U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
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
-------
REPORT
ON..
STILLMER LAIC
WTO COUNTY
PENNSYLVANIA
EPA REGION III
WORKING PAPER No, 427
WITH THE COOPERATION OF THE
PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL RESOURCES
AND THE
PENNSYLVANIA NATIONAL GUARD
JUNE, J975
6S3
-------
CONTENTS
Page
Foreword i i
List of Pennsylvania Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 12
VI. Appendices 13
-------
ii
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 [§3H(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 Pennsylvania Department
of Environmental Resources for professional involvement and to
the Pennsylvania National Guard for conducting the tributary
sampling phase of the Survey.
Walter A. Lyon, Director of the Bureau of Water Quality
Management, Richard M. Boardman, Chief of the Division of Water
Quality, and James T. Ulanoski, Aquatic Biologist of the Division
of Water Quality, 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 Harry J. Mier, Jr., the Adjutant General of
Pennsylvania, and Project Officer Major Ronald E. Wickard, who
directed the volunteer efforts of the Pennsylvania National
Guardsmen, are also gratefully acknowledged for their assistance
to the Survey.
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1v
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF PENNSYLVANIA
LAKE NAME
Allegheny Reservoir
Beaver Run Reservoir
Beltzville
Blanchard Reservoir
Canadohta
Conneaut
Conewago (Pinchot)
Green!ane
Harveys
Indian
Naomi
Ontelaunee
Pocono
Pymatuning Reservoir
Shenango River Reservoir
Stillwater
Wallenpaupack
COUNTY
McKean, Warren, PA;
Cattarugus, NY
Westmoreland
Carbon
Centre
Crawford
Crawford
York
Montgomery
Luzerne
Somerset
Monroe
Berks
Monroe
Crawford, PA;
Ashtabula, OH
Mercer
Monroe
Pike, Wayne
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41*10 •
STILLWATER LAKE
<8> Tributary Sampling Site
X Lake Sampling Site
o ' i 2Km.
41*08'-
POCONO
SUMMIT
75°26'
Penn.
Map Location
75'24' 41°06'-
-------
STILLWATER LAKE*
STORE! NO. 4228
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Stillwater Lake is mesotrophic.
It ranked fourth in overall trophic quality when the 17 Penn-
sylvania lakes sampled in 1973 were compared using a combination
of six lake parameters**. Four of the lakes had less and two
had the same median total phosphorus, none had less median
dissolved phosphorus, four had less and one had the same median
inorganic nitrogen, 12 had less mean chlorophyll a_, and ten had
greater mean Secchi disc transparency.
Survey limnologists did not observe surface algae but did
note rooted aquatic plants near the middle of the lake.
B. Rate-Limiting Nutrient:
The algal assay results indicate that Stillwater Lake was
phosphorus limited when the sample was collected (04/17/73).
The lake data indicate phosphorus limitation at all sampling
times.
C. Nutrient Controllability:
1. Point sources—The estimated phosphorus contribution
from septic tanks serving shoreline dwellings was less than 2%
* Table of metric conversions—Appendix A.
** See Appendix B.
-------
of the total load reaching Stillwater Lake during the sampling
year. The present phosphorus loading rate of 0.25 g/m2/yr is
less than that proposed by Vollenweider (Vollenweider and Dillon,
1974} as an oligotrophic rate (see page 11). However, any phos-
phorus inputs should be minimized to the greatest practicable
extent to maintain the existing trophic condition of Stillwater
Lake.
2. Non-point sources—Over 98$ of the total phosphorus
input to Stillwater Lake was contributed by non-point sources
during the sampling year. Hawkeye Run contributed 32.4%, and
the unnamed stream (B-1) contributed 31%. Ungaged tributaries
were estimated to have contributed 28.2% of the total phos-
phorus load.
The phosphorus exports of both tributaries were quite low
during the sampling year (see page 11) and compare well with
the exports of the three tributaries of nearby Pocono Lake*
(mean of 10 kg/km2/yr; range of 5 to 14 kg/km2/yr).
* Working Paper No. 424.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry :
1. Surface area: 1.41 kilometers2.
2. Mean depth: 1.0 meters.
3. Maximum depth: 2.4 meters.
4. Volume: 1.410 x 106 m3.
5. Mean hydraulic retention time: 23 days.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Unnamed Stream (B-l) 8.9 0.2
Hawkey Run 14.9 0.3
Minor tributaries &
immediate drainage - 9.8 0.2
Totals 33.6 0.7
2. Outlet -
Upper Tunkhannock Creek 35.0** 0.7
C. Precipitation***:
1. Year of sampling: 149.0 centimeters.
2. Mean annual: 120.3 centimeters.
t Ulanoski, 1975.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of lake.
*** See Working Paper No. 175.
-------
III. LAKE WATER QUALITY SUMMARY
Stillwater Lake was sampled three times during the open-water season
of 1973 by means of a pontoon-equipped Huey helicopter. Each time,
surface samples for physical and chemical parameters were collected from
one station on the lake (see map, page v). During each visit, a depth-
integrated sample (near bottom to surface) was collected for phyto-
plankton identification and enumeration; and a similar sample was col-
lected for chlorophyll a. analysis. During the first visit, a single
18.9-liter depth-integrated sample was taken for algal assays. Only
surface samples were collected for chemical analyses.
The lake sampling results are presented in full in Appendix D and
are summarized in the following table.
-------
PAKAMETErt
TEMfJ .I
5H.
7.B
10.
O.Olb
0.007
U. I4U
U.040
o.soo
o. lao
0.641)
42.2
1.5
A. SUMMAKf OF PHYSICAL AND
1ST SAMPLING ( H/17/73»
1 SITES
MEAN MEDIAN
10.0 10.0 10.0
- 10.7 10.7 10.7
56. 56. 5«.
7.8 7.8 7.8
10. 10. 10.
- 0.01S 0.015 O.Olb
- 0.007 0.007 0.007
•"" 0*140 0 * 1 ^ti 0 • 1 ^(j
- U.040 0.040 0.040
- 0.500 O.bCC (J.SOO
- ii.iao o.iaj o.iHO
•~ 0.64U O.b4lr 0»to4U
42.2 42.
-------
B. Biological characteristics:
1. Phytoplankton* -
Sampling Dominant
Date Genera
07/23/75 1 .
2.
3.
4.
5.
10/03/73 1.
2.
3.
4.
5.
Peridinium
Coccoid Chlorophyta
cells
Cryptomonas
Synedra
Flagellates
Other genera
Total
Chlorella
Flagellates
Melosira
Eunotia
Glenodinium
Other genera
Algal units
per ml
391
112
74
56
37
76
746
5,236
237
79
68
45
112
2. Chlorophyll a^ -
Total
5,777
Sampling
Date
04/17/73
07/23/73
10/03/73
Station
Number
01
01
01
Chlorophyll a
(yg/1 )
42.2
5.8
6.7
* The April sample was lost in shipment.
-------
0.008
0.058
0.058
0.008
0.140
0.140
1.140
1.140
0.1
2.0
14.2
0.1
18/1
2/1
20/1
142/1
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N Maximum yield N/P
Spike (mg/1) Cone, (mg/1) Cone, (mg/1) (mg/1-dry wt.) Ratio
Control
0.050 P
0.050 P + 1.0 N
1.0 N
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
of Stillwater Lake was low at the time the sample was col-
lected. An increase in yield occurred when only phosphorus
was added, but no increase occurred with the addition of only
nitrogen. Therefore, phosphorus limitation is indicated.
The relatively small increase in yield resulting from
the orthophosphorus spike was due to the shift to nitrogen
limitation when the excess phosphorus was added (note the
change in the N/P ratios). The control sample would have
become nitrogen limited with the addition of only about
x
0.002 mg/1 of orthophosphorus so about 96% of the 0.050 mg/1
spike could not be utilized by the assay algae. Hence the
small growth response to the phosphorus addition.
The lake data substantiate phosphorus limitation. At all
sampling times, the mean N/P ratios were 22/1 or greater and
phosphorus limitation would be expected.
-------
8
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Pennsylvania
National Guard collected monthly near-surface grab samples from each
of the tributary sites indicated on the map (page v), except for the
high runoff months of February and March when two samples were collected,
Sampling was begun in May, 1973, and was completed in April, 1974.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Pennsylvania 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-
pled "minor tributaries and immediate drainage" ("II" of U.S.G.S.) were
estimated using the means of the nutrient loads, in kg/km2/year, at sta-
tions B-l and C-l and multiplying the means by the II area in km2.
Other than septic tanks, there were no known point sources impact-
ing Still water Lake during the Survey sampling year.
* See Working Paper No. 175.
-------
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total^
a. Tributaries (non-point load) -
Unnamed Stream (B-1) 110 31.0
Hawkey Run 115 32.4
b. Minor tributaries & immediate
drainage (non-point load) - 100 28.2
c. Known municipal STP's - None
d. Septic tanks* - 5 1.4
e. Known industrial - None
f. Direct precipitation** - 25 7.0
Total 355 100.0
2. Outputs -
Lake outlet - Upper Tunkhannock
Creek 355
3. Net annual P accumulation - none
* Estimate based on 10 lakeshore dwellings; see Working Paper No. 175,
** See Working Paper No. 175.
-------
10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Unnamed Stream (B-l) 5,190 27.1
Hawkey Run 7,140 37.3
b. Minor tributaries & immediate
drainage (non-point load) - 5,205 27.2
c. Known municipal STP's - None
d. Septic tanks* - 105 0.5
e. Known industrial - None
f. Direct precipitation** - 1.520 7.9
Total 19,160 100.0
2. Outputs -
Lake outlet - Upper Tunkhannock
Creek 13,820
3. Net annual N accumulation - 5,340 kg.
* Estimate based on 10 lakeshore dwellings; see Working Paper No. 175.
** See Working Paper No. 175.
-------
11
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Unnamed Stream (B-l) 12 583
Hawkey Run 8 479
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those proposed by Vollenweider (Vollen-
weider and Dillon, 1974). 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 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 0.25 none 13.6 3.8
Vollenweider loading rates for phosphorus
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Stillwater Lake:
"Dangerous" (eutrophic rate) 0.76
"Permissible" (oligotrophic rate) 0.38
-------
12
V. LITERATURE REVIEWED
Ulanoski, James, 1975. Personal communication (lake morphemetry).
PA Dept. of Env. Resources, Harrisburg.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophlcation research.
Natl. Res.,Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
-------
13
VII. APPENDICES
APPENDIX A
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x 10"4 = 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
-------
APPENDIX B
LAKE RANKINGS
-------
LAKES RANKED BY INDEX IMOS.
RANK LAKE CODE LAKE NAME
1 4224
2 4220
3 4222
4 4228
5 4227
6 4223
7 3641
8 4229
9 4221
10 4219
11 4204
12 4226
13 4213
14 4216
15 4225
16 4201
17 4207
LAKE NAOMI
BELTZVILLE 0AM
HARVEY'S LAKE
STILLWATER LAKE
POCONO LAKE
INDIAN LAKE
ALLEGHENY RESERVOIR
LAKE WALLENPAUPACK
CANADOHTA LAKE
BEAVER RUN RESERVOIR
CONNEAUT LAKE
PINCHOT LAKE
PYMATUNING RESERVOIR
SHENANGO RIVER RESERVOIR
ONTELAUNEE DAM
BLANCHARD RESERVOIR
GREENLANE 0AM
INDEX NO
445
423
413
401
389
383
385
371
369
360
307
256
206
157
101
85
53
-------
PERCENT OF LAKES WITrl rilGHEH VALUES (NUMBER OF LAKES wITH HICiHEK VALUES)
LAKE
CODE LAKE NAME
3t>4l ALLEGHENY RESERVOIR
4201 6LANCHARO RESERVOIR
4204 CONNEAUT LAKE
4207 GREENLANE DAM
4213 PYMATUNING RESEHV01K
4216 SHENANGO RIVErt RESERVOIR
4219 BEAVER RUN RESERVOIR
4220 BELTZVILLE 0AM
4221 CANADOHTA LAKE
4222 HARVEY'S LAKE
4223 INDIAN LAKE
4224 LAKE NAOMI
4225 ONTELAUNEE DAM
4226 PINCHOT LAKE
4227 POCO'NO LAKE
4228 STILLWATE* LAKE
4229 LAKE WALLENPAUPACK
MEDIAN
TOTAL P
56 (
13 <
44 <
6 <
0 (
19 (
94 (
88 (
50 <
63 (
100 (
81 <
25 <
31 (
38 (
72 (
72 (
9)
2)
7)
1)
0)
3)
15)
14)
8)
10)
16)
13)
4)
5)
6)
11)
11)
MEDIAN
1NOHG N ,
38
13
63
6
72
44
19
25
97
81
31
88
0
56
97
72
50
< 6)
< 2)
( 10)
( 1)
( 11)
< 7)
( 3)
( 4)
( 15)
( 13)
( 5)
( 14)
( 0)
( 9)
< 15)
< 11)
( 8)
500-
MEAN SEC
63 (
25 (
69 <
19 <
6 (
13 (
88 (
94 I
56 (
100 (
75 £
44 (
0 (
31 <
SO (
38 (
81 (
10)
4)
11)
3)
1)
2)
14)
15)
9)
16)
12)
7)
0)
5)
8)
6)
13)
MEAN
CHLORA
100
31
56
13
0
6
81
94
19
63
75
69
44
38
H8
25
SO
( 16)
< 5)
{ 9)
( 2)
( 0)
( 1)
< 13)
I IS)
( 3)
( 10)
( 12)
( 11)
( 7)
( 6)
( 14)
( 4)
( 8)
15-
MIN DO
69 (
3 (
34 (
3 (
100 (
47 I
19 t
34 (
59 I
47 (
19 (
88 (
19 (
Bl (
75 (
94 (
59 (
11)
0)
5)
0)
16)
7)
2)
5)
9)
7)
2)
14)
2)
13)
12)
15)
9)
MEDIAN
01SS H
. 59 <
0 (
41 (
6 <
28 <
28 (
59 (
88 (
86 (
59 (
88 1
75 (
13 (
19 (
41 (
100 (
59 {
8)
0)
6)
1)
4)
4)
8)
13)
13)
8)
13)
12)
2)
3)
6)
16)
8)
INDEX
NO
385
85
307
53
206
157
360
423
369
413
38S
445
101
256
389
401
371
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
36*. 1 ALLEGHENY RESERVOIR
4201 BLANCHARD RESERVOIR
4204 CUNNEAUT LAKE
42Q7 GKEENLANE DAM
4213 PYMATUNING RESEKVOIR
4216 SHENANGO RIVER RESERVOIR
4219 BEAVER RUN RESERVOIH
4220 6ELTZVILLE 0AM
4221 CANAOOHTA LAKE
4222 HARVEY'S LAKE
4233 INDIAN LAKE
4224 LAKE.NAOMI
4225 ONTELAUNEE 0AM
4226 PINCriOT LAKE
4227 POCONO LAKE
4228 STILLWATER LAKE
4229 LAKE WALLENPAUPACK
MEDIAN
TOTAL P
0.016
0.064
0.023
0.066
0.070
0.058
0.009
0.010
0.020
0,015
0.008
0.014
0.040
0.027
0.024
0.015
0.015
MLUIAN
INOKG N
0.380
1.300
O.ltiS
1.475
0.180
0.340'
0.835
0.615
0.130
0,160
0.520
0.135
2.150
0.245
0.130
0.180
0.250
500-
K£AN SEC
41^.250
453.143
402.000
460.222
467.750
•463. b55
384. W33
362,444
436.000
338.000
400.222
443.333
470.667
453.000
438.800
449.000
394.583
MEAN
CHLOHIA
3.700
15.187
7.56?
24.011
56.333
26.bOO
5.183
4.b56
15.167
5.967
5.211
5.533
11.783
13.950
4.980
18.233
9.617
15-
MIN DO
13.800
14.900
14.600
14.900
7,700
14.500
I4,aoo
14.600
14.100
14.500
14.800
8.000
14.800
11.500
13.200
7.900
14.100
MEDIAN
DISS P
0.006
0.046
0.007
0.020
0.008
0.008
O.OOb
0.005
0.005
0.006
0.005
0.005
0.011
O.OOb
0.007
0.004
0.006
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
f-LO* INFORMATION FUK Hti\NSrH/AI»IA
1/27/75
LAKE CODE 4/>28 aTlLLWrtTt« LAKE
TOTAL QWAINAGE AKEA OF LAKEISU KHt
35.0
SUfl-OKAINA&t
TRIBUTARY AntEAlSCJ KM)
33.0
8.9
1^.9
1 1.2
4228BJ
422HC1
NOKi-IALIZED FLO*b(CHS)
Ftd
O.Ort
J.15
0.31
0.2?
MftH
1.03
0.28
U.Dl
G.2b
APR
1.16
U.37
O.b7
0.23
MAlf JUN
O.farf 0.59
0.23 0.12
0.42 0.27
U.82 0.20
JUL
0.51
0.09
0.22
0.20
AU(i
J.45
O.OU
0.19
(1.18
SD>
0.31
0.04
0.12
0.14
OCT
0.42
0.07
0.18
0.18
MOV
0.60
0.14
o.2a
0.25
DEC
0.76
0.17
0.34
0.25
MEAN
0.68
0.16
0.31
0.22
JAN
U.2E.
TOTAL UKAINAbE AKtA OF LAKt =
SUM UF bOb-OKAlNAGt AKEAb =
MEAN MONTHLf FLUwb ANO UA1LY FLOWS(CMb)
THIBUTAhY MONTH YtAK MtAN fLQ:4 LlflV
7
a
10
11
12
1
2
3
7
8
9
10
1 1
1?
1
3
it
7J
73
73
73
73
73
73
7-4
74
73
73
73
/J
73
73
73
74
74
74
74
1.33
l.ol
0.62
O.S4
u .3/
0.4u
O.bl
1 .^S
1.10
O.f<2
1 .i,-^
1 . Jj
y.37
0.31 '
0. IS
0. 10
C .L.'J
U. Jb
0.09
0 .d8
0.2B
O.ll
0 .2d
u . 34
19
23
14
4
b
13
10
8
12
9
Ifo
1J
IV
23
14
<*
H
|3
lu
b
12
•;
Ib
13
SUMMARY
Jb.O
Jb.O
TOTAL FLO* IN =
(UTAL FLO^ OUT =
Id
tLOti UAY
1. /&
0 .52
0.71
i.lo
0.42
l.tj*
0. 7v
u.bl
1.03
1.23
0.37
0. 13
0. Jl
0.03
U. J /
u.bl
J.I/
u.Od
0.26
0.34
FLUfi LiAV
FLO*
-------
KLOri IKFOKMATION FOK PENNSYLVANIA
1/37/75
LAKE COOE 4?28
STILLWATER
MEAN MONTHLY FLOWS AND uAILY FLOWS(CMS)
TRIBUTARY
4228C1
422BZZ
MONTH YEAr<
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
?
3
4
73
73
73
73
73
73
73
73
7*
74
74
7<*
73
7J
73
73
73
73
73
73
74
74
74
74
MEAN FLO* DAY
0.57
0.74
0.34
0.23
0.15
0.16
0.21
0.88
0.48
0.34
0.48
0.57
0.34
0.54
0.34
0.22
0.17
0.17
0. 19
0.65
0.40
0.26
0.40
U.40
19
23
14
4
8
13
10
8
12
9
16
13
19
23
14
4
8
13
10
8
12
9
16
13
FLOW DAY
0.79
0.26
0.31
0.51
0.09
0.11
0.17
0.74
0.34
0.20
0.45
O.S4
0.45
0.21
0.28
a.45
0.11
0.12
0.16
U.54
0.2S
0.16
0.34
0.37
FLOW DAY
FLOW
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORtT RETRIEVAL DATE 75/01/27
422801
11 07 05.0 075 85 10.0
STILLWATER LAKE
42089 PENNSYLVANIA
oooio
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
73/04/17 11 05 0000 10.0
73/07/23 10 45 0000 22.9
73/10/03 16 15 0000 17.1
00300 J0077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
10.7
7.1
8.8
60
60
33
58
33
30
lltPALES
3
00400
PH
SU
7.80
5.20
6.10
00410
T ALK
CAC03
MO/L
10K
10K
10K
2111202
0005 FEET DEPTH
00610
NH3-N
TOTAL
MG/L
(j.040
0.110
O.OSO
00625
TOT KJEL
N
MG/L
0.500
0.500
0.600
00630
N02S.N03
N-TOTAL
MG/L
0.140
0.070
0.030
00671
PHOS-DIS
ORTHO
MG/L P
0.007
0.004
0.004
DATE TIME DEPTH
FROM OF
TO DAY FEET
73/04/17 11 05 0000
73/07/23 10 45 0000
73/10/03 16 15 0000
0665
S-TOT
/L P
0.015
0.016
0.015
32217
CHLRPHfL
A
LJG/L
42.2
5.8
6.7
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STOtVET RETRIEVAL DATE 75/02/03
4228A1
41 J7 02.0 075 25 Jl.O
UPPER TUKKHANNOCK LAKE
42089 7.5 POCONO PINES
0/STILLWATER LAKE
S£C HO B«L)G BtLOW QAM
11EPALES 2
4 0000 FEET
DATE
FROM
TO
7J/05/19
73/06/23
73/07/14
73/08/05
73/09/09
73/10/07
73/11/11
73/12/09
74/01/06
74/02/09
74/02/23
74/03/16
74/03/30
74/04/13
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
15
10
10
10
10
11
13
11
10
14
!<•
09
12
11
15
05
05
30
00
00
10
45
06
00
25
45
30
35
MG/L
0.
d.
0.
0.
0.
0.
0.
0.
0.
0.
u.
a.
0.
0.
052
017
017
010K
010K
010K
052
096
140
148
200
152
136
112
MG/L
0.
0.
1.
0.
0.
u.
0.
0.
0.
0.
0.
0.
0.
0.
320
460
000
260
480
300
800
400
200
300
300
500
600
300
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
.005K
.038
.210
.022
.029
.019
.034
.020
.028
.065
.020
.025
.060
.015
MG/L
0.
0.
0.
0.
0.
0.
0.
o.
o.
0.
0.
0.
0.
p
005K
006
014
005K
005K
006
005K
005K
005K
015
005
005
005K
MG/L P
0.015
U.U20
0.015
0.015
0.015
0.010
0.020
0.015
0.010
0.010
0.025
0,025
O.J15
0.020
DEPTH
K VALUE KNOWN TO dE
LESS THAN INDICATED
-------
STOrtET KETRIEVAL DATE 7b/02/i>3
422bdl
41 07 16.0 075 24 13.0
UNNAMED CREEK
42 7.5 POCONO PINES
T/STILLWATER LAKE
CULVErtT ON QNDRY RD AT E END OF LAKE
11EPALES 2111204
4 0000 FEET DEPTH
DATt
FKOM
TO
73/05/19
73/06/23
73/07/14
73/08/05
73/09/09
73/10/07
73/11/11
73/12/09
74/01/06
74/02/09
74/02/23
74/03/16
74/03/30
74/04/13
00t>30 00625
TIME DEPTH iM02^N03 TOT KJEL
OF N-TOTAL N
DAY FEET
14 45
10 00
09 15
09 50
09 30
10 30
12 50
11 30
09 40
13 50
13 50
11 00
15 00
10 00
MG/L
0.060
0.052
0.013
0.010K
0.028
0.016
0.044
0.112
0.160
0.16S
0.216
0.148
0.108
0.076
MG/L
0.380
0.960
0.920
0.850
2.400
0.700
1.050
0.600
0.900
2.000
0.500
0.400
1.300
0.400
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.021
0.046
0.231
0.026
0.126
0.040
0.044
0.036
0.044
0.115
0.035
0.030
0.065
0.020
MG/L P
0.005K
0.011
0.014
0.005K
0.009
0.006
0.012
0.005K
0.005K
0.005
0.015
0.010
0.005K
0.005K
MG/L P
O.Olb
0.030
0.025
0.030
0.035
0.020
0.030
0.015
0.010
0.015
0.025
0.025
0.010
0.015
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
iTOKET RETRIEVAL DATE 75/02/03
4228C1
41 07 40.0 075 24 10.0
HA*KEY RUN
42 7.B TOSYHANNA
TYSTILLWATER LAKE
FOREST LAME BHOG AT NE TIP OF LAKE
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/05/19
73/06/23
73/07/1*
73/08/05
73/09/09
73/10/07
73/U/ll
73/12/09
74/01/06
74/02/09
74/02/23
74/03/16
74/03/30
74/0<*/13
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
15 00
10 10
09 20
10 00
09 35
10 40
12 55
11 25
09 45
1<+ 00
14 00
11 45
12 15
10 05
MG/L
0.176
0.168
O.lOb
0.115
0.189
0.140
0.240
0.200
0.312
0.320
0.288
0.252
0.264
0.224
MG/L
0.425
0.250
o.eoo
0.160
2.150
0.350
1.000
0.300
0.100K
0.200
0.700
0.400
0.400
0.100
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL OrtTHO
MG/L
0.059
0.038
0.210
0.015
0.080
0.026
0.028
0.020
0.008
0.015
0.050
0.030
0.040
0.010
MG/L P
0.005K
0.005K
0.010
0.005K
0.005K
0.005K
0.008
O.OOSK
0.005K
0.010
0*005K
0.005
0.005K
0.005K
MG/L P
0.010
0.010
0.010
0.015
O.OObK
0.005K
0.008
0.010
0.005K
0.030
0.025
0.005
0.005
0.015
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |