U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
EAST OAKWOOD LAKE
BROKINGS COUNTY
SOUTH DAMQTA
EPA REGION VI11
WORKING PAPER No, 615
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-&G. P.O. 699-440
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REPORT
ON
EAST QAKWOQD LAKE
BROKINGS COUNTY
SOUTH DMDTA
EPA REGION VI11
WORKING PAPER No, 615
VilTH THE COOPERATION OF THE
SOUTH DAKOTA DEPARTMENT OF ENVIRONMENTAL PROTECTION
AND THE
SOUTH DAKOTA NATIONAL GUARD
JANUARY/ 1977
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1
CONTENTS
Page
Foreward ii
List of South Dakota Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 1
UI. Lake Water Quality Sumary 3
IV. Nutrient Loadings 4
V. Literature Reviewed 8
VI. Appendices 9
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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 freshwater 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 [ 3O3(e)], water
quality criteria/standards review [ 3O3(c)], clean lakes [ 314(a,b)],
and water quality monitoring [ lO6 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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11•1
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
freshwater 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 South Dakota Departments of
Environmental Protection and Game, Fish and Parks for professional
involvement, to the South Dakota National Guard for conducting the
tributary sampling phase of the Survey, and to those wastewater
treatment plant operators who voluntarily provided effluent samples.
Allyn Lockner, Secretary, and Blame Barker and Duane Murphy,
Department of Environmental Quality; Douglas Hansen, Department
of Game, Fish and Parks; and James Hayden, Director, State Lakes
Preservation Committee 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 Duane L. Corning, the Adjutant General of South
Dakota, and Project Officer Colonel Robert D. Chalberg, who directed
the volunteer efforts of the South Dakota National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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lv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF SOUTH DAKOTA
LAKE NAME COUNTY
Albert Kingsbury
Alvin Lincoln
Angostura Fall River
Brant Lake
Byron Beadle
Clear Marshall
Clear Minnehaha
Cochrane Deuel
Cottonwood Spink
Deerfield Pennington
Enemy Swim Day
Herman Lake
John Hamljn
Kampeska Codington
Madison Lake
Mitchell Davidson
Norden Hamlin
East Oakwood Brookings
West Oakwood Brookings
Pactola Pennington
Pickerel Day
Poinsett Brookings, Lake
Red Iron South Marshall
Richmond Brown
Roy Marshall
Sand Brown
Sheridan Pennington
Stockdale Custer
East Vermilflon McCook
Wall Minnehaha
Waubay Day
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9705
1••
/
97 00’
OAK WOOD LAKES
® Tributary Sampling Site
X Lake Sampling Site
o 1 2 3 4Km.
I I I
o 1 2Mi.
Scale
9655
44 30-
I
/
Moirtjme,
Slough
Map Location
)
. 1
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EAST OAKWOOD LAKE
STORET NO. 4618
I. INTRODUCTION
East Oakwood Lake was included in the National Eutrophication Survey
as a water body of special interest to the South Dakota Departments of
Environmental Protection and Game, Fish and Parks. Tributaries and
nutrient sources were not sampled, and this report relates only to the
lake sampling data.
II. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that East Oakwood Lake is eutrophic.
It ranked twenty-second in overall trophic quality when the 31
South Dakota lakes sampled in 1974 were compared using a com-
bination of six parameters*. Fourteen of the lakes had less
median total phosphorus, three had less and two had the same
median dissolved orthophosphorus, 25 had less median thorganic
nitrogen and mean chlorophyll a, and 24 had greater mean Secchi
disc transparency.
Survey limnologists noted heavy algal blooms in July and
September.
B. Rate—Limiting Nutrient:
The algal assay results show that East Oakwood Lake was limited
by phosphorus at the time the sample was collected (04/23/74). The
* See Appendix A.
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2
lake data indicate phosphorus limitation in April but
nitrogen limitation at the other sampling times (07/12/74
and 09/20/74).
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3
111. LAKE AND DRAINAGE BASIN CHARACTERISTICSt
A. Lake Morphometrytt:
1. Surface area: 4.05 kilometers 2 .
2. Mean depth: 1.5 meters.
3. Maximum depth: 2.7 meters.
4. Volume: 6.075 x l0 m 3 .
B. Precipitation*:
1. Year of sampling: 37.2 centimeters.
2. Mean annual: 56.2 centimeters.
t Table of metric equivalents--Appendix B.
tt Murphey, 1974.
* See Working Paper No. 175, “...Survey Methods, 1973-1976”.
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4
IV. LAKE WATER QUALITY SUMMARY
East Oakwood Lake was sampled three times during the open-water season
of 1974 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from
two stations on the lake and from two depths at each station (see
map, page v). During each visit, a single depth—integrated (near
bottom to surface) sample was composited from the stations for phyto-
plankton 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 depth
sampled at each station was 1.5 meters.
The sampling results are presented in full in Appendix C and
are summarized in the following table.
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A. SUMMARY OF PP4YSICAL AND ChEMICAL CpiARACTEp ISTIC5 FOR OAKW000
STU ET CODE 4618
1ST SAMPLING ( 4/23/74)
2 SITES
LAiCE EAST
2ND SAMPLING ( 7/12/741
2 SITES
3. U SAMPLING ( /20/7i.)
2 SITES
PARAMETER
RANGE
MEAN
MEDIAN
I ANGE
MEAN
MEUJAN
RANGE
MEAN
MEDIAN
TEMP (C)
9.8
— 10.2
10.0
9.9
24.7
— 26.’.
25.5
25.5
15.9
— 16. ’.
16.1
16.1
DISS OXY (MG/L)
11.0
— 11.4
11.2
11.2
5.0
— 12.0
7.8
7.0
7.6
— 8.
8.0
9.1
CNDCTVY (MCROMO)
563.
— 687.
626.
628.
1270.
— 1305.
1281.
1274.
1010.
— 1019.
1015.
1015.
PM SVAND UNITS)
8.4
— 8.5
8.5
8.5
8.8
— 9.1
9.0
9.0
8.4
— 8.5
8.5
8.5
TOT *1K (MG/U
193.
— 198.
1%.
195.
154.
— 169.
160.
158.
153.
— 156.
155.
155.
TOT P CMG/L)
0.134
— 0.151
0.144
0.14o
0.169
— 0.242
0.202
0.198
0.1 0
— 0.144
0.129
0.126
ORTHO P (MG/I)
0.007
— 0.009
0.008
0.008
0.0 1
— 0.040
0.032
0.034
0.006
— 0.011
0.008
0,oo
N02.N03 (MG/L)
0.190
— 0.220
0.205
0.205
0.070
— 0.160
0.102
0.090
0.020
— 0.080
0.035
0.O o
AMMONIA (MG/U
1.240
— 1.410
1.340
1.355
0.080
— 0.130
0.095
0.085
0.040
— 0.050
0.042
0.040
KJEL N (MG/L)
4.200
6.800
4.975
4.450
2.800
— 3.100
2.975
3.000
4.100
— 4.500
4.350
4.400
JNORG N (MG/I)
1.460
— 1.600
1.545
1.560
0.150
— 0.290
0.191
0.175
0.060
— 0.130
0.077
0.060
TOTAL N (MG/L)
‘..420
— 7.010
5.180
4.64
2.900
— .1.260
3.077
3.075
4.180
— 4.520
4.385
4.420
CHLRPYL A (UG/L)
30.3
— 35.5
32.9
32.9
136.4
— 197.9
167.1
167.1
110.9
— 170.6
140.7
140.7
SECC iI (METERS)
0.3
— 0.3
0.3
0.3
0.4
— 0.4
0.4
0.4
(I
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6
B. Biological characteristics:
1. Phytoplankton -
Sampling Dominant Algal Units
Date Genera per ml
1. Fragilaria
2. Flagellates
3. Merismopedia .
4. Ankistrodesmus p.
5. Lyngbya —
Other genera _______
1. Aphanocapsa 8,821
2. Mèrismopedia .p. 6,829
3. Lyngbya E• 6 1 )46
4. Fragilaria p. 4,268
5. Phormidium . 2• 3,486
Other genera 12,235
41 ,685
1. Anabaenopsis . 77,640
2. Lyngbya . 10,881
3. Oscillatoria 7,352
4. Aplianothece . 2,353
5. itzschia 2,059
Other genera 3,235
103,520
2. Chlorophyll a —
Sampling Station Chlorophyll a
Date Number ( igLi )
04/23/74 1 30.3
2 35.5
1 197.9
2 136.4
1 170.6
110.9
04/23/74
07/12/74
09/20/74
8,323
6,087
4,596
2,485
2,236
9,690
33,417
Total
Total
Total
07/12/74
09/20/74
2
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7
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N
Spike (mg/i) Conc. (mg/i) Conc. (mg/i )
Control 0.025 1.358
0.050 P 0.075 1.358
0.050 P + 1.0 N 0.075 2.358
1.0 N 0.025 2.358
2. Discussion —
Maximum yield
( mg/i-dry wt. )
6.1
9.1
15.8
7.1
The control yield of the assay alga, Selenastrum c pri-
cornutum , indicates that the potential primary productivity
of East Oakwood Lake was high at the tine the sample was
collected (04/23/74). Also, a 50% increase in yield with
the addition of phosphorus alone indicates that the lake
was limited by phosphorus at that time. Note that the
addition of nitrogen alone resulted in a yield not significantly
greater than that of the control.
The lake data indicate phosphorus limitation in April;
i.e., the mean inorganic nitrogen/orthophosphorus ratio was
193/1. However, nitrogen limitation is indicated in July
and September; i.e., mean inorganic nitrogen/orthophosphorus
ratios were 10/1 or less, and nitrogen limitation would be
expected.
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8
V. LITERATURE REVIEWED
Murphey, Duane G., 1974. Personal cornunication (lake morphometry).
SD Dept. of Env. Prot., Pierre.
Petri, Lester R., and L. Rodney Larson, 1966(?). Quality of water
in selected lakes of eastern South Dakota. Rept. of mv. #1,
SD Water Re5. Corn., Pierre.
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9
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAcE DATA TO BE USED IN PANKINGS
LAKE MEDIAN MEDIAN 500— MEAN 15— MEDIAN
CODE LAKE NAME TOTAL P INO G N MEAN SEC CHLOPA MIN DO OISSORTp1C I
460 LA’ E ALBE T 0.321 0.170 439.111 106.289 9.200 0.019
4602 ALVIN LAKE 0.067 0.970 442.833 4.700 9.400 0.017
4603 A iGOSTURA RESERVOIR 0.019 0.160 423.333 3.717 13.000 0.005
4604 BPANT LAKE 0.194 0.130 432.833 34.150 11.800 0.113
4605 LAKE. BYRON 0.443 0.370 488.333 149.350 9.000 0.146
4606 CLEAR LAKE 0.027 0.075 430.167 11.983 8.800 0.0 9
4607 CLEAR LAKE 1.400 0.270 495.333 691.000 7.000 0.468
4603 COCHRANE LAKE 0.037 0.150 446.000 15.683 15.000 0.008
4609 COTTONWOOD LAKE 0.685 0.265 490.333 112.017 8.600 0.417
4610 DEERFIELD RESERVOIR 0.033 0.080 303.333 3.650 15.000 0.022
4611 ENEMY SWIM LAKE 0.037 0.085 442.600 14.200 8.200 0.013
4612 LAKE HERMAN 0.340 0.155 485.000 58.733 8.600 0.174
4613 ST JOHN LAKE 0.34B 0.080 489.400 120.880 9.800 0.025
4614 LAKE KAP4PESKA 0.220 0.105 468.889 20.567 8.200 0.128
4615 MADISON LAKE 0.25 445.555 22.578 14.000 0.107
4616 LAKE MITCHELL 0.099 0.085 465.833 14.883 13.800 0.015
‘.617 LAKE NOPD(N 0.256 0.165 488.667 46.800 10.000 0.050
4618 OMW000 LAKE: EAST 0.146 0.175 487.000 113.600 10.000 0.009
4619 OAK OOQ LAKE WEST 0.181 0.135 485,833 159.667 9.600 0.021
4620 PACTOLA RESERVOIR 0.011 0.070 248.444 1.478 11.000 0.006
4621 PICKEREL LAKE 0.049 0.095 439.833 15.833 9.600 0.009
4622 LAKE POINSETT 0.115 0.315 468.444 40.211 10.000 0.023
4623 LAKE RED I WN SOUTH 0.042 0.110 430.333 6.883 7.600 0.010
462’. RICHMO ’JD LAKE 0.187 0.150 410.000 18.467 10.000 0.144
4625 ROY LAKE 0.034 0.070 431.000 13.333 11.000 0.010
4626 SAND LAKE 0.489 0.110 471.800 65.790 12.800 0.288
4627 SHERIDAN LAKE 0.053 0.105 394.000 15.433 15.000 0.016
TOCKAOF lAKE 0.233 0.150 432.000 25.400 15.000 0.109
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LA’(E
OATA
TO BE USED
IN RANKINGS
LAKE
CODE
LAKE
NAME
MEDIAN
TOTAL
P
MEDIAN
INORG
N
500—
MEAN SEC
MEAN
CHLO A
15—
14 1N DO
MEDIAN
DISS O T iO
P
4629
LA’ E
VERMILLION
0.211
0.100
472.833
100.800
9.200
0.092
4630
WALL
LAI E
0.194
0.160
441.667
55.267
7.4o
0.076
4631
WAU AY LAKE NORTH
0.09a
0.145
469.555
127.033
11.400
0.023
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PERCENT OF LAKES WITH HIGHER VALUES fNUMBER OF LAKES WITH HIGHER VALUES)
MEDIAN MEDIAN 500 MEAN 15— MEDiAN INDEX
CODE LAKE NAME TOTAL P INORG N MEAN SEC CIILORA MIN 00 DISS ORTHO P NO
4631 LAKE ALBEPT 20 ( 6) 20 ( 6) 10 C 3) 23 C 7) 68 C 20) 60 18) 201
4602 ALVIN LAKE 67 C 20) 0 C 0) 57 C 17) 90 C 27) 63 C 19) 63 C 19) 3’.O
4603 ANGOSTURA RESE VOIP 97 C 29) 30 C 9) 87 1 26) 93 C 28) 20 C 6) 100 i 30) 427
4604 BRANT LAKE 40 ( 12) 53 I 16) 70 C 21) 47 1 14) 27 C 8) 23 C 7) 260
4605 LAKE BYRON 10 ( 3) 3 C 1) 17 C 5) 7 1 2) 73 C 22) 13 1 4) 123
4606 CLEAR LAKE 93 C 28) 93 ( 28) 83 C 25) 83 C 25) 77 C 23) 90 C 2?) 51
4607 CLEAR LAKE 0 C 0) 10 C 3) 0 C 0) 0 1 0) 100 1 30) 0 ( 0) 110
4608 COCrIRANE LAKE 83 1 25) 40 C 11) 50 C 15) 67 C 20) 5 C 0) 93 C 28) 338
4609 COTTONwOOD LAKE 3 C 1) 13 ( 4) 3 1 1) 20 C 6) 82 1 24) 3 C 1) 124
4610 DEERFIELD RESERVO1 I 90 C 27) 88 1 26) 97 C 29) 97 C 29) 5 1 0) 53 1 16) 430
4611 ENEMY SWIM LAKE 80 1 24) 82 C 24) 60 C 18) 77 C 23) 88 C 26) 73 1 22) 460
4612 LAKE HERMAN 17 C 5) 33 C 10) 27 C 8) 33 C 10) 82 ( 24) 10 1 3) 202
4613 ST JOHN LAKE 13 C 4) 88 ( 26) 7 C 2) 13 C 4) 53 1 16) 43 1 13) 217
4614 LAKE KAP4PESKA 33 C 10) 65 C 19) 40 1 12) 57 C 17) 88 1 26) 20 C 6) 303
4615 MADISON LAKE 27 1 8) 77 C 23) 53 1 16) 53 1 16) 13 1 4) 30 C 9) 23
4616 LAKE MITCHELL 60 C 18) 82 C 24) 47 C 14) 73 C 22) 17 ( 5) 70 1 21) 349
4617 LAKE NOROEN 23 C 7) 23 C 7) 13 ( 4) 40 C 12) 45 C 12) 40 C 12) 184
4618 OA OOD LAKE EAST 53 C 16) 17 ( 5) 20 C 6) 17 C 5) 45 1 12) 85 1 25) 237
4619 OAKW000 LAKE WEST 50 1 15) 50 C 15) 23 1 7) 3 C 1) 58 1 17) 57 1 17) 241
4620 PACTOLA RESERVOIR 100 C 30) 9R C 29) 100 C 30) 100 C 30) 35 C 10) 97 1 29) 530
4621 PICKEREL LAKE 73 C 22) 73 C 22) 67 C 20) 63 C 19) 58 C 17) 85 ( 25) 419
4622 LAKE POINSETT 57 C 17) 7 C 2) 43 1 13) 43 I 13) 45 C 12) 47 ( 14) 242
4623 LAKE RED IRON SOUTH 77 1 23) 58 C 17) 80 C 24) 87 1 26) 93 C 28) 78 ( 23) 413
4624 RICHMOND LAKE 47 C 14) ‘ .0 C 11) 90 C 27) 60 1 18) 45 C 12) 17 1 5) 299
4625 ROY LAKE 87 I 26) 98 C 29) 77 C 23) 80 C 24) 35 1 10) 78 1 23) 455
4626 SAND LAKE 7 C 2) 58 C 17) 33 C 10) 30 C 9) 23 C 7) 7 1 2) 158
4627 SHERIDAN LAKE 70 C 21) 65 C 19) 93 C 26) 70 1 21) 5 C 0) 67 1 20) 370
‘8 -- KA 1 CE o 1 7: ) C 0 27 ) 25
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PEQCENT OF LA (S WITH HIGHER VALUES u iuMaER OF LAKES WITH HIGHEW VALUES)
LAKE MEDIAN MEDIAN 500— rtEAN IS— MEDIAN INDEX
CODE LAKE NAME TOTAL P IUORG N MEAN SEC CPILORA II1N DO DISS ORTrIO P NO
4629 LAKE VERMILLION 37 ( 11) 70 ( 21) 30 ( 9) 27 8) 68 ( 20) 33 ( 10) 265
4630 WALL LAKE 43 C 13) 27 C 8) 63 C 19) 37 ( 11) 97 C 29) 37 C 11) 304
4631 WAUBAY LAKE NORTH 63 C 19) 47 C 14) 37 C 1) 10 C 3) 30 C 9) 50 C 15) 237
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LAKES RANKED BY INDEX NOS,
RANK LAKE CODE LAKE NAME INDEX NO
1 4 Q PACTOLA RESERVOIR 530
2 4606 CLEAR LAKE 519
3 4623 LAKE RED IRON SOuTH
4 4611 ENEMY SWIM LAKE 460
5 4625 ROY LAKE 455
4610 DEERFIELD RESERVOIR 430
7 4603 ANGOSTURA RESERVOIR 427
8 4621 PICKEREL LAKE 419
9 4627 SHERIDAN LAKE 370
10 4616 LAKE MITCHELL 349
11 4b02 ALVIN LAKE 340
12 4608 COCHRANE LAKE 338
13 4630 WALL LAKE 304
14 4614 LAKE KAMPESKA 303
15 4624 RICHMOND LAKE 299
16 4629 LAKE VERMILLION 265
17 4604 BRANT LAKE 260
18 4615 MADISON LAKE 253
19 4622 LAKE POINSETT 242
20 4619 OA,cW000 LAKE WEST 241
21 4631 WAU8AY LAKE NOHTH 237
22 4618 OAKWOOD LAKE EAST 237
23 4628 STOCKADE LAKE 225
24 4613 ST JOHN LAKE 217
25 4612 LAKE HERMAN 202
26 4601 LAKE ALBERT 201
27 ‘t6l 7 LAKE NORDEN 184
A I cA
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LA(E5 RANKED BY INDEX 1OS.
RANc LAIcE CODE LAr¼E NAME INDEX NO
9 4609 COTTuNWOO LAKE 124
30 4605 LAKE BYRON 123
31 4b 7 CLEAR LAKE 110
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APPENDIX B
CON VERSI ON FACTORS
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CONVERSION FACTORS
Hectares x 2.471 acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x = 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 lbs/square mile
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APPENDIX C
PHYSICAL and CHEMICAL DATA
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STC’ ET r E1 1EvAL , iE 7 /1k/25
4 6J 802
k 40.0 096 58 15.0
OA u0O LAKE .AST
‘.b3}1 SOOT-, DAKOTA
lit. i? ML ES
4
2111202
0007 F .ET DEPTrI
74/04/ 3 jF, 00 000u
16 00 0005
74/07/12 j4 55 0000
14 55 0005
74/09/20 10 00 0000
10 00 0002
10 00 0003
( .Jb6 32217
Pi-iOS—IOT CHLRPhYL
A
MG/L P UG/L
U. 1 3’.
0.180
.2l6
3.120
•).132
00031
INCOT LT
REMNING
PERCLNT
UAT .
rIMs
JE T-i
F QM
OF
TO
FEET
74/04/23
15 00
16 00
0000
0005
74/07/12
14 55
I 55
0000
00u5
14/O /2O
10 00
10 00
u030
0002
DArE
TIME
Q TH
FROM
UE
to
DAY
FEET
j )I’)
O O3vO
.p)u77
00094
fl0400
00410
00610
00625
00630
00671
•‘AT?J .
CD
1s i5P
C’nIJuCTV
PH
T ALI(
NH3—N
TOT KJEL
N02&N03
PiiOS—DIS
T .Ar
SECCt41
rIFLO
CACO3
TOTAL
N
N—TOTAL
ORIrlO
C t . JT
MG/L
INCrIES
!1TCROMHO
SU
Mu/L
M /L
MG/L
M(,/L
MG/L P
IC.2
12
83
s.5Q
193
1.380
6.800
0.210
0.007
10.1
11.4
672
8.45
196
1.410
4.600
0.190
0.009
26.1
.0
16
1277
9.10
161
0.080
3.000
0.070
0.021
24.8
6.0
127t)
d.80
154
0.130
3.100
0.160
0.040
15.
.2
42
1010
8.46
1 56
U.U’.0
4.500
0.020K
0.006
I5.
‘4.2
1010
8.46
156
0.040
4.400
0.020’c
0.007
35.5
1 3e ,4
110.9
1.0
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
‘.6’ 01
4 ’. 2 00.0 . 1db d 0(1.0
OAc .,Z ) LAKE E 5T
4b011 .)uT-i jAgsOTA
2111202
0008 FEET EPTrt
74/0’/23 1- 4) 0 J00
15 40 0005
74/07/12 15 10 000 (1
15 10 0005
74/09/20 09 40 0000
09 40 G003
0 65 32217
‘ P1OS—TC,T CriL HYL
A
UC-/L
j. 1 i
J • 144
. Ib
C .242
• 144
C.O31
Ir coT LI
HEMNING
PE - CENT
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FIELD
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TOTAL
N
N—TOTAL
ORT iO
C T
fL
Ii’iCr ES
MjC..’OM 1O
5tJ
M ulL
Pl(,/I.
MG/L
MG/L
MG/L P
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12
563
a.50
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1.240
4.200
0.220
0.008
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11.0
o87
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198
1.330
4.300
0.200
0.OOd
26.4
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14
1305
9.L(,
155
u.080
2.800
0.100
0.037
24.7
.0
1271
8. o
169
0.090
3.000
0.080
0.031
16.-.
‘.0
12
1019
o .’.5
153
0.050
4.100
0.080
0.011
lo.’.
7.b
1019
8.L.5
153
0.0 ’.U
4.400
0.020
0.010
DATE
FPWM
TO
TIME DEPTrI
OF
DAY FEET
3r .3
Ifl.9
170.b
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