    9.00   2.40    7.20
                               6/23/96     1.80   23.80    1.40  16.40   12.20   4.00   5.80    3.20   6.80    4.60   2.80  11.00    2.60    9.60
                               6/24/96     2.60   16.001   2.20  27.40   9.60    5.20 8.40      2.80   9.60    4.20   5.20    6.80   2.20    5.00
                                                        1
        Mean                               3.01   35.32    1.98  21.16   7.67    6.23   8.50    3.63   7.84    4.82   5.43    9.79   3.29   13.74


                                                                                                     L                     I       I






           Table 8. Cumulative database for selected parameters for storm samples 1993-1996


        DON Concentration mg/L

        DATE                                9 E)Cr GB 80    5 LMP    GB 15   8 OYS  5 OYS    GB 50  5 BLM    G132   11 CCh  7CCH GB21       5SFR    GB 22

                                  8/22/94   0.440     0.570  0.070    0.350  0.270   0.300   0.160   0.430   0.170   0.440   0.410   0.310   1.050    0.410
                                  9/26/94   0.405     0.369  0.430    0.332  0.317   0.764   0.226   0.261   0.165   0.000   0.000   0.168   0.367    0.345
                                  11/1/94   0.311     0.516  0.237    0.142  0.159   0.210   0.108   0.238   0.075   0.210   0.000   0.106   0.255    0.000
                                  11/2/94   0.424     0.470  0.253    0.216  0.080   0.363   0.348   0.362   0.221   0.000   0.206   0.000   0.326    0.449
                                  4/13/95   0.078     0.000  0.083    0.072  0.1081  0.002   0.048   0.008   0.283   0.000   0.000   0.104   0.000    0.178
                                  4/14/95   0.166     0.110  0.000    0.097  0.063   0.110   0.120   0.063   0.143   0.000   0.000   0.151   0.000    0.163
                                  5/12/95   0.153     0.227  0.202    0.134  0.240   0.151   0.188   0.185   0.155   0.000   0.  181 0.233   0.1281   0.194
                                  5/16/95   0.184     0.385  0.155    0.087  0.148   0.165   0.000   0.144   0.123   0.072   0.002   0.207   0.036    0.185
                                  5/17/95   0.303     0.2141 0.107    0.135  0.174   0.182   0.000   0.136   0.129   0.086   0.000   0.000   0.172    0.054
                                  9/18/95   0.346     0.1881 0.268    0.036  0.239   0.276   0.070   0.317   0.273   0.000   0.302   0.369   0.667    1.864
                                  9/19/95   0.000     0.0991 0.000    0.121  0.227   0.281   0.016   0.310   0.000   0.390   0.236   0.148   0.648    0.233
                                  11/2/95   0.073     0.2071 0.049    0.000  0.229   0.327   0.086   0.079   0.161   0.000   0.077   0.152   0.064    0.233
                                  11/3/95   0.318     0.4911 0.095    0.319. 0.304   0.339   0.529   0.325   0.088   0.355   0.000   0.365   0.000    0.218
                                  5/17/96   0.217     0.245  0.142    0.1951 0.228   0.273   0.162   0.143   0.191   0.039   0.156   0.185   0.182    0.186
                                  6/23/96   0.274     0.254  0.261    0.3161 0.086   0.342   0.290   0.288   0.231   0.123   0.017   0.310   0.125    0.302

        Mean                                0.246     0.290  0.157    0.170  0.191   0.272   0.157   0.219   0.161   0.114   0.106   0.187   0.268    0.334

        % Oxygen Saturation

        DATE                                9 EXT  GB 80 5 LMP        G1315  8 OYS  5 OYS    GB 50  5 BLM    GB2    11 CCh   7CCH   GB21    5SFR    GB 22

                                  8/22/94     48%      50%     46%     62%     59%     62%    84%     50%      80%     54%     64%     53%     84%     55%
                                  9/26/94              74%             77%                    95%              95%                     77%             75%
                                  11/1/94     47%      75%     67%     72%@    65%     62%    94%     54%      93%     65%     75%     70%     69%     66%
                                  11/2/94     49%      90%     72%     79%     67%     68%@   99%     59%    100%      71%     76%     66%     71%     74%
                                  4/13/95     79%     104%     86%    105%     85%     86%   135%     82%    132%      80%     76%   104%      81%-105%
                                  4/14/95     81%     101%     88%     99%     83%     85%   113%     81%    123%      85%     84%     89%     84%     89%
                                  5/12/951    56%1     74%1    69%1    86%1    79%1    72%   115%     69%1   114%1     64%1    72%1    80%1    67%1 84%1






         Table 8. Cumulative database   for selected parameters for  storm samples 1993-1996


                             5/16/95    56%    77%    59%    82%    71%1  70%   103%    65%    97%     60%    69%   76%    62%     77%
                             5/17/95    65%    78%    65%    83%    71%1  67%    98%    62%    100%    58%    67%   75%    73%     75%
                             9/18/95    63%    78%    46%   104%    75%   49%   100%    41%    100%    54%    63%   108%   96%     115%
                             9/19/95    55%    76%    53%   117%    72%   47%   109%    59%    105%    45%    62%   128%   116%    140%
                             11/2/95    73%    81%    88%    88%    70%   70%    84%    81%    85%     84%    84%   86%    84%     82%
                             11/3/95    87%    83%    94%    93%    76%   82%    89%    85%    90%     86%    96%   104%   93%     102%
                             5/17/96    76%    98%    90%   108%    84%   84%    87%    84%    91%     86%    86%   99%    89%1    99%
                             5/18/96    93%    90%    94%   102%    92%   81%    87%    88%    90%     88%    88%   96XO   96%     96%
                             6/23/96    83%    86%1   60%    88%    83%   66%   100%    62%    97%     46%    77%   86%    76%     86%
                             6/24/96    76%    91%    77%    98%    71%   81%    97%    72%    99%     54%    70%   91%    82%     92%


      iMean                             68%    83%    72%1 91%1     75%1  71%] 99%1     68%    99%1    68%1   75%1  88%1   83%1    89%





          Table 9. Comparison of Dry vs Storm data for the cumulative 93-96 database using Welch's
          test for unequal sd
          DATA                     PARAMETER STATION           SIGNIFICANCE INTERPRETATION

          CUMULATIVE 1993-1996     NI-14         5 SFR         NS
          DRYVSSTORM


                                   N03           11CCH         NS
                                                 5 OYS         NS
                                                 9 EXT         P=.0086       STORM > DRY


                                   DON           GB 50         NS
                                                 GB 22         NS


                                   P04           9 EXT         NS
                                                 GB 50         NS
                                                 JGB 22        INS






              Table 10. Bacterial indicator concentrations at all sites during dry weather conditions.


              FECAL COLIFORMS
              DATE              19 EXT    GB 80   5 LMP    GB 15    8 OYS    5 OYS    GB 50    5 BLM     GB2   11 CCh    7 CCH    GB 21    5 SFR    GB 22
                       10/17/95          140 156        22       230      70       305     20        135 71.5        340       165    480        760    425
                         4/9/96          20    54          7     87.5      2        8      0.5       6.5      1      12        65     140        36      35
                         5f7/96          51  118       27.5      94       47       61.5   17.5     20.5    17        790       112    320        153    204
                         6/4/96          66  110        29       104      455      66      30        98    40        190       196    365        630     35
              Geo. Ave.         T        55  102        19       118      42       56         9      36    15        157       124    298        227    102
              FW:SW                      0.9            0.1               3.5      15.3              1.9             0.7       0.3               1.8


              E. eoft
              DATE              19 EXT    GB 80   5 LMP    GB 15    8 OYS    5 OYS    GB 50    5 BLM     GB2   11 CCh    7 CCH    GB 21    5 SFR    GB 22
                       10/17/95          90    %        12       145      65       115     11        55  58.5        90        130    360        400    370
                         4/9/96          17.5  38          5     17.5      2        8      0.5         6      1      9.5       30     100        14.5    25
                         5n196           46.5  78      23.5      76       44.5     51     14.5       18    15        460       74     170        88     118
                         6/4/96          56    90       24       94       430      66      23        94    35        80        114    295        460     15
              Geo. Ave.         T        45    71       14       65       40       42         7      27    13        75        76     206        124     64
              FW:SW                      0.9            0.1               5.9      10.5              0.9             0.3       0.4               1.1


              Enterococci
              DATE              19 EXT    GB 80   5 LMP     GB 15   8 OYS    5 OYS    GB 50    5 BLM     GB2   11 CCh    7 CCH    GB 21    5 SFR    GB 22
                       10/17/95          95    10       20       37       155      110     0.5       118 16.5        95        58      23        90      38
                         4/9/96          5       8         4       4      0.5      17.5    2.5         4 27.5          4       17      27        12        2
                         5n196           4.5   18       1.5      6.5       9        4      3.5       0.5   1.5       17.5      36     24.5       4.5       9
                         6/4/96          7   13.5       1.5      26.5     24       11.5    8.5       18  48.5          2       65      54        22        9
              Geo. Ave.                  11    12          4     13       11       17         2        '8  13        11        39      30        18        9
              FW:SW                      0.9            0.3               4.6      7.0               0.6             0.4       0                 2.0





               Table 11. Bacterial indicator concentrations at all sites on the 1st and 2nd days of storm
               events.


               FECAL COLIFORMS
               DATE              9 EXT   GB 80   5 LUP    GB 15   8 OYS   5 OYS    GB 50   5 BLM   GB2    11 CCh   7 CCH    GB 21   5 SFR   GB 22
                         9/18/95         3900    34       252     100     770  5300        28   410       4        42       1000 1300       130  820
                         9/19/95         520     28       145     25      600      900     8    290       2        26       360  160        140  60
                         11/2,95         400 1740         55      1260    340      60      70   60        124      52       190  840        65   124
                         11/3/95         380 2160         285     1280    460      940     410  390       565      950      1150 2000       885  1350
                         5/17/96         72      100      35      84      208      162     57   160       53       240      44   320        595  210
                         5/18/96         522     40       48      96      56       56      24   20        31       135      106  330        40   85
                         6/23/96         68      32       16      350     250      102     26   9350      20       120      1500 1400  3200      320
                         6/24/96         78      24       36      186     290      88      5    330       8        315      140  640        710  345
               Geo. Ave.                 298     101      70      195     297      262     32   269       25       127      306  653        295  252
               1st day                   2%      117      53      247     342      269     41   438       27       89       335  836        356  298
               2nd day                   2"      87       92      155     2S9      254     25   16S       23       180      280  510        244  221
               lst:2nd day               1.0     1.3      0.6     1.6     1.3      1.1     1.6  2.6       1.2      O.S      1.2  1.6        IS   1.3
               FW:SW                     2.9              OA              9.2      8.1          10.8               0.2      0.5             1.2


               ExoU
               DATE              9 EXT   GB 80   5 LW     GB 15   8 OYS   5 OYS    GB 50   5 BLM   GB2    11 CCh   7 CCH    GB 21   5 SFR   GB 22
                         9/18/95         3800    32       190     85      770      700     10   300       2        42       850 1000        130  580
                         9/19/95         380     22       125     20      480      220     8    200       2        24       320  125        110  50
                         11/2/95         380 1420         55      1160    300      60      68   50        215      43       140  560        40   102
                         11/3/95         380 1440         285     400     420      880     358  390       520      690      910 1200        785  1300
                         5/17/96         55      100      26      52      204      104     39   92        34       150      16   150        425  195
                         5/18/96         476     40       44      96      56       56      24   20        28       95       70   215        40   75
                         6/23/96         62      30       15      350     220      94      26   9350      17       115      1400 1200  3200      320
                         6/24/96         78      24       34      152     290      78      4    266       8        235      140  550        480  310
               Geo. Ave.                 268     90       62      146     276      156     26   219       22       102      229  453        242  220
               1st day                   265     108      4S      206     319      142     29   337       22       7S       227  563        290  246
               2nd day                   271     74       95      104     239      171     23   143       22       139      231  365        202  197
               lst:2nd day               1.0     LS       0.5     2.0     1.3      0.8     1.3  2A        1.0      0.5      1.0  1.5        IA   1.3
               FW:SW                     3.0              OA              10.8     6.1          9.9                0.2      0.5             1.1


               ENTEROCOCCI
               DATE              9 EXT   GB 80   5 LUP    GB 15   8 OYS   5 OYS    GB 50   5 BLM   GB2    11 CCh   7 CCH    GB 21   5 SFR   GB 22.
                         9/18/95         2160    10       331     14      360      625     4    400       2        21       392     6       145  22
                         9/19/95         234     0        97      2       323      144     1    110       2        24       165     3       13      5
                         11/2/95         240     580      105     1035    950      150     42   128       375      46       135  485        58   36
                         11/3/95         380     590      380     420     350      1020    960  345       260      1080     2580 595        148  222
                         5/17/96         55      37       2       15      52       50      32   61        34       23       30   111        32   18
                         5/18/96         62      33       7       10      116      126     15   24        20       30       31   54         20   20
                         6/23/96         31      24       13      23      76       59      3    34        1        35       81   147        87   32
                         6/24/96         27      8        33      5       22       15      2    139       1        58       53   49         112  25
               Geo. Ave.                 137     27       41      26      157      129     12   104       11       49       131  62         56   27
               1st day                   172     47       31      47      191      129     11   101       12       30       106  83         69   26
               2nd day                   110     16       54      14      130      129     12   106       9        82       162  47         46   27
               Ist:2nd day               1.6     3.0      0.6     3.3     1.5      1.0     0.9  1.0       1.3      OA       0.7  1.8        1.5  1.0
               FW:SW                     5.0              1.6             13.5     11.0         9.7                0.8      2.1             2.1







               Table 12. Summary of statistical analyses of bacterial indicator data using paired t tests.

                      Comparison                       Results of statistical analysis and explanation
                                               Fecal coliforms               E. coli               Enterococci
                                                                        1994-1995 DATA
               Dry vs Storms
               9 EXT                        storm > dry (P < 0.01) storm > dry (P < 0.01) storm > dry (P < 0.01)
               GB 80                                  NS                       NS                       NS
               5 LMP                        storm > dry (P < 0.05) storm > dry (P < 0.01) storm > dry (P < 0.01)
               GB 15                                  NS                       NS                       NS
               8 OYS                                  NS                       NS                       NS
               5 OYS                                  NS             storm > dry (P < 0.05) storm > dry (P < 0.05)
               GB 50                                  NS             storm > dry (P < 0.05)             NS
               5 BLM                                  NS             storm > dry (P < 0.05)   storm > dry (P < 0.05)
               GB2                                    NS                       NS                       NS
               11 CCH                                 NS                       NS                       NS
               7 CCH                        storm > dry (P < 0.05)   storm > dry (P < 0.01)   storm > dry (P < 0.05)
               GB 21                        storm > dry (P < 0.05)             NS                       NS
               5 SFR                                  NS                       NS                       NS
               GB 22                                  NS                       NS                       NS
               1st vs 2nd day storm samples
               GB15                                   NS                       NS                ld > 2d (P<0.05)
               All other sites                        NS                       NS                       NS


               Between site differences for all sites and conditions: see Table 15.


               Between site differences: Freshwater (FW)       compared to paired saltwater (SW) sites
               9 EXT vs GB 80 wet&dry                 NS                       NS                       NS
               5LUP vs GB 15 wet                      NS                       NS                       NS
               5LNW vs GB 15 dry              FW<SW (P < 0.05)          FW<SW (P < 0.05)                NS
               8 OYS vs GB 50 wet             FW>SW (P<0.01)            FW>SW (P<0.01)           FW>SW (P<0.05)
               8 OYS vs GB 50 dry             FW>SW (P<0.05)            FW>SW (P<0.05)                  NS
               5 OYS vs GB 50 wet             FW<SW (P < 0.05)          FW<SW (P < 0.05)        FW<SW (P < 0.01)
               5 OYS vs GB 50 dry             FW>SW (P<0.05)            FW>SW (P<0.05)                  NS
               5 BLM vs GB 2 wet              FW>SW (P<0.05)                   NS                FW>SW (P<0.05)
               1 1CCH vs GB 21 wet            FW<SW (P<0.01)            FW<SW (P<0.01)                  NS
               7 CCH vs GB 21 dry             FW<SW (P<0.01)            FW<SW (P<0.01)                  NS
               All other site/conditions              NS                       NS                       NS








              Table 13. Statistically significant differences between bacteria at all sites.
              Bottom left matrix = wet conditions;                 Top right matrix = dry conditions.
                                  I                           . I        F      I
              Fecal coliforms                              (ANOVA: *P<0.05; **P<0.01)
                            9 EXT  GB 80 5 LMP GB 15       8-OYS 5 OYS JGB 50    5 BLM GB2       11 CCH 7 CCH    GB 21 5 SFR    GB 22
              9 EXT         wetNdry
              GB 80                wet\,dry
              5 LMP                       @Wetmq
              GB 15                                wet\,dry
              8 OYS                                        wefdry
              5 OYS                                               weklry
              GB 50                                                      wetdry
              5 BLM                                                              wet\dry
              GB2                                                                       1we6dry
              11 CCH                                                                             we&dry
              7 CCH                                                                                      wet-dry
              GB 21                                                                                              wet\dry
              5 SFR                                                                                                      weiNdry
              GB 22                                                                                                             weMq
              E. coli
                            9 EXT  GB 80   5 LMP   GB 15 8 OYS 5 OYS     GB 50 5 BLM     GB2     11 CCH  7CCH GB21       5 SFR GB 22
              9EXT          wet\dry
              GB 90                wet\dry
              5LMP                         wetdry
              GB15                                 weMq
              80YS                                         wet\dry
              SOYS                                                WeNg
              GB 50                                                       wet\dry
              5BLM                                                               wet\dry
              GB2                                                                        wct\dry
              IICCH                                                                              weUry
              7CCH                                                                                       1weUry
              GB 21                                                                                              wet\dry
              5 SFR                                                                                                      -etdry
              GB 22                                                                                                             wet\dry
              Enterococci
                            9 EXT GB 90    5 LMP GB 15 8 OYS 5 OYS        GB 50 5 BLM    GB2     IICCH   7CCH    GH 21   5 SFR GB 22
              9EXT          wet\dry
              GB 80                 wet\dry
              5LMP                         WeA&Y
              GB15                                 wet*y
              80ys                                         wetNdby
              50ys                                                weedry
              GB 50                                                       we&&y
              5BLM                                                               wet\dry
              GB2                                                                        wet\dry
              IICCH                                                                              wet\dry
              7CCH                                                                                       wet\dry
              GB21                                                                                               wet\,dry
              5SFR                                                                                                       wet\dry
              GB 22                                                                                                             weNdry








               Table 14. Summary of statistical analyses of bacterial indicator data using 1-way ANOVA.
                                                       INTERANNUAL COMPARISONS
                                     Fecal coliforms                   E. coli                    Enterococci
                                                                 1994-95 vs 1995-96
               Wet conditions              NS                            NS                            NS
               Dry conditions
               GB80                94-5<95-6 (P<0.01)            94-5<95-6 (P<0.01)                    NS
               5SFR                94-5<95-6 (P<0.05)                    NS                            NS
               5LW                         NS                            NS                    94-5>95-6 (P<0.05)
               GB,50                       NS                            NS                    94-5>95-6 (P<0.01)
                                                                 1993-94 vs 1995-96
               Wet conditions
               5SFR                93-4<95-6 (P<0.05)                    NS                            NS
               GB2                         NS                            NS                    93-4>95-6 (P<0.05)
               Dry conditions
               GB80                934<95-6 (P<0.01)             93-4<95-6 (P<0.01)                    NS
               5SFR                934<95-6 (P<0.05)                     NS                            NS
               5LMP                        NS                            NS                    93-4>95-6 (P<0.01)
               GB15                93-4<95-6 (P<0.01)                    NS                            NS
               GB21                93-4<95-6 (P<0.01)            93-4<95-6 (P<0.05)                    NS
               GB22                        NS                    93-4<95-6 (P<0.05)                    NS
               GB50                        NS                            NS                    934<95-6 (P<0.05)
                                                                 1993-94 vs1994-95

               Wet conditions
               GB2                         NS                            NS                  93-4 > 94-5 (P < 0.05)
               GB 13                       NS                            NS                  93-4 > 94-5 (P < 0.05)
               Dry conditions
               5 BLM              93-4 < 94-5 (P < 0.05)                 NS                            NS
               GB 50                       NS                   93-4 > 94-5 (P < 0.05)                 NS
               5 SFR                       NS                            NS                  93-4 < 94-5 (P < 0.05)
                                             ALL 1993-96 DATA. STORM VS. DRY CONDITIONS
               9 EXT              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.01)
               GB 80              storm > dry (P < 0.05)        storm > dry (P < 0.05)       storm > dry (P < 0.05)
               5 LMP              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.05)
               GB 15              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.01)
               5 OYS              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.01)
               GB 50              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.05)
               5 BLM              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.01)
               GB 2               storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.05)
               7 CCH              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.01)
               GB 21              storm > dry (P < 0.05)        storm > dry (P < 0.05)       storm > dry (P < 0.01)
               5 SFR              storm > dry (P < 0.05)        storm > dry (P < 0.05)       storm > dry (P < 0.01)
               GB 22              storm > dry (P < 0.01)        storm > dry (P < 0.01)       storm > dry (P < 0.01)





                Table 15. Fecal coliform concentrations (per loo ml) at all sites: 1993-96.


                DRY              9-EXT GB80 S-LUP GBI5 5-OYS GB50 5-BLM GB2 7-CCH GB21 5-SFR GB22
                          8/24/93   6       7         4     60         6      1    3         5    220     54      4       11
                          9M93      51      5         5     15         5      4    7         1    133     74      2       8
                          10/5/93   8       6         2     50         13     0.8  6         8    166     91      4       41
                          12/20/93  16      46        6     49         9      4    2         5    22      177     23      47
                          4/19/94   26                4     20         8      0.8  7         2    12      29      29      30
                          5/3/94    77      56        19    14         100    86   53        27   59      125     73      27
                          6/22/94   32.5    5.5       15    6.25       75     70   220       55   72.5    11.25  217.5    100
                          7/26/94   30      17        10    210        40     10   100       9    80      58      20      10
                          8/30/94   12      20        1     37         14     9    210       9    70      40      210     9
                          10/24/94  90      32        20    104        50     10   900       9    108     400     55      60
                          11/8/94   25      14        30    80         70     9    1140      30   330     160     44      34
                          3121/95   30                10               25     9    30        20   14      24      10      16
                          4/18/95   20      12        9     13         21     9    9         9    180     57      10      20
                          5/2/95    26      9         9     30         18     9    10        9    155     140     10      9
                          616/95    70      30        14    99         24     9    48        10   67      117     200     20
                          10/17/95  140     156       22    230        305    20   135       71.5 165     490     760     425
                          4/9/96    20      54        7     87.5       8      0.5  6.5       1    65      140     36      35
                          5/7/96    51      118       27.5  94         61.5   17.5 20.5      17   112     320     153     204
                          6/4/96    66      110       29    104        66     30   98        40   196     365     630     35
                Geo.Ave.            31      23        9     49         26     7    33        10   97      79      39      30
                1993-94             22      12        6     23         is     5    11        7    66      33      17      28
                1994-95             31      17        10    59         29     9    84        12   92      87      35      18
                1995-96             55      102       19    118        S6     9    36        15   124     298     227     102
                WET              9-EXT GB80 5-LNW           GB15  5-OYS   GB50  5-BLM        GB2  7-CCH   GB21   5-SFR    GB22
                          9/9/93    1240    17.5      40    160        660    4.5  103       10.5 3110    1180    10      258
                          9r27/93   820     280       30    3040       1160   2.5  36        19.5 2800    140     14      100
                          11 r2M    105     14        16    220        122    183  168       43   48      5       220     60
                          11/18/93  460     160       50    200        1520   54.5 180       210  3600    645     132     405
                          12/6/93   260               328   360        420    58   90        75   360     540     120     110
                          5117/94   220     31        46    36         183    146  71        55   112     11      98      20
                          5/26/94   115     60        16    165        210    55   85        47   102     295     143     Ill
                          6/13/94   210     22.5      70    355        3200   52.5 130       35   325     5500    40      5700
                          6/14/94   57      22        24    106        158    330  133       70   200     2       200     28
                          8/22/94   66      60        34    305        720    18   8000      22   760     380     183     260
                          9/26/94   440     2000      600   720        750    220  190       270  1650    1920    1350    1880
                          II/l/94   2100    85        17    675        29     9    99        32   280     1375    65      70
                          ll/Z/94   40      55        55    947        2000   182  430       74   340     545     1330    480
                          4/13/95   440     23        10    8          90     1    20        3    19600   180     48      33
                          4/14/95   60      28        15    24         28     9    22        13   4140    79      90      49
                          5/12/95   100     36        9     40         2320   40   73        22   10200   40      18      21
                          5/16/95   80      22        13    75         140    26   81        22   1000    148     52      40
                          5/17/95   70      54        34    50         110    12   61        22   59      126     62      41
                          9/18/95   3900    34        252   100        5300   28   410       4    1000    1300    130     820
                          9/19/95   520     28        145   25         900    8    290       2    360     160     140     60
                          11/2/95   400     1740      55    1260       60     70   60        124  190     840     65      124
                          11/3/95   380     2160      285   1280       940    410  390       565  1150    2000    985     1350
                          5/17/96   72      100       35    84         162    57   160       53   44      320     595     210
                          5/18/96   522     40        48    96         56     24   20        31   106     330     40      85
                          6123/96   68      32        16    350        102    26   9350      20   ISW     1400    3200    320
                          6/24/96   78      24        36    186        88     5    330       8    140     640     710     345
                Geo.Av&             221               43    173        312    31   149       31   SSO     272     133     ISO
                1993-94             250     42        42    229        472    46   101       46   419     130     72      143
                1994-95             149     63        28    117        242    20   130       26   1216    261     120
                1995-96          1  298     101       70    195        262    32   269       25   306     653     295     252





                   Table 16. E. coli concentrations (per 100 ml) at all sites: 1993-96.


                   DRY                 9-EXT GB80 5-LMP GB15 5-OYS GB50 5-BLM GB2 7-CCH GB21                              5-SFR GB22
                              _j/-24/93 12      6         3    115     21         4    4         4    1390    63          6   6
                              qn193    98       6         4    18      20         7    10        2    240     137         1   27
                              10/5/93  10       13        3    131     41         2    3         15   330     108         6   88
                              12t2O/93 19       51        15   61      23         11   6         4    25      140         46  44
                              4/19/94  16                 8    34      10         3    8         4    21      22          21  8
                              5/3194   67       56        18   3.25    59         64   43        15   47      1.25        47  27
                              6/22/94  27.5     5         14   6.25    75         62.5 220       45   37.5    8.75        127.5 100
                              7/26/94  30       17        5    210     40         5    100       7    64      58          20  2
                              8/30/94  12       16        1    37      14         1    210       1    70      40          210 7
                              10/24/94 33       32        11   104     33         3    800       1    108     219         55  34
                              11/8/94  25       14        23   39      66         6    610       19   330     123         44  34
                              3/21/95  16                 4            25         1    10        6    14      24          5   16
                              4/18/95  20       12        2    13      21         1    3         3    171     57          10  6
                              5/2/95   26       6         7    21      18         1    2         1    155     71          4   7
                              6/6/95   52       21        14   99      24         7    48        10   67      117         200 12
                              10/17/95 90       96        12   145     115        11   55        58.5 130     360         400 370
                              4/9/96   17.5     38        5    17.5    8          0.5  6         1    30      100         14.5 25
                              5f7/96   46.5     78        23.5 76      51         14.5 18        15   74      170         88  118
                              6/4/96   56       90        24   94      66         23   94        35   114     295         460 15
                   Geo.Ave.            28       21        7    42      30         5    26        6    90      66          31  22
                   1993-94             25       14        7    27      29         10   13        7    100     32          is  28
                   1994-95             24       is        6    51      27         2    48        4    89      72          28  10
                   1995-96             45       71        14   65      42         7    27        13   76      206         124 64
                   wFr                 9-EXT GB80 5-LUP        GB15 5-OYS GB50 5-BLM             GB2 7-CCH    GB21        5-SFR GB22
                              9/9193   480      12        25   110     310        4.5  53        9    1300    820         4   186
                              9/27/93  640      270       20   2990    880        2.5  18        19.5 2200    120         7   100
                              I I rZ/93 190     30        40   200     140        230  280       50   80      10          280 90
                              11/18/93 440      150       44   200     1300       41   172       198  3200    625         53  320
                              12/6/93  240                323  340     420        53   90        60   240     350         108 90
                              5/17/94  240      32        52   47      360        190  79        64   90      7           130 28
                              5/26/94  112,5    20        15   142     130        54   83        16.5 9       200         98  43
                              6/13/94  195      17.5      60   425     3000       52.5 115       33.8 305     4200        35  500
                              6/14/94  62       14        30   97      133        220  110       105  189     5           280 4
                              8122/94  58       40        25   165     540        15   8000      18   660     300         135 260
                              9/26/94  350      2000      510  560     570        220  190       Z70  1650    1200        1250 1850
                              11/1/94  630      65        13   445     26         8    46        31   170     895         45  60
                              11 t2/94 50       55        54   867     192D       167  330       62   310     420         1310 385
                              4/13/95  220      23        7    6       84         1    20        2    150     110         16  25
                              4/14/95  50       26        15   21      24         7    20        13   120     53          71  36
                              5/12/95  100      32        8    20      440        31   60        18   800     25          16  19
                              5/16/95  50       22        13   65      120        23   62        16   800     114         50  35
                              5/17/95  70       44        34   40      100        11   54        16   49      92          42  5
                              9/18/95  3800     32        190  95      700        10   300       2    850     1000        130 580
                              9/19/95  380      22        125  20      220        8    200       2    320     125         110 50
                              11/2/95  380      1420      55   1160    60         68   50        215  140     560         40  102
                              11/3/95  380      1440      295  400     980        358  390       520  910     1200        785 1300
                              5/17/96  55       100       26   52      104        39   92        34   16      150         425 195
                              5/18/96  476      40        44   96      56         24   20        28   70      215         40  75
                              6/23/96  62       30        15   350     94         26   9350      17   1400    1200        3200 320
                              6/24/96  78       24        34   152     78         4    266       8    140     550         480 310
                   Ge.o.Ave.           188      56        39   140     229        28   125       27   272     210         104 103
                   1993-94             233      35        42   220     418        44   99        42   272     123         56  79
                   1994-95             111      S6        25   95      176        19   107       22   317     181             68
                   1995-96             1268     90        62   146     156        26   219       22   229     453         242 220





              Table 17. Enterococci concentrations (per 100 ml) at all sites: 1993-%.


                                 9-EXT GB80 5-LMP GB15 S-OYS GBSO 5-BLM GB2 7-CCH GB21 5-SFR GB22
                          8124/93       9      9       10      9       9      9       10     9       70       10     10      9
                          9n193         20     9       20      9       10     9       60     10      50       9      10      9
                          10/5193       9      10      9       50      20     9       9      10      80       40     9       20
                          1Z/20/93      9      40      50      40      10     9       9      10      20       50     10      30
                          4/19/94       10             20      9       9      9       10     9       9        10     9       10
                          5/3/94        4      8       9       0.5     50     14      12     14      5        10     3       10
                          6/22/94       20     1       11.5    9       50     0.8     14     3       39       3      3       10
                          7/26/94       20     70      10      50      50     9       20     9       40       40     9       9
                          8/30/94              9               9              9              9                9              9
                          10/24194      30     9       20      30      70     9       20     9       20       80     20      10
                          11/8/94       9      9       9       20      50     9       30     20      20       20     20      9
                          3121/95       30     10      10              10     9       30     9       10       2D     9       20
                          4/18195       9      9       9       9       9      9       10     9       9        30     9       9
                          5/2/95        9      9       9       9       20     9       9      9       30       9      9       9
                          6/6/95        9      9       9       10      9      9       9      9       so       10     40      9
                          10/17)95      95     10      20      37      110    0.5     118    16.5    58       23     90      38
                          4/9/96        5      8       4       4       17.5   2-5     4      27.5    17       27     12      2
                          5n196         4.5    18      1.5     6.5     4      3.5     0.5    1.5     36       24.5   4.5     9
                          6/4/96        7      13.5    1.5     26.5    11.5   8.5     18     48.5    65       54     22      9
                Geo.Ave.                12     10      10      12      19     6       13     10      27       19     11      11
                1"3-94                  10     8       is      9       17     7       13     9       27       13     7       13
                1994-95                 14     12      10      16      22     9       16     10      n        20     14      10
                1"5-96                  11     12      4       13      17     2       8      13      39       30     18      9
                WET               9-EXT GB80 5-LMP GB15 5-OYS GB50 5-BLM                     GB2 7-CCH GB21 5-SFR GB22
                          9/9/93        100    92      80      60      28     72      10     74      85       52.5   8.5     68.5
                          9/27/93       80     30      17.5    4180    262    0.8     10     98      268      14     8       24
                          11/2/93       250    20      70      90      390    100     270    60      60       20     110     40
                          11/18/93      233    400     84      200     1930   70      700    240     120      265    13.5    190
                          12/6/93       505            403     350     1020   196     240    260     210      345    52      265
                          5/17/94       80     20      9       20      170    90      70     60      20       10     20      30
                          5/26/94       16     135     3       1115    102    59      43.5   17      37       124    30.5    16
                          6/13/94       7.5    5       155     60      75     10      22     19      90       257.5  46      60
                          6/14/94       60     9       9       40      110    240     20     50      130      9      70      20
                          8/22/94       79     77      23      86      245    17      33     32      50       50     25      28
                          9a6/94        150    400     230     190     260    40      80     40      260      140    190     350
                          11/1/94       46     85      17      660     11     4       550    21      39       550    6       38
                          11/2/94       258    48              440     1745   69      257    96      279      301    145     121
                          4/13/95                              116                                   100
                          4/14195       18     8       8       6       30     10      12     8       5        24     15      18
                          5/12/95       5      8       2       8       124    1       20     12      50       28     8       10
                          5/16/95       24.    15      1       16      132    30      75     46      35       68     20      24
                          5/17/95       27     is      6       28      48     9       18     5       20       32     32      14
                          9/18/95       2160   10      331     14      625    4       400    2       392      6      145     22
                          9/19/95       234    0       97      2       144    1       110    2       165      3      13      5
                          11/2/95       240    580     105     1035    150    42      128    375     135      485    58      36
                          11/3/95       380    590     380     420     1020   960     345    260     2580     595    148     222
                          5/17/96       55     37      2       15      50     32      61     34      30       111    32      18
                          5/18/96       62     33      7       10      126    15      24     20      31       54     20      20
                          6/23/96       31     24      13      23      59     3       34     1       81       147    87      32
                          6/24196       27     8       33      5       15     2       139    1       53       49     112     25
                Goo.Ave-                77     32      26      60      148    19      69     26      82       64     35      37
                1993-94                 80     36      37      127     210    46      S7     67      87       S4     28      so
                1994-95                 41     35      10      61      113    11      57     n       51       so     27      36
                1"5-96                  137    27      41      26      129    12      104    11      131      62     56      27






                \V-IX a;z-cc










             DURHAM                                MAINE






                                                                                   43  05



                           GREAT SAY


                           61390
                                                 PORTSMOUTH


                                     NEW HAMPSHIRE





            14-Exr


                                                      ATLANTIC OCEAN



                                                                                  4255-



                                                                  10 km



                    7055                               70 45'


            Figure 1. A map of the Great Bay Estuary and its tributaries showing freshwater and
            tidal sampling sites for the 1993-1994, 1994-1995 and 1995-1996 NPS studies





         Figure 2. Mean percent oxygen saturation in 1995-1996 dry weather vs storms








                     110.00%-,                                   -
                                                           96 Dry

                     100.00%-,                             96 Storm
                 C
                 0
                 0.-
                     90.00%-/



                     80.00%-
                 X
                 0

                     70.00%-/

                 AL

                     60.00%-/



                     50.00%-/
                               9    GB     5    GB     8     5     (M    5    GB2    11     7    (13    5    (33
                              EXT   80    LMP   15    OYS   OYS    50   BLM         OCh   OCH    21    SFR   22






         Figure 3. Mean TSS concentration in 1995-1996 dry weather vs storms








                   40-/

                   35-/                                  R 96 Dry
                z-J 30-/                                 N 96 Storm
                E
                   25-/
                0


                   20-/


                0
                   15-

                Ca
                   10-/-


                    5 -



                    0-
                       9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22





         Figure 4. Mean suspended particulate organic material in 1995-1996 dry weather vs storms







                   9-/



                                                          96 Dry
                   7-/
                                                          96 Storm
                 E
                 C 6-/
                 .2


                 0 4-/
                 0
                 2 3-/
                 0
                 CL
                   2-/




                   0 -
                      9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22






        Figure 5. Mean chlorophyll a concentration in 1995-1996 dry weather vs storm









                   35-/'


                   30-'/                                 El 96 Dry

                                                            96 Storm
                =L 25-/


                   20-/
                C

                00 15-


                   10-/


                     5-/



                    0
                       9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22





          FIGURE 6. Mean NI-14 Concentration in 1995-1996 dry weather vs storm









                     0.5-/

                    0.45-/
                     0.4-/                                   El 96 Dry
                                                                96 storm
                    0.35-/

                 -j  0.3-/
                 E  0.25-/

                 z   0.2-/




                     0.1-                         .......


                    0.05-


                       0
                          9 EXr GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50        5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22






          Figure 7. N03 Concentration in 1995-1996 dry weather vs storm









                     0 .6



                     0.5"                                     El 96 dry

                                                                 96 Storm
                  E  0.4-/
                  C
                  0


                     0.3-/


                  0
                  U
                  v) 0.2-/
                  0
                  z







                       0
                          9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22





          Figure 8. Dissolved inorganic nitrogen in 1995-1996 dry weather vs storm










                     0.9-/
                     0.8-/                                     F] 96 Dry

                  E
                     0.7-/                                        96 Storm

                  C
                  0  0.6-/

                     0.5-/

                  0  0.4-/
                  0
                  z  0.3-/
                  F3

                     0.2-/


                     0.1


                       0
                          9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22






          Figure 9. Mean dissolved organic nitrogen in 1995-1996 dry weather vs storm








                     0.6--/

                                                                                       El 96 Dry

                                                                                           96 Storm

                  E  0.4-
                  C
                  0


                     0.3-/


                  0
                  0
                  z  0.2-/'
                  0



                     0.1-/



                       0 /                              -     I      I      I      1       1
                          9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22





          Figure 10. Mean total dissolved nitrogen in 1995-1996 dry weather vs storms








                     1.2-/



                                                                   96 Dry

                                                                   96 Storms
                  E  0.8-/
                  c
                  0


                     0.6-/

                  0

                  z  0.4-/



                     0.2-/



                       0
                          9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50          5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22






        Figure 11. Mean P04 concentration in 1995-1996 dry weather vs storms








                   0.06-'/
                                                          96 Dry

                   0.05-"                                 96 Storm

                .j
                E  0.04-/
                C
                0


                   0.03-/

                0

                   0.02-/
                0
                IL


                   0.01-/



                      0
                         9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM GB2 11 CCh 7 CCH GB 21 5 SFR GB 22





           Figure 12. Interannual comparison of mean NH4 concentrations for dry and storm data combined









                         0.45-"


                          0.4-"
                      e-J 0.35-10                               El 93-94 Mean
                      Ca
                      E                                            94-95 Mean
                      C   0.3-"
                      Obw                                          95-96 Mean
                         0.25-'


                      C   0.2-
                      0





                      z
                          0.1-


                         0.05


                                            40
                                                                                              "Was
                            0               1                                                 1
                                 9      GB     5      CB      8      5     GB      5     GB2     11     7      (M     5      GB
                                EXT     80    LMP     15    OYS    OYS     50     BLOM          CCH    CCH     21    SFR     22
                                                                                                     0
                                                                                                     r
                                                        dw                                           I      IMP






          Figure 13. Interannual comparison of mean N03 concentration for dry and storm samples combined










                         0.6-"


                         0.5-'                          El 93-94 Mean

                      -j
                      CO                                    94-95 Mean

                         0.4-/
                      C
                                                            95-96 Mean



                      C  0.3-'

                      C


                         0.2-"
                      0



                         0.1-
                            0-j
                                 9     GB      5     (B      8      5      (M      5    GB2     11      7      GB      5     GB
                                ID(T   80     LMP    15     OYS OYS        50    BLM            OCH    OCH     21    SM      22





          Figure 14. Interannual comparison of mean P04 concentration in dry and storm samples combined








                                               El P04 93-94 Mean       P04 94-95 Mean        P04 95-96 Mean



                           0.05-'

                         0.045-"

                           0.04-"-
                      E
                         0.035-"

                           0.03-"

                         0.025-'

                      0    0.02-

                         0.015-"
                      0
                           0.01-1,
                         0.0051
                              0
                                   9     (B     5     CB      8      5     GB     5     GB2    11      7     CS     5      CB
                                  EXT    80    LMP     15    OYS OYS       50    BLM           OCH   CCH     21    SM      22






         Figure 15. Interannual comparison of mean TSS concentration In dry and storm samples'combined









                       40-"


                       35-"

                                                                              93-94 TSS Mean
                       30-
                    E                                                         94-95 TSS Mean

                    C
                    0  25-,'
                                                                              95-96 TSS Mean

                       20-lo


                       15-'


                       10J.-
                                                        Alm
                        5
                                                                                                              Ago-



                        0
                             9      GB     5     (M     8      5     GB     5     GB2    11      7     GB     5     (B
                             EXT    80    IMP    15    OYS    OYS    50    BLM           OCH   CCH     21    S:R    22





           Figure 16. Interannual comparison of mean dissolved organic nitrogen in dry and storm samples combined









                        0.4-,/
                       0.35-,/                                                                 El 94-95 Mean
                                                                                                   95-9 Mean

                        0.3-



                       0.25-

                    E   0.2-/
                   z
                   0

                       0.15-/


                        0.1-/


                       0.05-/


                           0-/
                              9 EXT GB 80 5 LMP GB 15 8 OYS 5 OYS GB 50 5 BLM G132 11 CCh 7 CCH GB 21 5 SFR GB 22






        Figure 17. Interannual comparison of mean percent oxygen saturation for dry and storm samples combined








                                                   F-I 94-95 Mean  95-96 Mean


                      120%-"


                      100%--,


                  C
                  0   80%-"



                      60%-
                  U)

                  N
                  0
                  aR  40%-


                      20%-'



                       0%-
                             9    (33   5    (33   8    5    (33   5    GB2   11    7    (33    5    GB
                            EXI"  80   LMP   15   OYS OYS    50    BLM        CCh  CCH   21    EFR   22





          Figure 18. Comparison of mean NH4 concentration in dry vs storm samples for the cumulative database








                        0.35-'/


                          0.3--/
                                                            NI-14 3 Yr Dry Mean
                     E  0.25-/                              NI-14 3 Yr Storm Mean

                     0
                          0.2-/


                        0.15-/
                     0





                     z


                        0.05-"



                           0
                                9     GB     5     (B      8      5     (33    5     G132   11     7      GB     5     GB
                               EXT    80    LMP    15     OYS OYS       50    BLM          OCH    OCH     21    SM     22






         Figure 19. Comparison of mean N03 concentration in dry vs storm samples for the cumulative database









                        0.5-/

                       0.45-/
                    .j  0.4-/                     E-1 N03 3 Yr Dry Mean
                                                     N03 3 Yr Storm Mean
                    E  0.35-/

                    C
                    0
                        0.3-/

                       0.25-/

                    0   0.2-/
                    a

                    CV)
                    0  0.15-/
                    z
                        0.1-


                       0.05-


                          0
                               9     (M     5      (M     8      5     (M     5     GB2    11     7      (B     5     GB
                              EXT    80    LMP     15    OYS OYS       50    BLM          OCH    CCH     21    SM     22





          Figure 20. Comparison of the mean P04 concentration In dry vs storm samples for the cumulative database







                                                   El P04 3 Yr Dry Mean        P04 3 YRr Storm Mean


                          0.05-,"

                         0.045-"

                          0.04-
                     E
                         0.035-"
                     0
                          0.03-/

                         0.025-"

                     0
                          0.02-"

                         0.015-/-
                     IV                                               I            I
                     0
                     IL   0.01-11

                         0.005-"

                              0+
                                  9    (33    5     CB     8      5     (33    5    GB2    11     7     GB     5     GB
                                 EKT   80    LMP    15    OYS OYS       50    BLM         CCH CCH       21    9ffl   22






         Figure 21. Comparison of the mean TSS concentration In dry vs storm samples for the cumulative database









                     40.00-"


                     35.00-,/
                  -j                                                  El TSS 3 Yr Dry Mean
                     30.00-/-
                  a
                  E                                                      TSS 3 Yr Storm Mean
                  0  25.00-/


                     20.00-/


                  0
                  a  15.00-


                     10.00-/-


                      5.00-
                      0.00-                WWI
                                        I     I                            w                                        1
                              9     (33   5     GS     8     5     (33    5    G132   11     7     (33    5     03
                             EXT    80   LMP    15    OYS OYS      50    BLM          CCH   OCH    21    51:14  22






         Figure 23. Comparison of meanpercent oxygen saturation for dry vs storm samples for the cumulative database









                                                   94-96 Mean Dry     94-96 Mean Storm


                      iio%-/,

                      100%_/'

                       go%-,,

                   .2  80%-


                       I V 70 -
                   M
                   u)  60%-
                   C
                   4)  50%-
                   CS
                   :Ift
                   X   40%-/
                   0
                       30%-/

                       20%-/

                       10%_/

                        0%-/
                             9    GB    5     GB    8    5    GB     5   G132   11    7    GB    5    GB
                            EXT   80   LMP    15   M OYS      50    BLM        OCh CCH     21   SM    22
                                         anew


                                         Em1w






         Figure 24. The relationship of TSS, SPOM and CHL a during the 9/18/95 storm Sampling date










                 180.00
                 160.00                                                    TSS mg/L
                                                                - - - - -  SPOM mg/L
                 140.00
                                                                 --------- CHL a gg/L
              _j 120.00

              =L
              13 100.00
              E
              cc
                  80.00

              co
              E   60.00


                  40.00


                  20.00


                     0.00
                         @7(            0.                                                                             cc      04
                                 GO                                      LC)                                   04      LL
                         w       M                              0       M      co      0                       co      CO
                         0)      0      LO                              0      Le)                                     LO     0





                        Figure 25. The relationship of TSS, SPOM and CHL a during the 9/19/96 storm sampling date










                                              120.00


                                                                                                                                                                                            TSS mg/L
                                              100.00
                                                                                                                                                                                            SPOM mg/L

                                                80.00                                                                                                             ---------                 CHL a gg/L

                                      =L

                                      V
                                                60.00

                                      -j
                                      co
                                      E         40.00


                                                20.00



                                                    mo
                                                                                                        (L                  LO                                      cO                   cS                  M                  M                                                                                EE
                                                                                                                                                                                                                i                                   o                    0                   CM                                      cm
                                                                                    co                                      CV0-                0                                        00                  00                                                                              ca                                      ca
                                                                                                                                                OD                  UI)                                      U)                                                                                                  W)






          Figure 26. Comparison of mean TSS, Chlorophyll a and suspended particulate organic material for storm samples 1995-1996








                  30

                                                                                CHL gg/L
                  25                                                 - - - - -  SPOM mg/L

                                                                     ---------  TSS mg/L
                  20




               0  15


               E
                  10




                    5




                    0
                     9       (B       5      GB       8       5       GB        5     G132     11      7       GB       5       (33
                    EXT      80      LMP     15      OYS     OYS      50     BLM              OCh     CCH      21      SFR      22









                                                                  Figure 27a. Geometric mean fecal coliform concentrations under wet and dry conditions in
                                                                                                              tributaries to Great Bay Estuary: 1995-%.

                                   700                                                                                                             STORM

                                                                                                                                             El DRY
                                   600



                                   500



                                   400



                                   300



                                   200



                                   100



                                       0
                                                                C                             kn             C.4)          CO)                                         C,4                                                                       C,4
                                                                00                            -4             >4            >0             W)                                                                                                     CI4
                                                  W             pq                            PQ             0             0              go            M                             U              U              pq
                                                                                                             00

                                                                                                                                              WE











                               Figure 27b. Geometric mean E. coli concentrations under wet and dry conditions in tributaries to
                                                                Great Bay Estuary: 1995-96.


                  500                                                         STORM

                  450                                                      El DRY


                  400


                  350


                  300


                  250





                  150


                  100


                    50


                     0

                                                  kn      GO     Eel                     C4                                     CA
                                  00              -4             >-,                     pq      U              CA              Cq
                                                                 0                               U                      V)
                                                          00

                                                                            SUE









                             Figure 27c. Geometric mean enterococci concentrations under wet and dry conditions in
                                               tributaries to Great Bay Estuary: 1995-96.


               160                                             STORM
               140                                           El DRY

               120



               100



               80 -



               60 -



               40 -



               20 -



                 0

                            00                                                 U
                                               0     0                         U     U      M     U)     PQ
                                               00    W1
                                                              SITE











                                Figure 28a. Geometric mean fecal coliform concentrations in water collected during the first or
                                      second day of significant sotrm events in tributaries to Great Bay Estuary: 1995-96.


                  900                                                       1 st day storm

                  800                                                      2nd day storm


                  700


                  600


                  500


                  400


                  300


                  200 -


                  100 -


                                                                                       NEW
                     0

                                                  W)      Cn     Ln                                                              C4
                                  00              1.4     >4     >.4                                                             ell
                                                          0      0                               U       U               Un
                                                                                                                         kn
                                                          00     W)              kn                      r-
                                                                            SITE









                                  Figure 28b. Geometric mean E. coli concentrations in water collected during the first or second
                                           day of significant sotrm events in tributaries to Great Bay Estuary: 1995-96.


                   600                                                      0 1 st day storm

                                                                            0 2nd day storm
                   500




                   400




                   300




                   200




                   100




                      0                 +
                                                    W)      U@      En      0                C4
                                    00              1-4     >.4     >.      In               M                                        N
                                                            0       0
                                                            00      kn                                       r-

                                                                               SITE










                                   Figure 28c. Geometric mean enterococci concentrations in water collected during the first or
                                       second day of significant sotrm events in tributaries to Great Bay Estuary: 1995-96.


                   200                                                      0 1 st day storm
                   180                                                         2nd day storm

                   160


                   140


                   120


                   100





                     60 -


                     40 -


                     20 -


                      0

                                                    W)      CA      Cn      0                                                         CI4
                                    00                                                       pq      U                                CI4
                                    pq              pq              0       pq               0       U       U
                            ON                              00

                                                                               SUE









                        Figure 29a. Geometric mean fecal coliform concentrations in water collected during dry weather
                                for three consecutive years in tributaries to Great Bay Estuary: 1993-96.


              300


                                                           1993-94

              250                                       El 1994-95

                                                           1995-96


              200




              150




              100




               50




                0
                    9-    GB80    5-    GB 15   5-   GB50     5-   GB2     7-    GB21    5-   GB22
                   EXT           LMP           OYS          BLM           CCH           SFR

                                                         SITE
                                         r











                       Figure 29b. Geometric mean E. coli concentrations in water collected during dry weather for three
                                     consecutive years in tributaries to Great Bay Estuary: 1993-96.


               250


                                                             1993-94

                                                          EI 1994-95
               200
                                                           01995-96



               150










                50




                                     M
               0 -aim
                     9-    GB80    5-    GB15    5-   GB50      5-   GB2     7-    GB21    5-    GB22
                    EXT           LMP           OYS           BLM           CCH           SFR

                                                          SITE









                       Figure 29c. Geometric mean enterococci concentrations in water collected during dry weather for
                                 three consecutive years in tributaries to Great Bay Estuary: 1993-96.


             40


                                                           1993-94
             35
                                                       El 1994-95


             30                                            1995-96



             25



             20



             15



             10
               5                                                     @i
               0                                                 id                   i
                   9-    OB80    5-    GB15    5-   GB50      5-   GB2     7-   GB21    5-    GB22
                  EXT           LMP           OYS           BLM           CCH           SFR

                                                        SUE











                              Figure 30a. Geometric mean fecal coliform concentrations in water collected during storm events
                                         for three consecutive years in tributaries to Great Bay Estuary: 1993-96.


                  1400


                                                                          1993-94
                  1200                                                 El 1994-95

                                                                          1995-96
                  1000



                  800



                  600



                  400



                  200
                                                                                                                  WN



                     0

                                                    in      C01)
                                   00               -0      >.                                                          Cq
                                                                                              U                 C4
                                                            0


                                                                        SITE









                      Figure 30b. Geometric mean E. coli concentrations in water collected during storm events for three
                                    consecutive years in tributaries to Great Bay Estuary: 1993-96.


             500

             450                                           1993-94

                                                           1994-95
             400
                                                           1995-96
             350


             300


             250





             150


             100


               50


                0
                    9-    GB80    5-   GB15     5-   GB50     5-   GB2     7-    GB21    5-    GB22
                   EXT           LMP           OYS          BLM           CCH           SFR
                                                         SrFE











                       Figure 30c. Geometric mean enterococci concentrations in water collected during storm events for
                                  three consecutive years in tributaries to Great Bay Estuary: 1993-96.


             250 -


                                                            1993-94

                                                        F-I 1994-95
             200 -
                                                         01995-96



             150









              50





               0

                    9-    GB80    5-    GB15    5-   GB50      5-   GB2    7-    GB21    5-    GB22
                   EX"r          LMP           OYS          BLM           CCH            SFR

                                                         SM











                             Figure 31a. Geometric mean fecal coliform concentrations in water collected during dry weather
                                and storm events for three consecutive years in tributaries to Great Bay Estuary: 1993-96,
                                                                    cumulative.



                 600

                                                                          Wet
                 500
                                                                       El Dry

                 400


                 300


                 200


                 100


                   0
                         9-     GB80      5-     GB15      5-     GB50       5-     GB2       7-     GB21       5-     GB22
                       EXT               LMP              OYS              BLM               CCH               SFR
                                                                       S
                                                                         TE
                                                                        I











                              Figure 31b. Geometric mean E. coli concentrations in water collected during dry weather and
                            storm events for three consecutive years in tributaries to Great Bay Estuary: 1993-96, cumulative.


                300



                                                                         Wet
                250
                                                                         Dry


                200




                150




                100




                  50
                                                                                 I IL
                         9-     GB80      5-     G1315     5-    GB50       5-     GB2       7-     GB21      5-     GB22
                        EXT              LMP             OYS              BLM              CCH               SFR

                                                                      SITE









                             Figure 31c. Geometric mean enterococci concentrations in water collected during dry weather and
                             storm events for three consecutive years in tributaries to Great Bay Estuary: 1993-96, cumulative.


                 160



                 140                                                      wet

                                                                        E]Dry
                 120



                 100



                  80



                  60



                  40



                  20



                    0
                         9-     GB80       5-    GB15       5-     GB50      5-     GB2       7-     GB21      5-     GB22
                        EXT              LMP              OYS              BLM               CCH              SFR

                                                                       SITE







                                                                                                                   NOAA COASTAL SERVICES CTR USRARY



                                                                                                                   3 6668 14111324 3