U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKETOWE
MOHAVE COUNTY, ARIZONA
CLARK COUNTY, NEVADA
EPA REGION IX
WORKING PAPER No, 731
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
ffiKAVh CGim ARIZONA
CUm COUNTY, NEVADA
EPA REGION IX
WORKING PAPER No, 731
THE CGO?E!*ATXON OF THE
ARIZONA STATE DEPARTMENT OF HEALTH
AND THE
ARIZONA NATIONAL GUARD
UST, 1977
-------
REPORT ON LAKE MOHAVE
MOHAVE COUNTY, ARIZONA
CLARK COUNTY, NEVADA
EPA REGION IX
by
National Eutrophication Survey
Water and Land Quality Branch
Monitoring Operations Division
Environmental Monitoring & Support Laboratory
Las Vegas, Nevada
and
Special Studies Branch
Corvallis Environmental Research Laboratory
Corvallis, Oregon
Working Paper No- 731
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
August 1977
-------
CONTENTS
Foreword ii
List of Arizona Study Lakes iv
Lake and Drainage Area Map v
.Sections.
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
HI. Lake Water Quality Summary 5
IV. Nutrient Loadings 11
V. Literature Reviewed 15
VI. Appendices 16
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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 stalx-
environmental agencies, information on nutrient sources, concen-
trations, 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 water-
sheds.
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
planning [§303(e)], water quality criteria/standards review
[§303(c)~J, 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.
-------
ill
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condition
are being made to advance the rationale and data base for refine-
ment 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 the U.S. Environmental Protection
Agency 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 Arizona State Department
of Health for professional involvement, to the Arizona National
Guard for conducting the tributary sampling phase of the Survey,
and to those Arizona wastewater treatment plant operators who
provided effluent samples and flow data.
The staffs of the Bureau of Water Quality Control, Environ-
mental Health Services, Arizona State Department of Health, and
the Arizona Game and Fish Department, provided invaluable lake
documentation and counsel during the Survey, reviewed the pre-
liminary reports and provided critiques most useful in the
preparation of this Working Paper Series.
Major General John G. Smith, the Adjutant General of Arizona,
and Project Officer Colonel Richard A. Colson, who directed the
•-•olimteer efforts of the Arizona National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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"IV
NATIONAL EUTROPHICATION SURVEY
* *
STUDY LAKES
STATE OF ARIZONA -
LAKE NAME
Big Lake
Fools Hollow Lake
Lake Havasu
Luna Lake
Lyman Lake
Lake Mohave
Lake Pleasant
Lake Powell
Rainbow Lake
i
Theodore Roosevelt Lake
San Carlos Reservoir
COUNTY
Apache
Navajo
Mohave (San Bernadino
in CA)
Apache
Apache
Mohave (Clark in NV)
Yavapai, Maricopa
Coconino (Kane, Garfield,
San Juan in UT)
Navajo
Gila
Graham, Gila, Pinal
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LAKE MOHAVE
Tributary Sampling Site
X Lake Sampling Site
Sewage Treatment Facility
10 20 3,° Km-
10
Scale
15 Mi.
MOHAVE
0406B1
. _—,, . Kafherine
02-
01- .
da?
0406 Af.,
Out|e ^Bullhead City
0406E1
115'OQ'
COLORADO RIVER
114'30'
-------
REPORT ON LAKE MOHAVE, ARIZONA
STORE! NO. 0406
I. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that Lake Mohave is mesotrophic.
Chlorophyll a_ values in the lake ranged from 0.9 yg/1 to
11.4 yg/1 with a mean of 4.4 ug/1. Potential for primary
production as measured by algal assay control yields was
moderately low and lake water transparency was generally
good. Of the 11 Arizona lakes sampled in 1975, 8 had higher
madian total phosphorus values (0.017 mg/1), 1 had higher
median inorganic nitrogen levels (0.240 mg/1) and 3 had
higher median orthophosphorus levels (0.010 mg/1) than Lake
Mchave.
Survey limnologists did not report any problem algal
blooms or macrophyte growths during their visits to the Ic'Le.
B. Rate-Limiting Nutrient:
The algal assay results indicate that Lake Mohave was
linrited by available phosphorus during the sample collection
times (02/26/75, 12/02/75). Lake data further suggest primary
limitation by phosphorus.
*See Appendix E.
-------
C. Nutrient Controllability:
1. Point sources -
During the sampling year, there were no known point sources
directly impacting Lake Mohave. There is a plant at Katherina's
Landing which handles all the wastes from the Katherine': Landing
concession and the National Park Service. Discharges from the
plant are pumped into a series of evaporative lagoons and so
probably do not reach Lake Mohave; however, increased fecal coli-
form counts have been reported in the vicinity (Division of
International Engineering Co., Inc., and Metcalf and Eddy, Inc.,
1976).
o
The calculated annual loading of 2.39 g P/m /yr is almost
twice that proposed by Vollenweider (1975) as "eutrophic" for
a lake with such volume and retention time. If the present
loading continues, increasingly undesirable responses to enrich-
ment are likely to occur.
2. Nonpoint sources -
The Colorado River contributed approximately 98% of the' .
total phosphorus and nitrogen input to the lake during the
sampling year. Surrounding land uses and point sources upriver
contributing to the Colorado River "nonpoint" load should be
evaluated before a nutrient budget for the lake is defined.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake morphometry data were provided by Munari 0975) and Jenkins
and Morais (1971). Tributary flow data were provided by the Arizona
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 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:
2
1. Surface area: 105.63 km .
2. Mean depth: 18.9 meters.
3. Maximum depth: 40.2 meters.
4. Volume: 1,996.033 x 106 m3.
5. Mean hydraulic retention time: 73 days.
-------
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage2 Mean Flow
Name area (km ) (m3/sec)
A-2 Colorado River 434,601.8 314.74
Minor tributaries and
immediate drainage - 3,779.4 0.21
Total 438,381.2 314.95
2. Outlet - A-l Colorado River 438,486.8 317.53
C. Precipitation -
1. Year of sampling: 14.4 cm.
2. Mean annual: 30.6 cm.
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III. LAKE WATER QUALITY SUMMARY
Lake Mohave was sampled three times during the open-water
season of 1975 by means cf a pontoon-equipped Huey helicopter.
Each time, samples for physical and chemical parameters were col-
lected from eight stations on the lake and from a number of i •f'.hs
at each station (see map, page v). During each visit, depth-
integrated samples ware collected from each station for chlorophyll
ja analysis and phytoplankton identification and enumeration.
During the first and last visits, 18.9-liter depth-integrated
samples were composited for algal assays. Maximum depths sampled
were as follows:
Station Number Maximum Depth (meters)
01 38.1
02 15.2
03 26.5
04 28.6
05 18.3
06 19.8
07 22.6
08 36.6
For e. more detailed explanation of NES methods, see NES Working
Paper Mo, 175.
The results obtained are presented in full in Appendix C 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 chloro-
phyll a determinations are included in III-B. Results of the limiting
nutrient study are presented in 1H-C.
-------
( f/e.n/7^ i
MAX
DEPTH
PANGE
{
MAX
= 8 DEPTH
RANGE
WEDIAN (METERS)
(OE6
MAX DEPTH**
7.0- 11=6
6.7= 11.0
7.7 0.0- !.-> 16
7.1 14.0- 36.6 fl
18c7- 22.7
12.3- 19,4
21.8 0.0- 1.5 16
13.6 13.7- 38.1 8
12*9- 14.4
12.6- 14.3
14.1
14.1
0.0- 1.5
15.2- 35.1
DISSOLVED
O.-l.S M
MAX DEPTH**
(N'G/L)
14
I •».«!- 11.4
•J.ft- 11.0
11.1 0.0- l.b 16
1003 14.0- 3ft.6 8
7.0-
6.6-
9.8
9.2 0.0- 1.5 13
7.5 13C7- 38.1 8
8.8- 10.B
9.2- in.6
9.8
9.8
0.0- 1.5
15.2- 35.1
CONDUCTIVITY
0.-1.5 M
MAX DEPTH**
15
8
fiH.-iiso. HOT.
80?.-1112.
n. 0 - 1.
14.0- 36.
16 9(0-0.34i)
1.210-0.350
0.0- 1.5 16 0.020-0.210 0.045 0.0- 1.5 15 0.160-0.420 0.190 0.0- 1.5
14.0- 36.6 B 0.120-0.370 0.305 13.7- 38.1 8 0.160-0.410 0.1=50 15.2-35.1
AMMONIA (M6/L)
0.-1.5 M OEPTh
MAX DEPTH**
16 0.0^0-0.040 0.070 0.0- 1.5 16 0.020-0.090 0.040 0.0- 1.5 15 0.020-0.03C 0.020 0.0- 1,5
8 0.0?0-0.030 Oa1?o 14,0- 36.6 P 0.020-0,060 0.040 13.7- 38.1 8 0.020-0.030 0.025 15.2- 35.1
KJELDAHL N. (MR/L)
O.-l.S M "EPTH 16
MAX DEPTH** «
0.200-0.90fi Oo5SO n.O- 1.5 16 0.200-0.600 0.450 C.O- 1.5 16 0.200-0.300 0.200 C.O- 1.5
0.^00-0.900 0.4SO 14.0- 36.^ « 0»?00-C.500 0.300 13.7- 38.1 ft 0^200-0.300 0.200 15.2- 35,1
SECCHI DICC
2.1- 4.0
0.5- 3.8 2.1
2e7-
*•» MAXIMUM DEPTH SA'iKLt'J *T EACr <=ITt
»»« S = MO. OF STIES SAMKI. EO <'N T^I^ HATE
-------
Biological Characteristics;
1. Phytoplankton -
Sampling
02/26/75
05/5.2/75
12/03/75
Dominant
Genera
1.
2.
3,
Cyclotella
Chroomonas?
orconas
Other genera
Total
1 . Chrcojronas,?
2, 'Cyst
3= Oocystis
4- Fragilaria
5. Ce."atlum
Other genera
Total
1,
2.
3.
4.
5.
^^
Raphidiopsis
cTcToteTTa"'
Scenedasmus
Sy_ne_dra_
Other genera
Tota'i
Algal
Units
802
M/J
2,582
401
182
146
36
37
38020
3/8
310
?06
•.03
G9
69
1,135
-------
2. Chlorophyll a_
Sampling Station Chlorophyll a_
Date dumber I US/I)
02/26/75 0! 6.6
C2 5,5
03 5.4
04 b.y
On H. 4
06 4.6
07 S.5
C8 5,5
Go/W/5 01 1.4
0? J?.1!
03 2,4
04 3,2
oe 3.3
U6 0.5
07 1.6
C8
:'702303/7B 01 3.5
02 5.F
03 5.7
04 ' 3.7
OB . 9.7
CS 0.9
07 3.2
08 4.8
-------
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked
Spike .(mg/1)
Orthc P
Cone, (mg/1)
Inorganic N
Cone, (mg/1 )
a. 02/26/75 Stations 01, 03-05
Control <0.005
0.05 P O.055
0.05 P + 1.0 N <0.055
LOO N <0.005
Stations 02,08
Control <0.005
0.05 P <0.055
0.05 P + 1.0 N <0.055
1.00 N <0.005
Stations 06,07
Control
0,05 P
0.05 P + 1
l.CO N
0.005
0.055
0 N 0.055
0.005
b. 12/02/75 Stations 01,02
Control 0.005
C.05 P 0.055
0.05 P + 1.0 N 0.055
1.00 N 0.005
Control
0.05 P
0.05 P
1.00 N
1.0 N
0.005
0.055
0.055
0.005
0.258
0.258
1.258
1.258
0.217
0.217
1.217
1.217
0.288
0.288
1.288
1.288
0.190
0.190
1.190
1.190
Stations 03-05, 08
0.265
0.265
1.265
1.265
Maximum Yield
(mg/1-dry wt.)
0.2
0.4
0.7
0.3
0.2
8.0
22.6
0.2
0.3
0.5
0.7
0.3
0.3
8.4
19.3
0.3
0.5
8.3
18.5
0.5
-------
10
2. Discussion -
The control yields of the assay alga, Selenagtrutn capricornutum*,
indicate that the potential for primary productivity in Lake Mohave
was low at tha times of assay sample collection (02/26/75, 12/02/75).
In tha December samples, end in the February Stations 02,08 sample,
the slgnfleant growth response to the addition of phosphorus as well
as, the lack of response to the addition of nitrogen alone indicates
phosphorus limitation. In these assays the maximum increase in yield
over that of the control was achieved with the simultaneous addition
of both ptespnorus and nitrogen. In February, the assays for Stations
01, 03-07 showed only a slight increase in yield with the addition
nf Rutnesit spikes, suggesting col imitation by the two nutrients.
The- tnsan inorganic nitrogen to orthophosphorus ratios (N/P) in
the lake ckta were approximately 20/1, 14/1, and 87/1 in the spring,
SOTiar and fall, respectively, further suggesting primary limitation
by phosphorus in Lake Mohave (a mean N/P ratio of 14/1 or greater
generally reflects phosphorus limitation).
*For further information regarding the algal assay test procedure
and sal action of test organisms, see U.S. EPA (1971).
-------
11
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the Arizona 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 April and May when two samples were collected. Samp-
ling was begun in December 1974, and was completed in November 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
che Arizona 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 a 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" ("II" of USGS) were estimated by using the mean annual
2
nutrient loads, in kg/km /year, in the Colorado River at Station A-l
2
and multiplying the means by the II area in km .
-------
12
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A~2 Colorado River 247,325 97.8
b. Minor tributaries and immediate
drainage {nonpoint load) - 3,780 1.5
c. Known municipal STP's - None
d. Septic t^nks* - 5 <0.1
e. Known industrial - None
f. Direct precipitation** - 1,850 0.7
Total 252,960 100.0%
2. Outputs - A-l Colorado River 203,395
3. Net annual P accumulation - 49,565
*Estimate based on 10 lakeshore residences and 1 campground.
**Estimated (See NES Working Paper No. 175).
-------
13
Annual Total Nitrogen heading - Average Year:
1. Inputs -
% of
Source kg_N/yr total
a. Tributaries (nonpoint load) -
A-2 Colorado River 11,996,385 98.2
bo Minor tributaries and immediate
drainega (nonpoint load) - 1059825 0.9
c. Known municipal STP's - None
o. Septic tanks* - 175 <0.1
e. Known industrial - None
f. Direct precipitation** - I145040 0.9
Tota1 12,215,425 100.0%
2. Outputs - A-l Colorado River 8.,797,855
3. Net annual N accumulation - 3,418,570
*tst,imate based on 10 lakeshore residences and 1 campground.
^Estimated (See NES Working Paper No, 175).
-------
1.4
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
2 2
Tributary kg P/km /yr kg N/km /yr
Colorado River ] 28
E. Yearly Loadings:
In the following table, the existing phoshorus loading r
compared to the relationship proposed by Vollenweider (1975).
Essentially, his "eutrophic" loading is that at which the receiving
waters would become eutrophic or remain eutrophic; his "oligotrophic"
leading is that which would result in the receiving water remaining
oligotrophic or becoming oliaotrophic if morphometry permitted. A
"ipesotrophic" loading would ba considered one between "eutrophic"
a?sd ''oligotrophic",
Note that Vollenweider's model may not be applicable to water
bcdies with very short retention times or in which light penetration
Is severely restricted from high concentrations of suspended solids
in the surface waters.
Total Yearly
Phosphorus Loading
(g/m2/yr)
Estimated, loading for Laka Mohave 2.39
VoVienweider's "eutrophic" loading 1.84
Vollenweider's "oligotrophic" loading 0.92
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15
V. LITERATURE REVIEWED
Earl V. Miller Engineers, Division of International Engineering.Co.,
Inc., and Metcalf and Eddy Inc. 1976. Water Quality Manage-
ment Plan, Colorado Main Stem River Basin, Arizona. Prepared
for the Arizona Department of Health Services, Phoenix, Arizona.
Jenkins, R. M., and D. J. Morais. 1971. Reservoir Sport Fishing
Effort and Harvest in Relation to Environmental Variables.
Reservoir Fisheries and Limnology, Special Publication No. ii~
American Fisheries Society, pp. 371-384.
Munari, Robert. 1975. Personal Communication (lake morphometry).
Arizona Department of Health, Phoenix, Arizona.
U.S. Environmental Protection Agency. 1971. Algal Assay Procedure
Bottle Test. National Eutrophication Research Program, Corvallis,
Oregon.
U.S. Environmental Protection Agency. 1975. National Eutrophi-
cation Survey Methods 1973-1976. Working Paper No. 175.
National Environmental Research Center, Las Vegas, Nevada, and
Pacific Northwest Environmental Research Laboratory, Corvallis,
Oregon.
Vollenweider, R. A. 1975. Input-Output Models With Special
Reference to the Phosphorus Loading Concept in Limnology.
Schweiz. 7.. Hydrol. 37:53-84.
-------
16
VI. APPENDICES
APPENDIX A
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 - acres
Kilometers x 0.6214 = miles
deters x 3.281 = feet
Cybtc meters x 8.107 x 10 * acre/feet
Square kilometers x 0.3861 = square miles
Cubic sneters/sec x 35.315 - cubic feet/sec
Centimeters x 0.3937 ••» inches
s
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 s Ibs/square
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
HcUB I^O^A'! 10-' K3rt
L/'Ki Code.
Ak'L'A Of
iub~U*?AI
0406/2
3Hd560
FES
280^34
0-J233
MAP
J73878
0,b66
Ji..\
226.53
0.142
TOTAL DH4INAGF AKEA Ot-
SU^ OF SUB-ORAINAGt AnEAS
Ai-'rt
N-AY
379.45
410.59
O.dal
NUKMALlZEl)
JUN JUL
413.43
368.12
CS057
370«9b
O.Otia
399.27
356.79
O.i42
0.142
OCT
232.20
246.36
0.198
MOV
17ft.40
21H.04
0.2B3
DEC
MEAN
172.73 317.53
215.21 314.74
0.227 0.212
= 438486.G
=-. 43848ft. 7
MONTHLY FLO.^S AND DAILY
THIdUTA-V MONTH YEAH MEAN
0406Ai
SUMMARY
TOTAL FLO* IN
TOTAL FLOW GUI
3777.16
FLOW DAY
FLO*
12
1
2
3
4
4
5
c
6
1
8
9
10
11
11
12
12
1
1
2
3
3
4
4
5
6
6
7
?
H
9
10
74
75
75
75
7&
75
75
75
75
75
75
75
75
73
74
74
74
75
75
75
75
75
75
75
75
75
75
75
75
73
76
75
191,167
205.325
266.104
368.119
441.176
441.176
406.347
406.347
370.951
42^.186
408.612
346.032
248.169
185.957
239.787
195.811
195.811
237.324
237.324
314.600
344.899
344.899
414.559
414.559
445.990
363.976
3M3.97b
J-J2..277
J82,i 7 7
370,6^,7
317.715
252.813
7
15
15
11
26
10
24
14
5
23
13
18
15
16
13
20
10
28
17
28
23
29
17
17
30
18
31
20
28
150.079
291.663
283.168
137.620
563.505
577.664
345.465
390e772
438.911
368.119
334.139
257.966
205.863
147.248
152.345
151.212
157.442
273.824
353.960
410.594
438.911
487. OoO
359.624
455.91)1
399. ?b7
424.753
424. fb3
4<*1 .743
227. 951
7
15
15
11
26
10
24
14
5
23
13
18
15
16
13
20
18
28
17
28
23
29
17
17
30
18
31
20
28
122.895
390.772
322.812
67S394
696.594
688.099
270.426
308.654
455.901
390.772
376.614
250.604
243.525
103.640
147.248
108.170
158.574
275.240
393.604
552.178
6bt>.446
6*8.456
555.010
594.61>4
509.703
424, ^b3
368.114
339.602
192.555
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
bVJ'-cT kit"', lilVKi
NAIL huT««rj- ic;-
3b 12 05ol)
LA>.t?
OtUlb
16
18. C
1101-.1
0102 FEET DEf-Th
2111^02
CL6SS 00
0066-3 32217 U0031
UATt TI«E DtPTu kHOS-T'JT C^LwPHYL INCUT L
10
75/02/26
75/06/12
fb/12/02
UflY FEcT
13
13
13
13
13
13
13
13
13
13
13
13
13
13
11
11
11
11
11
U
30
30
30
30
30
30
30
30
30
30
30
30
30
30
45
4b
45
45
45
45
0000
00 OS
0021
OC3B
0056
0078
00y9
0000
OC05
0020
0040
ooro
OOSrO
0125
0000
0005
OOlb
0030
0050
0036
"•"•o/L f
-------
•MAIL
Li U * >.' L v
OOOlU
00300
DATE
ro
75/02/26
75/06/12
>'£>/ 12/02
OF TtMH
DAY KtET CL.MT
13
13
13
13
13
13
13
13
13
13
13
13
13
13
11
11
11
11
11
11
30
30
30
30
30
30
30
30
30
30
30
30
30
30
*5
*S
43
45
45
4b
OOCO
OOOb
0021
0038
0058
C078
0098
0300
OOOb
0020
00*0
0070
0090
0125
0000
0005
0015
0030
0050
0086
7
1
7
7
b
b
6
22
d\
d\t
i9
14
14
14
14
14
14
i4
14
14
.0
• 1
.0
.0
.9
.9
.8
. 3
.9
a 't.
.5
.5
.2
.0
.2
.3
.2
.2
.2
* C.
00
MG/L
11
10
la
11
11
lu
lj
7
a
M
b
6
6
9
9
9
9
9
y
- 0
08
.3
.0
.0
.B
.6
.2
.0
.2
.2
o4
.8
.0
.4
.0
• O
.*
.8
c8
0 U 0 / 7
C
(- I ELD
156
.ib 12 05*0 114 3* ).8.0 3
2IU202
Oi02 FEET U£>-TH CLASS 00
09*
CTVY
U
UMMU
lllb
1112
1106
1107
1100
1100
1053
1058
101*
1001
392
£8*
882
a55
«i>3
85i
•150
849
8*8
00^00
HH
SU
6.b5
8.bO
S.55
S.bb
8.5b
8.55
8.55
8.60
8«bO
8.50
8.55
8.10
8.05
a. ob
H. bo
8.50
8.50
8.50
8.50
8.60
00<*10
r ALH
CACOJ
MG/L
iHl
1*2
142
1*2
141
141
141
137
135
137
13B
141
14*
142
127
127
127
125
127
124
00610
Nfi3'>N
fOTAL
MG/L
Oo020
0.020K
0.020*
0.020K
0.020K
0.020K
0.020K
0.090
0.040
o.oao
0.050
0.060
0.060
0.050
0.020K
0.020
0.020
0.020
0.030
0.030
0062b
TOT KJEL
N
M6/L
0.500
0,000
0.700
0.600
0.600
0.600
0.600
0.600
0.300
O.*00
0.300
0.300
0.300
0. JOG
0.200
0.200
0.200
0.200
0.200K
0.200
006.-10
NU2&.NU3
N-TOTflL
MG/L
O.?20
0.210
0.210
O.?10
0.220
0.220
0.220
0.090
0.070
0.100
0.120
O.?80
0.310
0.330
0..160
O.lbO
0.160
0.160
0.160
0.) 70
00671
PHOS-OIS
ORTrtO
rtG/L P
0.015
0.013
0.013
0.012
0.006
0.012
0.006
0.012
0.003
O.OOH
0.004
0.00*
0.011
O.Oi*
0,002K
O.OG2K
0« 002K
0.002K
0.002K
0.002
K VALUE KfiOMN TO 3E LESS
THAN INDICATED
-------
STjt-tV .£T , [
'MAIL. t.i;T«O';>iIC«T
t> A-LAS VtSAS
3s 12 57.U ii4
10.0 3
llt>ALtS 211120C
OObO FEET DEHTh CLASS 00
DATE TIx
hrcO« Of-
TO DAY
FEET
75/02/26 1* 20 0000
1* 20 OOUb
1* 20 0017
It 20 002^
1* 20 0036
14 20 0046
7b/0b/12 13 55 0000
13 55 000*3
13 55 0020
13 55 0045
75/12/02 lb 00 0000
15 00 0005
15 00 0015
15 00 OOJO
15 00 0050
OUJlO
CENT
00300
DO
MG/L
7.2
7.3
7.3
T.3
7>, 3
7.?
21 o 4
20. y
20. a
19, <»
14.0
14.0
A4.0
14. 0
14.0
11.0
11.2
11.0
11.0
11.0
11.0
'4.4
7.4
a. 6
7.d
9. a
10.4
9.8
10oO
10.4
00077 00094
TKfliji^ Cr.fJUCTVY
^tCCr-tl FltLO
II\CrttS MlCH'OMnU
120 1078
1103
1083
1101
1067
109*
1060
1027
1013
V96
120 347
646
846
846
846
00400
PM
S(J
8.60
6.60
8.60
6.60
6.55
8.60
8,60
8.55
8.65
6.55
8.60
6.60
8.60
8.60
8.60
COMO
T ALK
CAC03
MG/t.
141
143
142
142
142
142
137
135
137
137
126
125
12-*
129
00610 00623 00630
Nrt3=N TO! KJtL NO£bN03
TOTAL N N-TOTAL
MG/L MG/L M(?/L
0.030
0.020K
0.020K
0.020K
U.020K
0.020K
0.050
0.040
0.040
O.U4Q
0.020
0.020
0.020K
0.030
0.000
O.nOO
O.«00
0.800
O.lOO
O.aOO
0.400
0.300
0.300
0.300
0.200K
0.200
O.OOOrt
0.200K
0.200
0.210
0»200
O.?00
0.200
0.190
0.210
0.090
0.090
0.110
0.120
0.16U
0.160
0.160
0.160
00671
PnOS-DIS
MG/L f
0.015
0.009
0.008
0.011
0.003
0.006
0.017K
0.01*
0,015
0.013
0.002
0.002K
0.002K
0.002*
0.003
00665
DATE TI^E DEPTH PHOS-TOT
FKO^ OF
TO DAY FEET MG/L P
75/02/26 14 20 0000 0.02«
1<* 20 OuO'i u<,02 7
14 20 0017 0.033
14 20 0026 0.027
14 20 003e 0.029
14 20 004o 0.026
75/06/12 13 55 0000 O.Olc1
13 55 000^- joOlj
13 55 0020 0.011
13 55 004b u.Oll
75/12/02 15 00 0000 O.Olj
lo 00 000^ u.Oln
15 00 0030 u.OlT
IS 00 0050 fi.01v
32217
CHLfiHHYL
A
UG/L
5.5
00031
INCDT LT
K VALUE KKCHN TO BE LESS
THAN INDICATED
-------
r-TOrffi ktfrJItVflL LjATt
MATL tUTRGr>i-uCA"' {uf
fc.^A~LAS VEGAS
35 23 *500 114 37 10oO 3
LAKE '-tOKAV'E
04015
uaTE
TO
OK
DEPTH
FEET
75/0^/26
75/06/12
73/12/03
10
10
10
10
10
10
10
11
11
11
11
11
11
11
09
09
09
09
09
09
40
40
40
40
*0
40
40
00
oo
00
00
00
00
00
30
30
30
30
30
30
0000
OOU5
0018
0031
00*4
0064
0084
0000
0005
0015
0030
0053
0070
0087
0000
OOOS
0015
0025
0050
0079
00010
wATtft
TtMP
CENT
7.6
7^2
7.2
7.1
7.1
r.i
22.1
22.0
21.4
20,2
14.2
13.8
13.5
14.4
14.4
14.3
14.3
14.3
14.3
00300 00077
L/0 Ti"Ai\S^
StCCnl
Mb/L INCHES
1U2 I''
idb
10.6
10.':
10.2
10.2
9.0
7.0
Vo*
8.5
7.8
7oO
7.0
14
9.6
9.4
9.6
9.6
9»3
FIELU
1122
i 100
1100
1106
1090
1071
1058
1040
1014
881
874
876
850
o50
851
849
848
HEMALEb
0088
00400
PH
su
8.60
8.60
8.60
8.50
8. SO
8.50
8.50
8.65
8.7o
8.75
8.60
8.20
8,15
8.10
8.00
8.00
8.00
a, oo
8.00
7.90
FEET Ui
00410
T ALK
CAC03
Mb/L
139
140
139
141
1*1
141
142
128
130
130
132
139
139
140
12?
127
129
128
126
132
2111202
I'M CLASS 00
OOblO 00625 0063d
I-4HJ-N TOT KJtL N02kNu3
TOTAL N N-TOT4L
Mfa/L MG/L M6/L
0.020K
0.020K
0.020
0.020
0.030
0.020
0.020
0.020K
0.040
0.040
0.050
0.050
0.050
0.060
0.030
0.020
0.030
0.020
0.020
0.030
0.600
O.»00
0.300
0.400
0.600
0.600
0.300
O.SOO
0.200
0.300
0.300
0.300
0.300
0.200
0.200K
0.200K
0.200
0.200K
0.200
0.2001V
0 . ? 3 0
0.^20
0.230
0.230
0.230
0.230
O.?30
0.0*0
0.030
0,030
0.070
0.280
0.300
0.310
0.180
0.180
0.180
0.180
0.180
0.190
(.Oo 71
u-» r-^u
0.014
0.016
0.009
0.015
0.01*
0.016
0.012
0.006
0.004
0.003
0.003
0.002
0.012
0.015
0.002*
0.002*
0.002K
0.002K
0.002
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
Si,-:.' -ti-'t^AL. JML
sAT,. •-. i\ ~''.-nIC.4
0000
0005
OOlb
0030
0053
0070
0087
0000
OOOD
OOls
0025
OObO
0079
Go
Oo
0.
Uo
0.
0.
0.
do
0.
0.
u .
0.
Oo
0.
0.
0 0
Oo
0.
0.
0.
w33
035
030
02t>
027
030
025
u 12
014
012
012
009
Oil
012
016
016
015
014
015
016
23 45oO 114 37 10.0 3
t
04015
lltPALtS
oo8« FEET
110141
CLASS 00
32217
INCL. F LT
A
Ob/L
5.7
-------
$u-0
8.60
8.50
8.50
8.50
8.7b
8.65
8.70
8.60
8.20
8.20
8.20
8.7u
7.30
8.00
7.90
7.90
7.90
7.90
138
135
137
138
139
139
138
128
129
125
130
135
134
136
1J2
131
130
128
128
12f
129
0.020K
0.040
0.020K
0.020
0.030
0.030
0.030
0.030
0.030
0.020
0.030
0.040
0.040
0.040
0.020
0.020
0.020
0.020
0.020
0.020
0.030
0.500
0.500
O.bOO
0.500
0.300
O.tOO
0.400
O.bOO
0.500
0.500
0.500
0.500
0.400
O.bOO
0.200K
0.200K
0.200*
0.200
0.200K
0.200K
0.200
O.?30
0.2JO
O.?20
0.220
0.220
0.230
O.?30
0.0*:OK
0.040
0.020K
0.080
0.280
0.290
0.300
0.190
0.190
0.190
0.190
0.190
0.190
0.190
0.011
0.041
0.017
0.017
0.012
0.017
0.015
0.014
0.011
0.014
0.017
0.021K
0.011
0.022
0.002K
0.002K
0.002K
0.002K
0.002*
0.002K
0.002K
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
NATL tUTKC-HlC-riU
12. C i
KOHAtfc.
39
llEPALtS
009«
oepTh CLASS oo
ro
01)'---
HKUb-fOl
/•3/02/2& u1-;
.)•*
uv
o ••»
111
t)~t
Ov
?-j/u6/l«f 1C
1U
10
10
10
10
10
't/12/03 10
10
10
10
10
10
10
50
SO
50
50
50
50
60
30
30
30
30
30
30
30
00
00
00
00
00
00
00
000.:
ooo-
oo^;
003''
005-
00V-
OOSi"
0000
oou^
OOlt.
OOJO
0053
0075
00^4
0000
ooos
0015
0025
0050
OOfa-3
OOeb
0
0
(1
0
0
u
u
0
(J
u
0
0
0
0
0
0
0
0
0
0
0
. •: 3 0
.Gf-d
. Cbri
.1! J3
• unri
. \:e!d
. i'^v
.ull
.01 j
.013
.018
.015
.017
.085
.014
.016
.017
o015
.017
.014
.Ul1-
/ 00 131
INCUT LT
A -JE.".
Ub/i_
5. /
3.7
-------
-3LJKV!-.
uM t T 1 'E
l-r-l.'V U!
! i DAT
Ib/Qe1/**- Ob 45
Ob 45
08 45
Ob 45
08 45
06 45
?b/uo/12 10 00
1000
10 00
10 00
10 00
75/12/03 10 30
10 30
10 30
10 30
10 30
OATh Tl'lt
Fr-'O"! Gl-
FJ DAf
(^/Od/'tLk 08 4b
08 45
08 45
OH 45
08 45
08 45
/3/uo/l^ 10 00
10 00
10 00
10 00
10 00
/->/l2/Oj 10 30
10 30
10 30
10 JO
Of.->TH
FLcT
0000
O./Ob
0016
0030
UU45
Ou59
0 (J 0 0
O')05
001^
OOJ5
0054
0000
0005
0015
0030
0060
Ot-PTh
FtcT
!.'')00
ii')05
OOlo
0030
0045
0059
l/UOO
0005
0015
0035
0054
ODOO
GO OS
CM) 15
uo30
10 JO 0)60
0 0 J 1 U
wMtr>
rt'-P
CtuT
7.6
6.1
8.1
8.0
8.0
7.5
21.2
20.8
^0.1
ia.l
13.2
13.3
13.2
13.0
12.9
12.8
OOR65
HHOS-TOT
Mb/i_ P
0.038
0.032
0.033
0.044
O.OJO
0 .031
0.013
0.017
0.019
0.015
0.016
0.015
1 • . 0 1 7
C .016
0.016
i. . 0 1 9
OUJUO
uO
Vij/L
11.2
11.4
1 1 .U
11.0
ID. 4
10.2
9.0
O.6
9.0
rt«4
t). 0
10°8
10.6
10.8
10.6
32217
ChLHPnYL
A
Ou/L
11.4
3.3
•». /
ui)077
T^A:nO
MG/L H
0.013
0.016
0.012
0.017
0.011
0.011
0.015
0.017
0.006
O.OOb
0*011
0.002*
0.002*
0.0 02*
0.002*
0.002*
-------
LiATt 7:t.'I'./e-n
•oATL EOT •
UATE
F-Ov
ro
75/02/2fo
75/06/12
VD/12/03
DATE
FKO-!
ro
75/02/26
75/06/12
75/12/0 3
'EGAS
TI.1£ DEPTH
OF
UAY FEET
14 AO 0000
14 10 0005
14 10 0015
14 10 0025
14 10 OObO
14 10 00o5
06 45 0000
08 45 0005
08 45 0015
08 45 0030
08 45 0047
11 30 0000
11 30 0005
11 30 0015
11 30 002b
11 30 0035
11 30 0050
TIME DEPTH
OF
UAY FttT
14 10 0000
14 10 0005
14 10 OOlb
14 10 0025
14 10 0050
14 10 0065
08 45 0000
08 45 0005
08 45 0015
06 45 0030
06 45 0047
11 30 0000
11 30 0005
11 30 OOlb
11 30 002b
11 30 C035
11 30 OObO
00010
TtMP
CENT
Hob
11.6
11.4
11.4
11.2
11.0
21. d
18.7
12.7
12.3
12.3
13.5
13o5
13.4
13.3
13.3
13.3
00665
PriOb-TOT
rtii/L P
0.050
0.035
0.039
0.037
0.036
0.039
0.02
=;LCCnI FIELO CAC03 TOTAL
"16/L INCHtS
114
lu.2
10. 0
9.rt
10.0
9.6
9.4 148
9.0
•y = 4
9.2
9.2
9.2 eLlb
8.6
8. e
9.0
9.0
9.*
32217 00031
CHLKPHYL INCDT LT
A rffMNlNti
UO/L PERCENT
<* . O
0.9
0.9
MICKOMI-0
329
6^9
625
824
b!9
016
1031
960
850
823
825
810
813
606
805
806
809
StJ
f.20
8.25
6.20
8.20
8.25
8,eib
8.80
8.30
8.30
6.25
8.25
7.60
7.70
7.70
7.70
7.70
7.70
M6/L
135
133
133
134
134
135
133
137
139
Uo
139
139
137
13o
141
137
136
Mfa/L
Oo020
0.020
0.020
0.020
00020r<.
0.020K
0.040
0.030
0.030
0.020
0,020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K.
00630
<02^N03
N N-TOTAL
MG/L
Oo900
0.400
0.300
0.400
0.300
0.400
O.sOO
0.4UO
OoJOO
0.400
0.200
0.200K
0.200
O.^OOK
0.200K.
0.200
0.200
MG/L
0.340
0.340
0.350
0.360
0.340
0.350
0.080
0.210
0.360
0.370
0.370
0.4^0
0.410
0.400
0.400
0.400
0.410
K VALUE KNOWN TO BE LESS
THAN
INDICATED
0 . Ol«
0.027
0.020
0.019
0.017
0.016
0.014
0.021
0.029*
0.029'.
0.028"
O.OOo
0.010
0.010
0.006
0.008
0.008
-------
T t
l^/ JO/ if
75/12/03
itrt
Iu
f b/12/G
CuOl'J
1 I 3 -J 0
Tl-
C-'
14
1*
14
It
1*
i"
o->
Ot
()•»
0^
0^
09
11
11
11
11
11
11
r i^
ji-
L^
It
14
1 +
1 4
14
It
0*
(S-i
o
0-^
0 V
(j -i
11
1 1
i ;
1 L
1 1
u
rl LEPT<-
rttT
bO COO1'
30 000^
bO OOlo
50 002^
30 OObO
50 00b*i
3 U 0 0 J 0
30 0003
3d OOlb
30 0030
30 OObc
30 00?4
00 0000
00 0005
00 OUla
00 0030
00 OObO
00 006-3
•t uEPTn
• KttT
50 0000
bO 000^
50 OOl'r
30 0025
50 OObO
50 0 U b «
30 OOUO
30 OOOb
30 001^
30 00 JO
30 OObO
30 0 0 7 4
00 OOOJ
00 0 U (j ^
OU 001 ••
00 0030
00 0 0 3 u
00 0 Obt;
-AltK
CcNT
11.3
11.0
10.9
1 0 ,4
10. ft
10. 3
21.7
21,4
20.7
14 .4
13.4
13.4
12.9
12. V
12.9
12. B
12.6
12.6
OObbb
PHO-.-TOT
Mb/L *
u.037
u . u j 6
0.037
(t, DJb
O.o43
u .OtO
U . u 1 7
0.020
11.023
0.020
•).U25
o . f, 2 5
0.0 14
1. L l4
ij . i-; 1 J
n. nib
U . u 1 6
iJ.ulb
iu
'o/.
I 'j . t
IC.e
i 0 » *3
i 0 . •*
9.4
•f . »
l.t
*? » i'
^.0
8.8
10.0
10.0
10.0
10.0
10.2
10.0
3,^17
ChLKHnYL
A
U-j/L
e.3
1 .0
3.*
y *v G b ',» 7
35 J-> 40,0 1H
LAi>,£ MOHAWt
040 ib AKl/Q'NA
27.0 3
1101*1
11EPALES
3111202
0072 F££F JtPTtt CLASS
00077 OOOSJ4
TKAiMjH CM.iUClVY
•=tCCn! FIKLU
IiNCntS MK.HOMhU
84 bid
rt io
612
611
607
802
18 1043
1040
1024
68b
b67
860
180 804
799
799
798
795
795
0040U
PH
SU
8o40
6.40
6.40
8.35
8.33
£.30
8.8b
6.7b
8.7b
6.40
8.30
8.30
7.80
7.90
7.60
7.90
7.90
7.90
00410
T ALK
CAC03
Mo/L
137
i3b
136
137
137
135
133
132
132
139
131
136
141
139
139
141
143
140
00610
NHJ-N
TOTAL
Ho/L
U.020K
0.020K
0.020K,
0.020
0.030
0.020K
0.030
0.030
0.030
0.040
u.040
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00
00623
TOT KJtL
N
MG/L
0.300
0.20U
0.300
0.300
0.300
0.20U
O.bOO
O.bOO
O.bOO
0.400
0.400
Oo400
0.200K
0.200K
0.200K
0.200
0.200K
0.300
00630
N02S.N03
N-TOTAL
MG/L
0.310
0.310
0.310
0.320
0.320
0.350
0.050
0.040
0.050
O.?80
Oa320
0»320
0.390
0.380
U.3BO
0.380
0.370
0.370
00671
PnOS-OIb
ORTnO
MG/L P
0.013
Oo013
0.008
0.018
0.016
0.016
0.006
0.011
o.oai
0.015
0.029
0.032K
0.003
0.007
0.005
O.OOb
0.004
0.003
00031
INCUT LT
PEKCtNT
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
tTL - UT-< ;-
1-A-LlS tft.
Jr- 1
Ol-ObOo
3b 35 35.0
L.AKfc. «(,HAtft
2^.0 3
F££T
CLASS 00
K
i»
I-*
* ' li: \
I 0
Ojfebo
•j t <; i>
"( L' 'J ^>
f 0 •* 'J
U 'J ') 3
•I IJ -< 0
Olc1'
0 u 0')
u.022
U.O J7
(j.036
G.ljJO
O.I
I) . 0 1 1
U.013
I-
U
1*
1A
O'J
09
0V
09
09
m
u--
lf-.<
<^L
idO
30
^o
00
00
00
on
00
u "•
on
00
C0-»i)
OObi;
OO'jO
out
0000
OOOb
OOlo
OOttb
OOsO
U •) 7 S
00^0
01 IT
o.oia
0.010
0.011
(i.Oll
U <>0l9
0.016
O.Olb
o.ois.
O.Olb
o.ois
O.Olb
O.OIS
00031
LT
U
-------
UATt Tl't ,)tPT-
H-cijM Or
TO DAY f-btT
0 0 1 0
00300
(JO
MG/L
7b/o2/2f 14
14
14
14
14
14
14
7b/.)b/12 14
14
14
14
14
14
14
fb/12/03 09
09
09
09
09
09
09
09
b5
•3:?
bb
5^
bb
br>
5b
20
20
'fii
20
20
20
20
00
00
00
00
00
(Ml
DC
()'.
0 u i) 0
(|.)01
Oui /
U ..i "» 0
doo1?
o -j -» •;
()12'i
0 ,•> u o
OOOb
0020
0041)
0062
0090
011*1
0000
OOOb
OOlb
002b
OubO
H07b
0 j ^ t '
i) 11 -
7
7
7
7
6
6
6
22
22
20
19
14
13
13
14
14
14
14
14
14
14
14
.3
.9
.8
.4
.8
.7
.7
.5
.0
.5
.5
.6
.8
.8
.2
• 2
.2
.2
.2
.2
.2
.2
11
11
11
11
11
10
10
9
•i
y
3
y
7
7
9
9
9
9
9
V
9
.
.
.
a
.
0
.
.
.
.
«
.
0
.
.
.
.
.
.
.
•
2
4
2
0
0
b
4
2
4
U
b
0
2
2
8
6
6
6
a
4
8
CNOuCTVY
StCOnl
i»4
120
3b 35
MOHAVt
O'iUlb
lltHALtS
0124 FttF
00400
PH
bU
00410
T ALK.
CACU 3
35 22»0 3
110191
2111202
JC.I-TM CLASS 00
00610 00623 00630 U0b7i
NH3-N TOT KjtL N02t*NOJ PHOS-OIS
TOTAL N N-TOTAL 0"TrtO
MG/L MG/L MG/L M<3/t_ *
ilub
1110
1110
1092
1111
lt)V2
1100
1 o 7 1
iU4b
1019
99b
894
e76
876
847
«47
84b
646
84b
H4b
tt47
846
8.6u
8.60
8.55
S.bb
8.bb
8.S5
H.bO
8.7b
B.75
fa.?0
8.60
8.20
8.20
8.75
6.00
8.00
7.80
8.00
8.00
8.00
7.90
8.00
143
142
143
138
140
140
140
132
133
134
139
142
143
I4b
122
121
120
120
121
123
125
12b
0.020K
0.020K
0.020K
0.030
0.030
0.030
0.030
0.040
0.040
0.040
0.040
0.060
0.050
0.040
0.030
0.020
0.020
0.020
0.020
0.020
0.020
0.020K,
0.900
O.tfOO
O.bOO
0.700
O.HOO
O.MOO
0.900
0.400
0. JOO
0.300
0.300
0.400
0.300
0.300
0.300
0.200
0.200
0.200
0.300
0.200K
0.200*
0.200*
0.250
0.220
0.220
0.250
0.220
0.220
0.220
0.040
0.040
0.070
0.100
0.270
0.310
0.300
0.170
0.170
0.160
0.160
0.170
0.160
O.lbO
0.180
0.009
0.010
0.010
0.007
0.015
0.008
0.015
0.01 7K
0.006
0.012
0.014
0.006
0.014
O.Olb
00003
0.002K
0.002K
0.002K
0.002K
0.002*
0.002K
0.002K
K VALUE KNOMN TO BE LESS
THAN INDICATED
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STORF.T ftt
,VATL E'JTSOPfilCATIO".
EPA" LAS VEGAS
:fc/l;./30
DATE TIME DEPTH N02*.N03
FHOM OF
TO OAY FEET
74/1Z/07
7b/02/15
75/03/15
75/04/11
75/04/26
75/05/10
75/05/24
75/06/14
75/07/05
'b/06/23
V5/09/13
75/10/18
75/11/15
09
09
09
03
09
08
08
09
oa
09
09
09
08
05
10
10
50
15
45
50
30
30
05
00
20
45
o^ceai
35 11 33eC U4 3<> 10.0 4
COLORADO NltftK
04 Tob OAVIS 1>AM
0/LAKE MOHA*t 11
BOAT RAMP IN SKTSKN PAK CO
SltPALES ZlllZU
0000 FEET JEHTH CLASS 00
btLO UAM
0630
4.N03
OTAL
l(j/L
0.200
0.200
0.208
0.200
0.200
O.
UXTr"Ci
MG/L P
0.005
0.008K.
O.OOhK
Oc005K
0.005K
0.005K
0.005
0.005
0.010
0.010
0.010
0.005
0.005*
00665
PHOS-TOT
MG/L f
0.020
O.OK'K
0,040
0.030
0.010K
0.010K
0.017
0.01 OK
0.030
0U020
0.020
0.040
0.010
K VALUE KKOyN TO BE LESS
THAN INDICATED
-------
STGWET RETRIEVAL UAfF. 76/11/30
NATL EUTrtOPhlCATIGN SURVEY
tPA- LAS
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/01/18 10 30
75/05/17 10 00
75/06/17 12 00
75/07/ltt 09 00
Q406A2
36 00 b5.0 114 44 16.0 4
COLORADO KlvER
04 MOHAvE CO HiiV HP
T/I.AXE MOMAVt
8ELO* MOOVtR DAM
11EPALES 31U204
0000 FEET DEPTH CLASS 00
00630
N02&N03
N-TOTAL
MG/L
0.336
0.540
0.47Q
0.520
00625
TOT KJEl
N
MG/L
3.100
0.500
1.100
1.500
00610
NH3-N
TOTAL
MG/L
0.024
0.015
0.015
0.012
00671
PHOS-UI5
ORTHO
Mli/L P
0.020
O.OOS
0.005
0.015
0066b
PHOS-TOT
«MG/L P
0.030
U.030
0.040
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1975
STATE OF ARIZONA
Mean or median values for six of the key parameters evaluated
in establishing the trophic conditions of Arizona lakes sampled
are presented to allow direct comparison of the ranking, by parameter,
of each lake relative to the others. Median total phosphorus, median
Inorganic nitrogen and median dissolved orthophosphorus levels are
expressed in mg/1. Chlorophyll a_values are expressed in yg/1.
To maintain consistent rank order with the preceding parameters,
the mean Secchi disc depth, in inches, is subtracted from 500.
Similarly, minimum dissolved oxygen values are subtracted from 15
to create table entries.
-------
LAKE DATA TO 8E 'JSEO IN RANKINGS
LAKE
CODE LAKE NAME
0401 BIG LAKE
0402 FOOLS HOLLOW
0403 LAKE HAVASU
0404 LUNA LAKE
0405 LYMAN LAKE
0406 LAKE MOHAVE
-------
r, -*»»>-..••
LAKE MOS-iAVE
LAKE
C4l§ P.90:^tft'LV LAKE
Ckl/; SAW S*SLO
TCsf/, T XMCFsS M ' r"'A?i 2£C
/};,' J l^- 4" 2 5S (6) C I A}
63 I 75 6 ', 0,' S7 J 3>
CHL^A K!I\ DC
?;.» c ss TT c a?
AS S 2S 9 C 3i»
SS J 6S 64 C 7J
c^ : ?J 4i ; 4J
GS « 9J 7? « G)
3f> i 4J . SI C ^0)
2.7 i Zf C t 0)
3/. < 10* 4?, 5 45
^ i 61 §5 J 6)
45 ? SI 2? C 31
5 * iJ 13 C 3J
100 C J,l> IOC C il«
DISS ORTHQ P
72 (
13 (
91 C
0 (
9 J
32 (
100 C
3?. 4
4S C
64 «
S5 C
BH I
Ql
2J
1CI
9>
.U
3J
111
3J
5J
K
e?
9J
------- |