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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 />18 <br />18 <br /><10 <br /><10 <br />10 <br />5 <br /><10 <br />Alkalinity, Bicarbonate (mg/I as CaCO3) <br />18 <br />0 <br />220 <br />147 <br />181 <br />181 <br />179.5 <br />Alkalinity, Carbonate (mg/I as CaCO3) <br />18 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Alkalinity, Total (mg/I as CaCO3) <br />5 <br />0 <br />180 <br />145 <br />162 <br />162 <br />157 <br />Aluminum, Dissolved (mg/I as AI) <br />18 <br />15 <br />0.116 <br /><0.05 <br />0.06 <br />0.04 <br /><0.05 <br />Arsenic, Dissolved (mg/I as As) <br />4 <br />4 <br /><0.005 <br /><0.005 <br />0.005 <br />0.0025 <br /><0.005 <br />Arsenic,Total Recoverable in Water as As mg/I <br />14 <br />14 <br /><0.005 <br /><0.005 <br />0.005 <br />0.0025 <br /><0.005 <br />Bicarbonate (mg/I as HCO3 ion) <br />14 <br />0 <br />197 <br />147 <br />175 <br />175 <br />172.5 <br />Cadmium, Dissolved (mg/I as Cd) <br />18 <br />18 <br /><0.001 <br /><0.005 <br />0.001 <br />0.001 <br /><0.001 <br />Calcium, Total (mg /I as Ca) <br />18 <br />0 <br />112 <br />25.5 <br />90.0 <br />90.0 <br />95 <br />Carbonate (mg/I as CO3 ion) <br />14 <br />14 <br /><10 <br /><10 <br />10 <br />5 <br /><10 <br />Chloride,Total in Water mg/I <br />18 <br />0 <br />5.68 <br />2 <br />3.40 <br />3.40 <br />3.25 <br />Chromium, Dissolved (mg/I as Cr) <br />18 <br />16 <br />0.002 <br /><0.001 <br />0.001 <br />0.001 <br /><0.001 <br />Copper, Dissolved (mg/I as Cu) <br />18 <br />18 <br /><0.005 <br /><0.005 <br />0.005 <br />0.0025 <br /><0.005 <br />Cyanide Free, mg/I <br />18 <br />18 <br /><0.01 <br /><0.01 <br />0.01 <br />0.005 <br /><0.01 <br />Cyanide, Total (mg/I as CN) <br />18 <br />18 <br /><0.01 <br /><0.01 <br />0.01 <br />0.005 <br /><0.01 <br />Fluoride, Total (mg/I as F) <br />18 <br />0 <br />0.469 <br />0.207 <br />0.305 <br />0.305 <br />0.293 <br />Hardness, Total (mg/I as CaCO3) <br />18 <br />0 <br />534 <br />104 <br />387 <br />387 <br />400 <br />Iron, Dissolved (mg /I as Fe) <br />18 <br />17 <br />0.277 <br /><0.05 <br />0.06 <br />0.04 <br /><0.05 <br />Lead, Dissolved (mg/I as Pb) <br />18 <br />18 <br /><0.001 <br /><0.001 <br />0.001 <br />0.0005 <br /><0.001 <br />Magnesium, Total (mg/I as Mg) <br />18 <br />0 <br />49.2 <br />9.7 <br />38.4 <br />38.4 <br />39.65 <br />Manganese, Dissolved (mg/I as Mn) <br />18 <br />5 <br />0.29 <br /><0.05 <br />0.14 <br />0.13 <br />0.1275 <br />Mercury, Total (mg/I as Hg) <br />18 <br />18 <br /><0.0002 <br /><0.0002 <br />0.0002 <br />0.0001 <br /><0.0002 <br />Nickel, Dissolved (mg/I as Ni) <br />18 <br />18 <br /><0.005 <br /><0.005 <br />0.005 <br />0.0025 <br /><0.005 <br />Nitrate Nitrogen, Total (mg/I as N) <br />18 <br />0 <br />0.692 <br />0.087 <br />0.339 <br />0.339 <br />0.2995 <br />Nitrite Nitrogen, Total (mg/I as N) <br />18 <br />16 <br />0.281 <br /><0.05 <br />0.06 <br />0.04 <br /><0.05 <br />Nitrite plus Nitrate, mg/I as Nitrogen <br />13 <br />0 <br />0.692 <br />0.087 <br />0.345 <br />0.345 <br />0.214 <br />Nitrogen, Ammonia, Total (mg/I as N) <br />18 <br />17 <br />0.054 <br /><0.05 <br />0.05 <br />0.03 <br /><0.05 <br />Oil and Grease Visual (No=0, Yes =1) <br />5 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Oxygen, Dissolved mg/L <br />17 <br />0 <br />2.9 <br />0 <br />0.6 <br />0.6 <br />0.1 <br />pH, Field, Standard Units <br />18 <br />0 <br />8 <br />7.34 <br />7.69 <br />7.69 <br />7.675 <br />Potassium, Total mg/I as K) <br />18 <br />1 <br />2 <br /><0.5 <br />1.2 <br />1.2 <br />1.145 <br />Selenium, Dissolved (mg/I as Se) <br />18 <br />13 <br />0.016 <br /><0.005 <br />0.006 <br />0.004 <br /><0.005 <br />Silver, Dissolved (mg /I as Ag) <br />18 <br />18 <br /><0.001 <br /><0.001 <br />0.001 <br />0.0005 <br /><0.001 <br />Sodium, Total (mg/I as Na) <br />18 <br />0 <br />163 <br />18.4 <br />43.2 <br />43.2 <br />26.05 <br />Specific Conductance,Field (umhos /cm @ 25C) <br />18 <br />0 <br />1067 <br />367 <br />826 <br />826 <br />894.5 <br />Sulfate, Total (mg/I as 504) <br />18 <br />0 <br />382 <br />227 <br />310 <br />310 <br />306.5 <br />Temperature, Water (Degrees Centigrade) <br />18 <br />0 <br />9.2 <br />6.4 <br />7.30 <br />7.30 <br />7.05 <br />Total Dissolved Solids, mg /I <br />17 <br />0 <br />774 <br />516 <br />609 <br />609 <br />622 <br />Total Suspend Solids, mg/I <br />18 <br />15 <br />45 <br /><10 <br />15 <br />11 <br /><10 <br />Water Level,Distance From Measuring Point (Feet) <br />30 <br />0 <br />253.55 <br />102.08 <br />165.68 <br />165.68 <br />166.435 <br />Weak Acid Dissociable Cyanide, mg/I <br />18 <br />18 <br /><0.01 <br /><0.01 <br />0.01 <br />0.005 <br /><0.01 <br />Zinc, Dissolved (mg /I as Zn) <br />18 <br />18 <br /><0.05 <br /><0.05 <br />0.05 <br />0.025 <br /><0.05 <br />TABLE 6-17 <br />SAMPLE LOCATION: GVMW -10 <br />DRAINAGE: GRASSY VALLEY <br />PERIOD OF RECORD: 1998 -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 />Dissolved arsenic was analyzed from 2002. Total recoverable arsenic was analyzed through 2001. Both forms are provided to indicate the entire analytical history. <br />