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<br />DESCRIPTIVE STATISTICS GROUND WATER WEII 20.8 CONTINUED <br />JULY 1, 1999 -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 8 0.625 0.05 0.19 0.22 <br />Carbon, dissolved or anic M415.1 Combustion 9 1 6 2.5 4.4 1.1 <br />Cation Anion Balance Calculation 9 6 11 ~7.6 ~1.0 5.4 <br />Sum of Anions meq/L 9 0 73.3 50.7 60.30 6.92 <br />Sum of Cations meq/L 9 0 63.2 51.1 58.60 4.40 <br />Chloride M325-2 Colorimetric (RFA) 9 0 121 90 103 11 <br />Cond @ 25C (umhos/cm) M 120.1 -Meter 9 0 6390 3615 4744 817 <br />Fluoride M340.21SE 9 0 7 4.7 5.9 0.7 <br />Hardness as CaC03 SM2340B ~ Calculation 9 0 312 235.5 291 22 <br />Nitrate as N, dissolved Calculation: N03N02~N02 9 7 0.4 0.01 0.15 0.13 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 9 7 0.4 0.01 0.15 0.13 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 9 9 0.1 0.005 0.054 0.039 <br />pH (units) M150.1 Electrametric 9 0 8 7.6 7.8 0.1 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 9 2 0.2 0.025 0.085 0.049 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 9 5 0.25 0.025 0.143 0.087 <br />Total Dissolved Solids M160.1 ~ Gravimetric 9 0 3480 2740 3147 258 <br />Sodium Absorption Ratio in H2O USGS 1173878 9 0 33 25.8 30.31 2.32 <br />Sulfate M375.3 ~ Gravimetric 9 0 310 120 154 59 <br />Sulfide as S SM427C Mod Meth I Blue 9 0 13 1.9 8.64 3.17 <br />TDS (colt) Calculation 9 0 3670 2800 3177 293 <br />TDS ratio Ratio measured/calculated 9 0 1.1 0.89 1.00 0.06 <br />Temperature De reel C (Field) 9 0 15.3 8.7 11.8 2.3 <br />Gross Alpha Result (pCi/L) M9310 9 0 45 0 16.9 17.3 <br />Gross Alpha Error (pCi/L) M9310 9 0 32 13 22.1 5.6 <br />p a inlmum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />20 <br />14 <br />17.9 <br />2.2 <br />Gross Beta Result (pCi/L) M9310 9 0 41 0 21.0 14.4 <br />Gross Beta Error (pCi/L) M9310 9 0 26 14 19.1 4.0 <br />e a Inlmum a ec a e c Ivl y <br />(pCi/L) M9310 <br />9 <br />0 <br />31 <br />18 <br />25.5 <br />5.5 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />