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TABLE 24. WATER QUALITYIN RALSTON CREEK <br />1998 - 2007 <br />STATION SW-LLNG <br /> G SVJ ~LHG SW -LLNG SW ~LHG SW LLHG SW -LLNG SW-LLNG SW ~LHG MIN M AX M FJ4N ME DI/+n w ~rvi ~ .~ A^ <br />LHG SW-LLNG SW-LLNG SW-LLNG SWILHG SW-LLNG SW~LHG SW-LLNG SWILHG SWILHG SWLLHG SWLLH <br />/31/06 227/06 10/26/06 11 <br />LHG SW4 <br />~LHG SW4 /30/06 12!27/06 1/31/07 3/29/07 627/07 9/ 7 <br />8 11 0 0 <br />S . <br />. <br />VJ-LLNG SW <br />25106 228/05 322/05 421/05 5/3t/OS 622/05 7/31/05 7/31/05 8/30/05 10/26/05 11/30/05 72/31/05 1 8.06 7.3 8.5 7.88 <br />7 . <br />453 11 0 0 <br />H std units <br />p ( ) 1228/04 1 453 <br />252 t43 <br />105 601 <br />382 41 <br />227 227.5 20 0 0 <br />Conductivity (umhos) 124 206 <br />1 <br />36.9 <br />8 <br />2 <br />10 <br />2 <br />Total tlissoNad solids 142 130 160 150 155 4 0 0 <br />Total sus ended solids <br />Na <br />Na <br />Na <br />Na <br />0 <br />0 a <br />Hardness, total 142 33.6 142 84.6 79 10 0 0 <br />Caroonale 76 101 38 100 63.8 58.5 4 0 0 <br />Bicarbonate 69 <br />119 <br />28 <br />230 <br />87.1 <br />82 <br />18 <br />0 <br />Alkalis ,Dissolved 62 82 <0 8 ' 0 <br />Alkalinity, total 58 p <7 15 <br />0 0 10 3 30% <br />Nitrate Narogen 48.9 14.2 48.9 30.3 33.25 18 0 D <br />Ammonia, total 26 38.8 <br />18.2 <br />7.39 <br />52 <br />22.6 <br />14.8 <br />18 <br />0 0 <br />Calcium 26.6 <br />7 <br />8 13.6 74.9 4.5 17 11.1 12 17 0 0 <br />Sodium, dissolved 122 . <br />6 <br />9 11.3 <br />3.3 <br />7.1 <br />3.3 <br />2.25 <br />2.4 <br />17 <br />0 0 <br />Magnesium, dissolved . <br />1 1 1'6 68 14 160 68.2 58.5 20 0 0 <br />Potassium, dissolved 74 55 <br />0.5 <br />0.8 <br />0.58 <br />0.6 <br />5 <br />0 <br />Sulfate 22 32 9 32 19.9 17.5 20 0 0 <br />Fluoride, total 17 37 Na Na Na Na 0 0 Na <br />CMOrida 25 <br /><0 <br />2 <br /><0 <br />2 <br /><0 <br />2 <br /><0.2 <br /><0.1 <br /><0.5 <br />0.13 <br />0.1 <br />19 <br />77 <br />Phosphorous <0 <br />2 <0.2 <0.2 . . . <0.2 0.068 0.54 0.136 0.1 10 5 60% <br />Aluminum, dissolved <0.2 . <br />0 <br />1 <p 1 001 <br />` `0 <br />001 `0.001 `0.001 `0.05 0.003 0.0005 22 19 88% <br />Aluminum, toUl <0.1 ' <br />1 `0.001 `0.001 `0.001 0. . `0.001 `0.05 0.017 0.0005 9 8 89% <br />Antlmony, dissolved `0.001 `0.60 <br />`0 <br />05 `0.05 `0.003 `0.05 0.0068 0.0025 5 5 700% <br />Antimony, total `0.05 . c0.1 `0.001 <0.1 0.0063 0.0015 13 13 100% <br />Asenk, dissolved `0 <br />001 `0.001 0.03 <0.1 0.044 0.05 5 3 80% <br />Arsenic, total `0.001 . 0.04 0.04 0.04 0.04 3 0 0% <br />dissolved <br />Barium <br />`0.001 <br />`0.002 <br />0.0008 <br />0.00075 <br />8 <br />8 1 <br />, <br />total <br />Barium `0.05 0.06 0.037 0.025 3 2 67% <br />, <br />dissoNad <br />Be Ilium `0.0002 `0.002 0.000 0.0003 6 6 100% <br />, <br />Boron, total `0.005 c0.OD5 0.003 0.0025 6 6 100% <br />Cadmium, dissolved `0.01 `0.01 0.0050 0.005 7 1 100% <br />Chromium, dissolved n/a Ne Na Na 0 0 Na <br />C snide, total <br />001 <br />0 <br />`0.007 <br />`0.007 <br />`0.001 <br />`0.005 <br />`0.001 <br />`0.02 <br />0.00 <br />0.0025 <br />oo2s <br />o <br />21 <br />1o <br />19 <br />a 90% <br />Co er <br />dissolved <br />Copper `0.005 01 <br />`00 `0.005 <br />`0'01 . <o.ops <br />`0.03 o.po2 <br />`0.03 `0.01 <br />0.39 0.0 <br />0.077 . <br />0.036 76 7 44% <br />, <br />Capper, total `0.01 . <br />0 <br />06 0.04 0.2 0.03 0.81 0.2 0.2 9 1 11% <br />Iron, disaoNed `0.03 . <br />D ~ O.Ofi <br />Na <br />Na <br />Na <br />Na <br />0 <br />0 a <br />Iron, total 0.04 <br />`0 <br />03 <br />`0 <br />03 <br />`0 <br />63 <p.03 6.03 0.03 0.02 0.015 5 5 100% <br />Iron, suspended `0.03 . . . 0.03 0.508 0.18 0.066 5 2 40% <br />Iron, Ferrous (Fe2+) 0 31 `0.03 <p.002 c0.05 0.0067 0.0025 5 5 100% <br />Ferric Fe3+ <br />Iron `0.04 `0.005 <O.OOt `0.05 0.0090 0.0025 13 12 92% <br />, <br />Lead, dissolved `0.05 `0.05 <br />`0 <br />01 <br />01 <br />`0 <br />`0.01 <br />`0.01 <br />0.02 <br />c0.01 <br />0.07 <br />0.009 <br />0.005 <br />18 <br />8 <br />i6 <br />3 33% <br />Lead, total <D.OS `0.01 c0.01 . . 0.03 `0.01 0.03 0.01611 0.02 <br />Manganese, dissolved <O.Ot 0 ~ 0.02 `0.0002 `0.0002 0.0001 0.0001 5 5 100% <br />Man anew, total `0.01 `0.0001 `0.0007 `0.001 0.00023 0.00005 10 10 100% <br />Mercury, dissolved `0.001 `0'007 01 <br />0 009 <br />0 078 <br />0 0.015 0.023 `0.005 0.31 0.068 0.018 22 5 23% <br />Mercury, toUl `6'001 `0 <br />005 6'016 . . . `0.07 `0.04 0.0131 0.015 8 8 700% <br />Molybdenum, dissolved `0.005 . `0.005 `0.05 0.0063 0.00375 8 8 100% <br />Nickel, dissolved `0.0002 `0.01 0.0014 0.0003 6 6 100% <br />dissolved <br />Selenium `0.001 <p.001 `0.01 0.6023 0.0005 10 10 100% <br />, <br />Silver, dissolved <0 01 <D.Ot <br />`0 <br />001 <br />`0 <br />001 <br />`0.001 <br />`0.001 <br />`0.001 <br />`0.001 <br />`0.05 <br />0.0016 <br />0.0005 <br />22 <br />6 <br />22 10 <br />6 100% <br />Silver, total `0.01 `0.001 `0.001 . . `0.665 `0.01 0.0048 0.005 <br />dissolved <br />Thallium `0.001 `0.001 c0.7 0.0 0.0005 9 9 700% <br />, <br />Vanadium, dissolved <O 1 <0.1 <br />`0.605 <br />`0.01 <br />0.004 <br />0.005 <br />7 <br />Thallium, total c0.1 <br />0.00 <br />8 `0.005 <br />0.014 <br />0.0055 <br />0.005 <br />9 <br />7 <br />Zinc, disaoNed `0 <br />01 `0.01 <0 Ot <br />105 0.112 <br />102 0 <br />168 0 <br />0 <br />0.107 <br />0.0798 <br />0.136 <br />0.0972 <br />0 14 <br />010 <br />2 <br />0024 <br />0 <br />0065 <br />0 <br />66 <br />38 58% <br />Zinc, total <br />d <br />di <br />lv <br />. <br />0.0163 0.0184 0.024 0.015 <br />0.0069 0.0075 0.0124 0.0402 0.0416 <br />. <br />. <br />. <br />0.0632 0.0927 <br />0063 0.0014 `0.0003 0.0009 <br />0003 `0 <br />0004 `0 <br />0 <br />0.0032 0005 <br />`0.0001 <br />0113 <br />0 <br />. <br />0713 <br />0 <br />. <br />0.0113 <br />. <br />0.0113 <br />7 <br />0 0% <br />sso <br />e <br />Uranium, <br />d <br />d 0003 `0.0003 c0.0003 `0.0003 <br />`0 0.0023 0.0007 0.0005 `0.6003 . <br />. <br />. 00713 . <br />0 . <br />0 <br />1 0 <br />05 0.05 2 0 D% <br />e <br />Uranium, suspen <br />Uranium, total . 0 . <br />0.4 . <br />0.2 0.2 2 0 0% <br /> Thorium-228, dis. CiIL 0 0 0.000 0 2 0 0% <br /> Thoriurt~230, dis. (pCi/L) <br /><0.2 0.7 <br />0 <br />. 0.1 <br />4.6 <br />0.8 <br />0.8 <br />64 <br />9 14 <br /> Thorium232, dis. (pCilL) 4 0.4 <br />2 0 <br />2 <0 <br /><0 0.4 0.6 0.6 0.6 0.7 0.6 <0.2 0.8 0 0.8 0.1 0.1 82 39 63% <br /> Radium•226, dis. (pCiIL) 0.9 <0.2 <0.2 0.5 . <br />. <br />. <br />2 <0.2 <br />2 <0 <br />2 <0 <br /><0 <br />0.2 c0.1 <0.2 0.4 <0.2 <0.1 <br /><0.2 <br />0.2 <br />0.2 <br />0.1 <br />0.1 <br />1 <br />1 100% <br /> Radium228, sus . UI. <0.2 <0.2 <0.2 <0.7 . <br />. <br />. 3.7 30 11.6 6 5 0 0% <br /> Radium226, total (pCi/L) c1.6 27 8.8 4.3 5 1 20% <br /> Gross Alpha, dis. (pCUL) <br /> Gross Beta, dis. CUL <br />WhebLaneAVOC4aOet1 <br />Page 22 of 25 <br />