U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
BANTAM LAKE
LITCHFIELD COUNTY
CONNECTICUT
EPA REGION I
WORKING PAPER No, 177
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
tfGPO 697-032
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REPORT
ON
BANTAM LAKE
LITCHFIELD COUN1Y
CONNECTICUT
EPA REGION I
WORKING PAPER No, 177
WITH THE COOPERATION OF THE
CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION
AND THE
CONNECTICUT NATIONAL GUARD
JANUARY, 1975
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CONTENTS
Page
Foreword ° ii
List of Connecticut Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Introduction 4
III. Lake and Drainage Basin Characteristics 5
IV. Lake Water Quality Summary 6
V. Nutrient Loadings 11
VI. Literature Reviewed 16
VII. Appendices 17
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to fresh water lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)], water
quality criteria/standards review [§303(c)], clean lakes [§314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
-------
111
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
ACKNOWLEDGMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Connecticut Department of
Environmental Protection for professional involvement and to
the Connecticut National Guard for conducting the tributary
sampling phase of the Survey.
John J. Curry, Director of the former Water Resources Commission;
Roy B. Anderson, Principal Sanitary Engineer, and Steven Gerdsmeier,
Sanitary Engineer, of the Water Compliance Unit, Department of Environ-
mental Protection; and Sam Suffern, Assistant Director of Water and
Related Resources, Department of Environmental Protection, provided
invaluable lake documentation and counsel during the course of the
Survey.
Major General John F. Freund, the Adjutant General of Connecticut,
and Project Officer Lieutenant Colonel Daniel M. McGuire, who directed
the volunteer efforts of the Connecticut National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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IV
LAKE NAME
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF CONNECTICUT
Aspinook Pond
Bantam
Communi ty
Eagleville
Hanover Pond
Housatonic Impoundments:
Housatonic
Lillinonah
Zoar
COUNTY
New London, Windham
Litchfield
New Haven
To!land
New Haven
Fairfield, New Haven
Fairfield, Litchfield,
New Haven
Fairfield, New Haven
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Bantam
Lake
BANTAM LAKE
X Lake Sampling Site
Tributary Sampling Site
Sewage Treatment Facility
,/* Direct Drainage Area Boundary
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BANTAM LAKE
STORE! NO. 0902
I. CONCLUSIONS
A. Trophic Condition:
Bantam Lake is eutrophic. Algal blooms are frequent,
and growths of rooted emergent aquatic vegetation are heavy.
Anaerobic conditions were present during summer stratification.
B. Rate-Limiting Nutrient:
The algal assay results show that nitrogen was the limit-
ing nutrient at the time the fall sample was collected. The
lake data indicate nitrogen limitation at the other sampling
times as well.
C. Nutrient Controllability:
1. .Point sources--During the sampling year, Bantam Lake
received a total phosphorus load at a rate less than that
proposed by Vollenweider (in press) as "dangerous" but more
than his "permissible" rate; i.e., a mesotrophic rate (see
page 15). It is calculated that the two point sources in-
cluded in this study contributed only 8% of the total load,
and it is concluded that phosphorus control at these sources
would not significantly improve the trophic condition of the
lake.
Note that nutrient "wash-out" occurred during the sampling
year; that is, more nutrients were measured leaving the lake
-------
than were measured entering the lake (see pages 13 and 14).
The wash-out may have been due only to Insufficient sampling
or to unknown and unmeasured nutrient sources discharging
directly to the lake (e.g., shoreline septic tanks). However,
if nutrient wash-out actually occurred, the most likely cause
would be the elimination of a nutrient source prior to the
beginning of the Survey.
Now, for many years, the old Litchfield wastewater treat-
ment plant effluent was discharged to groundwater via a series
of filter (seepage) beds which were located near the Bantam
River a short distance above Bantam Lake. In November, 1971,
the old plant was replaced by a new plant which discharges to
the Bantam River below the lake; Survey tributary and waste
treatment plant sampling began in August of 1972.
In an earlier study, Frink (1967) concluded that the old
Litchfield waste treatment plant did not impact Bantam Lake
since samples of the Bantam River above and below the plant
site did not reveal significant differences in nutrient con-
centrations. However, he did not assess the impact of the
treatment plant on the level of nutrients in the groundwater
or groundwater contribution of nutrients to the lake, although
he noted that the upper centimeter of the lake bottom sediments
contained at least 10 times his estimated annual input of nitrogen
-------
and phosphorus (sedimentation was estimated at 0.4 centimeters
per year; i.e., the upper centimeter would have been deposited
in 2% years, indicating that on an annual basis, about 4 times
more nitrogen and phosphorus were sedimented than could be
accounted for by his estimated annual inputs).
In view of the proximity of the old plant to the Bantam
River, the nutrient wash-out noted above, and the existing
mesotrophic loading rate, it seems likely that the effluent
from the old Litchfield plant did, in fact, impact Bantam
Lake during the operational period of the plant. If this was
the case, the trophic condition of Bantam Lake should improve
once a new nutrient equilibrium is established. However, rooted
aquatic vegetation is likely to continue to be a problem for some
time because of the alternate source of nutrients from the sedi-
ments .
2. Non-point sources (see page 14)--The phosphorus export
of the Bantam River appears to have been somewhat high during
the sampling year but was less than the watershed export of 146
p
Ibs/mi /yr estimated by Frink (op. cit.). The phosphorus export,
in part, may have been due to continuing contributions from the
previous groundwater discharge of the old Litchfield wastewater
treatment plant.
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II. INTRODUCTION
Bantam Lake Is a relatively shallow natural lake located in the
townships of Litchfield and Morris in northwestern Connecticut. The
lake is separated into North Bay, South Bay, and a larger central
portion connecting the two. The natural lake level has been raised
by a low dam in the village of Bantam. Although the inlet and outlet
are both located in the northern portion of the lake, extensive mix-
ing with the rest of the lake has been reported (Frink, 1967).
The watershed is largely composed of forested, agricultural, and
abandoned agricultural lands. This rural watershed has a population
of approximately 10,000 people. The shoreline is largely developed;
and cottages are numerous.
Lake use is largely recreational. Bantam Lake is considered an
above-average fishery for white perch, yellow perch, and largemouth
bass (Anonymous, 1959).
Deep deposits of highly organic sediments have accumulated over
many years; the heavy growths of algae and submerged and emergent
aquatic vegetation likely are contributing to the ooze accumulation.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry :
1. Surface area: 916 acres.
2. Mean depth: 14.3 feet.
3. Maximum depth: 25 feet.
4. Volume: 13,099 acre-feet.
5. Mean hydraulic retention time: 112 days.
B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries -
Name Drainage area* Mean flow*
2
Bantam River 27.8 mi 48.9 cfs
Minor tributaries & 2
immediate drainage - 4.0 mi 9.8 cfs
Totals 31.8 mi2 58.7 cfs
2. Outlet -
Bantam River 33.2 mi2** 58.7 cfs
C. Precipitation***:
1. Year of sampling: 60.6 inches.
2. Mean annual: 44.8 inches.
t Anonymous, 1972.
* Drainage areas are accurate within ±1%; gaged mean daily and mean monthly
flows are accurate within ±10%; ungaged mean daily and mean monthly flows
are accurate within ±20%; and normalized mean monthly flows are accurate
within ±10% for gaged streams and within ±12% (high flow) to 27% (low flow)
for ungaged streams.
** Includes area of lake.
*** See Working Paper No. 1, "Survey Methods1'.
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IV. LAKE WATER QUALITY SUMMARY
By means of a pontoon-equipped Huey helicopter, Bantam Lake was sampled
three times at station 1 and two times at station 2 during the open-water
season of 1972. Each time, samples for physical and chemical parameters were
collected from a number of depths at each station (see map, page v). During
each visit, a single depth-integrated (15 feet or near bottom to surface)
sample was composited from the stations for phytoplankton identification and
enumeration; and during the last visit, a single five-gallon depth-integrated
sample was composited for algal assays. Also each time, a depth-integrated
sample was collected from each of the stations for chlorophyll a. analysis.
The maximum depths sampled were 21 feet at station 1 and 10 feet at station 2.
The results obtained are presented in full in Appendix B, and the data
for the fall sampling period, when the lake essentially was well-mixed, are
summarized below. Note, however, the Secchi disc summary is based on all
values.
For differences in the various parameters at the other sampling times,
refer to Appendix B.
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A. Physical and chemical characteristics:
Parameter Minimum
Temperature (Cent.) 16.1
Dissolved oxygen (mg/1) 7.9
Conductivity (ymhos) 120
pH (units) 7.9
Alkalinity (mg/1) 30
Total P (mg/1) 0.044
Dissolved P (mg/1) 0.017
N0? + N03 (mg/1) 0.030
Ammonia fmg/1) 0.040
FALL VALUES
(10/04/72)
Mean Median
Maximum
16.4
8.8
120
8.4
32
0.052
0.018
0.030
0.055
16.4
8.8
120
8.5
33
0.048
0.017
0.030
0.055
16.7
9.6
120
8.8
33
0.067
0.019
0.030
0.070
ALL VALUES
Secchi disc (inches) 36
65
45
132
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8
B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
05/29/72
08/01/72
10/04/72
Dominant
Genera
1. Asterionella
2. Dinobryon
3. Fragilaria
4. Anabaena
5. Melosira
Other genera
Total
1. Oscillatoria
2. Dinobryon
3. Schroederia
4. Gloeocapsa
5. Chroococcus
Other genera
Total
1. Coelosphaerium
2. Flagellates
3. Polycystis
4. Synedra
5. Melosira
Other genera
Number
per ml
1,092
1,019
195
72
29
124
2,531
8,675
3,825
210
180
136
120
499
Total
4,970
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2. Chlorophyll a_ -
(Because of instrumentation problems during the 1972 sampling,
the following values may be in error by plus or minus 20 percent.)
Sampling Station Chlorophyll a_
Date Number (ug/1)
05/29/72 01 9.5
08/01/72 01 37.3
02 8.2
10/04/72 01 53.0
02 47.9
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N Maximum yield
Spike (mg/1) Cone, (mg/1) Cone, (mg/1) (mg/1-dry wt.)
Control
0.006 P
0.012 P
0.024 P
0.060 P
0.060 P + 10.0 N
10.0 N
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
of Bantam Lake was moderately high in October, 1972, when
the sample was collected. Also, the lack of growth response
to increased levels of orthophosphorus, until nitrogen was
. also added, indicates the lake was nitrogen limited at that
time. Note the increase in yield when only nitrogen was added.
0.034
0.040
0.046
0.058
0.094
0.094
0.034
0.031
0.031
0.031
0.031
0.031
10.031
10.031
4.2
4.3
5.5
3.6
4.2
43.2
13.4
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10
The lake data indicate nitrogen limitation at the other
sampling times as well; i.e., N/P ratios were about 6/1, and
nitrogen limitation would be expected.
D. Trophic Condition:
Bantam Lake is eutrophic. Survey limnologists noted algal
blooms in progress in August and October of 1972, and dissolved
oxygen was depleted in the hypolimnion in August. Rooted aquatic
weeds cover about 25% of the lake area (Ketelle and Uttormark,
1971).
Bantam Lake has been cited by Frink (1967) as a classic exam-
ple of natural eutrophication, but Survey data indicate possible
point-source influence.
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11
IV. NUTRIENT LOADINGS
(See Appendix C for data)
For the determination of nutrient loadings, the Connecticut National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v), except for the high run-
off month of March when two samples were collected. Sampling was begun
in August, 1972, and was completed in September, 1973.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Connecticut District Office of the U.S. Geological Survey for the
tributary sites nearest the lake.
In this report, nutrient loads for sampled tributaries were deter-
mined by using a modification of a U.S. Geological Survey computer
program for calculating stream loadings*. Nutrient loadings for unsam-
0
pled "minor tributaries and immediate drainage" ("ZZ" of U.S.G.S.) were
estimated by using the mean annual concentrations in Whittlesey Brook
at station B-l and the mean annual ZZ flow.
The operator of the Connecticut Junior Republic Association wastewater
treatment plant provided monthly effluent samples and corresponding flow
data. However, the Goshen School treatment plant was not sampled; and,
because of similarity of flow and treatment type, the nutrient loads were
estimated to be the same as the CT Junior Republic.loads.
* See Working Paper No. 1.
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12
The nutrient loads attributed to the Bantam River are those measured
at station A-2 minus the measured and estimated point-source loads.
For many years, the old Litchfield municipal waste treatment plant
discharged effluent to ground waters near the Bamtam River upstream from
Bantam Lake; this plant was abandoned in late 1971, prior to the begin-
ning of the Survey, but may have impacted the lake during the sampling
year (see page 2).
A. Waste Sources:
1. Known muncipal -
Name
CT Junior
Republic
Assoc.*
Goshen School** -
2. Known industrial - None
Pop.
Served
100
—
Treatment
sand filter
sand filter
Mean Flow
(m3/d)
0.010
0.012
Receiving
Water
W. Br.,
Bantam River
Mountain Broi
* Reynolds, 1973.
** Gerdsmeier, 1974.
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13
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
Ibs P/ % of
Source . r total
a. Tributaries (non-point load) -
Bantam River 3,110 60.7
b. Minor tributaries & immediate
drainage (non-point load) - 1 »450 28.4
c. Known municipal -
CT Junior Republic 210 4.1
Goshen School 210 4.1
d. Septic tanks - Unknown
e. Known industrial - None
f. Direct precipitation* - 140 2.7
Total 5,120 100.0
2. Outputs -
Lake outlet - Bantam River 5,360
3. Net annual P loss - 240 pounds
* See Working Paper No. 1.
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14
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
Ibs N/ % of
Source y_r total
a. Tributaries (non-point load) -
Bantam River 68,580 69.0
b. Minor tributaries & immediate
drainage (non-point load) - 20,860 21.0
c. Known municipal -
CT Junior Republic 590 0.6
Goshen School 590 0.6
d. Septic tanks - Unknown
e. Known industrial - None
f. Direct precipitation* - 8.820 8.8
Total 99,440 100.0
2. Outputs -
Lake outlet - Bantam River 105,680
3. Net annual N loss - 6,240 pounds
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary Ibs P/mi2/yr Ibs N/mi2/yr
Bantam River 112 2,467
* See Working Paper No. 1.
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15
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those proposed by Vollenweider (in press).
Essentially, his "dangerous" rate is the rate at which the
receiving water would become eutrophic or remain eutrophic;
his "permissible" rate is that which would result in the
receiving water remaining oligotrophic or becoming oligotrophic
if morphometry permitted. A mesotrophic rate would be consid-
ered one between "dangerous" and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with very short detention times.
Units
Total Phosphorus
Total Nitrogen
Total Accumulated Total Accumulated
Ibs/acre/yr
grams/nr/yr
5.6
0.63
loss1
108.6
12.2
loss*
Vollenweider loading rates for phosphorus
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Bantam Lake:
"Dangerous" (eutrophic rate) 1.20
"Permissible" (oligotrophic rate) 0.60
* See page 2.
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16
V. LITERATURE REVIEWED
Anonymous, 1959. A fishery survey of the lakes and ponds of Connecticut.
Rept. No. 1, CT Bd. of Fish. & Game, Hartford.
Anonymous, 1972. Survey questionnaire. CT Dept. of Env. Prot., Harford.
Frink, Charles R., 1967. Nutrient budget: rational analysis of eutro-
phication. Env. Sci. & Techn. 1:425-428.
_, 1970. Nutrient budgets in reservoirs. Proc. NE Weed
Contr. Conf. 24:284-285.
Gerdsmeier, Steven, 1974. Personal communication (Goshen School waste
treatment; Litchfield waste treatment and possible impact on Bantam
Lake). CT Dept. of Env. Prot., Hartford.
Ketelle, Martha J., and Paul D. Uttormark, 1971. Problem lakes in the
United States. EPA Water Poll. Contr. Series, Proj. 16010 EHR.
Legendre, Theodore, 1974. Personal communication (new Litchfield waste
treatment facilities). Town of Litchfield Sewer Comm., Litchfield.
Norvell, W. A., 1972. Exchange of phosphate between sediment and water
in three Connecticut lakes. Soil Sci. Soc. Amer. Proc. 26:173-175.
Reynolds, Kenneth, 1973. Personal communication (waste treatment
facilities). CT Junior Republic Assoc., Litchfield.
Vollenweider, Richard A. (in press). Input-output models. Schweiz.
Z. Hydrol.
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17
VII. APPENDICES
APPENDIX A
TRIBUTARY FLOW DATA
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TRIBUTARY FLOW INFORMATION FOR CONNECTICUT
11/26/74
LAKE CODE 0902
BANTAM LAKE
TOTAL DRAINAGE AREA OF LAKE
33.?0
SUB-DRAINAGE
TRIBUTARY AREA
0902A1
0902A2
0902ZZ
33.20
27.80
5.40
JAN
71.00
59.00
12.00
FEB
75.00
62.00
13.00
MAR
124.00
103.00
21.00
APR
117.00
98.00
19.00
MAY
69.00
58.00
11.00
NORMALIZED FLOWS
JUN JUL AUG
0902A1
0902A2
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
8
9
10
11
1?
1
2
3
4
5
6
7
8
9
10
72
72
72
72
72
73
73
73
73
73
73
73
73
73
73
72
72
72
72
72
73
73
73
73
73
73
73
73
73
73
20.00
9.40
19.00
88.00
126.00
104.00
98.00
96.00
100.00
54.00
39.00
72.00
17.00
13.00
13.00
17.00
8.00
16.00
74.00
124.00
97.00
96.00
94.00
98.00
53.00
38.00
60.00
14.00
11.00
11.00
19
16
14
26
21
17
23
10
21
18
15
12
19
16
14
26
21
17
23
10
21
18
15
12
31.20
26.00
5.20
19.80
17.00
2.60
23.90
20.00
3.90
SEP
23.40
20.00
3.40
OCT
30.10
25.00
5.10
NOV
56.00
46.00
10.00
DEC
MEAN
65.00 58.67
54.00 48.91
11.00 9.76
16.00
12.00
14.00
101.00
54.00
118.00
52.00
51.00
37.00
32.00
13.00
7.50
13.00
9.90
12.00
99.00
53.00
116.00
51.00
50.00
36.00
27.00
11.00
6.30
SUMMARY
33.20
33.20
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SUB-DRAINAGE AREAS =
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY
TOTAL FLOW IN
TOTAL FLOW OUT
705.40
705.40
FLOW DAY
FLOW
30
76.00
30
75.00
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TRIBUTARY FLOW INFORMATION FOR CONNECTICUT
11/26/74
LAKE CODE 090?
BANTAM LAKE
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY
0902ZZ
8
9
10
11
12
I
2
3
4
5
6
7
8
9
10
72
72
72
72
72
73
73
73
73
73
73
73
73
73
73
3.30
1.40
3.30
14.00
2.50
17.00
1.90
1.80
2.00
1.00
0.70
12.00
2.70
2.10
2.10
19
16
14
26
21
17
23
10
21
18
15
12
FLOW DAY
2.50
1.70
2.40
2.00
1.00
2.30
1.00
1.00
0.70
5.20
2.10
1.20
FLOW DAY
FLOW
30
1.50
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APPENDIX B
PHYSICAL and CHEMICAL DATA
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STORET RETRIEVAL DATE 74/11/26
090301
41 42 00.0 073 13 30.0
BANTAN LAKE
09 CONNECTICUT
00010
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
72/05/29 19 30 0000 18.0
19 30 0009 15.3
72/08/01 11 30 0000
11 30 0004 23.4
11 30 0010 22.9
11 30 0015 19.5
11 30 0021 18.1
72/10/04 12 40 0000
12 40 0004 16.7
12 40 0015 16.5
00300 00077 00094
DO TRANSP CNOUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
9.2
6.6
7.0
5.8
0.0
0.0
7.9
8.6
132
51
36
110
260
110
100
105
110
110
120
120
120
11EPALES
4
00400
PH
SU
6.90
6.60
7.00
6.80
6.80
6.50
6.40
8.45
8.00
7.95
00410
T ALK
CAC03
MG/L
24
24
32
32
32
36
38
32
33
33
2111202
0024
00630
N02&N03
N-TOTAL
MG/L
0.020
0.040
0.070
0.060
0.050
0.040
0.070
0.030
0.030
0.030
FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.020
0.040
0.130
0.110
0.120
0.370
0.830
0.060
0.050
0.040
00665
PHOS-TOT
MG/L P
0.043
0.024
0.030
0.030
0.032
0.168
0.479
0.055
0.047
0.049
00666
PHOS-DIS
MG/L P
0.010
0.011
0.010
0.009
0.011
0.127
0.199
0.018
0.010
0.017
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/05/29 19 30 0000 9.5J
72/08/01 11 30 0000 37.3J
72/10/04 12 40 0000 53.OJ
J VALUE KNOWN TO BE IN ERROR
-------
STORET RETRIEVAL DATE 74/11/36
090208
41 41 44.0 073 13 45.0
BANTAM LAKE
09 CONNECTICUT
DATE TIME DEPTH
FROM OF
TO DAY FEET
72/08/01
72/10/04
12 00 0000
12 00 0004
12 00 0010
12 25 0000
12 25 0004
12 ?5 0008
00010
WATER
TEMP
CENT
23.2
22.9
16.2
16.1
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
7.2
6.2
9.6
9.0
39
105
105
105
120
120
120
11EPALES
3
00400
PH
SU
7.00
6.90
6.80
8.75
8.65
8.60
00410
T ALK
CAC03
MG/L
35
34
33
33
31
30
2111202
0014
00630
N02&N03
N-TOTAL
MG/L
0.060
0.060
0.060
0.030
0.030
0.030
FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.130
0.120
0.140
0.050
0.070
0.060
00665
PHOS-TOT
MG/L P
0.037
0.037
0.045
0.048
0.044
0.067
00666
PHOS-OIS
MG/L P
0.009
0.011
0.010
0.017
0.017
0.019
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/08/01 12 00 0000
72/10/04 12 25 0000
8.2J
47.9J
J VALUE KNOWN TO BE IN ERROR
-------
APPENDIX C
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 74/11/26
0902A1 LS0902A1
41 43 00.0 073 13 30.0
BANTAM RIVER
09011 7.5 LITCHFIELD
0/8ANTAM LAKE
NORTH SHORE RO BRDG
11EPALES 2111204
4 0000 FEET
DATE
FROM
TO
72/08/19
72/09/16
72/10/14
72/11/11
72/12/26
73/02/21
73/03/17
73/03/30
73/04/23
73/06/21
73/07/18
73/08/15
73/09/12
TIME DEPTH
OF
DAY FEET
11 30
11 35
10 30
09 05
14 20
14 25
10 15
11 00
16 08
10 10
11 25
10 30
13 15
00630
N02&N03
N-TOTAL
MG/L
0.050
0.052
0.060
0.055
0.360
0.180
0.220
0.150
0.014
0.013
0.056
0.094
0.100
00625
TOT KJEL
N
MG/L
1.100
1.100
0.950
0.575
0.340
0.370
0.360
0.520
0.220
2.900
1.200
0.480
0.660
00610
NH3-N
TOTAL
MG/L
0.120
0.048
0.092
0.060
0.044
0.018
0.027
0.007
0.012
0.084
0.082
0.072
0.032
00671
PhOS-DIS
ORTHO
MG/L P
0.016
0.016
0.013
0.012
0.007
0.005K
0.011
0.005K
0.005K
0.012
0.026
0.025
0.027
00665
PHOS-TOT
MG/L P
0.048
0.082
0.077
0.024
0.020
0.030
0.020
0.030
0.025
0.030
0.075
0.080
0.090
DEPTH
K VALUE KMOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 74/11/26
0902A2 LS0902A2
41 43 30.0 073 12 30.0
BANTAM RIVER
09 7.5 LITCHFIELD
I/HANTAM LAKE
WERSTER RD BROG
11EPALES 2111204
4 0000 FEET
DATE
FROM
TO
72/08/19
72/09/16
72/10/14
72/11/11
72/12/26
73/02/21
73/03/17
73/03/30
73/04/23
73/05/10
73/06/21
73/07/18
73/08/15
73/09/12
00630 00625
TIME DEPTH N028.N03 TOT KJEL
OF N-TOTAL N
DAY FEET
11
11
10
10
11
14
09
10
16
10
10
11
10
13
10
40
20
00
05
15
25
45
20
00
00
15
15
00
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.089
.096
.140
.034
.357
.360
.210
.189
.054
.100
.098
.054
.052
.075
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
2.
0.
0.
0.
700
700
550
500
290
750
520
640
440
820
500
800
460
600
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
092
116
110
042
038
056
026
029
027
067
180
110
072
063
MG/L P
0.021
0.015
0.012
0.008
0.007
0.008
0.007
0.007
0.009
0.011
0.028
0.030
0.017
0.023
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.040
.036
.032
.025
.016
.020
.020
.030
.035
.035
.065
.060
.055
.060
DEPTH
-------
STORE! RETRIEVAL DATE 74/11/26
0902A3 LS0902A3
41 45 50.0 073 11 28.0
BANTAM RIVER
09 7.5 W TORRINGTON
I/BANTAM LAKE
NORFOLK RD 8ROG BELO JR REPUB OF CT STP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/16
72/10/14
72/11/11
72/12/26
73/02/21
73/03/17
73/03/30
73/04/23
73/05/10
73/06/21
73/07/18
73/08/15
73/09/12
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
10
09
09
10
14
08
10
15
09
10
13
55
55
10
30
00
25
25
50
35
45
30
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.107
.130
.036
.357
.260
.210
.115
.130
.080
.160
.077
.082
.099
MG/L
0.
0.
0.
0.
0.
0.
0.
1.
0.
0.
0.
0.
0.
450
500
400
720
300
560
390
980
870
580
540
960
635
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
060
069
034
063
048
036
054
100
052
054
056
058
029
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
014
013
008
015
007
006
027
026
027
048
039
024
026
MG/L P
0.043
0.035
0.026
0.029
0.030
0.020
0.045
0.060
0.040
0.095
0.070
0.085
0.080
-------
STORET RETRIEVAL DATE 74/11/26
0902B1 LS0902B1
41 41 00.0 073 13 30.0
WHITTLESEY BROOK
09 7.5 LITCHFIELO
T/BANTAM LAKE
EAST SHORE RO BROG
11EPALES 2111204
4 0000 FEET
DATE
FROM
TO
72/09/16
72/10/14
72/11/11
73/02/21
73/03/17
73/03/30
73/04/23
73/06/21
73/07/18
73/08/15
73/09/1?
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
11
10
08
14
06
10
16
09
11
11
14
10
10
30
40
50
40
30
50
05
15
00
MG/L
0
0
0
1
0
0
0
0
0
0
0
.520
.530
.039
.020
.220
.770
.530
.850
.480
.660
.690
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
1.
1.
500
600
775
560
400
260
890
460
400
200
400
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
061
100
034
056
024
015
040
031
042
069
063
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
009
015
006
006
005
005K
009
016
016
022
023
MG/L P
0.042
0.036
0.025
0.075
0.020
0.020
0.025
0.040
0.030
0.260
0.250
DEPTH
K VALUE KNOWN TO *E
LESS THAN
-------
STORE! RETRIEVAL DATE 74/11/26
0902C1 LS0902C1
41 47 00.0 073 12 30.0
W BRANCH BANTAM RIVER
09 7.5 W TORRINGTON
T/BANTAM LAKE
ST HWY 63 BROG ABOVE STP
11EPALES 2111204
4 0000 FEET
DATE
FROM
TO
72/08/19
72/09/16
72/10/14
72/11/11
72/12/26
73/02/21
73/03/17
73/03/30
73/04/23
73/05/10
73/05/10
73/06/21
73/07/18
73/08/15
73/09/12
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
09
10
09
08
10
12
07
10
15
09
09
10
11
13
40
35
40
25
20
35
30
15
45
22
20
40
op
45
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.104
.138
.042
.039
.340
.252
.210
.088
.130
.018
.058
.230
.066
.126
.147
MG/L
0
0
0
0
0
2
0
1
0
0
0
0
0
0
•
•
•
•
•
•
•
•
•
•
•
•
•
•
925
500
550
450
390
000
540
300
760
460
950
540
560
710
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.054
0.062
0.066
0.046
0.018
0.110
0.031
0.060
0.083
0.042
0.031
0.042
0.032
0.024
0.019
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
027
020
010
007
006
030
012
013
021
008
016
039
0.030
0.
0.
031
034
MG/L P
0.039
0.048
0.027
0.026
0.010
0.065
0.020
0.015
0.060
0.023
0.040
0.060
0.050
0.070
0.075
DEPTH
-------
STORE! RETRIEVAL DATE 74/11/26
090201 LS0902D1
41 47 30.0 073 12 00.0
E BRANCH BANTAM RIVER
09 7.5 M TORRINGTON
T/9ANTAM LAKE
DEMING RD 8RDG ABOVE STP
11EPALES 2111204
4 0000 FEET
DEPTH
DATE
FROM
TO
72/08/19
72/09/16
7P/10/14
72/11/11
7?/ 12/26
73/02/21
73/03/17
73/03/30
73/04/23
73/05/10
73/06/21
73/07/18
73/08/15
73/09/12
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEF.T
10
09
08
10
13
07
10
15
09
10
11
14
45
45
50
25
45
55
20
40
25
45
30
15
MG/L
0
0
0
0
0
0
C
0
0
0
0
0
0
0
.420
.410
.380
.042
.690
.850
.336
.600
.350
.340
.160
.270
.110
.126
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
1.
0.
0.
0.
200
200
400
755
170
115
400
100K
170
340
000
700
460
970
00610 00671 00665
NH3-N PH05-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
042
048
056
066
016
014
042
009
018
015
147
027
097
099
MG/L
0.
p
019
O.OOfi
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
007
008
010
005K
010
005K
005K
006
014
008
005K
007
MG/L P
0.019
0.024
0.011
0.023
0.012
0.020
0.040
0.010
0.010
0.015
0.035
0.075
0.045
0.050
K VALUE KNOVN TO
LESS THAN
-------
STORET RETRIEVAL DATE 74/11/27
090250 AS090250 P003500*
41 47 00.0 073 12 30.0
CT JUNIOR REPUBLIC
09 7.5 W TORRINGTON
T/BATAM LAKE
BANTAM RIVER
11EPALES 2141204
4 0000 FEET DEPTH
00630 00625
DATE TIME DEPTH N02&N03 TOT KJEL
FROM OF N-TOTAL N
TO DAY FEET
73/01/31 11 00
CPCT)-
73/01/31 16 00
73/02/28 11 00
CP(T)-
73/02/28 16 00
73/03/30 11 00
CP-
73/04/30 16 00
73/05/31 11 00
CP(T)-
73/05/31 16 00
73/06/30 11 00
CP-
73/06/30 16 00
73/07/31 11 00
CP(T)-
73/07/31 16 00
73/09/01 11 00
CP(T)-
73/09/01 16 00
73/09/29 11 00
CP(T)-
73/09/29 16 00
73/11/01 11 00
CPU)-
73/11/01 16 00
73/l?/ll 11 00
CPU)-
73/12/11 16 00
74/01/16 11 00
CP(T)-
74/01/16 16 00
MG/L
3.400
2.100
0.870
42.500
2.100
1.900
9.200
15.400
3.800
3.360
0.720
MG/L
19.900
24.000
18.000
3.600
6.100
6.900
3.700
2.000
0.800
14.000
17.500
?4.000
00610 00671 00665 50051 50053
NH3-N PHOS-OIS PHOS-TOT FLOW CONDUIT
TOTAL ORTHO RATE FLOW-MOD
MG/L MG/L P MG/L P INST MOD MONTHLY
9.950
9.500
7.380
7.380
0.057 4.400
4.700
1.260 0.940
4.400
2.400 5.600
6.325 8.250
6.200
0.008
0.510 7.737 8.096 0.006
9.000 0.010
0.010
15.200 3.800 4.200 0.008 0.010
9.100 11.000 14.000 0.008 0.010
o.ooe o.oio
0.670 10.800 11.000 0.010 0.010
1.800 10.000 11.500 0.008 0.010
0.008 0.010
3.220 3.400 0.010 0.010
0.006
0.010 0.006
0.008
7.200 8.300 0.008 0.010
-------
STORE! RETRIEVAL DATE 74/11/27
DATE
FROM
TO
74/02/06
CP(T>-
74/02/06
00630
TIME DEPTH N02&N03
OF N-TOTAL
DAY FEET MG/L
11 00
16 00
4.800
20.000
090250 AS090250
41 47 00.0 073 12 30.0
CT JUNIOR REPUBLIC
09 7.5 W TORRINGTON
T/BATAM LAKE
BANTAM RIVER
P003500*
11EPALES
4
00625
TOT KJEL
N
MG/L
00610
NH3-N
TOTAL
MG/L
00671
PHOS-DIS
ORTHO
MG/L P
00665
PHOS-TOT
MG/L P
50051
FLOW
RATE
INST MGD
2141204
0000 FEET
50053
CONDUIT
FLOW-MGD
MONTHLY
DEPTH
H.500
3.400
3.900
8.000
10.000
------- |