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<br /> <br />DESCRIPTIVE STATISTICS GRlkiND WAFER W£tt 20-1 CONTINUED <br />JULY 1, 1999 - MARCIi 81, 21300 <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 4 3 5 1 3.00 2.31 <br />Carbon, dissolved or anic M415.1 Combustion 4 0 50 3 30.5 20.9 <br />Cation~Anion Balance o Calculation 4 3 20 -2.9 3.9 10.8 <br />Sum of Anions me /L 4 0 1080 880 982.25 86.68 <br />Sum of Cations meq/L 4 0 1320 928 1070.00 177.32 <br />Chloride M325~2 Colorimetric (RFA) 4 0 14200 5480 10445 3728 <br />Cond ~ 25C (umhos/cm) M120.1 -Meter 4 0 68900 54900 59325 6443 <br />Fluoride M340.21SE 4 0 47.4 38.2 42.2 4.3 <br />Hardness as CaC03 SM2340B -Calculation 4 2 66 0.5 21 31 <br />Nitrate as N, dissolved Calculation: N03N02~N02 4 4 0.2 0.1 0.15 0.06 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 4 4 0.2 0.1 0.15 0.06 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 4 4 0.1 0.05 0.075 0.029 <br />pH (units) M150.lElectrometric 4 0 7.9 7.7 7.8 0.1 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 4 0 8.2 4.3 6.250 1.634 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 4 0 11.6 1 6.040 4.344 <br />Total Dissolved Solids M160.1 -Gravimetric 4 0 63600 56200 59025 3260 <br />Sodium Absorption Ratio in H2O USGS 11738-78 4 2 3170 0.015 1077.51 1494.93 <br />Sulfate M375.3 ~ Gravimetric 4 1 200 5 91 82 <br />Sulfide as S SM427C -Mod Meth I Blue 4 0 8 0.51 2.88 3.45 <br />TDS (talc) Calculation 4 0 59100 51200 55725 3606 <br />TDS ratio Ratio measured/calculated 4 0 1.1 1 1.06 0.05 <br />Temperature De rees C (Field) 4 0 15.3 12.5 13.7 1.2 <br />Gross Alpha Result (pCi/L) M9310 4 0 770 0 192.5 385.0 <br />Gross AI ha Error ( Ci/L) M9310 4 0 600 260 420.0 139.5 <br />p a Inlmum a ec a e c Ivl y <br />(pCi/L) M9310 <br />a <br />0 <br />410 <br />300 <br />345.0 <br />54.5 <br />Gross Beta Result (pCi/L) M9310 4 0 520 7.7 274.9 272.8 <br />Gross Beta Error (pCi/L) M9310 4 0 290 280 285.0 5.8 <br />e a Inlmum a ec a e c rvi y <br />(pCi/L) M9310 <br />4 <br />0 <br />440 <br />370 <br />395.0 <br />31.1 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />