U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
TRUSSUMPOND
SUSSEX COUNJY
DELAWARE
EPA REGION III
WORKING PAPER No, 241
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
697-032
-------
REPORT ON
TRUSSUMPOND
SUSSEX CDUNJY
DELAWARE
EPA REGION III
WORKING PAPER No, 241
WITH THE COOPERATION OF THE
DELAWARE DEPARTMENT OF NATURAL RESOURCES
AND ENVIRONMENTAL CONTROL AND THE
DELAWARE NATIONAL GUARD
JUNE 1975
D ft)
-------
REPORT ON TRUSSUM POND
SUSSEX COUNTY, DELAWARE, EPA REGION III
by
National Eutrophication Survey
Water and Land Monitoring Branch
Monitoring Applications Laboratory
National Environmental Research Center
Las Vegas, Nevada
and
Eutrophication Survey Branch
Pacific Northwest Environmental Research Laboratory
National Environmental Research Center
Corvallis, Oregon
Working Paper No. 241
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
June 1975
-------
CONTENTS
Page
Foreword i i
List of Delaware 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 5
IV. Nutrient Loadings 9
V. Literature Reviewed 13
VI. Appendices 14
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972
1n response to an Administration commitment to investigate the
nationwide 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 nonpoint 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
watershed 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
-------
m
planning [§303(e)j, 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.
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.
ACKNOWLEDGMENTS
The staff of the National Eutrophication Survey (Office of
Research and Development, U.'S. Environmental Protection Agency)
expresses sincere appreciation to the Delaware Department of
Natural Resources and Environmental Control for professional
involvement and to the Delaware National Guard for conducting
the tributary sampling phase of the Survey.
Mr. N. C. Vasuki, Director, Division of Water Pollution
Control, Department of Natural Resources and Environmental
Control, provided invaluable lake documentation and counsel
during the course of the Survey.
Major General Clarence E. Atkinson, the Adjutant General
of Delaware, and Project Officer Colonel Donald S. Robinson,
who directed the volunteer efforts of the Delaware National
Guardsmen, are also gratefully acknowledged for their
assistance to the Survey.
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NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF DELAWARE
LAKE NAME
Kill en Pond
Moores Lake
Noxontown Pond
Silver Lake
Williams Pond
Trussum Pond
COUNTY
Kent
Kent
New Castle
New Castle
Sussex
Sussex
-------
TRUSSUM POND
(g) Tributary Sampling Site
x Lake Sampling Site
o 1 2 Km.
J Mi.
Scale
38 30'H
38'28H
-------
TRUSSUM POND
STORE! NO. 1010
I. CONCLUSIONS
A. Trophic Condition:
Trussum Pond is considered eutrophic based upon
field observations and analysis of Survey data. Most
of the pond is covered with cypress trees and higher
aquatic plants. According to information provided by
the State of Delaware, "fishing becomes difficult
during the early summer because of large patches of
floating heart, a pond lily. Spatterdock is
gradually encroaching into the shallow areas adjacent
to the shore. Bladderwart is very abundant in floating
masses, disturbing access to some areas."
The water was characterized as humic in color with
no visible algae.
Chlorophyll a_ levels ranged from a low of 3.8
micrograms/liter in the spring to 6.4 micrograms/liter
in the summer. The algal assay control yield was 0.3
micrograms/liter. These moderate values are probably
due to the utilization of nutrients by macrophytes.
-------
B. Rate-Limiting Nutrient:
Algal assay results indicate that Trussum Pond was
limited by available phosphorus levels. The ratios of
available nitrogen to orthophosphorus in sampled waters
substantiate phosphorus limitation.
C. Nutrient Controllability:
Nutrient loading to Trussum Pond slightly exceeds
Vollenweider's (in press) "dangerous" (eutrophic)
loading rate for phosphorus, and his "permissible"
(oligotrophic) rate by two times for a lake of such mean
depth and hydraulic retention time. However, Vollenweider's
model probably does not apply to water bodies with short
hydraulic retention times, and the mean hydraulic retention
time for Trussum Pond is only 6 days.
There are no known point sources contributing to the
nutrient budget of Trussum Pond. The James Branch (inlet
of pond) contributes 90.8% of the phosphorus loading to the
lake, and ungaged tributaries were estimated to have
contributed 7.2%. A determination of surrounding land
uses and unknown sources contributing loading is necessary
before recommendations for lake improvement can be proposed.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized
below. Trussum Pond's surface area was provided by the State
of Delaware; mean depth was estimated based on survey data; trib-
utary flow data were provided by the Delaware District Office
of the U.S. Geological Survey (USGS)(outlet drainage area
includes the lake surface area). Mean hydraulic retention
time was obtained by dividing the lake volume by the mean
flow of the outlet.
Precipitation values are estimated by methods as
outlined in National Eutrophication Survey (NES) Working
Paper No. 175. A table of metric/English conversions is
included as Appendix A.
A. Lake Morphometry:
1. Surface area: 0.22 km2.
2. Mean depth: 1.2 meters.
3. Maximum depth: 2.4 meters.
4. Volume: 0.264 x 106 m3.
5. Mean hydraulic retention time: 6 days.
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B. Tributary and Outlet (see Appendix C for flow data):
1. Tributaries -
Drainage Mean flow
Name • area(km?) (nr/sec)
A(2) James Branch 37.3 0.49
Minor tributaries &
immediate drainage - 1.3 0.04
Totals 38.6 0.53
2. Outlet - A(l) James Branch 38.6 0.53
C. Precipitation:
1. Year of sampling: 105.0 centimeters.
2. Mean annual: 109.4 centimeters.
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III. LAKE WATER QUALITY SUMMARY
Trussum Pond was sampled two 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 one station on the pond and from one or more
depths at that station (see map, page v). During each visit,
depth-integrated samples were collected from Station 1 for
chlorophyll a_ analysis and phytoplankton identification and
enumeration. During the first visit, an 18.9-liter depth-
integrated sample was composited for algal assays. Maximum
depth sampled was 0.9 meters at Station 1. For a more detailed
, explanation of NES methods, see NES Working Paper No. 175.
The results obtained are presented in full in Appendix D
and are summarized in III A for waters at the surface and at
the maximum depth for each site. Results of the phytoplankton
counts and chlorophyll ^determinations are included in III B.
Results of the limiting nutrient study are presented in III C.
-------
PARAMETER
A. PHYSICAL AND CHEMICAL CHARACTERISTICS:
< 4/10/73 )
MAX
S*»» = 1 DEPTH
RANGE
N* RANGE MEDIAN (METERS)
( 7/20/73 )
MAX
S»" = 1 DEPTH
RANGE
RANGE MEDIAN (METERS)
0.-1.5 M DEPTH
MAX DEPTH**
DISSOLVED OXYGEN
0.-1.5 M DEPTH
MAX DEPTH"
2
1
(MG/L)
1
1
CONDUCTIVITY (UMHOS)
0.-1.5 M DEPTH 2
MAX DEPTH** 1
PH (STANDARD UNITS)
0.-1.5 M DEPTH 2
MAX DEPTH** 1
TOTAL ALKALINITY
0.-1.5 M DEPTH
MAX DEPTH"
TOTAL P (MG/L)
0.-1.5 M DEPTH
MAX DEPTH"
DISSOLVED ORTHO P
0.-1.5 M DEPTH
MAX DEPTH"
N02«N03 (MG/L)
0.-1.5 M DEPTH
MAX DEPTH**
AMMONIA (MG/L)
0.-1.5 M DEPTH
MAX DEPTH**
KJELDAHL N (MG/L>
0.-1.5 M DEPTH
MAX DEPTH"
(MG/L)
2
1
2
1
(MG/L)
2
1
2
1
2
1
2
1
13.0-
13.0-
9.2-
9.2-
70.-
70.-
7.7-
7.7-
10.-
10.-
0.038-0
0.038-0
13.1
13.0
9.2
9.2
70.
70.
8.2
7.7
10.
10.
.040
.038
0.011-0.013
0.011-0.011
1.200-1.200
1.200-1.200
0.080-0
0.080-0
0.600-0
0.600-0
.090
.080
.600
.600
13.0
13.0
9.2
9.2
70.
70.
7.9
7.7
10.
10.
0.039
0.038
0.012
0.011
1.200
1.200
0.085
0.080
0.600
0.600
0.0-
0.9-
0.9-
0.9-
0.0-
0.9-
0.0-
0.9-
0.0-
0.9-
0.0-
0.9-
0.0-
0.9-
0.0-
0.9-
0.0-
0.9-
0.0-
0.9-
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
1
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
28.7- 28.7
28.7- 28.7
9.7- 9.7
9.7- 9.7
**»•«_*»***
6.8- 6.8
6.8- 6.8
14.- 14.
14.- 14.
0.022-0.022
0.022-0.022
0.007-0.007
0.007-0.007
0.100-0.100
0.100-0.100
0.060-0.060
0.060-0.060
0.600-0.600
0.600-0.600
28.7
28.7
9.7
9.7
6.8
6.8
14.
14.
0.022
0.022
0.007
0.007
0.100
0.100
0.060
0.060
0.600
0.600
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0
0.0
0.0
0.0
*••*
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
SECCH1 DISC (METERS)
0.9- 0.9
0.9
0 *****-*««•* *•**•
* N = NO. OF SAMPLES
«» MAXIMUM DEPTH SAMPLED AT EACH SITE
»»* S = NO. OF SITES SAMPLED ON THIS DATE
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B.
Biological Characteristics:
1. Phytoplankton -
C.
Sampling
Date
04/10/73
07/30/73
2. Chlorophyll
Sampling
Date
04/10/73
07/20/73
Limiting Nutrient
1. Autoclaved,
Spike(mg/l)
Control
0.05 P
0.05 P + 1.0
1.00 N
Dominant
Genera
1. Flagellates
2. Lyngbya
3. Melosira
4. Fragilaria
5 . Synedra
Other genera
Total
1. Flagellates
2. Spondylosium
3. Cosmarium
4. Dinoflagellates
5. Centric diatom
Other genera
Total
a_ -
Algal
Units
per ml
1,031
42
42
36
24
133
1,308
361
361
258
206
77
312
1,575
Station Chlorophyll a
Number (micrograms/Titer)
1
1
Study:
filtered, and nutrient spiked -
Ortho P Inorganic N
Conc.(mg/l) Conc.(mg/l)
0.008 0.60
0.058 0.60
N 0.058 1.60
0.008 1.60
3.8
6.4
Maximum yield
(mg/l-dry wt.)
0.3
19.0
21.4
0.2
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2. Discussion -
The control yield of the assay alga, Selenastrum
capricornutum, indicates that the potential for primary
production in Trussum Pond was moderately low at the
time of sampling. Increased growth of the test alga
in response to the addition of orthophosphorus, as
well as the lack of response to the addition of nitrogen,
indicates that the lake was phosphorus limited when
sampled. Spikes with nitrogen and phosphorus simul-
taneously resulted in maximum yield.
The ratios of inorganic nitrogen to orthophos-
phorus in the field samples for spring and summer
were 107:1 and 23:1, respectively, further indicating
phosphorus limitation.
-------
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Delaware
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 month of March when two samples
were collected. Sampling was begun in April 1973 and was
completed in March 1974.
Through an interagency agreement, stream flow estimates
for the year of sampling and a "normalized" or average year
were provided by the Delaware District Office of the USGS
for the tributary sites nearest the lake.
In this report, nutrient loads for sampled tributaries
were determined by using a modification of the USGS computer
program for calculating stream loadings. Nutrient loads
indicated for tributaries are those measured minus known
point source loads, if any.
Nutrient loadings for unsampled "minor tributaries and
immediate drainage" ("ZZ" of USGS) were estimated by using
the mean annual concentrations in James Branch at Station A(2)
and mean annual ZZ flow.
-------
10
A. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A(2) James Branch 345 90.8
b. Minor tributaries & immediate
drainage (nonpoint load) - 30 7.9
c. Known municipal STP's - None
d. Septic tanks* - <1 <0.1
e. Known industrial - None
f. Direct precipitation** - 5 1.3
Totals 380 100.0
2. Output - A(l) James Branch 250
3. Net annual P accumulation 130
*Estimate based on 2 lakeside residences.
**Estimated (see NES Working Paper No. 175).
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11
B. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
A(2) James Branch 33,780 92.2
b. Minor tributaries & immediate
drainage (nonpoint load) - 2,620 7.2
c. Known municipal STP's - None
d. Septic tanks* - <1 <0.1
e. Known industrial - None
f. Direct precipitation** - 240 0.6
Totals 36,640 100.0
2. Output - A(l) James Branch 27,560
3. Net annual N accumulation - 9,080
*Estimate based on 2 lakeside residences.
**Estimated (see NES Working Paper No. 175).
-------
12
C. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
f\
Tributary kg P/km^/yr kg N/knT/yr
A(l) James Branch 9 906
D. Yearly Loading Rates:
In the following table, the existing phosphorus
loading rate is compared to those proposed by Vollenweider
(in press). Essentially, his "dangerous" rate is the rate
at which the receiving waters 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."
Total Yearly
Phosphorus Loading Rate
(grams/nr/year)
Estimated loading rate for Trussum Pond 1.73
Vollenweider's "dangerous" or eutrophic rate 0.82
Vollenweider's "permissible" or oligotrophic rate 1.65
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13
V. LITERATURE REVIEWED
Lesser, Charles A. 1966. "Aquatic Vegetation Survey; Federal
Aid in Fish Restoration." Project #F-21-R. Delaware
Fish and Game Commission, Dover, Delaware.
U.S. Environmental Protection Agency. 1975. "National
Eutrophication Survey Methods 1973-1976." Working
Paper No. 175. NERC, Las Vegas, Nevada and PNERL,
Corvallis, Oregon.
Vollenweider, Richard A. (in press). "Input-Output Models."
Schweiz. Z. Hydro!.
-------
VI. APPENDICES
APPENDIX A
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
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
-------
APPENDIX B
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1973
STATE OF DELAWARE
-------
LAKE DATA ,TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
1002 KILLEN POND
1005 MOORES LAKE
1007 NOXONTOWN POND
1008 SILVER LAKE
1009 WILLIAMS POND
1010 TRUSSUM POND
MEDIAN
TOTAL P
0.170
0.245
0.160
0.227
0.042
0.038
MEDIAN
INORG N
1.610
2.400
0.530
4.750
2.010
1.280
500-
MEAN SEC
479.333
472.667
478.833
465.667
449.333
464.000
MEAN
CHLORA
116.200
81.267
37.600
26.700
30.100
5.100
15-
MIN DO
12.000
4.700
10.400
13.000
8.800
5.800
MEDL
OISS ORTl
0.042
0.071
0.016
0.096
0.010
0.011
-------
PERCENT .OF LAKES WITH HIGHER VALUES (NUMBER or LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
1002 KILLEN POND
1005 MOORES LAKE
1007 NOXONTOWN POND
1008 SILVER LAKE
1009 WILLIAMS POND
1010 TRUSSUM POND
MEDIAN
TOTAL P
40 (
0 (
60 (
20 (
80 (
100 (
2)
0)
3)
1)
4)
5)
MEDIAN
INORG N
60 (
20 (
100 (
0 (
40 (
80 (
3)
1)
5)
0)
2)
4)
500-
MEAN SEC
0 (
40 (
20 (
60 (
100 (
80 (
0)
2)
1)
3)
5)
4)
MEAN
CHLORA
0 (
20 (
40 (
80 (
60 (
100 (
0)
1)
2)
4)
3)
5)
15-
MIN
20 (
100 (
40 (
D (
60 (
80 (
DO
1)
5)
2)
0)
3)
4)
MEDIAN
OISS ORTHO
40 (
20 (
60 (
0 (
100 (
80 (
2)
1)
3)
0)
5)
4)
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APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR DELAWARE
10/20/75
LAKE CODE 1010
TrfUSSUM POND
SUB-DRAINAGE
TRIBUTARY AREAISQ MI)
1010A1
1010A2
1010ZZ
14.90
14.40
0.50
i OF LAKE(SO MI) 14.
JAN
24.00
23.50
0.50
FEB
28.50
26.00
2.50
MAR
35.00
32.00
3. 00
90
AHR
26.00
24.50
1.50
MAY
20.00
18.00
2.00
NORMALIZED FLOWS(CFS)
JUN JUL AUG
15.50
14.50
1.00
12.50
12.00
0.50
14.
13.
1.
50
50
00
SEP
8.60
8.00
0.60
OCT NOV
8.30 13.00
7.80 12.00
0.50 1.00
UEC MEAN
18.50 18.65
17.00 17.36
1.50 1.29
SUMMARY
TOTAL
SUM OF
DRAINAGE AREA OF LAKE =
SUB-DRAINAGE AREAS =
14.90
14.90
TOTAL
TOTAL
FLO*
FLOW
IN =
OUT =
224.40
224.40
MEAN MONTHLY FLOWS AND DAILY FLOWS(CFS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
1010A1
1010A2
1010ZZ
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
73
73
73
73
73
73
73
73
73
74
74
74
73
73
73
73
73
73
73
73
73
74
74
74
73
73
7J
73
73
73
73
73
73
74
It
74
FLOW DAY
FLOW DAY
26.00
16.50
11.50
8.60
19.00
11.00
6.60
6.60
18.00
34.00
19.50
18.20
24.00
15.50
10.50
8.10
17.50
10.00
6.10
6.10
16.00
31.20
16.20
17.20
2.00
1.00
1.00
0.50
1.50
1.00
0.50
0.50
2.00
2.80
1.30
1.00
28
20
24
22
19
23
28
11
2
6
10
10
28
20
24
22
19
23
28
11
2
6
10
1U
28
20
24
22
19
23
28
11
^
6
10
10
24.00
16.00
12.00
8.60
6.70
8.00
5.30
6.90
6.40
43.00
18.00 24
16.00 24
22.00
15.00
11.00
8.00
6.30
7.50
5.00
6.40
6.00
41.00
17.00 24
15.00 24
2.00
1.00
1.00
0.60
0.40
0.50
0.3d
0.50
0.40
2.40
1.40 24
0.90 24
18.00
18.00
17.00
17.00
1.00
1.00
FLOW
-------
APPENDIX D
PHYSICAL AND CHEMICAL DATA
-------
STORE! RETRIEVAL DATE 75/10/16
101001
38 31 22.0 075 30 48.0
TRUSSUM POND
10 DELAWARE
00010
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
73/04/10 13 30 0000 13.1
13 30 0003 13.0
73/07/20 15 50 0000 28.7
00300 00077 00094
DO TRANSP CNDUC
SECCHI FIELD
MG/L INCHES MICROl
9.2
9.7
36
11EPALES
3
2111202
0004 FEET
DEPTH
4
VY
HO
70
70
00400
PH
SU
8.20
7.70
6.80
00410
T ALK
CAC03
MG/L
10K
10K
14
00610
NH3-N
TOTAL
MG/L
0.090
0.080
0.060
00625
TOT KJEL
N
MG/L
0.600
0.600
0.600
00630
N02&N03
N-TOTAL
MG/L
1.200
1.200
0.100
00671
PHOS-DIS
ORTHO
MG/L P
0.013
0.011
0.007
DATE TIME DEPTH
FROM OF
TO DAY FEET
73/04/10 13 30 0000
13 30 0003
73/07/20 15 50 0000
10665
>S-TOT
i/L P
0.040
0.038
0.022
32217
CHLRPHYL
A
UG/L
3.8
6.4
K VALUE KNOWN TO BE
LES.S THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STORE! RETRIEVAL DATE 75/10/16
1010A1
38 31 30.0 075 31 00.0
JAMES BRANCH
10 7.5 LAUREL
0/TRUSSUM POND
BROG 4 MI SE OF LAUREL DELL
11EPALES 2111204
4 0000 FEET
DEPTH
DATE
FROM
TO
73/04/28
73/05/20
73/06/24
73/07/22
73/08/19
73/09/23
73/10/28
73/11/11
73/12/02
74/01/06
74/02/10
74/02/24
74/03/10
74/03/24
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12
11
09
11
10
13
10
14
09
09
11
10
09
09
50
30
25
15
00
30
20
45
30
10
00
00
15
20
MG/L
1
0
0
0
0
0
0
0
.040
.900
.350
.110
.550
.460
.440
.580
.680
.840
.700
.340
.180
MG/L
0.
0.
0.
0.
1.
0.
0.
0.
0.
0.
1.
0.
0.
0.
580
580
720
690
980
480
750
750
300
400
400
500
500
700
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
080
036
0.073
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
024
066
044
026
063
052
030
070
045
060
080
MG/L
0.
0.
0.
P
007
005K
010
0.005K
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
Oil
008
005K
008
005K
012
005K
010
010
005
MG/L P
0.015
0.020
0.025
0.015
0.025
0.015
0.005K
0.010
0.010
0.025
0.005
0.015
0.010
0.025
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 75/10/16
1010A2
38 31 00.0 075 30 30.0
JAMES BRANCH
10 7.5 LAUREL
I/TRUSSUM POND
BROG BELO PONO 4.5 MI SE OF LAUREL OELL
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/04/28
73/05/20
73/06/24
73/07/22
73/08/19
73/09/23
73/10/28
73/11/11
73/12/02
74/01/06
74/02/10
74/02/24
74/03/10
74/03/24
TIME DEPTH
OF
DAY FEET
13 05
11 45
10 00
11 55
10 45
14 30
11 00
15 15
10 00
10 00
11 30
09 15
10 00
10 05
00630
N02&N03
N-TOTAL
MG/L
1.120
1.320
0.960
0.512
0.980
0.880
0.965
0.940
2.000
2.100
1.760
1.505
1.510
00625
TOT KJEL
N
MG/L
0.860
0.380
0.580
1.400
1.760
2.900
1.200
0.550
0.250
0.450
0.500
0.500
0.400
0.500
00610
NH3-N
TOTAL
MG/L
0.026
0.105
0.058
0.190
0.046
0.110
0.042
0.031
0.032
0.028
0.040
0.025
0.020
0.045
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.013
0.019
0.035
0.015
0.010
0.007
0.007
0.008
0.012
0.010
0.005K
0.005
0.005
00665
PHOS-TOT
MG/L P
0.025
0.030
0.035
0.145
0.035
0.025
0.015
0.020
0.015
0.025
0.025
0.015
0.015
0.020
K VALUE KNOWN ro BE
LESS THAN INDICATED
------- |