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TABLE 24. WATER QUALITY IN RALSTON CREEK
<br />1998 - 2007
<br />STATION S W-GS
<br />Conductivity (umhos)
<br />Total dissolved solids
<br />Total suspended solids
<br />Hardness, total
<br />Carbonate
<br />Bicarbonate
<br />Alkalinity, Dissolved
<br />Alkalinity, total
<br />NiVate Nitrogen
<br />Ammonia, total
<br />Calcium
<br />Sodium, dissolved
<br />Magnesium, dissolved
<br />Potassium, dissolved
<br />Sulfate
<br />Fluoride, total
<br />Chloride
<br />Phosphorous
<br />Aluminum, dissolved
<br />Aluminum, total
<br />Antimony, dissolved
<br />Antimony, total
<br />Arsenic, dissolved
<br />Arsenic, total
<br />Barium, dissolved
<br />Barium, total
<br />Beryllium, dissolved
<br />Boron, total
<br />Cadmium, dissolved
<br />Chromium, dissolved
<br />Cyanide, total
<br />Copper
<br />Copper, dissolved
<br />Copper, total
<br />Iron, dissolved
<br />Iron, total
<br />Iron, suspended
<br />Iron, Ferrous (Fe2+)
<br />Iron, Ferric (Fe3+)
<br />Lead, dissolved
<br />Lead, total
<br />Manganese, dissolved
<br />Manganese, total
<br />Mercury, dissolved
<br />Mercury, total
<br />Molybdenum, dissolved
<br />Nickel, dissolved
<br />Selenium, dissolved
<br />Silver, dissolved
<br />Silver, total
<br />Thallium, dissolved
<br />Vanadium, dissolved
<br />Thallium, total
<br />Zinc, dissolved
<br />Zinc, total
<br />Uranium, dissolved
<br />Uranium, suspended
<br />Uranium, total
<br />Thorium-228, dis. (pCi/L
<br />Thorium-230, dis. (pCi/L
<br />Thorium-232, dis. (pCi/L
<br />Radium-226, dis. (pCi/L;
<br />Radium-226, sus CL
<br />Radium-226, total (pCUI
<br />Gross Alpha, dis. (pCUL
<br />SW-GS SW-GS SW-GS SW-GS SW-GS SW-GS SW-GS SW-GS SW-GS MIN MAX MEAN MEDIAN COUNT ND % ND
<br />10/20/98 1 1/23/98 12/17/98 1/18/99 2/16/99 3/16/99 4/19/99 7/21/99 9/13/99
<br />7
<br />9
<br />8
<br />0
<br />0%
<br />8 8.1 8 7.4 8.3 7.8 7.7 7.6 7.4 8.3 7.9 .
<br />2 8 0 0%
<br />468 452 376 357 808 408 284 287 284 808 430 39 0 0%
<br />303 301 245 218 542 328 166 180 180 542 288 273 8
<br />8 2 25%
<br />4 5 1 3 <1. 1 43.4 <10. <1. 43.4 7.9 3.5
<br /> 110 150 130 130 4 0 0%
<br />150 140 120 110 n/a n/a Na n/a 0 0 n/a
<br /> Na n/a n/a n/a 0 0 n/a
<br /> 70 87 70 87 78.5 78.5 2 0 0°~
<br />120 120 140 84 130 82 70 70 140 107 120
<br />8 7
<br />9 0
<br />1 0%
<br />11
<br />8
<br />0 1
<br />8 0
<br />8 0
<br />8 2.9 0.4 0.5 0.8 <0.5 0.4 2.9 1.0 0.
<br />. .
<br />0 .
<br />0 .
<br />0 0 0 0 <t. 0 <1. 0.063 0 8 1 13%
<br />0
<br />35 33 29 28 48 26.9 32 26.9 48 33.1 32 7 0 0%
<br />4 38 29 28 69 19.3 27.8 19.3 69 36.4 29 7 0 0%
<br />4 11 20 9.5 12.5 9.5 20 13.4 12.5 7 0 0%
<br />15 15 17 2 3
<br />7 1.6 2.1 1.6 3.7 2.3 2.1 7 0 0°~
<br />2.7 2.3 2
<br />79 79 .
<br />240 89 ~ 41
<br />120 110 0 4 0 9 0 6 0.5 5 0 0%
<br />0.6 0.5 0.4 0.4 0.9
<br />13
<br />1
<br />18 15 14 13 22 14 13 Na n/a n/a a 0 0 Na
<br /> <0
<br />5 <0.5 0.3125 0.25 4 4 100%
<br /><0.5 <0.5 <0.5 0.5 .
<br />Na n/a n/a n/a 0 0 n/a
<br />03
<br />0 <0
<br />006 <0
<br />003 <0
<br />003 0.011 <0.006 <0.006 <0.003 <0.03 0.0077 0.003 7 6 86%
<br />. . . . Na n/a Na n/a 0 0 n/a
<br /> <0
<br />005 <0.005 <0.003 <0.05 0.0141 0.0025 4 4 100%
<br />0.05 <0.003 . 003
<br /><0 <0.003 0.0015 0.0015 3 3 100°,L
<br /> <0.003 <0.003 <0.003
<br /><0
<br />1
<br /><0.1 .
<br />0.04
<br /><0.1
<br />0.045
<br />0.045
<br />4
<br />2
<br />50°h
<br />0.04 0.04 . 0
<br />03 04
<br />0 0.0333 0.03 3 0 0%
<br />
<br />1
<br />002
<br /><0 0.03
<br />002
<br /><0 0.03
<br />002
<br /><0 0.04
<br /><0.002 <0.001 <0.001 .
<br /><0.001 .
<br /><0.002 0.0009 0.001 7 7 100%
<br />0.00 . . . <0.05 0.05 <0.05 0.05 0.0375 0.0375 2 1 50%
<br />002
<br />0 <0
<br />0002 <0.0002 <0.0002 <0.001 <0.0002 <0.002 0.001 0.0001
<br />025 5
<br />5 5
<br />5 100%
<br />100%
<br />.
<br />005
<br />0 .
<br /><0
<br />005 <0.005 <0.005 <0.005 <0.005 <0.005 0.003 0.0 1 1 100%
<br />. . <0.01 <0.01 <0.01 0.0050 0.005
<br /> n/a n/a Na n/a 0 0 n/a
<br />02
<br /><0 02
<br /><0 <0
<br />02 0
<br />02 <0.005 <0.005 <0.005 <0.02 0.01 0.01 6 6 100%
<br />. . . . Na n/a Na Na 0 0 n/a
<br />04
<br />0 <0
<br />03 <0
<br />03 03
<br />0 <0.1 <0.03 <0.1 0.030 0.03 5 4 80%
<br />. . . . Na n/a Na n/a 0 0 n/a
<br /> n/a n/a n/a n/a 0 0 Na
<br /> n/a n/a Na Na 0 0 n/a
<br /> n/a n/a n/a n/a 0 0 Na
<br /> <0
<br />005 <0.005 <0.002 <0.05 0.0140 0.0025 4 4 100%
<br />0.05 <0.002 . <0
<br />002 <0
<br />002 0.001 0.001 3 3 100%
<br /> <0.002 <0.002 <0.002 .
<br />01
<br /><0 .
<br /><0.01 0.006 0.005 4 4 100%
<br /><0.01 <0.01 <0.01 0.01 .
<br />Na n/a n/a n/a 0 0 Na
<br />0002
<br />0 0002
<br /><0 0002
<br /><0 <0
<br />0002 <0.0002 <0.0002 <0.0002 0.0001 0.0001 5 5 100%
<br />. . . . Na n/a n/a n/a 0 0 Na
<br />195
<br />0 0.22 0.13 0.11 0.51 0.043 0.08 0.043 0.51 0.184 0.13
<br />02 7
<br />7 0
<br />7 0%
<br />100
<br />.
<br />0.02 <0.04 <0.04 <0.04 <0.04 <0.01 <0.01 <0.01 <0.04 0.016
<br />0100
<br />0 0.
<br />0025
<br />0 7 7 100°~
<br />0.05 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 <0.005
<br /><0
<br />0002 <0.05
<br /><0
<br />005 .
<br />0.0012 .
<br />0.0001 5 5 100%
<br />0.005 <0.001 <0.0002 <0.0002 <0.0002 .
<br />n/a .
<br />n/a n/a Na 0 0 n/a
<br />05
<br />0 <0
<br />001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.05 0.007571 0.0005 7 7
<br />5 100%
<br />100%
<br />.
<br />005
<br />0 .
<br />01
<br /><0 01
<br /><0 <0.01 <0.01 <0.005 <0.01 0.0050 0.005 5 /
<br />. . . Na n/a Na n/a 0 0 n
<br />a
<br /> 01
<br /><0 <0
<br />01 <0.005 <0.01 0.004 0.005 6 5 83%
<br />0.005 <0.005 <0.005 0.005 . . Na n/a n/a Na 0 0 n/a
<br />0076 0046
<br />0 0062
<br />0 0045
<br />0 0.0051 0.0037 0.0038 0.0046 0.0037 0.0076 0.005 0.0046 8 0 0%
<br />0. . . . n/a n/a Na Na 0 0 n/a
<br /> n/a n/a n/a n/a 0 0 Na
<br /> 0 0 0 0 1 0 0%
<br />0
<br />0
<br />0
<br />0
<br />0
<br />1
<br />0
<br />0%
<br />0 0 0 0 0 1 0 0%
<br />0 7
<br />0 0.3 0.9 0.54 0.4 5 0 0%
<br />0.4 0.3 0.9 0.4 . n/a n/a n/a Na 0 0 n/a
<br />- Na n/a Na n/a 0 0 Na
<br />I 3 g 2.2 7.6 4.35 3.6 4 0 0%
<br />2.2 3.6 7.6
<br /><5
<br />1.5
<br /><5.
<br />2.05
<br />2.1
<br />4
<br />1
<br />25°k
<br />2.2 2 1.5 .
<br />NOTES: Mean and median statistic calculated using one-half detection limit (t/2 D.L.)
<br />ND = number of non-detects
<br />Results are in mg/L unless otherwise noted
<br />Page 12 of 25
<br />WhetsMneAssotlates~
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