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TABLE 11-7. WATER QUALITY IN RALSTON CREEK
<br />1998 - Jan 2009
<br />STATION SW-BDIS
<br />E
<br />•
<br /> BDIS SW-BDIS SW-BDIS SW-BDIS SW-BDIS SW-BDIS SW-BDIS SW-BDIS SW-BDIS SW-BDIS
<br />SW MIN MAX MEAN MEDIAN COUNT ND %ND
<br /> SW-BDIS
<br />10120198 -
<br />1124/98 12/16/98 1118199 2116/99 3/16/99 4/20199 5/18/99 6115199 7/21/99 9/14199
<br />8
<br />7
<br />10
<br />0
<br />0%
<br />pH (std units) 8 8.1 7.5 7.3 8.1 7.8 7.8 1.3 7.3 7.8 7.3 8.1 7.70
<br />369 .
<br />389 10 0 0%
<br />Conductivity(umhos) 440 597 500 354 391 387 288 147 153 434 246 243 10 0 0%
<br />Total dissolved solids 282 394 358 227 229 257 187 119 118 286 19
<br />3 3
<br />5 10 3 30%
<br />Total sus ended solids 3 <t. <t. 4 2 1 42.3 4 00. 131 F .
<br />145 .
<br />145 4 0 0%
<br />Hardness, total 140 180 150 110 0 0
<br />Carbonate
<br />0
<br />0
<br />Bicarbonate
<br />64
<br />40
<br />51
<br />100
<br />63.8
<br />57.5
<br />4
<br />0
<br />0%
<br />Alkalini , Dissolved 4 92 82 64 40 40 120 87.8 88 8 0 0%
<br />Alkalinity, total 110 120 110
<br />7 8
<br />0
<br />8 0
<br />8 8 0
<br />5
<br />0 1
<br /><0 c0.5 <0.5 0.8 <0.1 2.5 0.8 0.8 11 3 27%
<br />Nitrate Nitrogen 0.4 2.5 1. . . .
<br />.
<br />0 0 .
<br /><t <t <1 0 <1. 0.15 0 10 10 100%
<br />Ammonia, total 0 0
<br />40 0
<br />35 0
<br />28 0
<br />29 .
<br />12.5 . .
<br />33.9 34.1 12.5 40 30.8 34 8 0 0%
<br />Calcium 34
<br />40 54 44 27 20 6.3 38.7 34.3 6.3 54 33.0 36.5 8 0 0%
<br />Sodium, dissolved 11 7
<br />5 3
<br />4 15 15.3 3.4 20 12.8 14.5 8 0 0%
<br />Magnesium, dissolved 14 20 16 . .
<br />1
<br />1 9
<br />2 3
<br />2 1.1 2.9 2.288 2.4 8 0 0%
<br />Potassium, dissolved 2.6 2.9 2.5 1.9 2.1 7 .
<br />19 2
<br />8 .
<br />96 . 2
<br />8 160 80.3 79 10 0 0%
<br />Sulfate 100 160 130 75 77 81 5 . .
<br />0
<br />4 6
<br />0 0.5 0.5 5 0 0%
<br />Fluoride, total 0.5 0.6 0.6 0.4 0.5 11 14 .
<br />10 .
<br />18 13.60 13.5 10 0 0%
<br />Chloride 18 16 15 13 12 16 11 10 0
<br />Phosphorous
<br />0
<br />2
<br />0.2
<br />-0.5
<br />0.240
<br />0.25
<br />5
<br />4
<br />80%
<br />Aluminum, dissolved <0.5 <0.5 <0.5 <05 . 0 0
<br />Aluminum, total
<br />03
<br /><0
<br />008
<br />006
<br />0
<br />003
<br /><0
<br />0
<br />004
<br />-0.006
<br /><0.006
<br /><0.006
<br /><0.003
<br /><0.03
<br />0.0049
<br />0.0035
<br />8
<br />6
<br />75%
<br />Antimony, dissolved <0. . . . . 0 0
<br />Antimony, total
<br />c0
<br />005
<br />-0.005
<br />-0.005
<br />-0.003
<br />-0405
<br />0.0068
<br />0.0025
<br />5
<br />5
<br />100%
<br />Arsenic, dissolved -0405 -0.003 . 003
<br />-0 -0.003 0.0015 0.0015 3 3 100%
<br />Arsenic, total -0.003 -0.003 -0.003 <0
<br />1 -0.1 <0.1 .
<br />0.04 <0.1 0.046 0.05 5 3 60%
<br />Barium, dissolved 0.04 0.04 . 03
<br />0 0
<br />04 0.033 0.03 3 0 0%
<br />Barium, total <0
<br />001 -0
<br />002 0.03
<br />-0
<br />002 0.03
<br />002
<br />-0 0.04
<br />-0.002 <0.001 -0.001 -0.001 .
<br /><0.001 .
<br /><00002 0600075 0.00075 8 8 100%
<br />Beryllium, dissolved . . . . <0
<br />05 0.08 0.06 -0.05 0.08 04055 0.06 3 1 33%
<br />Boron, total
<br />dissolved
<br />Cadmium <0.002 c0.0002 <0.0002 <0.0002 <0.001 .
<br /><0.001 <0.0002 -0.002 0.0004 0.0003 6 6
<br />6 100%
<br />100%
<br />,
<br />Chromium, dissolved <0.005 <04005 <0.005 -0.005 <0.005 -0.005 <0.005 <0.005 0.0025 0.0025 6
<br />0 0
<br />Chromium, total
<br />-0.01
<br /><0.01
<br />-0.01
<br />0.0050
<br />04005
<br />1
<br />1
<br />100%
<br />
<br />, total
<br />Cyanide
<br />
<br />0
<br />
<br />0
<br />
<br />Na
<br />
<br />Na
<br />
<br />0
<br />
<br />0
<br />Copper
<br />0
<br />02
<br />-0
<br />02
<br />c0
<br />02
<br />-0
<br />02
<br />-0.005
<br />-0.005
<br />-0.005
<br />-0.005
<br />-0.02
<br />0.0068
<br />0.01
<br />7
<br />7
<br />100%
<br />Copper, dissolved c
<br />. 4 . 4 0 0 Na Na 0 0
<br />Copper, total
<br />0
<br />2
<br />c0
<br />1
<br />-0403
<br />0.2
<br />04058
<br />0.035
<br />6
<br />3
<br />50%
<br />Iron, dissolved 0404 -0403 0.03 -0403 . . 0 0
<br />Iron, total
<br />0
<br />0
<br />Iron, suspended 0 0
<br />Iron, Ferrous (Fe2+) 0 0
<br />Iron, Ferric Fe3+
<br />005
<br />-0
<br />-0.005
<br />-0.005
<br />-0.002
<br />-0.05
<br />0.0067
<br />0.0025
<br />5
<br />5
<br />100%
<br />Lead, dissolved -0.05 -0.002 . 002
<br /><0 002
<br /><0 0.001 0.001 3 3 100%
<br />Lead, total <0.002 <0.002 <04002 4
<br />-0
<br />01 .
<br />01
<br /><0 0
<br />005 04005 5 5 100%
<br />Manganese, dissolved <0.01 <0.01 <0.01 <0.01 <0401 . . . 0 0
<br />Manganese, total
<br />0002
<br />0002
<br />-0
<br />-0
<br />0002
<br />0002
<br />-0
<br /><0
<br />0002
<br />-0.0002
<br /><040002
<br />0.0001
<br />0.0001
<br />5
<br />5
<br />100%
<br />Mercury, dissolved -0. . . . . 0 0
<br />Mercury, total
<br />dissolved
<br />bdenum
<br />Mol
<br />0.173
<br />0.35
<br />0.22
<br />0.11
<br />0.14
<br />-0.005
<br />0.125
<br />0.126
<br /><0.005
<br />0.35
<br />0.156
<br />0.133
<br />8
<br />8
<br />1
<br />8
<br />13%
<br />100%
<br />,
<br />y
<br />Nickel, dissolved -0.02 <0.04 <0.04 <0.04 -0.04 -0.01 <0.01 <0.01 <0.01
<br /><0
<br />005 <0.04
<br />05
<br />-0 0.013
<br />006
<br />0 0.015
<br />004
<br />0 8 8 100%
<br />Selenium, dissolved <0405 <0.005 <0.005 <0.005 -0.005 <0.01 0.01 <0.01 .
<br /><0
<br />0002 4
<br />01
<br /><0 .
<br />001
<br />0 .
<br />0.000 6 6 100%
<br />Silver, dissolved <04005 <0.001 <040002 <0.0002 <0.0002 -0.01 . . . 0 0
<br />Silver, total
<br />dissolved
<br />Thallium
<br /><0.05
<br /><0.001
<br />-0.001
<br /><04001
<br /><0.001
<br /><04001
<br /><06001
<br /><0.001
<br />.0.001
<br /><0.05
<br />0.0036
<br />0.0005
<br />8
<br />6
<br />8
<br />6
<br />100%
<br />100%
<br />,
<br />Vanadium, dissolved -0.005 -0.01 -0.01 <0.01 -0.01 -0.01 -0.005 •0401 0.005 0.005 0 0
<br />Thallium, total
<br />05
<br />-0
<br />005
<br />-0.01
<br />-0.01
<br /><0401
<br /><0.005
<br />-0.01
<br />040036
<br />0.0025
<br />7
<br />7
<br />100%
<br />Zinc, dissolved <0.005 <04005 <0.0 . 0 0
<br />Zinc, total
<br />Uranium, dissolved
<br />0.0035
<br />0.0034
<br />0.0032
<br />0.0033
<br />0.0036
<br />0.0029 0.0022
<br />0.0019
<br />0.001
<br />0.0031
<br />0.001
<br />0.0036
<br />0.0028
<br />0.0032
<br />10
<br />00
<br />0%
<br />Uranium, suspended 0 0
<br />Uranium, total
<br />0
<br />0
<br />0
<br />0
<br />0
<br />2
<br />0
<br />0%
<br />Thorium-228, dis. CUL 0 0 03 015 0.15 2 0 0%
<br />Thorium-230, dis. (pCi/L) 0 0.3 0 0 0 0 2 0 0%
<br />Thorium-232, dis. (pCi/L) 0 0
<br />0
<br />2 0
<br />3 02 0.6 0.333 0.25 6 0 0%
<br />Radium-226, dis. (pCI/L) 0.2 0.5 0.6 0.2 . . 0 0
<br />Radium-226, sus Ci/L 0 0
<br />Radium-226, total (pCVL)
<br />1
<br />2
<br />2
<br />2
<br />1.2
<br />65
<br />14.1
<br />12
<br />6
<br />0
<br />Gross Alpha, dis. (pCVL) 242 41 65 10 . .
<br /><5 2
<br />1 43 9445 2.55 6 2 33%
<br />Gross Beta, dis. Ci/L 206 4 43 2.1 <54 . .
<br />NOTES: Meal) end median sreusuc cacuiaiw uan iy ....-?.-...... ?.... ......,
<br />No = number of non<letects No, %No = number and percent of non detects
<br />Results we in mg/L unless othervnse toted
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<br />Page 11 of 30
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