WATER QUALITY STUDIES




        OF THE




    SPOKANE RIVER



       BETWEEN



 COEUR D'ALENE, IDAHO




         AND



   POST FALLS, IDAHO




         1988






    EPA 910/9-91-006

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                        TABLE OF CONTENTS
                                                        Page Number

List of Figures      	ii

List of Tables	v

INTRODUCTION	1

FIELD STUDIES	4

RESULTS	7

CONCLUSIONS	34

BIBLIOGRAPHY	35

APPENDIX A-Measurements of Water Quality	A-l

APPENDIX B - Method for Estimating Cross-Sectional Averages	B-1

APPENDIX C - Citizens'Volunteer Monitoring Program	C-l

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                              LIST OF FIGURES

Figure Number                                                   Page Number


     1           Location map for the field study of the
                 Spokane River, August 16-18, 1988, showing
                 water quality sampling stations	2
     2           Mean, maximum and minimum temperature
                 in the Spokane River between Lake Coeur d'
                 Alene and Post Falls Dam during the field study
                 of August 16-18,1988	9

     3           Vertical profiles of temperature at
                 Stations 5 and 6 on August 18,1988	10

     4           Mean, maximum and minimum dissolved
                 oxygen in the Spokane River between Lake
                 Coeur d'Alene and Post Falls Dam during the
                 field study of August 16-18, 1988	12

     5           Vertical profiles of dissolved oxygen at
                 Stations 5 and 6 on August 18,1988	13

     6           Mean, maximum and minimum conductivity
                 in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18,1988	15

     7           Mean, maximum and minimum pH in the
                 Spokane River between Lake Coeur d'Alene
                 and Post Falls Dam during the field study of
                 August  16-18, 1988	16

     8           Mean, maximum and minimum total
                 phosphorus in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18,1988	17

     9           Mean, maximum and minimum NO2+NO3
                 in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18,1988	18

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                           LIST OF FIGURES (cont)

Figure Number                                                   Page Number


     10           Mean, maximum and minimum Kjeldahl
                 Nitrogen in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18, 1988	19

     11           Mean, maximum and minimum Ammonia
                 Nitrogen in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18, 1988	20

     12           Mean, maximum and minimum ultimate
                 BOD in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18, 1988	22

     13           Mean, maximum and minimum alkalinity
                 in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18,1988	24

     14           Mean, maximum and minimum hardness
                 in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18, 1988	25

     15           Mean, maximum and minimum total
                 arsenic in the Spokane River between
                 Lake Coeur d'Alene and Post Falls Dam
                 during the field study of August 16-18,1988	26

     16           Mean, maximum and minimum total
                 recoverable cadmium in the Spokane River
                 between Lake Coeur d'Alene and Post Falls during the
                 field study of August 16-18, 1988	27

     17           Mean, maximum and minimum total
                 recoverable copper in the Spokane River
                 between Lake Coeur d'Alene and Post Falls during the
                 field study of August 16-18, 1988	28
                                        in

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                           iLIST OF FIGURES (cont)

Figure Number                                                   Page Number

    18           Mean, maximum and minimum total
                 recoverable chromium in the Spokane River
                 between Lake Coeur d'Alene and Post Falls during the
                 field study of August 16-18, 1988	29

    19           Mean, maximum and minimum total
                 recoverable iron in the Spokane River
                 between Lake Coeur d'Alene and Post Falls during the
                 field study of August 16-18,1988	30

    20           Mean, maximum and minimum total
                 recoverable lead in the Spokane River
                 between Lake Coeur d'Alene and Post Falls
                 Dam during the field study of
                 August  16-18,  1988	31

    21           Mean, maximum and minimum total
                 recoverable mercury in the Spokane River
                 between Lake Coeur d'Alene and Post Falls
                 Dam during the field study of
                 August  16-18,  1988	32

    22           Mean, maximum and minimum total
                 recoverable zinc in the Spokane River
                 between Lake Coeur d'Alene and Post Falls
                 Dam during the field study of
                 August  16-18,  1988	33
                                        IV

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                              LIST OF TABLES

Table Number                                                  Page Number

     1         Sampling activities for the Spokane River
               field study, August 16-18, 1988	5

     2         Daily discharge in the Spokane River near
               Post Falls and gage height in Lake Coeur
               d'Alene during August 1988	8

     3         Mean, maximum and minimum of the
               estimated deoxygenation rate, KI, in the
               Spokane River during the field study of
               August  16-18,  1988	21

     4         Mean, maximum and minimum values
               of water quality characteristics in the effluent
               of the City of Coeur d'Alene's STP during
               the field study of August 16-18, 1988	34

   A-1         In-situ measurements of water quality in
               the Spokane River during the field study of
               August  16-18,  1988	A-2

   A-2         Laboratory measurements of water quality
               for receiving waters and point sources
               during August 16-18,1988	A-14

   A-3         Index for location of laboratory samples
               for receiving waters and point sources
               during the field study of August 16-18,1988	A-18

   C-1         Water quality measurements in the
               Spokane River at the Cedars Site	C-l

   C-2         Water quality measurements in the
               Spokane River at Harbor Island 	C-2

   C-3         Water quality measurements in the
               Spokane River at Post Falls Bridge	C-3

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                                  INTRODUCTION







       During the period August 15-18, 1988 EPA Region 10 conducted a field study of water



quality in the Spokane River between the outlet of Lake Coeur d'Alene and Post Falls Dam



(Figure 1). The primary purpose of this field study was to assess water quality in the Spokane



River during a period of low river flow and elevated water temperature.  In addition, there is a



need for data to support the mathematical model of dissolved oxygen (DO) in the reach of the



Spokane River between its outlet from Lake Coeur d'Alene and the Post Falls Dam.  A model



of the dissolved oxygen budget of this reach of the river has been used to develop permit



limitations for the City of Coeur d'Alene under EPA's National Pollution Discharge



Elimination System Permit (NPDES) program. It will also be used to evaluate the impact of



additional discharges to this segment, including the proposed discharge  by the City of Hayden



Lake.



       The reach of the river between the outlet of Lake Coeur d'Alene and Post Falls Dam



presently receives the discharge from the waste treatment plant of the City of Coeur d'Alene.



Coeur d'Alene has submitted plans to increase the discharge from this treatment plant. The



City of Hayden Lake is also considering locating the outfall from their treatment plant in this



reach of the river. Results from previous studies of water quality by the EPA (Yearsley, 1980)



and the USGS (Seitz and Jones, 1982) have shown that under certain hydrologic conditions



dissolved oxygen in the river decreases downstream from the treatment plant discharge.



Furthermore, the results of mathematical modelling (Yearsley, 1987) indicate that the proposed



increases in discharge of oxygen demanding material could lead to conditions for which  the



water quality standards of the State of Idaho would be exceeded.  Other water quality issues



which have been identified in the Spokane River basin are heavy metals toxicity and excess



nutrient loadings. The heavy metals toxicity is associated with mining activities on the Coeur



d'Alene River, which discharges into Lake Coeur d'Alene. Excess nutrients in the Spokane



River have been identified as the cause of accelerated rates of eutrophication in Long Lake, in

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                               Temperature, Dissolved Oxygen, pH,
                               Conductivity, BOD, Nutrients,
                               Metals, Water Clarity
                               Temperature, Dissolved Oxygen, pH,
                               Conductivity, Water Clarity
                                  Station Number
                                  Spokane River Mile
Figure 1. Location map for the field study of the Spokane River, August 16-18, 1988
showing water quality sampling stations

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the State of Washington. The Spokane River, which receives effluent from a number of



municipal and industrial sources, discharges to Long Lake several miles downstream from Post



Falls.

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                                  FIELD STUDIES







       In support of the objectives of assessing water quality , the field study program



included measurements of water quality constituents and parameters in both the receiving



waters and in effluent of municipalities presently discharging or considering discharge to the



segment of the Spokane River between Lake Coeur d'Alene and Post Falls Dam. Table 1



shows the survey dates and the type of information collected. Data collected during the survey,



including in  situ and laboratory measurements, are given in Appendix A.







Receiving Waters



       Data collected in the receiving waters included both observations made in the field and



measurements from samples shipped to the EPA Regional Laboratory at Manchester,



Washington. Temperature, DO, conductivity and pH measurements made in the field with a



Hydrolab Model 4000 Calibration procedures for the Hydrolab Model 4000 were done in



conformance with the manufacturers recommendations. The receiving water monitoring



program was designed so that data could be used to characterize the distribution  of water



quality in both space and time. In situ measurements of temperature, DO, conductivity and pH



were made at several depths; in the right, middle and left one-thirds of the river at each of the



locations shown in Figure 1. This spatial sampling schedule was followed once in the morning



and once in the afternoon each day during the period of August 16-18, 1988.



       Samples for the laboratory analysis of biological oxygen demand (BOD), nutrients, and



heavy metals were obtained at each of the locations shown Figure 1 by make a composite from



samples taken at several depths and at the right, middle and left sections of the station. The



samples of this type were collected during the morning only. The samples were stored in



polyethylene containers, packed in ice and shipped daily, via air freight, to the Regional



Laboratory at Manchester, Washington. Methods used for measurements made  in the



laboratory follow procedures described in EPA (1983).

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Table 1. Sampling activities for Spokane River field study, August 16-18, 1989
   Medium
   Parameters
      Spatial
    Distribution
    Sampling
   Frequency
Receiving water
Point source
Temperature, DO,
pH, conductivity,
Secchi disk
BOD
(5-, 10, 15- and
20-day)

Total Metals
As

Total  Recoverable
Metals
Cd,Cr,Cu,Fe,Pb,
Hg,Zn

Nutrients
Total P
Ammonia N
NO2+NO3-N
Kjeldahl N
Temperature, DO,
pH, conductivity
BOD
(5-, 10, 15- and
20-day)

Total Metals
As

Total  Recoverable
Metals
Cd,Cr,Cu,Fe,Pb,
Hg.Zn

Nutrients
Total P
Ammonia N
NO2+NO3-N
KjeldahlN
Vertical profiles at
1/4, 1/2 and 3/4 of
the river width
Composite from
surface, mid-depth
and bottom at 1/4,
1/2 and 3/4 of river
width
Twenty-four hour
composite
Twenty-four hour
composite
Twice daily
August 16-18, 1989

Once daily
August 16-18, 1989
Once daily
August 15-18, 1989
Once daily
August 16-18, 1989
                    Suspended Solids

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       Locations of receiving water sampling stations for which laboratory analyses were



performed are shown in Figure 1.







Point Sources



       Samples from the municipal treatment facilities in Hayden Lake and Coeur d'Alene



were obtained from 24-hour composites of the each treatment plants effluent.  For those



samples analyzed at the Regional Laboratory, handling and measurement procedures were the



same as for the receiving water samples as described above. Flow measurements were



obtained from measurement devices maintained at each facility.

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                                      RESULTS







                                   Receiving Waters



       For purposes of analyzing the results, the receiving water data (Appendix A) were



aggregated in terms of time and depth-averages. The averaging method used to aggregate the



data is described in Appendix B.







River Flow and River Surface Elevation



River flow was not measured as part of the EPA Region 10 study. However, the U.S.



Geological Survey maintains a stream gage just below Post Falls Dam.  Provisional records



from this station and observations of river surface elevation were made available by Mr. Stuart



Gutenberg of the USGS in Sand Point, Idaho. Data for the month of August are presented in



Table 2.







Water Temperature



       Average, maximum and minimum water temperatures measured during the field studies



are shown in Figure 2. Averages are  by station, across days.  Maxima and minima are the



highest and lowest temperature, respectively, measured at each station during three-day study.



The distribution of water temperature during this field study was similar to that found during



the field study of August 16-17,1979 (Yearsley, 1980). Average temperatures ranged from



21.4 C to 22.9 C. For those segments of the river with water depths less than



approximately seven meters, temperatures were nearly uniform from top to bottom and from



left bank to right bank. In those segments for which water depth was greater than seven meters



(Station 6 , 8 and Post Falls Dam), there was a thermocline from a depth of seven meters to the



bottom. Vertical profiles of temperatures at a station with depth less than seven meters (Station



5) and greater than seven meters (Station 6) are shown in Figure 3.

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Table 2. Daily discharge in the Spokane River near Post Falls and gage height in Lake Coeur
d'Alene during August 1989 (preliminary information from the USGS).
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Discharge (cfs)
684
729
545
431
463
494
476
470
393
344
338
334
348
346
337
338
357
350
346
344
346
344
340
338
340
336
327
318
319
329
359
Gage Height (feet)
2127.82
2127.80
2127.82
2127.83
2127.82
2127.83
2127.80
2127.81
2127.81
2127.81
2127.80
2127.81 
2127.82
2127.82
2127.82
2127.79
2127.80
2127.81
2127.79
2127.79
2127.78
2127.78
2127.78
2127.79
2127.78
2127.75
2127.75
2127.76
2127.77
2127.75
2127.72

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CJ
 ab
 2
 0)
I
      23
      22-
21-
20
       19-
       18
         100
              102
104
106
108
                                                                             B

                                                                             O
110
112
                                                                                 D  Mean
                                                                                 A  Maximum
                                                                                 0  Minimum
                                      Spokane River Mile
          Figure 2. Mean, maximum and minimum temperature in the Spokane River between
          Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18, 1988.

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1
       5-
10-
       15
       20
         18
                                                              Q  A


                                                              Q  A
                                                              El  A


                                                             Q
                    Approximate Depth of
                         Thermocline
                  19
20
21
22
                                                   13  Station 5

                                                   A  Station 6      <=>
23
                                      Temperature - deg. C

         Figure 3. Vertical profiles of temperature at Stations 5 and 6 on August 18,1988.

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                                        11





       The lowest temperature observed at depth during the study was 18.6 C at Post Falls



Dam  Data collected in the State of Idaho's Volunteer Monitoring Program (Appendix C) show



that  temperature of the water surface was 19 C between May 25, 1988 and June 25, 1988.



This implies that the water at depth with temperatures of less than 19 C had been there for at



least five to six weeks.








Dissolved Oxygen



       Daily cross-sectional averages of concentrations and saturation levels for dissolved



oxygen, measured at each station during the field study, are shown Figure 4. Stations 1-5



show a consistent increase in the average concentration from morning to afternoon. These



stations are all fairly shallow and well-mixed from top to bottom. Water transparency, as



measured by Secchi disk, were generally in the range of 3.0 to 4.0 meters at these stations.  .



Assuming that the depth of active photosynthesis is given by 1.7*Secchi depth, Stations 1-5



are shallow enough that the cross-sectional average is affected by photosynthetic activity.



Stations 6, 8 and Post Falls Dam show a consistent increase from morning to afternoon for



cross-sectional averages only for the top five meters. The total cross-sectional average at these



three stations is controlled by the extremely low values of DO occurring at depth.



Photosynthesis has a much smaller role in the DO at depth. As a result, the deeper stations



have less diurnal variability in depth-averaged value of DO than  do the shallow stations.



       When the flow in the Spokane River is low, vertical mixing is reduced and, as



described above, a thermocline develops at those locations for which water depth is greater



than approximately seven meters. The vertical distribution of DO is also affected by the



reduced mixing and at DO also decreases rapidly at depths greater than approximately seven



meters.  Vertical profiles of DO at a shallow station (Station 5) and a  deep station (Station 6)



are compared in Figure 5.

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8
c
5
3
 VI
5
      10
       8-
       6-
        100
                                   A

                                   B
                                        A

                                        D
A

Q
                                                                       A   A
                     El
                   102
104         106         108
   Spokane River Mile
                    110
                                                                                       B  Mean
                                                                                       A  Maximum
                                                                                       0  Minimum
112
        Figure 4. Mean, maximum and minimum dissolved oxygen in the Spokane River between
        Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

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 5-
10-
15-
20
                 Approximate Depth of
                     Thermocline
                                4              6

                                  DO-mg/1
                                                                 A  0

                                                                 A m
                                                                A  E


                                                                  Q
      D  Station 5
      A  Station 6
10
 Figure 5.  Vertical profiles of dissolved oxygen (DO) at Stations 5 and 6 on August 18,1988.

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                                        14





Conductivity and pH



       Conductivity and pH were measured both in the field with the Hydrolab Survey Model



4000 and in the laboratory. Cross-sectional averages of the conductivity measured in the field



for the three-day sampling period are given in Figure 6.



       Average pH increases monotonically downstream from the outlet of Lake Coeur



d'Alene, as shown in Figure 7.








Nutrients



       Concentrations of total phosphorus, nitrate+nitrite-nitrogen, Kjeldahl nitrogen and total



ammonia-nitrogen, averaged over the three-day period of the field study, are shown in Figures



8 through 11.  Average total phosphorus were below the detection level (0.01 mg/1) at the



outlet of Lake Coeur d'Alene.  Average total phosphorus increased to 0.055 mg/1 at the first



river sampling station downstream from the STP. As shown in Figure 8, the average



concentration of total phosphorus decreased in a downstream direction after the initial pulse



was introduced by the STP. Possible sinks for total phosphorus include uptake by attached



algae and macrophytes and uptake by planktonic algae which eventually settle to the bottom of



the river. No data were collected during this survey for testing either of these hypotheses.



       Nitrate+nitrite-nitrogen in the Spokane River was below the level of detection (0.01



mg/I) throughout the field study (Fig. 9). Both Kjeldahl nitrogen  and total ammonia-nitrogen



were greater at the station just downstream from the discharge of the STP, as shown in Figures



10 and 11.  However, Kjeldahl nitrogen and ammonia-nitrogen decreased downstream after



the initial increase. Volatilization, nitrification, and algal uptake are potential sinks for



ammonia. When nitrification  occurs, the loss in ammonia-nitrogen should be accompanied by



an increase in nitrate-nitrogen. The measurements of nitrate+nitrite-nitrogen made in this study



do not show an increase in nitrate+nitrite-nitrogen corresponding to the decrease in ammonia-



nitrogen. Insufficient information was available to determine the importance of volatilization or



algal uptake to the nitrogen budget.

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I
>*
o
      60
      58-
      56-
      54-
      52-
       50
         102
                                         A


                                         Q
                          A
                          Q

                          O
                                 A


                                 ID


                                 O
                                                                          A
                                                                          Q
                                                                Q  Mean
                                                                A  Maximum

                                                                  Minimum
104
 106            108

Spokane River Mile
110
112
        Figure 6. Mean, maximum and minimum conductivity in the Spokane River between Lake
        Coeur d'Alene and Post Falls Dam during the field of study of August 16-18, 1988.

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.
 3

1
 GO
 i
      7.5
      7.0-
      6.5-
      6.0-
      5.5
                           A
                           D
                           O
                  A

                  0

                  O
                    A

                    0
                    0
                                                    Q

                                                    O
                                                                Q  Mean

                                                                A  Maximum
                                                                  Minimum
         102
104
 106           108

Spokane River Mile
110
112
         Figure 7. Mean, maximum and minimum pH in the Spokane River between Lake Coeur
         d'Alene and Post Falls Dam during the field study of August 16-18, 1988.

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>
 E
I
      0.10
      0.08-1
0.06-1
      0.04-J
      0.02-J
      0.00
          102
                                      D

                                      O
                                                    Q   Mean
                                                    A   Maximum
                                                       Minimum
                   104
106            108
Spokane River Mile
110
112
          Figure 8. Mean, maximum and minimum total phosphorus in the Spokane River between
          Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18, 1988.

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0.011
I
0.010-^
0.009
                                                                                     13  Mean
                                                                                     A  Maximum
                                                                                     0  Minimum
                                                                                                            00
     102
                         104
106
108
110
112
                                Spokane River Mile
    Figure 9.  Mean, maximum and minimum NO2+NO3-Nitrogen in the Spokane River between
    Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

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,
6
2
13
      0.4
      0.3 -]
      o.i-
      0.0
         102
                                                                 Q   Mean
                                                                 A   Maximum
                                                                    Minimum
104
106
108
110
112
                                       Spokane River Mile
         Figure 10. Mean, maximum and minimum Kjeldahl Nitrogen in the Spokane River between
         Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

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I
     0.15
     0.10-
      0.05-
      0.00
         102
                                          a

                                          o
                                                                                       Q  Mean
                                                                                       A  Maximum
                                                                                       0  Minimum
104
106
108
110
112
                                       Spokane River Mile
          Figure 11. Mean, maximum and minimum NH3 Nitrogen in the Spokane River between
          Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

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                                     21


Biological Oxygen Demand (BODI

       Ultimate BOD, Luit, and rates of deoxygenation,Ki, were determined from standard,

uninhibited 5-, 10-,15-,20- and 60-day BOD measurements from samples obtained on each of

the three days during the field study. The parameters Luit and Kl were estimated by

minimizing the squared difference between the observations and the equation for BOD:


                  -K.t
          L = LuUe  1                                                   (1)

where,

       L = the BOD at any time, t, mg/1

       Luit = the ultimate BOD, mg/1

       t = time, days

       KI = the deoxygenation rate constant, days"1.



       The simplex method for minimizing a nonlinear function (Nelder and Mead, 1964) was

used to find the minimum.  The mean, maximum and minimum ultimate BOD for the receiving

water stations are shown in Figure 12, the estimated values of the deoxygenation rates, KI, are

shown in Table 3.
Table 3. Mean, maximum and minimum of the estimated deoxygenation rate, KI, in the
Spokane River during the field study of August 16-18,1988.
                                  Deoxygenation Rate, KI, days'1
Spokane River Mile

111.1
108.6
106.5
104.4
102.2
Mean
0.05
0.05
0.08
0.09
0.08
Maximum
0.06
0.05
0.13
0.14
0.10
Minimum
0.04
0.05
0.06
0.06
0.06

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I
 I


9
a
a
         4-
3-
         2-
                                                                           Q
                                                                           O
                                                 13  Mean

                                                 *  Maximum
                                                 0  Minimum
                                                                                                   to
                                                                                                   to
          102
                104
106
108
110
112
                                       Spokane River Mile

            Figure 12. Mean, maximum and minimum ultimate BOD in the Spokane River between
            Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18, 1988.

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                                      23





Alkalinity and Hardness



       Mean, maximum and minimum of observed alkalinity and hardness in the Spokane



River during the field study are shown in Figures 13 and 14, respectively. Both hardness and



alkalinity increase downstream implying a continuous inflow along the entire reach.



Groundwater inflow (Drost and Seitz, 1978) represents a potential source.







Metals



       Average concentrations of total arsenic, total recoverable cadmium, total recoverable



copper, total recoverable chromium,total recoverable iron, total recoverable lead, total mercury,



and total recoverable zinc are shown in Figures 15 through 22.







Point Sources



       Water samples from the Coeur d'Alene STP, composited over a 24-hour period, were



collected on August 16, 17, 18, and 19, 1989. The average, maximum and minimum for



measurements of flow rates, nutrients, metals, BOD and conductivity are given in Table 4.



Average flow of the STP on each of these days was obtained from the flow-measuring device



operated by the STP. Loadings were estimated as the product of the average flow times the



measured concentration of the composited sample. The loadings estimated in this way are also



given in Table 4.

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t
8
y
o
 (A
 at
       22.
21-
       20-
        19-
        18
          102
                    B

                    O
                                                                     A
                                                                     B
                                                    Q  Mean
                                                    A  Maximum
                                                      Minimum
                                                                                                            to
                 104
106
108
110
112
                                        Spokane River Mile
           Figure 13. Mean, maximum and minimum alkalinity in the Spokane River between Lake
           Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

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a
e
cA 22-
O
U
6
CO
c3
CO
CO
0>
1
K
"3 21.
o
H

90-
A

A
D A
D Q

A 0 A
m
0 0
Q



0







D Mean
A Maximum
 Minimum






                                                                                                 to
                                                                                                 Ul
102
104
106           108


Spokane River Mile
no
112
Figure 14. Mean, maximum and minimum hardness in the Spokane River between Lake
Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

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I
      1.0-
      0.8-
0.6-
      0.4.
      0.2.
      0.0.
         100
                     D

                     O
                                                        A
                                                        D
                                                                                   Q  Mean
                                                                                   A  Maximum
                                                                                     Minimum
                                                                                                            to
                                                                                                            o\
               102
104         106
                                     Spokane River Mile
108
110
112
           Figure 15.  Mean, maximum and minimum total arsenic in the Spokane River between Lake
           Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

-------
s.
I
       1.5
        1.0-
        0.5-
        0.0
          100
                                                               Q




                                                               O
                       n
                       o
                                                                  Q   Mean

                                                                  A   Maximum

                                                                     Minimum
                                                                                                            to
102
104
106
108
110
112
                                        Spokane River Mile
         Figure 16. Mean, maximum and minimum total recoverable cadmium in the Spokane River

         between Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

-------
I

3
u
u

1
b


      10
       8-
6-
       4-
       2-
        102
                                                                               Q  Mean


                                                                               A  Maximum


                                                                               0  Minimum
                104
106
108
110
112
                                                                      to
                                                                      oo
                                     Spokane River Mile
        Figure 17. Mean, maximum and minimum total recoverable copper in the Spokane River

        between Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18, 1988.

-------
d3
 u

4-
3-1
2-
1-
 100
              Q
              O
                   102
                                                                    A
                                                                    8
104         106          108
                               Spokane River Mile
110
                                                                               Q  Mean
                                                                               A  Maximum
                                                                                 Minimum
112
  Figure 18.  Mean, maximum and minimum total recoverable chromium in the Spokane River
  between Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

-------
o
    100.
     80-
     60-
     40-
     20-
       100
                    D
                    O
102
                                        A
                                        3
                                           A
                                           Q
                                           O
                                                                 Q   Mean
                                                                 A   Maximum
                                                                 0   Minimum
104         106          108
      Spokane River Mile
110
112
        Figure 19. Mean, maximum and minimum total recoverable iron in the Spokane River between
        Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

-------
fi
       4-
3-
       2-
       1-
        100
              D

              O
             102
                                                A

                                                Q
   Q

   O
104
106
108
                                    Spokane River Mile
                               Q

                               O
110
112
                                                                                       Q  Mean
                                                                                       A  Maximum
                                                                                         Minimum
        Figure 20. Mean, maximum and minimum total recoverable lead in the Spokane River between
        Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18, 1988.

-------
f
 bo
ffi
 u
1
0.5
0.4-1
0.3-
0.1-
0.0
   100
                      A

                      D

                      o
                     102
                                                                                   13  Mean
                                                                                   A  Maximum
                                                                                     Minimum
104         106         108

     Spokane River Mile
110
112
                                                                                                               U)
                                                                                                               to
   Figure 21. Mean, maximum and minimum total recoverable mercury in the Spokane River
   between Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

-------



>
3
'
U
s

G
^
(U
Di
a
o






90-
80-
70-

60-



50-


40-


30-
20-
10-
0-



A
Q
0 
A
D A
0 

6
o














Q Mean

A Maximum
 Minimum








100
102
104         106          108

   Spokane River Mile
110
112
Figure 22. Mean, maximum and minimum total recoverable zinc in the Spokane River between
Lake Coeur d'Alene and Post Falls Dam during the field study of August 16-18,1988.

-------
                                     34
Table 4. Mean, maximum and minimum values of water quality characteristics of the effluent
of City of Coeur d'Alene's STP during the field study of August 16-18, 1988. Loadings for
BOD, nutrients and metals are also shown.
Parameter
Flow - cfs
Deoxygenation Rate,
KI - days'1
pH - standard units
Conductivity -
}imho/cm
Alkalinity as CaCOs
-mg/1
Hardness as CaCOs
-mg/1
NHs-Nitrogen - mg/1
NO2+NOs-Nitrogen
-mg/1
Kjeldahl Nitrogen -
mg/1
Total Phosphorus -
mg/1
Total As - Hg/1
Total Recoverable
Cd-ng/1
Total Recoverable
Cu - ng/1
Total Recoverable Cr
Total Recoverable
Total Recoverable
Hg-ng/1
Total Recoverable

Mean
4.24
0.07

6.7
674

197

71

15.8
1.2

22.3

7.0

1.5
0.70

5.9

3.5
5.3
0.11

31
Parameter Value
Maximum
4.45
0.08

6.7
677

202

110

16.6
1.6

23.0

7.2

1.8
1.0

14.4
'
4.0
7.0
0.17

51

Minimum
4.09
0.06

6.7
672

193

32

14.7
0.8

21.5

6.8

1.4
0.5

1.6

3.1
4.0
0.08

0
Loading
Pounds/Day










360
28.1

510

160

0.04
0.02

0.10

0.08
0.10
0.003

0.71
Zn-ng/1

-------
                                      35



                                  CONCLUSIONS





      The results of the field study conducted during the period August 16-18, 1988 were



were similar to those of earlier studies (Yearsley, 1980) in a number of ways. Major



conclusions derived from the results include:



 Dissolved oxygen was low at those locations in the river where a thermocline had formed.



The depth of the thermocline was generally at a depth of approximately seven meters and was



observed in two segments of the river.  One  of these segments was near Ford Rock (Spokane



River Mile 104.4) and the other was in the forebay of Post Falls Dam (Spokane River Mile



102.2).



     The City of Coeur d'Alene's STP contributes a significant load of phosphorus to the



Spokane River.  Upstream from the STP discharge the observed concentration of total



phosphorus was below the detection limit of 0.01 mg/1. The mean value of observed total



phosphorus downstream from the STP was 0.055 mg/1. The estimated average loading of total



phosphorus from the STP was 160 pounds/day during this period.



      In addition, the results of the August 16-18,  1988  field study showed that the City of



Coeur d'Alene' STP contributed significantly to the BOD loading and to the loading of



nitrogen, primarily in the form or organic nitrogen and ammonia.

-------
                                     36


                                 BIBLIOGRAPHY
Drost, B.W. and H.R. Seitz.  1978. Spokane Valley-Rathdrum Prairie Aquifer, Washington
      and Idaho, U.S. Geological Survey Open-File Report 77-289.

Seitz, H.R. and M.L. Jones. 1982. Flow characteristics and water-quality conditions in the
      Spokane River, Coeur d'Alene Lake to Post Falls Dam, northern Idaho. USGS Open-
      File Report 82-102. 56pp.

Yearsley, J.R.  1980. Water quality studies of the Spokane River between Coeur d'Alene,
      Idaho and Post Falls, Idaho, 1978-1979.  EPA Region 10, Seattle, WA.  53 pp.

Yearsley, J.R.  1987. An estimate of NPDES permit limits for the Cities of Post Falls and
      Coeur d'Alene, Idaho. ESD, EPA Region 10, Seattle, WA.

-------
                                    APPENDIX A

                  Measurements of Water Quality in the Receiving Waters
                       and from Point Sources in the Spokane River
                       between Coeur d'Alene and Post Falls, Idaho


      In situ measurements of water quality in the Spokane River between Coeur d'Alene and

Post Falls, Idaho during the period August 16-18,1988 are given in Table A-l. Station

locations can be obtained from Figure 1. Laboratory measurements of various water quality

characteristics from both receiving waters and point sources are given in Table A-2. The key

relating laboratory sample numbers and station location is given in Table A-3.

-------
Table A-l. In-situ measurements of water quality in the Spokane River during the
          field study of August 16-18, 1988.
Date
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
Time
hm
630

650

700

713

718

723

734

746

754

805

813

820

833

842

851

905

906

910

918

929

935

Station
Location
#1 Right

#lMid

#lLeft

#2 Right

#2 Mid

#2 Left

#3 Right

#3 Mid

#3 Left

#3A Right

#3 A Mid

#3 A Left

#4 Right

#4 Mid

#4 Left

#4 A Right

MA Mid

#4ALeft

#5 Right

#5 Mid

#5 Left

Depth
m
0.9
2.8
0.3
2.0
0.8
2.4
0.7
3.2
0.7
2.8
0.7
2.1
0.3
2.6
0.9
3.3
0.8
2.4
0.8
2.8
0.9
3.1
0.9
3.1
0.6
5.5
0.5
5.1
0.8
3.5
0.7
2.6
0.7
5.6
0.9
6.5
0.7
5.9
0.8
5.9
0.9
5.0
Temp
C
20.34
20.37
20.14
20.17
20.20
20.22
20.31
20.35
20.39
20.31
20.24
19.99
20.80
20.86
20.94
20.97
20.91
20.90
21.26
21.30
21.27
21.24
21.31
21.16
21.42
21.45
21.48
21.33
21.50
21.52
21.72
21.75
21.82
21.81
21.82
21.78
21.93
21.88
21.92
21.82
21.95
21.90
DO
mg/L
7.45
8.07
8.16
8.09
8.08
7.93
7.95
7.88
7.92
7.91
7.97
7.88
7.78
7.60
7.84
7.77
8.06
7.96
7.23
7.18
7.68
7.87
7.86
7.87
8.10
8.05
8.08
7.79
7.97
7.97
8.61
8.57
8.52
8.46
8.51
8.32
8.71
8.40
8.72
8.65
8.73
8.73
DO
%Sat
88.3
95.7
96.3
95.6
95.5
93.8
94.2
93.4
94.0
93.7
94.3
92.8
93.0
91.0
94.0
93.2
96.6
95.4
87.2
86.7
92.7
94.9
94.9
94.7
98.0
97.5
97.9
94.0
96.6
96.6
104.8
104.4
103.8
103.1
103.7
101.4
106.4
102.5
106.5
105.4
106.7
106.6
Cond
umho/cm
48
48
48
48
49
49
53
52
51
49
49
50
52
53
53
53
53
53
53
53
54
53
52
53
53
53
52
52
53
53
53
52
54
52
52
52
52
52
52
52
52
52
PH
std units
7.54
7.79
7.45
7.66
7.37
7.59
7.45
7.53
7.55
7.41
7.52
7.29
7.51
7.20
7.21
7.24
7.32
7.04
6.75
7.11
7.29
7.28
7.16
7.25
7.18
7.38
7.04
7.40
7.01
7.36
7.07
7.50
7.48
7.52
7.38
7.47
7.32
7.57
7.52
7.77
7.46
7.84
Secchi Depth
meters


3.0





4.0


*


3.8





3.5



4.0

3.8





3.5

3.3





3.6

                                         A-2

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
Time
hm
954




1001



1008


1020




1030

1035
1044





1430


1437

1441

1445

1452

1454

1500

Staloc
#6 Right




#6 Mid



#6 Left


#8 Right




#8 Mid

#8 Left
P.F. Dam





LakeEnt


#1 Right

tflMid

#lLeft

#2 Right

#2 Mid

#2 Left

Depth
m
0.8
2.0
5.0
7.0
7.7
0.8
2.0
5.0
7.0
0.2
2.0
3.0
0.9
2.0
5.0
7.0
8.9
0.9
2.0
0.9
0.8
2.0
5.0
7.0
10.0
12.5
1.1
2.0
5.0
1.0
2.0
1.0
2.2
1.0
3.3
1.0
3.0
1.0
3.2
1.0
2.0
Temp
C
22.04
22.03
21.91
21.91
21.81
22.05
22.03
21.98
21.83
22.05
22.04
21.99
22.05
21.98
21.90
21.82
21.48
22.02
22.05
22.08
22.06
22.01
21.89
21.73
21.12
19.04
21.74
21.58
21.23
21.34
21.34
21.42
21.11
21.42
21.03
21.33
21.01
21.16
21.01
21.08
21.01
DO
mg/L
8.26
8.29
8.15
7.64
7.09
8.41
8.39
8.33
7.53
8.46
8.39
8.42
8.31
8.26
8.18
7.88
4.46
8.35
8.35
8.46
8.18
8.07
7.82
6.65
3.13
0.18
7.56
7.55
7.62
8.29
8.23
8.16
8.25
8.34
8.42
8.09
8.28
8.27
8.16
8.47
8.40
DO
%Sat
101.1
101.4
99.5
93.3
86.4
102.9
102.6
101.9
91.8
103.6
102.7
102.9
101.8
101.0
99.9
96.0
54.0
102.2
102.2
103.6
100.2
98.8
95.5
80.9
37.6
2.0
92.1
91.7
91.9
100.1
99.4
98.7
99.2
100.9
101.2
97.7
99.4
99.5
97.9
101.8
100.8
Cond
umho/cm
52
51
52
52
51
52
52
52
52
52
52
52
51
51
51
51
51
52
52
51
52
51
52
51
51
51
49
50
49
49
49
49
50
50
50
59
55
51
55
51
51
PH
std units
7.43
7.53
7.50
7.34
7.13
7.48
7.33
7.64
7.26
7.37
7.52
7.58
7.30
7.40
7.53
7.42
6.85
7.39
7.44
7.46
7.44
7.41
7.26
6.91
6.63
6.46
7.21
7.28
7.36
7.56
7.66
7.48
7.64
7.51
7.68
7.22
7.37
7.44
7.38
7.64
7.67
Secchi Depth
meters
4.5




4.2





'
4.5




























                                          A-3

-------
Table A-l. In-situ measurements of water quality in the Spokane River during the
          field study of August 16-18,1988.
Date
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
Tune
hm
1506

1510

1515

1520

1525

1528

1536

1541

1545
1550

1557

1603

1606

1609

1615



1620





1630
Staloc
#3 Right

#3 Mid

#3 Left

#3A Right

#3 A Mid

#3 A Left

#4 Right

#4 Mid

#4 Left
#4 A Right

MAMid

#5 Right

#5 Mid

#5 Left

#6 Right



#6 Mid





#6 Left
Depth
m
1.0
2.6
1.0
3.5
1.0
2.2
1.0
3.0
1.0
3.2
1.0
2.5
1.0
5.5
1.0
5.4
1.0
1.0
1.7
1.0
6.7
1.0
5.8
1.0
6.5
1.0
3.1
1.0
2.0
5.0
8.0
1.0
2.0
5.0
7.0
10.0
11.0
1.0
Temp
C
21.45
21.32
21.37
21.31
21.45
21.38
21.79
21.47
21.79
21.47
21.78
21.49
22.14
21.44
22.19
21.40
22.25
22.53
22.21
22.43
21.80
22.86
21.95
22.78
21.91
22.66
22.10
22.57
22.41
22.02
22.41
22.50
22.36
22.05
21.86
21.09
20.71
22.47
DO
mg/L
8.33
8.18
8.34
8.23
8.59
8.28
8.00
7.97
8.33
8.64
8.53
8.80
8.46
7.82
8.60
8.15
8.73
8.62
8.64
9.13
7.63
8.82
8.50
8.73
8.39
8.87
8.81
8.71
8.56
8.44
8.56
8.71
8.63
8.46
6.66
4.43
3.80
8.69
DO
%Sat
100.9
98.8
100.8
99.4
104.0
100.1
97.4
96.5
101.5
104.6
103.9
106.5
103.8
94.7
105.6
98.5
107.3
106.5
106.1
112.5
93.0
109.6
103.8
108.3
102.4
109.8
108.0
107.7
105.5
103.3
105.5
107.5
106.2
103.6
81.2
53.3
45.3
107.3
Cond
umho/cm
54
53
53
54
53
53
53
53
53
53
53
53
53
53
54
52
52
53
53
54
53
53
52
53
52
53
52
52
52
51
52
53
52
52
52
52
53
52
pH
std units
7.21
7.28
7.28
7.34
7.44
7.36
7.11
7.18
7.27
7.41
7.34
7.34
7.27
7.15
7.36
7.24
7.47
7.94
7.95
7.68
7.37
7.57
7.46
7.68
7.51
7.70
7.72
7.61
7.55
7.39
7.55
7.59
7.59
7.61
6.95
6.69
6.62
7.54
Secchi Depth
meters






































                                         A-4

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18,. 1988.
Date
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/16/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
Time
hm



1645




1650

1656
1700





630

640

646

656

700

704

711

720

730

742

747

750

Staloc



#8 Right




#8 Mid

#8 Left
P.P. Dam





#1 Right

#lMid

tflLeft

#2 Right

#2 Mid

#2 Left

#3 Right

#3 Mid

#3 Left

#3A Right

#3AMid

#3 A Left

Depth
m
2.0
5.0
8.9
1.0
2.0
5.0
7.2
10.0
1.0
2.0
1.0
1.0
2.0
5.0
7.0
10.0
11.9
1.0
2.8
1.0
2.0
1.0
2.9
1.0
2.8
1.0
2.9
1.0
2.2
1.0
3.0
1.0
3.7
1.0
2.6
1.0
3.3
1.0
3.2
1.0
3.0
Temp
C
22.33
22.01
21.46
22.67
22.61
22.07
21.88
21.45
22.58
22.46
22.47
22.68
22.63
22.03
21.89
21.06
19.49
20.59
20.53
20.60
20.65
20.63
20.63
20.85
20.86
20.93
20.66
20.90
20.75
20.49
20.47
20.54
20.56
20.51
20.48
20.89
20.80
20.94
20.80
20.93
20.75
DO
mg/L
8.59
8.22
4.64
8.52
8.25
8.30
7.29
2.35
8.46
8.36
8.67
8.20
8.32
8.19
6.88
2.13
0.01
7.93
7.88
7.81
7.67
7.53
7.56
7.88
7.73
7.80
7.89
7.70
7.83
7.60
7.46
7.88
7.75
8.14
7.89
7.67
7.72
7.50
7.69
7.53
7.77
DO
%Sat
105.7
100.6
56.2
105.5
102.0
101.6
88.9
28.5
104.6
103.1
106.9
101.6
103.0
100.3
84.0
25.6
0.1
94.5
93.7
93.1
91.4
89.7
90.2
94.3
92.5
93.4
94.1
92.3
93.6
90.4
88.7
93.7
92.2
96.8
93.7
91.8
92.3
89.9
92.0
90.2
92.8
Cond
umho/cm
52
52
53
51
51
51
50
52
52
52
52
53
51
51
52
52
52
49
48
49
48
48
48
58
58
54
54
50
50
52
52
52
52
51
51
53
53
53
53
53
53
PH
std units
7.63
7.31
6.78
7.47
7.42
7.40
7.17
6.54
7.44
7.41
7.71
7.44
7.50
7.44
7.09
6.56
6.37
7.47
7.44
7.41
7.36
7.30
7.31
7.30
7.26
7.26
7.44
7.38
7.46
7.26
7.23
7.34
7.29
7.47
7.41
7.20
7.20
7.15
7.22
7.15
7.23
Secchi Depth
meters












'




3.4













4.1









                                         A-5

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
Time
hm
755


806


814

823

827

831



840


847



857



905




915





930




Station
Location
#4 Right


#4 Mid


#4 Left

#4A Right

#4AMid

#4ALeft



#5 Right


#5 Mid



#5 Left



#6 Right




#6 Mid





#6 Left




Depth
m
1.0
2.0
5.0
1.0
2.0
5.0
1.0
2.0
1.0
1.5
1.0
1.5
1.0
2.0
5.0
6.5
1.0
2.0
5.9
1.0
2.0
5.0
6.1
1.0
2.0
5.0
6.0
1.0
2.0
5.0
7.0
7.8
1.0
2.0
5.0
7.0
10.0
12.8
1.0
2.0
5.0
7.5
10.0
Temp
C
21.29
21.35
21.32
21.36
21.37
21.32
21.32
21.36
21.42
21.40
21.60
21.40
21.63
21.63
21.63
21.62
21.73
21.78
21.70
21.75
21.78
21.75
21.72
21.76
21.78
21.72
21.65
21.81
21.83
21.84
21.83
21.58
21.89
21.89
21.83
21.79
21.02
19.87
21.90
21.90
21.86
21.83
21.11
DO
mg/L
8.01
7.92
7.92
8.05
7.96
7.97
8.24
8.22
8.71
8.63
8.56
8.63
8.52
8.42
8.39
8.37
8.44
8.30
8.25
8.42
8.38
8.29
8.25
8.42
8.32
8.33
8.30
8.20
8.17
8.17
8.10
6.97
8.30
8.23
7.52
7.54
4.55
1.81
8.32
8.28
8.21
7.86
3.02
DO
%Sat
96.6
95.8
95.6
97.2
96.2
96.3
99.5
99.3
105.4
104.4
104.0
104.4
103.5
102.2
101.9
101.6
102.7
101.0
100.3
102.6
102.1
100.9
100.4
102.6
101.4
101.4
100.8
100.0
99.6
99.6
98.8
84.6
101.4
100.5
91.7
91.8
54.6
21.2
101.6
101.0
100.2
95.8
36.3
Cond
umho/cm
52
54
53
53
53
52
52
53
52
52
53
52
53
53
53
52
52
53
52
52
53
52
52
52
52
52
52
52
52
52
52
52
52
52
52
52
52
52
52
52
52
52
55
PH
std units
7.25
7.24
7.23
7.27
7.15
7.24
7.32
7.33
7.47
7.47
7.37
7.47
7.34
7.42
7.45
7.39
7.38
7.34
7.36
7.35
7.38
7.37
7.35
7.37
7.35
7.40
7.38
7.38
7.38
7.39
7.38
6.91
7.39
7.43
7.16
7.11
6.71
6.47
7.34
7.41
7.42
7.23
6.61
Secchi Depth
meters
4.0


3.9






3.6

*



3.5






3.5



3.7















                                         A-6

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
Time
hm
942




952




1002
1008





1435

1440

1445

1453

1458

1502

1509

1512

1516

1521

1528

1532

Station
Location
#8 Right




#8 Mid




#8 Left
P.F. Dam





#1 Right

#lMid

#lLeft

#2 Right

#2 Mid

#2 Left

#3 Right

#3 Mid

#3 Left

#3A Right

#3 A Mid

#3 A Left

Depth
m
1.0
2.0
5.0
7.0
10.0
1.0
2.0
5.0
7.0
8.0
1.0
1.0
2.0
5.0
7.0
10.0
13.4
0.8
2.8
1.0
2.8
1.0
2.8
1.0
2.5
1.0
3.0
1.0
2.0
1.0
2.6
1.0
3.1
1.0
2.2
1.0
3.0
1.0
2.8
1.0
2.5
Temp
C
21.82
21.85
21.83
21.79
21.38
21.88
21.88
21.85
21.82
21.75
21.78
21.91
21.92
21.88
21.83
21.19
18.58
21.37
21.34
21.34
21.32
21.63
21.31
21.40
21.14
21.15
21.13
21.19
21.16
21.12
21.05
21.05
21.00
21.04
21.02
21.33
21.09
21.23
20.99
21.15
21.00
DO
mg/L
8.21
8.17
8.02
7.67
2.79
8.22
8.18
8.17
7.92
6.94
8.30
7.94
7.98
7.79
7.73
1.63
0.15
7.66
7.59
7.48
7.43
6.77
7.63
7.85
7.82
7.87
7.92
8.02
7.92
8.09
8.18
8.07
8.18
8.43
8.45
7.91
7.92
8.22
8.47
8.73
8.54
DO
%Sat
100.1
99.6
97.7
93.4
33.7
100.3
99.9
99.6
96.5
84.5
101.1
97.0
97.5
95.0
94.2
19.6
1.7
92.5
91.7
90.4
89.8
82.2
92.1
94.9
94.1
94.7
95.2
96.6
95.3
97.3
98.3
97.0
98.2
101.3
101.5
95.5
95.2
99.1
101.7
105.1
102.5
Cond
umho/cm
52
52
52
52
51
52
52
51
51
51
52
52
52
52
52
52
53
49
49
49
49
49
48
54
52
51
51
51
50
52
52
52
53
52
52
53
53
52
53
52
53
PH
std units
7.39
7.39
7.38
7.25
6.60
7.20
7.31
7.35
7.26
6.96
7.37
7.26
7.26
7.21
7.15
6.54
6.35
7.48
7.35
7.14
7.18
8.20
7.37
7.28
7.33
7.27
7.36
7.44
7.48
7.35
7.46
7.26
7.43
7.46
7.56
7.06
7.22
7.35
7.64
7.36
7.52
Secchi Depth
meters
4.0








































                                         A-7

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
Time
h m
1541

1545

1550

1555

1600



1610


1617


1623


1629

1638



1646






1700




Station
Location
#4 Right

#4 Mid

#4 Left

#4A Right

#4AMid



MA Left


#5 Right


#5 Mid


#5 Left

#6 Right



#6 Mid






#6 Left




Depth
m
1.0
4.8
1.0
5.6
1.0
3.0
1.0
1.7
1.0
2.0
5.0
7.1
1.0
2.0
5.0
1.0
2.0
5.0
1.0
2.0
5.7
1.0
2.0
1.0
2.0
5.0
7.0
1.0
2.0
5.0
7.0
10.0
12.0
15.6
1.0
2.0
5.0
7.0
10.0
Temp
C
22.33
21.30
21.97
21.26
21.74
21.58
22.26
22.13
22.30
22.07
21.72
21.67
22.37
22.20
21.72
22.47
22.01
21.85
22.35
22.07
21.81
22.44
22.04
22.38
22.25
21.93
21.87
22.50
22.21
21.95
21.82
21.14
20.34
18.90
22.56
22.47
21.94
21.83
21.13
DO
mg/L
8.54
8.17
8.47
8.24
8.80
8.58
9.08
9.19
8.93
8.88
8.41
8.17
8.85
8.85
8.31
8.91
8.74
8.19
8.67
8.67
8.10
9.04
8.84
8.72
8.66
8.37
7.97
8.43
8.52
8.35
7.22
4.40
2.64
0.08
8.45
8.57
8.46
7.55
2.97
DO
%Sat
105.0
98.6
103.5
99.4
107.2
104.1
111.6
112.7
109.9
108.7
102.3
99.4
109.0
108.7
101.1
109.9
106.9
99.9
106.7
106.1
98.7
111.4
108.2
107.4
106.4
102.2
97.3
104.1
104.6
102.0
88.0
52.9
31.3
1.0
104.5
105.8
103.4
92.0
35.8
Cond
umho/cm
54
53
54
53
53
53
53
53
53
53
53
52
53
53
53
53
52
53
53
53
52
53
52
53
52
52
52
52
52
52
52
53
53
54
52
52
52
52
53
PH
std units
7.34
7.57
7.35
7.52
7.41
7.48
7.69
8.02
7.64
7.66
7.29
7.25
7.61
7.60
7.52
7.66
7.55
7.47
7.43
7.40
7.50
7.70
7.87
7.68
7.69
7.77
7.47
7.47
7.61
7.60
7.29
6.71
6.35
6.39
7.52
7.61
7.45
7.04
6.48
Secchi Depth
meters
3.8

3.8





3.8









3.5




3.8















                                         A-8

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/17/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
Time
h m
1723




1731


1738
1740





630

637

644

655

657

700

706

714

722

730

733

736

Station
Location
#8 Right




#8 Mid


#8 Left
P.F. Dam





#1 Right

tflMid

#lLeft

#2 Right

#2 Mid

#2 Left

#3 Right

#3 Mid

#3 Left

#3A Right

#3 A Mid

#3 A Left

Depth
m
1.0
2.0
5.0
7.0
9.0
1.0
2.0
5.0
1.0
1.0
2.0
5.0
8.0
10.0
12.0
1.1
2.8
1.3
2.0
1.0
2.6
1.1
3.1
1.1
3.2
1.1
2.2
1.1
2.9
1.1
3.5
1.1
2.4
1.1
3.0
1.1
3.1
1.1
2.8
Temp
C
22.51
22.14
21.93
21.87
21.64
22.51
22.19
21.96
22.60
22.16
22.16
21.92
21.82
21.45
19.43
20.27
20.26
20.27
20.33
20.18
20.20
20.43
20.39
20.41
20.48
20.16
20.19
20.67
20.67
20.77
20.79
20.71
20.70
20.46
20.50
20.47
20.49
20.43
20.36
DO
mg/L
8.50
8.38
7.79
7.59
3.38
8.41
8.54
7.55
8.88
8.03
8.03
7.65
6.11
3.88
0.14
8.04
8.01
7.89
7.73
7.80
7.64
7.32
7.28
7.38
7.36
7.70
7.64
7.75
7.57
7.80
7.68
7.82
7.72
7.48
7.36
7.94
7.88
7.94
7.92
DO
%Sat
104.9
102.7
95.1
92.6
41.1
103.8
104.8
92.3
109.8
98.5
98.5
93.4
74.5
47.0
1.6
95.1
94.8
93.4
91.6
92.2
90.3
87.0
86.3
87.6
87.5
91.0
90.3
92.4
90.3
93.2
91.9
93.4
92.2
88.9
87.5
94.4
93.7
94.3
93.9
Cond
umho/cm
52
52
52
52
52
52
52
51
52
53
53
52
51
51
51
49
48
48
49
49
48
61
61
55
51
49
50
55
54
55
54
54
54
52
52
52
52
53
52
PH
std units
7.42
7.55
7.29
7.20
6.50
7.41
7.55
7.25
7.64
7.30
7.30
7.40
6.95
6.57
6.34
7.75
7.73
7.70
7.52
7.61
7.52
7.30
7.22
7.36
7.33
7.42
7.43
7.37
7.28
7.40
7.38
7.36
7.28
7.28
7.47
7.34
7.60
7.32
7.55
Secchi Depth
meters







































                                         A-9

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
Time
hm
742


752


758
805

809


814


822


828



834


840



848








900



Station
Location
#4 Right


#4 Mid


#4 Left
#4 A Right

#4 A Mid


#4ALeft


#5 Right


#5 Mid



#5 Left


#6 Right



#6 Mid








#6 Left



Depth
m
1.1
2.0
5.1
1.1
2.4
5.2
1.1
1.1
1.8
1.1
2.0
5.9
1.1
2.0
5.2
1.1
2.0
4.8
1.1
2.0
5.0
6.5
1.0
2.0
5.0
1.0
2.0
5.0
6.2
1.0
2.0
5.0
7.0
10.0
12.0
13.0
15.0
16.8
1.0
2.0
5.0
7.0
Temp
C
20.91
20.95
20.93
20.91
20.93
20.90
20.99
21.26
21.26
21.48
21.48
21.41
21.50
21.51
21.50
21.50
21.54
21.52
21.53
21.53
21.47
21.44
21.56
21.55
21.47
21.63
21.66
21.63
21.62
21.67
21.67
21.66
21.30
20.30
20.39
19.76
18.96
18.86
21.64
21.66
21.64
21.63
DO
mg/L
7.97
7.96
7.98
8.17
8.09
8.05
8.16
8.46
8.42
8.32
8.34
8.42
8.24
8.23
8.21
8.37
8.32
8.34
8.25
8.13
8.10
8.06
8.34
8.19
8.17
8.02
7.97
7.88
7.75
7.91
7.88
7.83
7.63
5.15
2.50
1.34
0.11
0.08
7.99
7.92
7.81
7.39
DO
%Sat
95.5
95.5
95.7
97.8
97.0
96.4
97.9
102.1
101.6
100.8
101.0
101.9
99.8
99.7
99.5
101.4
100.9
101.1
100.0
98.5
98.1
97.6
101.2
99.4
98.9
97.4
96.9
95.7
94.1
96.1
95.8
95.2
92.1
61.0
29.7
15.7
1.3
1.0
97.1
96.2
94.9
89.7
Cond
umho/cm
52
53
53
53
53
52
53
52
52
53
52
51
52
52
52
53
53
53
53
53
52
52
53
52
52
52
52
52
53
52
52
52
52
53
55
53
54
55
52
52
52
52
PH
std units
7.46
7.46
7.47
7.44
7.44
7.47
7.39
7.57
7.51
7.50
7.38
7.61
7.42
7.43
7.49
7.47
7.47
7.57
7.49
7.53
7.55
7.42
7.52
7.47
7.55
7.37
7.41
7.42
7.31
7.34
7.42
7.43
6.73
6.52
6.38
6.38
6.37
6.38
7.30
7.31
7.37
7.23
Secchi Depth
meters
3.9


4.0








'. 3.5





3.7










3.8












                                         A-10

-------
Table A-l. In-situ measurements of water quality in the Spokane River during the
          field study of August 16-18,1988.
Date
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
Time
hm
922




930


933
940




1448

1455

1458

1507

1510

1513

1521

1525

1531

1537

1540

1546

Station
Location
#8 Right




#8 Mid


#8 Left
P.P. Dam




#1 Right

tflMid

#lLeft

#2 Right

#2 Mid

#2 Left

#3 Right

#3 Mid

#3 Left

#3A Right

#3AMid

#3 A Left

Depth
m
1.0
2.0
5.0
7.0
8.7
1.0
2.0
4.4
1.0
1.0
2.0
5.0
7.0
10.0
1.0
2.7
1.0
1.9
1.0
2.6
1.0
2.0
1.0
2.8
1.0
2.2
1.0
2.7
1.0
3.3
1.0
1.5
1.0
3.3
1.0
3.0
1.0
2.8
Temp
C
21.53
21.59
21.56
21.57
21.56
21.69
21.68
21.60
21.63
21.70
21.71
21.64
21.63
21.56
21.03
20.84
20.91
20.89
20.88
20.75
21.08
20.73
20.80
20.66
20.92
20.77
21.11
21.07
21.07
21.04
21.12
21.15
21.10
20.86
21.10
20.91
21.14
20.92
DO
mg/L
7.41
7.31
7.52
6.96
7.16
7.68
7.65
8.05
8.16
7.34
7.28
7.19
7.22
6.28
8.07
8.11
7.96
7.96
8.08
8.05
7.93
7.87
7.87
7.97
8.03
7.99
7.91
8.04
7.84
7.92
8.42
8.47
7.55
7.64
8.00
8.26
8.26
8.75
DO
%Sat
89.8
88.8
91.2
84.5
86.8
93.4
93.0
97.8
99.1
89.3
88.5
87.4
87.7
76.1
97.0
97.0
95.4
95.4
96.8
96.1
95.4
94.0
94.1
95.1
96.2
95.5
95.1
96.6
94.2
95.2
101.2
102.0
90.8
91.4
96.2
99.0
99.4
104.9
Cond
umho/cm
51
52
51
51
51
52
51
51
52
51
52
52
52
53
49
49
49
49
49
49
53
52
50
51
50
51
54
53
53
53
53
53
52
53
53
53
54
53
pH
std units
7.13
7.12
7.25
7.11
7.16
7.24
7.27
7.41
7.51
7.10
7.12
7.18
7.22
6.80
7.43
7.77
7.53
7.59
7.50
7.56
7.27
7.43
7.27
7.59
7.50
7.59
7.34
7.50
7.23
7.57
7.42
7.54
7.12
7.22
7.16
7.38
7.39
7.85
Secchi Depth
meters
3.9





































                                         A-ll

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
Tune
hm
1553


1601


1606
1614

1617



1625



1634

1637



1645

1652



1659





1708




Staloc
#4 Right


#4 Mid


#4 Left
#4A Right

#4AMid



#4ALeft



#5 Right

#5 Mid



#5 Left

#6 Right



#6 Mid





#6 Left




Depth
m
1.0
2.0
5.0
1.0
2.0
5.0
1.0
1.0
2.0
1.0
2.0
5.0
7.0
1.0
2.0
5.0
6.2
1.0
4.2
1.0
2.0
5.0
7.0
1.0
2.0
1.0
2.0
5.0
6.1
1.0
2.0
5.0
7.0
10.0
13.4
1.0
2.0
5.0
7.0
10.0
Temp
C
21.56
21.41
20.82
21.53
21.45
20.80
21.46
22.03
21.80
21.96
21.80
21.48
21.47
22.06
21.99
21.51
21.50
21.92
21.62
22.20
21.85
21.58
21.51
22.31
22.10
22.03
21.99
21.75
21.70
22.25
22.25
21.96
21.70
21.38
19.93
22.32
22.30
21.88
21.71
21.69
DO
mg/L
8.54
8.47
7.99
8.40
8.39
8.00
8.56
8.92
8.94
8.76
8.76
8.34
8.24
8.77
8.71
7.82
7.84
8.87
8.33
8.56
8.56
8.24
8.01
8.55
8.87
8.47
8.44
7.99
7.79
8.28
8.27
8.14
7.83
5.18
1.38
8.24
8.21
8.13
7.80
7.68
%Sat
103.5
102.5
95.6
101.8
101.5
95.6
103.7
109.1
109.0
107.0
106.7
101.0
99.8
107.3
106.5
94.8
95.0
108.3
101.2
105.1
104.4
100.0
97.0
105.2
108.7
103.7
103.2
97.3
94.7
101.7
101.6
99.5
95.3
62.6
16.2
101.4
101.0
99.2
94.9
93.4
Cond
umho/cm
53
52
52
53
53
52
53
53
53
53
53
53
53
54
53
53
53
53
53
54
53
53
53
53
53
53
53
52
52
52
53
53
52
52
52
52
53
53
52
52
PH
std units
7.53
7.65
7.60
7.59
7.62
7.43
7.56
7.80
7.94
7.72
7.82
7.48
7.38
7.68
7.81
7.24
7.20
7.99
7.55
7.59
7.68
7.47
7.26
7.77
8.00
7.59
7.65
7.37
7.21
7.50
7.58
7.39
7.20
6.69
6.30
7.45
7.48
7.36
7.17
7.10
Secchi Depth
meters



3.9





3.4







3.7

















3.7




                                         A-12

-------
Table A-l.  In-situ measurements of water quality in the Spokane River during the
           field study of August 16-18, 1988.
Date
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
08/18/88
Time
hm
1724




1732


1736
1739





Station
Location
#8 Right




#8 Mid


#8 Left
P.F. Dam





Depth
m
1.0
2.0
5.0
7.0
8.5
1.0
2.0
5.0
1.0
1.0
2.0
5.0
7.0
10.0
12.5
Temp
C
22.14
21.88
21.73
21.68
21.64
22.29
22.18
21.74
22.32
22.03
21.91
21.81
21.74
21.51
19.43
DO
mg/L
7.96
8.12
7.56
7.23
7.16
7.80
7.85
7.40
8.11
7.78
8.10
7.87
7.43
4.72
0.11
DO
%Sat
97.6
99.1
92.0
87.9
86.9
95.9
96.3
90.0
99.8
95.2
98.9
95.9
90.5
57.2
1.3
Cond
umho/cm
53
52
52
52
52
52
53
52
52
53
53
52
52
52
51
pH
std units
7.34
7.42
7.15
7.03
6.97
7.22
7.26
7.04
7.43
7.20
7.38
7.28
7.09
6.58
6.25
Secchi Depth
meters















                                         A-13

-------
Table A-2.  Laboratory measurements of water quality for receiving
          waters and point sources during August 16-18, 1988.
EPA
Lab#
340300
340301
340304
340307
340302
340303
340305
340306
340311
340316
340321
340312
340317
340322
340313
340318
340323
340314
340319
340324
340315
340320
340325
340326
BODS
mg/L
8.00
5.60
12.40

8.40
8.60
12.20
0.73
0.42
0.44
0.89
0.79
0.78
1.28
0.98
1.04
1.25
0.92
1.27
1.70
1.13
1.08

BOD10
mg/L
17.60
29.60
27.60

38.60
36.80
47.20
0.59
0.89
0.79
1.14
1.12
1.47
1.48
1.30
1.55
1.67
1.39
1.83
1.96
1.22
1.50

BOD15
mg/L
114.00
90.40
72.80

23.60
8.20
24.00
0.96
0.82
1.09
1.43
1.40
1.94
1.87
1.64
1.75
2.01
1.78
2.20
2.28
1.76
2.10

BOD20
mg/L
74.00
98.00
86.80

15.40
17.60
21.60
0.95
1.15
1.21
1.91
1.84
2.34
2.07
1.90
2.03
2.16
2.03
2.30
2.48
1.85
2.25

BOD60
mg/L







1.75
1.92

2.89
2.66

3.09
2.88

3.54
3.05

3.35
2.98


                                  A-14

-------
Table A-2. Laboratory measurements of water quality for receiving
          waters and point sources during August 16-18, 1988.
EPA
Lab#
340300
340301
340304
340307
340302
340303
340305
340306
340311
340316
340321
340312
340317
340322
340313
340318
340323
340314
340319
340324
340315
340320
340325
340326
NH3-N
Total
mg/1
0.01U
16.000
16.600
14.700
0.01U
0.055
0.055
0.058
0.01U
0.01U
0.01U
0.066
0.052
0.120
0.032
0.020
0.01U
0.01U
0.01U
0.01U
0.01U
0.01U
0.0 1U
0.0 1U
4O2NO3-r
Total
mg/1
0.01U
1.65
0.80
1.24
0.01U
25.00
26.00
25.50
0.01U
0.01U
0.01U
0.01
0.01M
0.01
0.0 1U
0.01U
0.01U
0.0 1U
0.01U
0.01U
0.0 1U
0.0 1U
0.01U
0.01U
Kjel-N
Total
mg/1
0.04U
22.50
23.00
21.50
0.04U
1.92
2.06
2.50
0.10
0.14
0.12
0.32
0.24
0.34
0.26
0.22
0.18
0.26
0.20
0.18
0.20
0.16
0.20
0.06
Phos
Total
mg/1
0.01U
7.000
7.200
6.800
0.0 1U
9.900
10.200
10.200
0.01 M
0.010
0.010
0.056
0.044
0.066
0.064
0.044
0.044
0.040
0.038
0.040
0.030
0.030
0.036
0.010
                                  A-15

-------
Table A-2. Laboratory measurements of water quality for receiving
          waters and point sources during August 16-18, 1988.
EPA
Lab#
340300
340301
340304
340307
340302
340303
340305
340306
340311
340316
340321
340312
340317
340322
340313
340318
340323
340314
340319
340324
340315
340320
340325
340326
Arsenic
As-Total
ug/1
0.6
1.4
1.8
1.4
0.5U
3.7
4.4
3.9
0.5U
0.5
0.5
0.6
0.5U
0.6
0.8
0.5
0.6
0.6
0.5
0.7
0.5U
0.7
0.5U
0.5U
Mercury
Hg-Total
ug/1
0.08U
0.17
0.08U
0.08U
0.08U
0.21
0.08U
0.08U
0.44
0.45
0.08U
0.25
0.13
0.08U
0.30
0.19
0.08U
0.17
0.37
0.08U
0.11
0.15
0.08U
0.08U
Cadmium
Tot-Rec
ug/1
0.1U
0.6
1.0
0.5
0.1U
0.2
2.0
0.2
0.7
0.4
0.6
0.7
0.4
0.4
0.3
0.3
0.3
0.3
0.3
1.3
0.2
0.3
0.2
0.1U
Chromiurr
Tot-Rec
ug/l
0.5U
3.3
3.1
4.0
0.7
1.3
0.9
0.9
0.5U
0.7
0.5U
1.2
1.7
0.5U
1.8
0.7
0.5U
0.5U
1.2
1.9
0.7
0.7
1.4
0.5U
Lead
Tot-Rec
ug/1
1U
5
7
4
1U
2
1
1
1
1
2
2
2
2
1
2
2
1
1
2
1
1
2
1U
Iron
Tot-Rec
ug/1
7U

253
216
7U
102
105
109
25
22
18
27
24
23
34
32
34
28
30
84
25
28
37
7U
Zinc
Tot-Rec
ug/1
5U

51
42
5U
43
38
40
75
63
67
'66
62
66
56
54
56
53
58
56
43
47
46
5U
                                   A-16

-------
Table A-2. Laboratory measurements of water quality for receiving
          waters and point sources during August 16-18, 1988.
EPA
Lab#
340300
340301
340304
340307
340302
340303
340305
340306
340311
340316
340321
340312
340317
340322
340313
340318
340323
340314
340319
340324
340315
340320
340325
340326
Cond@25C
Meter
umho/cm
1.5
672.0
674.0
677.0
1.7
538.0
538.0
538.0
53.8
53.8
52.8
57.6
57.0
58.3
57.5
57.8
56.2
56.9
56.2
56.6
56.0
55.3
55.2
1.8
pHLAB
Meter
Std Unts
4.40
6.74
6.72
6.74
4.20
6.80
6.80
6.74
6.25
5.95
5.97
6.30
6.22
6.17
6.37
6.27
6.20
6.35
6.25
6.30
6.35
6.34
6.39
4.28
Alk-Tot
CaCO3
mg/1
0.1U
193.0
202.0
196.0
0.6
60.4
62.0
60.0
18.7
19.0
19.2
19.3
19.3
20.1
19.6
19.9
20.5
20.2
20.6
19.9
19.8
19.5
19.5
1.5
Hard-Tot
CaCO3
mg/1
l.OU

103.0
110.0
l.OU

105.0
103.0
20.5
21.5
21.4
21.8
21.5
21.9
21.3
22.3
21.6
22.0
21.9
21.9
21.3
21.4
21.5
1.0
                                   A-17

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Table A-3. Index for location of laboratory samples for receiving waters and point
           sources during the field study of August 16-18,1988.
EPA
Lab#
340300
340301
340304
340307
340302
340303
340305
340306
340311
340316
340321
340312
340317
340322
340313
340318
340323
340314
340319
340324
340315
340320
340325
340326
Date
88/08/16
88/08/16
88/08/17
88/08/18
88/08/16
88/08/16
88/08/17
88/08/18
88/08/16
88/08/17
88/08/18
88/08/16
88/08/17
88/08/18
88/08/16
88/08/17
88/08/18
88/08/16
88/08/17
88/08/18
88/08/16
88/08/17
88/08/18
88/08/18
Time
0840
0845
0845
0940
0950
0955
0930
0835
0630
0630
0630
0740
0715
0710
0835
0800
0745
0920
0845
0820
1020
0945
0920

Description
Coeur d'Alene STP effl blank
Coeur d'Alene STP effl (G)
Coeur d'Alene STP effl (24)
Coeur d'Alene STP effl (24)
Hayden Lk STP effl blank
HaydenLk STP effl (G)
Hayden Lk STP effl (24)
HaydenLk STP effl (24)
Stal
Stal
Stal
Sta3
Sta3
Sta3
Sta4
Sta4
Sta4
Sta5
Sta5
Sta5
Sta8
Sta8
Sta8
Transfer Blank
River
mile

111.0
111.0
111.0




111.1
111.1
111.1
108:6
108.6
108.6
106.5
106.5
106.5
104.4
104.4
104.4
102.0
102.0
102.0

                                   A-18

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                                  APPENDIX B

                               Method for Estimating
                             Cross-Sectional Averages
                                        of
                                   Water Quality


       To compute the mean values by station for dissolved oxygen (DO) concentration,

percent DO saturation, water temperature and conductivity, the receiving water data for

these parameters were aggregated using areal average techniques. The data were depth-

averaged for each section (right, middle, and and left) of each station.



       Although DO, temperature, and conductivity were measured at increasing depths,

these specific depths were not identical across sections or stations. Therefore, a method

was sought that would produce estimates of parameter averages from the raw data. First,

the river bed at each section was assumed to be 0.5 meters below the greatest depth where

measurements were made (see Figs. B-l.l and B-1.2). Next, simple linear equations

(expressing parameter values as a function of water depth) were fit to each successive pair

of measurements. Parameter values were assumed to be constant in the intervals between

the surface and the first measurement and between the last measurement and the river bed

(Fig. B-1.3). Parameter averages  were then computed from the areas under the resulting

line segments.



       Assuming the section widths (right, middle, and left) were equal, the overall

average for the station was computed by summing all of the areas, then dividing by the

sum of the water depths.  These data were further aggregated by summing over all the days

on which measurements were made to obtain a station average of each parameter for the

period of study. The results are presented as highly aggregated tranformations of the raw

data.
                            B-l

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                                    APPENDIX C

                            Measurements obtained from the
                         Citizens' Volunteer Monitoring Program


      The State of Idaho's Department of Environmental Quality, working in cooperation with

local volunteers, have implemented a sampling program in the Spokane River at three locations in

the Spokane River between Coeur d'Alene and Post Falls, Idaho. Data obtained from this

program is given in Tables C-l, C-2, and C-3.

-------
Table C-1. Water quality measurements in the Spokane River at the Cedars Site (approximate R.M. 111.1) obtained
        in the Gtizen's Volunteer Monitoring Program supported by the State of Idaho's Department of
        Environmental Quality.
CVMP1988
CEDARS SITE
DATE
TIME
MAXIMUM DEPTH (M)
SECCffl DEPTH (M)
TEMPERATURE (C)@ 1M DEPTH
TEMPERATURE (Q@ 1M OFF BOTTOM
DISSOLVED OXYGEN (MG/L)@ 1M
DISSOLVED OXYGEN (MG/L)@ 1M OF!
TOTAL AMMONIA (MG/L)
TOTAL NO2+NO3 (MG/L)
TOTAL KJELDAHL (MG/L)
TOTAL PHOSPHORUS (MG/L)
ORTHOPHOSPHORUS (MG/L)
SPECIFIC CONDUCTANCE (UMHOS)
CHLOROPHYLL a (UG/L)
ZINC (UG/L)
DEQDUPE
5/25/88
1100
2.75
2.75
13.3
12.2
12
12
0.013
0.014
0.11
0.011

52

90
6/27/88
1100
2.75
2.75
20
21
4
4
0.014
0.008
0.13
0.009
0.001
45
1.1
220
7/19/88
930
2.75
2.75
21
20
8
8
0.05
0.018
0.05
0.008
0.001
48
1.1
60
8/23/88
1000
2.6
2.6
20
20
7
8
0.007
0.02
0.09
0.009
0.002
51
1.7
30
9/27/88
1000
2.5
2.5
16
16
9
7
0.018
0.02
0.12
0.007
0.002
51
1
59
9/27/88
1000
2.5
2.5
16
16
9
7
0.021
0.016
0.11
0.008
0.002
53
1

10/18/88
1000






0.007
0.012
0.13
0.008
0.001
54
0.7
50

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Table C-2. Water quality measurements in the Spokane River at Harbor Island (approximate R.M. 106.5) obtained
        in the Citizen's Volunteer Monitoring Program supported by the State of Idaho's Department of
        Environmental Quality.
SPOKANE RIVER
CVMP 1988
HARBOR ISLAND
DATE
TIME
MAXIMUM DEPTH (M)
SECCHI DEPTH (M)
TEMPERATURE (C)@ 1M DEPTH
TEMPERATURE (C)@ 1M OFF BOTTOM
DISSOLVED OXYGEN (MG/L)@ 1M
DISSOLVED OXYGEN (MG/L)@ 1M OH
TOTAL AMMONIA (MG/L)
TOTAL NO2+NO3 (MG/L)
TOTAL KJELDAHL (MG/L)
TOTAL PHOSPHORUS (MG/L)
ORTHOPHOSPHORUS (MG/L)
SPECIFIC CONDUCTANCE (UMHOS)
CHLOROPHYLL a (UG/L)
ZINC (UG/L)
FECAL COLIFORM (#/100 ML)
DEQDUPE
5/25/88
1300
5.75
3.25
13.3
13.3
12
12
0.011
0.019
0.14
0.014
0.001
50

70

6/27/88
1200
5.75
3.75
20
21
9
9
0.027
0.017
0.13
0.017
0.007
46
1.6
140

7/19/88
1100
5.75
3.25
21
21
9
6
0.045
0.009
0.12
0.018
0.003
50
1.7
60
10
8/23/88
1030
5.8
2.75
21
21
4
8
0.026
0.027
0.19
0.037
0.022
55
6.5
30

9/27/88
1140
5.8
4.5
15
15
8
9
0.053
0.036
0.17
0.029
0.017
53
0.8
55
10
9/27/88
1140
5.8
4.5
15
15
8
9
0.045
0.027
0.14
0.027
0.018
53
1


10/18/88
1000






0.024
0.025
0.13
0.02
0.013
56
0.6
50


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Table C-3. Water quality measurements in the Spokane River at Post Falls Bridge (approximate R.M. 101.8) obtained
        in the Citizen's Volunteer Monitoring Program supported by the State of Idaho's Department of
        Environmental Quality.
SPOKANE RIVER
CVMP 1988
POST FALLS BRIDGE
DATE
TIME
MAXIMUM DEPTH (M)
SECCHI DEPTH (M)
TEMPERATURE (C)@ 1M DEPTH
TEMPERATURE (Q@ 1M OFF BOTTOM
DISSOLVED OXYGEN (MG/L)@ 1M
DISSOLVED OXYGEN (MG/L)@ 1M OF!
TOTAL AMMONIA (MG/L)
TOTAL NO2+NO3 (MG/L)
TOTAL KJELD AHL (MG/L)
TOTAL PHOSPHORUS (MG/L)
ORTHOPHOSPHORUS (MG/L)
SPECIFIC CONDUCTANCE (UMHOS)
CHLOROPHYLL a (UG/L)
ZINC (UG/L)
DEQDUPE
5/25/88
1430
9
3.25
14
13.4
13
13
0.013
0.017
0.14
0.014

0.001
80
70
6/27/88
1200
8.6
3.5
19.7
21
5
5
0.019
0.021
0.12
0.016
0.005
48
220
140
7/19/88
1030
8.5
2.75
22.5
21
9
9
0.028
0.003
0.13
0.017
0.002
50
60
60
8/23/88
1115
8.6
4.75
22
22
10
8
0.01
0.016
0.12
0.028
0.01
55
30
30
9/27/88
1240
8.5
4.75
15
15
8
8
0.035
0.033
0.16
0.027
0.017
54
52
55
9/27/88
1240
8.5
4.75
15
15
8
8
0.038
0.034
0.18
0.027
0.018
53
1

10/18/88







0.024
0.018
0.16
0.023
0.014
56
50
50

-------