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• <br /> <br />DESCRIPTIVE STATISTICS GRWlND WATER WElL 20•IO COWTINUED <br />JULY 1, ],999 -MARCH 31, 2000 <br /> <br />Parameter (m /I EPA Method TOTAL <br />SAMPLES BELOW <br />DETECTION MAXIMUM <br />VALUE MINIMUM <br />VALUE <br />MEAN VALUE STANDARD <br />DEVIATION <br />Bromide M3001C 9 9 5 0.05 1.00 1.69 <br />Carbon, dissolved or anic M415.1 Combustion 9 0 20 3 10.6 5.1 <br />Cation AnionBalance o Calculation 9 3 16.3 •20.9 1.6 11.3 <br />Sum of Anions me /L 8 0 31.5 0 20.52 9.69 <br />Sum of Cations meq/L 8 0 29.2 0 20.87 9.08 <br />Chloride M325~2 Colorimetric (RFA) 8 0 180 0 66 53 <br />Cond @ 25C (umhos/cm) M 120. ] Meter 9 0 2650 1380 1889 502 <br />Fluoride M340.21SE 8 0 10 0 7.3 3.0 <br />Hardness as CaC03 SM2340B ~ Calculation 9 0 198 103 162 32 <br />Nitrate as N, dissolved Calculation: N03N02 N02 9 6 0.2 0.03 0.11 0.07 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 9 6 0.2 0.03 0.11 0.07 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 9 8 0.1 0.005 0.052 0.039 <br />pH (units) M150.lElectrometric 9 0 8.6 8.2 8.4 0.1 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 9 1 0.14 0.01 0.069 0.047 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 9 4 0.3 0.0025 0.116 0.100 <br />Total Dissolved Solids M 160.1 ~ Gravimetric 9 0 1585 950 1228 245 <br />Sodium Absorption Ratio in H2O USGS 1173878 9 0 25 10.2 15.66 5.13 <br />Sulfate M375.3 -Gravimetric 9 0 190 100 151 34 <br />Sulfide as S SM427C ~ Mod Meth I Blue 9 1 12 0.01 6.22 3.79 <br />TDS (colt) Calculation 9 0 1650 959 1264 273 <br />TDS ratio Ratio measured/calculatetl 8 0 1.12 0 0.87 0.35 <br />Temperature De rees C (Field) 9 0 15.3 8.7 11.8 2.3 <br />Gross Alpha Result (pCi/L) M9310 9 0 29 0 13.0 9.8 <br />Gross Alpha Error (pCi/L) M9310 9 0 15 5.5 10.6 2.7 <br />p a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />9.2 <br />4.5 <br />6.7 <br />1.5 <br />Gross Beta Result (pCi/L) M9310 9 0 10 0.2 5.3 3.5 <br />Gross Beta Error (pCi/L) M9310 9 0 8.8 4.2 6.9 1.9 <br />e a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />12 <br />6.2 <br />9.2 <br />2.4 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />