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<br />DESCRIPTIVE STATISTICS GROUND WA71:R WELL 21.4U CONTINUED <br />JULY 1, 1999 -MARCH 31, 2tI0D <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 2.06 2.22 <br />Carbon, dissolved or anic M415.1 Combustion 9 0 20 9 14.3 3.5 <br />Cation Anion Balance o Calculation 9 3 6.1 3.3 2.0 3.1 <br />Sum of Anions meq/L 9 0 250 209 226.00 14.81 <br />Sum of Cations meq/L 9 0 247 223 234.67 7.48 <br />Chloride M325~2 Colorimetric (RFA) 9 0 530 440 466 30 <br />Cond @ 25C (umhos/cm) M 120.1 ~ Meter 9 0 17200 13800 16067 962 <br />Fluoride M340.21SE 9 0 31 22 26.0 2.9 <br />Hardness as CaC03 SM2340B Calculation 9 0 61 45 48 6 <br />Nitrate as N, dissolved Calculation: N03N02~N02 9 7 0.3 0.06 0.16 0.08 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 9 7 0.3 0.06 0.16 0.08 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 9 9 0.1 0.005 0.067 0.034 <br />pH (units) M150.1 Electrometric 9 0 8.5 7.7 8.0 0.2 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 9 0 0.8 0.57 0.667 0.090 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 9 3 0.9 0.05 0.543 0.289 <br />Total Dissolved Solids M160.1 -Gravimetric 9 0 13200 12300 12678 299 <br />Sodium Absorption Ratio in H2O USGS 11738-78 9 0 355 314 338.44 13.73 <br />Sulfate M375.3 ~ Gravimetric 9 7 200 5 44 62 <br />Sulfide as S SM427C Mod Meth I Blue 9 4 0.5 0.08 0.17 0.13 <br />TDS (talc) Calculation 9 0 13300 11600 12322 624 <br />TDS ratio Ratio measured/calculatetl 9 0 1.12 0.94 1.03 0.06 <br />Temperature De rees C (Field) 9 0 15.3 8.7 11.8 2.3 <br />Gross Alpha Result (pCi/L) M9310 9 0 240 0 43.1 75.5 <br />Gross Alpha Error (pCi/L) M9310 9 0 120 32 79.3 27.1 <br />p a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />89 <br />43 <br />64.0 <br />15.4 <br />Gross Beta Result (pCi/L) M9310 9 0 220 0 69.3 66.2 <br />Gross Beta Error (pCi/L) M9310 9 0 90 42 64.8 15.2 <br />e a inimum a ec a e c ivl y <br />(pCi/L) M9310 <br />9 <br />0 <br />110 <br />62 <br />83.8 <br />16.1 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />