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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 />42 <br />40 <br />18 <br /><10 <br />4 <br />3 <br /><10 <br />Alkalinity, Bicarbonate (mg/I as CaCO3) <br />26 <br />0 <br />17 <br />14.1 <br />15.7 <br />0.7 <br />15.6 <br />Alkalinity, Carbonate (mg/I as CaCO3) <br />26 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Alkalinity, Total (mg/I as CaCO3) <br />33 <br />0 <br />14 <br />6 <br />12 <br />2 <br />12.6 <br />Aluminum, Dissolved (mg/I as Al) <br />41 <br />4 <br />5.6 <br /><0.1 <br />1.4 <br />1.3 <br />0.9 <br />Arsenic, Dissolved (mg/I as As) <br />19 <br />18 <br />0.005 <br /><0.005 <br />0.0026 <br />0.0006 <br /><0.005 <br />Barium, Dissolved (mg/I as Ba) <br />7 <br />0 <br />0.56 <br />0.46 <br />0.51 <br />0.04 <br />0.52 <br />Cadmium, Dissolved (mg /I as Cd) <br />41 <br />33 <br />0.001 <br /><0.005 <br />0.0005 <br />0.0005 <br /><0.001 <br />Calcium, Total (mg/I as Ca) <br />41 <br />0 <br />7 <br />4.1 <br />5.3 <br />0.6 <br />5.2 <br />Chloride,Total in Water mg/I <br />40 <br />23 <br />10 <br /><3 <br />1 <br />2 <br /><0.5 <br />Chromium, Dissolved (mg/I as Cr) <br />41 <br />25 <br />0.006 <br /><0.005 <br />0.002 <br />0.001 <br /><0.001 <br />Copper, Dissolved (mg/I as Cu) <br />41 <br />37 <br />0.006 <br /><0.005 <br />0.003 <br />0.001 <br /><0.005 <br />Cyanide Free, mg/I <br />67 <br />66 <br />0.01 <br /><0.05 <br />0.015 <br />0.010 <br /><0.05 <br />Cyanide, Total (mg/I as CN) <br />67 <br />63 <br />0.013 <br /><0.05 <br />0.004 <br />0.003 <br /><0.005 <br />Fluoride, Total (mg/I as F) <br />40 <br />14 <br />0.134 <br /><0.5 <br />0.15 <br />0.07 <br />0.0895 <br />Hardness, Total (mg/I as CaCO3) <br />42 <br />0 <br />35 <br />15.5 <br />20.8 <br />3.7 <br />19.95 <br />Iron, Dissolved (mg/I as Fe) <br />41 <br />2 <br />4.4 <br /><0.05 <br />0.75 <br />0.82 <br />0.511 <br />Lead, Dissolved (mg/I as Pb) <br />41 <br />21 <br />0.011 <br /><0.005 <br />0.003 <br />0.002 <br /><0.001 <br />Magnesium, Total (mg/I as Mg) <br />41 <br />0 <br />4.2 <br />1.2 <br />1.8 <br />0.6 <br />1.67 <br />Manganese, Dissolved (mg/I as Mn) <br />41 <br />23 <br />0.039 <br /><0.05 <br />0.018 <br />0.009 <br /><0.01 <br />Mercury, Total (mg/I as Hg) <br />35 <br />33 <br />0.0002 <br /><0.0002 <br />0.00009 <br />0.00003 <br /><0.0002 <br />Molybdenum, Dissolved (mg/I as Mo) <br />7 <br />7 <br /><0.01 <br /><0.01 <br />0.005 <br />ND <br /><0.01 <br />Nickel, Dissolved (mg/I as Ni) <br />41 <br />38 <br />0.011 <br /><0.02 <br />0.005 <br />0.003 <br /><0.005 <br />Nitrate Nitrogen, Total (mg /I as N) <br />41 <br />0 <br />1.1 <br />0.787 <br />0.95 <br />0.09 <br />0.938 <br />Nitrite Nitrogen, Total (mg/I as N) <br />41 <br />40 <br />0.05 <br /><0.05 <br />0.03 <br />0.00 <br /><0.05 <br />Nitrite plus Nitrate, mg/I as Nitrogen <br />24 <br />0 <br />1.07 <br />0.8 <br />0.95 <br />0.07 <br />0.9455 <br />Nitrogen, Ammonia, Total (mg/I as N) <br />42 <br />41 <br />0.05 <br /><0.2 <br />0.05 <br />0.04 <br /><0.05 <br />Oil and Grease Visual (No =0, Yes =1) <br />11 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Oxidation Reduction Potential (my) <br />20 <br />0 <br />372.6 <br />130.2 <br />254.8 <br />55.2 <br />245.35 <br />Oxygen, Dissolved mg/L <br />49 <br />0 <br />10.5 <br />2.7 <br />7.7 <br />1.5 <br />7.7 <br />pH, Field, Standard Units <br />66 <br />0 <br />7.95 <br />5.49 <br />6.30 <br />0.39 <br />6.315 <br />Potassium, Total mg/I as K) <br />41 <br />0 <br />6 <br />0.536 <br />1.33 <br />0.97 <br />1 <br />Selenium, Dissolved (mg/I as Se) <br />41 <br />39 <br />0.006 <br /><0.05 <br />0.003 <br />0.004 <br /><0.005 <br />Silica, Total (mg/I as Si02) <br />4 <br />0 <br />20 <br />14 <br />16 <br />3 <br />15 <br />Silver, Dissolved (mg /I as Ag) <br />41 <br />40 <br />0.001 <br /><0.001 <br />0.0004 <br />0.0002 <br /><0.001 <br />Sodium, Total (mg/I as Na) <br />41 <br />0 <br />3.32 <br />2 <br />2.6 <br />0.4 <br />2.54 <br />Specific Conductance,Field (umhos /cm @ 25C) <br />65 <br />0 <br />680 <br />10 <br />60 <br />79 <br />50 <br />Strontium, Total (mg/I as Sr) <br />7 <br />0 <br />0.71 <br />0.25 <br />0.38 <br />0.16 <br />0.36 <br />Sulfate, Total (mg/I as 504) <br />40 <br />31 <br />18 <br /><10 <br />7 <br />4 <br /><10 <br />Temperature, Water (Degrees Centigrade) <br />66 <br />0 <br />12.7 <br />5.3 <br />7.5 <br />1.3 <br />7.35 <br />Total Dissolved Solids, mg /I <br />39 <br />0 <br />370 <br />22 <br />80 <br />73 <br />68 <br />Total Suspend Solids, mg /I <br />42 <br />17 <br />460 <br /><10 <br />45 <br />89 <br />14.5 <br />Turbidity,Lab Nephelometric Turbidity Units, NTU <br />7 <br />0 <br />400 <br />7.5 <br />161 <br />157 <br />180 <br />Water Level,Distance From Measuring Point (Feet) <br />61 <br />0 <br />28.31 <br />6.88 <br />20.18 <br />4.01 <br />21.2 <br />Weak Acid Dissociable Cyanide, mg /I <br />67 <br />66 <br />0 01 <br /><0.05 <br />0.004 <br />0 003 <br /><0.005 <br />Zinc, Dissolved (mg/I as Zn) <br />41 <br />30 <br />0.05 <br /><0.05 <br />0.02 <br />0.01 <br /><0.05 <br />TABLE 6 -5 <br />SAMPLE LOCATION: GVMW -1B <br />DRAINAGE: 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 />