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TABLE 24. WATER QUALITY IN RALSTON CREEK <br />1998 - 2007 <br />STATION SW-BOS <br />activity (umhos) <br />dissolved solids <br />Nitrogen <br />tie, total <br />n <br />t, dissolved <br />sium, dissolved <br />ium. dissolved <br />tntimony, dissolved <br />tntimony, total <br />lrsenic, dissolved <br />\rsenic, total <br />3adum, dissolved <br />3arium, total <br />3eryllium dissolved <br />3oron, 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 Fertic (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 />Urenium, total <br />Thorium-228, dis. CU <br />Thorium-230, dis. (pCi/ <br />Thorium-232, dis. (pCV <br />Radium-226, dis. (pCUI <br />Radium-226, sus . C <br />Radium-226, total (pCi~ <br />Gross Alpha, dis. (pCil <br />BOS SW-BOS SW-BOS SW-BOS SW-BOS <br />SW SW-BOS SW-BOS MIN MAX MEAN MEDIAN COUNT ND % ND <br />SW-BOS SW-BOS SW-BOS S W-BOS <br />8199 - <br />2/16199 3116199 4120199 5/17199 6/15199 7121/99 9113199 <br />% <br />10120198 1 1123198 1 2/16/98 1/1 7 <br />2 7 <br />7 7 <br />7 <br />7.2 <br />8.7 <br />7.8 <br />7.7 <br />10 <br />0 <br />0 <br />8.7 8.1 7.6 7.4 8.4 7.7 7.8 . . <br />2 . <br />388 139 808 399 390 10 0 0% <br />477 467 497 356 808 391 276 139 19 252 117 534 270 279 10 0 0% <br />306 309 330 221 534 316 180 117 138 1 503 9 <br />53 3.5 10 1 10 % <br />4 3 2 3 2 1 503 5 11.3 <10. 12p 150 . <br />142.5 150 4 0 0% <br />150 150 150 120 <br />nla <br />nla <br />nla <br />Na <br />0 <br />0 <br />nla <br /> Na Na Na nla 0 0 nla <br /> 86 40 61 98 40 98 66.25 63.5 4 0 0% <br /> 140 83 66 40 40 150 94.75 90 8 0 0% <br />150 100 97 82 <br />4 <br />0 <br />5 1 <br /><0 <0.5 <0.5 <0.5 <0.1 2.5 0.8 0.4 11 4 36% <br />0.4 1.8 1.7 0.8 2.5 0. . . <br /><1 p <i. 0.15 0 10 10 100% <br />0 0 0 0 0 0 0 c1. <1. . <br />32 <br />13 <br />8 <br />48 <br />31.9 <br />32.5 <br />8 <br />0 <br />0% <br />35 34 33 28 48 13.8 31.1 <br />31 <br />5 28 <br />8 . <br />8 <br />9 72 37.0 35.3 8 0 0 <br />44 39 44 28 72 8.9 . <br />8 <br />12 . <br />9 <br />12 . <br />4 <br />4 19 13.3 14.0 8 0 0% <br />15 15 16 11 19 4.4 . <br />3 <br />2 . <br />1 <br />2 . <br />1 <br />2 3.6 2.4 2.4 8 0 0% <br />2.8 2.4 2.5 2 3.6 1.2 <br />22 . <br />78 . . <br />15 240 94.5 83.5 10 0 0% <br />120 120 130 77 240 89 54 15 0.4 0.9 0.6 0.5 5 0 0 <br />0.6 0.5 0.5 0.4 0.9 <br />11 <br />15 <br />1 <br />I <br />p <br />2p 13 14 13 20 15 13 10 Na Na Na na 0 0 n/a <br /> 0 <br />3 <0.5 0.260 0.25 5 4 80% <br /><0.5 <0.5 <0.5 <0.5 0.3 . <br />Na nla Na Na 0 0 n/a <br /> <0 <br />006 <0.006 <0.006 <0.003 <0.03 0.0045 0.003 8 7 88% <br /><0.03 <0.008 0.005 <0.003 <0.003 . Na nla Na n/a 0 0 n/a <br /> 005 <br /><0 <0.005 <0.005 <0.003 <0.05 0.0068 0.0025 5 5 100 % <br /><0.05 <0.003 . <0.003 <0.003 0.0015 0.0015 3 3 100% <br /> c0.003 <0.003 <0.003 <0 <br />1 1 <br /><0 04 <br />0 <0.1 0.046 0.05 5 3 60°0 <br />0.04 0.04 <0.1 . . . <br />0.03 0.04 0.033 0.03 3 0 0 % <br /> 0.03 0.03 0.04 001 <br /><0 <0.001 <0.001 <0.001 <0.002 0.0008 0.00075 8 8 100 <br /><0.001 <0.002 <0.002 <0.002 <0.002 . 07 <br />0 05 <br />0 <0.05 0.07 0.048 0.05 3 1 33 % <br /> <0.05 . . 0002 <br /><0 <0.002 0.0004 0.0003 6 6 100% <br /><0.002 <0.0002 <0.0002 <0.0002 <0.001 <0.001 . <br />005 <br /><0 005 <br /><0 0.0025 0.0025 6 6 100 % <br /><0.005 <0.005 c0.005 <0.005 <0.005 <0.005 <br /><0.01 . <br /><0.01 . <br /><0.01 <br />0.0050 <br />0.005 <br />1 <br />1 <br />100 % <br /> nla Na nla nla 0 0 nla <br /> <0 <br />005 <0.005 <0.005 <0.005 <0.02 0.0068 0.01 7 7 100% <br /><0.02 <0.02 <0.02 <0.02 . nla nla n/a nla 0 0 Na <br /> 0 <br />2 <0.1 <0.03 0.2 0.054 0.0225 6 4 67% <br /><0.03 <0.03 <0.03 0.03 . n!a n/a nla Na 0 0 Na <br /> Na nla Na Na 0 0 n/a <br /> nla n/a nla nla 0 0 nla <br /> Na n/a Na Na 0 0 n/a <br /> 005 <br /><0 <0.005 <0.005 <0.002 <0.05 0.0067 0.0025 5 5 100 <br /><0.05 <0.002 . <0.002 0.003 0.0017 0.001 3 2 67% <br /> <0.002 0.003 <0.002 01 <br /><0 01 <br /><0 0.005 0.005 5 5 100 % <br /><0.01 <0.01 <0.01 <0.01 <0.01 . <br />Na . <br />nla Na Na 0 0 n/a <br /> <0.0002 <0.0002 0.0001 0.0001 5 5 100 <br /><0.0002 <0.0002 <0.0002 <0.0002 <0.0002 Na n/a Na n/a 0 0 nla <br /> 014 <br />0 0.094 0.081 0.014 0.5 0.180 0.154 8 0 0% <br />0.198 0.23 0.21 0.11 0.5 . 01 <br /><0 c0 <br />01 <0.01 <0.04 0.0131 0.015 8 8 100 <br /><0.02 <0.04 <0.04 c0.04 <0.04 <0.01 . <br />01 <br /><0 . <br />01 <br /><0 005 <br /><0 <0.05 0.006 0.00375 8 8 100 <br /><0.05 <0.005 <0.005 <0.005 <0.005 <0.01 . . . <br />0002 <br /><0 <0.01 0.001 0.0003 6 6 100 % <br /><0.005 <0.001 <0.0002 <0.0002 <0.0002 <0.01 . <br />n/a Na nla n/a 0 0 Na <br /> <0 <br />001 <0.001 0.002 <0.001 <0.05 0.0038 0.0005 8 7 88 <br /><0.05 c0.001 <0.001 <0.001 <0.001 . 005 <br /><0 <0.01 0.005 0.005 6 6 100 % <br /><0.005 <0.01 <0.01 <0.01 <0.01 <0.01 . <br />Na n/a Na Na 0 0 n/a <br /> 01 <br /><0 c0.01 <0.01 <0.005 <0.01 0.0036 0.0025 7 7 100% <br /><0.005 <0.005 <0.005 <0.005 . Na nla Na Na 0 0 nla <br /> 2 0031 <br />0 0 <br />0047 0017 <br />0 0.0029 0.0 Na 0.01Na 0.0 Na 0 0 p <br />0.0059 0.0075 0.0119 0.0034 0.005 . . . Na 0 0 ole <br /> n/a Na nla nla 0 0 Na <br /> 0 1 <br />0 0.05 0.05 2 1 50 % <br />0 0~1 0 . <br />0.1 0.05 0.05 2 1 50% <br />) 0 0~~ 0 0 0 0 2 2 100% <br />. <br />.) 0 <br />0 <br />2 0 4 p,2 1.5 0.5 0.3 6 0 0 <br />0.3 0.3 1.5 0.3 . Na Na Na Na 0 0 n/a <br />IL n/a Na nla nla 0 0 Na <br />) 6 <br />1 2.6 1.6 11 5.03 4.65 6 0 0 % <br />,) <br />4.2 5.7 11 5.1 . <5 0.8 11 4.05 2.7 6 2 33% <br />4.6 2.9 11 0.8 <5. . <br />NOTES: Mean and median statistic calculated using one-half detedion limit (1l2 D.L.) <br />ND = number of non-deteds <br />Results are in mglL unless otherwise noted <br />Page 11 of 25 <br />WhetsYr vne Associates • <br />