U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LOWER OTAY RESERVOIR
SAN DIEGO COUMY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 754
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
»
ON
LOWER OFAY RESERVOIR
SAN DIEGO COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 754
WITH THE COOPERATION OF THE
CALIFORNIA STATE WATER RESOURCES CONTROL BOARD
AND THE
CALIFORNIA NATIONAL GUARD
FEBRUARY, 1978
-------
CONTENTS
Page
Foreword ii
List of California Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Introduction 1
II. Conclusions . 1
III. Reservoir and Drainage Basin Characteristics 3
IV. Water Quality Summary 4
V. Literature Reviewed 8
VI. Appendices 9
-------
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 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 [§3Q3(e)], water
quality criteria/standards review [§303(c)]» clean lakes [§314(a,b)]5
and water quality monitoring [§106 and §305(b)"j activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
-------
Beyond the single lake analysis, broader based correlations
between nutrient concentration (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.
ACKNOWLEDGEMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U.S. Environmental Protection Agency)
expresses sincere appreciation to the California State Water
Resources Control Board and the nine Regional Water Quality
Control Boards for professional involvement, to the California
National Guard for conducting the tributary sampling phase of
the Survey, and to those California wastewater treatment plant
operators who voluntarily provided effluent samples and flow
data.
The staff of the Division of Planning and Research of the
State Water Resources Control Board provided invaluable lake
documentation and counsel during the Survey, coordinated the
reviews of the preliminary reports, and provided critiques
most useful in the preparation of this Working Paper series.
Major General Glen C. Ames, the Adjutant General of Cali-
fornia, and Project Officer Second Lieutenant Terry L. Barrie,
who directed the volunteer efforts of the California National
Guardsmen, are also gratefully acknowledged for their assistance
to the Survey.
-------
IV
NATIONAL EUTROPHICATION SURVEY
STUDY RESERVOIRS
State of California
'Name
Arnador
Boca
Britton
Casitas
Crow!ey
Don Pedro
Elsinore
Fallen Leaf
Hennessey
Henshaw
Iron Gate
Lopez
Mary
Mendocino
Nicasio
Lower Otay
Pillsbury
Santa Margarita
Shasta
Shaver
Silver
Tahoe
Tulloch
Lower Twin
Upper Twin
County
Amador
Nevada
Shasta
Ventura
Mono
Tuolumne
Riverside
El Dorado
Napa
San Diego
Siskiyou
San Luis Obispo
Mono
Mendocino
Marin
San Diego
Lake
San Luis Obispo
Shasta
Fresno
Mono
El Dorado, Placer, CA;
Carson City, Douglas,
Washoe, NV
Calaveras, Tuoluinne
Mono
Mono
-------
LOWER
OTAY
RESERVOIR
LOWER OTAY RESERVOIR
Tributary Sampling Site
X Lake Sampling Site
Land Subject to Inundation
1 4567
-------
LOWER OTAY RESERVOIR
STORE! NO. 0618
I. INTRODUCTION
Because of lack of flows, only one sample was taken from each of
the two gaged inlet tributaries during the sampling year (stations E-l
and F-l; see map, page v). Therefore, this report relates only to the
reservoir sampling data.
The outlet data, the limited inlet sampling data, and the flow
data are included in the appendices for the record.
II. CONCLUSIONS
A. Trophic Condition*:
Survey data indicate that Lower Otay Reservoir is eutrophic.
It ranked twenty-second in overall trophic quality when the
24 California lakes and reservoirs sampled in 1975 were com-
pared using a combination of six parameters**. Eighteen of the
lakes had less median total phosphorus, 12 had less and one
had the same median dissolved orthophosphorus, 20 had less
median inorganic nitrogen and mean chlorophyll a_, and 18 had
greater mean Secchi disc transparency. Significant depression
of dissolved oxygen with depth occurred at sampling station 1
in March and June. Destratification equipment (aeration) has been
installed in this reservoir (Bailey, 1977).
Survey limnologists noted surface algal scums and extensive
beds of submerged macrophytes in the reservoir in June. Copper
* Trophic assessment is based on the levels of nutrients, dissolved oxygen,
and chlorophyll a_; the phytoplankton kinds and numbers; and transparency
(Allurn et a]., 1977).
** See Appendix A.
-------
2
sulfate has been applied to the reservoir occasionally for the
control of algae (Bailey, op.-cit.).
B. Rate-Limiting Nutrient:
The algal assay results are not considered representative
of conditions in the reservoir at the times of sampling (03/07/75
and 11/14/75). The reservoir data indicate phosphorus limitation
at both stations in March, nitrogen limitation at both stations
in June, and phosphorus limitation at station 1 but nitrogen
limitation at station 2 in November.
-------
III. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry ':
1. Surface area: 4.58 kilometers2.
2. Mean depth: 15.2 meters.
3. Maximum depth: 44.2 meters.
4. Volume: 69.557 x 106 m3.
B. Precipitation*:
1. Year of sampling: 33.6 centimeters.
2. Mean annual: 35.7 centimeters.
t Table of metric equivalents—Appendix B.
tt Dendy, 1974.
* See Working Paper No. 175, "...Survey Methods, 1973-1976"
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4
IV. WATER QUALITY SUMMARY
Lower Otay Reservoir was sampled three times in 1975 by means
of a pontoon-equipped Huey helicopter. Each time, samples for physical
and chemical parameters were collected from a number of depths at
two stations on the reservoir (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 and last visits, 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 ^analysis. The maximum depths sampled
were 11.6 meters at station 1 and 6.4 meters at station 2.
The sampling results are presented in full in Appendix C and
are summarized in the following table.
-------
PARAMETER
TEMP
OISS OXY (MG/L>
CNOCTVY (MC90MO)
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 (UG/L)
SECCHI (METEPS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 3/ 7/75)
2 SITES
CHEMICAL CHARACTERISTICS FOR LOWER OTAY RESERVOIR
STORET CuOt. 0618
2ND SAMPLING ( 6/20/75)
2 SITES
3RD SAMPLING (11/14/75)
2 SITES
KANGE
11.9
2.2
911.
7.9
159.
0.050
0.011
0.020
0.200
0.800
0.220
O.S20
14.0
««»«»
- 14.0
8.0
- 966.
8.5
- 171.
- 0.087
- 0.026
- 0.020
- 0.260
- 1.700
- 0.280
- 1.720
- 15.7
-««»«««»<
MEAN
13.2
6.1
936.
8.3
164.
0.063
0.015
0.020
0.222
1.100
0.243
1.120
14.8
>«»««««»i
MEDIAN
13.4
7.1
934.
8.4
164.
0.058
0.013
0.020
0.215
1.050
0.235
1.070
14.8
nnnnn>»
RANGE
11.3
0.0
769.
7.8
148.
0.033
0.006
0.020
0.050
0.800
0.070
0.820
4.7
1.5
- 19.8
- 12.0
- 882.
8.1
- 176.
- 0.198
- 0.156
- 0.020
- 0.440
- 1.100
- 0.460
- 1.120
4.8
1.7
MEAN
17.3
6.0
849.
8.0
154.
0.056
0.028
0.020
0.107
0.878
0.127
0.898
4.7
1.6
MEDIAN
19.2
6.8
874.
8.1
151.
0.038
0.012
0.020
0.070
0.800
0.090
0.820
4.7
1.6
RANGE
16.5
4.8
767.
7.8
140.
0.064
0.008
0.020
0.110
0.600
0.140
0.620
17.9
0.9
- 17.1
8.2
- 782.
8.3
- 148.
- 0.092
- 0.036
- 0.030
- 0.260
- 0.900
- 0.280
- 0.920
- 38.5
1.2
M£AN
16.6
6.1
774.
8.0
143.
0.079
0.016
0.021
0.170
0.800
0.191
O.d21
28.2
1.1
MEDIAN
16.7
6.0
775.
4.0
142.
0.081
0.013
0.020
0.160
0.800
0.180
0.820
23.2
1.1
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/07/75
06/20/75
11/14/75
2. Chlorophyll a_ -
Sampli ng
Date
03/07/75
06/20/75
11/14/75
Dominant
Genera
1. Asterionella sp.
2. Coelastrum sp.
3. Cryptomonas sp.
4. Scenedesmus sp.
5. Oocystis sp.
Other genera
Total
1. Aphanizomenon sp.
2. Dactylococcopsis sp.
3. Dinobryon sp.
4. Oscillatoria sp_.
5. Anabaena sp.
Other genera
Total
1. Oscillatoria sp.
2. Chlamydomonas sp.
3. Dactylococcopsis sp.
4. Scenedesmus sp.
5. Cryptomonas sp.
Other genera
Total
Station
Number
1
2
1
2
1
2
Algal Units
per ml
2,170
457
381
304
266
381
3,959
370
148
74
74
74
75
815
6,873
1,430
440
440
385
329
9,897
Chlorophyll a^
14.0
15.7
4.8
4.7
17.9
38.5
-------
7
C. Limiting Nutrient Study:
Significant nutrient changes occurred in the algal assay
samples between the times of collection and the beginning of
the assays, and the results are not considered representative
of conditions in the reservoir at the times the samples were
taken (03/07/75 and 11/14/75).
The reservoir data indicate phosphorus limitation at both
stations in March (the mean inorganic nitrogen/orthophosphorus
ratios were 15/1 and 18/1 at stations 1 and 2, respectively),
nitrogen limitation at both stations in June (N/P ratios were
4/1 and 10/1), and phosphorus limitation at station 1 (N/P =
20/1) but nitrogen limitation at station 2 (N/P = 7/1) in
November.
-------
LITERATURE REVIEWED
Allum, M. 0., R. E. Glessner, and J. H. Gakstatter, 1977. An
evaluation of the National Eutrophication Survey data. Working
Paper No. 900, Corvallis Env. Res. Lab., Corvallis, OR.
Bailey, Thomas E., 1977. Personal communication (reviews of pre-
liminary reports). CA Water Res. Contr. Bd., Sacramento.
Dendy, William B., 1974. Personal communication (reservoir infor-
mation and morphometry). CA Water Res. Contr. Bd., Sacramento.
-------
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LAKE DATA TO BE USEO IN BANKINGS
COOE LAKE NAME
0601 A"AuG
0602 eocA LAKE
0603 LAKE BPITTON
0604 CASITAS RESERVOIR
06U5 CPOWLEY LAKE
0606 DON PEORO RESERVOIR
0607 LAKE ELSINORE
0603 FALLEN LEAF RESERVOIR
0609 LAKE HENNESSEY
0610 LAKE HENSHAW
0611 IRON GATE RESERVOIR
0614 LOPEZ LAKE
0615 LAKE MARY
0616 LAKE MENDOCINO
0617 NICASIO RESERVOIR
0618 LOWER OTAY RESERVOIR
0619 LAKE PILLSBURY
0620 SANTA MARGARITA LAKE
0621 SHASTA LAKE
0622 SHAVES
0623 SILVER LAKE
0624 TULLOCK RESERVOIR
0625 IJt'PER TWIN LAKES
0626 LOWLR TWIN LAKES
MEDIAN
TOTAL f
0.040
0.012
0.067
0.029
0.046
0.013
0.469
0.007
0.027
0.138
0.184
0.371
0.010
0.020
0.055
0.058
0.022
G.037
0.021
0.014
0.012
0.025
0.015
0.014
MEDIAN
0.390
0.040
0.115
0.050
0.045
0.060
0.120
0.040
0.060
0.070
0.690
0.090
0.040
0.050
0.345
0.180
0.060
0.070
0.060
0.060
0.055
0.060
0.040
0.040
500-
MEAN 5EC
408.667
372.633
443.500
400.250
374-. 7 50
381.733
489.214
24.357
416.000
461.000
440.333
372.000
296.000
436.500
482.778
447.250
466.667
400.000
381.542
346.400
356.000
433.000
300.200
248.000
MEAN
CHLORA
22.383
1.700
4.811
3.192
5.800
3.564
70.572
0.786
4.525
26.783
6.217
8.658
2.550
3.100
6.633
15.933
6.389
9.122
4.087
1.700
1.800
13.878
3.340
2.900
15-
MIN 00
14.600
6.800
11.200
14.000
12.200
11.400
8.000
8.800
15.000
9.800
13.800
15.000
10.600
9.400
9.800
15.000
a. 200
14.800
9.000
7.400
7.000
7.400
7.400
11.400
MEDIAN
DISS OHTnO P
0.020
0.003
0.04/
0.014
0.034
0.004
0.092
0.005
0.012
0.073
0.124
0.343
0.002
0.008
0.013
0.013
0.008
0.014
0.015
0.004
0.003
0.009
0.004
0.003
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PERCENT OF L.1RO RESERVOIR
060? LAKE ELSINORE
0608 FALLEN LEAF RESERVOIR
0609 LAKE HFNNESSEY
0610 LAKE HENSHAW
0611 IRON GATE RESERVOIR
0614 LOPEZ LAKE
0615 LAKE MARY
0616 LAKE MENOOCINO
0617 NICACIO" RESERVOIR
0618 LOWER OTAY RESERVOIR
0619 LAKE PILLSBURY
0620 SANTA MARGARITA LAKE
0621 SHASTA LAKE
0622 SHAVER
062J SILVER LAKE
0624 TULLOCK RESERVOIR
0625 UPPtR TWIN LAKES
0626 LOWER TWIN LAKES
MEDIAN
TOTAL P
35
89
17
43
30
83
0
100
48
13
9
4
96
65
26
22
57
39
61
78
89
52
70
74
( 8)
< 2O
( H>
( 10)
( 7)
( 19)
( 0)
< 23)
( ID
< 3)
( 2)
( 1)
( 22)
( 15)
( 6)
( 5)
( 13)
( 9)
( 14)
( 18)
< 20)
< 12)
< If)
< 17)
MEDIAN
INOPG
4 (
96 (
22 (
74 (
78 (
S4 (
17 (
87 (
b4 (
33 (
0 (
26 (
87 <
70 (
9 (
13 (
41 (
33 (
54 (
M <
65 (
b4 (
98 <
87 <
N
1)
?2>
5)
17)
18)
11)
4)
19)
11)
7)
0)
6)
19)
16)
2)
3)
9)
7)
11)
9)
15)
11)
22)
19)
500-
MEAN SEC
43 (
70 (
17 (
48 (
65 (
57 (
0 (
100 (
39 (
13 (
26 (
74 (
91 (
30 <
4 (
22 <
9 (
52 (
61 (
83 (
78 (
35 (
87 (
96 (
10)
16)
4)
11)
15)
13)
0)
23)
9)
3)
6)
17)
21)
7)
1)
5)
2)
12)
14)
19)
18)
8)
20)
22)
MEAN
CHLORA
9
si
48
7C
43
61
0
100
52
4
39
26
83
74
30
13
35
22
57
96
87
17
65
78
( 2)
( 21)
( 11)
( 16)
( 10)
( 14)
( 0)
( 23)
( 12)
( 1)
< 9)
( 6)
< 19)
( 17)
( 7)
( 3)
( 8)
( 5)
( 13)
( 22)
( 20)
( 4)
( 15)
( 18)
15-
MIN 00
17
100
43
22
30
37
78
70
4
54
26
4
48
61
54
4
74
13
65
87
96
87
87
37
< 4)
( 23)
( 10)
< 5)
( 7)
( 8)
( 18)
( 16)
( 0)
( 12)
( 6)
( 0)
( 11)
( 14)
( 12)
( 0)
( 17)
( 3)
( 15)
( 19)
( 22)
( 19)
( 19)
( 8)
-MEDIAN
OISS ORTHO P
26
91
17
37
22
78
9
70
52
13
4
0
100
63
46
46
63
37
30
78
91
57
78
91
( 6)
( 20)
( 4)
( 8)
( 5)
< 17)
( 2)
( 16)
( 12)
< 3)
( 1)
( 0)
( 23)
( 14)
( 10)
( 10)
( 14)
( 8)
( 7)
( 17)
( 20)
( 13)
( 17)
( 20)
INDEX
NU
134
539
164
294
268
370
104
527
249
130
104
134
505
363
169
120
279
196
328
463
506
302
485
463
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LAKES RANKED BY INDEX NOS.
RASK LAKE CODE LAKE NAME INDEX NO
1 0602 BOCA LAKE 539
2 0608 FALLEN LEAF RESERVOIR 527
3 0623 SILVER LAKE 506
4 0615 LAKE MARY 505
5 0625 UPPER TWIN LAKES 485
6 0626 LOWER TWIN LAKES 463
7 0622 SHAVER 463
8 0606 DON PEDRO RESERVOIR 370
9 0616 LAKE MENDOCINO 363
10 0621 SHASTA LAKE 328
11 0624 TULLOCK RESERVOIR 302
12 0604 CASITAS RESERVOIR 294
13 0619 LAKE PILLSBURY 879
1<» 0605 CROWLEY LAKE 268
15 0609 LAKE HENNESSEY 249
16 0620 SANTA MARGARITA LAKE 196
17 0617 NICASIO RESERVOIR 169
18 0603 LAKE brtlTTON 164
19 0614 LOPEZ LAKE 134
20 0601 AMADOR RESERVOIR 134
21 0610 LAKE HENSHArf 130
22 0618 LOWER OTAY RESERVOIR 120
23 0607 LAKE ELSINORE 104
24 0611 IRON GATE RESERVOIR 104
-------
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
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR CALIFORNIA
LAKE CODE 0618 LO*ER OTAY RES.
TOTAL DRAINAGE AKEA OF LAKEfSQ KM) 256.4
12/03/76
SUB-DRAINAGE;
TRIBUTARY AREA(SO KM)
0618E1
0618F1
06182Z
181.8
0.8
69.2
JAN
0.23
0.001
0.085
FE8
0.34
C.OC1
0.130
MAR
0.54
0.002
0.204
APR
0.51
0.002
0.190
MAY
0.45
0.002
0.167
NORMALIZED FLOWS(CMS)
JUN ML AUG
0.42
0.002
0.164
0.34
0.001
0.130
0.28
0.001
0.108
SEP
0.22
0.001
0.085
OCT
0.14
0.001
0.054
NOV
0.21
0.001
0.079
DEC
0.28
0.001
0.108
MEAN
0.33
0.001
0.125
TOTAL DRAINAGE AREA OF LAKE
SUM OF SUB-DRAINAGE AREAS
0618E1
0618F1
0618ZZ
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
4
5
6
7
8
9
10
74
74
75
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
75
0.0
0.0
0.0
0.0
0.011
0.213
0.016
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.000
0.001
0.000
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.004
0.082
0.006
0.0
0.0
0.0
0.0
0.0
16
20
19
22
8
19
1
16
20
19
22
8
19
31
20
0.0
0.0
0.0
0.0
0.0
0.280
0.0
0.0
0.0
0.0
0.0
0.0
0.001
0.0
0.0
SUMMARY
256.4
251.7
TOTAL FLOW IN =
TOTAL FLOW OUT =
5.49
0.0
MEAN MONTHLY FLO*S AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY
16
20
FLOW DAY
0.008 23
0.0
FLOW
0.005
16
0.000 23
0.0
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/09/34
-0.6-iaoj.
32 36 47.0 116 55 40.0 3
LO.WER OTAY RESERVOIR
06073 CALIFORNIA
140891
11EPALES 2111202
0040 FEET DEPTH CLASS 00
DATE
FROM
ro
75/03/07
75/06/20
75/11/14
DATE
FROM
TO
75/03/07
75/06/20
75/11/14
TIME
OF
DAY
1 00
1 00
1 00
I 00
1 00
1 45
1 45
1 45
11 45
11 45
13 30
13 30
13 30
13 30
TIME
OF
DAY
11 00
11 00
11 00
11 00
11 00
11 45
11 45
11 45
11 45
11 45
13 30
13 30
13 30
13 30
DEPTH
FEET
0000
0005
0015
0025
0035
0000
0005
0015
0025
0038
0000
0005
0015
0034
DEPTH
FEET
0000
0005
0015
0025
0035
0000
0005
0015
0025
0038
0000
0005
0015
0034
00010
rfATER
TEMP
CENT
1<*.0
13.6
13.3
12.2
11.9
19.6
19.5
19.4
14.7
13.3
17.0
16.7
16.6
16.5
00665
PHOS-TOT
MG/L P
0.066
0.058
0.050
0.053
0.087
0.039
0.037
0.045
0.198
0.038
0.083
0.064
0.081
0.076
00300
DO
MG/L
8.
7.
6.
3.
2.
5.
12.
8.
0.
1.
6.
4.
4.
4.
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
0
8
2
0
2
2 66
0
0
0
6
0 48
8
8
8
944
934
966
955
933
878
874
874
782
769
776
772
775
767
00400 00410
PH T ALK
CAC03
su
8
8
8
7
7
8
8
8
7
7
8
7
7
7
.50
.50
.40
•95f
.90
.10
.10
.10
.80
.90
.00
.85
.85
.83
MG/L
159
163
162
170
171
149
149
148
176
151
143
148
142
142
00610 00625
NH3-N TOT KJEL
TOTAL N
MG/L
0.200
0.210
0.210
0.260
0.250
0.080
0.070
0.070
0.440
0.060
0.160
0.240
0.260
0.140
MG/L
1.700
1.200
1.000
0.900
1.000
1.000
0.900
0.800
1.100
0.800
0.600
0.800
0.900
0.900
32217 00031
CHLRPHYL INCDT LT
A
UG/L
14.
4.
17,
REMIMING
PERCENT
0
8
9
00630 00&71
N02&N03 PHOS-DIS
N-TOTAL OPTriO
MG/L MG/L P
0.020
0.020K
0.020K
0.020K
0.020K
0.020
0.020K
0.020K
0.020
0.020K
0.020
0.020K
0.020
0.020
0.013
0.013
0.011
0.026
0.018
0.016
0.012
0.016
0.156
0.018
0.015
0.009
0.008
0.013
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
RETRIEVAL OATE 76/09/24
DATE
F«0^
TO
75/03/07
75/06/20
75/11/14
TIME DEPTH
OF
DAY FEET
12 20 0000
12 20 0005
12 20 0011
12 10 0000
12 10 0005
12 10 0015
12 10 0021
13 50 0000
13 50 0005
13 50 0015
00010
WATER
TEMP
CENT
13.8
13.8
13.3
19.8
19.2
19.1
11.3
17.1
17.1
16.5
061802
32 38 18.0 116 55 46.0 3
LOWER OTAY RESERVOIR
06073 CALIFORNIA
140891
11EPALES
211
0015 FEET DEPTH CLASS
00300
00
MG/L
7.6
7.4
6.8
7.8
8.0
6.8
4.4
8.2
7.8
6.4
00077
TRANSP
SECCHI
INCHES
61
36
00094
CNDUCTVY
FIELD
MICROMHO
927
911
917
882
880
876
830
768
782
775
00400
PH
SU
8. 45
8.40
8.3Q
8.10
8.10
8.10
8.10
8.20
8.25
8.15
00410
T ALK
CAC03
MG/L
164
164
162
150
153
155
151
141
142
140
00610
NH3-N
TOTAL
MG/L
0.220
0.220
0.210
0.060
0.070
0.060
0.050
0.110
0.120
0.160
1202
00
00625
TOT KJEL
N
MG/L
1.100
1.100
0.800
0.900
0.800
0.800
0.800
0.800
0.800
0.800
00630
N02&N03
N-TOTAL
MG/L
0.020
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.030
0.020
0.020
00671
PHOS-DIS
ORTriO
MG/L P
0.011
0.018
0.011
0.006
0.009
0.009
0.009
0.020
0.036
0.013
DATE
FROM
TO
75/03/07
75/06/20
75/11/14
TIME DEPTH
OF
DAY FEET
12 20 0000
12 20 0005
12 20 0011
12 10 0000
12 10 0005
12 10 0015
12 10 0021
13 50 0000
13 50 0005
13 50 0015
00665
PHOS-TOT
MG/L P
0.059
0.079
0.053
0.036
0.034
0.033
0.046
0.092
6.086
0.071
32217
CHLRPHYL
A
UG/L
15.7
4.7
3R.5
00031
INCDT LT
REMNING
PERCENT
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STOPET
OATE 76/C9/24
DATE
Fi(OM OF
TO DAY FEET
7^/11/16
74/12/20
75/01/19
75/03/OH
75/03/16
75/03/23
75/04/19
75/35/20
75/06/21
75/09/20
75/10/13
10
09
10
09
10
10
09
09
14
16
10
S5
30
00
00
?0
15
30
30
00
4C
10
061881
32 36 28* 0 116 55 ^0*0 A
2ND SAN DIEGO AQUEDUCT
06 7.5 OTAY MESA
0/LOWER OTAY RESERVOIR 140891
UPPEK OTAY WTR TREATMENT PLANT
11EPALES 2111204
0000 FEET DEPTH CLASS 00
00630
N02SN03
N-TOTAL
MG/L
G.096
0.104
0.112
0.104
0.080
0.080
0.050
0.025
0.120
0.035
ft. 060
00625
TOT KJEL
N
MG/L
0.800
0.500
0.300
1.050
2.400
1.800
0.875
1.350
0.925
2.200
2.200
00610
NH3-N
TOTAL
MG/L
0.045
0.011
0.010
0.024
O.C42
0.060
O.C55
0.030
0.045
0.035
0.030
00671
PnOS-OIS
O'VTriO
MC-./L P
0.015
0.005K
0.008K
0.005
0.005K
0.005K
C.005K
0.010
C.005K
a. 005
00665
PHOS-TOT
MG/L P
0.050
0.015
0.010K
0.020
0.010
0.010K
0.020
0.010
0.020
0.020
0.030
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE
0618C1
32 36 20.0 116 55 52.0 4
UNNAMED AUUEDUCT
06 7.5 OTAY MESA
T/LOWER OTAY RESERVOIR 140891
KAv* dTR INTAKE FrtM PLT .4 M S* SAVAGE DM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM OF
TO DAY
TIME DEPTH
FEET
74/11/16
74/12/20
75/01/19
75/03/22
75/03/06
75/03/16
75/03/23
75/04/19
75/06/21
75/08/23
75/09/20
75/10/ltt
10 40
10 15
10 IS
09 05
09 05
10 30
10 00
09 35
14 30
10 00
16 30
09 30
00630
N02kN03
N-TOTAL
MG/L
U.064
0.044*
0.048
0.0t><*
0.008
0.062
0.060
0.010
0 .OS<0
0.030
0.04Q
0.025
00625
TOT KJEL
N
IG/L
2.500
1.650
0.700
2.600
1.400
3.900
2.500
1.550
2.600
1.D50
1.200
2.800
00610
NH3-N
TOTAL
MG/L
0.220
0.024
0.030
0.803
3.016
0.173
0.175
0.035
0.085
0.070
0.035
0.065
00671
PHOS-DIS
ORTrlO
MG/L P
0.070
0.015
0.020
0.072
0.016
0.033
0.030
0.025
O.C10
0.035
O.G20
0.025
00665
PHOS-TOT
MG/L ?
0.130
0.090
0.050
0.151
0.060
o.oeo
0.070
0.040
0.050
0.100
0.060
0.070
-------
STORET RETRIEVAL OATr.
00530 00625 00610 00671
DATE TIME DEPTH NO?*.N03 TOT KJEL NH3-N PHOS-OIS
FROM or . N-TI>TAL N TOTAL ORTHG
TO DAY FEET MC-/L MG/L MG/L MG/L P
0618EJ
32 38 15.0 116 53 00.0 4
JAMUL CREEK
06 7.5 JAMUL MTN
T/LOWER OTAY RESERVOIR 1^0891
OTAY LK RO BROG 3.3 MI SE KNCH DEL OTAY
11EPALES 2111204
0000 FEET DEPTH CLASS 00
00665
PHOS-TOT
MG/L P
75/0^/19 10 30
'.090
2.500
0.025
0.01S
0.080
-------
STORET RETRIEVAL OATE 76/09/?4
00630 00625 00610 00671
DATE TIME 0£PTH N026N03 TOT KJEL NH3-N PhOS-DIS
FROM OF N-TOTAL N TOTAL GRTHO
TO OAY FEET MG/L MG/L MG/L MG/L P
0618G1
32 38 40.0 116 50 40.0 4
UNNAMED CREEK
06 7.5 JAMUL MTN
T/LOWER OTAY RESERVOIR 140891
100 FT DNSTRM FRM UNMPROVt) RD XING
11EPALES 2111204
0000 FEET DEPTH CLASS 00
00665
PHOS-TOT
MG/L P
75/04/19 10 45
1.400
1.300
0.020
0.012
0.037
------- |