U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
LAKE CHESDIN
Af€LIA, CHESTERFIELD, AND DINWIDDIE
COUNTIES
VIRGINIA
EPA REGION III
WORKING PAPER No, 458
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
•&GPO 697-032
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REPORT
ON
LAKE CHESDIN
AMELIA, CHESTERFIELD, AND DINWIDDIE
COUNTIES
VIRGINIA
EPA REGION III
WORKING PAPER No, 458
WITH THE COOPERATION OF THE
VIRGINIA STATE WATER CONTROL BOARD
AND THE . . 823
VIRGINIA NATIONAL GUARD
JUNE, B75
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CONTENTS
Page
Foreword .1.1
List of Virginia Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 5
IV. Nutrient Loadings 9
V. Literature Reviewed 14
VI. Appendices 15
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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)]s
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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iii
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 Virginia State Water Con-
trol Board for professional involvement and to the Virginia
National Guard for conducting the tributary sampling phase of
the Survey.
Eugene T. Jensen, Executive Secretary of the State Water
Control Board; Michael A. Bellanca, Director; Jean W. Gregory,
Pollution Control Specialist; and Robert W. Pitchford, Pollution
Control Technician; Bureau of Surveillance and Field Studies;
provided invaluable lake documentation and counsel during the
Survey, reviewed the preliminary reports, and provided critiques
most useful in the preparation of this Working Paper series.
Major General William J. McCaddin, the Adjutant General of
Virginia, and Project Officer Lt. Colonel James D. Manley, who
directed the volunteer efforts of the Virginia National Guardsmen,
also are gratefully acknowledged for their assistance to the
Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF VIRGINIA
LAKE NAME
Bluestone
Chesdin
Chickahominy
Claytor
J. H. Kerr
J. W. Flannagan
Occoquan
Rivanna
Smith Mountain
COUNTY
Giles, VA; Mercer,
Monroe, Summers, WV
Amelia, Chesterfield,
Dinwiddie
Charles City, New Kent
Pulaski
Charlotte, Hallifax,
Micklenburg, VA;
Granville, Vance,
Warren, NC
Dickenson
Fairfax, Prince William
Albemarle
Bedford, Franklin,
Pittsylvania
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37'30'
LAKE CHESDIN
® Tributary Sampling Site
X Lake Sampling Site
^ Sewage Treatment Facility
^) Drainage Area Boundary
Lakeside
Bon
Map Location
78'.00'
7730'
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LAKE CHESDIN
STORE! NO. 5111
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Lake Chesdin as eutrophic. It
ranked fifth in overall trophic quality when the eight Virginia
lakes sampled in 1973 were compared using a combination of six
parameters*. Three lakes had less and one had the same median
total phosphorus, two had less and one had the same median dis-
solved phosphorus, one had less median inorganic nitrogen, six
had less mean chlorophyll a_, and seven had greater mean Secchi
disc transparency.
Survey limnologists reported algal scums in small coves and
submerged and emergent vegetation along the shore near stations
1 and 2 in September.
B. Rate-Limiting Nutrient:
The algal assay results indicate that Lake Chesdin was phos-
phorus limited when the sample was collected (04/07/73). The lake
data indicate phosphorus limitation at the other sampling times
as well, except for station 3 in September.
C. Nutrient Controllability:
1. Point sources—The phosphorus contribution of known point
sources amounted to 14.9% of the total input to Lake Chesdin during
* See Appendix A.
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2 .
the sampling year. Contributing point sources included the
wastewater treatment facilities of Farmville #1 (12.3%),
Farmville #2 (2.3%), and the Correctional Field Unit #27 (0.3%).
The present phosphorus loading of 3.89 g/m2/yr is more than
twice that proposed by Vollenweider (Vollenweider and Dillon,
1974) as a eutrophic loading (see page 13). However, Vollen-
weider 's model probably does not apply to water bodies with short
hydraulic retention times, and the mean retention time of Lake
Chesdin is a relatively short 31 days.
While even complete removal of phosphorus at the listed point
sources would only reduce the overall loading to 3.31 g/m2/yr,
in view of the questionable applicability of the model, and because
Lake Chesdin primarily is phosphorus limited, all phosphorus inputs
should be minimized to the greatest practicable extent to slow the
present rate of eutrophication.
2. Non-point sources--Non-point sources accounted for about
85% of the total phosphorus input to Lake Chesdin during the sampling
year. After point-source loads were subtracted, the Appomattox
River contributed 64.5%, and Whipponock Creek contributed 0.4% of
the total. Other gaged tributaries were Deep Creek which contrib-
uted 10.2%; Namozine Creek, 3.2%; and Winterpock Creek, 1.2% of
the total load. Ungaged tributaries were estimated to have contrib-
uted '5.1% of the total phosphorus input.
The phosphorus export of the Appomattox River alone was large
enough to produce an overall loading of 2.51 g/m2/yr; i.e., well
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3
above a eutrophic loading. However, the phosphorus export rate
of the river was not much higher than the export rates of the
other Lake Chesdin tributaries (see page 12), but the relatively
large drainage-area to lake-area ratio of 188 to 1 would ensure
a significant non-point phosphorus load to the lake even if the
export rate could be reduced by one-third.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS*
tt
A. Lake Morphometry :
1. Surface area: 12.95 kilometers2.
2. Mean depth: 7.0 meters.
3. Maximum depth: >14.0 meters.
4. Volume: 90.650 x 106 m3.
5. Mean hydraulic retention time: 31 days.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Appomattox River 2,439.8 24.1
Whipponock Creek 26.4 0.2
Namozine Creek 151.8 1.5
Deep Creek 530.9 5.3
Winterpock Creek 53.9 0.5
Minor tributaries &
immediate drainage - 241.8 2.5
Totals 3,444.6 34.1
2. Outlet -
Appomattox River 3,457.6** 34.1
C. Precipitation***:
1. Year of sampling: 103.6 centimeters.
2. Mean annual: 108.9 centimeters.
t Table of metric conversions—Appendix B.
tt Bellanca, 1975.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of lake.
*** See Working Paper No. 175.
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5
III. LAKE WATER QUALITY SUMMARY
Lake Chesdin was sampled three times during the open-water season
of 1973 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from
three stations on the lake and from one or more depths at each
station (see map, page v). During each visit, a single depth-integrated
(4.6 m or near bottom to surface) sample was composited from the
stations for phytoplankton identification and enumeration; and during the
first visit, a single 18.9-liter 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 12.8 meters at station 1, 13.1 meters at station
2, and 1.2 meters at station 3.
The sampling results are presented in full in Appendix D and are
summarized in the following table.
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PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (IJG/L)
SECCHI (METERS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 4/ 7/73)
3 SITES
CHEMICAL CHARACTERISTICS FOR LAKE CHESOIN
STORET CODE 5111
2ND SAMPLING ( 7/13/73)
3 SITES
3RD SAMPLING ( 9/26/73)
3 SITES
RANGE
13.6
8.2
70.
7.2
26.
U.042
0.007
0.140
0.060
0.300
0.200
0.470
3.0
0.5
- 14.9
9.5
80.
7.5
28.
- 0.052
- 0.011
- 0.180
- 0.090
- 0.600
- 0.260
- 0.760
5.6
0.6
MEAN
14.2
8.8
73.
7.4
27.
0.048
0.008
0.157
0.078
0.418
0.235
0.575
H.7
0.5
MEUIAN
14.1
8.8
71.
7.5
27.
0.048
0.007
0.160
0.080
0.400
0.240
0.560
5.6
0.5
RANGE
18.8
0.2
85.
6.8
33.
0.022
0.005
0.060
0.070
0.500
0.130
0.560
9.4
0.8
- 29.4
7.6
- 114.
7.8
56.
- 0.087
- 0.016
- 0.160
- 1.500
- 1.900
- 1.580
- 1.980
- 25.0
1.8
MEAN
26.3
3.6
92.
7.2
42.
0.041
0.008
0.094
0.322
0.870
0.416
0.964
14.9
1.2
MEDIAN
27.2
2.8
88.
7.3
42.
0.035
0.007
0.085
0.140
0.650
0.245
0.795
10.2
1.0
RANGE
21.2
0.2
82.
6.5
29.
0.026
0.008
0.030
0.060
0.500
0.110
0.550
3.4
0.3
- 24.4
8.4
- 170.
7.3
53.
- 0.092
- 0.024
- 0.090
- 2.590
- 3.300
- 2.650
- 3.360
- 30.1
1.5
MEAN
23.0
4.1
93.
6.7
35.
0.047
0.012
0.051
0.419
0.991
0.470
1.042
18.1
0.9
MEDIAN
23.3
3.8
85.
6.7
35.
0.040
0.011
0.050
0.240
0.800
0.270
0.850
20.7
0.9
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Biological characteristics:
1. Phytoplankton -
Sampling
Date
04/07/73
07/13/73
09/26/73
2. Chlorophyll a_ -
Sampling
Date
04/07/73
07/13/73
09/26/73
Dominant
Genera
1. Flagellates
2. Dinobryon s£.
3. Stephanodiscus sp.
4. Pennate diatoms
5. AsterionellA sp.
Other genera
Total
1. Melosira sp.
2. Anabaena sp.
3. Cyclotella sp.
4. Flagellates
5. Ankistrodesmus sp.
Other genera
Total
1. Anabaena sp.
2. Melosira sp.
3. Cyclotella sj).
4. Flagellates
5. Pennate diatoms
Other genera
Total
Station
Number
01
02
03
01
02
03
01
02
03
Algal Units
per ml
291
230
182
109
73
255
1,140
4,630
694
537
442
189
673
7,165
284
213
142
124
71
197
1,031
Chlorophyll
(yg/1)
3.0
5.6
5.6
9.4
10.2
25.0
3.4
30.1
20.7
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8
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 0.010 0.150 2.8
0.050 P 0.060 0.150 5.7
0.050 P + 1.0 N 0.060 1.150 12.2
1.0 N 0.010 1.150 3.5
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
of Lake Chesdin was moderately high at the time the sample
was collected (04/07/73). A significant increase in yield
resulted from the addition of only phosphorus, indicating
that the lake was limited by phosphorus at that time. Note
that no such increase occurred when only nitrogen was added.
The lake data substantiate these findings. The mean
inorganic nitrogen/orthophosphorus ratios were 23/1 or greater
at all stations and sampling times, with the exception of
station 3 in September when the N/P ratio was about 9/1
(nitrogen limitation would be expected).
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IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Virginia National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v). .Sampling was begun in
July, 1973, and was completed in May, 1974.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Virginia District Office of the U.S. Geological Survey for the
tributary sites nearest the lake except for Nooning and Winticomack
Creeks (stations F-l and G-l). The drainage areas and flows of these
tributaries are included in "minor tributaries and immediate drainage".
Monthly samples were taken at these stations, and the data are included
in Appendix E for the record.
In this report, nutrient loads for sampled tributaries were
determined by using a modification of a U.S. Geological Survey computer
program for calculating stream loadings*. Nutrient loads shown are
those measured minus point-source loads, if any.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("ZZ" of U.S.G.S.) were estimated using the means of the
nutrient loads, in kg/km2/year, at stations C-l, D-l, and E-l and
multiplying the means by the ZZ area in km2.
The operator of the Farmville #1 wastewater treatment plant provided
monthly effluent samples and corresponding flow data. The operators of
the Correctional Field Unit #27 and Farmville #2 wastewater treatment
* See Working Paper No. 175.
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10
plants did not participate in the Survey, and nutrient loads were esti-
mated at 1.134 kg P and 3.401 kg N/capita/year.
A. Waste Sources:
1. Known municipal
t
Name
Pop.
Served
Treatment
Mean Flow
(m3/d)
Farmville #1 3,780
#2* 1,000
Correctional 125
Field Unit #27
stab, pond 2,074.4
stab, pond 378.5**
stab, pond 47.3**
2. Known industrial - None
Receiving
Water
Appomattox River
Appomattox River
Whipponock Creek
t Gregory, 1973.
* Anonymous, 1971.
** Estimated at 0.3785 m3/capita/day.
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11
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
Appomattox River 32,510 64.5
Whipponock Creek 225 0.4
Namozine Creek 1,630 3.2
Deep Creek 5,120 10.2
Winterpock Creek 610 1.2
b. Minor tributaries & immediate
drainage (non-point load) - 2,585 5.1
c. Known municipal STP's -
Farmville #1 6,205 12.3
#2 1,135 2.3
Correctional Field Unit #27 'l40 0.3
d. Septic tanks* - <5 <0.1
e. Known industrial - None
f. Direct precipitation** - 225 0.5
Total 50,385 100.0
2. Outputs -
Lake outlet - Appomattox River 47,240
3. Net annual P accumulation - 3,145 kg.
* Estimate based on six lakeshore dwellings; see Working Paper No. 175.
** See Working Paper No. 175.
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12
Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Appomattox River 426,805 68.9
Whipponock Creek 6,950 1.1
Namozine Creek 26,215 4.2
Deep Creek 78,170 12.6
Winterpock Creek 10,515 1.7
b. Minor tributaries & immediate
drainage (non-point load) - 41,515 6.7
c. Known municipal STP's -
Farmville #1 11,190 1.8
#2 3,400 0.6
Correctional Field Unit #27 425 0.1
d. Septic tanks* - 65 <0.1
e. Known industrial - None
f. Direct precipitation** - 13,980 2.3
Total 619,230 100.0
2. Outputs -
Lake outlet - Appomattox River 888,095
3. Net annual N loss - 268,865 kg.
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/kma/yr
Appomattox River 13 175
Whipponock Creek 9 263
Namozine Creek 11 173
Deep Creek 10 147
Winterpock Creek 11 195
* Estimate based on six lakeshore dwellings; see Working Paper No. 175.
** See Working Paper No. 175.
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13
E. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Essentially, his "dangerous" loading is
one at which the receiving water would become eutrophic or
remain eutrophic; his "permissible" loading is that which
would result in the receiving water remaining oligotrophic
or becoming oligotrophic if morphometry permitted. A meso-
trophic loading would be considered one between "dangerous"
and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated Total Accumulated
grams/m2/yr 3.89 0.24 47.8 loss*
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Lake Chesdin:
"Dangerous" (eutrophic loading) 1.74
"Permissible" (oligotrophic loading) 0.87
* There was an apparent loss of nitrogen during the sampling year. This
may have been due to nitrogen fixation in the lake, solubilization of
previously sedimented nitrogen, recharge with nitrogen-rich ground water,
or unknown and unsampled point sources discharging directly to the lake.
Whatever the cause, a similar nitrogen loss has occurred at Shagawa Lake,
Minnesota, which has been intensively studied by EPA's former National
Eutrophication and Lake Restoration Branch (Malueg et al., 1975).
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14
V. LITERATURE REVIEWED
Anonymous, 1971. Inventory of municipal waste facilities. EPA Publ.
OWP-1, vol. 3, Wash., DC.
Bellanca, Michael A., 1975. Personal communication (lake morphometry).
VA Water Contr. Bd., Richmond.
Gregory, Jean, 1973. Treatment plant questionnaire (Correctional
Field Unit #27 and Farmville #1 STP's). VA Water Contr. Bd.,
Richmond.
Malueg, Kenneth W., D. Phillips Larsen, Donald W. Schults, and
Howard T. Mercier; 1975. A six-year water, phosphorus, and
nitrogen budget for Shagawa Lake, Minnesota. Jour. Environ.
Qua!., vol. 4, no. 2, pp. 236-242.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
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VI. APPENDICES
15
APPENDIX A
LAKE RANKINGS
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DATA TO BE USED IN BANKINGS
LAKE
CODE LAKE NAME
5103 CLAfTOP LAKE
5105 JOHN rf. FLANNAGAN DAM
5106 JOHN H. KERR RESERVOIR
5108 OCCOOUAN RESERVOIR
5110 SMITH MOUNTAIN LAKE
5111 LAKE CHESDIN
5112 CHICKAHOMINY LAKE
5113 RIVANNA (SOUTH FORK) RES
MEDIAN
TOTAL P
0.031
0.011
0.04&
0.098
0.016
O.C-+4
0.066
0.079
MEUIAN
INO^G N
0.45C
0.320
0.290
0.525
0.410
0.240
0.125
0.475
500-
MEAN SEC
43V. 500
415.700
458.937
459.750
419.667
465.778
455.333
460.222
MEAN
CHLO^A
5.642
5.955
3.633
12.417
11.593
12.556
13.600
b.667
15-
MIN UO
14.900
14.800
15.000
15.000
15.000
14.800
9.400
13.000
MtOIAN
OIsS OKTnO
0.008
0.004
0.009
0.037
0.005
0.008
0.017
0.022
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PERCENT OF LAKES WITH NIGHEK VALUES
CODE LAKE NAME
5103 CLAYTOR LAKE
5105 JOHN w. FLANNAGAN DAM
5106 JOHN H. KEHR RESERVOIR
5108 OCCOQUAN RESENVOIrt
511C SMITH MOUNTAIN LAr-E
5111 LAKE CHESDIN
5112 CHICKAHOMINY LAKE
5113 RIVANNA (SOUTH FORK) RES
OF LAI\ES *ITH HIGHER VALUES)
MEDIAN
TOTAL P
71 (
100 <
43 (
0 (
86 (
57 (
29 (
14 (
5)
7)
3)
0)
6)
4)
2)
1)
MEDIAN
INOSG
29 (
57 <
71 <
0 (
43 (
86 (
100 (
14 <
N
2)
4)
5)
0)
3)
6)
7)
1)
500-
MEAN SEC
71 (
100 (
43 (
29 {
86 (
0 (
57 (
14 (
5)
7)
3)
2)
6)
0)
4)
1)
MEAN
CHLGHA
100 (
86 (
57 (
. 29 (
43 (
14 (
0 (
71 (
7)
6)
4>
2)
3)
1)
01
5)
15-
MIiN
43
64
14
14
14
64
100
86
(
(
<
(
(
(
(
(
MEDIAN INOEX
MIiN 00 D1SS UKTHO f NO
) b4 ( 4) 3/8
64 ( 4) 100 ( 7) 507
< 0) 43 ( 3) 271
14 ( 0) 0(0) 72
14 (0) H6 ( 6) 358
64 (4) 64 ( 4) 2S5
100 (7) 29 ( 2) 315
86 (6) 14 ( 1) 213
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LAKES WANisEO dY INOEA NOS.
RANK LAKE CODE LAI\E NAME INDEX NO
I 510b JOHN W. FLANNAGAN 0AM 507
2 5103 CLAYTOR LAKE 378
3 5110 SMITH MOUNTAIN LAKE 358
<» 5113 CHICKAHOMINY LAKE 315
5 5111 LAKE CHESOIN ?85
6 5106 JOHN H. KERi* RESEHVOIR ?71
7 5113 RIVANNA (SOUTH FORK) RES 213
8 5108 OCCOOUAN RESERVOIR 72
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APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
-4
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
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APPENDIX C
TRIBUTARY FLOW DATA
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TRIBUTARY FLOW INFORMATION FOR VIRGINIA
02/05/76
LAKE CODE Sill LAKE CHESDIN
TOTAL DRAINAGE AREA OF LAKE(SO KM) 3457.6
SUB-DRAINAGE
TRIBUTARY AREA(SO KM)
JAN
FEB
MAR
APR
MAY
NORMALIZED FLOMS(CMS)
JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
5111A1
5111A2
5111B1
5111C1
511101
5111E1
5111ZZ
3457.6
2439. 8
26.4
151.8
530.9
53.9
255.9
47.57
33.70
0.28
1.98
7.65
0.62
3.40
59.47
41.91
0.40
2.66
9.63
0.82
4.53
59.47
42.48
0.57
2.55
8.78
0.99
4.25
49.55
34.55
0.37
2.18
7.93
0.74
3.68
33.98
23.79
0.31
1.47
5.10
0.54
2.38
21.24
15.29
0.17
0.85
3.11
0.31
1.42
18.97
13.88
0.07
0.68
2.78
0.19
1.22
24.35
17.56
0.08
0.88
3.68
0.22
1.59
18.69
13.59
0.10
0.71
2.83
0.23
1.25
18.12
12.46
0.16
0.85
2.83
0.31
1.36
24.07
16.42
0.16
1.30
4.25
0.40
2.12
35.11
24.35
0.37
1.70
5.38
0.68
2.66
34.07
24.06
0.25
1.48
5.30
0.50
2.47
TOTAL DRAINAGE AREA OF LAKE
SUM OF SUB-DRAINAGE AREAS
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR
5111A1
5111A2
7
8
9
10
11
12
1
2
3
4
5
7
8
9
10
11
12
1
2
3
4
5
73
73
73
73
73
73
74
74
74
74
74
73
73
73
73
73
73
74
74
74
74
74
MEAN FLOW DAY
24.07
28.32
16.42
17.27
13.03
76.46
73.62
53.80
45.31
43.04
41.06
16.14
18.69
9.63
11.04
9.49
52.39
50.97
41.63
36.81
29.73
31.15
14
12
8
13
10
8
12
9
23
20
5
14
12
8
13
10
8
12
9
23
20
5
3457.6
3458.7
FLOW DAY
18.69
12.74
15.01
13.88
11.61
20.67
62.30
76.46
92.03
24.64
30.30
12.46
8.21
9.06
8.78
11.04
20.95
43.89
57.48
96.28
23.22
25.77
11
13
11
13
SUMMARY
TOTAL FLOW IN
TOTAL FLOW OUT
410.63
410.59
FLOW DAY
24.49
48.14
FLOW
10.28
37.94
-------
TRIBUTARY FLOW INFORMATION FOR VIRGINIA
02/05/76
LAKE CODE 5111
LAKE CHESOIN
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
5111B1
5111C1
5111D1
5111E1
7
8
9
10
11
12
1
2
3
4
5
7
8
9
10
11
12
1
2
3
4
5
7
8
9
10
11
12
1
2
3
4
5
7
8
9
10
11
12
1
2
3
4
5
73
73
73
73
73
73
74
74
74
74
74
73
73
73
73
73
73
74
74
74
74
74
73
73
73
73
73
73
74
74
74
74
74
73
73
73
73
73
73
74
74
74
74
74
0.08
0.06
0.06
0.04
0.15
0.37
0.42
0.28
0.22
0.23
0.18
0.65
0.59
0.40
0.34
0.74
0.25
2.72
2.01
1.59
1.47
1.25
2.72
2.83
1.73
1.59
2.10
10.11
10.34
7.79
7.36
5.66
3.68
0.20
0.17
0.11
0.09
0.28
0.82
0.93
0.65
0.48
0.48
0.40
14
12
8
13
10
6
12
9
23
20
5
14
11
8
13
10
8
12
9
23
20
5
14
12
8
13
10
8
12
9
23
20
5
14
12
8
13
10
8
12
9
23
20
5
FLOW DAY
0.06
0.03
0.03
0.03
0.13
0.08
0.40
0.45
0.45
0.14
0.16
0.48
0.25
0.34
0.25
0.65
0.57
2.41
2.92
3.45
0.93
1.08
2.07
1.13
1.53
1.25
1.76
2.41
8.01
10.25
18.69
3.17
3.40
0.14
0.06
0.08
0.07
0.25
0.18
0.82
0.96
1.05
0.31
0.34
11
13
11
13
11
13
11
13
FLOW DAY
0.15
0.28
FLOW
0.74
1.78
1.61
5.95
0.28
0.62
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/02/05
511101
37 13 15.0 077 31 34.0
LAKE CHESOIN
51041 VIRGINIA
11EPALES
3
DATE
FROM
TO
73/04/07
73/07/13
73/09/26
TIME DEPTH
OF
UAY FEET
15 45 0000
15 45 0006
15 45 0015
15 45 0022
15 45 0033
16 15 0000
16 15 0006
16 15 0015
16 15 0028
16 15 0042
14 10 0000
14 10 0015
14 10 0020
14 10 0025
14 10 0035
14 10 0042
00010
MATER
TEMP
CENT
14.9
14.9
14.6
14.4
13.9
29.4
29.3
26.5
23.0
16.8
23.5
23.4
23.3
23.0
22.4
21.2
00300
00
MG/L
8.7
8.7
8.5
B. 2
6.7
0.2
0.2
0.8
3.8
2.6
2.8
0.8
2.4
0.2
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
24 75
71
71
72
70
72 87
86
85
88
114
60 84
85
85
90
88
170
00400
PH
SU
7.50
7.50
7.50
7.50
7.50
7.50
7.50
6.80
6.80
6.90
6.70
6.70
6.70
6.60
6.60
6.50
00410
T ALK
CAC03
MG/L
26
26
28
27
26
44
42
42
45
56
35
36
35
37
38
53
2111202
0037 FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.080
0.080
0.080
0.080
0.090
0.130
0.110
0.240
0.400
1.500
0.260
0.250
0.240
0.340
0.280
2.590
00625
TOT KJEL
N
MG/L
0.600
0.400
0.400
0.400
0.400
1.200
0.600
0.600
0.900
1.900
0.800
0.600
0.700
0.900
0.800
3.300
00630
N02&N03
N-TOTAL
MG/L
0.160
0.160
0.160
0.160
0.160
0.090
0.090
0.130
0.070
0.080
0.040
0.030
0.030
0.040
0.060
0.060
00671
PHOS-DIS
ORTHO
MG/L P
0.009
0.008
0.007
0.007
0.008
0.005
0.005
0.008
0.015
0.016
0.010
0.009
0.009
0.008
0.008
0.011
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FkOM OF A
TO DAY FEET MG/L P UG/L
73/04/07 15 45
15 45
15 45
IS 45
15 45
73/07/13 16 15
16 15
16 15
16 15
16 15
73/09/26 14 10
14 10
14 10
14 10
14 10
14 10
0000
0006
0015
0022
0033
0000
0006
0015
0028
0042
0000
0015
0020
0025
0035
0042
0.049
0.046
0.042
0.043
0.046
0.025
0.022
0.035
0.031
0.087
0.028
0.026
0.026
0.033
0.040
0.077
3.0
9.4
3.4
-------
STORE! RETRIEVAL DATE 76/03/05
511102
37 14 47.0 077 35 23.0
LAKE CHESOIN
51041 VIRGINIA
DATE
FROM
TO
73/04/07
73/07/13
73/09/26
DATE
FROM
TO
73/04/07
73/07/13
73/09/26
TIME DEPTH
OF
DAY FEET
16 15
16 15
16 15
16 15
15 30
15 30
15 30
15 30
15 30
13 45
13 45
13 45
13 45
TIME
OF
DAY
16 15
16 15
16 15
16 15
15 30
15 30
15 30
15 30
13 45
13 45
13 45
13 45
0000
0006
0015
0024
0000
0006
0012
0020
0024
0000
0010
0015
0043
DEPTH
FEET
0000
0006
0015
0024
0000
0006
0012
0020
0000
0010
0015
0043
00010
MATER
TEMP
CENT
14.1
14.2
13.9
13.9
29.3
28.4
27.2
25.2
23.9
24.4
24.1
22.9
21.4
00665
PHOS-TOT
MG/L P
0.051
0.052
0.048
0.051
0.031
0.035
0.036
0.052
0.037
0.041
0.045
0.069
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
9.3
8.9
9.0
7.3
4.7
1.0
8.4
7.8
4.2
5.2
32217
CHLRPHYL
A
UG/L
5.6
10.2
30.1
18 70
70
70
70
40 87
85
88
93
109
34 82
82
86
84
11EPALES
3
00400 00410
PH T ALK
CAC03
su
7.40
7.50
7.50
7.50
7.80
7.40
7.20
6.80
7.30
6.90
6.70
6.50
MG/L
28
28
27
28
33
34
42
48
29
29
30
35
2111202
0024 FEET DEPTH
00610 00625 00630 00671
NH3-N TOT KJEL N02UI03 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L
0.080
0.070
0.060
0.090
0.070
0.070
0.150
0.450
0.090
0.060
0.170
0.180
MG/L
0.500
0.400
0.400
0.400
0.600
0.500
0.500
0.700
0.800
0.800
0.500
0.500
MG/L MG/L P
0.140
0.150
0.140
0.150
0.060
0.060
0.120
0.160
0.050
0.050
0.050
0.090
0.008
0.011
0.007
0.007
0.005
0.005
0.007
0.007
0.015
0.013
0.011
0.014
-------
STORE! RETRIEVAL DATE 76/02/05
511103
37 15 55.0 077 39 05.0
LAKE CHESDIN
51053 VIRGINIA
DATE
FROM
TO
73/04/07
73/07/13
73/09/26
DATE
FROM
TO
73/04/07
73/07/13
73/09/26
TIME DEPTH
OF
DAY FEET
15 50 0000
15 50 0004
15 15 0000
13 30 0000
TIME DEPTH
OF
DAY FEET
15 50 0000
15 50 0004
15 15 0000
13 30 0000
00010
WATER
TEMP
CENT
13.7
13.6
27.9
23.5
00665
PHOS-TOT
MG/L P
0.052
0.047
0.058
0.092
00300
DO
MG/L
9.5
7.6
7.2
32217
CHLRPHYL
A
UG/L
5.6
25.0
20.7
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
18
30
12
80
80
89
84
11EPALES
3
00400
PH
SU
7.20
7.30
7.50
6.80
00410
T ALK
CAC03
MG/L
27
27
38
30
2111202
0008
00610
NH3-N
TOTAL
MG/L
0.080
0.070
0.100
0.150
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.400
0.300
1.200
1.200
00630
N02&N03
N-TOTAL
MG/L
0.180
0.170
0.080
0.060
00671
PHOS-DIS
ORTHO
MG/L P
0.007
0.007
0.008
0.024
-------
APPENDIX E
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 73/U3/26
S111A1
37 13 12.0 077 31 30.0
APPOMATTOX RIi/ER
51019 7.5 SUTHERLAND
0/LAKE CrlESDIN
AT DAM 2.5 Ml NE OF SUTHERLAND
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
7J/07/14
73/08/12
73/09/Oh
73/10/lj
73/11/11
73/12/08
74/01/12
74/02/09
74/03/23
74/04/20
74/05/05
uub3u
TIME DEPTH UO?MSi03
OF
DAY FEET
u9 40
14 00
11 IS
11 IS
09 S7
10 ?0
10 40
12 20
09 00
11 25
17 00
N- TOTAL
MG/L
u.075
0.031
0.056
o.O &9
0.070
0.056
o . Ibtt
(J . 148
0 « 12u
0.080
0 . 0 24
00625
TOT KJtL
N
MG/L
1.800
0.980
l.uOO
0.550
O.tSO
0.300
U.4UO
0.500
1.300
0.600
0.200
OOblU
NH3-N
TOTAL
Mb/L
0.520
0.440
u.490
J.190
0.199
J.048
J.032
C.040
j.040
0.050
u.osu
00671
PnuS-oIS
ORTHO
MG/L P
0.028
0.022
0.014
0.012
0.007
0.008
0.020
0.015
0.010
0.015
0.010
00665
PHOS-TOT
MG/L P
0.055
0.065
0.045
0.035
0.055
0.050
0.060
0.035
0.045
0.020
0.020
-------
STORET RETRIEVAL DATE 7b/03/26
5111A2
37 19 04.0 077 48 30.0
APPOMATTOX RIVER
51 7.5 MANNdOKO
I/LAKE CHESUIN
RF 602 BEVILLS BRDG 1.2 MI E JCT RT 612
11EPALES 211120^
4 0000 FEET DEPTH
DATE
FROM
TO
73/07/14
73/08/12
73/09/08
73/10/13
73/11/11
73/12/06
7^/01/12
74/02/09
7<*/o3/23
7W04/20
7<+/05/05
00630 00625
TIME DEPTH N02MM03 TOT KJEL
OF rvi- TOTAL N
DAY FEET
12
15
14
14
11
11
10
13
11
12
18
20
^0
00
00
?7
55
20
20
40
25
00
Mb/L
U
0
0
0
U
I'
0
0
0
0
• c
.260
.15<*
.210
.138
.04tt
.160
.216
.18*
.044
.112
.168
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
1.
0.
0.
320
590
210
650
150
200
300
800
000
200
200
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
Mu/L
0.
0.
U.
0.
0*
0 .
0.
0.
0.
0.
0.
036
270
100
220
032
005K
020
045
UfO
020
020
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
016
017
021
016
018
016
024
020
020
010
010
MG/L P
0.050
0.035
0.080
0.035
0.045
0.090
0.065
0.070
0.060
0.010
0.040
K VALUE KNOrtN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DAl'£ 75/03/^6
5111B1
37 13 13.0 077 37 35.0
WHIPPENOCK CREEK
51 7.5 CHURCH RO
T/LAKE CHESOIN
Hi 708 BRUG 4 Ml N* OF SUTHERLAND
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/07/14
73/08/12
73/09/08
73/10/13
73/11/11
73/12/08
74/01/12
74/02/09
74/03/23
74/04/20
74/05/05
00630 00625
TIME DEPTH NU^&NOJ TUT KJEL
OF N-TOTAL N
DAY FEET
14
16
15
14
13
12
10
14
11
13
19
00
30
20
45
32
50
10
35
45
15
30
MG/L
0
0
0
0
0
0
0
0
0
0
0
.294
.190
.154
.090
.044
.Cb4
.124
.16J
.080
.056
.108
MG/L
1.
2.
0.
0.
0.
0.
0.
1.
0.
0.
0.
200
940
170
550
350
300
300
000
400
600
600
00610 00671 00665
NH3-N PHOS-DIS PHOb-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0 .
0.
0.
0.
0.
046
110
080
063
025
012
024
115
025
020
080
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
030
036
031
027
023
020
012
010
010
020
025
MG/L P
0.060
0.065
0.095
0.055
0.060
0.055
0.030
0.01}
0.025
0.020
0.055
-------
bTORET RETRIEVAL DAT£ 75/03/26
DATE
FROM
TO
73/u7/l<*
73/08/11
73/09/08
73/10/13
73/11/11
73/12/08
74/01/12
7<4/o2/09
74/03/23
74/04/20
74/05/05
TIME DEPTH
OF
DAY FEET
13 45
16 20
15 10
14 35
13 58
12 45
13 20
14 20
11 30
13 05
19 10
00630
i\l02t*N03
N- TOTAL
MG/L
0.060
C.010K
U.010K
0.017
O.OlOtV
0.012
0.052
0.040
0.020
0.012
0.028
00625
TOT KJEL
N
MG/L
0.720
0.900
0.100K
0.700
0.650
0.100
0.400
0.300
1.000
U.<+00
0.400
00610
NH3-N
TOTAL
MG/L
0.023
0.022
0.039
0.120
0.018
0.008
0.020
0.020
0.035
0.015
0.035
00671
PHOS-DIS
ORTHO
MG/L P
0.018
0.009
0.008
0.010
0.018
0.008
0.012
0.010
0.010
0.010
0.020
HEPALES
4
00665
PHOS-TOT
MG/L P
0.065
0.055
0.035
0.035
0.040
0.035
0.035
0.015
0.025
0.030
0.035
51HC1
37 14 37.0 077 39 44.0
NAMUZINE CREEK
bl 7.5 CHURCH RD
T/LAKE CHESDIN
NT 708 BRDG 3.5 Ml ESE OF WHITES STORE
2111204
0000 FEET DEPTH
K VALUE KNOWN TO B£
LESS THAN INDICATED
-------
STORE"! RETRIEVAL DATE 75/03/26
511101
37 18 16.0 077 49 14.0
DEEP CREEK
51 7.5 MANNBORO
T/LAKE CHESUIN
RF 612 BROG 4 Ml N OF MANNBORO
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/07/14
73/08/12
73/09/06
73/10/13
73/11/10
73/12/08
74/01/12
74/02/09
74/03/23
74/04/20
74/U5/05
U0630 00625
TIME DEPTH N02&N03 TOT KJEL
OH N-TOTAL N
UAY FEET
12
15
14
14
10
12
13
13
10
12
16
30
50
30
05
13
05
50
30
45
40
10
MG/L
0
u
0
•J
0
0
0
0
0
0
u
.168
.076
.079
.019
.010*
.010K
.056
.076
.044
.02U
.044
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
520
930
160
550
300
300
300
300
650
200
200
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
•*
w .
0.
0.
0.
0.
0.
0 •
0.
0.
025
042
083
040
Oil
032
012
025
02u
015
025
MG/L
0.
0.
0.
0.
o.
0.
0*
0.
0*
0.
0.
p
019
021
019
Oil
016
005K
016
010
015
010
015
MG/L P
0.035
0.030
0.035
0.020
0.035
0.040
0.040
0.025
0.045
0.020
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL UAlt 75/03/26
5111E1
37 Id 17.0 077 41 17.0
alNTERPOCK CHEEK
51 7.5 WINTERPOCK
T/LAKE CHESOIN
bAiMK NEAR MOUTH TRAIL AT END SEC RD
HEPALES 211120'*
4 0000 FEET DEPTH
DATE
FROM
TO
73/07/14
73/08/12
73/09/08
73/1U/13
73/11/11
73/12/OH
7<»/01/12
74/03/23
74/04/20
74/05/05
TIME DEPTH
OF
DAY FEET
11 45
14 45
13 00
12 20
12 18
11 25
13 35
10 15
12 15
17 42
00630
i\i02e»N03
N-TOTAL
MG/L
J.072
0.015
0.010K
0.012
0.010K
0.032
0.036
0.016
0.020
0.040
00625
TOf KJEL
N
MG/L
2.000
0.560
0.250
0.725
0.500
0.600
0.300
0.600
0.300
0.300
00610
NH3-N
TOTAL
M'j/L
J.140
0.026
0.040
0.025
0.029
0.044
0.020
0.035
0.015
0.045
00671
PHOS-D1S
ORTHO
MG/L P
0.012
0.012
0.012
0.010
0.024
0.016
O.OOct
0.010
0.010
0.015
00665
PnOS-TOT
MG/L P
0.045
0.050
0.055
0.050
0.080
0.035
0.015
0.030
0.025
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET KETKIEV/AL OATE 75/03/26
5111F1
37 17 20.0 077 39 30.0
NOONING CREEK
bl 70b dlNTEKPOCK
T/LAKE CHESDIN
AlNG 2 MI SW PA HWY 602 &. 657 JCT
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FKOM
TO
73/07/14
73/08/12
73/09/08
73/10/13
73/11/10
73/12/OH
74/01/12
74/03/23
74/04/20
74/05/05
TIME DEPTH
OF
DAY FEET
10 30
15 10
12 00
11 55
12 47
11 00
14 20
09 45
11 15
17 20
OU630
N02MN03
N-roTAL
MG/L
0.072
0.065
0.075
a . 0 1 4
0.037
0.028
0.024
0.040
u.016
0.020
00625
TOT KJEL
N
MG/L
0.290
1.600
0.370
0.150
0.750
0.300
0.40U
1.000
0.4UO
0.400
00610
IMH3-N
TOTAL
MG/L
0.019
0.294
0.360
0.026
0.310
0.056
0.056
U.035
O.U15
0.035
00671
PHOS-DIS
ORTHO
MG/L P
0.012
0.031
0.033
0.012
C.022
0.008
0.008
0.015
0.020
0.020
00665
PHOS-TOT
MG/L P
0.030
0.080
0.095
0.020
0.045
0.065
0.025
0.035
0.025
0.055
-------
STORET RETRIEVAL GATE 7b/03/26
5111G1
37 15 13.0 077 44 20.0
WINT1COMACK CrtEEK
51 705 WINTERPOCK
T/LAKE CHESDIN
PA HWY 622 BKOG .75 MW PA HWY 708 JCT
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/07/14
73/08/12
73/09/08
73/10/13
73/11/11
73/12/08
74/01/12
74/o2/09
74/33/23
74/04/20
74/05/05
00630 00625
TIME DEPTH MU2^N03 TOT KJ£L
OF N-TOTAL N
DAY FEET
11
16
14
14
10
12
14
14
11
12
IB
05
00
30
15
SI
15
00
00
00
50
50
Mb/I.
\j
(j
• o
0
c
(1
0
0
0
0
0
.160
.096
.022
.023
.010*
.012
.020
.040
.016
.012
.032
MG/L
0.
2.
1.
0.
0.
0.
0.
0.
1.
0.
0.
980
400
300
700
500
500
500
600
000
400
500
U0610 00671 00665
NH3-N PhOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
u.
0.
0.
064
270
035
052
038
024
016
025
050
020
055
MG/L
0.
G .
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
030
031
019
016
023
012
012
010
010
017
025
M6/L P
O.UBO
0.080
0.075
0.060
0.080
0.055
0.035
0.015
0.030
0.030
0.055
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
511IAA PtolllAA
37 lb 18.0 07t> 23 05.0
FO'A/N UF t-'AKMVILLt
:>1;,19 /.D FAKMVlLLt.
I/LAKE CniiSOIivl
wPPOMATTuA KIVtK
^003780
0000 FEET DEPTH
ATE
Tu
11/24
ltr/28
u 1/24
u 3/2?
04/ \ii
T I H t D L ° T H
OF
Oar Ft>;T
14 00
14 00
15 30
14 00
09 30
10 30
o 0 b 3 j
• jU.'M'IU j
N-TuT.aL
Hb/L
J.09i^
••• .32u
1 . ?MI.'
' 3 ** J
>. . 20o
:• . 2vU
00b2b
rui KJEL
N
"iG/L
?4.:;00
1 5 . D 0 0
]4.udO
1 3 . !.' 0 0
*.tu(j
u..iblo
Nn.<-N
fOl AL
MG/L
o • u ^ 0
D • t? U 0
3.400
4.500
^.500
r? . 8 0 u
0 0 b 7 1
HnOS-Ulb
OK TuO
MG/L P
H./OO
^.9UO
b.200
5.900
6.600
5.4JO
OObbD
PnOb-TOT
MG/L P
11.000
5.750
7. /Oo
b.OUO
/.BOU
50051
hLOw
PAlt
INS'T MbO
0.555
0 .540
0.597
0.720
0.5b5
0 .b 75
50053
CONDUIT
FLOlv-MGD
MONTHLY
0.540
0.500
0.500
O.bOO
O.bOO
0.500
------- |