EA WATER Report on the Water Quality of Georgica Pond May 1S71 WATER QUALITY OFFICE ------- REPORT on the water quality of GEORGICA POND Suffolk County Long Island, N. Y. Environmental Protection Agency Water Quality Office Edison, New Jersey ------- TABLE OF CONTENTS Page SUMMARY AND CONCLUSIONS i PURPOSE OF REPORT 1 STUDY AREA 1 WATER USES AND CLASSIFICATION 2 WASTE SOURCES 3 WATER QUALITY 3 Temperature 4 Conductivity and Chlorides „ 5 Dissolved Oxygen 5 Total Organic Carbon 6 Nutrients 6 pH and Turbidity 7 Bacteria * 8 Station GP-3 8, BIOLOGICAL INVESTIGATIONS 9 APPENDICES Water Quality Criteria A Water Quality Data B Biological Investigation - May 26 - -September 25 .... C ------- SUMMARY AND CONCLUSIONS 1. With the exception of deep waters at its center, water quality in Georgica Pond meets State and Federal standards. This classifica- tion requires that the Pond be suitable for all water uses except body contact recreation and shellfishing for commercial purposes. 2. Freshwater runoff from the surrounding drainage area significantly influences water quality and the diversity and abundance of plant and animal populations. Water quality conditions become more marine approach- ing the seaward inlet. Runoff may contribute large amounts of mineral nutrients which stimulate growth of aquatic plants. Wide salinity varia- tions limit the diversity of the fish population. 3. The practice of periodically flushing the Pond by opening its seaward inlet maintains water quality and protects beneficial uses. During the period the inlet is closed, water quality deteriorates. Levels of organic and inorganic nutrients and coliform organisms increase, dis- solved oxygen concentrations decrease, and pond waters become progessively less saline. Marine organisms are eliminated. ------- PURPOSE OF REPORT As authorized by the River and Harbors Act of 1960 the U. S. Army Corps of Engineers proposes to construct a hurricane protection barrier at the seaward inlet of Georgica Pond, Suffolk County, Long Island. This barrier will include an interior drainage structure designed to maintain a 300 acre pond at elevation 5.0 feet above mean sea level (MSL). The structure will permit control of flow to or from the Atlantic Ocean. In accordance with Executive Order 11288 the Environmental Protec- tion Agency (previously the Federal Water Quality Administration) was requested to conduct water quality surveys to: (1) define water quality conditions before and after construction of the structure, and (2) eval- uate the effects of the proposed structure on water quality. This report presents the results of pre-construction surveys con- ducted during May and September 1969. A subsequent summary report will document post-construction water quality and evaluate the effects of the structure. STUDY AREA Georgica Pond is located on the south shore- of Long Island in Hampton and East Hampton Townships of Suffolk County, New York. The Pond, separated from the Atlantic Ocean by a natural sand barrier, is bounded by low banks and gently sloped shore. The seaward inlet, or ------- "gut", of the Pond is periodically opened to allow flushing and exchange of fresh and sea water. This flushing action maintains water quality and protects beneficial uses. The area immediately surrounding the Pond is privately owned and developed with summer homes. Georgica Pond watershed is approximately square and has a drainage area of 10.6 square miles. This drainage area includes farmland and light residential and industrial areas. Local climate is moderate. Annual temperature (recorded at Bridgehampton, New York by the U. S. Weather Bureau) averages 51 degrees Fahrenheit. Temperature extremes range from -12 to +100 degrees. Annual average precipitation is 46 inches. The average growing season is 180 days and relative humidity averages 70 percent. WATER USES AND CLASSIFICATION The Pond is used by local residents primarily for recreation. Major recreational uses include sailboating, private swimming, fishing, and shellfishing. Blue crabs, oysters, and soft clams have been taken in these waters. Alewives enter Georgica Pond when the inlet is opened in the spring and are said to spawn in the tributaries. Whitebait, largely silversides, are taken by local fishermen. Fyke nets are set in the fall and spring to harvest white perch and eels. The area is heavily utilized by migrating and wintering waterfowl including Canadian geese and several species of ducks. Other wildlife including ring-necked pheasant, bob-white quail, rabbit, fox, and raccoon, inhabit the area. 2 ------- The State of New York has classified Georgica Pond as "SC" water. This classification requires water quality suitable for fishing and all other uses except body contact recreation and shellfishing for commercial purposes. Water .Quality criteria required to meet this classification are summarized in Appendix A. These criteria and classification were approved by the Secretary of the Interior, and as authorized by the Water Quality Act of 1965, constitute Federal standards. WASTE SOURCES There are no direct waste discharges to Georgica Pond. Homes along the banks are served by individual septic tank systems. Surface runoff (estimated at 15 cfs) from the surrounding drainage area may contribute agricultural and natural pollutants. WATER QUALITY Surveys to define the water quality of Georgica Pond prior to con- struction were conducted on May 27 and September 3, 1969. The inlet to the ocean was opened and the Pond flushed with sea water on two oc- casions (March 12 and April 7) prior to the May survey. Since the inlet was opened only once (June 7), no significant flushing or exchange of ocean water occurred during.;the period between the surveys. Both rainfall (15 inches) and runoff were abnormally high between the May and September surveys. The water level in the Pond during each ------- survey approached the proposed post-construction elevation of 5.0 feet above mean sea level. As shown in Figure 1, nine locations were sampled during each survey. Table 1 includes detailed station descriptions. Parameters were selected to permit comparison of water quality . to the approved criteria and evaluation of the impact of potential increases in pollutional materials. Analyses at; each station included temperature, conductivity, chloride, dissolved oxygen, pH, turbidity, total Kjeldahl nitrogen, ammonia nitrogen, nitrate nitrogen, total organic carbon, total phosphate, total coliform, fecal coliform, and fecal streptococcus. Bottom type, and plant and animal identifications were made on May 27 and September 25. Temperature ,i Water temperature influences dissolved oxygen levels, survival and propagation of fish and other aquatic life, and rates of bio-chemical reactions and biological growth. Decreased dissolved oxygen levels are commonly associated with high temperatures. Figure 2 compares water temperatures for the surveys of May 26 and September 2. Temperature varied from 16.5 to 20.0°C (61.8-68.0 F) in May and from 18.5 to 25.5°C (65.3-78.0°F) in September. The warm summer climate and extended period of inlet closure caused September temperature to exceed the May maximum of 20.0 C at all but one station. The temperature data clearly indicate the effect of opening and closing the Pond inlet. During May (approximately 50 days after the most recent opening of the inlet) water temperature was uniform at all ------- Figure 1-LOCATIONS OF WATER QUALITY SAMPLING STATIONS IN GEORGICA POND ------- TABLE I GEORGICA POND WATER QUALITY SURVEY STATION LOCATIONS Station No. Description GP-1 Georgica Cove - north end. GP-2 Georgica Cove at inlet to Georgica Pond. GP-3S Opposite Trippe boat dock- offshore about 750 feet. Sample taken 5 feet from surface. GP-3D Opposite Trippe boat dock - offshore about 750 feet. Sample taken 40 feet from surface. GP-4 West Cove at Wainscott. GP-5 Georgica Pond - Center of lake about one mile north of inlet. GP-6 West arm about 150 feet from Highway 27 GP-7 Center arm about 200 feet from end. GP-8 East arm about 100 feet from end. GP-9 Georgica Pond - Center Lake about 1/2 mile from inlet. ------- MAY 26 16.5°C 20.0°C SEPTEMBER 3 18.5°C 25.5°C Figure 2-RANGE OF WATER TEMPERATURE IN GEORGICA POND DURING WATER QUALITY SURVEYS OF MAY 26 AND SEPTEMBER 3,1969 ------- stations. However, during September (when Pond waters had been con- fined for 87 days) temperature decreased approaching the seaward inlet. Conductivity and Chlorides The conductivity and chloride data showed trends similar to the temperature observations. During both surveys conductivity and chlorides increased approaching the seaward inlet. Average values of chlorides in May were twice those found in September. As shown in Figure 3, the chloride data reveal a condition not shown by the temperature observations the diluting effect of fresh- water runoff in the northern and eastern portions of the Pond. September values of chlorides at stations GP-7 and GP-8 were only 16 and 18 percent of averages for the remainder of the Pond. Dissolved Oxygen Adequate dissolved oxygen is necessary to support fish and other aquatic life. The amount of dissolved oxygen present will depend upon water temperature and salinity, the rate of oxygen transfer from the atmosphere, and the rate of both photosynthetic activity and bacterial stabilization of organic matter. When the rate of oxygen utilization by bacteria exceeds the rate of supply by photosynthesis and atmospheric reaeration, low dissolved oxygen levels and foul and obnoxious odors result. Figure 4 shows the dissolved oxygen level at each station for both surveys. With the exception of deep waters at station GP-3, oxygen levels were higher than the 5.0 mg/1 concentration established by the approved water quality standards. Warm September temperatures and the ------- Figure 3-COMPARISON OF CHLORIDE VALUES IN GEORGICA POND DURING MAY AND SEPTEMBER SURVEYS ------- 15 -| ~ 10- O) ^ z UJ O X O a ui > —t O VI — Q 5- STATION Figure 4-SURFACE DISSOLVED OXYGEN LEVELS IN GEORGICA POND DURING MAY AND SEPTEMBER SURVEYS ------- extended period of inlet closure reduced oxygen levels by more than 20 percent. Photosynthetic production of oxygen by algae caused super-saturation at nine stations in May and three in September. Bottom waters at station GP-3 were completely devoid of oxygen during both surveys. Total Organic Carbon Total organic carbon indicates the presence of organic material which may be degraded by oxygen-demanding bacteria and thus reduce oxygen concentrations below acceptable levels. Figure 5 compares total organic carbon levels during the May and September surveys. Mean total organic carbon levels in the main body of the Pond increased by 65 percent (from 9.0 to 14.8 mg/1) between May and September. This increase may have contributed to the reduced dissolved oxygen levels observed in September. The total organic carbon data also exhibits the effect of fresh water inflow at stations GP-6, GP-7, and GP-8. Nutrients Excess mineral nutrients stimulate over-abundant growth of aquatic plants. This profuse growth may become unsightly, cause odors, increase pH to intolerable levels, or cause erratic variation in dissolved oxygen levels. Although over 20 fertilizing elements are needed to support aquatic growth, phosphorous and nitrogen are believed the most critical. Natural runoff, transient waterfowl, decomposing plant material, bottom sediments, and agricultural land drainage represent potential sources of nitrogen and phosphorous to Georgica Pond. ------- Figure 5-TOTAL ORGANIC CARBON LEVELS IN GEORGICA POND DURING MAY AND SEPTEMBER SURVEYS ------- Extremely low concentrations of phosphate and nitrogen will support plant growth. In fresh waters phosphate levels as low as 0.01 - 0.04 mg/1 (0.003 - 0.012 mg/1 as P) have supported extensive growths of both suspended and attached algae. The critical nitrate concentration has been reported to be 0.3 mg/1 as N. The surveys indicate that Georgica Pond is rich in nitrogen and phosphorous and could support prolific algae growth. The super- saturated oxygen levels observed during both surveys indicate that extensive growth is already underway. Phosphate levels are at least 20 times the reported limiting levels. Although nitrate levels do not generally exceed 0.3 mg/1 a great reservoir of nitrogen is present as ammonia and organic material. During the period between the surveys phosphorous and nitrogen levels increased by 37 and 260 percent, respectively. Should the Pond remain confined, these levels would increase even further. pH and Turbidity The approved water quality standards establish no pH criteria for these waters. The National Technical Advisory Committee on Water Quality Criteria suggests that marine fish require a pH not less than 6.7 nor greater than 8.5 for survival and propagation. pH values during these surveys ranged from 6.6 to 9.3. Extensive plant growth caused a mean pH increase in the main Pond waters of nearly one unit during the summer. If the Pond were to remain confined, plant growths would increase and pH would rise even higher. ------- September turbidity readings exceeded May values at six of nine stations. The mean reading in September was 12.1; turbidity increased greatly at stations GP-1 and GP-2. Bacteria Coliform organisms indicate potential bacterial contamination. These organisms are found naturally in the wastes of warm-blooded animals and in soils. Total coliform counts during the May survey varied from 2 to 1100 organisms per 100 milliliters, whereas in September the counts varied from 2 to 18,000 organisms per 100 milliliters. Counts generally increased during the summer. Five stations exhibited counts greater than 1000 per 100 ml in September, whereas only one did so in May. The presence of fecal coliform organisms indicates recent contam- ination with feces of warm-blooded animals. During both surveys, fecal coliform counts (2 - 130 organisms/100 ml) were below the maximum level recommended for body contact recreation by the National Technical Advisory Committee on Water Quality Criteria. Waterfowl, wildlife, or scattered cattle or dairy herds observed in the area may account for the presence of the organisms. Fecal coliform counts did not change between the surveys. Station GP-3 Physical and water quality conditions in the deep waters at station GP-3 differed greatly from those in the remainder of the Pond. Here the water depth was 45 feet, compared to a depth of 2 - 15 feet at other stations. ------- During both surveys waters at station GP-3 were stratified. High conductivity and chloride values indicate that the bottom waters represent saline water which enters the Pond from the ocean when the inlet is opened. The saline bottom waters were not diluted by fresh water during the summer period of inlet closure. Surface and bottom water quality at station GP-3 are compared to water quality of the remainder of the Pond in Table II. The saline bottom waters were cold and contained much greater levels of inorganic nutrients than waters at the surface. During both surveys the bottom waters at station GP-3 were com- pletely devoid of oxygen and did not conform to the approved water quality standards. This was the only station at which such violation was observed. BIOLOGICAL INVESTIGATIONS Bottom type and plant and animal identifications were conducted on May 27 and September 25. Limited chemical and physical analyses were also conducted to verify the continued presence of conditions observed during the May and September water quality surveys. Bottom type and water chemistry data are summarized for both surveys in Table III; Figure 6 compares the number of fresh water and saline species found at each station. Fewer marine species were found in September. The bottom of Georgica Pond is generally composed of sand and mud with the varying presence of slight rock and gravel. In the deeper waters near the center of the Pond (stations GP-5, GP-9 and GP-3) the bottom was ------- TABLE II COMPARISON OF QUALITY OF BOTTOM WATERS AT STATION GP-3 TO QUALITY ELSEWHERE IN GEORGICA POND (September 3, 1969) Level-in Indicated Location Quality Parameter Temperature, °C PH Dissolved Oxygen, mg/1 Nitrate, mg/1 Salinity °/oo Chlorides, mg/1 Total Kjeldahl, mg/1 Total Phosphorous, mg/1 Bottom Waters at Station GP-3 6.9 7.1 zero zero 30.1 18900 5.2 3.8 Stations Surface Station 18.5 - 6.7 - 6.2 - 0.1 - 0.9 - 300.0 - 0.4 - 0.3 - 1,2,4-9 and Waters at GP-3 25.5 9.3 10.0 0.5 5.5 3220 4.0 0.9 ------- TABLE III WATER CHEMISTRY & BOTTOM TYPE COMPARISON BETWEEN 5-27-69 AND 9-25-69 SURVEYS GEORGICA POND GP-1 GP-2 GP-3 GP-4 GP-5 GP-6 GP-7 GP-8 GP-9 5-27-69 9-25-69 5-27-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 Bottom Type Gravel, Sand Sand- 90%, Mud- 10% Sand, Mud Mud-70%, Sand-30% Ooze- 9 8%, Sand- 2% Ooze- 100% Sand-50%, Mud-50% Sand-80%, Mud-20% Sand-50%, Mud-50% Ooze- 100% Sand-80%, Mud-20% Mud-50%, Sand-40% Gravel-10% Sand-50%, 'Mud-50% Sand -100% Gravel-80%, Sand-20% Sand-95%, Mud-5% Mud- 98%, Sand-2% Mud- 100% Depth 5' 3' 6' 6' 45' 38' 3' 3' 10' 6 ' 4' 3' 3' ?! 2' ..1.5'.. 10' 6' PH 8.2 "7.7 8.1 8.5 7.0 7.6 6.6 8.5 7.8 8.5 7.6 8.5 7.1 7.2 7.2 8.4 8.4 8.5 Sal. o/OO 7.3 4 7.4 4 29.5 32 6.1 3 7.3 3 6.2 2 5.3 1 5.4 * 1 7.5 4 Temp. °C 16.9 20 16.5 20 5.3 14 18.6 19 18.4 20 19.0 19 20.0 17 19.8 18 17.4 20 DO Percent mg/1 Saturation 9.9 8.6 9.6 8.2 0.0 0.0 9.9 6.9 10.8 10.0 10.5 5.5 10.3 8.3 10.7 8.9 11.0 10.2 109 97 106 93 00 00 112 75 121 112 119 59 118 86 123 93 122 115 ------- 10 z QC LU 0. o at UJ co s NO ORGANISMS FOUND T UJ ae 10 5 STATION Figure 6-COMPARISON OF MARINE AND FRESHWATER INVERTEBRATE SPECIES IN GEORGICA POND DURING MAY AND SEPTEMBER WATER QUALITY SURVEYS ------- predominately mud and ooze. During both surveys, the bottom ooze at station GP-3 released a strong hydrogen sulfide odor. During the September survey strong hydrogen sulfide odors were also noted in the benthos at stations GP-1, GP-2, GP-5, and GP-9. Aquatic plants grew abundantly throughout the study area. During May, pond weed (Potamogeton) and widgeon grass (Ruppia) were found in characteristic habitats. Pond weed was prevalent in the shallow inlets and widgeon grass grew luxuriously in the open water along the north- west shore. The presence of pond weed in the narrow inlets reflects the shallow depths and low salinities found in these areas. Along the shore cord grass (Spartina) and reed grass (Phragmites) were common. In September, pond weed remained the most common aquatic plant found in the Pond. The abundant growth of widgeon grass observed during the May survey was not present in September. Adverse water conditions and/or a natural growth cycle may be the cause of this decline. Cord and reed grasses continued to dominate along the shore. The number of invertebrate benthic species decreased 16 percent between the May and September surveys. As the salinity decreased marine species were eliminated; the number of fresh water species remained essentially constant. The decrease in benthic species was caused primarily by the elimination of crustaceans (Cumacea) and worms (Polychaeta), the two major marine groups found during the May survey. Amphipods, which have unknown salinity requirements, were also nearly eliminated. 10 ------- The limited fish population reflects the physical and water quality conditions observed. Only small fishes able to withstand appreciable salinity variations were found. Killifish (Fundulus), silversides (Menidia), flounder (Pseudopleuronectes), stickleback, small shrimp, and crabs were collected. The killifish was the dominant fish found in the Pond. Lack of accessibility may also reduce the number of fish species. Fish can only enter the Pond from the ocean during the short time the "gut" is opened and then must enter through the intertidal surf .zone along the beach. 11 ------- APPENDIX A Water Quality Criteria ------- APPENDIX A WATER QUALITY CRITERIA STATE OF NEW YORK CLASS SC DEFINITION OR BEST USAGE: Fishing and any other usages except bathing or shell- fishing for market purposes. FLOW CONDITIONS: 1 Floating None which are readily visible and attributable to sewage, Solids industrial wastes or other wastes or which deleteriously increase the amounts of these constituents in receiving waters after opportunity for reasonable dilution and mix- ture with the wastes discharged thereto. 2 Settleable Solids See Number 1. 3 Sludge Deposits 4 Solid Refuse,Gar- bage, Cinders, Ashes,Oils,Sludge or Other Refuse Garbage, Cinders, Ashes, Oils, Sludge or Other Refuse: None.in any waters of the "Marine District" as defined by State Conservation Law. (See Remarks) 5 Sewage or Other Effluent Not*~Sf>ec if ied. 6 Oil, Grease, Oil Slicks, or Scum Oil: See Number 13 7 Coliform Density Not Specified. 8 pH 10 Color Not Specified. 9 Dissolved Oxygen Not less than 5.0 ppm. See Number 13. 11 Turbidity Not Specified. 12 Taste, Odor Not Specified. 13 Toxic Wastes, Deleterious Substances; See over. Heated Effluents and Temperature Criteria: See over. REMARKS: "The Marine District shall include the waters of the Atlantic Ocean within three nautical miles from the coastline and all other tidal waters within the State except the Hudson River northerly of the south end of (Cont'd.) ------- APPENDIX A WATER QUALITY CRITERIA STATE OF NEW YORK CLASS SC .(-Cont'd.) 13 Toxic Wastes, Deleterious Substances: None alone or in combination with other substances or wastes in sufficient amounts or at such temperatures as to be injurious to edible fish or shellfish or the culture or propagation thereof, or which in any manner shall adversely affect the flavor, color, odor, or sanitary condition there- of or impair the waters for any other best usage as determined for the specific waters which are assigned to this class. Heated Effluents; See Number 13. (b) Temperature Criteria: Within the mixing zone, water temperature shall not exceed 90 F- Outside the mixing zone, water temperature shall not exceed 86 F after mixing; no permanent change in excess of ,5 .F° above normal will be permitted; discharges shall not raise monthly?means of maximum daily temperatures more than 4 F° from September through May, nor more than 1.5 F during June, July, and August-;' rate of temperature change shall be limited to 1 F° per hour, not to exceed '"'7 F° in any 24-hour period at maximum, except when natural phenomena cause these limits to be exceeded. REMARKS (Cont'd.): Manhattan Island." — from Paragraph 301, Part IX, New York State Fish and Game Law. ------- APPENDIX B Water Quality Data ------- GEORGICA POND SURVEY MAY 27. 1969 STATION DATE TIME GP-1 GP-2 GP-3 GP-3 GP-4 GP-5 GP-6 GP-7 GP-8 GP-9 05-27-69 0755 05-27-69 0840 05-27-69 0930 05-27-69 0900 05-27-69 1145 05-27-69 1115 05-27-69 1000 05-27-69 1030 05-27-69 1045 05-27-69 1215 STATION DATE TIME GP-1 GP-2 GP-3 GP-3 GP-4 GP-5 GP-6 GP-7 GP-8 GP-9 05-27-69 0755 05-27-69 0840 05-27-69 0930 05-27-69 0900 05-27-69 1145 05-27-69 1115 05-27-69 1000 05-27-69 1030 05-27-69 1045 05-27-69 1215 DEPTH FT 002 003 005 040 002 005 002 002 002 005 DEPTH FT 002 003 005 040 002 005 002 002 002 005 LAB NO. 00008 8004 8005 8007 8006 8014 8012 8009 8010 8011 8015 LAB NO. 00008 8004 8005 8007 8006 8014 8012 8009 8010 8011 8015 AIR TEMP CENT 00020 14.70 14.40 20.50 19.00 20.50 15.50 23.00 20.70 28.00 25.20 NH3-N MG/L 00610 0.05K 0.05K 0.05K 2.20 0.05K 0.05K 0.05K 0.05K 0.05K 0.05K WATER TEMP CENT 00010 16.90 16-.50 16.60 5.30 18.60 18.40 19.00 20.00 19.80 17.40 N03-N MG/L 00620 0.05K 0.05K 0.05K 0.05K 0.10 0.05K 0.10 0.10 0.10 0.05K DO MG/L 00300 9. 90 9.60 10.00 0.00 9.90 10.80 10.50 10.30 10.70 11.00 T KJL N MG/L 00625 1.10 0.80 0.70 2.20 0.70 0.60 0.70 0.90 0.80 0.80 DO 0/0 SAT 00301 106.00 102.30 107.30 N 108.70 119.30 116.70 116.20 120.10 119.20 T P04 P04 MG/L 00650 2.20 0.20 0.20 4.70 0.10 0.10 1.80 0.20 0.20 0.20 TURB JKSN JU 00070 2.80 1.00 0.90 6.70 2.00 1.70 2.00 0.90 1.70 2.50 T ORG C MG/L 00680 22.00 7.00 5.00 5.00 7.00 15.00 5.00 15.00 9.00 7.00 PH SU 00400 8.20 8.10 7.20 7.00 6.60 7.80 7.60 7.10 7.20 8.40 COLIF MFTC 100ML 31501 130 32 2 2 2 440 50 1100 2 80 COND A-25C UMHOS 00095 12200 12600 12600 44700 9900 12100 10600 9000 9400 12600 COLIF MFFC 100ML 31616 64 20 2 2 2 52 36 130 2 44 SALIN -ITY G/L 70305 7.30 7.40 7.50 29.50 6.10 7.30 6.20 5.30 5.40 7.50 FECAL STREP 100ML 31679 32 6 20 60 2 2 2 2 2 0 CL MG/L 00940 4400 4700 5100 18700 3400 4300 3700 320C 3100 4500 RENARKS- N-NO DATA AVAILABLE. J=ESTIMATED VALUE. K=LESS THAN. L=GREATER THAN. -=MINUS TEMP ------- GEORGICA POND SURVEY SEPTEMBER 3, 1969 STATI GP-1 GP-2 GP-3 GP-3 GP-4 GP-5 GP-6 GP-7 GP-8 GP-9 ON DATE 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 STATION DATE GP-1 GP-2 GP-3 GP-3 GP-4 GP-5 GP-6 GP-'7 GP-8 GP-9 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69 09-03-69- TIME 0250 C810 0850 0840 0950 1000 1015 1035 1105 0930 TIME 0250 0810 0850 0840 0950 1000 1015 1035 1105 0930 DEPTH FT 001 005 005 035 001 001 001 005 001 005 DEPTH FT 001 005 005 035 001 001 001 005 001 005 LAB NO. 00008 9401 9402 9404 9403 9406 9407 9408 9409 9410 9405 LAB NO. 00008 9401 9402 9404 9403 9406 9407 9408 9409 9410 9405 AIR TEMP CENT 00020 21.00 21.00 21.50 21.50 22-00 22.00 22.00 22.00 22.00 21.00 NH3-N MG/L 00610 0.10 0.10 0.10 3.80 0.10 0.05K 0. 10 0.10 0. 10 0.10 WATER TEMP CENT 00010 25.50 24.00 24.30 6.90 23.50 25.20 24.90 20.50 18.50 24.70 N03-N MG/L 00620 0.10 0.10 0.10 0.00 0.10 0.10 0.10 0.10 0.50 0.10 DO MG/L 00300 7.20 6.20 10.00 0.00 7.00 7.60 9.70 8.50 7.20 8.70 T KJL N MG/L 00625 4.00 3.60 2.80 5.20 1.30 2.10 1.20 0.40 0.70 2.10 DO 0/0 SAT 00301 89.30 75.40 122.80 N 83.60 94. 10 117.70 94.00 76.30 106.80 T P04 P04 MG/L 00650 0.90 0.80 0.70 3.80 0.50 0.60 0.40 0.30 0.30 0.50 TURB JKSN JU 00070 35.00 25.00 1.50 17.00 3.90 5.00 1.50 3.60 1.30 7.00 T ORG C MG/L 00680 31.00 20.00 14.00 4.00 6.00 9.00 6.00 2.00 2.00 12.00 PH SU 00400 8.40 8.60 9.30 7.10 8.70 8.80 7.70 7.10 6.70 9.30 COL IF MFTC 100ML 31501 2500 18 2 2 3300 48 2200 2100 94 18000 COND A-25C UMHOS 00095 8400 9300 9200 46800 7200 7900 6900 1600 1600 8600 COLIF MFFC 100ML 31616 44 12 2 2 4 2 110 74 2 50 SALIN -ITY G/L 70305 5.40 5.50 5.40 30.10 4.20 4.70 4.00 0.90 0.90 5.10 FECAL STREP 100ML 31679 8 2 2 2 8 2 30 64 62 56 CL MG/L 00940 2040 2870 3220 18900 1990 2470 960 300 330 2520 REMARKS- N=NO DATA AVAILABLE, J=ESTIMATED VALUE, K=LESS THAN, L=GREATER THAN, -=MINUS TEMP ------- APPENDIX C Biology Report May ------- TABLE I WATER CHEMISTRY & BOTTOM TYPE COMPARISON BETWEEN 5-27-69 and 9-25-69 RUNS GEORGICA POND Bottom Type Depth GP-1 GP-2 GP-3 GP-U GP-5 GP-6 GP-7 GP-8 GP-9 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 5-27-69 9-25-69 Gravel, Sand Sand-90$, Mud-10$ Sand, Mud Mud- 70$, Sand-30$ Ooze-98$, Sand 2% Ooze -100$ Sand- 50$, Mud-50$ Sand- 80$, Mud- 20$ • Sand-50$, Mud-50$ Ooze-100$ Sand- 80$, Mud- 20$ Mud-50$, Sand-U0$ Gravel-10$ Sand-50$, Mud-50$ Sand-100$ Gravel-80$, Sand-20$ Sand-95$, Mud-5$ Mud-98$, Sand-2$ Mud-100$ 5' 3' 6' 6' US' 38' 3' 3' 10' 6' k< 3' 31 2' 2' 1.5' 10' 6' PH 8.2 7.7 8.1 8.5 7.0 7.6 6.6 8.5 7.8 8.5 7.6 8.5 7.1 7.2 7.2 8.U 8.U 8.5 Sal. °/00 7.3 U l.h h 29.5 32 6.1 3 7.3 3 6.2 2 5-3 1 5.U i 7.5 h Temp. °C 16.9 20 16.5 20 5.3 1U 18.6 19 18. U 20 19.0 19 20.0 17 19.8 18 17. U 20 DO Percent mg/1 Saturation 9.9 8.6 9.6 8.2 0.0 0.0 9.9 6.9 10.8 10.0 10.5 5.5 10.3 8.3 10.7 8.9 11.0 10.2 109 97 106 93 00 00 112 75 121 112 119 59 118 86 123 93 122 115 ------- TABLE 2 GEORGICA POND SPECIES COMPOSITION COMPARISON May 27, 1969 GP-1 DOMINANT SPECIES #*HAmphipoda - "Scud" •sfChironomidae - "Midge" - Larva Oligochaeta - "Aquatic Worm" Gastropoda - "Snail" •JiBulimidae SUPPORT SPECIES Crustacea •K-aPalaemonetes vulgaris - "Shrimp" •frtfCumacea •JHtPolychaeta AQUATIC PLANTS Potamogeton - "Pond Weed" Ruppia - "Widgeon Grass" Gre.en Filamentous Algae GP-2 DOMINANT SPECIES -SHBfAmphipoda •SBBdsopoda Polychaeta •JHiHypaniola Grayi ' September 25, 1969 DOMINANT SPECIES Polychaeta •JHi-Hypaniola Grayi Gastropoda SUPPORT SPECIES Polychaeta •JBsNereis -x-xUnknown -x-Chironomidae - Larva -KOdonata - "Damsel Fly"-Nymph •JBH&mphipoda AQUATIC PLANTS Potamogeton REMARKS: Potamogeton on water surface, strong !L;,S odor in bottom. DOMINANT SPECIES •isChironomidae - Larva Gastropoda -*?Amnicola •JHtUnknown Tube Dweller ------- -2- GEORGICA POND SPECIES COMPOSITION COMPARISON (Cont'd) May 27, 1969 SUPPORT SPECIES •SBSCumacea Pelecypoda •*Tellina Agilis GP-2 (Cont'd) September 25, 1969 SUPPORT SPECIES •KChironomidae - Pupa Polychaeta •frKHypaniola Grayi AQUATIC PLANTS Ruppia Potamogeton Phragmites - "Reed Grass1 GP-3 DOMINANT SPECIES "NONE" SUPPORT SPECIES Pelecypoda #Tellina Agilis (empty shell) AQUATIC PLANTS Filamentous Green Algae Unknown Grass REMARKS: Strong H2S odor in bottom, several un- identified seeds in bottom sample. DOMINANT SPECIES "NONE" SUPPORT SPECIES Gastropoda *Amnicola (empty shell) AQUATIC PLANTS "NONE AQUATIC PLANTS Filamentous Green Algae REMARKS; Strong H2S odor in bottom. REMARKS; Strong H2S odor in bottom. ------- -3- GEORGIGA POND SPECIES COMPOSITION COMPARISON (Cont'd) May'27, 1969 DOMINANT SPECIES •JHB&mphipoda Polychaeta •x-x-Hypaniola Grayi ^-^Unidentified SUPPORT SPECIES tfChironomidae - Larva AQUATIC PLANTS Potamogeton GP-U September 2g, 1969 DOMINANT SPECIES •>BB$Amphipoda Polychaeta Grayi •HChironomidae - Larva •«01igochaeta Gastropoda •HAmnicola (5>0$ alive) SUPPORT SPECIES Pelecypoda -"Beetle" - Larva #Trichoptera -"Caddis Fly" - Pupa Coleoptera •«Berosus AQUATIC PLANTS Vallisneria -"Eel Grass" Potamogeton REMARKS: Heavy Plant Cover on Bottom. DOMINANT SPECIES -SBBt-Amphipoda Polychaeta •SHiflypaniola Grayi SUPPORT SPECIES •JfChironomidae - Larva AQUATIC PLANTS Ruppia DOMINANT SPECIES Gastropoda ^Amnicola - (mostly empty shells) •ifChironomidae - Larva SUPPORT SPECIES •BChironomidae - Pupa AQUATIC PLANTS "NONE REMARKS: Strong I^S odor in bottom. ------- -u- GEORGICA POND SPECIES COMPOSITION COMPARISON (Cont'd) May 21, 1969 DOMINANT SPECIES •JHHiAmphipoda -x-iBftsopoda Gastropoda •xMusculium SUPPORT SPECIES -x-Chironomidae Coleoptera •x-Berosus -Unknown -x-x-Cumacea Neuroptera -x-Sialis Polychaeta -x-x-Hypaniola Grayi -xOligochaeta AQUATIC PLANTS Ruppia GP-6 - Larva & Pupa -Fish Fly" -Larva September 2$, 1969 DOMINANT SPECIES Gastropoda * Amnicola SUPPORT SPECIES •HOligochaeta •tfChironomidae - Larva Coleoptera aHaliplus - Larva AQUATIC PLANTS Potamogeton DOMINANT SPECIES #01igochaeta Gastropoda -HBulimidae SUPPORT SPECIES •iHHsAmphipoda Coleoptera •HHydrophilidae - Larva •3«H«Isopoda •J«Hirudinea - "Leech" *x«Chironomidae - Pupa GP-7 REMARKS: Slight H2S odor in bottom. DOMINANT SPECIES Gastropoda •^Amnicola -*01igochaeta SUPPORT SPECIES Polychaeta »%Hypaniola Grayi Pelecypoda ^lusculium ------- -5- GEORGICA POND SPECIES CCMPOSITION COMPARISON (Cont'd) May 21, 1969 September 25, 1969 GP-7 (Cont'd) AQUATIC PLANTS Potamogeton Ruppia Polygonum - "Smart Weed" Filamentous Green Algae Niasses of Sphaerotalis - Like Material GP-8 DOMINANT SPECIES •KOligochaeta Gastropoda -ssBulimidae SUPPORT SPECIES •HChironomidae - Larva •iHHiAmphipoda Neuroptera -frSialidae Pelecypoda -a-Tellina Polychaeta •JHtflypaniola grayi AQUATIC PLANTS Nymphaea Unknown higher aquatic plants AQUATIC PLANTS Potamogeton Filamentous Green Algae REMARKS; Heavy plant cover on bottom, gas bubbles in water. DOMINANT SPECIES Gastropoda •aAmnicola #01igochaeta SUPPORT SPECIES Pelecypoda •ffilusculium Gastropoda -sPhysa Polychaeta •JHsHypaniola grayi #Chironomidae - Larva Coleoptera •BBerosus - Larva *Haliplus - Larva Neuroptera ^•Sialis - Larva AQUATIC PLANTS Nymphaea Fotamogeton Unidentified Grass REMARKS: Light green or milky colored material covered water surface (appears in suspension), if moved aside secci reading doubles (0.6'-1.U') ------- -6- GEORGICA POND SPECIES COMPOSITION COMPARISON (Cont'd) May 27, 1969 DOMINANT SPECIES •sfChironomidae - Larva Gastropoda -x-Bulitnidae SUPPORT SPECIES Polychaeta -x-^Ampharetidae -x-x-Cumacea GP-9 September 2g, 1969 DOMINANT SPECIES Gastropoda -:&mnicola (empty shells) SUPPORT SPECIES -x~x-X:Amphi p oda Polychaeta •JHt-Spiopanes bombyx AQUATIC PLANTS Ruppia AQUATIC PLANTS Potamogeton -x- - Fresh Water *-* - Marine -;;-;Bf - Not determined REMARKS; Seeds, common on bottom, strong H2S odor in bottom. ------- |