EPA 908/5-79-004
                        DECEMBER 1979
AMMONIA INVESTIGATIONS
                      IN THE
          COLORADO RIVER

          GRAND JUNCTION
                AND FRUITA,
                 COLORADO
                          y&iM
      	              : , l^KliMMIO) ]^m
      U.S. ENVIRONMENTAL PROTECTION AGENCY
.fe*
          , p. -•.•$$$»'* REGIOM
           *
      ENGINEERING-SCIENCE
        DESIGN • RESEARCH - PLANNING
    2785 NORTH SPEER BOULEVARD • DENVER, COLORADO 80211 • 303/455-4427
          OFFICES IN PRINCIPAL CITIES

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                                                           EPA 908/5-79-004
                                                           December 1979
                        FINAL REPORT

         AMMONIA INVESTIGATIONS IN THE COLORADO RIVER
             GRAND JUNCTION AND FRUITA, COLORADO
                             by

Joyce S. Hsiao, Bahman Sheikh-ol-Eslami and Leslie H. Bothan
                     Engineering-Science
                   2785 N. Speer Boulevard
                   Denver, Colorado  80211
            Contract Number 68-01-4611, D.O.W. 3
                       Project Officer

                      Martha Rosenberg
              Environmental Evaluation Section
     U.S. Environmental Protection Agency, Region VIII
                  Denver, Colorado  80203
     U.S. Environmental Protection Agency, Region VIII
                  Denver, Colorado  80203

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 This  report  has  been reviewed by  the  Region VIII
 Office  of  the  U.S.  Environmental  Protection Agency
 and approved for publication.   Mention  of  trade
 names or commercial products  does not constitute
 endorsement  or recommendations for use.
This document is available to the public through
the National Technical Information Service,
Springfield, Virginia  22161.

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                                FOREWORD
     This report includes and updates all data presented in a preliminary
report entitled, Ammonia Toxicity Study in the Colorado River Near Grand
Junction, Colorado, which was issued in April 1979.  Data management and
analysis for this report are identical to that in the preliminary report
with one refinement:  time adjustments for un-ionized ammonia were recal-
culated on the basis of the trend in diurnal temperature fluctuations ob-
served during the course of the study instead of solely on the basis of
winter intensive survey results.  This report extends the analysis from
the preliminary report.  Historical water quality data are compared to
the data collected during the 13-month study to determine representative
river conditions.  These representative conditions, together with the rec-
ommended instream ammonia criterion, enable the calculation of allowable
ammonia loadings.

     A meeting was held on 18 December 1979 at the Region VIII Office of
the Environmental Protection Agency to discuss the preliminary results of
this study.  The following agencies were represented:  U.S. Fish and Wild-
life Service; Colorado Department of Health, Water Quality Control Divi-
sion; Colorado Division of Wildlife; Henningson Durham & Richardson; City
of Grand Junction; U.S. Environmental Protection Agency; and Engineering-
Science.  The applicability of the 0.02 mg/A un-ionized ammonia criterion
was discussed.  It was pointed out by the representative of the U.S. Fish
and Wildlife Service that fish toxicity bioassay studies are now underway
to verify the applicability of this criterion.  The Colorado Department
of Health representative indicated that his department would probably uti-
lize the 0.06 mg/fc criterion for warm water fishery protection in issuing
a permit for the Grand Junction treatment plant, pending further bioassay
results on fish similar to those deemed to be threatened and endangered.
A study of nonpoint sources of ammonia into the Colorado River is also
currently in progress.
                                   iii

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                       TERMINOLOGY AND ASSUMPTIONS
     The terminology used in this report for the chemistry of ammonia
follows the convention used in Ammonia Toxicity (W. Willingham, 1976).
Thus, "ionized ammonia" describes the chemical species NH^ , and "un-
ionized ammonia" describes NH3.  "Total ammonia" or "ammonia" describes
the sum of both forms (NH^+ -1- NHj) .  For all three forms, ionized, un-
ionized and total ammonia, concentrations are expressed as mg/?. NH^-N.

     For the purpose of this survey and report, it is accepted and as-
sumed that 0.02 mg/& as N is the highest concentration of un-ionized am-
monia that will assure safety to the endangered fish species of concern.
While this assumption may be questioned for certain conditions, use of
a criterion is necessary to establish allowable ammonia loadings and has
no bearing on the representative background conditions determined from
the results of this survey.
                                   iv

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                            TABLE OF CONTENTS
Foreword
Terminology and Assumptions
Acknowledgments
SECTION 1
SECTION 2
SECTION 3
SECTION 4
SECTION 5
SECTION 6
INTRODUCTION AND SUMMARY
   Introduction
   Summary

DESCRIPTION OF PROJECT
   Background
   Other Water Quality Studies Near Grand Junction
   Ammonia Toxicity
   Objectives
   Approach

MONITORING PROGRAM:  METHODS, RESULTS AND
 DISCUSSION
   Methods of Water Sample Collection and Analysis
   Results of Water Quality Sampling
   Discussion of Water Quality Results
   Methods of Flow Determinations
   Results of Flow Determinations
   Discussion of Flow Determinations

HISTORICAL PERSPECTIVE ON REPRESENTATIVE CONDITIONS
 IN COLORADO RIVER NEAR GRAND JUNCTION
   Water Quality
   Flow

AMMONIA LOADING ALLOCATIONS
   Conclusions and Recommendations
   Future Considerations

REFERENCES
iii
 iv
  x

  3
  3
  4

 11
 11
. 14
 16
 17
 18
                                                                         27
                                                                         27
                                                                         29
                                                                         31
                                                                         56
                                                                         57
                                                                         57
  69
  69
  75

  91
  93
 100

 105
APPENDIX A
APPENDIX B
APPENDIX C
APPENDIX D
APPENDIX E
WEEKLY WATER QUALITY DATA
ADDITIONAL HYDROLOGIC DATA
SAMPLE CALCULATION FOR AMMONIA LOADING ALLOCATIONS
DYE TRACER STUDY
INTENSIVE SURVEYS
 109
 177
 191
 195
 207
Technical Report Data
                                                     215

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                      TABLE OF CONTENTS (continued)

                             LIST OF TABLES

Number                            Title                                 Page

  1              Summary of Monthly Representative Background
                 Conditions and Ammonia Loading Allocations                7

  2              Gauged Flows at Stations  1,4,6,7 and 8                  58

  3              Discharge Flows at Grand  Junction Treatment Plant       60

  4              Monthly Ranges and Medians of Colorado River Water
                 Quality Data, 1968-78, at Three Stations  near
                 Grand Junction                                          70

  5              USGS Gauging Stations                                    76

  6              Seven Day Low Flows Expected once in 10 Years           78

  7              Average Diversions Grand  Junction Area                  80

  8              Summary of Estimated 7 Day Low Flows to be
                 Expected once in 10 Years for Colorado River            82

  9              Representative Monthly Background Conditions
                 in the Colorado River                                    92

 10              Maximum Ammonia Loading Allocations to the
                 Colorado River                                          94

 11              Maximum Ammonia Concentrations in Wastewater
                 Discharged to the Colorado River                        97

 12              Ammonia Loadings into  Colorado River from Grand
                 Junction and Fruita Wastewater Treatment  Facilities
                 in 1978-79                                              98

 13              Maximum Ammonia Loadings  to the Colorado  River
                 for the 0.06 mg/Jl Standard                             101
                                   vi

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                     TABLE OF CONTENTS (continued)

                            LIST OF FIGURES

Number                           Title                                Page

  1              Location of Study Area                                 6
  2              Detail of Sampling Stations 3,4 & 5                    20

  3              Detail of Sampling.Stations 6,7,8,9 & 10               21

  4              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during September 1978         33
  5              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during October 1978           34
  6              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during November 1978          35
  7              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during December 1978          36
  8              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during January 1979           37

  9              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during February 1979          38

 10              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during March 1979             39
 11              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during April 1979             4°
 12              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during May 1979               41
 13              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during June 1979              42

 14              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during July 1979              43
 15              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during August  1979            44
 16              Un-Ionized Ammonia Range and Median Concentrations
                 along the Colorado River during September 1979         45

 17              Un-Ionized Ammonia Concentration Weekly Range and
                 Median  from September  1978 'through September 1979
                 at Station 1,  Colorado River                           46
 18              Un-Ionized Ammonia Concentration  from September
                 1978 through September 1979 at Station  2, Grand
                 Junction Sewage  Effluent                               47
 19              Un-Ionized Ammonia Concentration  Weekly Range and
                 Median  from September  1978 through September  1979
                 at Station 3,  Colorado River                           48
                                  vii

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                     TABLE OF CONTENTS (continued)

                      LIST OF FIGURES (continued)

Number                           Title                                Page

 20              Un-Ionized Ammonia Concentration  from September
                 1978 through September 1979 at Station 4,  Persigo
                 Wash                                                  49

 21              Un-Ionized Ammonia Concentration Weekly Range and
                 Median from September 1978 through September 1979
                 at Station 5, Colorado River                          50

 22              Un-Ionized Ammonia Concentration  from September
                 1978 through September 1979 at Station 6,  Fruita
                 Sewage Effluent                                       51

 23              Un-Ionized Ammonia Concentration Weekly Range and
                 Median from September 1978 through September 1979
                 at Station 7, Colorado River                          52

 24              Un-Ionized Ammonia Concentration  from September
                 1978 through September 1979 at Station 8,  Little
                 Salt Wash                                             53

 25              Un-Ionized Ammonia Concentration Weekly Range and
                 Median from September 1978 through September 1979
                 at Station 9, Colorado River                          54

 26              Un-Ionized Ammonia Concentration Weekly Range and
                 Median from September 1978 through September 1979
                 at Station 10,  Colorado River                         55
 27              Gauged Flows for Colorado River at Broadway Bridge    61

 28              Gauged Flows for Colorado River at Hwy. 340 near
                 Fruita                                                62

 29              Gauged Flows for Persigo Wash at  Interstate 70        63

 30              Gauged Flows for Little Salt Wash  at U.S.  Hwy.  6      64

 31              Gauged Flows for Fruita Lagoon Outlet                 65

 32              Water Temperatures Monthly Median  and Representative
                 Conditions along the Colorado River near Grand Junc-
                 tion and Fruita                                       71

 33              pH Monthly Median and Representative Conditions
                 along the Colorado River near Grand Junction and
                 Fruita                                                72

 34              Total Ammonia Monthly Median Concentrations and
                 Representative Conditions along the Colorado River
                 near Grand Junction and Fruita                        73
                                 viii

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                     TABLE OF CONTENTS (continued)

                      LIST OF FIGURES (continued)

Number                           Title                                Page

 35              Estimated Seven Day Low Flow Profiles,  Colorado
                 River                                                 85

 36              Estimated Seven Day Low Flow Profiles,  Colorado
                 River                                                 86

 37              Estimated Seven Day Low Flow Profiles,  Colorado
                 River                                                 87

 38              Estimated Seven Day Low Flow Profiles,  Colorado
                 River                                                 88

 39              Ammonia Loading Allocations in the Colorado River     96
                                  ix

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                             ACKNOWLEDGMENTS
     This report has been prepared in close coordination with Ms. Martha
Rosenberg, EPA Project Officer; and Mr. W. Thomas Willingham, EPA Techni-
cal Director.  The project manager for Engineering-Science is Dr. Bahman
Sheikh, who has been assisted by Ms, Joyce Hsiao, project engineer.  The
Engineering-Science project team includes:  Messrs. Scott Needham and
Jack Laurie, field technicians; Dr. Luciano Meiorin, dye tracer study;
Mr. Thomas Jones, computer programmer, with computer typing assistance
from Ms. Christina Perez; and Messrs. Thomas Helbig and Thomas Fall, and
Ms. Claire Conboy and Laura Selfridge, chemists.  Under the direction of
Mr. Leslie H. Botham, Leonard Rice Consulting Water Engineers of Denver
have provided river flow determinations.

     The following persons have provided valuable information on back-
ground materials and historical data:

     o  Jim Patterson, Director of Public Works, Grand Junction;

     o  David Crow, Town Administrator, Fruita;

     o  Bob Demos, Colorado West Area Council of Governments,
        Rifle;
     o  George Kidd, Biologist, Grand Junction;
     o  Karl Henrichsen, Henningson, Durham & Richardson, Inc.,
        Denver;

     o  Timothy Carlson, C-E Maguire, Inc., Denver;

     o  Robin Knox and John Woodling, Colorado Division of
        Wildlife, Denver; and
     o  William D. Clark and John Gray, Colorado Division of
        Wildlife, Grand Junction.

     The authors wish to thank Ms.  Teri Schadeck for the graphic art work
and Ms. Melinda Bury for the coordination of report production.

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        SECTION 1




INTRODUCTION AND SUMMARY

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                                SECTION 1
                        INTRODUCTION AND SUMMARY

INTRODUCTION
     Near the western border of the State of Colorado, the Colorado River
is the habitat of four threatened and endangered fish species as well as
the receiving water course for wastewater effluent from the cities of
Grand Junction and Fruita.  The major population center for Western Col-
orado, Grand Junction is part of the productive agricultural region known
as the Grand Valley.  Located nearby are large deposits of oil-bearing
shale formations which, if developed as an energy resource, could lead
to tremendous population growth before the end of the century.  Yet wheth-
er or not oil shale is developed, projected increases in wastewater flows
indicate that ammonia concentrations in the reach of the river between
Grand Junction and Fruita may exceed levels toxic to fish and other aqua-
tic life, further imperiling the endangered fishes.  Development of oil
shale resources and the resultant population increase could greatly in-
tensify the problem.
     These predictions for ammonia concentrations, identified in the Wa-
ter Quality Management Plan, Colorado River Basin, are based on the esti-
mated background quality of the river as well as on the projected waste-
load.  However, the background quality fluctuates seasonally; at certain
times of the year, the background conditions are likely to lead to toxic
levels of un-ionized ammonia, but at other times, they are not.  Late
summer, usually August and September, when the river flow is lowest, is

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 the most  critical period for potential ammonia toxicity problems.  Thus,
 it has been proposed  that ammonia wasteload allocations for the Grand
 Junction  and Fruita wastewater  treatment facilities be established on a
 seasonal  rather than  a yearly basis.  This would avoid the unrealistic
 and costly "worst-case" condition and at the same time provide year-
 round protection for  the endangered fishes.
     The  purpose of this study  is to determine representative seasonal
 background conditions in this reach of the Colorado River on the basis
 of an intensive monitoring program and a review of the historical data.
 These conditions can  then be used to establish seasonal allowable waste-
 loads which are not expected to cause harm to the threatened and endan-
 gered fish species.   Both Grand Junction and Fruita are in the process
 of upgrading and expanding their wastewater treatment facilities, and
 the level of treatment—with or without ammonia control, seasonal or
 otherwise—must ensure protection of these fishes before federal funding
 can be granted.
     Indigenous to this reach of the Colorado River, the four fish
 species of immediate concern are:  (1) Colorado River squawfish,
Ptychocheilus lucius;  (2) humpback chub, Gila cypha;  (3) humpback
 sucker, Xyrauchen texanus; and  (4) bonytail chub, Gila elegans.  The
 first two fishes are on the United States list of Endangered and
 Threatened Wildlife and Plants, and all four are listed in the State
of Colorado document, "Endangered Animals Cooperative Agreement Ap-
plication; Legal Authority, Program Description and Proposed Research
and Management Plans" (November 1974).

SUMMARY
     The monitoring program was designed to encompass one precipitation
cycle, or water year, beginning in September 1978 and continuing
through the end of September 1979.  Water samples were taken weekly
at ten stations along the river and tributary washes, 35 sites alto-
gether including transect points.  Samples were analyzed for pH, temp-
erature and total ammonia concentration,  which were then used to cal-
culate the concentration of un-ionized ammonia.  In addition, flow was

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gauged monthly at six of the stations.  During the two months of low
summer flow, water sampling was increased to twice weekly and flow gaug-
ing increased to weekly.  Figure 1 is a map of the study area which
shows the location of sampling stations; all collected data are presented
in Appendix A.
     Historical data were analyzed to determine the representativeness
of the collected data (i.e., how typical were the survey results of con-
ditions for the study area).  The historical data examined include:
(1) U.S. Geological Survey (USGS) streamflow data for 1960 to the pres-
ent; (2) water quality data from the Colorado Department of Health for
1968 to 1978; (3) treatment plant records for both Grand Junction and
Fruita for 1977 to 1979; and (4) data from the water quality management
plan, the 208 plan, the facilities plan and the predesign report.
     Representative conditions were selected, in the perspective of his-
torical data, to describe a combination of conditions that would produce
conservative, but not necessarily worst-case, estimates 'Of monthly un-
ionized ammonia concentrations.  Temperature, pH, and flow all showed
distinct seasonal patterns.  The highest median value for each month was
selected as representative temperature and pH conditions.  For flow, the
estimated seven-day low flow, to be expected once in ten years, was used.
Total ammonia concentrations did not exhibit a seasonal trend in either
the historical or the measured data.  Therefore, the high median concen-
tration of 0.18 mg/A was used to depict representative background condi-
tions in this analysis.
     From these representative conditions, maximum allowable discharge
of ammonia from the proposed Grand Junction treatment plant and from the
existing Fruita facility were calculated.  These calculations are sum-
marized in Table 1.

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              Big Salt Wash


                  ,. Little Salt Wash
                                Adobe Creek
                                                                   GRAND
                                                                 JUNCTION
                                       Hunter Wash
D
     LEGEND

Existing Wastewater
Treatment Facility
Proposed Wastewater
Treatment Facility
Sampling Station
          SCALE
       1 cm = 0.9 km
       (1 in = 1.4 mi)
                                                      Prltchard Wash
                                                       / Persigo Wash
                                                       /
                                                         Walker State
                                                        Wildlife Refuge
                                      LOCATION OF STUDY AREA
                                                                                    COLORADO
i
                                                                                          CITY OF
                                                                                          GRAND  3
                                                                                    2)-" JUNCTION  -
                                                                                               mE
                                                                                          COLORADO RIVER
                                                                                       Gunnison River

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                                             TABLE 1

                  SUMMARY OF MONTHLY  REPRESENTATIVE BACKGROUND  CONDITIONS
                               AND AMMONIA LOADING  ALLOCATIONS
Month
Temperature Total Ammonia3
°C pHa mg/t
Flow11
«3/S
Maximum Instream
Total Ammonia0
mg/i
Grand Junction Fruit a
Whole River North Channel
January
February
March
April
May
June
July
August
September
October
November
December
5
5
10
14
17
19
21
21
19
15
10
5
8.2
8.2
8.1
7.9
7.6
7.4
7.5
8.1
8.4
8.4
8.3
8.1
0.18
0.18
0.18
0.18
0.18
0.18
0.18
0.18
0.18
0.18
0.18
0.18
50.6
54,0
52.9
39.1
56.6
83.1
28.8
24.1
33.2
44.0
67.7
52.9
34.6
36.5
36.0
28.6
37.1
45.3
22.4
19.8
25.5
34.0
42.2
36.0
50.9
54.4
53.2
43.5
61.2
87.9
33.2
28.5
37.6
48.5
68.1
53.3
1.03
1.03
0.87
1.01
1.60
2.18
1.50
0.39
0.23
0.31
0.56
1.29
aDetermined graphically from Figures 36, 37, 38.
^Estimated 7-day low flow to be expected once in 10 years.
cCorresponds to an instream un-lonized ammonia concentration of 0.02 mg/t.

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                                                                 TABLE 1  (Continued)
oo
Month
Maximum Ammonia Loading
Allocations to the Colorado River1*
kg/day
(Ibs/day)
Grand Junction^

January

February

March

April

May

June

July

August

September

October

November

December

Whole River
3,700
(8,200)
4,000
(8,800)
3,200
(7,100)
2,800
(6,200)
6,900
(15,200)
14,400
(31,800)
3,300
(7,300)
400
(970)
140
(310)
500
(1,100)
2,200
(4,900)
5,100
(11,200)
North Channel
2,500
(5,500)
2,700
(6,000)
2,100
(4,600)
2,100
(4,600)
4,600
(10,100)
7,800
(17,200)
2,600
(5,700)
360
(790)
110
(240)
380
(840)
1,400
(3,100)
3,400
(7,500)
FruitaS

3,700
(8,200)
4,000
(8,800)
3,200
(7,100)
3,100
(6,800)
7,500
(16,500)
15,200
(33,500)
3,800
(8,400)
520
(1,100)
160
(350)
550
(1,200)
2,200
(4,900)
5,100
(1,100)
Maximum Ammonia Concentration
in Wastevater Discharged to the
Colorado River6
mg/4
Grand
Whole River
78

85

68

59

146

304

70

10

3

11

46

108

Junction*
North Channel
53

57

44

44

97

165

55

8

2

8

30

72

FruitaS

782

845

676

655

1,585

3,213

803

110

34

116

465

1,078

                            allocations are the  maximum loadings  from either treatment facility that would result in an instrearo
                      un-ionized anmonia concentration of  0.02 mg/fc.  They are NOT recommended loadings; neither are they  to  be
                      considered additive for Grand Junction and  Fruita.                                                         j
                     eTheae concentrations correspond to the maximum ammonia loading allocations for the design flows of 47,000  m /d
                      (12.5 mgd) for Grand Junction and 4,700 m3/d  (1.25 mgd) for Fruita.  They are NOT recommended concentrations;
                      neither are they to be considered additive  for Grand Junction and Fruita.
                     fGrand Junction wastewater  treatment  facility  only.
                     Spruita wastewater treatment facility only.

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       SECTION 2




DESCRIPTION OF PROJECT

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                               SECTION 2
                        DESCRIPTION OF PROJECT

BACKGROUND
The River
     Water quality standards and stream classification for the study
area are set by the Colorado Department of Health, Water Quality
Control Commission.  In the vicinity of Grand Junction and Fruita,
the water quality for the main stem of the Lower Colorado River is
classified B?—suitable for warm water biota.  The Colorado West Area
Council of Governments has identified "the protection of waters for
fish and wildlife...uses..[as] a major problem in the Lower Colorado
River,"  Specific water quality parameters in the Grand Junction area
which have exceeded state criteria, adopted  in May 1979, include copper,
iron, mercury, zinc, phosphorus, alkalinity, fecal coliform, total sus-
pended solids, manganese, total dissolved solids, magnesium and pH.
     The ammonia toxicity problem in this reach of the Colorado River
was identified in 1975 in Water Quality Management Plan. Colorado
River Basin  (WQMP) , prepared for the Colorado Department of Health.
This plan was designed "to protect the quality of the Colorado River
and its tributaries from point source pollution discharges" and
examined the potential effects of projected wastewater flows for a
twenty-year planning period.  In the Grand Junction and Fruita area,
it was found that ammonia concentrations in the Colorado River will
exceed the "safe" level by the year 1993 with or without the population
increases indicated by oil shale development.  Recommendations were
made for ammonia reduction either by nitrification of the effluent
and/or by relocation of the discharge downstream where there would be

                                   11

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 additional dilution.   Ammonia wasteload allocations were developed
 for summer conditons  in the critical reach immediately downstream
 of Grand Junction.  The maximum allowable ammonia wasteloads were
 defined  as 580 Ibs  (260 kg) NH^-N/day using population projections
 with oil shale development  and 620  Ibs (280 kg)  NH.j-N/day without oil
 shale development.  The WQMP also identifies this reach of  the  river
 as "effluent  limited" and recommends changing the classification  to
 "water quality limited" due to the  high levels of ammonia.  The plan
 designated the Grand  Junction wastewater treatment facilities as  a
 number 2 priority ranking for funding and the Fruita facilities as
 number 4.
 The Grand Junction Wastewater Treatment Facilities and Discharges
      Prepared the same  year as the  WQMP,  Facilities  Plan—Gity  of
 Grand Junction, Colorado, examined  several  alternatives for upgrading
 wastewater  treatment  facilities to  accomodate projected population
 growth for  a  twenty-year planning period.   The City  is currently
                    o
 served by a 22,000 m  /d (5.7  mgd) trickling filter plant in town.
 The population in the planning area was assumed  to increase from
 49,530 in 1974 to 119,000 in  1994.   The recommended  plan proposed to
 modify the  existing Grand Junction  plant  and  to  construct a new plant
 9.5 km (6 mi)  downstream which would discharge into  Persigo Wash, an
 irrigation-return channel tributary to the  Colorado  River.  The new
                         3
 plant  would be a 25,000  m /d  (6.7 mgd)  activated sludge plant.  Pro-
 jected ammonia concentrations  were  calculated  using  this proposed
 scheme.  Due  to numerous uncertainties about  river conditions and am-
 monia  toxicity and the  tremendous cost of ammonia  control,  such pro-
 vision was  not  recommended.   Thus,  ammonia  control was  not  included in
 the  facilities plan.  The plan, however,  recommended  that the City
 request  "this  segment of the  river  be  reclassified or  that  exemption
 for ammonia removal be given."
     The following year  (1976)  EPA  issued a Negative Declaration  on
 the proposed Grand Junction wastewater treatment facility.  The
Negative Declaration indicated  that environmental  impacts of the
proposed project, including the level  of  un-ionized  ammonia, would
not be significant.   Although  the project deviates from the WQMP  with
respect  to ammonia reduction,  the Negative  Declaration accepted the
                                    12

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 recommended plan with the  following  reasoning:   the  first phase of
 construction can be  accomplished with no  significant environmental
 impacts  and can be done simultaneously  with further study  on the  ammon-
 ia toxicity problem.  The  sparsity of water quality data and the  neces-
 sity  for further study precluded the decision requiring  advanced waste-
 water treatment (i.e.  ammonia  control).
      A technical update of the Grand Junction facilities plan was pre-
 pared in August 1977,  entitled Predesign  Report  for  Wastewater Treat-
 ment  Facilities and  Interceptor Sewers.   Water quality problems were
 re-examined,  and additional alternatives, including  land application
 methods,  were evaluated.   Land application  systems were  rejected due
 to  conflicting  objectives  for  salinity  control in the Colorado River
 Basin and the high cost of protecting groundwater supplies.  The
 predesign report resulted  in a recommendation to abandon the existing
 treatment plant (which reached design capacity in 1979)  and  to build
              3
 a new 47,000  m  /d (12.5 mgd) activated  sludge plant  at Persigo Wash.
 Allowable summertime ammonia-nitrogen discharge  concentrations, on
 the basis  of  criteria  developed in the WQMP, were re-calculated to be
 1,170  Ibs/day (530 kg)  at  points downstream of Fersigo Wash, according
                                                             o
 to  the newly  proposed  scheme.  In other words, about 34,000 m /d
 (9 mgd)  of secondary effluent  could  be discharged into the river with-
 out ammonia control.   These calculations were based  on the assumption
 that  the  background  ammonia level during  summer  conditions would be
 0.1 mg/£.   Thus,  again,  costly ammonia control was found to be un-
necessary  and was  not  included in the plant design.
      In  July  1978, EFA issued  an Amendment  to the Negative Declaration
on  the Grand Junction  project  to address the changes presented in the
predesign  report.  The  plan to phase out  the existing plant and to
                         3
construct  a new 47,000  m /d (12.5 mgd) activated sludge plant at
Fersigo Wash was  found  not  to  have significant environmental impact.
However,  the  issue of  ammonia  control was included in the Negative
Declaration as  a  condition to  the grant such that "results of the
water quality study  and other  significant factors will determine if
ammonia control will or will not be necessary on this project".  The
results of the  study reported  here are intended  to answer this question.
                                   13

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 The Fruita Wastewater Treatment Facilities and Discharges
      Located 20 km (12.5 mi) downstream from Grand Junction,  the Town
 of Fruita has an existing population of 3,800 compared to Grand
 Junction's population of 58,000.  Although expected to increase nearly
 three-fold by 1983, the population of Fruita, existing and projected,
 is significantly smaller than that of Grand Junction.   The town is
                               3
 currently served by a 15,000 m /d (0.4 mgd) aerated lagoon system
 which discharges into Little Salt Wash, an irrigation-return  channel
 tributary to the Colorado River.
      Because Fruita is located directly downstream from Grand Junction,
 the receiving water for Fruita's wastewater effluent is within the
 habitat for the endangered fishes where ammonia wasteloads are
 critical.   Thus, the discharge of ammonia is a predominant environ-
 mental issue which is discussed in the 201 Wastewater Treatment
 Facilities Plan for Town of Fruita (September 1977) and the "Negative
 Declaration" (July 14, 1978).
      Fruita's 201 plan examined six alternative wastewater management
 options and recommended expanding and upgrading the existing  lagoon
                  o
 system to  4,700 m /d (1.25 mgd) to meet secondary treatment standards.
 Ammonia control was not included, with the rationale that if  the
 Grand Junction treatment plant reduces its discharge of ammonia, then
 Fruita can meet water quality criteria with secondary treatment only.
 The Negative Declaration indicated that the environmental impact of
 the proposed project would not be significant.   However, similar to
 the Amendment to Negative Declaration for Grand Junction, the Fruita
 document includes a condition to grant which is dependent upon the same
 "water quality study and other significant factors" to determine the
 need for ammonia control.  Results of the present study are intended to
 satisfy this condition as well.

OTHER WATER QUALITY STUDIES NEAR GRAND  JUNCTION
The U.S. Environmental Protection Agency
     During 18 to 21 October 1976, the  Technical Investigations  Branch
of the U.S. Environmental Protection Agency, Region VIII,  conducted an
                                    14

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intensive water quality study of a segment of the Colorado  River near
the Grand Junction Sewage Treatment Plant (STP).   The purpose  of the
study was "to determine the existing in-situ concentrations of ammonia
in the Colorado River due to the discharge from the Grand Junction STP
during low-flow conditions."  Results of this study indicated  that tox-
ic concentrations of un-ionized ammonia exist in the Colorado  River down-
stream from the plant and that a 73 percent reduction in ammonia dis-
charge from the plant may be necessary.  However, the time  of  this study
occurred nearly three months after the low-flow period.   Because of this
delay, extensive additional study during actual low-flow conditions was
recommended to verify the conclusions of this study.  In addition, a
long-term monitoring program was deemed necessary to obtain a more com-
plete understanding of the ammonia toxicity problem.
Colorado Department of Health - Water Quality Control Division
     Water quality investigations were conducted on the Lower Colorado
River from October 1973 through September 1974.  Chemical,  bacteriolog-
ical and biological data were obtained at 23 sampling stations along
222 km (139 mi) of the river from Dotsero, Colorado to the Utah border.
     Four of the stations are within the study area between Grand Junc-
tion and Fruita.  All sampling at these stations occurred during  the win-
ter when water temperatures ranged between 0° and 1°C, and pH generally
                                                                  2
ranged between 8.0 and 8.4.  The flow ranged between 153 and 156 m /s
(5400 and 5500 cfs).  Four samples taken in December and January were
analyzed for ammonia, and no ammonia was detected.
     On 16 and 19 September 1974, water samples were taken at the Grand
Avenue Bridge and the Fruita Bridge.  Temperatures  ranged from 15°C to
18°C, and pH from 8.1 to 8.3.  Only one sample was  analyzed for ammonia,
and again, no ammonia was detected.
Salinity Studies
     In the immediate area of Grand Junction, extensive  research  is cur-
rently being conducted to study salt loading  to  the Colorado  River.  The
U.S. Bureau of Reclamation, EPA, University of California  at  Davis, Col-
orado State University, and local irrigation  and water  companies  are
engaged in several projects to examine salinity  sources  and control
                                    15

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measures near Grand Junction.  Although not directly related to this
study,  the additional field information is enlarging the local water
quality data base which may relate to upstream nonpoint sources of
ammonia.

AMMONIA TOXICITY
     Ammonia is an important nutrient present in all aquatic ecosystems
and may be used directly by plants or may be converted to nitrate before
uptake.  It is a normal biological product from the degradation of pro-
teins and is usually present in low concentrations.  High concentrations
of ammonia often occur in municipal wastewater effluent, industrial dis-
charges, and agricultural runoff which are discharged into surface wa-
ters.  High levels of ammonia in these waters can cause harmful effects
such as increased oxygen demand, algal bloom formation resulting in de-
pressed nighttime dissolved oxygen concentrations, corrosiveness to cop-
per pipes and a measurable toxic effect to many aquatic species.
     In 1973, the European Inland Fisheries Advisory Commission deter-
mined that fishes were the critical organisms for establishing instream
ammonia criteria.  Toxicity tests on freshwater fishes have shown that
tolerance to ammonia appears to differ for various species of fishes for
short periods of exposure to high concentrations.  For long-term expo-
sure, however, it is believed that sublethal concentrations of ammonia
affect different fishes similarly.  Studies have shown that the ultimate
response to a given concentration of un-ionized ammonia is the same for
trout and carp.  Thus, a single criterion appears adequate for all spe-
cies of freshwater fishes and other aquatic life (Ball 1967 as sited in
Willingham 1976, and European Inland Advisory Commission 1973).  Both
the National Water Quality Laboratory and the European Inland Fisheries
Advisory Commission have recommended that for freshwater aquatic life,
un-ionized ammonia should not exceed 0.02 rag/J, NH3-N (W. Willingham,
1976).
     In aqueous solution, ammonia exists in two forms—the ionized
(NH^) and the un-ionized (N^) species.  Studies have shown the un-
ionized species to be the predominant toxic agent to aquatic life.  Rel-
ative concentrations of the two forms are highly dependent on pH and
                                   16

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temperature.  The un-ionized fraction increases with rising pH and with
rising temperature.  Other parameters, such as free carbon dioxide, dis-
solved oxygen and bicarbonate alkalinity, which are all interactive with
pH, affect the toxic effect of ammonia, though to a lesser extent than
pH or temperature.  To a point, increasing salinity or ionic strength
tends to decrease ammonia toxicity, though this too is of lesser impor-
tance than pH or temperature.
     The U.S. Environmental Protection Agency has recommended a criter-
ion for un-ionized ammonia concentration of 0.02 mg/£ NH3~N as the "safe"
limit for freshwater aquatic life.  In this study, this limit is used
together with representative background conditions to calculate allowable
discharges of ammonia from the Grand Junction and Fruita treatment facil-
ities.  Two exceptions to this criterion should be noted.  In waters
with temperatures less than 5°C, there is additional physiological stress
on fishes which reduces their ability to resist toxic effects of ammonia
(European Inland Fisheries Advisory Commission, 1973).  In addition, at
high pH values and very low levels of free carbon dioxide, "the levels
of un-ionized ammonia found to be toxic may be about five times greater
than those applicable to polluted waters where the level of free carbon
dioxide is likely to be high and the pH value lower" (European Inland
Fisheries Advisory Commission, 1973).  In this report, pH values greater
than 8.5 are considered high.  Provision for these exceptions are  in-
cluded in the calculations and presented in the discussion of results.

OBJECTIVES
     The objective of this study is to gather specific water quality
data for an entire  water year so that discharge requirements for
the Grand Junction and Fruita wastewater treatment facilities can be
established which will achieve an instream  concentration of un-ioniz-
ed ammonia no greater than 0.02 mg/£ NH_-N.  The specific water quality
data measured are temperature, pH, total ammonia and flow.  These  data
are used together with historical data to determine background con-
centrations of un-ionized ammonia statistically representative of  the
study area for each season of the year.  From this determination of
instream  conditions, the mass loading of total ammonia from the two
                                    17

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 treatment facilities  is  calculated such that  the  concentration of un-
 ionized ammonia in the river will not  exceed  0.02 mg/Jl NH-j-N.

 APPROACH
      The monitoring program is  designed to  encompass one precipitation
 cycle,  or water year,  beginning in September  1978 and continuing through
 the  end of September  1979.   This  provides a continuous record of water
 quality data which can be compared to  historical  data to determine how
 representative  the 1978-79  season is of average conditions.  The moni-
 toring  program  consists  of  four components:   (1)  dye tracer study, (2)
 intensive surveys,  (3) water quality sampling, and  (4) flow determina-
 tion.   The first two  components are discussed in  detail in Appendices D
 and  E.   The last two  components,  which form the bulk of the study, are
 presented in Section  3.
 Dye  Tracer Study
      The initial task  of the project is to  inject a bio-degradable fluo-
 rescent  dye into Persigo and Little Salt washes to determine mixing pat-
 terns in the Colorado  River  during summer low-flow conditions.  The lo-
 cations  of  the  dye  injections are approximately the proposed sites for
 future wastewater  discharge  from  Grand Junction and the current site for
wastewater  discharge from Fruita.   The dissolved  dye can be reasonably
assumed  to  simulate the behavior  of ammonia present in wastewater efflu-
ent, and  the result in mixing characteristics can be used to predict the
dilution pattern of ammonia  in  the  river.  The results of this study are
used to select  the exact locations  of  the sampling sites for the 13-month
monitoring program.
Intensive Surveys
     Diurnal variations of the  concentration of un-ionized ammonia in
the river are established by frequent water sampling throughout the
course of one day at critical locations.  These repeated samplings, or
intensive surveys, are performed  twice  during the monitoring program—
once each during the summer  and winter  low-flow periods—to look for
correlations as well as to determine seasonal differences in the diurnal
patterns.  Results from the  intensive surveys are used to adjust all
                                  18

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un-ionized ammonia determinations made during the 13-month study period

to one reference time.  This time adjustment helps validate comparisons

between sampling events, regardless of what time of day the sampling

occurred.

Water Quality Sampling

     Water quality sampling is conducted weekly for 13 months to measure

pH, temperature and total ammonia concentration at ten stations along

the Colorado River and its tributary washes.  At the river stations, sev-

eral samples are obtained along a transect, resulting in a total of 35

sampling sites.  Locations of the ten stations are shown in Figure 1,

and the transect points for Stations 3, 5, 7 and 10 are shown in Figures

2 and 3.  The sampling stations and the reasons for their locations are

described as follows:

     Station 1    Colorado River on the West Side of the Grand
                  Avenue Bridge in Grand Junction, 0.4 km (0.2 mi)
                  Upstream from the Existing Sewage Treatment
                  Plant—Six sampling points were employed across
                  a transect beneath arches in the bridge.  This
                  station serves as the control for background
                  conditions without any influence of the treat-
                  ment plant.

     Station 2    Effluent from the Grand Junction Treatment
                  Plant during Hours of Peak Flow (10:00 am and
                  2:00 pm)—This sample provides an accurate
                  measure of effluent quality at the time of
                  sampling.

     Station 3    Colorado River Just Upstream of Persigo Nash,
                  9.5  km (5.9 mi)  Downstream from Grand Junction
                  Treatment Plant—Three sampling points are
                  located across a transect at 1/4, 1/2 and  3/4
                  points across the river.   Effects from the
                  treatment plant should be fully mixed at this
                  distance downstream,  and samples show back-
                  ground river conditions without effects of
                  Persigo Wash.

     Station 4    Persigro Wash 15 to 30 Metres (45 to 90 ft)
                  from Confluence with  Colorado River,  Proposed
                  Receiving Water Course for Future Regional
                  Treatment Plant—One  sample taken at  the cen-
                  ter  of the stream represents the quality of
                  agricultural runoff as well as background
                  quality of receiving  water.
                                  19

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                                                      FIGURE  2
       DETAIL OF
  SAMPLING STATIONS
        3,4 AND 5
                                                            Pochard
                                                             ==a
                                                             Wash
  4) Sampling Station
    Sampling Points
A B c on Transect
                                        ENGINEERING-SCIENCE, INC

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       DETAIL OF
  SAMPLING STATIONS
      6,7,8,9 AND 10
  6)Sampling Station
I  i i Sampling Points
A B c on Transect
          SCALE
          1:6000
                                                              CO

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 Station 5    Colorado River Downstream from Persigo Wash
              and Pritchard Wash, at Upstream End of Mid-
              River Island—Six sampling points are locat-
              ed across a transect in north channel at 3-m
              (10-ft) intervals from the north bank; a
              seventh sample is taken from north side of
              south channel.  The transect samples show
              effects of wash water across the river
              width as well as difference in water qual-
              ity between the two channels.

 Station 6    Effluent from the Fruita Lagoon System—This
              sample will provide a measure of quality at
              the time of sampling.

 Station 7    Colorado River Just Upstream of Little Salt
              Wash (Receiving Water Course for Fruita
              Lagoon System)—Four sampling points  are
              located across a transect  at 1/4,  1/2 and
              3/4 points  on  the east  channel,  and a fifth
              point  is located in the center of  the west
              channel.  Samples show  background  river con-
              ditions without  the effects  of Little Salt
              Wash and Fruita  discharges.

 Station 8     Little  Salt Wash, About  50 Metres  (150 ft)
              Upstream from  the Discharge  from Fruita
              Lagoon  System—One  sample taken at center
              of  stream represents the background qual-
              ity of  receiving water.

Station 9     Colorado River, 0.8 km  (0.5 mi) Downstream
              of Little Salt Wash and Just Upstream  from
              Big Salt Wash—Six smpling points are
              located across a transect, four at 3-m
              (10-ft) intervals from the north bank, one
              at mid-river and one at 3/4 of the river
             width from the north bank.  The transect
              samples show effects of Fruita discharge
             and Little Salt Wash across the river width.

Station 10   Colorado River, 0.2 km (0.12 mi) Downstream
             from Big Salt Wash—Five samplings points
             are located across a transect, three at 3-m
              (10 ft) intervals from north bank,  one at
             mid-river and one at 3/4 of the river  width
             from the north  bank.  This station, located
             the farthest downstream of all stations, is
             where mixing from Big Salt Wash is  occurring,
             and effluent from the treatment plants is
             fully mixed  with the river water.
                              22

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     During the regular monitoring program, sampling is conducted on
Monday afternoon of each week, whenever possible.  During the two in-
tensive surveys, the regular weekly sampling at Stations 3, 4, 5, 7, 8
and 9 is suspended to avoid duplication.  For two months during the sum-
mer, August and September, sampling frequency increases to twice per
week to provide more data during the critical low-flow period.
Flow Determination
     Streamflow is determined by measuring stream velocity and cross-
section area at two river sites and two tributary sites monthly.  The
sites include the Broadway Bridge (also referred to as Grand Avenue
Bridge) across the Colorado River at Grand Junction, Station 1, and the
State Highway 340 Bridge across the Colorado River near Fruita, 1.7 km
(1 mi) upstream of Station 7.  Persigo Wash, Station 4, is gauged at a
site downstream of Interstate 70, and Little Salt Wash, Station 8, is
gauged at a site under the Highway 6 Bridge.  In addition, flows from
the two treatment facilities, Stations 2 and 6, are measured using exist-
ing gauges.
                                   23

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           SECTION 3

      MONITORING PROGRAM:
METHODS, RESULTS AND DISCUSSION

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                               SECTION 3
                          MONITORING PROGRAM:
                    METHODS, RESULTS AND DISCUSSION
METHODS OF WATER SAMPLE COLLECTION AND ANALYSIS
Sample Collection
      Water samples were collected by submerging and filling plastic
sample bottles, about 30 cm (1 ft) below the surface of the water.
Clean sample bottles were rinsed several times with river water before
filling to minimize contamination.  Care was taken to avoid collecting
any debris floating in the water.
      At most sampling sites, the river was shallow enough to allow
sample collection by wading.  For these stations, the sampling point
could be accurately relocated by pacing between points.  Sites sampled
by wading included Stations 1A through IF, 2, 4, 5A through 5G, 6, 7D,
8, and 10A through IOC.  All other sampling sites required access by
boat.  These were Stations 3A through 3C, 7A through 7C, 9A through 9F
and 10D through 10E.  For these sites, the length of the boat was used
to measure distance between sampling points.  Samples were collected
from the forward part of the boat to prevent contamination from the
motor.  The type of boat employed was a 10-ft fiberglas, twin-hull
fishing boat powered by a 10 HP outboard motor.
                                    27

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Sample Analysis
      Temperature
      Thermometers, calibrated biannually with a National Bureau of
Standards Certified Thermometer, were placed in plastic protective
casings to avoid breakage.  Temperature readings were made immediately
following collection of individual samples, either while wading or
from the boat.  After allowing time for the thermometers to equilibrate,
readings were made to the nearest 0.1°C.
      Each week, immediately following collection of all samples, pH
values were measured using a Weston and Stack portable pH meter.  The
meter was calibrated with standard buffer solutions of pH 7.00 and
10.00 which were thermally equilibrated with the samples.  Calibration
with the buffer solution was repeated several times during each set of
measurements to check for any drift in the meter.  Readings were taken
to the nearest 0.1 pH unit.
      Ammonia-Nitrogen
      For all river and wash samples, concentration of ammonia was de-
termined using the direct nesslerization method; effluent samples were
analyzed using distillation followed by nesslerization to ensure accu-
rate measurements at higher ammonia concentrations.
      After the pH determination, samples were acidified with sulfuric
acid and, when possible, refrigerated until analyzed for ammonia.  It
was originally planned to analyze the samples in the field using a
Bausch and Lomb m-spec 20 spectrophotometer.  However, the quality of
distilled water available in the field was highly variable and produced
inconsistencies in recovery rates and spiked and duplicate samples.
Consequently, most of the samples were analyzed in the Engineering-
Science Research and Development Laboratory.
      Ammonia analyses were conducted according to procedures in
Standard Method 418B.  To ensure the reliability of the results, three
recovery analyses were performed with each set of samples.   The recover
ies were done over a wide range of concentrations — 12.2, 36.6, 61.0 yg
                                  28

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so that the most accurate value of precision may be determined.  Occa-
sionally a sample was analyzed in duplicate, again to demonstrate the
precision of the analysis.  When the sample volume of 50 mJl exceeded
the range of the standards, the sample was diluted to 2 m£ in 50 m£. Re-
covery rates generally ranged between 95 and 105 percent.
     Due to the nature of the water samples, a high turbidity was often
encountered.  To remove extraneous particles, ZnS(>4 was used as a floc-
culating agent.  As the samples were preserved with dilute acid, 4 m£ of
6N NaOH had to be added before the precipitation process would occur.
The samples were then filtered, and 50 mil of filtrate retained for anal-
ysis.  Depending on the turbidity of the water, numerous filtrations
were often required.
     The greatest source of error was undetected colloidal particles
which would increase the apparent NH3 value when measurements were made
on the spectrophotometer.  To avoid this, the sample concentrations for
about 10 percent of the samples were determined using nessler tubes in-
stead of the spectrophotometer.

RESULTS OF WATER QUALITY SAMPLING
     Water quality sampling began on 8 September 1978 and continued there-
after on a weekly basis until 29 September 1979.  Collected data are pre-
sented chronologically in Appendix A.  Time of sampling, measured temper-
ature, pH and concentration of total ammonia are given together with cal-
culated concentrations of un-ionized ammonia and time-adjusted un-ionized
ammonia.  Missing data are due to one of two reasons:  (1) sample was
lost or damaged in transit; or (2) sampling point was not accessible be-
cause of legal problems, mud, ice, or boat failure.
     Un-ionized ammonia concentrations in the river exceeding the recom-
mended EPA criterion of 0.02 mg/£, NH-j-N are denoted with asterisks—one
asterisk for samples with pH greater than 8.5 (to indicate situations of
less potential toxicity) and two asterisks for samples with pH less than
8.5.  This distinction is noted because at pH greater than 8.5, if  there
is little free carbon dioxide in the water, the tolerance of fishes to
un-ionized ammmonia appears to increase (Eur. Inland Fisheries Adv. Comm.,
1973).
                                   29

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      Calculations of un-ionized ammonia concentration are based on the
 relationship described in Ammonia Toxicity by Willingham.  In solution,
 un-ionized ammonia exists in equilibrium with ionized ammonia and the
 hydroxide ion as follows:
      NH3(g)  + nH20(£)  ^ NH3-nH20(aq) ^ NH4+ + OH~ + (n-l)H20(Jl)
 The relative concentrations of the two forms of ammonia are determined
 by the following relationship:
         K _ „   	(Cone,  un-ionized ammonia)	
          a   ^*  (Cone,  ionized ammonia)(Cone,  hydroxide ion)
 where Ka and ^ are constants dependent  on temperature.  The concentra-
 tion of un-ionized ammonia is then computed from the following formula:
          (Cone, un-ionized ammonia)  = (Cone, total ammonia)
                                       1 + antilog (pKa-pH)
 Thus,  only temperature,  pH and total ammonia figure  in the  calculations
 of un-ionized ammonia  concentration.   Other factors, such as ionic
 strength and paired ion  species  are  considered  minor and assumed  negli-
 gible  in the calculation.   The activity coefficient  is assumed to be
 1.0  in all calculations.   One exception to the  use of this  formula is  at
 temperatures less  than 5.0°C,  un-ionized  ammonia is  calculated at 5.0°C
 rather than  at  the actual  temperature.  This is because of  the additional
 stress to  fishes  induced by lower  temperatures  (European Inland Fisheries
 Advisory Commission, 1973).
     Time  adjusted un-ionized ammonia concentration  is determined on the
 basis  of the diurnal trend  in temperature  observed during the  winter in-
 tensive  survey  as  well as during the  weekly  sampling.   Measured tempera-
 tures were adjusted to the worst-case time of day, usually  about  3  p.m.;
 measure  pH and  total ammonia, which showed no specific trends,  were un-
 changed.  Concentrations of un-ionized ammonia  were  then calculated us-
 ing the  adjusted temperature, measured total ammonia and measured pH.
All calculations were performed on the Engineering-Science  digital
 computer.
                                   30

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DISCUSSION  OF WATER QUALITY RESULTS
Spatial Correlation of Un-Ionized Ammonia
     River  Width
     Relative data for all transect points of the river stations were
examined for predominating effects caused by proximity to the banks,
such as depth of water, sediments or runoff.  In nearly all cases, pH
and temperature remained consistent for all transects.  As expected,
the temperature at sampling points closer to the banks, where the river
is more shallow, is warmer in the summer and cooler in the winter than
at points closer to mid-river.  Values of pH across a transect are
usually constant and vary, if at all, by only a few tenths of a pH unit.
     Concentrations of total and un-ionized ammonia, on the other hand,
show no apparent correlation with distance from the river banks.  For
any transect, the location of the highest ammonia concentration varies
erratically from week to week, sometimes occuring next to the bank and
at other times occuring in mid-stream.  This random distribution of
ammonia indicates the absence of any point sources within the study area
or immediately upstream.  Apparently, neither Persigo Wash nor Little
Salt Wash exert an influence on the ammonia concentration of downstream
sampling points.  Similarly, mid-river islands exert little direct ef-
fect on ammonia levels.
     Because of this lack of correlation, all sampling points on one
transect for one sampling event were treated as replicates.  Thus, the
range of un-ionized ammonia concentrations was plotted for each station,
and the median concentration* was used to represent most accurately the
data for that transect.
     River Distance
     Un-ionized ammonia concentrations are correlated with river distance
by using Station 1 (Grand Avenue Bridge) as a reference point.  Concen-
trations of un-ionized ammonia at downstream stations are then plotted
as a function of river distance from Station 1 for each month of the
*Median, rather than mean concentration, is used because the data from
any given sampling event are not necessarily normally distributed.
                                   31

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study.  These relationships, depicted in Figures 4 through 16, are de-
termined for the six river stations by the range and median values of
un-ionized ammonia concentrations of all sampling events in each month.
     In general, un-ionized ammonia concentrations remained fairly con-
stant along the 20-km reach of the river throughout the course of the
study.  With the exceptions of September and October 1978, un-ionized am-
monia concentration varied by less than 0.003 mg/JL among the stations.
During the spring months of April, May and June 1979, NH3~N was most
notably constant along the river.  During September and October of 1978,
not only a decreasing trend in un-ionized ammonia concentrations was
observed from upstream to downstream stations but also the highest median
values of NH-j-N in the entire study period occured.  During September
1978, median values of un-ionized ammonia concentration exceeded  the
0.02 mg/fc criterion at Stations  1, 3 and 7 and indicated a significant
diluting effect by the washes immediately downstream.
     Effects of increased ammonia concentrations from the wastewater
discharges at Grand Junction and Fruita are not apparent in the river
profiles of un-ionized ammonia levels.  The only dramatic increases,
observed only a few times during the study period, appear to be due to
inflow from Persigo and Big Salt washes.
Temporal Correlations of Un-ionized Ammonia
     Weekly fluctuations in un-ionized ammonia concentration were plotted
for the study period using the range and median values at transect points
for the river stations and the single values for the washes and wastewater
discharges.  Figures 17 through  26 show these fluctuations for the ten
sampling stations.  Tremendous variation from week to week is evident
in the river and wash samples, with frequent ten-fold and occasional
fifty-fold changes occuring from one sampling event to another.
     A seasonal trend is evident for the six river stations, despite the
weekly fluctuations.  In general, the high levels of un-ionized ammonia,
approaching 0.01 mg/fc, appear to occur during late August and early
September, and the low levels, about 0.001 mg/£, in June and early July.
Not surprisingly, these trends corresponded respectively with the lowest
and highest flows in the river.  Following this generalized trend, a
secondary "peak" in un-ionized ammonia concentrations, about 0.05 mg/il,
                                   32

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UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS

   ALONG THE COLORADO RIVER DURING SEPTEMBER 1978
    1.0
 . 0.1
 I
 u
 o

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                                                     25

-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
   ALONG THE COLORADO RIVER DURING OCTOBER 1978
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                                                                25
                                                                              01

-------
UN-IONIZED AMMONIA RANGE
AND MEDIAN CONCENTRATIONS
ALONG THE COLORADO RIVER DURING NOVEMBER 1978
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-------
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-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
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-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
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                               10          15          20

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25

-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
    ALONG THE COLORADO RIVER DURING MARCH 1979
    1.0
  £
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-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
   ALONG THE COLORADO RIVER DURING  APRIL 1979
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                                                                  25

-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
    ALONG THE COLORADO RIVER DURING MAY 1979
    1.0
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-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
   ALONG THE COLORADO RIVER DURING JUNE 1979
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                                                        25
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m

-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS
   ALONG THE COLORADO RIVER DURING JULY 1979
   1-0  r-
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5          10         15          20
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                                                               25

-------
UN-IONIZED AMMONIA RANGE AND  MEDIAN CONCENTRATIONS
    ALONG THE COLORADO RIVER DURING  AUGUST 1979
    1.0  ,-
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-------
UN-IONIZED AMMONIA RANGE AND MEDIAN CONCENTRATIONS

    ALONG THE COLORADO RIVER DURING SEPTEMBER 1979
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                                                                             25

-------
              UN-IONIZED AMMONIA CONCENTRATION WEEKLY RANGE AND MEDIAN
                       FROM SEPTEMBER 1978 THROUGH SEPTEMBER 1979
                               AT STATION 1, COLORADO RIVER
      10
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           SEP   OCT   NOV

                    1978
                          DEC
JAN    FEB    MAR   APR    MAY

                    1979
JUN
JUL
                                                                          AUG
SEP

-------
                            UN-IONIZED AMMONIA CONCENTRATION
                       FROM SEPTEMBER 1978 THROUGH SEPTEMBER 1979
                      AT STATION 2, GRAND JUNCTION SEWAGE EFFLUENT
      1.0 • •
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m
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                    1978
JAN    FEB    MAR   APR   MAY

                     1979
JUN
                                           JUL
AUG
                                                 SEP
                                                        oo

-------
               UN-IONIZED AMMONIA CONCENTRATION WEEKLY RANGE AND MEDIAN
                         ROM SEPTEMBER 1978 THROUGH SEPTEMBER 1979
                                AT STATION 3, COLORADO RIVER
 00
   Q

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                                            EPA CRITERION
sk MISSING DATA POINTS
                                    JAN    FEB    MAR   APR   MAY    JUN    JUL   AUG
           SEP
              OCT   NOV
                 1978
                        SEP

-------
                            UN-IONIZED AMMONIA CONCENTRATION
                       FROM SEPTEMBER 1976 THROUGH SEPTEMBER 1979
                                 AT STATION 4, PERSIGO WASH
      10 1 •-
      10 * ••
      103 ..
rn
33
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SEP    OCT   NOV

         1978
                              DEC
                                 JAN    FEB    MAR   APR    MAY

                                                     1979
JUN
JUL
AUG
SEP

-------
               UN-IONIZED AMMONIA CONCENTRATION WEEKLY RANGE AND MEDIAN

                       FROM SEPTEMBER 1978 THROUGH SEPTEMBER 1979
                                AT STATION 5, COLORADO RIVER
      10-
   I
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           SEP   OCT   NOV

                    1978
                          DEC
JAN    FEB    MAR   APR   MAY

                     1979
                                                               JUN
JUL
AUG
SEP

-------
                              UN-IONIZED AMMONIA CONCENTRATION
                         FROM SEPTEMBER 1978 THROUGH SEPTEMBER 1979
                             AT STATION 6, FRUITA SEWAGE EFFLUENT
        1.0
O
m
z
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SEP
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                                        FEB
                  1978
                                                                jj< MISSING DATA POINTS
                                                  MAR   APR   MAY    JUN    JUL    AUG   SEP

                                                           1979

-------
              UN-IONIZED AMMONIA CONCENTRATION WEEKLY RANGE AND MEDIAN
                       FROM SEPTEMBER 1978 THROUGH SEPTEMBER 1979
                               AT STATION 7, COLORADO RIVER
-
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                                                     1979
JUN
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                         CO

-------
       10
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                              UN-IONIZED AMMONIA CONCENTRATION
                         FROM SEPTEMBER  1978 THROUGH SEPTEMBER 1979
                                 AT STATION 8, LITTLE SALT WASH
                                                             MISSING DATA POINTS
            SEP    OCT   NOV
                     1978
                           DEC
JAN   FEB    MAR    APR    MAY

                     1979
JUN
JUL
AUG
SEP
                                                                                            O
                           ro

-------
              UN-IONIZED AMMONIA CONCENTRATION WEEKLY RANGE AND MEDIAN
                       FROM SEPTEMBER 1976 THROUGH SEPTEMBER 1979
                               AT STATION 9, COLORADO RIVER
      10-1 - -
      10-2..
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                                                     1979
JUN
JUL
AUG
SEP
                         O
ro
01

-------
               UN-IONIZED AMMONIA CONCENTRATION WEEKLY RANGE AND MEDIAN
                       FROM SEPTEMBER 1978 THROUGH SEPTEMBER 1979
                               AT STATION 10, COLORADO RIVER
      10
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   I  10-2
 Ln
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                                                    1979
JUN
JUL
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-------
 appeared to occur in January  and February.   This,  too,  seems  to  corre-
 spond with a secondary low flow period.   These  seasonal trends are high-
 ly generalized,  and  as observed in the measured range,  can be easily ob-
 scured by the short-term fluctuations.
      Ammonia concentrations at  Persigo and Little Salt washes did not
 show a seasonal  pattern.   Un-ionized  ammonia concentrations generally
 ranged between 0.001 and 0.01 mg/£ throughout the  study period for both
 washes.   Median  concentrations  for the two washes were  nearly identical
 with 0.0035 mg/£ for Persigo  Wash and 0.0030 mg/£  for Little Salt Wash.
      At  the two  wastewater discharges, the un-ionized ammonia concentra-
 tions reflected  a  difference  in treatment method.  The  Grand Junction
 effluent  ranged  between 0.008 and  1.2 mg/Jl un-ionized ammonia during the
 study period;  for  the  discharge from  Fruita,  the un-ionized ammonia con-
 centration  ranged  from 0.001  to 2.3 mg/&.  The median values for the two
 discharges  were  0.049  mg/Jl and  0.110 mg/Jl, respectively.

 METHOD OF FLOW DETERMINATIONS
      Monthly streamflow measurements were made for the months of Septem-
 ber  1978  through July  1979, and weekly measurements were made 14 August
 1979  through 26 September 1979.   Severe ice  and slush conditions pre-
 vented gauging on  11 December 1978 and 15 January 1979.  Flow from the
 Grand  Junction Wastewater Treatment Plant was noted weekly from an out-
 flow meter  outside of  the plant.  Outfall discharges from the Fruita
 Sewage Lagoon was  determined by monthly stage data and by the rating
 curve  for the existing V-notch weir.
     Measurements  for  the Colorado River at  the Broadway Bridge  (also
 referred to as Grand Avenue Bridge) at Grand Junction were made on the
upstream side of the bridge.  Measurements for the Colorado River at the
State Highway 340 Bridge near Fruita were made on the downstream side on
 7 September and 10 October 1978.  Thereafter, measurements were made
 from  the upstream side because  of eddy problems at the downstream side
caused by bridge piers.
     Equipment being used to measure velocity includes a Price current
meter, a Price Pigmy meter, a top setting rod, a hand line, and a crane
                                   56

-------
and reel mounted on a two-wheel base.  Where conditions permitted,  vel-
ocity measurements were made by wading, using the top setting rod.   This
approach was utilized for the two washes, and the Colorado River near the
Broadway Bridge during low-flow periods.  Where depths and/or velocities
were too great, measurements were made by suspending the flow meter from
a cable from bridges.  This was necessary for measurements of the Colo-
rado River at the Broadway Bridge during higher flows and at the State
Highway 340 Bridge near Fruita.

RESULTS OF FLOW DETERMINATIONS
     Streamflow measurements at the two river stations, the two washes,
and the Fruita Lagoon Outfall are summarized in Tables 2a and 2b.  Table
3 summarized the effluent discharges of the Grand Junction Wastewater
Treatment Plant.  Variation of flows over the thirteen-month study per-
iod are graphically depicted in Figures 27 through 31.  As a comparison,
Tables B.la and B.lb in Appendix B show results of flow determinations
and presently available USGS flows for their gauges near the study area.

DISCUSSION OF FLOW DETERMINATIONS
     Figures 29 and 30 illustrate how Fersigo Wash and Little Salt Wash
flows vary throughout the year.  Measurements conducted 15 May  1979
indicate relatively high runoff rates.  Persigo Wash averages approxi-
mately 0.12 m-Vs (4.2 cfs) during the months of November through April,
and Little Salt Wash averages 0.22 m3/s  (7.8 cfs) for the same  period.
After the high runoff measurements of May, the normal irrigation season
flows for the two washes average 1.35 and 2.16 m3/s  (47.6 and 76.4 cfs),
respectively.  Throughout the study period, the Grand Junction  discharge,
measured during hours of peak flow, averaged a relatively constant 0.282
m3/s (9.90 cfs or 6.4 mgd), and the Fruita Lagoon outfall averaged a  rel-
atively constant 0.015 m3/s (0.54 cfs).
     In late September 1978, staff gauges were installed at each of
the flow measurement sites.  The stage and discharge information were
combined to form the rating curves for each site, shown on Figures B.I
through B.8, which are included in Appendix B.  During the course  of  the
                                   57

-------
                                 TABLE 2a

                                GAUGED FLOWS
                                  (m3/s)
Date
9/07/78
10/10/78
11/13/78
12/11/78
1/15/79
1/22/79
2/15/79
2/16/79
3/12/79
4/09/79
5/15/79
6/12/79
7/17/79
8/14/79
8/22/79
8/29/79
9/05/79
9/12/79
9/19/79
9/26/79
Colorado River1
Broadway Highway 340
Bridge near Fruita
30
25
100
-
-
904
125
-
120
135
235
505
240
55
95
60
40
50
50
50
40
50
HO4
115
-
110
150
-
140
160
275
510
270
85
120
90
75
80
75
75
o
Persigo*
Wash
1.30
1.61
0.17
-
-
0.11
-
0.09
0.11
0.10
3.06
1.78
1.08
1.37
1.03
1.02
0.99
1.24
1.30
2.07
Little Salt2
Wash
2.24
2.75
0.17
-
0.09
-
0.17
-
0.36
0.30
3.29
2.10
1.19
2.11
2.42
1.97
2.00
2.27
2.29
2.41
Fruita3
Lagoon
Outfall
.014
.031
.011
-
.011
-
.010
-
.010
.011
.018
.025
.011
.014
.016
.015
.014
.015
.014
.017
1 Flows to nearest 5 nr/s
2Flows to nearest 0.01 m /s
^Calculated from staff gauge to nearest 0.001 WL/B
^Estimated
                                   58

-------
                                TABLE  2b

                                GAUGED  FLOWS
                                   (cfs)
Date
9/07/78
10/10/78
11/13/78
12/11/78
1/15/79
1/22/79
2/15/79
2/16/79
3/12/79
4/09/79
5/15/79
6/12/79
7/17/79
8/14/79
8/22/79
8/29/79
9/05/79
9/12/79
9/19/79
9/26/79
Colorado River
Broadway Highway 340
Bridge near Fruita
1000
900
3500
-
-
32004
4500
-
4300
4700
8300
17800
8400
2000
3300
2100
1400
1700
1800
1800
1500
1700
40004
-
-
3900
5400
-
4900
5700
9800
18000
9500
3000
4300
3200
2600
2700
2700
2600
Persigo2
Wash
46
57
6
-
-
4
-
3
4
4
108
63
38
48
37
36
35
44
46
73
Little Salt2
Wash
79
97
6
—
3
-
6
-
13
11
116
74
42
75
86
70
71
80
81
85
Fruita-*
Lagoon
Outfall
0.5
1.1
0.4
—
0.4
-
0.3
-
0.4
0.4
0.6
0.9
0.4
0.5
0.6
0.5
0.5
0.5
0.5
0.6
 Flows to nearest 100 cfs
 Flows to nearest 1 cfs
^Calculated from staff gauge to nearest .1 cfs
^Estimated
                                   59

-------
                     TABLE 3

             DISCHARGE  FLOWS(a>  AT
        GRAND JUNCTION  TREATMENT PLANT
Week
1
2
3
4
5
6
7
8
9
10
11
12
13
14
IS
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48A
48B
49A
49B
50A
SOB
51A
SIB
52A
52B
S3A
53B
54A
54B
S5A
55B

Date
09/08/78
09/19/78
09/26/78
10/03/78
10/12/78
10/20/78
10/26/78
10/31/78
11/09/78
11/13/78
11/20/78
11/29/78
12/03/78
12/12/78
12/18/78
12/27/78
01/01/79
01/08/79
01/17/79
01/22/79
01/27/79
02/05/79
02/15/79
02/24/79
03/01/79
03/08/79
03/12/79
03/19/79
03/26/79
04/02/79
04/09/79
04/19/79
04/23/79
04/30/79
05/08/79
05/13/79
05/21/79
06/01/79
06/08/79
06/13/79
06/20/79
06/30/79
07/05/79
07/13/79
07/21/79
07/27/79
08/04/79
08/07/79
08/11/79
08/14/79
08/18/79
08/21/79
08/25/79
08/28/79
09/02/79
09/05/79
09/08/79
09/11/79
09/15/79
09/18/79
09/22/79
09/25/79
09/29/79
Average
Flov (ngd)
5.8
4.8
6.0
5.5
5.8
6.75
7.3
6.8
5.8
5.8
5.8
6.5
5.9
5.8
6.2
5.8
7.7
6.4
7.5
5.5
6.5
5.3
5.5
14.5
5.5
6.4
5.3
5.3
6.3
5.5
5.3
5.1
5.0
6.5
6.3
4.5



5.8
8.0
6.8
6.8
6.3
6.8
7.5
6.8
6.8
6.6
7.0
5.0
6.6
6.0
7.6
S.S
7.5
7.5
7.0
7.5
6.5
7.7
6.3
7.5
6.4
Flow (i»3/d)
22,000
18,000
23,000
21,000
22,000
25,000
28,000
26,000
22,000
22,000
22,000
25,000
22,000
22.000
23-.000
22,000
29,000
24,000
28,000
21,000
25,000
20.000
21,000
55,000
21,000
24,000
20,000
20,000
24.000
21,000
20,000
19,000
19,000
25,000
24.000 '
17,000



22,000
30,000
26,000
26,000
24,000
26,000
28.000
26.000
26,000
25,000
26,000
19,000
25,000
23.000
29,000
21,000
28.000
28,000
26,000
28.000
25.000
29.000
24.000
28.000
24,000
(a)
  Flows Meeured between 10:00 a.m. end 2:00 p.m.
                         60

-------
                       FIGURE   27
GAUGED FLOWS FOR COLORADO RIVER
AT BROADWAY BRIDGE
18000 -

16000-
14000 —

12000-
^
£j 10000 -
oc
I
o
V)
Q
8000-
-
6000-
_
4000-

2000-














I I
1 T
9/7 10/10 11













B
i i
13 12/11 1/15














2/














15 3/














12 4/
1/22 2/16



















9 5/








15 6/













12 71








7 8/14













I
8/29 9














/19

— 500
-450
-400
— 350

I 1
K S
0 0
DISCHARGE (m 3/s)
— 200

— 150

— 100
-50


8/22 9/12 9/26

9/5

61       ENGINEERING-SCIENCE,  INC.

-------
                       FIGURE  28
GAUGED FLOWS FOR COLORADO RIVER
AT HWY.
18000 —
_
16000 —
14000 —

12000-
£
Q
SCHARGE
o
o
§
1 1
5
8000-
-
6000-
—
4000 —

2000-

















I I
9/7 10/10 11>
















lil
0
i r
'13 12/11 1/15

















2/
340

















15 3/
NEAR FRUITA

















12 4/
1/22 2/16






















9 5/








15 6/
















12 7/'








7 8/14

















8/29 9

















/19

— 500
— 450
-400
-350

UT
-300 "
UJ
0
oc
— 250 Q
(A
5
-200

-150

- 100
- 50

8/22 9/12 9/26

9/5

62
        ENGINEERING-SCIENCE, INC.

-------
                      FIGURE   29
GAUGED FLOWS FOR PERSIGO WASH
AT INTERSTATE 70
130 -
120 -

110 -

100 -
90 -
"3T
5. 80 -
111
O
CC
I 70 -
o
V)
a

60 -
50 -
40 —

30 -

20 -

10 —






































Ui Iff f
I I"













































































- 4.5

- 4.0

— 3.5
3?
CO
— 3 0 ^-
ill
O
CC
I
o
- 2.5 CO
Q

- 2.0

- 1.5

- 1.0

- 0.5



9/7 10/10 11/13 12/11 1/15 2/15 3/12 4/9 5/15 6/12 7/17 8/14 8/29 9/19
1/22 2/16

8/22 9/12 9/26
9/5
63
        ENGINEERING-SCIENCE, INC.

-------
                       FIGURE  30
GAUGED FLOWS FOR LITTLE SALT WASH
130 -
120 -

110 -

100 -
90 -
n
DISCHARGE (cl
2 §
1 1
60 -
50 -
40 —
30 -

20 -

10 -

!
AT U.S. HWY. 6


















»/7 10/







Ui III I
"I IT
10 11/13 12/11 1/15 2/15 3/12 4/9 5/














5 6/









2 71
M22 2/16




















17 8/14 I








)/29 9/1


— 4.5

- 4.0

- 3.5
M
-3.0 I
Ui
O
OC
X
o
- 2.5 CO
Q
- 2.0
- 1.5

- 1.0

- 0.5


9
8/22 9/12 9/26
9/5
64
        ENGINEERING-SCIENCE, INC.

-------
                       FIGURE   31
GAUGED FLOWS FOR FRUITA LAGOON OUTLET

1.1 —

1.0-
0.9 —

(0
DISCHARGE (cl
o o
^ 09
1 1
0.6 —
0.5 —
0.4 —

0.3 —
0.2 —

0.1 —

J

































I/7 10/10 11/
















tu
g
1
13 12/11 1/

















1
15 21

















15 3/

















12 4/

















9 5/









15 6,<













12 7/
1/22 2/16























17 8/14 8/









29 9/1 J
-.035

-.030


-.025
"
-------
study, some of the staff gauges were relocated due to problems with
backwater obscuring accurate stage levels.  After 15 May 1979, staff
gauge readings on the Colorado River were not possible because high
flows covered the gauges.  Sometime during the high flow period, these
gauges were lost.  Analysis of the rating curves indicates a  defined
relation between stage and discharge for each site.
                                   66

-------
                SECTION 4

        HISTORICAL PERSPECTIVE ON
REPRESENTATIVE CONDITIONS IN COLORADO RIVER
            NEAR GRAND JUNCTION

-------
                                SECTION 4
                       HISTORICAL PERSPECTIVE ON
               REPRESENTATIVE CONDITIONS IN COLORADO RIVER
                           NEAR GRAND JUNCTION
     Historical data examined for the calculation of representative con-
ditions include water quality data from the Colorado Department of Health
from 1968 to 1978 and U.S. Geological Survey from 1960 to the present.
Representative conditions were selected, in the perspective of historical
data, to describe a combination of conditions that would produce conser-
vative, but not necessarily worst-case, estimates of monthly un-ionized
ammonia concentrations.

WATER QUALITY
     Water quality data for three stations on the Colorado River in the
vicinity of the study area were retrieved from STORET, EPA's nationwide
computerized storage-retrieval system for a vast array of information on
the quality of various waterways.  The three stations are located near
Cameo, about 28 km (18 mi) upstream of Grand Junction; near Fruita; and
near Loma, about 8 km (5 mi) downstream of Fruita.  For all three stations,
approximately three to ten data points are available for each year from
1968 to 1978, with one exception.  At the station near Loma, 18 to 36 data
points are available from 1974 to 1977.  The range and median values of
temperature, pH and total ammonia for these stations for each month of the
year are reproduced in Table 4.  In Figures 32,33 and 34, monthly median
values for these three parameters for the station near Loma are used to
                                    69

-------
                                      TABLE 4

MONTHLY RANGES  AND MEDIANS OF COLORADO RIVER WATER QUALITY DATA^ ,  1968-78,
                     AT  THREE STATIONS NEAR  GRAND JUNCTION
Near Cameo (4-9 points)
Month
JANUARY
FEBRUARY
MARCH
APRIL
HAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
Temp.
•c
00.0-00.0
0
00.0-03.3
1.4
02.2-07.8
6.1
06.7-12.8
10.0
09.4-15.0
11.9
12.2-17.2
14.4
17.2-22.8
20.0
15.0-22.2
20.0
12.2-27.8
15.5
06.7-15.5
12.2
00.0-06.1
3.9
00.0-02.2
1.1
PH
7.6-8.2
8.2
7.7-8.8
8.15
7.2-8.6
8.1
7.5-8.6
8.1
8.1-9.0
8.4
8.0-8.6
8.4
7.7-9.0
8.6
7.6-8.8
8.4
7.9-8.7
8.4
7.6-8.6
8.1
7.6-8.9
8.3
8.1-8.6
8.3
Tot NH3
mg/t
0.04-1.00
0.8
0.50-1.40
1.0
0.00-0.82
0.6
0.00-0.08
0.06
0.00-0.1
0.08
0.00-0.29
0.17
0.04-0.1
0.04
0.16-0.25
0.20
0.00-0.28
0.02
0.00-0.25
0.05
0.00-0.7
0.05
0.30-0.30
0.3
Near Fruit a (5-8 points)
Temp.
"C
0.00-01.1
0
01.10-06.7
3.9
02.80-10.0
5.25
06.60-13.9
11.1
10.00-17.2
10.8
12.20-16.7
15.5
20.00-24.4
20.0
17.80-24.4
19.40
13.30-24.4
16.7
07.80-16.7
12.8
01.10-06.1
3.9
00.00-04.4
1.6
pH
7.4-8.6
8.15
7.9-8.7
8.1
7.7-8.7
8.2
7.3-8.7
8.2
8.0-8.6
8.4
7.8-8.7
8.2
8.1-8.5
8.2
7.6-8.7
8.2
8.0-8.4
8.2
7.4-8.6
8.35
7.6-8.8
8.3
7.8-8.8
8.4
Tot NH3
»g/t
0.00-0.6
0.18
0.60-1.2
0.9
0.00-0.5
0.2
0.00-0.34
0.04
0.00-0.16
0.0
0.00-1.1
0.19
0.00-0.35
0.08
0.00-0.16
0.0
0.00-0.8
0.1
0.00-0.25
0.16
0.21-0.25
0.23
0.00-0.45
0.28
Near Loraa
Temp.
°C
00.0-03.9
0
01.10-06.7
3.9
02.80-11.1
6.7
03.90-15.6
7.8
08.90-19.4
13.9
11.10-22.2
17.2
18.90-26.70
21.1
16.70-26.10
21.1
08.90-24.4
15.5
07.80-15.6
12.2
02.20-07.8
5.0
-00.60-04.4
2.2
(11-18 points)
PH
7.4-8.9
8.3
7.8-8.8
8.45
7.3-8.8
8.6
7.7-8.9
8.4
7.4-9.4
8.1
7.8-8.8
8.3
8.0-9.1
8.4
8.0-8.7
8.3
7.9-8.6
8.2
7.4-8.7
8.3
7.6-8.8
8.4
8.1-8.9
8.5
Tot NH3
mg/t
0.0-0.59
0.04
0.0-1.2
0.2
0.0-0.6
0.04
0.0-1.1
0.0
0.0-4.0
0.08
0.0-1.2
0.10
0.0-0.71
0.05
0.0-0.5
0.0
0.0-1.2
0.05
0.0-1.9
0.12
0.0-0.48
0.0
0.0-0.38
0.05
from EPA's computer storage system,  STORET, from Colorado Department of Health, Water Quality Division.

-------
                       WATER TEMPERATURES MONTHLY MEDIAN AND

                REPRESENTATIVE CONDITIONS ALONG THE COLORADO RIVER

                            NEAR GRAND JUNCTION AND FRUITA
a
—
z
m
m
Cfl
n
m
              NEAR GRAND JUNCTION 1978-79 •• •• •

              NEAR FRUITA  1978-79      iiiniiil

              HISTORICAL DATA  1968-78    •••••


              REPRESENTATIVE CONDITIONS
            JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP   OCT   NOV   DEC
                                                                                       o
                                                                                       c
                                                                                       73
CO
ro

-------
            pH MONTHLY MEDIAN AND REPRESENTATIVE CONDITIONS
                          ALONG THE COLORADO RIVER
                       NEAR GRAND JUNCTION AND FRUITA
8.6 -
                                                          LEGEND

                                                    NEAR GRAND JUNCTION 1978-79
                                                    NEAR FRUITA  1978-79

                                                    HISTORICAL DATA 1968-78

                                                    REPRESENTATIVE CONDITIONS
    JAN    FEB   MAR   APR    MAY    JUN    JUL    AUG   SEP    OCT   NOV   DEC
co
CO

-------
              TOTAL AMMONIA MONTHLY MEDIAN CONCENTRATIONS
                 AND REPRESENTATIVE CONDITIONS ALONG THE
              COLORADO RIVER NEAR GRAND JUNCTION AND FRUITA
  0.40
            1.0
01
E
oc
I-
ui
o
O
0
O

<
  0.30
    0.8

   Lo»t%
0.20
0.10
0.9
^
 0.6
py
-------
 represent the historical data because this  station has  the  most histori-
 cal data available.   On the same three figures,  corresponding monthly
 median values of the same parameters, determined from over  2,000  samples
 measured near Grand  Junction and Fruita during this study,  are also
 presented.
 Temperature
      A distinct  seasonal pattern is  observed  for the three  stations, as
 shown on Figure  32.   The pattern,  for historical data near  Loma,  is very
 closely followed by  data obtained  near Grand  Junction and Fruita.  A
 smooth, generalized  curve,  drawn through the  historical data and  the
 1978-79 data,  is used to represent typical  river temperature conditions
 for the projection of future conditions  and computations of un-ionized
 ammonia concentration.   At  times when river temperatures fall below 5°C,
 the representative temperature is  assumed to  be  5°C for the purposes of
 this  study.*
     The seasonal pattern of variation of pH in the river, shown on Fig-
ure  33 for 1978-79, was not similar to that of the historical record.
The  difference is both in the trends and values .  Previous years ' rec-
orded median pH values seem to be generally higher and more or less con-
sistent throughout the year, about 8.3.  (It should be noted that the
historical data include pH values which are unusually high, with several
values greater than 9.0 and as high as 9.4 in one instance.)  By contrast,
the  1978-79 pattern was distinctly seasonal.  During the warm months, pH
was  generally lower, reaching a minimum of 7.3.  The greatest difference
between historical and 1978-79 values was one pH unit in June and July.
However, because the historical data are represented by the median of
15 data points and the 1978-79 data are represented by the median of
60 to 75 points for these months, it was decided that the 1978-79 data
would more accurately represent river conditions.  A smooth curve was
drawn through the Grand Junction and Fruita data, which were in close
agreement.   This curve was then used in subsequent computations for
monthly pH values.
*The reason for this decision is presented in Section 3.

                                    74

-------
Total Ammonia
     Total ammonia (NH3 and NH4+) is the most important background water
quality parameter measured for the purposes of this study.  The monthly
medians for historical data are shown in Figure 34 for the three stations
for which data are available.  Fluctuations in ammonia concentration are
relatively great for historical data, in comparison with the 1978-79 con-
ditions, although no seasonal trend is apparent in either case.  Sporadi-
cally anomalous and high values (such as 0.6, 0.9 and 1.0 mg/i) are en-
countered in both the historical and 1978-79 data.  Otherwise, it appears
that the 1978-79 data were only slightly higher than the general trends
of the historical data.  It would then appear that the conservative ap-
proach would be to use the 1978-79 generalizing background pattern for
un-ionized ammonia computations.  Therefore, a straight line, at the 0.18
mg/Jl level is superimposed on Figure 34 to depict representative back-
ground conditions throughout the year.

FLOW
     Table 5 summarizes pertinent streamflow information which is pub-
lished by the U. S. Geological Survey (USGS).  Two gauges were once
located within the study area.  They are the Colorado River at Grand
Junction which was active from 1897 to 1899, and  the Colorado River
near Fruita which was active from 1908 to 1923.   Other historic infor-
mation is available for the Colorado River near Palisade, a short dis-
tance upstream, from 1902 to 1933.  Three gauges  in the vicinity of the
study area are presently maintained by the USGS.  The Colorado River
near Cameo gauge, located approximately 39 km  (24 miles) upstream from
Grand Junction has been in operation since 1931.  The Colorado River
gauge near the Colorado-Utah state line has been  in operation  since
1951 and is located approximately 29 km  (18 miles) downstream  of Fruita.
The gauge on the Gunnison River near Grand Junction was operated from
1894 to 1895, 1901 to 1906, and 1916 to the present.  Its location has
been changed a number of times.  The longest overlapping period for the
three gauges in their present locations is April  1960 to  the present.
                                    75

-------
                                TABLE 5

                         USGS GAUGING STATIONS
Name Number
Colorado River near Cameo1 09095500
Colorado River at Grand
Junction 09106500


Colorado River near Fruita 09153000
Colorado River near State line1 09163500
Gunnison River near Grand
Junction1* ^
(also at Whitewater) 09152500



Colorado River near Palisade 163
From
1931

1894
1896
1900
1907
1951

1894
1896
1901
1916
1901
To
Present

1895
1899
1900
1923
Present

1895
1899
1906
Present
1933
jUsed in Pearson Log III  analysis
"Gauge relocated several  times
                                  76

-------
Representative Conditions—Low Flow Projections
     Low flow projections can be made from statistical analysis of
streamflow data.  Generally, the longer the period of record,  the more
reliable the information obtained from statistical analyses.
     A Pearson Log III type analysis was performed on the three existing
streamflow gauges utilizing the period April 1960 through the  present.
Annual and monthly seven-day low flows were identified and ranked.  The
Pearson Log III technique generates estimated seven-day low flow values
corresponding to specific probabilities.  Included are the estimates for
the seven-day low flows to be expected once in ten years on the average.
This information is summarized on Tables 6a and 6b.
     The gauge for the Colorado River at Cameo and the gauge for the
Gunnison River near Grand Junction are indicators of the amount of
water supply available upstream of the study area.  The downstream
gauge on the Colorado River near the Utah state line is an indicator of
the amount of water which leaves the study area.  It is believed to in-
clude the effects of all irrigation and power return flow within the
tributary area above it.  In between the upstream and downstream gauges,
flows are affected by the amount of tributary area, and the amount of
surface diversions and/or return flow from irrigation and power genera-
tion.  Just downstream of the Colorado River gauge near Cameo, but up-
stream of the study area, are major diversions for the Grand Valley
Project, which includes the Government Highline Canal, the Orchard Mesa
Project  and some power generation.  Just downstream of this diversion
is another major diversion for irrigation, the Grand Valley Canal.
Downstream from the gauge on the Gunnison River is a major diversion
for the Redlands Power Canal and irrigation project.  The Redlands
diversion is shown on Figure 1.
     Return flows from the power portion of the Grand Valley Project
diversions occur upstream of the study area, while irrigation  return
flows occur upstream, within, and downstream of the study area.   Return
flow from the power portion of the Redlands diversion on the Gunnison
River occurs within the project area as does the  return  flow attribut-
able to irrigation.  Table 7 summarizes the average flows attributable
                                   77

-------
                                TABLE  6a
                          7-DAY LOW FLOWS  EXPECTED
                            ONCE  IN 10 YEARS1
                                  (m3/3)
Period
January
February
March
April
May
June
July
August
September
October
November
December
Annual
Colorado
at Cameo
33.1
33.2
33.3
44.5
59.4
97.4
52.4
47.7
46.7
44.5
41.1
35.9
31.4
River
Near State
Line
53.0
56.6
55.4
55.0
73.4
101.2
44.3
39.4
48.9
60.2
70.9
55.5
36.8
Gunnison River
Near Grand
Junction
16.1
16.6
16.5
20.1
31.5
22.9
12.7
13.1
16.2
18.1
21.6
17.4
12.1
^•Statistically derived from 1960-1978 period of record.
                                   78

-------
                                TABLE 6b

                         7-DAY LOW FLOWS EXPECTED
                           ONCE IN 10 YEARS1
                                  (cfs)
 Period
     Colorado River
               near State
at Cameo          Line
                  Gunnison River
                    near Grand
                     Junction
January
February
March
April
May
June
July
August
September
October
November
December
1168 (min)
1174
1176
1570
2097
3441
1849
1686
1650
1571
1452
1269
1873
1999
1956
1942
2592
3574
1564
1390 (min)
1727
2127
2503
1958
570
587
582
711
1111
807
450 (min)
462
573
639
763
613
Annual
  1109
1299
426
 Statistically derived from 1960-1978 period of record.
                                   79

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                                 TABLE 7
                           AVERAGE DIVERSIONS
                           GRAND JUNCTION AREA
Structure

1,000.000
nr
Average Diversions
Period,
af nr/s cfs Days
Grand Valley Canal          306       248,263    16.7    591       210
Grand Valley Project
     Power                  509       412,249    16.0    565       365
     Irrigation             549       444,935    30.0   1059       210
Redlands Canal
     Power                  580       470,103    18.2    644       365
     Irrigation              22        18,059     1.2     43       210
                                 80

-------
to the irrigation and power portion of the major diversions affecting
flows in this reach of the Colorado River.
     To account for the variation in flow to be expected due to differ-
ences in tributary area and location of return flow for irrigation and
power, adjustments in tributary area and return flow were made to the
monthly seven-day low flow estimates for the downstream gauge riear the
state line.  The monthly seven-day low flow estimates were expressed in
cfs per square mile of tributary area, and area adjustments were made for
each site by determining the difference in tributary area between the
site and the downstream gauge.  Irrigation return flow was assumed to
be fifty percent of the average irrigation diversion.  Analysis of
irrigation diversions indicate a surprisingly constant amount diverted
even during dry years.  As an example, it was learned that during 1977,
a relatively dry year, additional outside power was purchased in order
to maintain the supply of irrigation water in the Redlands Project.
A large amount of water is diverted to generate power for pumping a
smaller amount of irrigation water to a higher elevation.  The Orchard
Mesa Project works on a similar principle.  Irrigation return flow was
assumed to be in proportion to the amount of irrigated acreage which
is tributary to the river within designated stretches.   The  return flow
for power development occurs as point inflow as does the Gunnison River.
Tables 8a and 8b summarize the computations and give the estimated
seven-day low flow to be expected once in ten years for  the  five  sites
of interest in this study area.
     To check the validity of the estimated seven-day low  flow values
within this study area, additional area and return flow  adjustments
were made to obtain the estimated seven-day low flow value  for  the
Colorado River gauge site at Cameo.  This was compared with  the  seven-
day low flow value obtained from the Pearson Log III analysis.   A re-
markably close agreement was achieved between  the values derived from
the two methods.  Monthly differences were  expressed as  a  percentage
of the statistically-derived value for the  Cameo gauge.  The seven-day
low flow estimates derived from the downstream gauge varied from 10.3
percent lower to 31.3 percent higher  than the  statistically derived
values.  The monthly percentages averaged 1.5  percent  high.   The months

                                   81

-------
                                TABLE 8a

            SUMMARY OF ESTIMATED 7-DAY LOW FLOWS TO BE EXPECTED
                    ONCE IN 10 YEARS FOR COLORADO RIVER
Gauge
Month State
January
February
March
April
May
June
July
August
September
October
November
December
53.
56.
55.
55.
73.
101.
44.
39.
48.
60.
70.
55.



Number
near 9
Line
0
6
4
0
4
2
3
4
9
2
9
5
50
54
53
43
61
87
33
28
37
48
68
53
.9
.4
.2
.5
.2
.9
.2
.5
.6
.5
.1
.3

Number
7
50.8
54.3
53.1
42.5
60.2
86.8
32.3
27.5
36.7
47.5
68.0
53.2

Sites
Number
5
WR NC
50.6
54.0
52.9
39.1
56.6
83.1
28.8
24.1
33.2
44.0
67.7
52.9
34.6
36.5
36.0
28.6
37.1
45.3
22.4
19.8
25.5
34.0
42.2
36.0



Number
3
WR NC
50.6
54.0
52.8
38.2
55.7
82.2
28.0
23.2
32.3
43.2
67.6
52.9
34
36
36
28
36
44
21
19
25
33
42
36
.6
.5
.0
.0
.5
.7
.8
.0
.0
.4
.2
.0

Number
1
34.1
37.0
36.1
16.8
34.2
60.5
12.0
6.9
12.9
21.7
49.1
35.2
Key:  WR = Whole River
      NC = North Channel only
                                    82

-------
                                 TABLE 8b

            SUMMARY OF ESTIMATED 7-DAY LOW FLOWS TO BE EXPECTED
                    ONCE IN 10 YEARS FOR COLORADO RIVER
                                   (cfs)
Sites
Number
Gauge near 9
Month State Line
January
February
March
April
May
June
July
Augus t
September
October
November
December
1873
1999
1956
1942
2592
3574
1564
1390
1727
2127
2503
1958
1799
1920
1879
1536
2160
3104
1173
1005
1329
1713
2405
1881
Number Number
7 5
WR NC
1795
1916
1875
1502
2125
3066
1140
972
1295
1679
2400
1877
1787
1907
1867
1379
1999
2936
1018
851
1173
1555
2389
1869
1220
1290
1270
1010
1310
1600
790
700
900
1200
1490
1270
Number
3
WR NC
1786
1906
1866
1348
1967
2903
987
820
1142
1524
2387
1868
1220
1290
1270
990
1290
1580
770
670
880
1180
1490
1270
Number
1
1205
1307
1273
592
1207
2137
423
245
454
768
1732
1244
Key:  WR » Whole River
      NC = North Channel only
                                 83

-------
 of  greatest variation occur In April and October, which happen to cor-
 respond with  the beginning and ending months of assumed irrigation.  Fig-
 ures  35 through 38 graphically illustrate the variation in estimated sev-
 en-day low flow values to be expected once in ten years for the Colorado
 River within  the study reach.
     For Stations 3 and 5, the study requires estimates of monthly sev-
 en-day low flow values for the portion of the flow which would be con-
 veyed in the  north channel only.  Figure 1 shows the island which divides
 the river into north and south channels.  On 13 March 1979, a river cross-
 section was obtained of the north channel, and for the period from 15
 January 1979  to 26 September 1979, river height measurements were taken.
 A theoretical rating curve was derived for the north channel using the
 Manning formula for open-channel flow, estimated roughness coefficients
 and utilizing water surface slope as an estimate of energy gradient.  The
 cross-section and rating curve are on Figures B.6 and B.7 of Appendix B.
 Utilizing the gauged flow data at the State Highway 340 Bridge near
 Fruita, estimates of inflow and return flow and the north channel rating
 curve, another curve was developed which relates the computed portion of
 flow in the north channel to the estimated flow in the river.  This curve
 is shown in Figure B.8 in Appendix B.  The data points define a smooth
 relationship  for Colorado River flows above 68 m3/s (2,400 cfs).  The
bottom portion of the curve was estimated without benefit of actual data.
This curve was utilized along with the monthly estimates of seven-day low
flow for the whole river.to estimate the seven-day low flow values to be
expected once in ten years for all of the sites of interest in this study.
                                 84

-------
                                                     FIGURE   35
         ESTIMATED SEVEN DAY LOW FLOW PROFILES
                       COLORADO RIVER
              2S
              i
   KILOMETERS

30         35
                    40
  4000-
cn
u.
O

CO

$ 3000-
Ul
LU
O
2 2000
H
O
ttl
E
x
LU


O
< 1000'
O
f-
            15
                            20
                     I
                     25
                                            /
                              4',
•
E

L~*.r.
	 n:-:n

V—^b i i
*• in
E P
<0 M
FEBRUARY
r* 	 fittftl!fi- 	 	
JANUARY

(O
E
in





Rtsnvir.'.ir.vn



:«r.

•

R
-
                                                            -100
                                    -40
                                                        /
       *C* *C*    Qt




   f/ /



RIVER MILES ABOVE GAUGE NEAR COLORADO-UTAH STATE LINE
                               85
                                       ENGINEERING-SCIENCE, INC.

-------
                                                     FIGURE   36
         ESTIMATED SEVEN DAY LOW FLOW PROFILES

                       COLORADO RIVER
              25
                            KILOMETERS


                                  35
                                            40
                                                      45
  4000
(A
5 3000

U

S 2000

o
u


2
     I


o
< 1000'
o
                M

          •ZT
                                     EE
                                      r.......
•-'	MAV_
                          APRIL

                                                         -H
                                                            -110
                                                            •100
                                                            -90
                                                            -80
                                                            -70
                                                            -60
                                                                5
                                                          L     S



                                                            -50
                                                            -40
                                                            -30
            ,s
             //  /

                                             /

        RIVER MILES ABOVE GAUGE NEAR COLORADO-UTAH STATE LINE
                               86
                                      ENGINEERING-SCIENCE, INC

-------
                                                    FIGURE  37
         ESTIMATED SEVEN DAY LOW FLOW PROFILES
                       COLORADO RIVER
              25
                           KILOMETERS

                                  35
                                            40
                                                      45
  4000-
UL
O

10

4 3000'
W

o
UJ
O
3 2000

O
UJ
0.
X
3
u.

< 1000'
O
                                      v
                                                           -110
                                                            -100
                                                            -90
                                                            -80
                                                            -70
                                                            -60  55
                                                                2
                                                            -50
                                                            -40
                                                            -30
                                                            -20
                 /

        RIVER MILES ABOVE GAUGE NEAR COLORADO-UTAH STATE LINE
                               87
                                       ENGINEERING-SCIENCE, INC.

-------
                                                    FIGURE   38
         ESTIMATED SEVEN DAY LOW FLOW PROFILES
                       COLORADO RIVER
              25
                           KILOMETERS

                        30        35
                                           40
  4000
O

CO

5 3000
UJ
Ul
u
UJ 2000

O
UJ
Q.
X
Ul


O
< 1000
Q
            —H
                  W
                        NOVEMBER
                        DECEMBER
                                      • •••• mm • mm»mm>»m

                                                           -110
                                                           -100
                                                           -90
                                                           -80
                                                           -70
        -60  |



        -50
                                                           -40
                                                         T
                                                          -30
                                                          -20
                                                          -10

            "//

                                   /
                                           I

                                           25
   /
  /
//
 i

/

        RIVER MILES ABOVE GAUGE NEAR COLORADO-UTAH STATE LINE
                              88
                                      ENGINEERING-SCIENCE,  INC.

-------
         SECTION 5




AMMONIA LOADING ALLOCATIONS

-------
                                SECTION 5
                       AMMONIA LOADING ALLOCATIONS

     This section presents the conclusions and recommendations arising
from the 13-month field survey described in earlier sections.   These con-
clusions are based on the premise that to protect endangered and threat-
ened fishes in the study area, un-ionized ammonia concentrations must not
exceed 0.02 mg/Jl, on the average.  Wide background fluctuations of ammonia
concentration were observed during the course of the study, including spor-
adically very high values far exceeding 0.02 mg/S, for brief periods.  All
instances where this criterion was exceeded are especially marked in the
raw field data presented in Appendix A.  The representative background
values determined in Section  4  for temperature, pH,  total  ammonia and
low flow were used  to  compute allowable  loading of ammonia from the two
treatment plants.   A sample of  the computation procedures  used  for  these
allocations is presented  in Appendix  C.
     The summary of monthly representative background conditions and com-
puted un-ionized ammonia under  those  conditions is presented  in Table 9.
For each month, a total ammonia concentration is  computed  that  would be
in equilibrium with the 0.02  mg/«, un-ionized ammonia limit.   Subtracting
this concentration  from background ammonia concentration and  multiplying
this by  the seven-day  low flow  to be  expected once in ten  years gives
the maximum allowable  discharge of ammonia from  the  treatment plants.
     Calculations for  the proposed Grand Junction treatment plant used
the seven-day low flow to be  expected once in ten years estimated for
                                    91

-------
                                                                       TABLE 9


                                               REPRESENTATIVE  MONTHLY  BACKGROUND CONDITIONS
                                                              IN  THE  COLORADO  RIVER
IO
Temperature
Month C
/ \ Background , .

-------
Station 5, the Colorado River downstream of Persigo Wash.  In this
reach, two islands divide the river into two nearly distinct channels,
as shown in Figure 2.  The allowable ammonia loading for low flow in
the north channel (where Persigo Wash enters the river), as well as
for low flow in the whole river, are shown in Tables lOa and lOb and
Figure 39.  The corresponding allowable ammonia concentrations in the
wastewater discharge are computed based on the design flow of 47,000
 o
m /d  (12.5 mgd) and are shown in Table 11.  Unless there is some mech-
anism for dispersing the effluent across the full width of the river,
loading allocations for flows in the north channel provide the safest
conditions for the endangered fishes.
     For the Fruita discharge, flows for Station 9, the Colorado River
downstream of Little Salt Wash, are used to calculate maximum allow-
able ammonia loadings and concentrations, which are independent of  the
allocations for Grand Junction.  These quantities are also given in
Tables lOa, lOb and 11 and Figure 39.  Computations were made assuming
the impact of the present Grand Junction discharges to be negligible
on the background ammonia concentrations.
     For comparison, approximate monthly ammonia loadings during
1978-79 from the two treatment plants are presented in Table 12.  Am-
monia discharges from the existing Grand Junction treatment plant were
well within the calculated allowable loadings  (assuming  that dilution
with  the whole river is available) for all months except September,
when discharges exceeded the allowable loadings by about 70 kg/day
(150 Ib/day).  It is important to note that this is a conservative
estimate since it is computed using an average daily flow based on
flow during peak hours.  In the Fruita treatment facility, ammonia  dis-
charges for all months were far below the allowable loading.

CONCLUSIONS AND RECOMMENDATIONS
     Maximum allowable wasteload allocations  for both treatment  facil-
ities vary dramatically, from highly restrictive quantities  in  the
September low-flow period to fairly high  quantities during  the  rest of
the year.  From these tabulations, it appears that  discharge
                                  93

-------
                               TABLE lOa

                  MAXIMUM AMMONIA LOADING ALLOCATIONS
                       TO THE COLORADO RIVER(a>
                               (kg/day)
Month

January
February
March
April
May
June
July
August
September
October
November
December
Grand Junction Wastewater Fruita Wastewater
Treatment Facility Only(b) Treatment Facility Only(c.
Whole River
3,700
4,000
3,200
2,800
6,900
14,400
3,300
440
140
500
2,200
5,100
North Channel
2,500
2,700
2,100
2,100
4,600
7,800
2,600
360
110
380
1,400
3,400

3,700
4,000
3,200
3,100
7,500
15,200
3,800
520
160
550
2,200
5,100
   These allocations are the maximum loadings from either treatment
   facility that would result in an instrearn un-ionized ammonia concen-
   tration of 0.02 mg/£.  They are NOT recommended loadings; neither
   are they to be considered additive for Grand Junction and Fruita.
b°vProposed wastewater treatment facility at Persigo Wash.
   Existing and proposed-to-be-expanded wastewater treatment facility
   at Little Salt Wash.
                                  94

-------
                                TABLE 10b

                   MAXIMUM AMMONIA LOADING ALLOCATIONS
                        TO THE COLORADO RIVERA)
                                (ib/day)
Month

January
February
March
April
May
June
July
August
September
October
November
December
Grand Junction Wastewater Fruita Wastewater
Treatment Facility Only(b) Treatment Facility Only(cl
Whole River
8,200
8,800
7,100
6,200
15,200
31,800
7,300
970
310
1,100
4,900
11,200
North Channel
5,500
6,000
4,600
4,600
10,100
17,200
5,700
790
240
840
3,100
7,500

8,200
8,800
7,100
6,800
16,500
33,500
8,400
1,100
350
1,200
4,900
1,100
(a)
   These allocations are the maximum loadings from either treatment
   facility that would result in an instream un-ionized ammonia concen-
   tration of 0.02 mg/l.  They are NOT recommended loadings; neither
x^are they to be considered additive for Grand Junction and Fruita.
/c\Proposed wastewater treatment facility at Persigo Wash.
   Existing and proposed-to-be-expanded wastewater treatment facility
   at Little Salt Wash.
                                    95

-------
                           AMMONIA LOADING ALLOCATIONS

                                TO THE COLORADO RIVER
c
9
    CO
    •o
    §
    UJ
    O
    oc
    O
    (0

    5
z
o
t


'

'
a

m
n
UJ
-I
ffl

0
O
                                                        GRAND JUNCTION (PERSIGO WASH) WASTEWATER

                                                         TREATMENT PLANT

                                                          WHOLE RIVER
                                                          NORTH CHANNEl
                                                    FRUITA WASTEWATER TREATMENT FACILITY
             JAN   FEB   MAR   APR   MAY   JUN   JUL   AUG   SEP   OCT   NOV   DEC
                                                                                            o
                                                                                        co
                                                                                        CO

-------
                               TABLE 11

                    MAXIMUM AMMONIA CONCENTRATION IN
                        WASTEWATER DISCHARGED TO
                           THE COLORADO RIVER
Month
Grand Junction Wastewater       Fruita Wastewater
Treatment Facility Only*    Treatment Facility Only*

January
February
March
April
May
June
July
August
September
October
November
December
Whole River
78
85
68
59
146
304
70
10
3
11
46
108
North Channel
53
57
44
44
97
165
55
8
2
8
30
72

782
845
676
655
1,585
3,213
803
110
34
116
465
1,078
 These concentrations correspond to the-maximum ammonia loading alloca-
 tions for the design flows of 47,000 m /d (12.5 mgd) for Grand Junc-
 tion and 4,700 m/d (1.25 mgd) for Fruita.  They are NOT recommended
 concentrations; neither are they to be considered additive for Grand
 Junction and Fruita.
                                   97

-------
                              TABLE 12

                AMMONIA LOADINGS INTO COLORADO RIVER
             FROM GRAND JUNCTION AND FRUITA WASTEWATER
                  TREATMENT FACILITIES IN 1978-79
Grand Junction (a)
Total
Ammonia Cone. Ammonia Load
Month (mg/Jl) (kg/day)
January
February
March
April
May
June
July
August
September
October
November
December
Average
17.11
8.06
14.39
23.03
12.76
8.05
2.82
10.49
8.63
11.84
11.14
16.41
12.06
415
196
349
558
310
195
68
254
209
287
270
398
292
Fruit
Total
Ammonia Cone.
(mg/jO
11.43
0.31
11.51
5.45
8.87
3.17
0.40
2.91
0.65
3.04
4.36
9.75
5.15
:a(b>
Ammonia Load
(kg/day)
14
0.4
14
7
11
4
0.5
4
0.8
4
5
12
6
*Average daily flow:   24,000 m3/d (6.4 mgd) assumed constant
throughout year.              ,
 verage daily flow:    1,400 m /d (0.32 mgd) assumed constant
throughout year.
                                   98

-------
allocations of ammonia should be made on a month-by-month basis.  How-
ever, a generalized seasonal recommendation would be possible, if the
most restrictive allocations were to be applied to the adjacent months.
Thus, the seasonal allocations for Grand Junction would be:  Summer
(August through October), 110 kg/day (240 Ib/day); Fall (November
through January), 1,400 kg/day (3,100 Ib/day); Winter (February through
April), 2,100 kg/day (4,600 Ib/day); and Spring (May through July),
2,600 kg/day (5,700 Ib/day).  For Fruita, the corresponding ammonia
allocations would be:  Summer, 160 kg/day (350 Ib/day); Fall, 2,200
kg/day (4,900 Ib/day); Winter, 3,100 kg/day  (6,800 Ib/day); and Spring,
3,800 kg/day (8,400 Ib/day).  It should be noted that these allocations
for the two treatment facilities are the maximum loading from either
facility that would result in an instream ammonia concentration of 0.02
mg/Jl.  They are not recommended loadings; neither are they to be con-
sidered additive for Grand Junction and Fruita.
     Another recommendation, equally important to safeguard fish from
the localized effects of discharge of the Grand Junction treatment plant
effluent, is use of diffuser outfalls for quick dispersal of ammonia
and its dilution across the whole river flowstream.  Early in the study
period, the dye tracer study demonstrated that the river water mixes
rather slowly, and for long reaches, remains separated into varying
dilution zones.  Therefore, if the treatment plant effluent was wholly
discharged into the northern channel of the  river, it is possible that
high concentrations of ammonia would prevail in a narrow band along
the north bank, producing a potentially toxic zone for fish.  Yet, none-
theless, the clear separation of the north channel from the rest of the
river implies the existence of a "safe" zone of passage—not affected
by the wastewater discharge—along the south channel.
                                    99

-------
FUTURE CONSIDERATIONS
    It is conceivable  that further studies such as  fish bioassays and
investigations of nonpoint source discharges will result in relaxation
of the presently recommended criterion of 0.02 mg/& un-ionized ammonia
for freshwater aquatic life.  The analysis and allocations presented
in this report are wholly based on this criterion.  If this standard
should be relaxed in the future, it would result in a dramatic in-
crease in allowable ammonia loadings to the river.  For example, a
revision of the criterion to 0.06 mg/£ un-ionized ammonia will result
in loadings shown in Table 13.  At these loadings, the wastewater
treatment facilities would not require ammonia control at any time of
the year.  However, until further studies prove otherwise, there
should be provisions for ammonia control during the critical months of
the year to ensure year-round maximum protection of the threatened and
endangered fishes.
                                  100

-------
                               TABLE 13

                MAXIMUM AMMONIA LOADING TO THE COLORADO
                    RIVER FOR 0.06 mg/£ STANDARD^3)
                               (kg/day)
Month

January
February
March
April
May
June
July
August
September
October
November
December
Grand Junction Wastewater Fruita Wastewater
Treatment Facility Only(b) Treatment Facility Only(c^
Whole River
12,000
13,600
11,100
9,600
22,600
45,500
10,800
2,100
1,500
2,900
8,800
16,900
North Channel
8,700
9,200
7,600
7,000
14,800
24,900
8,400
1,700
1,200
2,200
5,500
11,500

12,800
13,700
11,200
10,700
24,400
48,100
12,400
2,500
1,700
3,100
8,800
17,000
(a)
^ 'These are the maximum loadings from either treatment facility that
   would result in an instream un-ionized ammonia concentration of
   0.06 mg/H.  They are NOT recommended loadings; neither are they to
. .be considered additive for Grand Junction and Fruita.
, ^Proposed wastewater treatment facility at Persigo Wash.
^Existing and proposed-to-be-expanded wastewater treatment facility
   at Little Salt Wash.
                                   101

-------
 SECTION 6




REFERENCES

-------
                                SECTION 6

                               REFERENCES
Binder, Charles W., G.  Bargsten, B. F. Marcuro, £t al.   Grand Valley
    Salinity Control Demonstration Project Basle Field  Data.  September
    1968 to November 1976.  Department of Agricultural  and Chemical
    Engineering, Colorado State University, Fort Collins, Colorado.
    June 1978.

Colorado Department of Health, Water Quality Control Division.  "Report
    on the Investigation of the Water Quality of the Colorado River,
    Dotsero, Colorado to Utah Border."  Denver, Colorado.  January 1976.

Colorado West Area Council of Governments.  Colorado West Area Draft 208
    Plan.  Draft Main Report and Final Technical Appendices.  Rifle,
    Colorado.  December 1977.

Davis, E.M., T. D. Downs and W. G. Gray.  "Ammonia in Texas Streams
    During Low Flow from Municipal Wastewater."  Water Resources
    Bulletin, Vol. 14, No. 6.  American Water Resources Association.
    December 1978.

Engineering-Science.  Ammonia Toxicity Study in the Colorado River Near
    Grand Junction. Colorado.  Preliminary Report.  Berkeley, California.
    April 1979.

European Inland Fisheries Advisory Commission Working Party on Water
    Quality Criteria for European Freshwater Fish.  "Water Quality
    Criteria for European Freshwater Fish," Water Research.  Vol. 7
    Pergamon Press 1973.

Henningson, Durham & Richardson.  Grand Junction/Mesa County, Predesign
    Report for Wastewater Treatment Facilities and Interceptor Sewers.
    Denver, Colorado.  August 1977.

Henningson, Durham & Richardson.  Predesign Report Relating to Seasonal
    Ammonia Nitrogen Requirements Summary of Cost Evaluations.  Supple-
    ments No. 1 and 2.  Denver, Colorado.  November and December 1977.
                                    105

-------
 Nelson, Haley, Patterson and Quirk, Inc.  Water Quality Management Flan
     Colorado River Basin.  Volumes 1, 2 and 3.  Colorado Department of
     Health, Water Quality Control Division.  Denver, Colorado.   June
     1975.

 Nelson, Haley, Patterson and Quirk, Inc.  Facilities Plan - City of
     Grand  Junction, Colorado.  Grand Junction, Colorado.  August 1975.

 Nelson, Haley, Patterson and Quirk, Inc.  201 Wastewater Treatment Facil-
     ities  Plan for Town of Fruita, Colorado. Grand Junction, Colorado.
     September 1977.

 U.  S.  Environmental Protection Agency.   Quality Criteria for Water.
     Washington,  D.  C.   July 1976.

 U.  S.  Environmental Protection Agency,  Technical Investigations Branch,
     8S-TI.   "Report of the Intensive Water Quality Study on the Colorado
     River  Near the Grand Junction Sewage Treatment Plant, October 18-21,
     1976." Denver,  Colorado.  November 1976.

 U.  S.  Environmental Protection Agency Region VIII.  "Negative Declara-
     tion,  Proposed  Wastewater  Treatment Facility, Grand Junction,
     Colorado."  Denver,  Colorado.  February 20,  1976.

 U.  S.  Environmental Protection Agency Region VIII.  "Negative Declara-
     tion,  Wastewater Treatment Facility, Fruita,  Colorado."  Denver,
     Colorado.  July 14,  1978.

 U.  S.  Environmental Protection Agency Region VIII.  "Amendment  Negative
     Declaration, Wastewater Treatment Facility,  Grand  Junction, Colorado."
     Denver,  Colorado.  July 19,  1978.

 Whittig, Lynn  D.  "Salinity Investigations in the West Salt Creek Water-
     shed,  Colorado."  Project  Proposal and Work  Plan.   Department of
     Land, Air  and Water  Resources,  University of  California,  Davis.
     April  1979.

 Willingham, William T.   Ammonia Toxicity.   Control Technology Branch,
     Water Division,  U. S.  Environmental  Protection Agency,  Region VIII.
     February 1976.

Willingham, W. T.,  J. E. Colt,  J. A.  Fava, £t_ al.   "Ammonia," in  A Review
     of the EPA Red  Book;   Quality Criteria for Water.   R. B. Thurston,  e_t
     al. (Eds.)  Water Quality Section, American Fisheries Societies.
     Bethesday, Maryland.   1979.
                                   106

-------
        APPENDIX A




WEEKLY WATER QUALITY DATA

-------
                               SUMMER INTENSIVE SURVEY
WEEK *1
DATE} 9/ 8/78
STATION
NUMBER
TIME
TEMPERATURE* PH
DEG.C
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIA* MG/L UN-IONIZED AMMONIA*
(NH3 AS N> (NH3 AS N) MG/L (NH3 AS
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
3A
3B
3C
4
4
5A
SB
5C
5D
5E
5F
SO
5A
SB
5C
SO
SE
5F
SO
6
7A
7B
7C
7D
7A
1350
1346
1342
1338
1334
1330
1300
1040
1044
1048
1900
1904
1908
950
1845
1010
1012
1015
1017
1020
1022
1025
1830
1833
1836
1839
1842
1845
1848
830
800
803
806
810
1750
20
19
19
19
20
20
22
18
18
18
20
20
2O
17
21
17
17
18
18
18
18
18
20
21
21
20
20
20
20
19
18
18
18
18
20
.0
•
«
t
»
•
•
•
*
*
*
*
*
*
*
•
*
*
f
»
*
•
•
•
•
t
•
•
»
*
*
•
*
•
•
8
8
8
1
4
9
6
7
6
6
4
4
3
4
8
9
3
4
4
5
6
8
1
0
9
9
8
7
7
4
4
5
6
7
8.2
8.3
8.3
8.3
8.3
8.3
7.4
8.0
8.0
8.0
8.2
8.2
8.2
8.0
8.1
7.9
8.0
8.0
8.0
8.0
8.0
8.0
8.1
8.1
8.1
8.1
8.1
8.1
8.2
9.9
8.0
8.1
8.1
8.1
8.1
0.99
1.23
1.40
0.99
0.90
1.64
8.06
0.99
0.65
O.5O
N/A
0.50
0.59
0.29
0.50
0.65
0.38
0.53
0.43
0.38
0.39
0.29
0.43
N/A
1.56
0.55
1.89
0.38
0.99
0.99
N/A
0,65
0.43
0.50
0.65
0
0
0
0
0
O
O
0
0
0
.05845
.08937
.10128
.07149
.06688
,12410
.09800
.03414
.02264
.O1736
INSUFFICIENT
0
0
0
0
0
0
0
0
0
0
0
0
. 03054
.03605
.00907
.02632
.01698
.01245
.01782
.01459
,01290
.01328
.00996
.02153
INSUFFICIENT
0
0
0
0
0
0
.07975
.02793
.09588
,01904
.06132
.74537
INSUFFICIENT
0
0
0
0
.02765
.01833
.02166
.03248
**
**
**
**
**
**
STP
**
**

DATA
**
**

**







**
DATA
**
**
**

**
STP
DATA
**

**
**
0.06016
0.09212
0.10460
0.07398
0.06933
0.12885

0.03864
0.02557
0.01957

0.03054
0.03605
0.01238
0.02632
0.01933
0.01413
0. 02017
0.01647
0.01453
0.01492
0.01116
0.02255

0.08354
0.02926
O. 10044
O. 01995
O. 06420


0.03260
0,02158
0.02545
0,03248
N)
**
**
**
**
**
**

**
**


**
**

**


**




**

**
**
**

**


**
**
**
**
NOTE: * INDICATES UN-IONIZED AMMONIA  CONCENTRATION  IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5                                      Mr>
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES  C  THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
o
WEEK *1
(Continued)
DATE: 9/ 8/78
STATION
NUMBER

7B
7C
70
8
8
9A
93
9C
9D
9E
9F
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME

1754
1758
1802
830
1745
815
816
817
818
819
82O
1719
1722
1725
1728
1731
1734
1705
1708
1711
1714
1717
TEMPERATURE f
DEG.C

20.6
20.7
20.7
17.5
21.8
18.1
17.9
18.2
18.4
18.4
18.6
20.9
20.8
20.8
20.7
20.8
21. 0
21.5
21.4
21.4
20.8
20.7
PH

8.1
8.0
8.1
8.1
8.1
8.1
8.1
8.0
8.1
8.1
8.0
8.3
8.2
8.1
8.2
8.1
8.1
8.0
8.0
7.9
8.1
8.1
TOTAL
AMMONIAfMG/L
(NH3 AS N)
0.81
0.53
0.53
0.50
0.69
0.99
0.76
0.76
1.07
0,70
0.38
N/A
0.49
0.75
0.77
1.32
N/A
0.99
0.77
1.15
0.50
0.50
UN-IONIZED
AMMONIAf MG/L
(NH3 AS N)
0.04002 **
0.02112 **
0.02631 **
0.02003 **
0.03725 **
0.04112 **
0.03108 **
0.02544 **
0.04551 **
0.02975 **
0.01309
INSUFFICIENT DATA
0.03036 **
0.03767 **
0.04803 **
0.06624 **
INSUFFICIENT DATA
0.04187 **
0.03257 **
0.03887 **
0.02525 **
0.02508 **
TIME ADJUSTED
UN-IONIZED AMMONIA.
MG/L 
-------
UEEK *2


DATE:  9/19/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
SA
SB
5C
SD
5E
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
1OB
IOC
10D
10E
TIME
1245
1248
1251
1255
1258
1301
1420
1500
1505
1510
1515
1530
1532
1534
1536
1538
1540
1545
1850
1817
1820
1823
1825
1845
1855
1858
1900
1902
1904
1906
1910
1912
1914
1916
1917
TEMPERATURE. PH
DEG.C
14.6
14.6
15.0
14.9
15.0
N/A
20.7
14.6
14.6
14.6
14.7
14.6
14.7
14.8
14.7
14.7
14.7
14.6
14.8
14.5
14.5
14.2
14.6
14.1
14.4
14.3
14.3
14.2
14.4
14.4
14.0
14.1
14.1
14.3
14.4
8.3
8.0
8.5
8.5
8.5
N/A
7.4
8.3
8.5
8.5
8.5
8.2
8.2
8.2
8.3
8.3
8.3
8.3
8.8
8.2
8.2
8.3
8.2
8.2
8.3
8.3
8.3
8.4
8.5
8.3
8.0
7.9
7.9
8.5
8.4
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA. MG/L AMMONIA. MG/L UN-IONIZED AMMONIA.

-------
WEEK #3


DATE5  9/26/78
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1100
1105
1110
1115
1120
1125
1135
1355
1353
1350
1245
1250
1253
1255
1257
1300
1310
1320
1540
1525
1530
1535
1537
1545
1555
1557
1558
1600
1605
1607
1610
1613
1615
1617
1620
TEMPERATURE* PH TOTAL UN-IONIZED TIME ADJUSTED
DEG.C AMMONIA.MG/L AMMONIA* MG/L UN-IONIZED AMMONIA*
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N>
15.0
16.0
14.0
16.0
16.0
16.0
22.0
17.5
17.5
17,0
16.0
16.5
16.5
16.5
16.5
16.5
16.5
17.0
17.0
18.0
18.0
18.0
N/A
18.0
18.0
18.0
18.0
18.0
18.0
18.0
18.5
18.5
18.5
18.0
N/A
8.2
8.2
8.2
8.2
8.2
8.2
7.9
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.1
8.2
8.2
8.2
8.8
8.2
8.2
8.2
N/A
8.3
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.1
8.2
N/A
1.08
0.63
0.48
0.66
0.78
0.32
9.79
0.53
0.41
0.38
0.42
0.39
0.39
0.50
0.73
0.26
0.18
0.26
0.65
0.26
0.44
0.15
N/A
0.24
0.02
0.21
0.60
0.19
0.30
0.30
0.24
0.30
N/A
0.19
N/A
0.04481 **
0.02794 **
0.01845
0.02941 **
0.03493 **
0.01434
0.34449 STP
0.02619 **
0.02046 **
0.01817
O.O1875
0.01791
0.01791
0.02325 **
0.02720 **
0.01219
0.00838
0.01264
0.10864 STP
0.01356
0.02289 **
0.00763
INSUFFICIENT DATA
0.01527
0.00127
0.01102
0.03094 **
0.00975
0.01568
0.01568
0.01273
0.01624
INSUFFICIENT DATA
0.00975
INSUFFICIENT DATA
0.05031 **
0.03126 **
O.O20A3 **
0.03274 **
0.03879 **
0.01588

0.02691 **
0.02104 **
0.01871
0,02154 **
0.01799
0.01800
0.02337 **
0.02736 **
0.01227
0.00845
0.01276

0.01356
0.02289 **
0.00763

0.01527
0.00127
0.01102
0,03094 **
0,00975
0.01568
0.01568
O.O1273
0.01624

0.00975

 NOTE:  *  INDICATES UN-IONIZED  AMMONIA  CONCENTRATION  IN RIVER GREATER  THAN  0.02  MG/L
       AND  PH  GREATER  THAN  OR  EQUAL  TO 8.5
       ** INDICATES  UN-IONIZED AMMONIA CONCENTRATION IN  RIWER GREATER THAN 0.02 MG/L
       AND  PH  LESS THAN  8.5
       IF TEMPERATURE  LESS  THAN 5.0  DEGPFF5  C  THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES

-------
                    WEEK *4

                    DATE: io/ 3/73
u>
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
50
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIHE
1805
1808
1815
1820
1825
1830
1750
N/A
N/A
N/A
1420
1425
1430
1435
1440
1442
1445
1450
1615
1555
1600
1610
1650
1618
1625
1626
1627
1628
1629
1630
1630
1635
1640
1642
1645
TEMPERATURE* PH
DEG.C
16.5
16.5
15.5
15.5
16.0
16. 0
22.5
N/A
N/A
N/A
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
18.0
16.5
16.0
16.0
16.0
16.5
16.5
16.0
16. 0
16.0
16.0
16.0
20.0
19.0
17.0
16.0
16.0
8.3
8.3
8.2
8.3
8.3
8.3
8.0
N/A
N/A
N/A
8.1
8.2
8.3
8.4
8.4
8.5
8.5
8.4
8.8
8.3
8.3
8.3
8.3
8.2
8.3
8.3
8.3
8.3
8.2
8.3
8.3
8.2
8.3
8.3
8.3
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA.MG/L AMMONIA* MB/L UN-IONIZED AMMONIA,
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.63
0.55
0.67
0.33
0.06
0.06
11.02
N/A
N/A
N/A
0.25
0.17
0.11
0.13
0.17
0.06
0.03
0.02
1.28
O.02
0.02
0.02
0.02
0.02
0.02
0.03
0.02
0.02
0.02
0.02
0.04
0.06
0.02
0.02
0.02
0.03603 **
0.03176 **
0.02873 **
0.01766
0.00320
0.00320
0.50087 STP
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
0.00850
0.00718
0.00554
0.00847
0.01111
0.00459
0.00262
O.O0106
0.22816 STP
0,00095
0.00137
0.00092
0.00092
0.00076
0.00095
0.00183
0.00092
0.00137
0.00074
0.00137
0.00302
0.00318
0.00147
0.00092
0.00092
0.03603 **
0.03176 **
0.02873 **
0.01766
0.00320
0.00320




0.00889
0.00734
0.00567
0.00867
0.01139
0.00470
0.00269
0.00109

0.00095
0.00137
0.00092
0.00092
0.00076
0.00095
0.00183
0.00092
0.00137
0.00074
0.00137
0.00302
0.00318
0.00147
0,00092
0.00092
                    NOTE:  * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN  RIVER  GREATER  THAN 0.02 MG/L
                          AND PH GREATER  THAN  OR EQUAL TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND PH LESS THAN 8.5
                          IF TEMPERATURE  LESS  THAN 5.0 DEGREES  C  THEN  UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES  C

-------
 WEEK *5


 DATE:  10/12/78
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SD
5E
5F
56
6
7A
7B
7C
70
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1440
1448
1508
1502
1500
1456
1355
N/A
N/A
N/A
1545
1520
1523
1525
1527
1530
1532
1535
1700
1650
1652
1654
1655
1705
1710
1712
1714
1716
1718
1720
1725
1727
1730
1733
1735
TEMPERATURE. PH
DEG.C
14.5
14.5
14.5
15.0
15.0
14.5
21.0
N/A
N/A
N/A
15.5
15.0
15.0
15.0
15.5
15.5
15.5
15.5
23.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
8.3
8.4
8.4
8.5
8.5
8.4
7.6
N/A
N/A
N/A
8.2
8.3
8.3
8.4
8.5
8.6
8.6
8.7
9.0
8.6
8.6
8.6
8.5
8.3
8.4
8.5
8.5
8.5
8.5
8.6
8.2
8.2
8.2
8.4
8.5
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L AMMONIA. MG/L UN-IONIZED AMMONIA.
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N>
0.26
0.22
0.28
0.17
0.12
0.12
11.84
N/A
N/A
N/A
0.17
0.10
0.17
0.13
0.16
0.17
0.17
0.16
1.32
0.13
0.12
0.12
0.12
0.12
0.12
0.10
0.07
0.10
0.07
0.07
0.07
0.07
0.10
0.10
0.07
0,01315
0.01379
0.01737
0.01376
0.00983
0.00766
0.19806 STP
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
0.00745
0.00511
0.00895
0.00847
0.01289
0.01756
0.01756
0.02052 *
0.43753 STP
0.01384
0.01298
0,01298
0.01054
0.00686
0.00852
0.00843
0.00632
0.00843
0.00562
0.00779
0.00331
0.00331
0.00441
0.00681
0.00632
0.01322
0.01381
0.01737
0.01368
0.00978
0.00764




0.00745
0.00537
0.00939
0.00888
0.01351
0.01838
0.01838
0.02145 *

0.01384
0.01298
0.01298
0.01054
0.00686
0.00852
0.00843
0.00632
0.00843
0.00562
0.00779
0.00331
0.00331
0.00441
0.00681
0.00632
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                     UEEK *6

                     DATE: 10/20/79
H*
l/i
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
50
5E
5F
56
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
1OA
10B
IOC
100
10E
TIME
1210
1212
1235
1240
1242
1245
1225
N/A
N/A
N/A
1200
1120
1125
1130
1135
1140
1145
1150
930
920
917
915
1005
933
937
939
941
942
943
945
1000
957
955
952
950
TEMPERATURE? PH
DEG.C
11.0
11.0
12.0
11.5
12.0
12.0
19.5
N/A
N/A
N/A
11.5
11.0
11.0
11.5
11.5
11.5
12.0
11.5
12.0
11.0
11.5
11.0
12.0
10.5
11.5
11.0
11.0
11.0
12.0
11.5
11.0
11.0
10.0
11.5
12.0
8.3
8.4
8.5
8.5
8.5
8.5
7.7
N/A
N/A
N/A
8.5
8.5
8.5
8.5
8.5
8.6
8.6
8.5
8.5
8.4
8.4
8.4
8.5
8.4
8.4
8.4
8.4
8.5
8.5
8.5
8.4
8.4
8.4
8.4
8.4
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIAr MG/L UN-IONIZED AMMONIAr

-------
UEEK *7

DATE: 10/26/73
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9c
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1310
1315
1320
1325
1330
1345
1300
1725
1730
1735
1738
1740
1743
1745
1747
1750
1755
18OO
1540
1530
1532
1535
1620
1545
1550
1555
1557
1600
1601
1602
1603
1604
1606
1608
1610
TEMPERATURE F PH
DEG.C
9.0
9.0
9.5
9.5
10.0
10.0
18.5
11.0
11.0
11.5
11.5
11.5
11.5
11.5
11.0
11.0
11.0
11.5
13.0
10.5
10.0
11.0
11.0
11.0
11.0
10.5
10.5
10.5
10.0
10.0
11.0
12.0
12.0
10.5
10.5
8.2
8.4
8.4
8.3
8.4
8.4
7.7
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.3
8.3
8.3
8.3
8.3
8.3
8.3
8.4
8.4
8.4
8.3
8.3
8.3
8.3
8.3
8.2
8.2
8.3
8.3
TOTAL
AMMONIArMG/L
(NH3 AS N)
0.04
0.04
0.04
0.04
0.04
0.04
12,99
0.04
0.08
0.10
0.06
0.30
0.04
0.04
0.04
0.04
0.04
0.04
5.37
0.04
0.04
0.04
0.04
0.04
0.05
0.16
0.19
0.04
0.14
0.14
0.04
0.04
0.60
0.04
0.04
UN-IONIZED TIME ADJUSTED
AMMONIAf MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L (NH3 AS N)
0.00109
0.00171
0.00177
0.00142
0.00184
0.00184
0.22762 STP
0.00127
0.00254
0.00317
0.00185
0.00978
0.00132
0.00132
0.00127
0,00127
0.00159
0.00165
0.24065 STP
0.00153
0.00147
0.00159
0.00159
0.00198
0.00238
0.00725
0.00704
0.00153
0.00501
0.00501
0.00159
0.00137
0.02002 **
0.00153
0.00153
0.00115
0.00179
0.00186
0.00148
0.00192
0.00190

0.00127
0.00254
0.00317
0.00185
0.01028
0.00139
O.OO139
0.00134
0.00134
0.00167
0.00173

0.00153
0.00147
0.00159
0.00159
0.00198
0.00238
0.00725
0.00704
0.00153
0.00501
0.00501
0.00159
0.00137
0.02002 **
0.00153
0.00153
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
WEEK *8

DATE:  10/30/79
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
SE
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIHE
1130
1135
1740
1730
1725
1720
1120
1450
1454
1456
1500
1503
1505
1507
1510
1512
1515
1520
1615
1605
1610
1612
1650
1618
1620
1622
1625
1627
1630
1632
1634
1635
1636
1638
1640
TEMPERATURE* PH
DEG.C
9.5
9.0
9.7
9.6
9.5
9.5
18.8
9.8
9.4
9.4
9.5
10.0
9.5
9.5
9.6
9.4
9.5
9.6
11.3
9.4
9.6
10.0
9.5
9.6
9.B
9.5
9.4
9.4
9.5
9.5
10.4
10.4
10.4
9.4
9.5
8.3
8.3
8.3
8.4
8.4
8.4
7.4
8.
8.
8.
8.
8.
8.
8.4
8.4
8.4
8.4
8.5
8.6
8.4
8.3
8.3
8.3
8.3
8.4
8.4
8.4
8.5
8.5
8.5
8.2
8.2
8.2
8.5
8.4
TOTAL
AMMONIA* MG/L
(NH3 AS N>
0.21
0.14
0.29
0.90
0.31
0.53
12.01
0.07
0.30
0.13
0.17
0.67
0.02
0.25
0.20
0.73
0.02
0.32
3.04
0.47
0.28
0.08
0.72
0.16
1.64
0.07
0.04
0.21
0.07
0.04
0.99
1.15
1.23
0.07
0.04
UN-IONIZED TIME ADJUSTED
AMMONIA* MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L 
0.00710
0.00464
0.01009
0.03925 **
0.01346
0.02302 **
0.10870 STP
0.00326
0.01265
0.00562
0.00744
0.03O15 t*
0.00071
0.01O98
0.00856
0.03128 **
0.00071
0.01732
0.23085 STP
0.02003 **
0.00972
0.00295
0.02478 **
0.00543
0.07244 **
0.00283
0.00176
0.01138
0.00397
0.00220
0.02918 **
0.03404 **
0.03647 **
0.00394
0.00177
0.00789
0.00515
0.01O09
0.03925 **
0.01346
0.02302 **

0.00326
0.01263
0.00561
0.00747
0.03106 **
0.00073
0.01132
0.00883
0.03229 **
0.00073
0.01821

0.02003 **
0.00972
0.00295
0.02498 **
0.00543
0.07244 **
0.00283
O.O0176
O.O1138
0.00397
O.O0220
0.02918 **
0.03404 **
0.03647 **
0.00394
0.00177
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                      WEEK *9

                      DATE:  ii/  9/78
00
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
SC
SD
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
1OA
10B
IOC
10D
10E
TIKE
1420
1425
1430
1435
1440
1450
1340
830
835
840
845
850
853
855
859
905
907
910
1550
1556
1558
1600
1640
1605
1607
1610
1612
1615
1620
1623
1625
1626
1627
1628
1630
TEMPERATURE » PH
DEG.C
8.6
8.6
8.8
8.8
8.9
9.4
17.8
7.8
7.6
7.6
7.8
7.9
7.9
7.7
7.5
7.5
7.5
7.5
9.4
9.0
9.0
9.6
9.6
9.4
9.4
8.9
8.9
8.8
8.9
8.8
11.9
11.2
9.9
8.6
8.7
8.5
8.6
8.6
8.6
8.5
8.5
7.5
8,4
8.4
8.4
8,3
8,4
8.4
8.4
8,5
8.3
8.3
8.3
8.6
8.5
8,5
8,5
8.5
8.5
8.3
8,5
8.5
8.5
8.5
8.5
8.1
8.2
8.3
8.5
8.5
TOTAL
AMMONIA* MG/L

0.04
0.06
0.01
0.01
0.01
0.01
11.27
0.03
0.02
0.04
O.04
0.11
0.04
0.01
0.02
0.02
0.01
0.01
4.44
0.02
0.04
0.03
0.04
0.04
0.02
0.01
0.01
0.02
0.02
0.02
O.01
0.01
0.01
0.02
0.01
UN-IONIZED TIME ADJUSTED
AMMONIAr MG/L UN-IONIZED AMMONIA.
(NH3 AS N> MG/L 
-------
                     WEEK #10

                     DATE:  11/13/79
VO
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
13SO
1355
1430
1420
1415
1410
1330
1615
1620
1623
163O
1633
1635
1637
1640
1641
1643
1645
1510
1508
1504
1500
1550
1515
1520
1525
1529
1532
1535
1537
1540
1541
1542
1543
1545
TEMPERATURE , PH
DEG.C
6.1
6.1
6.5
7.1
7.1
7.3
15.9
6.5
6.5
6.1
7.7
6.8
6.8
6.7
6.7
6.7
6.6
6.7
7.9
6.9
6.9
7.0
7.5
7.5
6.9
6.9
6.9
6.9
6.9
6.9
9.2
9.2
7.6
6.9
7.0
8.1
8.1
8.0
8.0
8.0
8.0
7.4
7.9
8.1
8.0
8.0
8.0
8.0
8.0
8.0
8.1
8.0
7.9
8.1
8.0
8.0
8.0
8.0
7.9
8.0
8.0
8.0
8.0
8.0
8.0
7.8
7.9
8.0
8.0
8.0
TOTAL
AMMONIA, MG/L
(NH3 AS N)
0.13
0.13
0.17
0.22
0.16
0.14
11.76
0.14
0.14
0.12
0.13
0.12
0.07
0.09
0.10
0.10
0.12
0.07
3.13
0.06
0.07
0.06
0.12
0.13
0.06
O.O6
0.06
0.03
O.O4
0.03
0.01
0.01
0.01
0.06
0.06
UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L UN-IONIZED AMMONIA,
(NH3 AS N) MG/L (NH3 AS N)
0.00223
0.00223
0.00240
0.00324
0.00228
0.00207
0.08594 STP
0.00155
0.00244
0.00166
0.00201
0.00176
0.00105
0.00128
0.00140
0.00175
0.00173
0.00074
0.06089 STP
0.00083
0.00075
0.00083
0.00173
0.00158
0.00083
0.00083
0.00083
0.00047
0.00059
0.00047
0.00009
0.00011
0.00012
0.00083
0.00083
0.00230
O.O0229
0.00243
0.00329
0.00232
0.00212

0.00155
0.00244
0.00166
0.00201
0.00185
0.00111
0.00135
0.00147
0.00185
0.00183
0.00078

0.00082
0.00094
0.00083
0.00173
0.00154
0.00083
0.00083
0.00083
0.00047
0.00059
0.00047
0.0000V
0.00011
0.00012
0.00083
0.00083
                     NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                           AND PH GREATER THAN OR EQUAL TO 8.5
                           ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                           AND PH LESS THAN 8.5
                           IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                    UEEK *11

                    DATE: 11/20/79
to
O
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
SA
SB
5C
5D
5E
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1400
1405
1410
1413
1417
1420
1345
1445
1447
1448
1449
1450
1452
1454
1456
1457
1458
1500
1550
1550
1555
1557
1600
1605
1610
1612
1614
1616
1618
1620
1621
1622
1623
1624
1625
TEMPERATURE* PH
DEG.C
5.6
5.9
4.8
4.8
5.O
5.1
15.4
5.1
5.1
5.3
7.3
6.2
6.0
5.9
5.1
5.0
5.0
5.1
5.7
5.0
5.1
5.5
4.1
7.4
5.0
4.9
4.9
4.9
4,9
4.7
9.1
7,8
7.1
4.9
4.9
8.4
8.4
8.4
8.5
8.5
8.5
7.4
8.4
8.4
8.4
8.2
8.4
8.4
8.5
8.5
8.5
8.5
8.5
8.4
8.4
8.4
8.5
8.4
8.1
8.5
8.5
8.5
8.4
8.4
8.4
8.0
8.1
8.2
8.4
8.4
TOTAL
AMMONIAfMG/L
(NH3 AS N)
0.25
0.19
0.21
0.21
0.29
0.26
10.77
0.21
0.26
0.26
0.21
0.21
0.16
0.11
0.14
0.16
0.14
0.13
4.85
0.09
0.10
0.12
0.10
0.10
0.07
0.07
0.03
0.04
0.11
0.16
0.07
0.21
O.O3
0.03
0.12
UN-IONIZED TIME ADJUSTED
AMMONIA* MG/L UN-IONIZED AMMONIAr
 MG/L (NH3 AS N>
0.00787
0.00618
0.00626
0.00782
0.01095
0.01009
0.07584 STP
0.00631
0.00808
0.00820
0.00479
0.00688
0.00542
0.00436
0.00536
0,00626
0.00532
0.00504
0.15609 STP
0.00275
0.00303
0.00488
0.00300
0.00185
0.00282
0.00282
0.00125
0.00125
0.00326
0.00476
0.00126
0.00397
0.00075
0.00100
0.00376
0.00809
0.00633
O. 00630
0.00786
0.01115
0.01025

0.00633
0.00809
0.00821
0.00487
0.00707
0.00557
0.00449
0.00552
0.00645
0.00548
0.00520

0.00275
0.00303
0.00488
0.00300
0.00185
0.00282
0.00282
0.00125
0.00125
0.00326
0.00476
0.00126
0.00397
0.00075
0.00100
0.00376
                     NOTES  * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER  GREATER  THAN  0.02  MG/L
                           AND PH GREATER  THAN OR EQUAL TO 8.5
                           ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L

                           AND PH LESS THAN 8.5
                           IF TEMPERATURE  LESS THAN 5.0 DEGREES  C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES  C

-------
                      VEEK *12

                     DATE: 11/29/73
ro
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1645
1650
1655
1700
1710
1720
1355
1415
1420
1425
1440
1445
1448
1450
1453
1456
1459
1500
1545
1550
1553
1555
1557
1559
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
TEMPERATURE* PH
DEG.C
2.2
2.3
3.0
2.5
2.3
3.2
15.0
2.5
2.5
2.4
3.9
2.6
2.8
2.6
2.2
2.5
2.5
2.3
4.4
2.5
2.6
2.5
2.4
4.6
2.6
2.6
2.5
2.6
2.5
2.5
5.4
4.2
3.4
2.5
2.5
7.8
7.8
8.1
8.3
7.9
8.0
7.5
7.8
8.1
8.0
8.0
7.9
8.2
7.9
7.8
8.1
8.2
8.1
8.4
7.8
7.8
7.9
7.8
7.9
7.9
7.7
7.9
7.8
7.8
7.9
7.7
8.0
7.8
7.8
7.9
TOTAL
AMMONIA rMG/L
(NH3 AS N)
0.31
0.38
0.29
0.35
0.24
0.28
11.02
0.31
0.30
0.28
0.35
0.28
0.23
0.21
0.25
0.34
O.21
0.26
4.28
0.34
0.25
0.29
0.29
0.20
0.18
0.21
0.24
0.58
0.51
0.30
0.29
0.21
0.10
0.33
0.16
UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L UN-IONIZED AMMONIA.
(NH3 AS N) MG/L 
-------
WEEK #13
DATE* 12/ 4/78
STATION
NUMBER

1A
IB
1C
ID
IE
IF
2
3A
33
3C
4
5A
SB
5C
SD
5E
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME

1325
1327
1330
1335
1340
1345
1410
1413
1415
1417
1419
1420
1422
1424
1426
1427
1429
1430
1515
1517
1519
1520
1522
1524
1526
1528
1530
1531
1532
1533
1535
1537
1538
1539
1540
TEMPERATURE r PH
DEG.C

1.9
1.4
1.9
1.7
1.7
2.4
12.4
1.3
1.3
1.3
4.6
2.2
2.0
1.7
1.5
1.3
1.3
1.3
3.3
1.4
1.4
1.4
1.4
4.2
1.5
1.4
1.4
1.4
1.4
1.4
6.4
5.3
3.9
1.5
1.3

7.5
7.7
8.0
7.7
8.0
8.0
7.4
8.0
7.6
7.9
8.2
7.9
8.0
8.1
8.0
7.8
7.9
7.9
8.2
7.8
7.8
7.8
7.9
8.0
7.9
8.0
7.7
7.9
8.1
7.8
7.7
7.6
7.6
7.7
7.7
TOTAL
AMMDNIA.MG/L

-------
                     DATE:  12/11/79
U)
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
SC
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIME
900
910
920
925
930
940
1345
1420
1425
1430
1437
1440
1444
1448
1450
1454
1456
1500
1550
1552
1554
1556
1600
1551
1605
1608
1610
1612
1615
1618
1620
1623
1625
1630
1635
TEMPERATURE? PH
DEG.C
1.4
0.4
-0.1
-0.1
-0.1
0.3
12.2
0.3
0.1
0.2
0.3
N/A
0.6
0.2
0.9
1.0
0.8
0.5
0.3
0.9
0.0
-0.1
1.2
0.1
N/A
0.7
O.2
0.1
0.0
O.O
0.5
0.2
0.2
0.0
-0.1
8.2
8.2
8.2
8.1
8.0
8.2
7.6
7.7
7.9
7.7
8.0
N/A
7.9
7.7
7.7
7.8
7.8
7.7
8.1
7.7
7.8
7.7
7.8
7.8
N/A
7.8
7.8
7.8
8.1
8.1
7.9
7.8
7.8
7.7
8.0
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA, MO/L AMMONIA, MO/L UN-IONIZED AMMONIA,
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.23
0.12
0.16
0.23
0.18
0.18
17.11
0.18
0.12
0.11
0.27
N/A
0.15
0.18
0.29
0.17
0.15
0.12
8.72
0.14
0.07
0.18
0.29
0.17
N/A
0.07
0.20
0.23
0.14
0.08
0.09
0.16
0.14
0.11
0.11
0.00447
0.00240
0.00320
0.00357
0.00223
0.00352
0.14925 STP
0.00113
0.00113
0.00067
0.00335
INSUFFICIENT DATA
0.00146
0.00113
0.00179
0.00135
0.00116
0.00072
0.135O9 STP
0.00087
0.00051
0.00113
0.00225
0.00135
INSUFFICIENT DATA
0.00058
0.00154
0.00180
0.00217
0.00127
0.00089
0.00129
0.00109
0.00067
0.00132
0.00447
0.00240
0.00320
0.00357
0.00223
0.00352
0.00113
0.00113
0.00067
0.00335

0.00146
0.00113
0.00179
0.00135
0.00116
0.00072

0.00087
0.00051
0.00113
0.00225
0.00135

0.00058
0.00154
0.00180
0.00217
0.00127
0.00089
0.00129
0.001O9
0.00067
0.00132
                     NOTE: *  INDICATES UN-IONIZED  AMMONIA  CONCENTRATION  IN RIVER GREATER THAN 0.02 MG/L
                          AND PH GREATER THAN OR  EQUAL  TO 8.5

                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND PH LESS THAN 8.5
                          IF TEMPERATURE LESS THAN 5.0  DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                      WEEK *15

                      DATE: 12/18/73
(o
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
5G
6
7A
7B
7C
7D
e
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIME
1330
1335
1340
1350
1400
1420
1320
1445
1448
1450
1455
1500
1502
1505
1507
1508
1509
1510
1610
1613
1615
1617
1619
1620
1622
1625
1629
1630
1632
1635
1637
1640
1643
1644
1645
TEMPERATURE , PH
DEG.C
0.8
0.8
0.3
N/A
0.8
3.0
12.5
O.4
0.4
0.3
0.9
1.0
0.9
0.7
0.9
0.8
0.8
0.6
1.2
0.4
0.9
N/A
1.6
O.4
N/A
N/A
0.3
0.3
0.1
0.1
5.4
2.4
1.3
0.3
0.2
7.4
7.4
7.2
N/A
7.4
7.2
6.8
7.4
7.3
7.4
7.5
7.3
7.4
7.4
7.3
7,3
7.3
7.3
7.1
7,3
7.3
N/A
7.3
7.3
N/A
N/A
7.3
7,3
7.3
7.4
7.4
7.5
7.5
7.3
7.4
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA. MG/L AMMONIA* MG/L UN-IONIZED AMMONIA,
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.35
0.21
0.24
N/A
0.25
0.21
18.59
0.21
0.21
0.25
0.41
0.24
0.30
0.29
0.26
0.30
0.33
0.23
10.77
0.30
0.30
N/A
0.33
0.39
N/A
N/A
0.21
0.21
0.31
0.25
0.35
0.33
0.25
0.25
0.21
0.00111
0.00067
0.00047
INSUFFICIENT DATA
0 . 00080
0.00042
0.02650 STP
0.00064
0.00053
0.00080
0.00162
0.00059
0.00095
0.00090
0.00065
0.00076
0.00082
0.00057
0.01693 STP
0.00074
0.00074
INSUFFICIENT DATA
0.00082
0.00098
INSUFFICIENT DATA
INSUFFICIENT DATA
0.00051
0.00053
0.00078
0.00077
0.00114
0.00130
O.O0097
0.00061
0.00064
0.00111
0.00067
0.00047

0.00080
0.00042

0.00064
0.00053
0.00080
0.00162
0.00059
O. 00095
0.00090
0.00065
0.00076
0.00082
0.00057

0.00074
0.00074

0.00082
0.00098


0.00051
0.00053
0.00078
0.00077
0.00114
0.00130
0.00097
0.00061
0.00064
                      NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                            AND PH GREATER THAN OR EQUAL TO 8.5
                            ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIMER GREATER THAN 0.02 MG/L
                            AND PH LESS THAN 8.5
                            IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
HEEK *16

DATE:  12/27/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
SC
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
90
9E
9F
10A
10B
IOC
10D
10E
TIME
1315
1320
1325
1330
1335
1340
1310
1400
1405
1410
1418
1428
1432
1436
1439
1442
1443
1445
1510
1517
1519
1521
1523
1527
1532
1534
1536
1538
1539
1540
1544
1546
1548
1549
1550
TEMPERATURE r PH
DEQ.C
0.3
0.7
N/A
0.5
0.1
0.8
10.3
0.4
0.3
0.1
0.9
0.0
0.0
-0.1
-0.1
-0.2
0.0
0.2
0.3
-0.1
-0.5
N/A
0.2
0.9
0.9
0.0
0.0
0.0
-0.1
-0.1
2.4
1.5
0.2
0.0
-0.2
8.3
8.0
N/A
8.3
8.3
8.O
7.3
8.6
8.7
8.7
8.6
8.7
8.5
8.6
8.7
8.7
8.2
8.6
8.1
8.4
8.4
N/A
8.3
8.3
8.5
8.5
8.4
8.4
8.4
8.5
8.3
8.3
8.2
8.2
8.2
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIAfMO/L AMMONIAf MB/L UN-IONIZED AMMONIAf
(NH3 AS N) (NH3 AS N) HO/L (NH3 AS N)
0.25
0.12
N/A
0.10
0.10
0.25
15.71
0.17
0.14
0.10
0.22
0.10
0.10
0.10
0.12
0.16
0.08
0.11
10.77
0.19
0.16
N/A
0.16
0.22
0.19
O.22
0.17
0.20
0.12
0.07
0.17
0.27
0.10
0.08
0.16
0.00621
0.00152
INSUFFICIENT DATA
0.00240
0.00240
0.00315
0.05956 STP
0.00819
0.00824
0.00582
0.01053
0.00582
0.00375
0.00468
0.00727
0.00921
0.00160
0.00507
0.16695 STP
0.00576
0.00476
INSUFFICIENT DATA
0.00380
0.00540
0.00719
0.00845
0.00526
0.00601
0.00376
0.00250
0.00420
0.00661
0.00192
0.00160
0.00304
0.00621
0.00152

0.00240
0.00240
0.00315

0.00819
0.00824
0.00582
0.01053
0.00582
0.00375
0.00468
0.00727
0.00921
0.00160
0.00507

0.00576
0.00476

0.00380
0.00540
0.00719
0.00845
0.00526
0.00601
0.00376
0.00250
0.00420
0.00661
0.00192
0.00160
0.00304
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5                              ».„„-,„„„
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5                                                                ___„ _
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES C

-------
tO
UEEK #17
DATE: i/ 1/79
STATION
NUMBER

1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SD
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
90
9E
9F
10A
10B
IOC
10D
10E
TIME

1340
1345
1350
1355
1400
1410
1330
1450
1452
1455
1500
1510
1520
1525
1529
1534
1537
1540
1600
1605
1609
1613
1617
1622
1626
1630
1635
1639
1643
1648
1652
1656
1700
1705
1710
TEMPERATURE. PH
DE6.C

0.7
O.O
0.1
O.O
-0.1
0.0
7.4
0.0
0.0
-O.I
-0.2
-0.1
-0.1
-0.7
-0.1
-0.4
-O.2
-0.1
-0.1
-0.2
0.0
N/A
0.1
N/A
0.0
O.O
0.0
-0.2
-0.2
-0.2
-0.1
-0.1
-0.1
-0.2
-0.2

7.8
8.0
7.9
7.6
7.7
7.8
7.3
7.5
7.7
7.7
7.7
7.7
7.7
7.9
7.9
7.7
7.9
8.0
7.7
7.7
7.7
N/A
7.7
N/A
7.7
8.0
7.7
7.6
7.9
7.7
7.7
7.8
8.0
7,9
7.9
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA.MG/L AMMONIA. M6/L UN-IONIZED AMMONIA*

0.12
0.12
0.27
0.44
0.39
0.11
17.43
0.08
0.12
0.12
0.12
0.07
0.11
0.12
0.16
0.07
0.11
0.16
11.35
0.18
0.16
N/A
0.09
N/A
0.05
0.03
0.01
0.02
0.08
0.17
0.22
0.05
0.11
0.12
0.08
(NH3 AS N) MG/L (NH3 AS N)
0.00097
0.00152
0.00267
0.00220
0.00241
0.00084
0.05261 STP
0.00032
0.00077
0.00072
0.00072
0.00041
0.00067
0.00121
0.00162
0.00046
0.00105
0.00203
0.07067 STP
0.00113
0.00102
INSUFFICIENT DATA
0.00056
INSUFFICIENT DATA
0.00031
0.00041
0.00005
0.00012
0.00081
0.00108
0.00138
O.OOO39
0.00132
0.00121
0.00081
0.00097
0.00152
0,00267
0.00220
0.00241
0.00084

0.00032
0.00077
0.00072
0.00072
0.00041
0,00067
0.00121
0.00162
0.00046
0.00105
0.00203

0.00113
0.00102

0.00056

0.00031
0.00041
0.00005
0.00012
0.00081
0.00108
0.00138
0.00039
0.00132
0.00121
0.00081
                      NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                            AND PH GREATER THAN OR EQUAL TO 8.5
                            ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                            AND PH LESS THAN 8.5
                            IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
 UEEK


DATE:  i/ 7/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
36
3C
4
5A
SB
SC
5D
5E
5F
56
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10ft
10B
IOC
10D
10E
TIME
1355
1400
1405
1410
1420
1425
1345
1445
1450
1455
1500
1502
1504
1506
1508
1510
1515
1520
1555
1600
1603
1606
1610
1556
1615
1617
1618
1620
1623
1625
1633
1637
1641
1643
1645
TEMPERATURE, PH
DE6.C
2.0
1.5
0.5
0.5
O,0
1.0
8.0
O.O
0*0
0.0
0.0
0.0
0.0
O.O
0.0
0.0
0.0
0.0
0.0
O.O
O.O
N/A
0.0
N/A
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
8.2
8.0
8.0
8.1
8.2
7.8
7.4
8.3
8.0
8.1
8.1
8.2
8.2
8.1
8.2
8.0
8.1
8.2
7.9
8.1
8.1
N/A
8.2
N/A
8.3
8.4
8.3
8.1
8.4
8.3
8.3
8.3
8.1
8.2
8.2
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA. NG/L AMMONIAr MG/L UN-IONIZED AMMONIA.
(NH3 AS HI (NH3 AS N> MG/L 
0.90
0.36
0.63
0.26
0.48
0,42
17.11
0.19
0.21
0.42
0.39
0.39
0.39
0.39
0.25
0.14
O.22
0.29
11.43
0.49
0.49
N/A
0.58
N/A
0.36
0.53
0.44
0.57
0.11
0.67
0.25
0.53
0.75
0.49
0.4?
0.01758
O.OO447
0.00772
0.00408
0.00927
0.00328
0.0&B09 BTP
0.00460
0,00254
0,00650
0.00599
0.00751
O, 00751
O.OO599
0.00495
O. 00173
0.00344
0.00559
0.11241 STP
0.00765
0.00765
INSUFFICIENT DATA
0.01135
INSUFFICIENT DATA
0.00881
0.01603
O. 01061
0,00879
O. 00326
0. 01621
0.00621
0.01281
O. 01160
0.00943
0.00943
0.01758
0.00447
0.00772
0.00408
0,00927
0.00328

0.00460
0.00254
0.00650
0.00599
0.00751
0.00751
0.00599
0,00495
0.00173
0.00344
0.00559

0.00765
0.00765

0.01135

0.00881
0.01603
0.01O81
0.00879
0.00326
0.01621
0.00621
0.01281
0.01160
0.00943
0.00943
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MO/L
      AND PH GREATER THAN OR EOUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED ftT 5.0 DEGREES C

-------
                     WEEK  #19


                     DATE:   1/17/79
oo
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
3D
5E
5F
SG
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1350
13S5
140O
1405
1410
1415
1340
1435
1440
1445
1450
1500
1505
1510
1515
1520
1525
1530
1615
1620
1625
1630
1635
1640
1645
1650
1655
1700
1703
1705
1707
1710
1715
1718
1720
TEMPERATURE, PH
DEG.C
1.9
1.5
1.4
1.5
1.3
O.9
9.9
0.8
1.0
1.1
3.7
1.3
1.1
1.0
1.0
1.0
0.8
1.1
1.5
0.8
0.7
N/A
1.1
3.3
1.3
0.8
0.7
0.7
0.7
0.7
3.1
1.4
1.0
0.8
0.8
7.9
7.8
7.9
7.8
7.7
7.8
7.3
7.9
7.8
7.7
7.5
7.8
7.6
7.6
7.5
7.9
7.7
7.5
7.4
7.9
7.9
N/A
7.4
7.9
7.9
7.9
7.9
7.9
7.9
7.9
7.7
7.9
7.9
7.9
7.9
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA, MO/L AMMONIA, M6/L UN-IONIZED AMMONIA,
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.12
0.14
0.07
O.O6
0.07
0.07
17.43
0.16
0.11
0.11
0.11
0.11
0.11
0.13
0.13
0.12
0.14
0.11
18.91
0.13
0.11
N/A
0.11
0.28
0.15
0.14
0.13
0.12
0.12
0.12
0.11
0.11
0.15
0.11
0.12
0.00113
0.00109
0.00065
0.00045
0.00041
0.00051
0.064O7 STP
0.00162
0.00084
0.00067
0.00042
0.00084
0.00053
0.00065
0.00052
0.00113
0.00087
0.00042
0.05922 STP
0.00129
0.00105
INSUFFICIENT DATA
0.00033
0.00275
0.00146
0.00137
0.00129
0.00113
0.00113
0.00113
0.00067
0.00105
0.00146
0.00105
0.00113
0.00113
0.00109
0.00065
0.00045
0.00041
0.00051

0.00162
0.00084
0.00067
0,00042
0.00084
0.00053
0.00065
0.00052
0.00113
0.00087
0.00042

0.00129
0.00105

0.00033
0.00275
0.00146
0.00137
0.00129
0.00113
0.00113
0.00113
0.00067
0.00105
0.00146
0.00105
0.00113
                    NOTE: *  INDICATES UN-IONIZED AMMONIA CONCENTRATION  IN RIVER GREATER THAN 0.02 MG/L
                          AND PH GREATER THAN OR EQUAL TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION  IN RIVER GREATER THAN 0.02 MG/L
                          AND PH LESS THAN 8.5
                          IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                      WEEK  *20

                      DATEJ  1/22/79
H
N>
VO
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
5G
6
7A
7B
7C
7B
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
1OD
10E
TIME
1310
1315
1320
1325
1330
1345
1300
1445
1450
1455
150O
1503
1505
1508
1510
1512
1515
1520
1540
1545
1550
1555
160O
1605
1610
1615
1620
1625
1630
1632
1634
1636
1637
1639
1640
TEMPERATURE f PH
DEG.C
1.8
1.3
1.0
1.0
1.8
0.4
9.6
0.8
0.7
0.6
2.0
1.1
1.1
1.0
0.4
0.4
0.9
0.6
0.6
0.8
0.9
0.9
0.4
1.7
0.4
0.6
0.7
0.7
0.6
0.6
0.7
1.3
0.9
0.7
0.5
8.9
9.0
9.2
9.0
9.3
8.7
8.5
8.6
8.5
8.4
8.4
8.6
8.3
8.3
8.5
8.2
8.5
8.5
8.3
9.3
9.2
9.2
9.1
8.8
8.7
9.2
9.2
9,3
9.2
9.2
9.0
9.3
8.8
9.3
9.1
TOTAL
AMMONIA. MG/L
(NH3 AS N)
0
0
0
0
0
0
16
0
0
0
0
0
0
0
0
0
0
0
14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.16
«
*
•
4
4
*
«
«
«
*
«
*
4
4
«
*
*
*
*
«
*
*
*
*
•
*
*
*
•
t
*
*
*
•
O7
01
03
01
01
69
07
05
05
08
12
05
06
OS
09
02
11
56
03
03
01
02
14
05
11
15
12
21
20
11
12
13
11
11
UN-IONIZED TIME ADJUSTED
AMMONIAr MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L 
-------
                      WEEK #21


                      DATE:  1/27/79
u>
o
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIHE TEMPERATURE » PH
DE6.C
1315
1320
1325
1330
1335
1340
1300
1355
1357
1400
1405
1410
1420
1430
1440
1450
1500
1505
1530
1535
1540
1545
1550
1555
1600
1603
1606
1609
1612
1614
1615
1616
1618
1619
1620
1.5
0.9
0.1
0.1
0.1
0.1
7.6
0.6
0.5
0.5
0.9
0.6
O.6
0.6
0.4
0.3
0.3
0.6
0.7
0.3
0.2
0.1
0.2
0.1
0.0
0.2
0.2
0.2
0.3
0.4
0.9
O.2
0.2
0.3
0.1
7.7
7.9
7.6
7.6
7.5
7.8
7.1
7.5
7.5
7.2
7.2
7.5
7.2
7.5
7,4
7.5
7.1
7.5
7.2
7.7
7.6
7.6
7.6
7.6
7.7
7.8
7.7
7.7
7.7
7.7
7.7
7.7
7.7
7.7
7.6
TOTAL
AMMONIAfMB/L
(NH3 AS N)
0.34
O.14
0.17
0.16
0.18
0.39
10.61
0.17
0.07
0.07
O.14
0.12
0.10
0.11
0.05
0.20
0.16
0.16
7.84
0.16
0.12
0.12
0.21
0.16
O.14
0.21
0.16
0.16
0.23
0.09
0.21
0.12
0.05
0.14
0.12
UN-IONIZED TIME ADJUSTED
AMMONIA* MO/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L 
-------
WEEK *22
BATE: 2/ 5/79
STATION
NUMBER
TIME
TEMPERATURE , PH
DEG.C
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIAf MG/L UN-IONIZED AMMONIA*
(NH3 AS N) (NH3 AS N> MG/L 
-------
                WEEK #23


                DATE:   2/15/7?
                                                       WINTER INTENSIVE SURVEY
to
STATION
NUMBER
1A
IB
1C
ID
IE
IF
3A
3B
3C
4
5A
SB
5C
SO
SE
5F
50
3A
3B
3C
4
5A
SB
5C
SD
5E
5F
SO
3A
3B
3C
4
5A
SB
5C
TIME
810
815
820
825
830
84O
920
925
930
935
940
942
944
946
950
955
1000
1035
1040
1045
1050
1053
1055
1100
1105
1107
1110
1115
1205
1210
1215
1220
1223
1225
1230
TEMPERATURE
DEG.C
0.0
0.2
2.3
2.4
2.3
2.1
1.3
1.4
1.4
1.2
2.1
1.6
2.1
1.3
1.3
1.4
1.5
1.8
2.2
2.3
1.6
3.5
3.8
3.1
2.9
3.2
2.8
2.5
2.8
2.9
3.4
4.0
4.3
4.1
4.1
•f PH
(
6.8
7.1
7.1
7.2
7.2
7.3
7.4
7.4
7.3
7.1
7.3
7.4
7.3
7.4
7.5
7.5
7.5
7.4
7.7
7.7
7.7
7.8
7.9
7.9
7.8
7.9
7.9
7.9
7.6
7.7
7.8
7.8
7.9
8.0
7.9
TOTAL
AMMONIA* MG/L
(NH3 AS N)
0.12
0.02
0.07
0.07
0.05
0.16
0.11
0.12
0.12
O.34
0.20
O.18
0.26
0.12
0.14
0.09
0.14
0.09
0,07
0.07
0.31
0.32
0.21
0.05
0.36
0.14
0.12
0.14
0.16
0.31
0.17
0.14
0.31
0.14
0.21
UN-IONIZED
AMMONIA* MO/L

-------
                  WEEK #23 (continued)
                  DATE:  2/15/79
u>
Ul
STATION
NUMBER
5D
5E
5F
50
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
3A
3B
3C
4
5A
SB
5C
50
5E
5F
50
3A
3B
3C
4
5A
SB
5C
5D
TIME
1235
1237
1240
1242
1305
1335
1340
1345
1350
1351
1353
1355
1356
1358
1359
1400
1500
15O3
1505
1507
1510
1515
1517
1520
1523
1525
1530
1640
1643
1645
1648
1650
16S2
1654
1655
TEMPERATURE r PH
DEG.C
3.7
3.8
3.9
3.2
8.2
3.3
3.5
3.6
4.3
4.3
4.1
3.9
3.4
3.3
3.7
3.4
3.B
3.8
4.0
5.7
4.3
4.1
3.9
3.4
3.1
3.5
3.0
3.8
3.8
3.8
4.6
4.2
4.0
3.7
3.5
7.9
7.9
8.0
8.0
7.4
8.0
8.0
8.0
7.9
8.0
8.1
8.1
8.0
8.0
7.9
8.0
8.2
8.4
8.3
8.3
8.3
8.3
8.2
8.2
8.3
8.2
8.4
8.1
8.3
8.2
8.2
8.3
8.3
8.3
8.3
TOTAL
AMMONIAtMG/L
(NH3 AS N)
0.14
0.05
0.13
0.12
8.06
0.12
0.14
0.12
0.27
0.23
0.21
0.18
0.14
0.14
0.14
0.20
0.14
0.14
0.14
0.36
0.12
0.18
0.18
0.18
0.05
0.14
0.02
0.02
0.25
0.20
0.26
0.20
0.26
0.21
0.21
UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L 
-------
                    WEEK *23 (continued)


                    DATEt  2/15/79
U>
STATION
NUMBER
5E
5F
SO
6
7A
7B
7C
70
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
7A
7B
7C
7D
TIME
1658
1659
1700
830
833
835
840
845
850
855
900
905
910
915
917
922
924
926
928
930
1015
1017
1020
1023
1025
1030
1035
104O
1045
1050
1055
1150
1154
1156
1200
TEMPERATURE t PH
DE6.C
3.5
3.5
3.7
1.4
1.5
1.6
1.5
1.7
0.3
1.2
1.5
1.4
1.5
1.5
1.5
2.4
2.2
1.9
1.5
1.3
1.8
1.8
1.7
2.1
2.4
1.8
1.9
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.6
8.3
8.2
8.3
7.4
7.6
7.6
7.6
7.7
7.9
7.8
7.7
7.7
7.7
7.7
7.7
7.8
7.8
7.7
7.7
7.8
7.7
7.8
7.9
8.0
8.0
7.8
7.9
7.9
8.0
7.9
7.9
7.7
7.6
7.7
7.8
TOTAL
AMMONIA, MG/L

0.18
0.18
0.18
13.49
0.16
0.16
0.18
0.20
0.38
0.16
0.25
0.20
0.2O
0.21
0.22
0.34
0.22
0.22
0.21
0.16
0.22
0.21
0.21
0.26
0.44
0.21
0.25
0.23
0.21
0.22
0.23
0.23
0.16
0.16
0.14
UN-IONIZED TIME ADJUSTED
AMMONIA, MQ/L UN-IONIZED AMMONIA,
(NH3 AS N) MG/L (NH3 AS N>
0.00440
0.00352
0.00440
0.04223 STP
0.00081
0.00081
0.0009O
0.00123
0.00372
0.00129
0.00154
0.00123
0.00123
0.00128
O.O0138
0.00264
0.00174
0.00138
0.00128
0.00129
0.00138
0.00161
0.00202
0.00325
0.00548
0.00161
0.00243
0.00226
0.00254
0.00218
0.00226
0.00143
0.00081
0.00102
0.00109
0.00440
0.00352
0.00440

0.00081
0 . 00081
0.00090
0.00123
0.00372
0.00129
0.00154
0.00123
0.00123
0.00128
0.00138
0.00264
0.00174
0.00138
0.00128
0.00129
0.00138
0.00161
0.00202
0.00325
0.00548
0.00161
0.00243
0.00226
0.00254
0.00218
0.00226
0.00143
0.00081
0.00102
0.00109
                   NOTE:  *  INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND  PH GREATER THAN OR EQUAL TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND  PH LESS THAN 8.5
                          IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                    WEEK  423  (continued)

                    DATE:  2/15/79
to
Cn
STATION
NUMBER
8
9A
9B
9C
9D
9E
9F
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
7A
7B
7C
7D
a
9A
9B
9C
9D
9E
9F
TIME
1205
1210
1215
1220
1224
1228
123O
1340
1343
1345
1347
1350
1352
1356
140O
1403
1407
1410
1515
1517
1520
1523
1525
1527
1530
1535
1540
1545
1550
1655
1657
1700
1702
1705
1707
1709
1712
1713
1714
1715
TEMPERATURE*
DEG.C
I.T
2.4
2.5
2.5
2.5
2.5
2.5
3.4
3.4
3.4
3.9
4.2
3.7
3.2
3.1
3.0
3.3
3.3
3.7
3.6
3.6
3.6
3.7
3.6
3.8
3.7
3.8
3.7
3.6
3.5
3.5
3.6
3.2
2.8
3.5
3.6
3.6
3.6
3.5
3.5
PH
7.9
7.7
7.7
7.8
7.7
7.6
7.6
7.8
7.8
7.9
7.9
8.2
8.0
8.0
8.0
8.0
8.0
8.1
8.0
7.9
7.9
8.0
8.0
8.0
8.0
8.0
7.9
7.9
7.9
8.0
8.0
8.0
8.0
8.0
8.1
8.1
8.0
8.0
8.0
7.9
TOTAL
AMMONIAfMG/L

-------
                      WEEK *24


                      DATE:  2/24/79
to
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
50
SE
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
7D
9E
9F
10A
10B
IOC
10D
10E
TIME
1407
1400
1395
1382
1360
1345
1330
1440
1442
1445
1448
1500
1501
1502
1504
1506
1508
1510
1540
1545
1547
1548
1550
1541
1555
1558
1600
1550
1604
1606
1610
1611
1612
1613
1615
TEMPERATURE. PH
DEG.C
3.3
2.7
4.2
4.6
4.9
4.7
10.5
3.5
3.5
3.6
5.0
3.8
3.7
3.1
3.4
3.3
3.4
3.5
2.3
3.7
3.8
3.7
3.2
3.2
5.6
3.6
3.8
3.2
3.7
3.7
5.1
3.9
3.3
3.5
3.5
8.1
7.9
8.2
8.4
8.2
8.1
7.4
8.2
8.1
8.2
8.2
8.3
8.1
8.3
8.1
8.2
8.2
8.2
7.3
8.3
8.4
8.2
8.3
8.3
8.3
8.3
8.3
8.3
8.1
8.2
8.2
8.3
8.3
8.3
8.3
TOTAL
AMMONIArMG/L
(NH3 AS N)
0.16
0.09
0.05
0.05
0.11
0.21
7.89
0.11
0.09
0.05
0.09
0.31
0.27
0.17
0.21
0.15
0.16
0.06
5.44
0.15
0.16
0.08
0.07
0.50
0.16
0.11
0.09
0.07
0.07
0.05
0.11
0.11
0.16
0.17
0.21
UN-IONIZED TIME ADJUSTED
AMMONIA* MB/L UN-IONIZED AMMONIAr
(NH3 AS N) MG/L (NH3 AS N)
0.00255
0.00089
0.00096
0.00150
0.00208
0.00331
0.03B20 STP
0.00208
0.00140
0.00096
0.00176
0.00761
0.00421
0.00420
0.00331
0.00288
0.00320
0.00112
0.01355 STP
0.00360
0.00501
0.00160
0.00160
0.01221
0.00420
0.00260
0.00220
0.00160
0.00102
0.00096
0.00209
0.00260
0.00400
0.00420
0.00520
0.00255
0.00089
0.00096
0.0015O
0.00212
0.00335

0.00208
0.00140
0.00096
0.00179
0.00761
0.00421
0.00420
0.00331
0.00288
0.0032O
0.00112

0.00360
0.00501
0.00160
0.00160
0.01221
0.00420
0.00260
0.00220
0.00160
0.00102
0.00096
0.00209
0.00260
0.00400
0.00420
0.00520
                      NOTE:  * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                            AND PH GREATER THAN OR EQUAL TO 8.5
                            ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                            AND PH LESS THAN 8.5
                            IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT  5.0 DEGREES  C

-------
U)
WEEK *25
DATE: 3/ 1/79
STATION
NUMBER

1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SD
5E
5F
5G
6
7A
7B
7C
7D
8
?A
9B
9C
9D
9E
9F
tOA
10B
IOC
1OO
IDE
TIME

1220
1225
1230
1234
1237
1240
1215
1255
1257
1259
1300
1305
1308
1310
1315
1320
1330
1335
1355
1400
1402
1404
1406
1409
1410
1412
1414
1414
1417
1418
1420
1424
1427
1430
1435
TEMPERATUREt PH
DEG.C

2.3
3.3
4.7
5.0
5.0
5.1
10.3
3.3
3.4
3.5
3.7
3.2
3.8
3.9
3.9
3.2
3.1
3.1
2.3
3.8
3.8
4.0
4.4
5.2
3.B
3.8
3.8
3.9
3.8
3.7
5.2
4*5
4.4
3.8
3.7

8.5
8.4
8.4
8.4
8.4
8.5
7.8
8.4
8.5
8.1
8.4
8.5
8.4
8.4
8.4
8.4
8*3
8.4
7.5
8.2
8.3
8.4
8.3
8*3
8.3
8.2
8.2
8.3
8.2
8.3
8.2
8.2
8.3
8.1
8.3
TOTAL
AMMONIA rMG/L
(NH3 AS N)
0.09
0.16
0.05
0.12
0.01
0.11
7.16
0.12
0.18
0.09
0.16
0.14
0.07
0.12
0.16
0.11
0.14
0.08
8.88
0.05
0.01
0.11
0.12
0.99
0.06
0.03
0.12
0.11
0.07
0.07
0.12
0.09
0.11
0.05
0.11
UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L UN-IONIZED ANMONIAr
(NH3 AS N) MG/L (NH3 AS N)
0.00344
0.00501
0.00150
0.00351
0.00025
0.0041O
0.08518 STP
0.00376
0.00688
0.00140
0.00501
0.00532
0.00200
0.00376
0.00501
0.00326
0.00340
0.00250
0.03498 STP
0.00096
0.00020
0.00326
0.00280
0.02440 **
0.00140
0.00064
0.00224
0.00260
0.00128
0.00160
0.00244
0.00176
0.00260
O.O0076
0.00260
0.00344
0.00501
0.00158
0.00378
O. 00027
0.00440

0.00376
0.00688
0.00140
0.00518
O.OOS32
0.00200
0,00376
0.00501
0.00326
0.00340
0.00250

O.OOO96
0.00020
0.00326
0.00280
0.02483 **
0.00140
0.00064
0.00224
0.00260
0.00128
0.00160
O. 00251
O. 00176
0,00260
0.00076
0.00260
                     NOTE: * INDICATES UN-IONIZED  AMMONIA  CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                           AND PH GREATER THAN OR  EOUAL  TO 8.5

                           ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0,02 MG/L

                           AND PH LESS THAN 8.5                                                               -,..-,-,-,. r-
                           IF TEMPERATURE LESS THAN 5.0  DEGREES  C  THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                   WEEK #26

                   DATE:  3/ 8/79
oo
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
50
5E
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIME
1045
1048
1052
1055
1100
1105
1035
820
822
825
835
845
847
850
855
858
900
905
925
927
929
930
932
937
940
942
945
947
948
950
955
955
1000
1005
1010
TEMPERATURE F PH
DE6.C
4.0
4.2
N/A
6. A
6.7
6.5
12.3
3.5
3.5
3.8
2.3
3.4
3.5
3.5
3.7
3.7
3.5
3.6
3.0
4.0
4.1
4.3
4.2
2.1
4.4
4.1
4.1
4.3
4.2
4.1
3.7
4.4
4.4
4.1
4.1
8.1
8.1
N/A
8.0
8.1
8.1
7.3
8.1
8.1
8.0
7.8
8.1
8.0
8.0
8.1
8.0
8.1
8.1
7.4
7.9
7.9
8.0
8.0
8.0
8.0
8.0
7.9
8.1
8.1
7.9
7.9
8.0
8.0
7.9
8.0
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L AMMONIA. MG/L UN-IONIZED AMMONIA,
(NH3 AS N> (NH3 AS N) MG/L (NH3 AS N)
0.39
0.36
N/A
0.24
0.21
0.17
6.91
0.21
0.35
0.30
0.81
0.22
0.51
0.37
0.30
0.24
0.28
0.35
0.39
0.22
0.21
0.35
0.16
0.58
0.36
0.22
0.29
0.43
0.11
0.21
0.08
0.23
0.21
0.35
0.14
0.00612
0.00561
INSUFFICIENT DATA
0.00335
0.00365
0.00301
0.03057 STP
0.00331
0.00535
0.00366
0.00637
0.00344
0.00630
0.00457
0.00459
0.00295
0.00433
0.00535
0.00121 STP
0.00218
0.00202
0.00427
0.00203
0.00711
0.00447
0.00274
0.00283
0.00663
0.00166
0.00210
0.00081
0.00284
0.00254
0.00340
0.00173
0.00648
0.00602

0.00381
0.00414
0.00341

0.00365
0.00590
0.00412
0,00793
0.00384
0.00707
0.00512
0.00519
0.00332
0.00480
0.00594

0.00234
0.00218
O.O0468
0.00221
0.00711
0.00501
0.00300
0.00309
0.00735
0.00182
0.00229
0.00085
0.00317
0.00282
0.00368
0.00186
                    NOTES  *  INDICATES  UN-IONIZED  AMMONIA CONCENTRATION  IN  RIVER  GREATER  THAN  0.02  MG/L
                          AND  PH  GREATER  THAN  OR  EQUAL  TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND  PH  LESS  THAN  8.5
                          IF TEMPERATURE  LESS  THAN 5.0  DEGREES  C  THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES  C

-------
U)
VO
U£EK 427
DATEt 3/ 8/79
STATION
NUMBER
TIME
TEMPERATURE t PH
DEG.C
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA. MG/L AMMONIA* MG/L UN-IONIZED AMMONIA.
(NH3 AS N> (NH3 AS N> MG/L (NH3 AS N)
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SO
SE
5F
SO
6
7A
7B
7C
70
8
?A
9B
9C
90
9E
9F
10A
10B
IOC
100
1OE
1430
1433
1436
1440
1447
1455
1345
1S05
1S08
1510
1515
1520
1525
1528
1530
1535
1540
1545
1600
1605
1607
1610
1615
1618
1620
1623
1626
1628
1630
1632
1634
1636
1637
1638
1640
8.3
8.2
N/A
7.2
7.1
8.1
12.3
7.2
7.2
7.2
9.9
7.7
7.5
7.5
8.3
8.1
8.0
8.0
6.4
7.1
7.0
7.2
7.2
7.0
7.0
7.1
7.3
7.1
7.1
7.0
8.5
7.7
7.5
7.0
7.0
8.1
8.1
N/A
8.1
8.1
8.0
7.2
8.0
B.O
B.O
8.1
8.1
8.0
8.1
8.0
8.0
8.1
8.1
7,1
7.9
8.0
8.0
8.0
7.9
8.1
8.0
7.9
7.9
7.7
7.3
7.5
8.0
8.0
7.4
7.8
0.28
0.35
N/A
0.29
0.25
0.24
23.03
0.60
0.60
0.35
0.33
0.30
0.33
0.36
0.21
0.30
0.18
0.21
11.51
O.29
0.23
0.13
0.21
0.51
0.21
0.23
0.29
0.24
0.21
0.21
0.46
0.24
0.29
0.33
O.21
0.00562
O. 00689
INSUFFICIENT DATA
0.00531
0.00452
0.00376
0.08103 STP
0.00883
0.00883
0.00508
0.00748
0 . OO568
0.00495
0.00683
0.00343
0.00467
0.00355
0.00420
0.02026 STP
0.00335
O.OO333
0.00194
0.00302
0.00588
0.00373
0.00336
0.00340
0.00277
0.00158
0.00062
0.00240
0.00365
0.00433
0.00121
0.00189
0.00568
0.00695

0.00534
0.00452
0.00375

0.00876
0.00883
0.00508
0.00748
0.00599
0.00522
0.00720
O.OO361
0.00493
0.00374
0.00443

0.00335
0.00333
0.00194
0.00302
0.00588
0.00373
0.00336
0.00340
0.00277
0.00158
0.00062
0.00240
0.00365
0.00433
0.00121
0.00189
                    NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L

                          AND PH GREATER THAN OR EQUAL TO 8,5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L

                          AND PH LESS THAN 8.5                                                              nrf,n^rc-  r~
                          IF TEMPERATURE LESS THAN 5,0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES  C

-------
 WEEK  #28

 DATE:  3/19/79
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
A
5A
SB
5C
5D
5E
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
90
9E
9F
10A
10B
IOC
10D
10E
TIME
1420
1425
1428
1435
1440
1445
1335
1500
1505
1508
1510
1515
1518
1520
1524
1528
1530
1535
1605
1608
1610
1615
1617
1620
1622
1625
1627
1630
1632
1635
1637
1640
1643
1646
1650
TEMPER ATUREf PH
DEG.C
8.2
8.2
7.4
7.4
7.4
7.9
9.4
7.4
7.5
8.3
9.0
7.7
7.7
7.7
7.8
7.7
7.7
7.8
8.4
7.4
7.4
7.8
7.9
8.1
7.7
7.7
7.6
7.6
7.5
7.5
8.3
7.9
7.8
7.4
7.5
7.9
7.8
7.8
7.9
7.8
7.8
7.2
7.9
7.9
8.0
8.0
7.9
8.0
7.9
8.0
7.9
8.0
7.9
7.4
8.0
8.0
8.0
8.0
8.1
8.0
8.0
7.9
7.9
7.5
7.9
7.8
7.9
8.0
7.9
7.9
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIA. MG/L UN-IONIZED AMMONIA,
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.30
0.39
0.26
0.26
0.31
0.41
23.44
0.23
0.13
0.25
0.12
0.10
0.35
0.21
0.25
0.27
0.22
0.25
13.82
0.16
0.16
0.69
0.22
0.22
0.18
0.21
N/A
0.16
0.16
0.21
0.06
0.06
0.06
0.06
0.11
0.00375
0.00399
0.00249
0.00313
0.00296
0.00405
0.06584 STP
0.00274
0.00158
0.00409
0.00209
0.00120
0.00528
0.00251
0.00380
0.00331
0.00340
0.00303
0.05677 STP
0.00246
0.00246
0.01065
0.00345
0.00439
0.00277
0.00327
INSUFFICIENT DATA
0.00199
0.00079
0.00257
0.00059
0.00071
0.00089
0.00069
0.00128
0.00382
0.00404
0.00253
0.00316
0.00298
0.00407

0.00273
0.00157
0.00409
0.00209
0.00124
O. 00547
0.00264
0.00401
0.00349
0.00358
0.00320

0.00246
0.00246
0.01065
0.00345
0.00439
0.00277
0.00327

0.00199
0.00079
0.00257
0.00059
0,00071
0.00089
0.00069
0.00128
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8,5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES

-------
 UEEK *29


DATE:  3/24/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SO
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIME
1110
1115
1120
1130
1140
1150
1100
820
825
830
833
835
840
845
850
855
900
905
945
950
955
1000
1005
1007
1010
1013
1015
1020
1025
1027
1030
1033
1035
1038
1040
TEMPERATURE. PH
DEG.C
11.0
10.2
7.8
8.2
7.9
7.8
11.7
7.5
7.4
7.4
7.5
7.5
7.2
7.4
7.3
7.3
7.3
7.2
11.7
7.7
7.8
8.0
8.0
7.O
8.2
8.0
7.9
7.8
7.8
8.0
8.4
8.4
8.3
7.9
7.9
7.8
7.8
7.7
7.8
7.7
7.7
6.8
7.8
7.8
7.8
7,8
7.8
7.8
7.8
7.8
7.7
7.8
7.8
7.0
7.8
7.8
7.6
7.5
7.7
7.8
7,7
7.8
7.8
7.8
7.7
7.8
7.8
7.B
7.B
7.8
TOTAL
AMMONIArMG/L
(NH3 AS N)
O.10
0.08
0.02
0.08
0.03
0.08
14.39
0.21
0.10
0.10
0.08
0.08
0.10
0.10
0.02
0.03
0.07
0.12
31.25
0.20
0.03
0.18
0.10
0.18
0.12
0.14
0.21
0.04
O.O3
0.04
0.07
0.07
0.07
0.15
0.09
UN-IONIZED TIME ADJUSTED
AMMONIA* MG/L UN-IONIZED AMMONIA*
(NH3 AS N) M6/L (NH3 AS N)
O.OO124
0.00097
0.00019
0.00083
0.00026
O.OO064
0.01929 STP
0.00204
0.00094
0.00094
O.OOO79
0.00079
0.00092
0.00094
0.00015
0.00025
0.00070
0.00115
0.06633 STP
0.00192
0.00032
0.00114
0.00049
0.00132
O. 00116
0.00111
0.00211
0.00040
0.00032
0.00033
0.00067
0.00067
0.00067
0.00146
0.00089
0.00139
0.00109
0.00022
0.00093
0.00029
0.00071

0.00253
0.00116
0.00115
0.00120
0.00100
0.00117
0.00118
0.00019
O.OO031
O.OO087
0.00142

0.00220
0.00037
0.00130
0.00056
0.00159
O.OO134
0.00128
0.00243
0.00046
0.00037
0.00037
0.00077
0.00077
O.OO077
O.OO167
0.00102
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                     UEEK  *30


                     DATE:   4/  2/79
js

N5
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SD
5E
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10 A
10B
IOC
10D
10E
TIME
1410
1412
1415
1420
1430
1435
1330
1455
1457
1500
1505
1507
1510
1512
1515
1520
1523
1525
1550
1555
1600
1603
1605
1607
1609
1610
1612
1615
1617
1618
1620
1622
1625
1628
1630
TEMPERATURE* PH
DEG.C
7.8
8.4
7.3
6.5
6.4
6.6
11.3
6.5
6.4
6.6
7.8
6.7
6.6
6.4
6.7
6.8
6.5
6.5
8.6
6.5
6.6
6.7
6.6
8.2
6.4
6.5
6.4
6.3
6.2
6.2
7.5
7.6
6.5
6.4
6.1
8.0
7.9
7.8
7.7
7.8
7.7
6.9
7.6
7.7
7.7
7.9
7.8
7.8
7.9
7.7
7.7
7.7
7.7
7.2
7.8
7.7
7.7
7.8
7.9
7.8
7.8
7.8
7.8
7.8
7.8
7.8
7.8
7.8
7.8
7.8
TOTAL
AMMONIA»MG/L
(NH3 AS N)
0.23
0.19
0.08
0.23
0.07
0.12
28.54
0.23
0.12
0.10
0.07
0.03
0.23
0.02
0.06
0.03
0.03
0.07
5.45
0.02
0.01
0.01
0.02
0.16
0.02
0,01
0.07
0.01
0.06
0.01
0.02
0.12
0.11
0.07
0.06
UN-IONIZED TIME ADJUSTED
AMMONIA* MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L (NH3 AS N)
0.00355
0.00244
0.00077
0.00162
0.00058
0.00082
0.04667 STP
0.00129
0.00080
0.00070
0.00091
0.00030
0.00205
0.00018
0.00041
0.00024
0.00023
0.00046
0.01438 STP
0.00015
0 . 00006
0 . 00006
0.00015
0.00198
0.00014
0.00007
0.00065
0.00007
0.00050
0.00007
0.00016
0.00111
0.00094
0.00058
0.00049
0.00363
0.00249
0.00079
0.00164
0.00058
0.00082

0.00128
0.00080
0.00069
0.00091
0.00030
0.00212
0.00019
0.00043
0.00025
0.00024
O.OOO49

0.00015
0.00006
0.00006
0.00015
0.00198
0.00014
0.00007
0.00065
0.00007
0.00050
0.00007
0.00016
0.00111
0,00094
0.00058
0,00049
                    NOTE: *  INDICATES UN-IONIZED  AMMONIA CONCENTRATION  IN RIVER GREATER  THAN 0.02 MG/L
                          AND  PH GREATER THAN OR  EQUAL TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND  PH LESS THAN 8.5
                          IF TEMPERATURE LESS THAN  5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES C

-------
UEEK


DATE?  4/ 9/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
5B
5C
5D
5E
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
1OB
IOC
100
1OE
TIME
1425
1430
1435
1440
1445
1450
1320
1500
1505
1510
1512
1515
1517
1520
1523
1525
1530
1535
1600
1603
1605
1608
1610
1615
1617
1619
1623
1625
1627
1630
1632
1635
1637
1639
1640
TEMPERATURE t PH
DEG.C
12.5
12.4
10.8
10.7
10.4
10.3
14.8
11.0
10.9
11.1
12.2
11.2
11.1
11.1
11.5
11.5
11.3
11.2
14.0
11.0
11. 0
11.2
10.9
13.8
11.4
11.2
11.1
11.1
11.1
11.2
12.3
11.5
11.4
11.1
11.2
7.9
8.0
7.6
7.6
7.5
7.4
6.9
7,7
7.6
7.8
8.0
7.7
7.6
7.6
7.7
7.8
7.8
7.9
8.4
7.9
7.9
7.8
7.6
8.0
7.9
7.9
7.8
7.9
7.7
7.7
7.8
7.9
7.8
7.7
7.8
TOTAL
AMMONIAfMG/L
CNH3 AS N)
0.21
0.19
0.19
0.18
0.12
0.15
11.92
0.21
0.16
0.16
0.16
0.21
O.2O
0.20
0.16
0.22
0.16
0.16
0.74
0.28
O.13
0.13
0.13
0.21
O.22
0.18
0.22
0.22
0.24
0.18
0.18
0.15
0.19
0.15
0.21
UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MB/L (NH3 AS N)
0.00363
0.00415
0.00148
0.00141
0.0007O
0.00071
0.02549 STP
0.00206
0.00205
0.00208
0.00356
0.00209
0.00158
0.00158
0.00171
0.0029O
0.00211
0.00263
0.04436 STP
0.00440
0.00207
0.00168
0.00104
0.00501
0.00361
O.O0289
0.00281
0,00352
0.00240
0.001B4
0.00251
0.00242
O.0024S
0.00149
0.00262
0.00368
0.00420
0.00149
0.00141
0.00070
0,00071

0.00204
0.002O3
0.00208
0.00356
0.00216
0.00164
0.00167
0.00180
0.00305
0.00222
0.00277

0.00440
0.002O7
0.00168
0.00104
0.00501
0.00361
0.00289
0.00281
0.00352
0.00240
0.00184
0.00251
0.00242
0.00245
O.OO149
0.00262
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIUER GREATER THAN 0.02 MG/L

      AND PH GREATER THAN OR EUUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L

      AND PH LESS THAN 8.5                                                             rr-^ctrce r-
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEG&EE5 C

-------
WEEK *32

DATE:  4/19/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
SE
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1325
1330
1335
1340
1345
1350
1315
1410
1412
1415
1417
1425
1427
1430
1432
1435
1438
1440
1505
1507
1509
1510
1513
1515
1518
1520
1522
1524
1526
1528
1529
1530
1532
1534
1535
TEMPERATURE ? PH
DEG.C
12.5
12.3
11.0
N/A
N/A
11.5
14.8
11.5
11.4
11.5
14.0
12.2
12.2
12.3
12.3
12.2
12.4
12.8
14.4
11.7
11.7
11.7
12. O
16.6
11.9
11.9
11.9
11.8
11.6
11.6
12.0
11.9
12.0
11.8
11.6
7.8
7.6
7.4
N/A
N/A
7.6
7.4
7.7
7.6
7.7
8.1
7.7
7.6
7.6
7.6
7.6
7.7
7.6
9.0
7.7
7,7
7.7
7.8
8.1
7.8
7.8
7.8
7.7
7.7
7.7
7,7
7.7
7.7
7.7
7.7
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA>M6/L AMMONIA, MG/L UN-IONIZED AMMONIA*
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.31
0.21
0.14
N/A
N/A
0.11
23.03
0.43
0.12
0.24
0.29
0.30
0.28
0.20
0.26
0.17
0.16
0.14
11.10
0.35
0.30
0.30
0.30
0.42
0.33
0.28
0.28
0.22
0.14
0.13
0.28
0.21
0.10
0.17
0.29
0.00440
0.00181
0.00070
INSUFFICIENT DATA
INSUFFICIENT DATA
0.00088
0.15496 STP
0.00444
0.00101
0.00248
0.00891
0.00324
0.00244
0.00174
0.00231
0.00151
0.00183
0.00128
2.30252 STP
0.00364
0.00312
0.00312
0.00412
0.01570
0.00442
0.00376
0.00376
0.00236
0.00146
0.00138
0.00302
0.00229
0.00107
0.00184
0.00301
0.00460
0.00189
0.00073


0.00091

0.00454
0.00103
0.00252
0.00936
0.00332
0.00250
0.00178
0.00237
0.00154
0.00188
0.00131

0.00363
0.00311
0.00311
0.00410
0.01531
0,00445
0.00378
0.00377
0.00237
0.00147
0.00138
0.00302
0.00229
0.00106
0.00183
0.00301
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                     UEEK *33

                     DATE:  4/23/79
Ln
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1435
1437
1440
1445
1450
1455
1255
1510
1512
1515
1517
1520
1523
1526
1530
1533
1537
1540
1605
1607
1608
1610
1613
1615
1617
1620
1623
1625
1627
1630
1633
1635
1640
1642
1645
TEMPERATURE r PH
DEG.C
14.0
13.3
11.4
N/A
N/A
12.3
15.9
12.7
12.6
12.7
15.7
13.9
13.9
13.4
13.4
13.4
14.0
12.8
15.8
12.7
12.7
12.8
12.9
17.2
13.0
12.9
12.7
12.7
12.5
12.6
14.8
13.8
13.0
12.8
12.6
7.6
7.7
7.5
N/A
N/A
7.2
7.0
7.5
7.6
7.6
7.5
7.4
7.3
7.5
7.4
7.5
7.5
7.4
8.6
7.5
7.6
7.6
7.4
7.7
7.6
7.6
7.3
7.5
7.3
7.4
7.6
7.5
7.7
7.7
7.7
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIAtMG/L AMMONIA, MG/L UN-IONIZED AMMONIAr

-------
 WEEK *34

 DATE:   4/30/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SO
5E
5F
SB
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1430
1440
1445
1310
1320
1330
1300
1500
1503
1505
1645
1510
1515
1517
1520
1523
1526
1530
1545
1547
1550
1552
1555
1558
1600
1602
1605
1608
1610
1612
1614
1616
1617
1618
1620
TEMPERATURE. PH
DEG.C
17.1
16.5
15.9
13.3
13.9
15.7
18.0
13.1
12.9
13.3
18.3
14.3
14.6
13.9
14.2
13.8
14.0
13.1
16.6
12.1
12.9
12.9
13.0
17.8
13.7
13.6
13.4
13.3
13.1
13.1
15.8
13.3
12.9
13.0
12.9
7.6
7.7
7.6
7.5
7.5
7.5
6.7
7.5
7.5
7.6
7.7
7.6
7.5
7.6
7.6
7.6
7.6
7.6
8.7
7.5
7.5
7.6
7.6
7.6
7.6
7.6
7.5
7.6
7.6
7.6
7.5
7.6
7.6
7.5
7.6
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIArMG/L AMMONIAr MG/L UN-IONIZED AMMONIA*
(NH3 AS N) (NH3 AS N) MG/L 
-------
 UEEK *35


DATE:  5/ 8/77
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1130
1435
1445
132S
1335
1340
1315
1510
1512
1515
1520
1522
1525
1530
1535
1540
1545
1SSO
1610
1612
1615
1620
1622
1625
1627
1630
1632
1634
1636
1640
1643
1646
1650
1652
1655
TEMPERATURE » PH
DEG.C
11.0
11.2
10.1
10.6
10.1
10.0
15.1
10.5
10.3
10.3
12.3
10.3
1O.2
10.2
10.2
10. 0
10.1
1O.3
13.8
10.5
10.5
10.5
10.5
10.9
1O.5
10.5
10.5
10.5
10.4
10.5
10.8
10.5
10.4
10.4
10.4
7.8
7.8
7.5
7.5
7.6
7.6
7.2
7.6
7.6
7.8
7.8
7.6
7.7
7.6
7.7
7.7
7.6
7.6
8.5
7.6
7.7
7.7
7.7
7.7
7.6
7.6
7.6
7.7
7.7
7.6
7.8
7.7
7.7
7.7
7,6
TOTAL
AMMONIAiMG/L
(NH3 AS N)
0.24
0.1V
0.30
0.19
0.24
0.14
11.94
O.19
0.21
0.20
0.16
0.21
0,17
0,17
0.16
0.20
0.16
0.35
5.82
0.39
0.21
0.35
0.22
0.18
0.12
0,07
0.15
0.12
0.16
0.12
0.16
0.21
0.14
0.12
0.16
UN-IONIZED TIME ADJUSTED
AMMONIA F MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L 
-------
                        WEEK  *36

                        DATE:   5/13/79
00
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
SB
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
106
IOC
10D
10E
TIME
1300
1305
1310
1320
1325
1330
1250
1345
1347
1350
1355
1400
1405
1410
1415
1420
1425
1430
1445
1450
1455
1458
1459
1500
1505
1508
1510
1512
1514
1515
1517
1519
1520
1522
1525
TEMPERATURE r PH
DEG.C
15.9
14.2
12.6
12.5
12.6
12.8
17.4
13.4
12.9
12.8
16.1
14.4
14.4
14.0
14.1
14.0
14.0
13.2
18.3
13.4
13.4
13.5
13.6
16.7
14.3
14.1
13.9
13.9
13.7
13.6
16.9
16.3
14.6
13.4
13.6
7.7
7.7
7.5
7.6
7.7
7.7
7.2
7.8
7.7
7.7
7.9
7.7
7.8
7.8
7.8
7.7
7.6
7.8
7.9
7.8
7.8
7.8
7.8
7.9
7.9
7.9
7.9
7.9
7.8
7.8
7.9
7.9
7.8
7.8
7.8
TOTAL
AMMONIA»MG/L
 MG/L (NH3 AS N)
0.00190
0.00189
0.00124
O.OO1O3
0.00195
0.00302
0.08376 STP
0.00235
0.00124
0.00142
0.00266
0.00362
0.00387
0.00259
0.00287
0.00217
0.00132
0.00207
0.32304 STP
0.00211
0.00248
0.00275
0.00252
0.00555
0.00349
0.00311
0.00355
0.00355
0.00241
0.00264
0.00403
0.00597
0.00475
0.00260
0.00314
0.00202
0.00199
0.00130
0.00108
0.00204
0.00315

0.00244
0.00128
0.00146
0.00285
0.00369
0.00395
0.00264
0.00293
0.00222
0.00135
0.00212

0.00211
0.00248
0.00275
0.00251
0.00547
0.00353
0.00314
0.00358
0.00358
0.00242
0.00266
0.00405
0.00600
0.00476
0.00261
0.00315
                       NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                             AND PH GREATER THAN OR EQUAL TO 8.5
                             ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                             AND PH LESS THAN 8.5
                             IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                    UEEK *37

                    DATE:   5/21/79
JS

VO
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
SA
58
5C
SO
SE
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIHE
1050
1055
1100
1105
1110
1115
1040
1130
1132
1135
1355
1140
1145
1150
1155
1200
1210
1220
1255
1258
1300
1302
1305
1307
1308
1310
1313
1315
1317
1320
1322
1325
1327
1329
1330
TEMPERATURE? PH
DEG.C
14.5
13.9
13.8
13.3
12.9
12.9
18.4
13.5
13.5
13.5
19.5
15.5
15.5
14.4
15.1
15.7
15.1
15.0
N/A
14.0
14.0
14.3
14.7
18.1
14.4
14.3
14.2
14.1
14.2
14.4
15.2
15.1
14.4
14.5
14.0
7.2
7.4
7.3
7.4
7.4
7.4
6.9
7.4
7.4
7.4
7.4
7.4
7.2
7.4
7.2
7.4
7.4
7.4
N/A
7.5
7.4
7.4
7.5
7.6
7.5
7.5
7.5
7.5
7.4
7.4
7.5
7.5
7.4
7.5
7.5
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L AMMONIA, MG/L UN-IONIZED AMMONIA,
(NH3 AS N) (NH3 AS N) MO/L (NH3 AS N)
0.17
0.21
0.21
0.19
0.24
0.20
12.76
0.21
0.20
0.21
0.16
0.17
0.20
0.17
0.16
0.18
0.17
0.20
N/A
0.15
0.16
0.13
0.17
0.20
0.16
0.22
0.19
0.16
0.21
0.22
0.22
0.24
0.16
0.15
0.22
0,00072
0,00129
0,00106
0.00114
0.00139
0,00114
0.03570 STP
0.00130
0.00120
0,00130
0.00157
0.00122
0.00089
0.00113
0.00068
0.00130
0.00119
0.00135
INSUFFICIENT DATA
0.00118
0.00099
0.00085
0.00145
0.00268
0.00135
0.00181
0.00153
0.00125
0.00138
0.00145
0.00194
0.00206
0.00102
0.00122
0.00177
0.00082
0.00146
0.00120
0.00128
0.00156
0.00128

0.00145
0.00134
0.00145
0.00168
0.00128
0.00092
0.00116
0.00070
0.00133
0.00120
0.00135

O.OO124
0.00104
0.00090
0.00152
0.00283
0.00144
0.00192
0.00162
0.00133
0.00146
0.00153
0.00205
0.00218
0.00108
0.00129
0.00186
                   NOTE:  * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                         AND PH GREATER THAN OR EQUAL TO 8.5
                         ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                         AND PH LESS THAN 8.5
                         IF TEMPERATURE LESS THAN 5.0 DEGREES  C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
UEEK t3S

DATE:  6/ 1/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1320
1330
1340
134S
1350
1400
1240
1415
1417
1419
1620
1420
1425
1428
1430
1433
1438
1440
1525
1528
1530
1532
1534
1535
1537
1539
1540
1542
1543
1544
1545
1546
1547
1549
1550
TEMPERATURE r PH
DEB.C
12.4
11.9
13.1
13.0
13.2
13.3
19.0
12.5
12.3
12.4
19.6
12.8
12.5
12.7
12. S
12.5
12.5
12.4
23.0
12.8
12.6
13.0
12.8
18.3
13.0
13.0
13.0
12.8
12.7
13.2
14.6
13.0
12.9
12.8
12.6
7.2
7.1
7.1
7.1
7.1
7.1
6.8
7.1
7.2
7.1
7.4
7.2
7.1
7.1
7.2
7.1
7.2
7.2
7.8
7.0
7.1
7.1
7.1
7.2
7.1
7.1
7.1
7.1
7.1
7.1
7.1
7.1
7.1
7.0
7.1
TOTAL
AMMONIA. MG/L
(NH3 AS N)
0,19
0.16
0.18
0.12
0.12
0.15
10.70
0.15
0.14
0.13
0.16
0.13
0.12
0.11
0.15
0.08
O.O7
0.12
4.64
0.16
0.16
0.14
0.17
0.19
0.19
0.18
0.18
0.12
0.16
0.16
0.16
0.23
0.16
0.12
0.10
UN-IONIZED TIME ADJUSTED
AMMONIAr MG/L UN-IONIZED AMMONIA ,

-------
                       WEEK #39


                       DATE:  6/ 8/79
Ln
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
5B
5C
SD
5E
5F
SB
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1225
1230
1240
1250
1200
1315
1215
1340
1345
1350
1620
1355
1400
1405
1410
1412
1415
1420
1450
1452
1455
1500
1503
1505
1510
1513
1515
1520
1523
1525
1528
1530
1533
1535
1540
TEMPERATURE f PH TOTAL
DE6.C AMMONIAtMO/L

-------
                      WEEK #40


                      DATE:   6/13/79
01
to
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
5B
5C
5D
5E
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
930
935
940
950
1000
1010
1020
1100
1103
1105
1255
1107
1109
1110
1112
1113
1114
1115
1200
1202
12O4
1206
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
TEMPERATURE, PH
DEG.C
14.4
14.4
14.5
16.0
17.3
17.4
20.8
16.1
15.4
15.4
19.6
15.5
15.3
15.5
15.5
15.5
15.4
15.5
25.8
16.0
16.1
16.0
15.9
18.2
16.1
16.1
16.0
16.0
16.0
16.1
18.1
17.0
16.1
15.9
16.0
7.3
7.4
7.3
7.4
7.4
7.4
6.9
7.3
7.4
7.4
7.3
7.3
7.4
7.4
7.4
7.4
7.4
7.4
8.7
7.3
7.4
7.4
7.4
7.5
7.4
7.3
7.4
7.4
7.4
7.4
7.4
7.4
7.4
7.4
7.4
TOTAL
AMMONIA, MG/L
(NH3 AS N)
0.32
0.21
0.18
0.16
0.20
0.15
11.74
0.16
0.16
0.17
0.21
0.18
0.13
0.15
0.12
0.12
0.09
0.13
2.92
0.10
0.10
0.10
O.16
0.10
0.16
0.22
0.14
0.11
0.12
0.11
0.09
O.09
0.08
0.14
0.09
UN-IONIZED TIME ADJUSTED
AMMONIA* MB/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L (NH3 AS N)
0.00167
0.00140
0.00095
0.00121
0.00160
0.00121
0.03912 STP
0.00092
0.00110
0.00122
0.00163
0.00102
0,00092
0.00105
0.00082
0.00087
0.00064
0.00093
0.67674 STP
0.00058
0.00073
0.00073
O.OO120
0.00107
0.00116
0.00131
0.00103
0.00079
0.00085
0.00079
0.00078
0.00072
0.00061
0.00102
0.00067
0.00197
0.00165
0.00111
0.00141
0.00186
0.00140

0.00104
0.00124
0.00137
0.00186
0.00110
0.00099
0.00113
0.00088
0.00094
0.00068
0.00100

O.O0062
0.00079
0.00078
0.00129
0.00118
0.00126
0.00143
O.O0112
0.00086
0.00092
0.00086
O.O0084
0.00078
0.00066
0.00111
0.00072
                      NOTE:  *  INDICATES  UN-IONIZED AMMONIA  CONCENTRATION IN  RIUER  GREATER  THAN 0.02  MB/L
                             AND  PH GREATER  THAN  OR EQUAL  TO 8.5

                  **  INDICATES  UN-IONIZED AMMONIA CONCENTRATION  IN  RIVER  GREATER  THAN  0.02  MG/L
                             AND  PH LESS  THAN  8.5
                             IF TEMPERATURE  LESS  THAN 5.0  DEGREES C THEN  UN-IONIZED AMMONIA CALCULATED  AT  5.0  HEGREES C

-------
                      UEEK *41

                     DATE'.   6/20/79
Ol
u>
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
A
5A
SB
5C
50
5E
5F
50
6
7A
79
7C
70
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
1OD
10E
TIME
1355
1400
1410
1420
1430
1435
1345
1520
1522
1524
1710
1526
1528
1530
1533
1536
1538
1540
1620
1622
1624
1626
1628
1630
1632
1634
1636
1638
1640
1642
1644
1646
1648
1650
1655
TEMPERATURE » PH
DEG.C
12.0
12.8
12.2
13.0
13.0
12.8
21.5
12.8
12.6
12.6
12.6
13.2
12.9
12.8
12.6
12.6
12.6
12.6
23.2
13.7
13.6
13.6
13.5
18.2
14.2
13.8
13.5
13.5
13.5
13.6
14.1
13.7
13.5
13.5
13.5
7.4
7.3
7.3
7.3
7.4
7.3
6.7
7.4
7.3
7.3
7.5
7.4
7.4
7.3
7.3
7.3
7.3
7.3
7.9
7.6
7.4
7.4
7.4
7.6
7.5
7.4
7.4
7.4
7.4
7.4
7.6
7.4
7.4
7.4
7.4
TOTAL
AHMONIA.MG/L
(NH3 AS N)
0.12
0.14
0.15
0.16
0.15
0.25
7.57
0.18
0.12
0.19
0.29
0.19
0.20
0.21
0.21
0.21
0.20
0.20
3.17
0.15
0.18
0.16
0.16
0.37
0.19
0.20
0.20
0.21
0.21
0.19
0.09
0.25
0.15
0.07
0.25
UN-IONIZED TIME ADJUSTED
AMMONIA. MG/L UN-IONIZED AMMONIA,

-------
                      WEEK #42



                      DATE!   A/30/79
Ln
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1220
1225
1230
1250
1300
131O
1215
930
932
935
1200
938
940
942
946
949
952
955
1050
1053
1055
1100
1102
1105
1107
1109
1111
1115
1117
1119
1120
1124
1126
1128
1130
TEMPERATURE » PH
DEG.C
17.5
17.8
18.1
19.1
17.9
18. 6
14.0
16.7
16.0
16.2
20.2
16.5
16.3
16.1
16.0
16.0
16.0
16.1
24.2
17.4
16.8
16.8
16.8
20.2
16.8
16.6
16.7
16.5
16.7
16.5
17.1
17.0
16.9
16.8
16.9
7.1
7.1
7.0
7.1
7.1
7.1
6.9
7.1
7.2
7.2
7.3
7.4
7.3
7.3
7.3
7.3
7.3
7.2
8.8
7,2
7.2
7.1
7.1
7.3
7.3
7.3
7.3
7.2
7.4
7.3
7.3
7.4
7.2
7.4
7.4
TOTAL
AMMONIA i MG/L
(NH3 AS N)
0.15
0.18
0.14
0.15
0.18
0.16
3.95
0.21
0.12
0.18
0.15
0.21
0.17
0.12
0.18
O.12
0.11
0.14
0.31
0.12
0.15
0.21
O.17
0.30
0.15
0.12
0.13
0.11
O.10
0.11
0.15
0.16
0.14
0.16
0.14
UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L UN-IONIZED AMMONIA,
(NH3 AS N) MG/L (NH3 AS N>
0.00061
0.00077
0.00048
0.00069
0.00077
0.00070
0.00794 STP
0.00080
0.00054
0.00086
0.00118
0.00163
0.00103
0.00068
0.00106
0.00072
O. 00063
0.00066
0.07916 STP
0.00064
0.00073
0.00081
0.00068
0.00243
0.00092
0.00071
0.00081
0.00052
O.O0077
0.00065
0.00094
0.00130
0.00070
0.00122
0.00110
0.00066
0.00083
0.00052
0.00073
0.00082
0.00074

0.00095
0.00063
0.00101
0.00142
0.00193
0.00122
0.00080
O.O0124
O. 00084
0.00073
0.00076

0.00071
0.00081
0.00089
0.00075
0.00277
0.00103
0.00079
0.00091
0.00058
O. 00085
0.00072
0.00105
0.00145
0.00077
0.00135
0.00122
                      NOTE:  *  INDICATES  UN-IONIZED AMMONIA  CONCENTRATION  IN  RIVER  GREATER  THAN  0.02  MG/L
                            AND  PH  GREATER  THAN  OR EQUAL  TO 8.5

                            ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN O.O2 MG/L

                            AND  PH  LESS  THAN  8.5
                            IF TEMPERATURE  LESS  THAN 5.0  DEGREES  C  THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES C

-------
Ln
MEEK *43
DATE: ?/ 5/79
STATION
NUMBER
	 ~is~ "
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
1G
20
1C
2C
3C
TIME
~ 1310
1315
1320
1330
1340
1350
1305
1130
1133
1135
1320
1137
1138
1139
1140
1141
1143
1145
1225
1228
1230
1233
1235
1237
1238
1240
1242
1244
1246
1248
1250
1252
1255
1258
1300
1345
1348
1355
1357
1400
TEMPERATURE F PH
DEG.C
15.3
17.3
15.5
17.1
18.5
18.8
22.9
16.6
16.4
16.1
18.9
16.8
16.4
16.3
16.2
16.1
16.1
16.2
21.1
16.4
16.4
16.5
17.2
18.4
16.7
16.8
16.6
16.6
16.6
17.3
16.6
16.5
16.5
16.5
16.5
17.8
17.4
15.7
15.5
15.3
7.0
7.0
7.0
7.0
7.0
7.0
6.8
7.1
7.1
7.2
7.3
7.2
7.3
7.3
7.2
7.3
7.3
7.3
8.6
7.3
7.3
7.3
7.3
7.2
7.2
7.1
7.2
7.2
7.1
7.1
7.2
7.2
7.3
7.3
7.1
7.3
7.4
7.1
7.3
7.3
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA, MG/L AMMONIA. MG/L UN-IONIZED AMMONIA*
(NH3 AS N) (NH3 AS N> M6/L (NH3 AS N>
0.15
0.14
N/A
0.19
0.21
0.22
15.13
0.12
0.15
0.07
0.11
0.12
0.21
0.13
0.10
0.15
0.11
0.19
0.39
0.13
0.14
0.10
0.12
0.19
0.08
0.07
0.09
O.O6
0.07
0.08
0.13
0.16
0.13
0.12
0.26
0.16
0.17
0.12
0.11
0.04
0.00041
0.00045
INSUFFICIENT DATA
O.OO06O
0.00073
0.00080
0.04664 STP
O. 00045
0.00056
0.00031
0.00078
0.00061
0.00124
0.00079
0.00047
0.00087
0.00063
0.00112
0.05774 STP
0.00079
0.00084
0.0006O
0.00079
0.00105
0.00040
0.00026
0.00044
0.00028
0.00025
0.00034
0.00064
0.00076
0.00080
O. 00075
0.00101
0.00110
0.00141
0.00045
0.00060
0.00023
0.00044
0.00048

0.00063
0.00076
0.00083

0.00049
0.00063
0.00034
0.00086
0.00064
0.00130
0.00082
0.00049
0.00091
0.00066
0.00117

0.00085
0.00090
0.00064
0.00084
0.00113
0.00043
0.00028
0.00047
0.00030
0.00027
0.00036
0.00069
0.00081
0.00086
0.00080
0.00108
0.00114
0.00141
0.00046
0.00060
0.00023
                    NOTE: *  INDICATES UN-IONIZED AMMONIA CONCENTRATION  IN RIVER GREATER  THAN 0.02 MG/L
                          AND PH GREATER THAN OR EQUAL TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L

                          IFDTEMPERATUREALESS5THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES C

-------
WEEK *44


DATE:  7/13/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
SO
6
7A
7B
7C
7D
a
9A
9B
9C
9D
9E
9F
10A
10B "
IOC
10D
10E
TIME
1015
1020
1023
1025
1O30
1035
1010
1100
1102
1105
1320
1107
1109
1110
1112
1115
1120
1125
1200
1203
1205
1207
1209
1210
1212
1215
1216
1218
1220
1225
1227
1230
1235
1240
1245
TEMPERATURE f PH
DEG.C
18.1
N/A
18.1
N/A
17.1
N/A
22.6
N/A
19.0
N/A
19.9
18.7
N/A
18.8
N/A
18.5
N/A
N/A
25.3
19.1
N/A
19.1
N/A
19.1
N/A
19.4
N/A
N/A
19,1
N/A
N/A
19.5
N/A
19.4
N/A
6.5
N/A
6.5
N/A
6.5
N/A
6.5
N/A
6.5
N/A
6.7
6.9
N/A
6.6
N/A
6.5
N/A
N/A
8.8
6.5
N/A
6.6
N/A
6.8
N/A
6.7
N/A
N/A
6.9
N/A
N/A
7.0
N/A
6.9
N/A
TOTAL UN-IONIZED TIME ADJUSTED
AMHONIAfMG/L AMMONIAr MG/L UN-IONIZED AMMONIA,
(NH3 AS N) 
-------
                     WEEK *A5
                     DATE:  7/21/79
Ui
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1535
1540
1550
1600
1630
1700
1350
1400
1405
1410
1610
1620
1625
1630
1635
1640
1645
1650
1440
1442
1445
1448
1450
1455
1500
1505
1510
1515
1520
1525
1530
1535
1540
1545
1555
TEMPERATURE? PH
DEG.C
22.5
21.7
21.0
21.2
21.2
21.4
25.7
N/A
N/A
N/A
24.0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
24.0
20.7
21.9
21.9
22.0
22.8
21.0
20.9
20.8
20.7
20.8
21.0
21.3
21.1
20.8
20.7
20.7
7.4
7.4
7.4
7.4
7.4
7.4
6.7
N/A
N/A
N/A
7.3
N/A
N/A
N/A
N/A
N/A
N/A
N/A
8.0
7.4
7.3
7.3
7.3
7.5
7.4
7.4
7.4
7.3
7.3
7.3
7.2
7.3
7.3
7.3
7.3
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIA* MG/L UN-IONIZED AMMONIA.
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N>
0.34
O.15
0.09
0.08
0.10
0.12
5.25
N/A
N/A
N/A
0.29
N/A
N/A
N/A
N/A
N/A
N/A
N/A
0.16
0.06
0.08
0.09
0.34
0.31
0.12
0.15
0.05
0.08
0.01
0.17
0.54
0.34
0.08
0.33
0.32
0.00399
0.00165
0.00096
0.00089
0.00106
0.00126
0.01567
INSUFFICIENT
INSUFFICIENT
INSUFFICIENT
0.00301
INSUFFICIENT
INSUFFICIENT
INSUFFICIENT
INSUFFICIENT
INSUFFICIENT
INSUFFICIENT
INSUFFICIENT
0.00828
0.00060
0.00074
0.00082
0.00306
0.00474
0.00131
0.00156
0.00052
0.00068
0.00007
0.00146
0.00373
0.00287
0.00069
0.00272
0.00265




STP
DATA
DATA
DATA
DATA
DATA
DATA
DATA
DATA
DATA
DATA
STP






0.
0.
0.
0.
0.
0.



0.





0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
00399
00165
00096
00089
00106
00126



00301





00060
00075
00082
00307
00468
00133
00158
00052
00068
00007
00146
00373
00286
00069
00272
002A5
                      NOTE:  * INDICATES  UN-IONIZED AMMONIA  CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                                                            CONCENTRATION IN RIMER GREATER THAN 0.02 MG/L
                                                     5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                       WEEK #46


                       DATE:   7/27/79
oo
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
SA
SB
SC
3D
5E
5F
SB
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIME
1240
1245
1250
1255
1305
1310
1220
1350
1355
1400
1403
1405
1408
1410
1412
1414
1417
1420
1505
1508
1510
1518
1520
1524
1526
1528
1530
1533
1536
1538
1400
1410
1430
1500
1550
TEMPERATURE F PH
DEG.C
22.7
22.6
22,7
23.4
22.5
22.7
27.1
22.6
22.6
22.6
24.3
26.1
25.7
24.4
24.4
24.6
24.4
24.2
29.1
24.3
24.3
24.3
24.3
25.6
25.5
24.9
24.4
24.2
24.2
24.3
25.7
24.7
24.3
24.3
24.6
7.6
7.6
7.7
7.5
7.5
7.4
6.9
7.9
7.5
7.7
7.3
7.6
7.8
7.8
7.7
7.8
7.8
7.9
9.7
7.3
7.3
7.1
7.2
7.2
7.6
7.8
7.7
7.5
7.4
7.6
7,4
7.4
7.5
7.5
7,3
TOTAL
AMMONIAtMG/L

0.19
0.16
0.17
0.40
0.29
0.30
0.39
0.40
0.20
0.39
0.31
0.58
0.11
0.18
0.11
0.21
0.20
0.23
0.68
0.30
O.21
0.27
0.06
0.58
0.45
0.27
0.34
0.25
0.35
0.22
0.50
0.28
0.25
0.21
0.39
UN-IONIZED TIME ADJUSTED
AMMONIA* MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L (NH3 AS N)
0.00357
0.00308
0.00408
0.00637
0.00427
0.00355
0.00201 STP
0.01479
0.00295
0.00907
0.00334
0.01395
0.00389
0.00602
0.00284
0.00721
0.00657
0.00943
0.54024 STP
0.00325
0.00229
0.00184
0.00049
0.00537
0.01037
O.O0934
0.00897
0.00426
0.00460
0.00469
0.00742
0.00386
0.00429
0.00360
0.00422
0.00380
0.00328
0.00433
0.00674
0.00450
0.00373

0.01522
0.003O3
0.00930
0.00355
0.01419
0.00396
0.00613
0.00290
0.00735
0.00669
0.00962

0.00324
0.00227
0.00182
0.00049
0.00521
0.01038
0. 00935
0.00897
0.00426
0.00460
0.00469
0,00769
0.00399
0.00440
0.00364
0.00422
                       NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                             AND PH GREATER THAN OR EQUAL TO 8.5
                             ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                             AND PH LESS THAN 8.5
                             IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONTZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
Ui
VO
WEEK *47
DATE: a/ 4/79
STATION
NUMBER
TIME
TEMPERATURE r PH
DEG.C
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIArMG/L AMMONIA, MG/L UN-IONIZED AMMONIAr
(NH3 AS N) (NH3 AS N) MG/L CNH3 AS N)
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
SA
SB
5C
50
5E
5F
5G
6
7A
7B
7C
70
8
?A
9B
9C
90
9E
9F
10A
10B
IOC
100
10E
1605
HOB
1110
1115
1120
1130
1100
1030
1035
1040
1045
1050
1052
1054
1056
1057
1059
1100
945
948
950
953
955
1000
1005
1007
1010
1015
1017
1020
1022
1024
1026
1028
1030
17.4
17.6
N/A
N/A
N/A
N/A
18.3
N/A
N/A
N/A
17.2
N/A
N/A
N/A
N/A
N/A
N/A
N/A
19.4
16. B
16.8
16.7
16.8
17.0
17.2
17.0
16.8
16.8
16.8
16.7
17.4
17.2
16.9
16.8
16.8
7.2
7.1
7.2
7.2
7.3
7.1
6.8
N/A
N/A
N/A
7.2
N/A
N/A
N/A
N/A
N/A
N/A
N/A
9.0
7.4
7.4
7.3
7.4
7.0
7.3
7.3
7.4
7.4
7.4
7.4
7.1
7.1
7.4
7.3
7.4
0.30
0.35
0.21
0.56
0.32
0.16
8.78
N/A
N/A
N/A
0.11
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1.24
0.23
0.31
0.14
0.07
0.16
0.06
0.30
0.24
0.25
0.26
0.10
0.22
0.36
0.21
0.11
0.13
0.00153
0.00148
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
0.01938 STP
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
0.00054
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
INSUFFICIENT DATA
0.34203 STP
0.00180
0.00244
0.00086
0.00051
0.00052
0.00037
0.00187
0.00186
0.00193
0.00206
0.00077
0.00091
0.00147
0.00162
0.00066
0.00103
0.00153
0.00165








0.00071








0.00205
0.00278
0.00098
0.00058
0.00062
0.00042
0.00215
0.00214
0.00221
0.00235
0.00087
0.00104
0.00167
0.00184
0.00076
0.00117
                   NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION  IN RIVER GREATER THAN  0.02  MG/L
                         AND PH GREATER THAN OR EQUAL TO 8.5
                         ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                         AND PH LESS THAN 8.5                                                                  _,_„  „
                         IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES  C

-------
WEEK MSA


DATE*  8/ 7/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
36
3C
4
5A
SB
5C
5D
5E
5F
56
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1310
1315
1320
1325
1330
1340
1300
1400
1405
1410
1620
1415
1420
1425
1430
1433
1435
1440
1500
1505
1508
1510
1517
1520
1522
1525
1528
1530
1534
1537
1540
1545
1550
1553
1555
TEMPERATURE r PH
DEG.C
24.5
24.5
24.5
24.5
24.5
25.0
24.5
24.0
24.5
25.0
27.0
24.5
24.5
24.5
25.0
24.5
24.5
24.5
27.0
24.5
24.5
24.5
24.5
26.0
25,5
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
24.5
24.5
7.7
7.7
7.6
7.6
7.6
7.6
6.9
7.6
7.7
7.7
7.7
7.6
7.7
7.7
7.7
7.7
7.7
7.7
8.4
7.7
7.7
7.8
7.7
7.7
7.7
7.7
7.8
7.7
7.8
7.7
7.7
7.7
7.7
7.7
7.5
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIArMG/L AMMONIAr MG/L UN-IONIZED AMMONIAr

-------
 UEEK

 DATE:   8/11/79
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SD
5E
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
90
9E
9F
10A
10B
IOC
100
10E
TIME
1400
1405
1410
1420
1430
1440
1550
1500
1505
151O
1512
1515
1520
1525
1530
1534
1538
1545
1620
1625
1627
1630
1635
1637
1640
1645
1647
1650
1653
1655
165B
1660
1665
1667
1700
TEMPERATURE, PH
DEG.C
24.1
24.6
25.3
24.3
24.4
24.5
24.6
24.4
24.1
24.4
25.8
24.9
24.6
24.7
24.7
24.8
24.5
24.6
26.4
24.8
24.7
24.7
25.0
26.2
25.3
25.0
25.0
24.8
25.0
25.1
25.0
25.0
25.0
25.1
25.0
7.3
7.4
7.4
7.5
7.5
7.5
8.5
7.4
7.4
7.6
7.4
7.4
7.6
7.7
7.4
7.3
7.5
7.5
6.9
7.5
7.5
7.4
7.1
7.5
7.5
7.4
7.5
7.5
7.5
7.5
7.3
7.2
7.4
7.5
7.5
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIAfMG/L AMMONIA. MG/L UN-IONIZED AMMONIAf
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.21
0.23
0.34
0.21
0.30
0.22
7.02
0.21
0.30
0.21
0.25
0.33
0.35
0.37
0.28
N/A
0.09
0.16
0.77
0.34
0.21
0.36
0.37
0.22
0.11
0.16
0.24
0.27
0.12
0.38
0.37
0.23
0.21
0.21
N/A
0.00225
0.00316
0.00485
0.00360
0.00502
0.00377
1.04562 STP
0.00278
0.00392
0.00454
0.00380
0.00460
0.00762
0.01005
0.00386
INSUFFICIENT DATA
0.00154
0.00283
0.00384 STP
0.00588
0.00370
0.00499
0.00263
0.00426
0.00193
0.00220
0.00422
0.00473
0.00218
0.00673
O. 00415
0.00206
0.00290
0.00381
INSUFFICIENT DATA
0.00231
0.00323
0.00495
0.00365
0.00507
0.00381

0.00276
0.00389
O. 00454
0.00380
0.00474
0.00798
0.01053
0.00404

0.00162
0.00296

0.00588
0.00370
0.00499
0.00263
0.00426
0.00193
0.00220
0.00422
0.00473
0.00218
0.00673
0.00415
0.00206
0.00290
0.00381

NOTE? * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5

      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                      WEEK  *49A


                      DATE:   8/14/79
ro
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
36
3C
4
5A
SB
5C
5D
5E
5F
SG
6
7A
78
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIME
1320
1330
1340
1350
1355
1400
1310
1420
1422
1425
1620
1428
1430
1433
1436
1438
1440
1445
1510
1512
1515
1518
1520
1523
1525
1530
1533
1536
1538
1540
1542
1544
1545
1548
1550
TEMPERATURE* PH
DEG.C
19.7
19.9
19.6
19.5
19,5
19.5
23.3
19.8
19.8
19.7
19.7
19.2
19.1
19.2
19.2
19.2
19.4
19.5
20.2
19.0
18.9
18.9
19.0
18.7
19.1
19.0
19.0
18.8
19.0
19,4
18.5
18.2
19.2
19.2
19.2
7,3
7.4
7,4
7.6
7.4
7.4
7.2
7.4
7,6
7.5
7.6
7,6
7.6
7,6
7.6
7.6
7.5
7.5
7.9
7.6
7.5
7.6
7,6
7.6
7.6
7.4
7.5
7.5
7.5
7.6
7.3
7.6
7.6
7.6
7.6
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIAr MG/L UN-IONIZED AMMONIA*
(NH3 AS N) 
-------
                     WEEK *49B

                     DATE:  8/18/7?
u>
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SO
5E
5F
SO
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
920
925
930
935
940
950
1005
820
822
825
827
830
833
835
837
840
845
850
725
727
730
732
735
737
740
742
744
746
748
750
752
754
756
758
800
TEMPERATURE* PH
HEG.C
16.6
16.4
16.3
16.1
16.1
16.4
22.0
16.5
16.8
16.6
16.5
15.8
15.8
15.9
15.8
15.8
16.0
16.0
17.3
16.3
16.3
16.9
16.5
16.2
16.3
16.5
16.5
16.4
16.4
16.1
15.3
15.4
15.8
16.0
16.1
8.1
7.9
8.1
8.0
8.0
7.9
7.0
7.7
7,6
7,6
7.9
7.8
7.8
7.7
7.5
7.7
7.8
7.8
7.3
7.8
8.0
7.9
7.8
7.9
7.9
7.9
7.9
8.0
7.9
7.8
7.6
7.5
7.9
7.8
7.8
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIA, MG/L UN-IONIZED AMMONIA*
(NH3 AS N) (NH3 AS N) MO/L (NH3 AS N)
0.12
0.16
0.12
0.19
0.19
0.07
12.81
0.16
0.14
0.25
0.1O
0.09
0.14
0.20
0.13
0.08
0.13
0.19
3.96
0.19
0.45
0.15
0.12
0.10
0.07
0.17
0.16
0.21
0.29
0.12
0.18
0.20
0.08
0.16
N/A
0.00431
0.00388
0.00452
0.00546
0.00546
0.00155
0.05858 STP
0.00236
0.00172
0.00310
0.00235
0.00163
0.00252
0.00286
0.00120
0.00118
0.00241
0.00346
0.02557 STP
0.00354
0.01326
0.00362
0.00218
0.00230
0.00173
0.00411
0.00391
0.00607
0.00679
0.00212
0.00200
0.00175
0.00186
0.00301
INSUFFICIENT DATA
0.00508
0.00458
0.00530
0.00641
0.00639
0.00181

0.00289
0.00210
0.00377
0.00349
0,00206
0.00317
0.00359
0.00151
0.00148
0.00299
0,00428

0.00426
0,01592
0.00435
0.00262
0.00298
0.00211
0.00500
0.00476
0.00737
0.00825
O.OO258
0.00243
0.00213
O.OO225
0.00365

                     NOTE:  *  INDICATES  UN-IONIZED  AMMONIA  CONCENTRATION IN  RIVER  GREATER  THAN  0.02  MG/L
                           AND  PH  GREATER  THAN  OR  EQUAL  TO 8.5
                           ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                           AND  PH  LESS  THAN  8.5
                           IF TEMPERATURE  LESS  THAN 5.0  DEGREES  C  THEN  UN-IONIZED AMMONIA CALCULATED AT 5.0  DEGREES

-------
WEEK *50A

DATE:  8/21/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
SA
SB
5C
5D
5E
5F
SO
6
7A
7B
7C
7D
B
?A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
950
955
1000
1005
1010
1015
1020
930
932
935
840
937
940
942
944
945
950
955
705
707
710
712
715
717
720
723
726
730
733
735
737
740
745
750
755
TEMPERATURE »
DEG.C
17.0
17.0
16.9
16.9
17. 0
17.0
21.8
17.0
17.0
17.2
15.7
16.2
15.9
15.8
15.8
15.9
16.0
16.1
17.0
15.9
16.2
16.1
15.9
15.5
16.1
16.1
16.2
15.9
16.6
17.2
14.3
14.9
16.4
16.4
17.2
PH
8.1
8.1
7.8
7.8
7.8
7.7
6.9
7.6
8.0
8.0
7.9
7.9
7.8
7,7
7.8
7.8
7.8
8.0
7.0
8.1
8.0
8.0
8.0
7.9
8.0
8.0
7.9
8.1
8.0
8.0
7.8
7.8
7.8
8.1
8.1
TOTAL
AMMQNIArMG/L
(NH3 AS N)
0.08
O.12
0.15
0.19
0.16
0.15
10.09
N/A
0.08
0.16
0.12
0.12
0.16
O.15
O.il
0.22
N/A
0.16
4.53
0.12
0.12
0.11
0.05
0.10
0.16
0.13
0.16
0.11
0.08
0.12
0.12
0.12
0.17
0.14
0.17
UN-IONIZED
AMMONIA, MG/L
(NH3 AS N)
0.00317
0.00475
O.OO289
0.00370
0.00308
0.00232
0.03616 STP
INSUFFICIENT DATA
0.00254
0.00489
0.00277
0.00287
O.OO284
0.00213
0.00193
0.00403
INSUFFICIENT DATA
0.00451
0.01438 STP
O. 00410
0.00359
0.00309
0.00140
0.00218
0.00475
0.00380
0.00363
0.00380
0.00246
0.00386
0.00186
0.00208
0.00325
0.00516
0.00675
TIME ADJUSTED
UN-IONIZED AMMQNIAf
MG/L 
-------
                    WEEK «50B


                    DATE;  8/25/79
o\
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
4
SA
SB
SC
50
5E
5F
5G
6
7A
7B
7C
7D
8
9A
96
9C
90
9E
9F
10A
10B
IOC
10D
10E
TIME
1030
1035
1037
1040
1045
1050
1100
1000
955
952
1010
950
945
940
935
930
927
925
745
747
750
755
757
800
803
805
808
810
815
820
825
830
835
837
840
TEMPERATURE* PH
DEG.C
17.8
17.9
18.2
17.6
18.3
17.9
21.8
18.6
17.8
17.1
16.7
16.5
16.3
16.2
16.8
17.0
16.9
17.3
17.8
17.1
17.0
17.0
17.2
16.0
16.6
16.9
17.0
17.4
17.7
17.7
15.1
15.0
17.0
17.4
17.0
8.1
8.0
8.0
8.0
8.0
8.0
6.8
8.1
8.1
8.1
7.9
7.9
8.0
7.8
8.1
8.0
7,9
8.0
7.0
8.1
8.0
8.0
8.1
7.9
7.9
7.8
7.9
7.9
7.9
8.0
7.6
7.7
7.9
8.0
7.9
TOTAL
AMMONIA»MG/L
(NH3 AS N>
0.04
0.14
0.04
0.07
0.13
0.07
10.89
0.12
0.08
0.10
0.06
0.06
0.08
0.12
0.12
0.07
0.07
0.14
3.99
0.13
0.14
0.21
0.17
0.07
0.13
0.06
0.07
0.08
0.11
0.07
0.05
0.06
0.07
0.15
0.07
UN-IONIZED TIME ADJUSTED
AMMONIAr MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L (NH3 AS N)
0.00168
0.00460
0.00138
0.00212
0.00446
0.00217
0.03101 STP
0.00497
0.00335
0.00383
0.00139
0.00137
0.00241
0.00214
0.00437
0.00228
0.00161
0.00441
0.01343 STP
0.00511
0.00431
0.00660
0.00675
0.00170
0.00315
0.00112
0.00162
0.00209
0.00277
0.00213
0.00054
0.00078
0.00182
0.00470
0.00162
0.00191
0.00522
0.00157
0.00240
0.00503
0.00244

0.00573
0.00388
0.00444
0.00187
0.00159
0.00282
0.00251
0.00515
0.00270
0.00192
0.00524

0.00607
0.00513
0.00783
0.00799
0.00217
0.00380
0.00136
0.00195
0.00251
0.00332
0.00255
0.00064
0.00093
0.00217
0.00558
0.00193
                    NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND PH GREATER THAN OR EGUAL TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L

                          AND PH LESS THAN 8.5                                                                 ___
                          IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                     WEEK *51A


                     DATEJ   8/28/79
OS
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5D
5E
5F
56
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1110
1115
1120
1130
1140
1145
1105
1325
1330
1335
1440
1340
1345
1350
1355
1400
1415
1215
1217
1220
1222
1224
1225
1227
1230
1232
1235
1237
1240
1243
1246
1248
125O
1255
TEMPERATURE* PH
DE6.C
21.6
21.4
19.2
19.2
19.2
19.4
23.0
22.3
21.3
21.7
21.8
20.5
20,5
21.2
20.6
21.2
21.2
23.4
23.0
22.3
23.5
23.5
23.2
22.3
22.3
22.3
23.2
22.8
23.5
22.2
22. 0
22.7
21,9
22.0
8.1
8.2
8.0
7.9
8.0
8.4
7.0
8.1
8.2
8.1
8.0
8.1
8.1
8.1
8.1
8.1
8.3
7.3
8.1
8.0
8.2
8.1
8.0
8.1
8.1
8.1
8.1
8.0
8.1
8.0
8.0
8.0
8.1
8.1
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIArMG/L AMMONIA* MG/L UN-IONIZED AMMONIA.
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N>
0.10
0.32
0.23
0.19
0.17
0.12
11.00
0.25
0.21
0.22
0.28
N/A
0.27
0.19
0.20
0.17
0.25
7.00
0.13
0.16
0.16
0.19
0.21
0.23
0.19
0.20
0.18
0.26
0.16
0.22
0.18
0.17
0.16
0.19
0.00525
0.02090 **
0.00831
0.00547
0.00624
0.01075
0.05400 STP
0.01376
0.01331
0.01189
0.01211
INSUFFICIENT DATA
0.01338
0.00979
0.00980
0.00894
0.02030 **
0.07021 STP
0.00770
0.00737
0.01233
0.01144
0.00980
0.01285
0,01055
0.01101
0.01073
0.01221
0.00995
0.00989
0.00795
0.00796
0.00893
0.01034
0.00583
0.02312 **
0,00922
0.00604
0.00685
0,01172

0.01433
0.01382
0,01233
0.01240

0.01357
0.00993
0.00996
0,00909
0.02067 **

i 0,00818
0.00784
0.01307
0.01213
O.O1O58
0.01380 •-
0,01133
0.01181
0,01148
0.01307
0,01063
0,01056
0,00848
0.00848
0,00951
O.O1099
                     NOTE:  * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                           AND PH GREATER THAN OR EQUAL TO 8.5
                           ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                           AND PH LESS THAN 8.5
                           IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES  C

-------
WEEK *51B

DATE:  v/  2/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SB
5E
5F
SO
6
7A
7B
7C
7D
8
?A
9B
?C
9D
9E
9F
10A
10B
IOC
10D
1OE
TIME
1050
1055
1100
1105
1110
1115
1045
945
947
950
1050
955
1000
1005
1010
1015
1020
1025
745
747
750
752
755
800
805
810
815
820
825
830
840
845
850
855
900
TEMPERATURE r PH
DE6.C
18.7
18.5
18.5
18.2
18.1
18.3
21.7
19.1
17.2
17.5
16.1
16.4
16.4
16.4
16.5
16.7
17.1
17.0
16.7
16.2
16.2
16.6
16.3
15.6
16.1
16.6
16.4
16.7
16.4
16.3
15.3
15.4
15.4
16.8
16.5
8.1
8.2
8.2
8.1
8.2
8.1
6.8
8.1
8.0
8.0
7.9
7.9
7.9
8.0
7.9
8.0
8.1
7.6
7.2
7.9
8.0
8.0
8.0
6.6
7.9
7.9
8.0
8.0
7.9
7.9
7.7
8.1
7.7
8.0
8.0
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIArMO/L AMHONIA» MG/L UN-IONIZED AMMONIA.
(NH3 AS N) (NH3 AS N) MG/L (NH3 AS N)
0.21
0.15
0.19
0.17
0.23
0.19
11.32
0.21
0.24
0.19
0.19
0.21
0.17
0.17
0.16
0.23
0.16
0.18
6.42
0.14
0.21
0.19
0.17
N/A
0.17
0.23
N/A
0.19
0.15
0.26
0.19
0.11
0.17
0.16
0.21
0.00930
0.00790
0.01010
0.00725
0.01195
0.00799
0.03202 STP
0.00919
0.00746
0.00605
0.00437
0.00485
0.00408
0.00510
0.00371
0 . 00695
0.00606
0.00226
0.03152 STP
0.00325
0.00598
0.00567
0.00506
INSUFFICIENT DATA
0.00399
0.00551
INSUFFICIENT DATA
0.00571
0.00349
0.00617
0.00262
0.00367
0.00241
0.00500
0.00612
0.01046
0.008B6
0.01129
0.00810
0.01330
0.00889

0.01067
0.00869
0.00703
0.00565
0.00562
0.00470
0.00584
0.00424
0.00788
0.00683
0.00255

0.00388
0.00713
0.00674
0.00602

0.00481
0.00664

0.00683
0.00418
0.00736
0.00312
0.00435
0.00286
0.00590
0.00720
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES

-------
                    WEEK *52A

                    DATE:  9/ 5/79
oo
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SO
5E
5F
50
6
7A
7B
7C
70
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1030
1O35
1037
1040
1045
1050
1100
900
905
910
1015
915
920
930
940
950
1000
1005
720
725
730
735
740
745
750
755
BOO
805
807
BIO
815
820
823
825
830
TEMPERATURE » PH
DEG.C
18.0
17.3
16.8
16.9
16.6
16.6
21.6
18.3
16.8
16.8
15.3
15.4
15.4
15.5
15.3
15.8
16.0
16.3
15.5
15.6
15.8
15.7
15.8
14.5
15.1
15.6
15.8
15.8
15.8
15.9
14.8
15.3
15.8
16.3
15.7
7.7
8.0
8.1
8.1
8.2
8.2
6.9
7.9
7.9
8.1
7.8
8.0
7.9
8.0
7.9
8.0
8.1
8.1
8.3
8.0
8.1
8.0
7.9
7.9
7.9
8.0
8.1
8.0
8.0
7.9
7.8
7.8
7.8
8.0
8.0
TOTAL
AMMONIA, MG/L
(NH3 AS N)
0.12
0.01
0.22
0.20
0.21
0.18
9.29
0.16
0.17
0.17
0.18
0.09
0.12
0.19
0.20
0.13
0.18
0.16
5.60
0.10
0.12
0.12
0.16
0.16
0.16
0.19
0.16
0.12
0.16
0.12
0.12
0.16
0.15
0.17
0.11
UN-IONIZED TIME ADJUSTED
AMMONIA t MG/L UN-IONIZED AMMONIA*
(NH3 AS N) MG/L (NH3 AS N)
0.00327
0,00026
0.00843
0.00755
0.00960
0.00844
0.03282 STP
0.00423
0.00420
0.00656
0.00314
0.00248
0.00252
0.00523
0.00430
0.00372
0.00648
0.00572
0.30072 STP
0.00275
0.00436
0.00346
0.00353
0.00321
0.00353
0.00527
0.00552
0.00325
0.00465
0.00281
0.00206
0.00271
0.00267
0.00506
0.00300
0.00373
0.00029
0.00957
0.00855
0.01083
0.00951
0.00504
0.00500
0.00777
0.00422
0.00299
0.00303
O.OO621
0.00506
0.00433
O.OO746
0.00655
0.00331
0.00523
0.00415
0.00423
0.00416
0.00429
0.00638
0.00666
0.00392
0.00560
0.00338
0.00249
0.00326
0.00320
0.00605
0.00358
                   NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                         AND PH GREATER THAN OR EQUAL TO 8.5
                         ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                         AND PH LESS THAN 8.5
                         IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                    WEEK *52B

                    DATE:  9/ 8/79
o\
VO
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3C
4
5A
SB
5C
5D
5E
5F
56
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1340
1345
1350
1355
1400
1415
1330
1600
1605
1715
1610
1615
1620
1625
1630
1640
1655
1435
1437
1440
1442
1445
1450
1455
1500
1505
1510
1514
1517
1520
1522
1525
1527
1530
TEMPERATURE* PH
DE6.C
22.8
22.5
21.5
20.9
20.9
20. 6
23.0
21.8
21.4
22.1
21.3
21.9
21.5
21.5
21.9
21.6
21.5
22.2
20.4
20.4
20.6
20.5
21.8
20.9
20.8
2O. 7
20.5
20.8
20.7
21.4
21.4
21.2
21.1
20.9
8.1
8.2
7.6
8.0
8.3
7.9
6.9
8.4
8.3
8.1
8.2
8.2
8.4
8.3
8.2
8.4-
8.2
7.2
8.4
8.4
8.2
8.4
8.0
8.4
8.3
8.3
8.2
8.2
8.4
8.0
8.0
8.1
8.4
8.4
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MG/L AMMONIA* MG/L UN-IONIZED AMMONIA*
(NH3 AS N> (NH3 AS N) MG/L (NH3 AS N>
0.21
0.12
0.24
0.21
0.21
0.17
11.52
0.12
N/A
0.16
0.08
0.14
0.18
0.12
0.28
0.20
0.14
7.75
0.14
0.16
0.24
0.20
0.16
0.14
0.14
0.24
0.14
0.17
0.16
0.14
0.07
0.16
0.13
0.14
0.01187
0.00808
0.00413
0.00837
0.01604
0.00551
0.04499 STP
0.01176
INSUFFICIENT DATA
0.00860
0.00532
0.00942
0.01812
0.01002
0.01885
0.01989
0.00917
0.05679 STP
0.01302
0.01456
0.01472
0.01851
0.00677
0.01346
0.01084
0.01836
0.00857
0.01080
0.01485
0.00589
0,00312
0.00851
0.01284
0.01346
0.01226
0.00833
0.00426
0.00859
0.01642
0.00561

0.01176

0.00860
0.00557
0.00986
0.01893
0.01048
0.01972
0.02078 **
0.00960

0.01313
0.01466
0.01481
0.01860
O.O0671
0.01364
0.01096
0.01854
0.00863
0.01087
0.01492
0.00591
0.00313
0.00853
0.01285
0.01346
                    NOTE:  *  INDICATES UN-IONIZED  AMMONIA  CONCENTRATION IN  RIVER  GREATER  THAN  0.02  MG/L
                          AND  PH GREATER  THAN  OR  EQUAL  TO 8.5
                          ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
                          AND  PH LESS THAN  8.5
                          IF TEMPERATURE  LESS  THAN 5.0  DEGREES  C  THEN  UN-IONIZED AMMONIA CALCULATED  AT 5.0  DEGREES  C

-------
 WEEK *53A


 DATE:  9/11/79
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
4
5A
SB
5C
50
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
100
10E
TIME
1040
1045
1050
1100
1110
1120
1125
930
935
940
1025
945
947
950
955
1000
1005
1O10
750
752
755
800
805
810
815
820
825
830
835
837
840
845
850
855
900
TEMPERATURE F PH
DEG.C
17.4
17.4
17.3
17.3
17.2
17.2
22.0
N/A
16.5
16.9
16.3
16.4
16.6
16.4
16.4
16.7
17.0
16.6
17.7
16.4
16.8
16.4
16.8
15.9
16.8
16.0
16.9
17.0
16.8
16.8
14.5
15.2
15.0
17.2
16.8
7.9
7.7
7.9
7.7
8.0
7.9
7.1
N/A
7.9
8.0
7.8
7.9
7.8
7.9
8.0
7.9
7.8
7.9
8.6
8.0
8.0
8.1
8.0
7.9
8.1
8.1
8.0
8.1
8.0
8.1
7.7
7.8
7.8
8.1
8.0
TOTAL UN-IONIZED TIME ADJUSTED
A?522IA.£MO/L AMMONIA, MG/L UN-IONIZED AMMONIA,
 MG/L (NH3 AS N)
0.10
0.06
0.02
0.07
0.05
0.09
7.71
N/A
0.07
0.04
0.03
0.06
0.05
0.05
0.07
0.01
0.04
0.04
3.24
0.01
0.08
0.02
0.04
0.05
0.01
0.05
0.02
0.04
0.02
0.02
0.02
0.02
0.01
0.05
0.05
0.0025*1
0.00093
0.00062
0.00119
0.00154
0.00226
0.04430 STP
INSUFFICIENT DATA
0.00176
0.00126
0.00062
0.00136
0.00094
0.00116
0.00194
0.00020
0.00081
0.00098
0.38157 STP
0.00024
0.00250
0.00061
0.00125
0.00112
0.00031
0.00177
0.00050
0.00158
0.00075
0.00094
0.00032
0.00028
0.00014
0.00193
0.00150
0.00284
0.00105
0.00070
0.00134
0.00172
0.00252


0.00206
0.00147
0.00082
0.00159
0.00110
0.00135
0.00225
0.00023
0.00093
0.00112

0.00029
0.00297
0.00072
0.00148
0.00143
0.00037
0.00212
0.00060
0.00188
0.00089
0.00111
0.00038
0.00034
0.00017
O.OO227
0.00177
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EQUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
WEEK «53B


DATEt  9/15/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
SA
SB
5C
5D
5E
5F
SB
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1350
1355
1400
1410
1415
1420
1340
1625
1627
1630
1635
1640
1642
1645
1650
1655
1700
1705
1450
1452
1455
1500
1505
1507
1510
1512
1515
1520
1525
1530
1532
1535
1540
1542
1545
TEMPERATURE t PH
DE6.C
17.3
16.9
16.0
15.6
15.6
15.8
21.8
19.5
18.1
18.2
19.3
18.4
18.0
17.6
18.4
18.1
17.8
17.9
19.8
17.9
18.0
18.1
18.4
18.5
17.8
17.5
17.5
17.2
17.3
17.5
IB. 6
18.3
18.3
17.6
17.4
8.3
8.3
8.3
8.3
8.2
8.2
7.0
8.3
8.2
8.2
8.2
8.4
8.2
8.2
8.4
8.2
8.4
8.4
8.0
8.3
8.3
8.4
8.3
8.2
8.2
8.3
8.4
8.3
8.3
8.3
7.9
7.8
7.7
8.3
8.3
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA.MG/L AMMONIA* MG/L UN-IONIZED AMMONIA*

-------
                    WEEK *54A

                    DATE:  9/18/79
ro
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
5D
5E
5F
5G
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1325
1330
1340
1350
1400
1405
1315
1545
1550
1555
1700
1600
1610
1615
1620
1625
1630
1640
1435
1437
1440
1442
1445
1450
1435
1455
1500
1502
1505
1508
1510
1513
1515
1518
1520
TEMPERATURE , PH
DEG.C
18.2
18.1
17.8
17.5
17.6
18.1
22.0
20.1
18.7
18.7
20.1
18.9
18.9
18.7
19.0
19.0
18.9
18.7
19.0
18.5
18.7
18.6
18.6
18.7
18.7
18.4
18.8
18.7
18.5
18.8
19.4
19.0
19,0
18.3
18.1
7.9
8.1
8.2
8.2
8.0
7.7
7.0
8.3
8.3
8.3
8.2
8.O
8.2
8.2
8.3
8.1
8.2
8.3
9.0
8.3
8.2
8.3
8.3
8.1
8.3
8.3
8.2
8.4
8.2
8.2
7.7
7.8
7.8
8.2
8.4
TOTAL
AMMONIA»MG/L

-------
                    UEEK 454B

                    DATE:  9/22/79
U>
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
SC
SO
5E
5F
56
6
7A
7B
7C
70
8
9A
9B
9C
90
9E
9F
10A
10B
IOC
100
10E
TIME
1325
1340
1345
1350
1400
1405
1305
1550
1555
160O
1710
1605
1610
1615
1620
1625
1630
1640
1445
1450
1452
1455
1500
1502
1504
1506
1508
1510
1512
1514
1516
1518
1520
1522
1525
TEMPERATURE* PH
DE6.C
18.3
N/A
17.7
17.7
18.1
18.1
22.3
20.7
18.9
19.0
20.3
18.9
18.9
19.0
19.0
19.0
18.6
19.0
18.7
18.4
18.5
18.1
18.5
18.5
18.3
18.3
18.5
18.5
18.1
18.4
19.1
18.9
18.9
18.1
19.1
7.6
N/A
7.8
7.8
7.7
7.8
6.8
8.1
8.0
8.1
8.0
8.0
8.0
8.0
8.0
8.1
8.0
8.0
7.8
7.7
7.8
7.9
7.9
7.9
7.9
7.9
7.9
8.0
8.0
7.8
7.6
7.8
7.8
7.9
8.1
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIA»MB/L AMMONIA. MG/L UN-IONIZED AMMONIAt

-------
WEEK *55A


DATEt  9/25/79
STATION
NUMBER
1A
IB
1C
ID
IE
IF
2
3A
3B
3C
4
5A
SB
5C
SD
5E
5F
50
TIME
1400
1405
1410
1420
1425
1430
1350
1520
1522
1525
1530
1533
1535
154O
1544
1550
1555
1605
TEMPERATURE , PH
DEG.C
18.2
18.0
17.3
17.3
17.1
17,4
22.8
19.1
N/A
N/A
19.0
18.8
19.0
18.9
19.2
18.7
18.5
18.9
8.2
8.2
8.2
8.2
8.1
8.2
7.0
8.3
N/A
N/A
7.9
8.2
8.2
8.2
7.9
8.2
8.1
8.2
TOTAL UN-IONIZED TIME ADJUSTED
AMNONIA»MG/L AHHONIAt MG/L UN-IONIZED AMMONIA?
(NH3 AS N> (NH3 AS N) MG/L (NH3 AS N>
0.13
0.10
0.09
0.10
0.13
0.16
11.52
0.12
N/A
N/A
0.10
0.11
0.16
0.16
0.16
0.18
0.12
0.19
O. 00688
0.00509
0.00444
0.00484
0.00511
O.OO813
0.05578 STP
0.00852
INSUFFICIENT DATA
INSUFFICIENT DATA
0.00281
0.00583
0.00864
0.00903
0.00475
0.00979
0.00529
0.01038
0.00705
0.00520
0.00453
0.00491
0.00517
0.00821

0.00852


0.00281
0.00611
0.00905
0.00946
0.00499
0.01026
0.00555
0.01088
NOTE: * INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH GREATER THAN OR EOUAL TO 8.5
      ** INDICATES UN-IONIZED AMMONIA CONCENTRATION IN RIVER GREATER THAN 0.02 MG/L
      AND PH LESS THAN 8.5
      IF TEMPERATURE LESS THAN 5.0 DEGREES C THEN UN-IONIZED AMMONIA CALCULATED AT 5.0 DEGREES C

-------
                      WEEK 4550

                      DATE:  9/29/79
Ol
STATION
NUMBER
1A
IB
1C
10
IE
IF
2
3A
3B
3C
4
5A
SB
SC
5D
5E
5F
50
6
7A
7B
7C
7D
8
9A
9B
9C
9D
9E
9F
10A
10B
IOC
10D
10E
TIME
1330
1340
1345
1350
1355
1400
1320
1600
1605
1610
1415
1615
1620
1625
1630
1640
1645
1650
1445
1447
1450
1455
1500
1502
1505
1507
1509
1512
1514
1516
1518
1520
1522
1523
1525
TEMPERATURE* PH
DEG.C
17.4
17.1
16.3
16.2
16.3
16.8
21.5
17.4
17.2
17.2
17.9
17.2
17.2
17.3
17.3
17.3
17.0
17.1
18.6
17.0
17.2
17.2
17.7
18.8
17.7
17.3
17.2
17.2
17.1
17.5
18.3
18.4
17.9
17.1
17.2
7.6
7.7
7.6
7.6
7.7
7.7
6.3
8.0
8.1
8.O
7.9
8.O
7.9
7.8
8.0
8.0
8.0
7.9
8.2
7,8
7.9
7.6
7.1
7.9
7.9
7.6
7,7
7.9
7.9
7.8
7.9
7.7
7.7
7.7
7.9
TOTAL UN-IONIZED TIME ADJUSTED
AMMONIArMG/L AMMONIA? MG/L UN-IONIZED AMMONIA?
 MG/L 
-------
                  APPENDIX B
          ADDITIONAL HYDROLOGIC DATA

 Table B.I  USGS and LRCWE Discharges

Figure B.I  Rating Curve for Colorado River
              at Broadway Bridge
Figure B.2  Rating Curve for Colorado River
              at Hwy. 340 near Fruita
Figure B.3  Discharge vs. Gauge Height, Persigo
              Wash at Interstate 70
Figure B.4  Discharge vs. Gauge Height, Little
              Salt Wash at U.S. Hwy. 6
Figure B.5  Rating Curve for V-Notch Weir at
              Fruita Lagoon
Figure B.6  Colorado River at Persigo Wash,
              North Channel
Figure B.7  Rating Curve for North Channel,
              Colorado River Upstream of
              Persigo Wash
Figure B.8  Colorado River Flows Upstream of
              Persigo Wash

-------
                          Table B.la
                USGS AND LRCWE DISCHARGES
                  Converted from cfs
         USGS (1)
LRCWE
USGS  (1)

Colorado River Gunnison River
near Cameo - near Grand Jet.
Date mVs mVs
9/07/78 49 (2) 31 (2)
10/10/78 48 (3) 38 CO
11/13/78 55 (5) 28 (6)
12/11/78 - 62 (8)
1/22/79
2/15/79
3/12/79
4/09/79
5/15/79
6/12/79
7/17/79
8/14/79
8/22/79
8/29/79
9/05/79
9/12/79
9/19/79
9/26/79
NOTES:
(1) Preliminary data, except where noted
(2) Published data
(3) 10/11/78 - gauged
(4) 10/04/78 - gauged
(5) 11/14/78 - gauged
(6) 11/15/78 - gauged
(7) Estimated
(8) 12/13/78 - gauged
Broadway
Bridge
(gauged)
mVs
30
25
100
-
90
125
120
135
235
505
240
55
95
60
40
50
50
50









Highway 340
near Fruita
(gauged)
m3/s
40
50
115 (7)
-
no
150
140
160
275
510
270
85
120
90
75
80
75
75










Colorado River
near State Line
m3/s
69 (2)
67
142
89 (8)
-
-
150
200
300
566
200
101
142
114
93
96
105
105









Leonard Rice Consulting Water Engineers, Inc.
                                 179

-------
                                        Table  B.lb

                             USGS AND LRCWE  DISCHARGES
                        USGS  (1)

            Colorado  River    Gunnison  River
                 USGS  (1)
near Fruita   Colorado River
        LRCWE
Broadway   Highway 340
 Bridge

Date
9/07/78
10/10/78
11/13/78
12/11/78
1/22/79
2/15/79
3/12/79
4/09/79
5/15/79
6/12/79
7/17/79
8/14/79
8/22/79
8/29/79
9/05/79
9/12/79
9/19/79
9/26/79
near Cameo
cfs
1730 (2)
1700 (3)
1950 (5)
•
-
-
-
-
-
-
-
-
-
-
-
-
-
-
near Grand Jet. (gauged)
cfs cfs
1100 (2) 1000
1330 (4) 900
973 (6) 3500
2180 (8)
3200 (7).
4500
^300
4700
8300
17800
8400
2000
3300
2100
1400
1700
1800
1800
(gauged)
cfs
1500
1700
4000 (7)
-
3900
5400
4900
5700
9800
18000
9500
3000
4300
3200
2600
2700
2700
2600
near State Line
cfs
2440
2380
5030
3125
-
-
5280
7070
10600
20000
7050
3580
5020
4o4o
3290
3400
3690
3710

(2)


(8)














NOTES:
(1)  Preliminary data, except where noted
(2)  Published data
(3)  10/11/78 - gauged
(4)  10/04/78 - gauged
(5)  11/14/78 - gauged
(6)  11/15/78 - gauged
(7)  Estimated
(8)  12/13/78 - gauged
             Leonard Rice Consulting Water Engineers. Inc.
                                            180

-------
                               FIGURE B.I .


                           RATING CURVE FOR

                  COLORADO RIVER AT BROADWAY BRIDGE
S
it


1

14,000-
12,000-
|0,000-
8,000
,OO<
4,000
2,000-
i





A
_ 0~









I

I

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| :

t


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\
t



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*r~
\






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UPSTREAMG.

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, i
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i : !


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UGE













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f A
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. . . .

	
5 8 §
O O O
DISCHARGE, m3/s

°5r5 60 65 70 5 8.0 8.5~
UPSTREAM GAUGE HEIGHT, fett
.0 2.0 3.0 4.0
DOWNSTEAM GAUGE HEIGHT, f«tt
/\\ Leonard Rice Consulting Water Engineers, Inc. 392ENSOI
                                   181
                                                            NOV. 1979

-------
                               FIGURE B.2 .
                            RATING CURVE FOR

                 COLORADO RIVER AT HWY. 340 NEAR FRUITA
M

U


la
o
o
w
14,000
12,000
10,000-
8,000-
6,000
4,000
2,000-

0







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,

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. . .





1 . .














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0 /'•
;/©'

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ss
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. . . .



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'•0 2 3
GAUGE HEIGHT, feet
/\\ Leonard Rice Consulting Water Engineers he
^\f _ ^ _ _ • 392ENSOI
NOV. 1979


300
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<
X
u

-------
                               FIGURE  B.3 .

                       DISCHARGE VS. GAUGE HEIGHT

                  PERSIGO WASH AT INTERSTATE 70






I?O




ino




flO-


w
0

o6
ff
<
0
5
ACl-
tw



or\-





0,
\

•
	 _

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i ! ! !









.X

Jb®^



	 .. .

— . 	 . 	 	



















I ; ;




/
/
s
/
Z-



i.


- . . . . .

.._... . .. .














/
~L
f
L
/
J
%
r

_^^
^
^
/























0


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. . . .





ja
*
















-








3


-4O







-3.0








-2.0^
ro
11 1
O
o-
<
o
5


-1.0



-




§
/•*T\
                      GAUGE HEIGHT (FEET)

Leonard Rce Consulting Water Engineers. Inc
^•^•—••^fc—•^^••••^ta-i'1^"—«*^—«"^^—«^^—ii^^_rf^^—^ta—^^^^
                              183
                                                                   392ENSOI
                                                                   NOV. 1979

-------
                         FIGURE  B.4
                DISCHARGE VS. GAUGE  HEIGHT
            LITTLE  SALT WASH AT U.S. HWY. 6






IPO-




IOH-




80-


CO
o
uJ 6O-
CD
(t
<
X
O
(/)
5
4O-




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*
, . . .





































	 .

•








•










1 i :
1 T " V ' '











l.(


- - •- - - - -





















i 1 •




/
/
/

a/
S
/

3


•
i ......

• • • -













^ 3

/

/
7_
/
/
j?
/
/•








2.(






•
/
I
/
/
/
/
r
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k
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r






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D


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-








3.


-40







-3.0








2.0^
•0
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O
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Q


.0








3
                     GAUGE HEIGHT  (FEET)
Leonard Rice Consulting Water Engineers, he
                                                         392CNSOI
                           184
                                                          NOV. 1979

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                                   FIGURE  B.5
                               RATING CURVE  FOR
                       V-NOTCH WEIR AT FRUITA  LAGOON
  1.6
 1.4
 1.2
 1.0
 «.
l»>
 u
 p
U)

a

T
O
01
 0.8
0.6
0.4
0.2-
               O
                                                      I
                           0.4          O.6          0.8
                                GAUGE HEIGHT, feet
                                                                   -.040
                                                                               .030
                                                                        (9
                                                                        iT
                                                                        
Leonard Rice Consulting Water Engineers. Inc
                                                          392ENSOI
                                        185
                                                           NOV. 1979

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                                           FIGURE  B.6
                               Colorado  River at  Persigo  Wash
                                          North Channel
                                       Looking Downstream
      ISLAND
00
            SCALES  Vertical l"=2'
                    Horizontal  t"= 40'
Leonard Sice Consulting Water Engineers. Inc
                                                               NOVEMBER 1979
                                                               392/ENS/OI

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                                        FIGURE  B.7
    80OO
    7000
    6000
    5000
   4000
a
*
o
   3000
   2000
    1000
5
               RATING CURVE FOR NORTH CHANNEL  COLORADO  RIVER
                              UPSTREAM OF PERSI60 WASH
                    4.0          3 0         2'.0          LO           0
                       DISTANCE BELOW BENCHMARK ELEVATION, feet
                                                                                   250
                                                                           200
                 Leonard Rice Consulting Watet Engineers Inc
                                                                          392ENSOI
                                            187
                                                                          NOV. 1979

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                                                             300
18000
                                                                        -500
                                                FIGURE B.8
                                         COLORADO RIVER FLOWS
                                      UPSTREAM OF PERSIGO WASH
                                     TOTAL RIVER VS. NORTH CHANNEL
             2000
4000       6000       8000        10000
  COMPUTED NORTH CHANNEL DISCHARGE, cf •
                                    188

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        APPENDIX C

  SAMPLE CALCULATION FOR
AMMONIA LOADING ALLOCATIONS

-------
                              APPENDIX C

                        SAMPLE CALCULATION FOR
                      AMMONIA LOADING ALLOCATIONS
     For the month of November, representative background conditions  for
Grand Junction are:
                   Temperature        = 10°C
                   pH                 = 8.3
                   Background         =0.18 mg/1
                     Total Ammonia
                   Flow (whole river) = 67,700 1/s
At this temperature and pH, 3.58 percent of the total ammonia is in the
un-ionized form on the basis of equilibrium relationships.  Thus, if  the
concentration of un-ionized ammonia is at the maximum (equal to the EPA
criterion of 0.02 mg/1), then the total ammonia would be 0.56 mg/1.  This
is the maximum allowable in-stream concentration of total ammonia under
these conditions.
     The permissible ammonia loading rate is then determined as follows:
     (Maximum in-stream ammonia - Background ammonia) x (Flow), or
         (0.56 mg/1 - 0.18 mg/1) x (67,700 1/s) = 25,726 mg/s
or about 2,200 kg/day.
                                    191

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   APPENDIX D




DYE TRACER STUDY

-------
                              APPENDIX D
                           DYE TRACER STUDY

BACKGROUND
      As part of the ammonia toxicity study, a bio-degradable fluo-
rescent dye was Injected into two tributary washes to determine mixing
patterns in the river during summer low-flow conditions.  The locations
of the dye injections were chosen to approximate the proposed sites for
future wastewater discharges of the two cities.  The dissolved dye can
be reasonably assumed to simulate the behavior of ammonia present in
wastewater effluent, and the resulting mixing characteristics will be
used to predict the dilution patterns of ammonia.

PROCEDURE
      On 9 and 10 August 1978, Rhodamine WT dye was pumped continuously,
at a constant rate, respectively, into Little Salt Wash and Persigo
Wash.  When the dye was completely mixed in the wash and the dye plume
had achieved a steady-state condition in the river, after about 45
minutes, water samples from the river were measured for fluorescence at
various downstream locations.  Grab samples were collected along
transects across the river, from the boat and by wading.  Water temper-
atures were also measured, and visual observations were noted.  A
fluorometer and generator were carried on board the boat so that samples
could be measured immediately following collection.  Calibration measure-
ments were performed periodically using prepared solutions of known
Rhodamine concentrations to insure accuracy of data.  Aerial photography
                                    195

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  was  conducted  simultaneously on both days  for  concurrent qualitative
  assessment of  the mixing zones.
  Resolution of  Data
       There were a few minor differences in the two dispersal studies.
  At Little Salt Wash, dye was injected at about one half the concentra-
  tion of that used at Persigo Wash and for  twice the length of time.
  Farthest downstream sampling locations were about 4,200 m (13,000 ft)
  from the mouth of Little Salt Wash, compared to about 2,400 m (7,500
  ft) for Persigo Wash.  Also, aerial photographs were taken at a higher
 altitude—and lower resolution—for Little Salt Wash.  The effort at
 Little Salt Wash served to refine details of procedures used the next
 day at Persigo Wash.   Thus, data for Persigo Wash are more detailed
 and have higher resolution than those for Little Salt Wash.

 DISCUSSION
       On the  basis  of fluorometer readings  and  calibration data, dilu-
 tion  of  dye at  downstream  locations  was  calculated,  as shown on Tables
 D.I and  D.2.  All dilutions were  determined relative to the  concentra-
 tion  of  dye in  the completely mixed  water flowing  from the wash.  For the
 Persigo  Wash  study, dilutions ranged from 1 to  400;  for the  Little Salt
 Wash  study, dilutions ranged from  1  to 100, since  dye  was  injected at a
 lower concentration.  However,  for both  studies, values approaching the
 highest  dilution are not precise due to  increasing effects of background
 interference caused by factors  such  as river turbidity and slight  vari-
 ations in on-board power which  resulted  in  instrument  fluctuations.
      Aerial photographs were used to interpolate  between data points
 as well as to provide an approximate large-scale representation  of the
 river.  Superimposing the calculated dilution values on  tracings of  the
 aerial photographs produced graphic  representations of  the dye plumes
 for each study, as portrayed in Figures D.I and D.2.  Dilution ranges  are
shown in bands, and the path of the dye can be easily traced, especially
at critical points where the river separates into more than one channel.
                                  196

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                                           TABLE D.I


                       COLORADO  RIVER  DILUTIONS DOWNSTREAM
                                     OF PERSIGO WASH
                         (DYE  TRACER STUDY—10  AUGUST  1978)

Fluorometar  readings and calculated  concentration* and  dilutions of Rhodanine WT dye are pre-
sented.   Dye was continuously Injected into Persigo Wash for approximately 2 hours, and grab
•anplea  were collected and measured  for  fluorescence when a steady-state condition was achieved.
Calibrations were made using dye solutions of known concentrations in the same range as the sam-
ples.  Concentrations and dilutions  were calculated as  follows:

                               C •  Cc Se . F
                                   Fc     S"
where C
F
S
Cc
Fc
Sc
D
sample concentration in ppm
sample fluorometer reading
sample instrument scale
calibration concentration in ppm
calibration fluorometar reading
calibration instrument scale
river dilution
Co concentration at mouth of wash - 0.120 ppm
Station Fluorometer Inatr. Calibration Cone.
Transect (ft. from no. Observation* Reading, Scale, Ratio, in ppm
river bank) F S CcSc/Fc ~C
0 - Distinct pink 42* 3 C0.010) (3)/35 0.120
plume 20' wide,
current slower
near no. bank








Dilution
'D
1



    2A
    2B
    2 1/2
10

20
40
60
70

10
20
30
40
50
60
70
80

10
20
30
40
60
80

90

10
                      Samples by wad-
                      ing/swimming
                      Ho. branch
                      sampled by wa-
                      ding.  Most of
                      dye segregated
                      within SO' from
                      no. bank
                      So. branch,
                      camp. 24*C

                      Middle of flow

                      River width
                      100'
         Sampled by
         wading
36*

42
17
 8
 8

57
44
37
41
54
67
38
29

15
12
10
10
10
14

14

47
                                                     1
                                                    10
                                                    30
                                                    30
 1
 1
 3
10
30
30
30

30
30
30
30
30
30

30
             11          0.103       1.2

             "          0.036       3.3
                        0.001      82.3
        (0.001)(30)/32   0.000     480.0
             "          0.000     480.0

        (0.100HD/93    0.061       2.0
                                                            (0.001)(30)732
        (0.100)(1)/90
0.047
0.040
0.015
0.006
0.002
0.001
0.001
0.001
0.000
0.000
0.000
0.000
0.000
0.000
0.052
2.5
3.0
8.2
20.7
57.1
100.0
133.3
240.0
320.0
384.0
384.0
384.0
274.0
274.0
2.3
                                             197

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                                  TABLE D.  1  (continued)
Transact






3













4

















3










Station Fluorometer Inatr.
(ft. from no. Observation* Reading. Scale,
river bank) F s
20
30
40
SO
60
70
10


20
30
40
50
60
70
80
90
100
no
120
10
20

30
40
50
60
70
80
90
100
110
120
130.
140
160
180

10
20
30
40
SO
60
70
80
90
100
110
40
35
30
i 3l
21
26
River widens w/ 32
SOB* preferential
channels
33
33
29
31
29
23
18
67
91
55
46
.
Sluggish wa- 43
ter, stagnant ,
tamp. 24'C
41
45
31
33
41
42
45
26
56
13
16
9
River 200' 7
wide
27
14
Temp.24.2*C 18
U
38
27
27
17
Temp. 23*C 13
14
13
1
1
1
3
10
30
1


1
1
1
1
1
1
1
1 10
10 •
10
10
_
3

10
10
10
10
10
10
10
10
30
30
30
30
30
30

3
3
10
10
30
30
30
30
30
30
30
Calibration
Ratio,
CcSc/Fc
If
II
If
ft
ft
(0.001)(30)/28
(0.100)(1)/90


It
ft
It
ft
If
If
If
It
It
It
i II
-
It









(0.001) (30) /28
It
II
II
ft
II

(0.100XD/90
ff
It
n
(0.001) (30)/28
it
If
It
If
n •
If
Cone.
In ppm
C
0.044
0.039
0.033
0.011
0.002
0.001
0.035


0.037
0.037
0.032
0.034
0.032
0.025
0.020
0.007'
0.010
0.006
0.005
-
0.016

a. 006
0.003
0.005
0.003
0.004
0.005
0.003
0.005
0.001
0.002
0.001
0.001
0.000
0.000

0.010
0.005
0.002
0.001
0.001
0.001
0.001
0.001
0.000
0.001
0.001
Dilution
D
2.7
3.1
3.6
10.5
51.4
129.2
3.4


3.2
3.2
3.7
3.5
3.7
4.7
6.0
16.1
11.9
19.6
23.5
-
7.5

20.3
26.3
• 24.0
34.8
30.9
26.3
25.7
24.0
129.0
60.0
224.0
210.0
373.3
480.0

12.0
23.1
60.0
98.2
38.4
124.4
124.4
197.6
238.5
240.0
224.0.
*Actual sample lOx mere concentrated
NOTE:  Concentrations are expressed to  three significant figure*, although dilutions are calcu-
lated from more precise figures.
                                           198

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                                         TABLE  D.2


                              COLORADO RIVER  DILUTIONS
                          DOWNSTREAM OF  LITTLE SALT  WASH
                         (DYE TRACER STUDY—9 AUGUST 1978)


Fluorometer readings  and calculated concentrations and dilutions of Rhodaalne HI dye are pre-
sented.  Dye was continuously Injected into Little Salt Wash for approximately 4 hours, and
grab samples were collected and measured for fluorescence when  a steady-state condition was
achieved.  Calibration* were made using dye solution* of known  concentrations In the same range
as the samples.  Concentrations and dilutions were calculated as follows:

C - Cc
Sc . F




Fe S
D - Co
C
where C sample concentration la ppm
F sample fluorometer reading
S sample instrument scale
Cc calibration concentration in ppm
Fc calibration fluorometer reading
Sc calibration -instrument scale
D river dilution
Co concentration at mouth of
Transect Station

0



1 10
23
SO
100
150
2 5


23
30
100

200
230
275
3A 10

20

40

3B 15


30
45
4 5
A
B
C
Observations

Distinct pink
path, about
20' wide,
teap. 23*C



Kid-river

North bank cur-
rent much slow-
er


River about
300' wide



North channel
temp. 22*C
1/3 of channel
width
2/3 of channel
width
South channel.
rapid flow.
shallow


Temp. 23. 5*0
1/4 river
Mid-river
3/4 river
Fluorometer
Reading,
F
63



47
38
6
6
7
80


33
10
6

7
8
8
81

87

88

37


13
6
68
53
21
12
Instr.
Scale,
S
1



3
10
10
10
10
10


10
10
10

10
10
10
30

30

30

10


10
10
30
30
30
30
wash • 0.057 ppm
Calibration
Ratio,
CcSc/Fc
C0.020)(3)/66



it




(0.02)(3)/66


II
11
(t

If
II
II
(0.001) (30) /33

it

ii

(0.02H3)/66


it
ii
(P.001)C30)/33
ii
n
ii

Cone.
in ppm
C
0.057



0'.014
0.003
0.001
0.001
0.001
0.007


0.003
0.001
0.001

0.001
0.001
0.001
0.002

0.003

0.003

0.003


0.001
0.001
0.002
0.002
0.001
0.000

Dilution
D
1



4.0
16.6
105.0
105.0
90.0
7.9


19.1
63.0
105.0

90.0
78.8
78.8
23.3

21.7

21.5

17.0


48.5
105.0
27.8
33.7
90.0
137.5
                                             199

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                                  TABLE D.2  (continued)
Transect
5


6



7



Fluoroaeter Instr.
Station Observations Reading, Seal*,
F S
A
B
C
A

B

A

B




Upstream of
snail channel
Mouth of small
channel
Vest side of
north channel
East side of
south channel
46
24
18
11

11

35

31

30
30
30
10

10

30

30

Calibration Cone .
Katio, in ppm
CcSc/Fc C
" 0.001
" 0.001
" 0.001
0.001

" 0.001

" 0.001

0.001

Dilution
D
41.1
78.8
105.0
44.8

44.8

54.0

61.0

NOTE:   Concentrations are expressed to three  significant figures, although dilutions are calcu-
lated  from more precise  figures.
                                          200

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      At Persigo Wash, complete mixing with the river water occurs at
about 2,300 m (7,000 ft) downstream of the wash.  Dyed water from the
wash enters the river from the north and remains in a narrow band,
segregated from the main flow of the river for the first 200 m (600 ft).
Visually, the dye appears to "hug" the north bank of the river.  Very
little mixing occurs in this zone.  At this point, Pritchard Wash
(smaller than Persigo) enters the Colorado River, and the band of dye-
influenced water widens from about 10 m to 20 m (30 ft to 60 ft).
Dilutions in the 20-m (60-ft) band range from 2- to 20-fold.  At 400 m
(1,300 ft) downstream from Persigo Wash, an island separates the river
into two channels.  The dye continues to hug the north bank of the
north channel with a 2- to 50-fold dilution, and virtually none of the
dye passes into the south channel.  At the downstream end of the
island, about 800 m (2,500 ft) away, the dye passes through a narrow
point in the north channel.  Beyond the island, Hunter Wash, which is
larger than Persigo Wash, enters the river and mixing occurs fairly rap-
idly from this point onward.  Dilutions greater than 20-fold are achieved
for 90 percent of the river width in the next 600 m (1,800  ft).  Mixing
can be considered complete for all practical purposes before the next  set
of islands at 2,300 m (7,000 ft) downstream of Persigo Wash.
      At Little Salt Wash, mixing is essentially complete at 1,500 m
(4,500 ft) downstream from the wash.  In this reach of the Colorado
River, there are fewer islands to obstruct mixing, and Big Salt Wash
contributes a significant volume of water which accelerates dilution.
Again, the dye plume exhibits very little mixing with the main flow in
the initial 600 m  (1,800 ft), with a 5-ro (15-ft) band of less than 10-
fold dilution.  At the mouth of Big Salt Wash, increased mixing is
visually evident;  and only 100 m (300 ft) downstream of Big Salt Wash,
the dye path extends across more than one half the river width (about
120 m) with dilutions greater than 20-fold.  Complete mixing occurs at
points 700 m (2,100 ft) farther downstream.
      The results  of the dye tracer study help predict the mixing be-
havior of ammonia  from wastewater discharges during the critical months
                                    201

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of summer low flow.  Areas in the river where minimal mixing occurs
will have to be considered in establishing discharge concentrations of
ammonia.  This would assure a safe habitat for the endangered fishes
throughout the river width.  In addition, these results may also serve
as a basis for recommendation of an outfall-diffuser which could pro-
vide faster and greater dispersion than the natural flow of the washes
into the river.
                                  202

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                                                        FIGURE D.I
                                        DILUTION  ZONES OF
                                        RHODAMINE  WT  DYE
                                     FROM PERSIGO  WASH INTO
                                       THE COLORADO  RIVER
LEGEND

  1  • 10  DILUTION
 10  - 50  DILUTION
 50  - 100 DILUTION
  >100 DILUTION
  ISLAND
  TRANSECT
SCALE
1 :  12,000
                                                ,2-1/2
                                                     .2 A
                                                         
-------
LEGEND
    1-10  DILUTION

   10 - 50  DILUTION

    >50  DILUTION

   ISLAND

   TRANSECT
   DILUTION  ZONES OF
   RHODAMINE  WT DYE
 FROM LITTLE  SALT WASH
INTO THE  COLORADO RIVER

-------
    APPENDIX E




INTENSIVE SURVEYS

-------
                              APPENDIX E
                          INTENSIVE SURVEYS

INTRODUCTION
      To establish diurnal variations of the concentration of un-
ionized ammonia, repeated water sampling was conducted throughout the
course of one day at critical locations.  These repeated samplings, or
intensive surveys, were performed twice during the thirteen-month study
period—once each during the summer and winter low-flow periods—to
look for any correlations as well as to determine seasonal differences
in the diurnal patterns.

PROCEDURE
      Intensive surveys were conducted at two locations:  (1) in the
vicinity of the proposed Grand Junction wastewater treatment facility,
Stations 3, 4 and 5; and (2) in the vicinity of the existing and
proposed-to-be-expanded wastewater treatment facility at Fruita,
Stations 7, 8 and 9.  Stations 4 and 8, located at Persigo Wash and
Little Salt Wash, respectively, represent the receiving waters for the
treated effluents as well as agricultural runoff; Stations 3 and 7 are
upstream locations on the river; and Stations 5 and 9 are on the river
downstream of the washes.
      For both the summer and winter intensive surveys, flow was gaged
once at each site, and all water samples were analyzed for pH, tempera-
ture and total ammonia.  These data enabled the calculation of concen-
trations of un-ionized ammonia at all sampling sites throughout one day
during the low-flow periods.
                                    207

-------
      Timing of the low-flow periods for the current year was deter-
mined in two steps.  First, stream gaging records for the Colorado
River near Cameo, 38 km (24 mi) upstream of the study area, and near
the Utah state line, 45 km (28 mi) downstream, were analyzed for the
water years 1951 to 1976; average timing and expected trends were thus
established.  With this information, the second step was to measure
daily river stage during the expected weeks of low flow and to watch
closely the declining river stage measurements.  The time at which the
river stage rose for two consecutive days was considered to be an ac-
curate indication of the low-flow period.
SUMMER LOW FLOW
Historical Records
      The following are summaries of trends indicated during an analysis
of historical records.
      (1)  Summer low flows are not very distinct at the Cameo gage.
           Generally the low appears as a small dip in a generally
           declining seasonal discharge.  The average low-flow date
           is 1 September..
      (2)  Summer low flows are more distinct at the gage near the
           Utah border, but still they are not as noticeable as in
           the winter.  The average date is 12 September.  The
           later date is attributable to delayed irrigation return
           flows and to the influence of the Gunnison River.
      (3)  There is a general relationship between the accumulation
           of winter snowpack and the timing of the summer low
           flows.  With greater snowpack and the resulting greater
           runoff volume, the spring runoff lasts longer and the
           low-flow date tends to occur later.  With less snowpack
           and the resulting lower runoff volume, the spring run-
           off does not last as long and the low-flow date generally
                                   208

-------
           occurs earlier.  The relation is not well defined,
           and it is affected by average temperatures.
      (4)  The snow melt which accumulated prior to the 1978
           runoff season in the Colorado River Basin was above
           average.  The Soil Conservation Service estimated
           that the April to September runoff near Cameo would
           be 122 percent of average.
      (5)  Summer low flows do not remain low over an extended
           period of time.  In the analysis of the flows one
           week on either side of the low-flow date for the
           gaging station near the Utah state line, flows
           averaged 33 percent higher than the low-flow date
           for the week before and 40 percent higher for the
           week after.

Results
      From daily river stage measurements taken from 23 August to 7
September 1978 at the Grand Avenue Bridge in Grand Junction, the 1978
summer low-flow period was determined to occur at about 5 to 8
September.  Since this coincided with the start of the thirteen-month
monitoring program, the summer intensive survey, conducted on 7 and 8
September, unfortunately, served as the test run for the sampling pro-
cedures.  An unexpected electrical storm on the afternoon of the first
day, together with inexperience with local river conditions, resulted
in the acquisition of only two sets of samples rather than the planned
six.  Nevertheless, morning and afternoon samples were obtained at the
required sites for the intensive survey, and flows were measured as
planned.  Collected water quality data are shown under Week Number 1 in
Appendix A, and measured flows for each station are presented in Section
3.
      At all stations, water temperatures increase from morning to after-
noon, as expected.  River temperatures vary from about 2.0 to 2.5°C from
8:00 a.m. until 7:00 p.m.; temperatures in Persigo and Little Salt washes
show greater variation than in the river  (about 4°C), due to smaller
                                    209

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flows.  Measurements of pH vary from 0.1 to 0.2 pH units, with similar
variations in both the washes and the river.  Variations in total
ammonia  concentration are not as consistent as those in temperature
and pH.  In general, concentration of total ammonia increases from
morning to afternoon in the washes (Stations 4 and 8) and at the down-
stream stations (5 and 9); while at upstream sites (Stations 3 and 7),
concentrations remain fairly constant.  Stations 5 and 9 show the most
erratic variations in total ammonia across the transect.  In most cases,
concentration of total ammonia ranges from 0.25 to 0.60 rng/A as NH»-N,
but occasionally jumps as high as 1.60 mg/Jl at one downstream location
(Station 5C).
      Calculations of un-ionized ammonia concentration show a definite
increase from morning to afternoon for all sampling points.  Nearly all
morning samples, which were taken between 8:00 and 11:00 a.m., and all
late afternoon samples exhibit un-ionized ammonia concentrations in ex-
cess of the 0.02 mg/SL as NH3~N criterion recommended by the U.S. Environ-
mental Protection Agency.

WINTER LOW-FLOW
Historical Records
      From an examination of stream gaging records upstream and down-
stream of the study area for the period 1951 to date, the following
trends are noted:

      (1)  At both  gages,  the  lowest  flow of  the year generally
          occurs between  mid-December and  the  end of February.
          though sometimes as late as March.
      (2)  At the Utah state line station,  the  average date
          for low-flow during those years  is 24 January, and
          the date for the upstream station is usually within
          about one day.
     (3)  Since the 1978-79 winter was much colder and more
          severe than usual, the winter low-flow was  some-
          what delayed.
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 Results
       River stage levels at the Grand Avenue Bridge in Grand Junction
 were measured daily from 25 January through the end of February.   The
 data indicate that the winter low-flow may have occurred on 31 January.
 However, due to the difficulty in distinguishing between daily fluctu-
 ations and long-term trends, no definite trend was evident.   The
 winter intensive survey was conducted on 15 and 16 February.   Six
 samples were taken at each sampling point throughout the day at 1-1/2
 to 1-3/4 hour intervals.  Temperature and pH were measured immediately
 following collection; samples were then acidified and sent to the ES
 Berkeley laboratory for analysis of total ammonia.   The flows given in
 Section 3 are a result of one measurement at each site during the
 survey,   Collected data are presented in Appendix A,  identified as
 Week Number 23.
       Temperature—River temperature varies by about  3°C (from 1° to
 4°C)  at all points across the transects throughout  the day,  peaking
 and  then leveling off at between 3:00 to 4:00 p.m.  Temperature in
 Persigo and Little Salt washes fluctuates more than the river tempera-
 ture  (about 5°C),  and peaks about an hour earlier than the river  and
 falls  off  much more rapidly.   Downstream river stations closest to the
 north  bank (same  bank as the  washes)  are most similar in temperature
 variation  pattern to  the washes.
      £H—At  all  stations,  pH values  increased throughout the day,  rang-
 ing from 7.1  to 8.4.   At Stations 3  and  5,  pH varied  by 1 unit  from
 morning  to evening,  reaching  a maximum of  8.0 at  about  3:00 p.m.  and
 maintaining it through late afternoon.   Station 4,  Persigo Wash,  ex-
 hibits  the lowest  observed pH  of  7.1, which occurs  in the early morning;
 otherwise, pH trends  are similar  to  those  of  Stations  3  and 5.
 At Stations 7 and  9,  upstream  and downstream of Little  Salt Wash,  pH
 increases  from about  7.6  to 8.0 during the  day, with  the  primary peak
occurring  at about  3:00  p.m. and  a secondary peak occurring at about
 10:30 a.m.  At all sampling points for Stations 7 and 9  there is a
noticeable drop in pH  about noon.  Station  8, Little  Salt Wash, follows
 the same pH pattern as Stations 7 and 9, although the range of pH varia-
 tion is higher.
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       Total Ammonia—Concentration of  total ammonia shows  no definite
 pattern during the  course  of  a day with relation  to time,  distance
 across a transect,  or distance downstream.   Only  Station 8,  at which
 ammonia concentration was  2 to 10  times higher, exhibits an  upward
 trend  from morning  to evening.  Generally,  the observed concentrations
 range  between  0.1 and 0.3  mg/£ NH_-N,  though concentrations  as low as
 0.016  mg/Jl and as high as  1.2  mg/£ NH  -N also occur.

       Un-ionized Ammonia—At  all but one sampling point, concentra-
 tions  of un-ionized ammonia show a definite increase  through the
 course of a day.  All concentrations are lower than the concentrations
 measured during the summer intensive survey as well as significantly
 below  the EPA  criterion of 0.02 mg/£ NH.-N.   There  is a slight corre-
 lation between un-ionized  ammonia  concentration and total  ammonia in
 terms  of hourly fluctuations,  but  the  overall trend from morning to
 evening appears to  follow  more  closely the  changes  in pH.

       Stations  3, 4 and 5  exhibit  a ten-fold  increase from morning to
 afternoon,  with concentrations  peaking about  3:00 p.m. and then taper-
 ing off  through the evening.   Stations 7, 8 and 9 show less  variation
 during  the  day  than Stations 3, 4  and  5.  Un-ionized ammonia concen-
 tration  at  these sampling  stations, near Fruita,  consistently have two
 peaks:   a  lesser one  in mid-morning and  a higher peak in mid-afternoon.
 The drop  in un-ionized ammonia  at  noon occurs at  all sampling points.
 The two washes  show more dramatic  increases in un-ionized  ammonia and
 slightly higher concentration ranges compared to  the river stations.

DISCUSSION
     Results from the two  intensive surveys  and from the weekly sampling
 events show diurnal fluctuations of river characteristics  which affect
 the concentration of  un-ionized ammonia.  In  particular, temperature ex-
 hibits  the  most consistent daily pattern in both  the  intensive surveys
 and the weekly  sampling.  An increase  of approximately 3 to  4° C appears
 to occur  from morning  to evening throughout the year, regardless of ab-
 solute temperature.  Measurements  for  pH show slight diurnal fluctuations,

                                    212

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though no consistent pattern is apparent throughout the year.   (Although
the intensive surveys showed an increasing trend in pH during the course
of a day, the weekly sampling results did not support this trend.  In
most cases, the pH exhibited only minor fluctuations—about 0.1 to 0.3
pH units—throughout each sampling event.)  Total ammonia levels, unlike
temperature and pH, appear to be independent of time of day.  Overall,
the combined effect of the variations in these three parameters indicates
that the concentration of un-ionized ammonia varies with time of day.
     For these reasons, results from the study were "time-adjusted" to
one reference time.  Time-adjusted un-ionized ammonia, as shown in Appen-
dix A, was determined on the basis of the observed trends in temperature
during the summer and winter intensive surveys.  This enables valid com-
parisons to be made between upstream and downstream stations or between
weekly sampling events.  As a conservative measure, the worst-case time
of day, usually about 3:00 p.m., was chosen as the reference time.
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                                    TECHNICAL REPORT DATA
                            (Please read Instruction! on the reverse btfore completing)
 i. REPORT NO.
     EPA  908/5-79-004
                              2.
             3. RECIPIENT'S ACCESSION NO.
 4. TITLE AND SUBTITLE
    Ammonia Investigations in the Colorado River
    Grand Junction and Fruita, Colorado
             6. REPORT OATF
                    December 1979
             6. PERFORMING ORGANIZATION CODE
 7. AUTHOR(S)
    Joyce S. Hsiao,  Bahman Sheikh-ol-Eslami,
                            Leslie H. Botham
             8. PERFORMING ORGANIZATION REPORT NO.

                      2957

             10. PROGRAM ELEMENT NO.
 . PERFORMING ORGANIZATION NAME AND ADDRESS

    Engineering-Science
    2785 N. Speer  Blvd.
    Denver, Colorado  80211
             11. CONTRACT/GRANT NO.
                 68-01-4611, D.O.W.3
 12. SPONSORING AGENCY NAME AND ADDRESS
    U. S. Environmental  Protection Agency, Region VIII
    1860 Lincoln Street, Suite 900
    Denver, Colorado   80203
                                                            13. TYPE OF REPORT AND PERIOD COVERED
                                                                       Final
             14. SPONSORING AGENCY CODE
 15. SUPPLEMENTARY NOTES
16. ABSTRACT
         Near the western border of Colorado,  the Colorado River is  the  habitat of
    four threatened and  endangered fish species  as well as the receiving water
    course for sewage  effluent from the cities of Grand Junction and Fruita.   An
    extensive monitoring program was conducted to sample four water  quality
    parameters which affect the concentration  of un-ionized ammonia, a substance
    toxic to fishes at high concentrations.  Temperature, pH, total  ammonia and
    flow were measured for thirteen months along a 20 km reach of the river.
    Collected data and historical data were compared and analyzed to establish
    representative background conditions on a  monthly basis.  These  conditions were
    then used to determine the monthly total ammonia loading allocations for the
    proposed wastewater  treatment facilities at  each of the two cities that would
    maintain a safe level of un-ionized ammonia  in the river.  This  approach of
    seasonal waste discharge allocations avoids  the unrealistic and  costly
    "worst-case" conditions method conventionally used in the design of  waste-
    water treatment plants.
                                KEY WORDS AND DOCUMENT ANALYSIS
                  DESCRIPTORS
                                               b.lDENTIFIERS/OPEN ENDED TERMS  C. COSATI Field/Group
   Ammonia
 8. DISTRIBUTION STATEMENT
  Release  to  the Public
19. SECURITY CLASS (This Report)
  Unclassified
                                                                                215
20. SECURITY CLASS (Thispage)
  Unclassified	
                                                                          22. PRICE
EPA furm 2220-1 (R«v. 4-77)    PMCVIOU* KDITIOM i« OMOLETB
                                                215

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