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<br />DESCRIPTIVE STATISTICS GROUND WATER WELL 19-2 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 9 1 0.05 0.38 0.31 <br />Carbon, dissolved or anic M415.1 Combustion 9 0 30 6 17.6 8.2 <br />Cation Anion Balance o Calculation 9 6 17.8 ~ 11.7 0.7 9.5 <br />Sum of Anions me /L 9 0 41.9 14.1 34.14 9.26 <br />Sum of Cations meq/L 9 0 41.4 20.2 34.05 7.78 <br />Chloride M325~2 Colorimetric (RFA) 8 0 750 0 488 245 <br />Cond @ 25C (umhos/cm) M 120.1 ~ Meter 9 0 3930 1410 3140 794 <br />Fluoride M340.21SE 8 0 16 0 11.2 4.6 <br />Hardness as CaC03 SM2340B ~ Calculation 9 0 411 142 321 104 <br />Nitrate as N, dissolved Calculation: N03N02~N02 9 7 1.63 0.01 0.28 0.51 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 9 7 1.63 0.01 0.28 0.51 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 9 0 8.1 6.4 6.878 52 <br />pH (units) M150.1 Electrometric 9 1 0.32 0.025 0.2 0.1 <br />Phas horns, dissolved M365.1 Auto Ascorbic Acid 9 3 0.27 0.0025 0.146 0.111 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 9 0 2380 1000 1893.889 473.153 <br />Total Dissolved Solids M160.1 •Gravimetric 9 0 18.5 14.2 15 1 <br />Sodium Absorption Ratio in H2O USGS 11738-78 9 9 5 5 5.00 0.00 <br />Sulfate M375.3 -Gravimetric 9 1 2.4 0.01 1 1 <br />Sulfide as S SM427C ~ Mod Meth I Blue 9 0 2300 890 1865.00 468.77 <br />TDS (talc) Calculation 9 0 1.12 0.9 1 0 <br />TDS ratio Ratio measured/calculated 9 0 15.3 10.1 12.54 1.95 <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 28 5.1 17.1 7.7 <br />Gross AI ha Error ( Ci/L) M9310 9 0 18 5.7 11.9 3.9 <br />p a inlmum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />33 <br />0 <br />14.7 <br />11.2 <br />Gross Beta Result (pCi/L) M9310 9 0 19 5.2 12.1 4.3 <br />Gross Beta Error (pCi/L) M9310 9 0 21 7.5 15.4 4.9 <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 />