|
TABLE 24. WATER QUALITY /N RALSTON CREEK
<br />1998 - 2007
<br />STATION SW-UC
<br /> SNtiUC SW-UC SW-UC SW-UC SW-UC SW-UC SW-UC SW-UC SW-UC SW-UC SW-UC MIN MAX MEAN MEDIAN COUNT ND % ND
<br /> 10/21198 1 1/24/98 1 2/16/98 1/18/99 2116/99 3/ 18/99 4/20/99 5/17/99 8/15/99 7/21/99 9/14/99
<br />7
<br />5
<br />10
<br />0
<br />0%
<br />pH (std units) 7.7 8 7.3 7.2 7.9 7.8 7.5 7.3 7.3 7.5 7.2
<br />115 8
<br />598 7.53
<br />219
<br />5 .
<br />188.5 10 0 0%
<br />Conductivity (umhos) 206 598 185 192 212 185 164 115 143 195 101 388 .
<br />150 125 10 0 0%
<br />Total dissolved solids 130 388 153 119 120 137 113 101
<br />4 108
<br /><10 131
<br />14
<br />2 0 58.4 9.01 3.5 10 3 30%
<br />Total sus ended solids 3 <1. 2 4 1 0 56.4 . . 78 88 79.8 78.5 4 0 0%
<br />Hardness, total 88 81 78 78 p 0 n/a n/a 0 0 Na
<br />Carbonate
<br />0
<br />0
<br />n/a
<br />n/a
<br />0
<br />0
<br />a
<br />Bicarbonate
<br />48
<br />40
<br />62
<br />82
<br />40
<br />82
<br />58
<br />55
<br />4
<br />0
<br />0
<br />Alkalinity, Dissolved 84 68 48 40 40 84 68.5 73 8 0 0%
<br />Alkalinity, total
<br />i 80
<br /><0
<br />1 83
<br /><0
<br />1 87
<br /><0.1 78
<br /><0.1
<br /><0.1
<br /><0.1 <0.1
<br /><0.1 <0.5 <0.5 <0.5 <0.1 <0.5 0.105 0.05 11 11
<br />
<br />10 100%
<br />
<br />100%
<br />tro en
<br />Nitrate N
<br />9 . . 0 0 0 0 0 <1. <1. <t. 0 <1. 0.2 0 10
<br />Ammonia, total 0 0 23 9
<br />12 23.1 24.8 12.9 25 2t.7 23 8 0 0%
<br />Calcium 25 23 21 21 .
<br />8
<br />4 8 7
<br />8
<br />8 <5. 10 7.8 8 8 1 13%
<br />Sodium, dissolved 10 8 8 9
<br />5
<br />5 <5.
<br />3
<br />9 .
<br />3.8 .
<br />.
<br />6.2 8.2 3.8 6.2 5.3 5.8 8 0 0%
<br />Magnesium, dissolved 6.1 5.7 5.5 . . 1
<br />1 5 2.7
<br />1 0.7 2.7 1.48 1.4 8 0 0%
<br />Potassium, dissolved 1.7 1.4 1.3 1.4 0.7 16 .
<br />8
<br />6 6
<br />6 .
<br />12
<br />Sulfate 17 13 19 18 14 16 . . Q
<br />3 0.3 0.3 0.3 5 0 0%
<br />Fluoride, total 0.3 0.3 0.3 0.3 0.3
<br />12
<br />14 11
<br />10
<br />11
<br />11 .
<br />10
<br />15
<br />11.8
<br />11
<br />10
<br />0
<br />0%
<br />Chloride 15 11 12 11 0 0 Na n/a 0 0 Na
<br />Phosphorous
<br />0
<br />2 0.2 <0.5 0.24 0.25 5 4 80%
<br />Aluminum, dissolved <0.5 <0.5 <0.5 <0.5 v . 0 0 n/a n/a 0 0 Na
<br />Aluminum, total
<br />008
<br />003
<br />`0
<br />003
<br />`0
<br />003
<br />`0
<br />`0.008 `0.006
<br />`0.008 `0.003 `0.03 0.0041 0.003 8 8 100%
<br />Antimony, dissolved `0.03 `0. . . . 0 0 n/a Na 0 0 Na
<br />Antimony, total `0
<br />005 `0.005 `0.005 `0.003 `0.05 0.0068 0.0025 5 5 100%
<br />Arsenic, dissolved `0.05 `0.003 .
<br />`0.003
<br />`0.003
<br />0.0015
<br />0.0015
<br />3
<br />3
<br />100%
<br />Arsenic, total `0.003 `0.003 `0.003 <0
<br />1 <0.1 <0.1 0.03 <0.1 0.044 0.05 5 3 60%
<br />Barium, dissolved 0.03 0.04 . 03
<br />0 0.04 0.037 0.04 3 0 0%
<br />Barium, total 0.03 0.04
<br />002
<br />`0 0.04
<br />`0
<br />002 `0.001 `0.001 `0.001 .
<br />`0.001 `0.002 0.0008 0.0008 8 8 100%
<br />Be Ilium, dissolved
<br />ry `0.001 `0.002 `0.002 . . `0
<br />05 05 `0
<br />05
<br />`0 `0.05 `0.05 0.025 0.025 3 3 100%
<br />Boron, total
<br />Cadmium, dissolved
<br />`0.002
<br />`0.0002
<br />`0.0002
<br />`0.0002
<br />`0.001 .
<br />`0.001 .
<br />. `0.0002
<br />
<br />005
<br />`0 `0.002
<br />
<br />005
<br />`0 0.0004
<br />
<br />0025
<br />0 0.0003
<br />
<br />0.0025 6
<br />
<br />8 8
<br />
<br />8 100%
<br />
<br />100%
<br />Chromium, dissolved `0.005 `0.005 `0.005 `0.005 `0.005 `0.005 `0.01 .
<br />`0.01 .
<br />`0.01 .
<br />0.0050 0.005 1 1 100%
<br />Cyanide, total
<br />0
<br />0
<br />Na
<br />n/a
<br />0
<br />0
<br />a
<br /> `0
<br />02 02
<br />`0 `0
<br />02 `0.005 `0.005 `0.005 `0.005 `0.02 0.007 0.01 7 7 100%
<br />Copper, dissolved `0.02 . . . 0 0 n/a Na 0 0 Na
<br />Copper, total
<br />2
<br />0
<br /><0.1
<br />`0.03
<br />0.2
<br />0.063
<br />0.045
<br />6
<br />3
<br />Iron, dissolved 0.08 0.04 `0.03 `0.03 . 0 0 n/a Na 0 0 Na
<br />Iron, total 0 0 Na n/a 0 0 Na
<br />Iron, suspended 0 0 n/a n/a 0 0 Na
<br />Iron, Ferrous (Fe2+) 0 0 n/a n/a 0 0 Na
<br />Iron, Fertic (Fe3+)
<br />005
<br />`0
<br />`0.005 `0.005
<br />`0.002
<br />`0.05
<br />0.0067
<br />0.0025
<br />5
<br />5
<br />1
<br />Lead, dissolved `0.05 `0.002 . 002
<br />`0 `0.002 0.00 0.001 3 3 100%
<br />Lead, total `0.002 `0.002 `0.002 01
<br />`0 .
<br />`0.01 `0.01 0.005 0.005 5 5 100%
<br />Man anese, dissolved
<br />9 `0.01 `0.01 `0.01 `0.01 . 0 0 n/a Na 0 0 Na
<br />Manganese, total
<br />0002
<br />`0
<br />0.0005
<br />0.0
<br />0.0001
<br />5
<br />4
<br />80
<br />Mercury, dissolved `0.0002 0.0005 `0.0002 `0.0002 `0.0002 .
<br />0 0 n/a n/a 0 0 Na
<br />Mercury, total
<br />dissolved
<br />Molybdenum
<br />`0.005
<br />`0.01
<br />`0.01
<br />`0.01
<br />`0.01
<br />`0.005
<br />`0.005 `0.005
<br />`0.005 `0.01
<br />
<br />04
<br />`0 0.0038
<br />
<br />013
<br />0 0.0038
<br />
<br />0
<br />015 8
<br />
<br />8 8
<br />
<br />8 Na
<br />
<br />100%
<br />,
<br />Nickel, dissolved `0.02 `0.04 `0.04 `0.04 <p.pq `0.01
<br />`0
<br />01 `0.01 `0.01
<br />01
<br />01 `0
<br />`0 `0.01
<br />`0.005 .
<br />`0.05 .
<br />0.00625 .
<br />0.00375 8 8 100%
<br />Selenium, dissolved `0.05 `0.005 `0.005 `0.005 `0.005 .
<br />01
<br />`0 .
<br />. `0.0002 `0.01 0.0014 0.0003 6 8 100%
<br />Silver, dissolved `0.005 `0.001 `0.0002 `0.0002 `0.0002 . 0 0 n/a Na 0 0 Na
<br />Silver, total
<br />
<br />Thallium, dissolved
<br />`0.05
<br />`0.001
<br />`0.001
<br />`0.001
<br />`0.001
<br />`0.001
<br />
<br />01
<br />`0
<br />`0.001 0.002
<br />`0.001
<br />`0.005
<br />`0.05
<br />`0.01
<br />0.004
<br />0.005
<br />0.0005
<br />0.005
<br />8
<br />6
<br />7
<br />6
<br />
<br />100%
<br />Vanadium, dissolved `0.005 `0.01 `0.01 `0.01 `0.01 . 0 0 n/a Na 0 0 Na
<br />Thallium, total
<br />005
<br />0
<br />005
<br />`0
<br />`0
<br />005
<br />`0.005 `0.01 `0.01 `0.01 `0.005 `0.01 0.0039 0.005 7 6
<br />
<br />0 88%
<br />
<br />Na
<br />Zinc, dissolved
<br />Zinc, total . . .
<br />0014
<br />0
<br />0011
<br />0
<br />G014
<br />O
<br />0
<br />0026 0
<br />0.0011 0
<br />0.0031 n!a
<br />0.0021 Na
<br />0.0022 0
<br />10
<br />0
<br />0
<br />Uranium, dissolved 0.0025 0.0031 0.002 0.0029 0.0024 .
<br />0.002 . . . p 0 n/a Na 0 0 Na
<br />Uranium, suspended p 0 n/a Na 0 0 Na
<br />Uranium, total
<br />0
<br />1 0 0.1 0.05 0.05 2 1 50%
<br />Thorium-228, dis. (pCi/L) 0 .
<br />1
<br />0 0 0.1 0.05 0.05 2 1 50%
<br />Thorium-230, dis. (pCi/L) 0 . 0 0
<br />1 0.05 0.05 2 1 50%
<br />Thorium•232, dis. (pCilL) 0 0.1
<br />0
<br />2 0.2 0.2 .
<br />0.3 0.22 0.2 5 0 0%
<br />Radium-228, dis. (pCi/L) 0.2 0.2 0.3 . 0 0 n/a Na 0 0 Na
<br />Radium-228, susp. (pCilL) Na Na Na Na 0 0 Na
<br />Radium-226, total (pCi/L)
<br />1
<br />3
<br />1.5
<br />1.3
<br />43
<br />10.22
<br />2
<br />5
<br />0
<br />0
<br />Gross Alpha, dis. (pCilL) 2 3.3 43 .
<br /><5 <5. 1.6 27 7.14 2.5 5 2 40%
<br />Gross Beta, dis. CiIL 1.6 2.1 27 .
<br />NOTES: Mean and median statistic calculated using one-half detention limit (1/2 D.L.)
<br />ND = number of non-detects
<br />Page 5 of 25 WhetsMneASSO~lates•
<br />
|