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
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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
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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.
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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
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"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
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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
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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
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Figure 1-LOCATIONS OF WATER QUALITY SAMPLING STATIONS IN GEORGICA POND
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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.
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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
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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
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Figure 3-COMPARISON OF CHLORIDE VALUES IN GEORGICA POND DURING
MAY AND SEPTEMBER SURVEYS
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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
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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.
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Figure 5-TOTAL ORGANIC CARBON LEVELS IN GEORGICA POND DURING
MAY AND SEPTEMBER SURVEYS
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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.
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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.
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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
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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
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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
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10
z
QC
LU
0.
o
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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
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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
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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
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APPENDIX A
Water Quality Criteria
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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.)
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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.
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APPENDIX B
Water Quality Data
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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.
------- |