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Agreement CAB-80-08 -CHEMICAL QUALITY OF BOTTOM SEDIMENT SAMPLES FROM MOBILE BAY, ALABAMA Prepared for the ALaBAMA COASTAL Area Board Under Agreement No. CAB 80-08 and GSA Contract No. 80-3052 A. M. Malatino Chief, GeochEmical Water Quality Research DIVISION Geological SuRVEy of Alabama Tuscaloosa, Alabama September 1980 CHEMICAL QUALITY OF BOTTOM SEDIMENT SAMPLES FROM MOBILE BAY, ALABAMA Prepared for the Alabama Coastal Area Board Under Agreement No. CAB 80-08 and GSA Contract No. 80-3052 by A. M. Malatino Chief, Geochemical Water Quality Research Division Geological.Survey of Alabama Tuscaloosa, Alabama September 1980 "The preparation of this document was financed in part through a Federal grant from the Office of Coastal Zone Managment, National Oceanic and Atmosplieric Administration as authorized by the Coastal Zone Management Act of 1972; administered by the Alabama Coastal Area Board." OCT ? 4 7280 CHEMICAL QUALITY OF BOTTOM SEDIMENT SAMPLES FROM MOBILE BAY, ALABAMA INTRODUCTION AND PURPOSE Mobile Bay constitutes the primary depositional basin for more than two-thirds of the surface area of Alabama. The rivers dis- charging into the Bay drain a watershed of more than 43,000 square miles sending large amounts of water and sediment into a relatively small area. A study was conducted in 1979 to determine the mineralogy and spatial variation of clay species within Mobile Bay (Isphording, 1979). The textural distribution of Bay sediments obtained in the Isphording, 1979, study was used in selecting the sampling stations for this investigation. The purpose of this study was to determine the concentration and spatial trend of selected chemical constituents (metals, nutrients, organics, and pesticides) in the Mobile Bay sediments. An understanding of the chemical composition of the sediment will help provide basic information needed for a comprehensive picture of the quality of the estuarine environment. STUDY METHODS The study area is defined as Mobile Bay, extending from U.S. Highway 90 on the north to Dauphin Island on the south. The sam- pling stations were located by the Loran C navigation map system. One-meter core samples of the Bay bottom were taken with a 3-inch diameter PVC plastic-lined Phleger core sampler at 60 sites in Mobile Bay (see location map in pocket). Samples collected at 20 of these sites were separated into top and bottom samples to provide greater detail on the vertical distribution of chemical constit- uents. A total of 80 samples were collected, which included five additional samples in case of damage during transportation or while in the laboratory. After the sediment samples were recovered, they were immedi- ately transferred to polycarbonate bags and placed on ice at 4 degrees centigrade (,'C) during transportation to the Geological Survey of Alabama Geocbemical Laboratory in Tuscaloosa. The samples were then placed in a refrigerator and kept at 4*C until time of analysis. The bottom sediment samples were analyzed for 19 metals, volatile solids, organic carbon, 12.pesticide species, and two nutrients (nitrogen (N) and phosphorus (P)). Total recoverable metal analyses were performed by atomic absorption spectrophotometry after acid digestion, according to the U.S. Corps of Engineers (COE, 1976) and U.S. Environmental Protec- tion Agency (USEPA, 1979) methods. Complete dissolution of all bottom material is not readily achieved by this.digestion procedure and thus the determination represents less than 95% of the total amount present in the sample. Analyses for nutrients, organic carbon, and volatile solids followed EPA (USEPA, 1979) methods. Pesticides were analyzed by the U.S. Department of.Health, Educa- tion and Welfare, Food and Drug Administration (USDHEM-FDA, 1977) procedures for detecting chlorinated hydrocarbons by Gas Chroma- tography equipped with dual electron capture. III. RESULTS The metal analyses of the bottom sediments were tabulated to 2 show spatial trends within the Bay (table A-1) The concentration of aluminum in the Bay sediment samples ranged from 10 to 50 micrograms per gram (vg/gm).l Arsenic concentrations in the samples ranged from 1 to 14 Pg/gm - Barium concentrations in the sediment ranged from 10 to 640 pg/gm. The highest concentration (640 Vg/gm) occurred in the top 20 centimeters of sediment from station 6A, whereas the concentration in the bottom portion of the sample was approximately one-third of the upper concentration (.240 Vg/gm). Cadmium concentrations in the sediment ranged from less than 10 to 10 Vg/gm. Calcium concentrations ranged from not detectable (ND) to 67,000 Vg/gm. The station with the highest calcium level corres- ponded to the station (station 6A - top) with the highest barium level. The concentration of cobalt in the sediment ranged from les@s than 5 to 30 jig/gm. Iron concentrations i.n. the sediment samples ranged from 2,000 to 42,000 pg/gm. The station with the highest iron concentration was number 16. The lowest iron concentration (2,000 pg/gm) in the Bay sediment samples occurred at station 46 in the northwest por- tion of Mobile Bay. Lead concentrations in the sediment samples ranged from NTD to less than 10 ijg/gm. Mic.rograms per gram (pg/gm) is equivalent to milligrams per kilogram (Tng/kg) which is also equal to parts per million (ppm). 3 Mercury concentrations in the sediment samples ranged from less than 0.2 to 1.1 jig/gm. The highest values occurred at station 10 (1.1 pg/gm), station 9A - bottom (0.9 pg/gm) and station 11 - top *(0.9 pg/gm). Station 10 is located 1 mile east of Heron Bay and stations 9A and 11 are located in Bon Secour Bay, 4.3 and 8.8 nautical miles, respectively, due west of Cypress Point (location map). Manganese concentrations in the Bay samples ranged from 12 to 1,600 pg/gm. The highest level occurred at.station 21 - bottom. Magnesium concentrations in the Bay samples ranged from 80 to 7,200 vg/gm. The highest magnesium level occurred at three stations (I - top, 21 - bottom, and 26 - top). Selenium concentrations in the Bay samples ranged from less than I to 1.0 vg/gm. Silicon concentrations in the Bay samples ranged, from I to 10 pg/gm. Concentrations would probably be higher if a caustic soluble method or hydrofluoric acid digestion procedure were used. However, since nitric and hydrochloric acids were used in the acid digest- ible procedure.. sands were not totally dissolved. This should be kept in mind when reviewing the silicon data in this report. Total silicon may be a factor of 10 or more than the reported acid dis- solved concentration. Silver and titanium concentrations in the Bay sediment samples were all less than 10 pg/gm. Strontium concentrations in the Bay sediment samples ranged from 10 to 390 vg/gm. The highest concentration occurred at station 6A - top. 4 Zinc concentrations in the sediment samples ranged from 40 to 1,200 Pg/gm. The highest concentration occurred at station 44. Copper concentrations in the Bay sediments ranged from 5 to 120 pg/gm. The highest concentration occurred at station IA. Chromium concentrations' ranged from ND to 90 1jg/gm. The high- est concentrations occurred at stations 9 - top and 9A --bottom. The percent concentrations of nutrients (N and P), volatile solids, and organic carbon are given in table A-3. Nitrogen ranged from 0.0000 to .019 percent (%) in all 80 sediment samples. The highest percent nitrogen (.019%) or 190 pg/gm occurred at station I - bottom. Organic carbon ranged from .02 to .12. The highest percentage (.12%) occurred at stations 6A - top and 8A - top and bottom. Phosphorus ra nged from .0000 to .0019Z in all Bay sediment samples. The highest phosphorus percentage occurred at stations 9 bottom and 9A - bottom. Volatile solids ranged from 0.2 to 9.1%. The highest percent- age of vol atile solids occurred at station 9A top. Of the 12 pesticide species analyzed in the sediment samples, Lindane, Heptachlor, Aldrin; p, p'-DDD; p,p'-DDE; Polychlorinated biphenyl (PCB 1254), PCB 1260, Heptachlor epoxide, Pentacbloro- phenol (PCP), Dieldrin, and Endrin were the species identified and quantified by Gas Chromatography (table A-2). Lindane concentrations ranged from ND to 2.01 pg/kg per dry weight. The higbest level occurred at station 9A,- top. Heptachlor concentrations ranged from ND to 3.66 vg/kg. The highest level occurred at station 49. 5 Aldrin concentrations ranged from ND to 1.22 Vg/kg. The high- est value occurred at station 49, west of Little Sand Island at the mouth of the Mobile River. The concentration of p, p'-DDD ranged from ND to .88 jig/kg. The highest value occurred at station 49 with station 47 having .87 vg/kg of DDD. The p,p'-DDE concentrations for the Mobile Bay sediments ranged from ND to 2.66 pg/kg. The highest value occurred at station 9A - top. Only 5 of the 33 sediment samples had DDE present. There was no DDT present in any of the 33 sediment samples. The concentrations of PCB 1254 and PCB 1260 ranged from ND to 1.09 and ND to 1.02 pg/kg, respectively. The highest concentration of PCB 1254 occurred at station 37. The highest level of PCB 1260 occurred at station 9A top. The concentration of Heptachlor epoxide in the bottom sediment samples ranged from ND to .99 pg/kg. The highest Heptacblor epoxide concentration occurred at station 37. The identification of PCP occurred at four sampling stations (16, 27, 35, and 45). Station 27 had the highest PCP level at 1.30 jig/kg. Dieldrin concentrations ranged from ND to 4.18 pg/kg. The highest concentration occurred at station 45 approximately 2.8 miles south of the Causeway at Battleship. Parkway (U.S. Highway 90) in the upper northwest section of the Bay. Endrin was identified at seven stations. Stations 27 and 25 - bottom had the highest Endrin concentrations of 1.38 and 1.03 vg/kg, respectively. 6 IV. DISCUSSION The process of sedimentation in the Mobile Bay area is dependent on many physical variables such as fresh-water currents, tidal move- ments, depth, wind and bottom topography. The sediment samples were analyzed for a broad spectrum of metals and pesticides to identify areas that are high in deposits of toxic materials. The accumulation of such toxic materials over a period of time would be detrimental to the life of the estuarine environment. The samples were found to consist primarily of compounds of four (4) elements: calcium, magnesium, iron, and manganese (Table A-1). These elements are naturally occurring and are classified as non-critical (Brownlow, 1979). The occurrence of high concentra- tions of these elements were uniformly distributed throughout the area. Concentrations of the toxic metals cobalt, copper, zinc, arsenic, selenium, silver, cadmium, mercury, and lead, were low and their occurrences were distributed uniformly throughout the study area. Titanium was found in low concentrations. in the samples. Low concentrations of barium were also noted in each sample. The remaining metals, aluminum, strontium, and silicon (noncritical elements), were found in low concentrations. Nitrogen, phosphorous and carbon appeared in low concentrations were equally distributed in all samples. Volatile solids concentrations were found to be relatively uniform throughout the Bay area (Table A-2). The pesticide analyses included identifying and quantifying 11 pesticide species that were widely distributed (Table A-3). Four pesticide species: Aldrin, PCB 1254, Dieldrin, and Endrin, were 7 dominant in occurrence. The occurrence may indicate less than ideal conditions of any pesticides, however, no spatial trends were established by the data. This study provides reasonably comprehensive background data on present levels and concentration areas of chemical elements in the Bay sediments; future sampling and analysis might be done within the Bay as additional areas of inquiry are identified and funding permits. 8 REFERENCES Brownlow, Arthur H. , 1979, Geocbemistry: Boston University, Prentice- Hall, Englewood Cliffs, N.J., p. 256. Isphording, Wayne C., and Lamb, George M., 1979, The sediments of Mobile Bay: a report for the Alabama Coastal-Area Board, 23 p. U.S. Department of Health, Education and Welfare, Food and Drug Adminis- tration, 1977, Analysis of pesticide residues in human and environ- mental samples: vol. 1, Springfield, Virginia, Nat'l. Tech. Inf. Serv., Reproducers. U.S. Army Corps of Engineers, 1976, Ecological evaluation of proposed discharge of dredged or fill material into navigable waters: U.S. Army Corps of Engineers, Mobile, Alabama District, Misc. Paper D-76-17, 33 p. U.S. Environmental Protection Agency, 1979, Method for chemical analysis of water and wastes: Cincinnati, Ohio, Environmental Monitoring and Support Laboratory, Environmental Research Center, 298 p. 9 CHEMICAL DATA (Tables A-1 tbrough A-3) 10 'rable A-1 Chemical Concentrations of Bottom Sediment Samples Collected from Mobile Bay, Alabama, June 15 through 21, 1980. E E STATION G :1 E :3 5 E >1 (U =3 4j 0 1DENTIFICATION E C -@* r- - :3 lu U (U r- C (U E NUMBER (UM E M U C, m 0, C 07 -0 C, U Cn U, M C: 1@1 a IM U M ru M CL t7) a L. a-- -- -- 'E! C" 1- 11 $- - C Ct. .0 0 L. C or, -. 'T '!@ :: 4J 1@ M (:n M 01 01 o g: cy a; cn u cy, M En 6 Z a) ;:5 rn o m co :3 Z: :5 X: =1 :5 U :3 U U t 6 -1 X: Z :3 LA :3 U 24626-M I-A 10 10 20 <10 2200 30 34000 <10 0.5 620 5200 1 1 <10 40 160 <10 120 40 24627-M 1-TOP 20 11 20 <10 3200 30 37000 ND* 0.4 1000 7200 1 1 <10 50 180 <10 100 30 24628-M 1-BOTTOM 20 9 20 <10 12000 20 31000 0.4 720 6600 1 2 <10 110 130 <10 70 20 24629-M 2-TOP 20 7 100 <10 8200 20 33000 NO 0.4 920 6600 1 1 <10 80 100 <10 40 10 24630-M 2-BOTTOM 10 7 60 <10 12000 20 40000 NO 0.3 720 5800 1 1 <10 90 90 <10 40 5 24631-MI 3 21 11 100 <10 4000 20 36000 NO 0.2 640 7000 1 1 <10 60 120 <10 50 10 2-1632-M 3-A TOP '20 11 30 <10 4000 30 41000 NO 0.2 620 7000 1 2 <10 so 110 <10 80 10 24633-M 3-A BOTTOM 22 12 30 <10 3800 20 41000 NO 0.4 940 6600 1 1 <10 50 150 <10 20 5 24634-M 4A 20 11 50 <10 2200 20 35000 NO 0.3 920 5800 1 1 <10 40 100 <10 40 NO 24635-M 4 TOP 20 12 50 <10 3000 30 39000 NO <0.2 700 6600 <1 I <10 50 160 <10 20 <5 24636-M 4-GOTTOM 20 10 40 <10 3200 30 38000 <10 0.3 1300 7000 1 2 <10 60 140 <10 70 30 24637-M 5-TOP 20 8 50 <10 3800 20 38000 NO 0.3 1100 6400 1 2 <10 60 240 <10 20 30 24638-M 5-BOTTOM 10 11 50 <10 6600 20 31000 NO 0.2 800 5800 <1 2 <10 70 340 <10 20 20 24639-M 6 20 11 50 <10 5400 20 35000 NO 0.2 800 6400 1 2 <10 70 140 <10, 60 30 24640-M 6A-TOP 10 3 640 <10 67000 10 21000 NO <0.2 460 4600 1 1 <10 390 80 <10 30 10 24641-M 6A-BOTTOM 10 9 240 <10 27000 20 26000 NO 0.3 580 5600 1 2 <10 180 110 <10 30 10 24642-M 7-TOP 10 6 320 <10 36000 10 24000 NO 0.2 920 5200 <1 2 <10 180 80 <10 20 20 *N0 - Specifically analyzed for but not detectable. **ijg/g microgranis per gram. S rA T 103 LA E :3 :1 r- E w a i ouir tri CAT ION L: 41 vi 0 cn NUMBER al 0i V) cn C71 cn m c cn V ol u m c w M 4m 01 > 0 u cr m ON C3. r- 11 Ul 7-" S- 0.11 0, L- M IU m 'o a, 0, o cn ai m cu m rtj cn ai - al j M c" m 0 c" m @ 0, :3 g4 Z) -C :3 coD L) :3 u :3 -1 = X = 2: x :3 V) V) tno =3 24643-M 7-BOTTOM 10 9 '80 <10 11000 20 30000 NO @cO. 2 860 6200 1 2 <10 80 110 <10 20 20 24644-M 8 20 11 20 <10 4400 20 38000 NO <O. 2 760 5800 1 2 <10 60 110 <10 30 30 24645-M 8A-TOP 20 11 20 <10 1800 20 34000 NO 0.2 840 4800 < 1 2 <10 50 140 <10 30 30 24646-M 8A-BOTTOM 50 10 20 10 NO 20 33000 <10 0.2 520 6000 1 8 <10 20 170 <10 90 80 24647-M 9-TOP 40 11 30 <10 200 20 35000 <10 0.2 600 4800 1 8 <10 30 160 <10 40 90 24648-M 9 BOTTOM 50 10 20 <10 200 20 39000 <10 <0.2 640 5000 1 8 <10 30 190 <10 60 80 24649-M 9A-TOP 50 12 20 <10 200 20 38000 <10 0.2 520 6200 1 4 <10 70 190 <10 40 80 24650-M 9A-BOTTOM 50 12 20 10 200 20 40000 <10 0.9 600 5200 1 5 <10 20 180 <10 40 90 24651-M 10 50 11 20 <10 200 20 36000 <10 1.1 760 6600 1 3 <10 40 180 <10 50 80 24652-M 11-TOP 50 12 20 <10 200 20 39000 NO 0.9 560 6000 1 10 <10 30 300 <10 60 80 24653-M 11-BOTTOM 50 11 20 <10 NO 20 40000 NO 0.5 520 5200 1 9 <10 30 160 <10 50 80 24654-M 12 40 11 20 <10 20 20 36000 NO 0.4 740 6000 1 6 <10 30 220 <10 40 70 24655-M 13A 10 3 10 <10 20 20 7200 NO 0.2 120 1600 <1 I <10 20 60 <10 60 30 24656-M 13-TOP 40 12 30 10 20 20 37000 NO 0.3 500 4800 1 5 <10 20 480 <10 70 60 24057-M 13-GOTTOM 40 11 30 10 200 30 36000 NO 0.2 500 4600 1 5 <10 20 260 <10 60 50 24658-M 14 40 13 30 10 200 30 36000 NO 0.6 640 4600 1 4 <10 20 160 <10 30 60 24659-11 -15-TOP 40 11 40 10 200 30 36000 NO 0.5 660 5200 1 5 <10 30 220 <10 40 70 24660-M 15 BOTTOM 50 14 30 10 200 30 41000 NO 0.2 680 5400 1 5 <10 20 440 <10 40 80 latile A-1 (.ont*d cu E E E tA 2 E STATION -3 C: JUENTIFICATION a) u ai 0, NUMBER a, cu 01 t7lE 0) u CY, 10 ON c 0) a En u cn U% cm a cp 'LU cn CP 4: 01 0 tm u M ra M CL -- 'A " -, -a-- - -- @o '- 0'- L C: cn 11 11 - s- 41 Q. a, al u ol m M 0, 0 ul 4, ai rn 4J ;:: 0 cm @ a, 0) cn (L) M 1%3 01 lu a) LA= :3 m :3u = =) L.)z -j =5 2: :3 2: 0 = = Lnm 24661-M 16 40 13 30 10 200 30 42000 NO 0.4 920 5200 <1 5 <10 20 220 <10 70 70 24662-M 17 40 13 30 10 200 30 39000 NO 0.3 640 5000 1 5 <10 30 180 <10 50 70 24663-M 17A 20 6 20 <10 200 10 18500 NO <0.2 340 2400 <1 4 <10 20 170 <10 10 20 24664-M 18-TOP 30 13 30 10 200 30 32000 NO 0.2 840 5000 <1 3 <10 20 300 <10 90 50 24665-M 18 BOTTOM 40 12 30 <10 200 10 36000 NO 0.2 880 5600 1 6 <10 20 230 <10 30 70 24666-M 19 10 11 .50 10 200 20 34000 NO 0.3 480 4000 1 3 <10 20 200 <10 70 60 24667-M 20-TOP 50 12 30 10 200 20 37000 NO 0.2 560 4600 1 3 <10 20 190 <10 50 70 24668-M 20-BOTTOM 50 11 20 <10 1200 10 31000 NO 0.4 480 5200 1 1 <10 40 120 <10 70 40 24669-M 21-TOP 50 8 50 <10 2400 20 33000 NO 0.3 940 5800 1 1 <10 50 150 <10 30 30 24670-M 21-BOTTOM 50 11 30 <10 3000 20 40000 NO 0.2 1600 7200 1 1 <10 60 230 <10 30 50 24671-M 22-TOP 40 12 100 <10 5400 20 38000 NO <0.2 680 6000 1 1 @10 70 170 <10 30 50 24672-M 22-BOTTOM 40 12 70 <10 4800 20 39000 No 0.2 640 5800 <1 1 <10 60 50 <10 30 50 24673-M 23 40 7 100 <10 7400 10 28000 NO 0.2 420 4200 <1 1 <10 60 140 <10 40 40 24674-M 24-TOP 40 2 20 <10 56000 10 6000 NO <0.2 260 1300 <1 1 <10 190 110 <10 30 20 24675-M 24-BOTTOM 20 3 20 <10 36000 10 -6400 NO <0.2 220 1400 <1 I <10 140 50 <10 30 20 24676-M 25-TOP 30 11 20 <10 430OU 20 34000 NO 0.2 700 5000 1 1 <10 60 170 <10. 80 50 24677-M 25-BOTTOM 3D 11 30 <10 2200 30 37000 NO <0.2 760 5600 1 1 <10 50 240 <10 40 50 24678-M 26-TOP 40 10 80 <10 4000 20 38000 NO 0.2 540 7200 1 1 <10 60 270 <10 70 50 G E 5 TAT !Otl E rz E >@ (U .- :5 a ..,:, c LA 0 I OF. NT IF I CAT I ON c :3 m Q) C cu E cn (U a, cr C" u M M M c m a m rn m r- NUMBER 'M 0 u m M CL cn a) ru al 0 m m 41 c" 0, m Cm 01 M rn 4j a' :3 V) Ln Ln :3 tj u u :3 24679-11 26 BOTTOM 10 10 110 <10 2200 30 38000 NO 0.2 640 6600 <1 1 tIO 60 140 <10 30 50 2400-M 27 10 9 140 <10 2800 30 41000 NO 0.3 1500 7000 1 1 <10 60 210 <10 30 60 24681-M 28 20 7 70 <10 2000 10 23000 NO <0.2 580 3000 <1 1 -CIO 30 160 <10 20 30 24682-11 29 20 5 50 <10 NO 10 9200 NO 0.2 180 1300 <1 1 <10 20 100 <10 30 20 24683-,M 30 20 11 50 <10 9400 20 37000 ND- 0.12 640 4200 <1 I <10 60 170 <10 30 30 24684-M 31 40 8 40 <10 4800 30 35000 NO 0.2 640 6000 <1 1 -c 10 60 220 <10 40 50 24685-M 32 40 8 40 <10 6400 20 23000 NO 0.2 400 4000 1 1 <10 50 660 <10 20 20 24686-M 32 A 10 9 10 <10 2000 20 32000 NO 0.2 800 4800 1 1 <10 40 320 <10 70 50 24687-M 33 20 2 20 <10 6000 < 5 32000 NO 0.3 66 400 <1 1 <10 40 40 <10 40 10 24688-M 34 20 9 20 <10 2400 20 17000 NO 0.3 180 4400 <1 1 <10 40 640 <10 40 40 24689-M 35 20 7 20 <10 600 10 34000 NO <0.2 660 2600 <1 2 <10 20 130 <10 20 20 24690-M 36 20 11 20 <10 4200 20 25000 NO 0.2 460 6200 1 1 <10 60 290 <10 40 50 24691-M 37 20 a 20 <10 5200 10 6600 NO <0.2 110 3600 1 1 <10 50 140 <10 30 30 24692-M 38 20 3 20 <10 1800 < 5 3200 NO <0.2 820 840 1 1 <10 20 570 <10 20 10 24693-M 39 20 10 20 <10 1600 20 29000 NO <O-2 980 4400 1 1 <10 40 210 <10 40 40 24694-M 40 20 10 20 <10 1800 20 17000 NO 0-2 480 4400 1 1 <10 40 420 <10 30 40 24695-M 41 40 5 20 <10 1000 10 17000 NO 0-2 420 2000 1 1 <10 20 750 <10 10 20 24696-M 42 40 6 20 <10 2800 30 29000 NO <O-2 720 4200 1 2 <10 40 250 <10 40 40 Table A-1 CoWd E E STAT 1011 3 E E IDENT irICATION A 0 L cli w w NUMBER njM z C', E cn u 0, NQ, a Ch a, u cy, a, m > C7, u m m 0. 0, 10 CP m m ro 0, 0m S- cn 0) cr m M m al 0 m J-- cn V co :3 u :) u = L)= - :3 2: LA m tA :3 Ln :1 =9 3 tjv 24697-M 43 40 3 20 <10 1400 5 6000 ND <0.2 220 680 1 1 <1'0 10 990 <10 5 10 24698-M 44 50 5 20 <10 4600 10 14000 NO <0.2 340 1900 1 1 <10 30 1200 <10 25 20 24699-M 45 10 9 20 <10 3600 20 28000 NO 0.2 560 4200 1 1 <10 40 220 <10 20 40 25700-M 46 10 2 10 <10 3600 5 2000 NO <0.2 240 4400 <1 I <10 120 210 <10 30 10 25701-M 47 10 2 10 <10 9200 5 3000 NO <0.2 66 440 <1 I <10 40 180 <10 30 10 25702-M 47A 10 1 10 <10 5400 10 3000 NO <0.2 18 600 <1 I <10 20 230 <10 10 < 5 2570341 48 10 2 10 <10 600 5 2600 NO <0.2 12 80 <1 1 <10 10 410 <10 20 <5 24704-M 49 10 4 10 <10 6800 10 5400 NO <0.2 86 260 <1 I <10 40 170 <10 30 10 24705-M 50 10 2 10 <10 2200 10 2400 NO <0.2 34 180 <1 1 <10 10 60 <10 20 5 'rable A-Z - Pes.ticide concentrations in micrograms rer %ituyrtim @,Oqjyjq) D ry Weight, from Bottom Sediments Collected at 33 Stations in Mobile Bay, Alabama, June 15 through 21, 1980. LU C1 C:) LO STATION U r_ n C\j C\j U -0 M I 1 .4 ro -- IDENTIFICATION 4-j - - 4-J X CL -0 CL C- co CL 0 NUMBER U L-) aj 0- U C@ CZ C@ 0- Cl. CL. 1-A ND .81 .40 ND ND ND ND ND ND NO .29 ND 3-A BOTTOM .38 ND .15 ND ND ND ND ND ND ND ND ND 7 TOP .12 N D .34 ND ND ND .26 ND ND ND @.57 ND 9-A TOP 2.01 .31 ND ND 2.66 ND ND 1.02 ND ND ND ND 11 TOP N 0 .21 .77 ND ND ND ND N D ND ND ND ND 13 TOP ND ND .44 ND ND ND .46 .28 ND ND .18 ND 14 ND N D 15 ND ND ND .62 ND ND ND .61 ..68 15 TOP ND ND .29 ND ND ND NO ND ND NO .36 ND 16 ND ND N D ND ND ND ND ND ND .36 1.38 N D 17 ND ND .39 ND ND ND .26 ND ND ND 48 .29 19 ND ND N D ND- ND ND .68 .51 ND ND ND ND 23 ND ND .22 N D .13 ND .65 .45 .43 ND ND .59 25 BOTTOM ND ND .36 N D 14 D ND .86 ND .12 ND 1'. 00 1.03 27 .24 3.40 .48 ND ND ND NO ND ND 1.30 .42 1.38 28 N D N D .29 N D N D ND ND ND ND ND .72 N D 29 TOP .11 .28 .28 NO .46 NO ND ND NO ND .90 N D *ND - Specifically analyzed for but not detectable. ui CD STATION Ln -C (U CD C3 C"i u -0 IDENTIFICATION 4-) X 41 CL co co CL 0 cu _0 NUMBER a- CL u < CZ CL 30 .21 NO .27 NO N D NO .34 ND NO N D .40 ND 31 NO NO .28 NO .13 NO .37 NO NO NO NO ND 33 NO N D .17 14D 14 D NO NO NO N D NO .15 NO 34 NO NO .21 NO NO NO NO NO ND N D .50 NO 35 NO NO .25 NO NO NO ND N D NO .46 NO NO 36 ND NO .14 ND NO NO ND .43 NO ND .23 NO 37 .36 .25 .26 NO NO NO 1.09 .22 .99 NO .17 NO 38 NO NO 14 NO NO NO NO NO .10 NO .38 ..47 39 NO NO NO NO N D NO NO NO NO NO .60 NO 40 .11 .25 .32 NO NO NO NO NO. N D NO .76 NO 41 NO NO .89 NO .92 NO NO NO .86 N D NO N D 43 NO .15 .71 NO NO NO ND NO NO NO .12 NO 44 .21 NO .75 ND NO NO N D ND .63 NO NO NO 45 NO NO .47 .62 NO NO NO NO NO .87 4*. 18 .36 47 NO 1-1 D .49 .87 ND NO .18 .65 NO NO .55 N D 48 NO NO NO NO NO NO NO N D NO NO NO NO 49 NO 3.66 1.22 .88 ND NO NO NO NO ND .40 NO n ment- t'o*l I e'cte-d- -f-ram- e b ay 1\1 ab ama In the t3ottOli * 5 i! di .June 15 through 21, 1980 r- cu s- U a) 0 - M Ln j_- c: 0 -4-j 0. 0 STATION to s- flo LO 0)4-.) r--- 0 IDENTIFICATION 0 0 NUMBER C) :::. V) 24626-M 1-A .0006 2.1 .0004 .07 24627-M 1 TOP .0015 1.7 .0004 .07 24628-M 1 BOTTOM .0190 3.1 .0004 .07 24629-M 2 TOP .0017 3.1 .0004 .10 24630-M 2 BOTTOM .0025, 3.2 .0003 .07 24631-M 3 .0007 2.5 .0004 .11 ca 24632-M 3-A TOP .0014 3.0 .0004 .07 24633-M 3-A BOTTOM .0022 4.9 .0004 .08 24634-M 4-A .0019 4.1 .0003 .09 24635-M 4 TOP .0023 5.2 .0006 .11 24636-M 4 BOTTOM .0008 4.8 .0007 .08 24637-M 5 TOP .0003 6.6 .0006 .11 24638-M 5 BOTTOM .0002 2.9 .0005 .10 24639-M 6 .0008 6.9 .0005 .09 24640-M 6-A TOP .0027 3.5 .0007 .12 24641-M 6-A BOTTOM* .0004 2.6 .0007 .10 24642-M 7 TOP .0028- 3.0 .0006 .10 Ln -0 CL C: 0 STATION fo Ln ra M4@ 0 0) IDENTIFICATION- 0 0 = . S- m NUMBER C) 7-, >. (n ri. C) 24643-M 7 BOTTOM .0008 @3.6 .0003 .09 24644-M 8 .0014 4.0 .0005 .09 24645-M 8-A TOP .0024 3.5 .0008 .12 24646-M 8-A BOTTOM .0021 4.0 .0005 .12 24647-M 9 TOP .0008 1.2 .0007 .09 24648-M 9 BOTTOM .0016 3.7 .0019 .11 24649-M 9-A TOP .0015 9.1 .0008 .10 24650-M 9-A BOTTOM .0019 4.6 .0019 .09 24651-M 10 .0008 2.8 .0004 .09 24652-M 11 TOP .0024 4.1 .0010 .09 24653-M 11 BOTTOM .0015 3.9 .0009 .08 24654-M 12 .0016 2.8 .0005 .09 24655-M 13-A .0013 1.0 .0002 .06 24656-M 13 TOP' .0015 4.2 .0007 .08 24657-M 13 BOTTOM .0012 3.1 .0006 .08 24658-M 14 .0017 2.8 .0005 .08 24659-M 15 TOP .0014 2.9 .0003 .09 24660-M 15 BOTTOM .0017 3.1 .0005 .08 24661-M 16 .0017 3.3 .0005 .07 S.- 0 STATION 0) Ln _r_ 0 0- 0 IDENTIFICATION LA -0 M 4-J s- NUMBER S- 0 0 ro C=) 2-1 ---- V) CL C) u ZA @rk 'Zrz &,2 , 'e. .. . 24662-M 17 .0021 3.3 .0013 .04 24663-M 17-A .0009 1.7 .0003 .07 24664-M 18 TOP .0013 3.6 .0008 .09 '24665-M 18 BOTTOM .0012 3.0 .0007 .09 24666-M 19 .0014 3.7 .0016 .07 24667-M 20 TOP .0007 3.0 .0005 .08 24668-M 20 BOTTOM .0018 2.7 .0007 o7 24669-M 21 TOP .0018 3.1 .0017 .09 24670-M 21 BOTTOM .0008 4.0 .0006 .09 24671-M 22 TOP .0004 3.8 .0009 .08 24672-M 22 BOTTOM .0010 4.0 .0010 .09 24673-M 23 .0007 2.0 .0003 .08 24674-M 24 TOP. .0002 0.6 .0001 .06 24675-M 24 BOTTOM .0002 0.6 .0001 .05 24676-M 25 TOP .0011 2.5 .0003 .07 24677-M 25 BOTTOM .0012 2.2 .0002 .07 24678-M 26 TOP .0009 2.2 .0002 .06 24679-M 26 BOTTOM .0009 2.7 .0004 .07 24680-M 27 .0021 4.1 0005 .07 Table A-3 Cont'd u Gi 0 u 4-3 -0 a 0 STATION ro .- ro -0 CM 4--) - - m @- I-DENTIFICATION s- - - 0 0 (o 02-1 >. Ln C) u NUMBER i@A 'a-Z Id-9 24681-M 28 .0011 2.2 .0003 .07 24682-M 29 .0013 1.1 .0003 .05 24683-M 30 .0019 3.4 .0004 .06 2 4684-M 31 .0000 3.8 .0005 .07 24685-M 32 .0001 1.7 .0002 .06 24686-M 32-A .0000 3.5 .0008 .08 24687-M 33 .0000 0.4 .0001 .04 24688-M 34 .0000 4.3 .0006 .08 24689-M 35 .0000 1.4 .0002 .05 24690-M 36 .0004 2.7 .0005 .06 24691-M 37 .0000 2.7 .0007 .05 24692-M 38 .0001 0.9 .0001 .04 24693-M 39 .0000 2.7 .0008 .06 24694-M 40 .0007 2.7 .0006 .06 24695-M 41 .0002 1.2 .0002 .04 24696-M 42 .0002 2.0 .0003 .05 24697-M 43 .0000 0.5 .0002 .02 24698-M 44 .0001, 1.6 .0004 .06 24699-M 45 .0000 2.7 .0003 .07 9= dam A= dam "a FWAA, KUWA U"A UAVIA KA Table A-3 Cont'd Ln s- u (1) 0 u 0) -C .- C c, 0 cn_ c 0 STATION ro Ln rd cn +-j cm IDENTIFICATION NUMBER CD 2-1 cl. C) L..) ZA '6-Q 'h-A 24681-M 28 .0011 2.2 .0003 .07 24682-M 29 .0013 1. 1, .0003 .05 24683-M 30 .0019 3.4 .0004 .06 24684-M '31 .0000 3.8 .0005 .07 24685-M 32 .0001 1.7 .0002 .06 24686-M 32-A .0000 3.5 .0008 .08 24687-M 33 .0000 0.4 .0001 .04 24688-M 34 oobo 4.3 .0006 .08 24689-M 35 .0000 1.4 .0002 .05 24690-M 36 .0004 2.7 .0005 .06 24691-M 37 .0000 2.7 .0007 .05 @24692-M 38 .0001 0.9 .0001 .04 24693-M 39 .0000 2.7 .0008 .06 24694-M 40 .0007 2.7 .0006 .06 24695-M 41 .0002 1.2 .0002 .04 24696-M 42 .0002 2.0 .0003 .05 24697-M 43 .0000 0.5 .0002 .02 24698-M 44 .0001 1.6 .0004 .06 24699-M 45 .0000 2.7 .0003 .07 iko" 6iwA Table A-3 Cont'd u (L) 0 cn JZ_ 0 (A. a 0 STATION to LA to -0 P_ 0 IDENTIFICATION o 0 _r_ NUMBER 0 >_ Ln CL C=) u '6-R 24700-M 46 ..0003 0.5 .0000 .03 24701-M 47 .0006 0.3 .0001 .02 24702-M 47-A .0003 0.2 .0000 .02 24703-M 48 .0012 0.2 .0000 .04 24704-M 49 .0004 0.5 .0001 .04 24705-M 50 .0005 0.2. .0001 .02 NOAA COASTAL SERVICES CTR LIBRARY 3 6668 14112917 3