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PARAMETER <br />Number of <br />Analyses <br />Number of <br />Non -Detect <br />Analyses <br />Maximum <br />Value <br />Minimum <br />Value <br />Average <br />Value <br />Standard <br />Deviation <br />Median <br />Value <br />Acidity, Total (mg/I as CaCO3) <br />46 <br />38 <br />40 <br /><10 <br />5 <br />7 <br /><1 <br />Alkalinity, Bicarbonate (mg/I as CaCO3) <br />22 <br />2 <br />39 <br /><10 <br />20 <br />7 <br />20.5 <br />Alkalinity, Carbonate (mg/I as CaCO3) <br />22 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Alkalinity, Total (mg/I as CaCO3) <br />33 <br />2 <br />24 <br /><10 <br />16 <br />5 <br />16 <br />Aluminum, Dissolved (mg/I as Al) <br />47 <br />12 <br />1.11 <br /><0.1 <br />0.2 <br />0.2 <br />0.2 <br />Arsenic, Dissolved (mg/I as As) <br />14 <br />14 <br /><0.005 <br /><0.005 <br />0.003 <br />ND <br /><0.005 <br />Arsenic,Total Recoverable in Water as As mg/I <br />34 <br />30 <br />0.012 <br /><0.005 <br />0.003 <br />0.002 <br /><0.005 <br />Barium, Dissolved (mg/I as Ba) <br />9 <br />1 <br />0.1 <br /><0.05 <br />0.07 <br />0.02 <br />0.06 <br />Cadmium, Dissolved (mg/I as Cd) <br />47 <br />11 <br />0.00287 <br /><0.005 <br />0.0012 <br />0.0007 <br />0.001 <br />Calcium, Total (mg/I as Ca) <br />43 <br />0 <br />41.7 <br />9.2 <br />21.8 <br />8.5 <br />20 <br />Chloride,Total in Water mg/I <br />47 <br />1 <br />75 <br /><5 <br />13 <br />17 <br />6 <br />Chromium, Dissolved (mg/I as Cr) <br />47 <br />32 <br />0.018 <br /><0.005 <br />0.003 <br />0.003 <br /><0.001 <br />Copper, Dissolved (mg/I as Cu) <br />47 <br />1 <br />0.11 <br /><0.005 <br />0.016 <br />0.016 <br />0.012 <br />Cyanide Free, mg/I <br />49 <br />47 <br />1.4 <br /><0.05 <br />0.05 <br />0.20 <br /><0.02 <br />Cyanide, Total (mg/I as CN) <br />49 <br />3 <br />2.4 <br /><0.01 <br />0.10 <br />0.34 <br />0.043 <br />Fluoride, Total (mg/I as F) <br />47 <br />19 <br />0.7 <br /><0.5 <br />0.4 <br />0.1 <br />0.436 <br />Hardness, Total (mg/I as CaCO3) <br />47 <br />0 <br />135 <br />34 <br />75 <br />27 <br />68 <br />Iron, Dissolved (mg/I as Fe) <br />47 <br />4 <br />0.563 <br /><0.05 <br />0.15 <br />0.14 <br />0.1 <br />Lead, Dissolved (mg/I as Pb) <br />47 <br />36 <br />0.006 <br /><0.005 <br />0.002 <br />0.001 <br /><0.005 <br />Magnesium, Total (mg /I as Mg) <br />43 <br />0 <br />9.6 <br />2.5 <br />5.3 <br />1.7 <br />4.9 <br />Manganese, Dissolved (mg/I as Mn) <br />47 <br />20 <br />0.13 <br /><0.05 <br />0.03 <br />0.02 <br />0.008 <br />'ercury, Total (mg/I as Hg) <br />37 <br />19 <br />0.054 <br /><0.0002 <br />0.0020 <br />0.0089 <br /><0.0001 <br />,olybdenum, Dissolved (mg/I as Mo) <br />9 <br />0 <br />0.069 <br />0.02 <br />0.04 <br />0.02 <br />0.04 <br />Nickel, Dissolved (mg/I as Ni) <br />47 <br />36 <br />0.06 <br /><0.05 <br />0.01 <br />0.01 <br /><0.005 <br />Nitrate Nitrogen, Total (mg/I as N) <br />47 <br />0 <br />12.4 <br />1.1 <br />5.0 <br />2.0 <br />4.99 <br />Nitrite Nitrogen, Total (mg/I as N) <br />47 <br />43 <br />0.55 <br /><0.05 <br />0.04 <br />0.08 <br /><0.05 <br />Nitrite plus Nitrate, mg/I as Nitrogen <br />38 <br />0 <br />12.4 <br />1.1 <br />5.4 <br />2.1 <br />5.1 <br />Nitrogen, Ammonia, Total (mg/I as N) <br />47 <br />42 <br />2.9 <br /><0.2 <br />0.1 <br />0.4 <br /><0.05 <br />Oil and Grease Visual (No =0, Yes =1) <br />4 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Oxidation Reduction Potential (my) <br />14 <br />0 <br />344.4 <br />163.3 <br />260.5 <br />63.1 <br />246.45 <br />Oxygen, Dissolved mg/L <br />46 <br />0 <br />284 <br />4.4 <br />13.5 <br />40.8 <br />7.5 <br />pH, Field, Standard Units <br />56 <br />0 <br />6.67 <br />5.52 <br />6.09 <br />0.25 <br />6.09 <br />Potassium, Total mg/I as K) <br />43 <br />0 <br />13.5 <br />1.78 <br />3.40 <br />1.95 <br />3 <br />Selenium, Dissolved (mg/I as Se) <br />47 <br />46 <br />0.005 <br /><0.025 <br />0.003 <br />0.001 <br /><0.005 <br />Silica, Total (mg/I as Si02) <br />4 <br />0 <br />25 <br />18 <br />21 <br />3 <br />20.5 <br />Silver, Dissolved (mg/I as Ag) <br />47 <br />44 <br />0.08 <br /><0.001 <br />0.002 <br />0.012 <br /><0.0005 <br />Sodium, Total (mg/I as Na) <br />43 <br />0 <br />31.9 <br />15 <br />21.1 <br />3.7 <br />20.6 <br />Specific Conductance,Field (umhos /cm @ 25C) <br />55 <br />0 <br />463 <br />4.29 <br />258 <br />84 <br />254 <br />Strontium, Total (mg/I as Sr) <br />9 <br />0 <br />0.39 <br />0.18 <br />0.28 <br />0.08 <br />0.29 <br />Sulfate, Total (mg/I as 504) <br />47 <br />0 <br />120 <br />40.1 <br />65.0 <br />17.0 <br />63.2 <br />Temperature, Water (Degrees Centigrade) <br />56 <br />0 <br />45.4 <br />3.1 <br />8.3 <br />5.9 <br />7.2 <br />Total Dissolved Solids, mg/I <br />45 <br />0 <br />320 <br />117 <br />217 <br />53 <br />220 <br />Total Suspend Solids, mg/I <br />47 <br />4 <br />930 <br /><10 <br />165 <br />224 <br />76 <br />Turbidity,Lab Nephelometric Turbidity Units, NTU <br />9 <br />0 <br />430 <br />18 <br />138 <br />126 <br />100 <br />Water Level,Distance From Measuring Point (Feet) <br />72 <br />0 <br />30 5 <br />18.3 <br />24 1 <br />3.6 <br />23 17 <br />Weak Acid Dissociable Cyanide, mg/I <br />49 <br />16 <br />1 <br /><0.01 <br />0.03 <br />0.14 <br />0.011 <br />Zinc, Dissolved (mg/I as Zn) <br />47 <br />17 <br />0.129 <br /><0.05 <br />0.04 <br />0.02 <br />0.027 <br />TABLE 6 -6 <br />AMPLE LOCATION: GVMW -2B <br />JRAINAGE: GRASSY VALLEY <br />PERIOD OF RECORD: 1994 -2011 <br />ND = Not determined. Applicable in two cases. number of analyses = 1; or all analyses are non - detect <br />Non - detect analyses are set at 1/2 the detection limit for average and standard deviation calculations <br />Median calculations use the laboratory analyses with less than detection values as negative <br />'hssolved arsenic was analyzed up to 1995 and from 2001 Total recoverable arsenic was analyzed from 1995 -2001. Both forms are provided to indicate the entire analytical history <br />