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<br /> <br />DESCRIPTIVE STATISTICS GROUND WATER WELL 21-3D 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 5 0.5 2.11 2.18 <br />Carbon, dissolved or anic M415.1 Combustion 9 0 54 17 27.0 11.3 <br />CatiomAnion Balance o Calculation 9 3 3.3 -3.2 1.1 2.3 <br />Sum of Anions m /L 8 0 731 0 595.89 226.43 <br />Sum of Cations meq/L 8 0 703 0 606.00 227.47 <br />Chloride M325 2 Colorimetric (RFA) 9 0 1360 1160 1306 60 <br />Cond ~ 25C (umhos/cml M 120.1 ~ Meter 9 0 41900 31500 40300 3311 <br />Fluoride M340.215E 9 0 71 44 59.2 7.7 <br />Hardness as CaC03 SM2340B ~ Calculation 9 0 152 40 64 35 <br />Nitrate as N, dissolved Calculation: N03N02 N02 9 8 0.4 0.05 0.15 0.11 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 9 8 0.4 0.05 0.15 0.11 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 9 8 1.92 0.005 0.281 0.619 <br />pH (units) M 150.1 Electrametric 9 0 8.5 7.9 8.2 0.2 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 9 0 5.3 0.5 3.144 1.908 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 9 0 5.2 0.9 3.380 1.381 <br />Total Dissolved Solids M160.1 -Gravimetric 9 0 38800 37300 38100 406 <br />Sodium Absorption Ratio in H2O USGS 1173878 9 0 1060 575 905.78 150.17 <br />Sulfate M375.3 -Gravimetric 9 7 50 5 41 16 <br />Sulfide as S SM427C ~ Mod Meth I Blue 9 3 0.5 0.08 0.22 0.15 <br />TDS (talc) Calculation 9 0 37800 34600 36033 1206 <br />TDS ratio Ratio measured/calculated 8 0 1.11 0 0.95 0.36 <br />Temperature De rees C (Field) 9 0 15.3 8.7 11.8 2.3 <br />Gross Alpha Result (pCi/L) M9310 9 0 540 0 132.0 191.0 <br />Gross Alpha Error (pCi/L) M9310 9 0 480 130 267.8 99.8 <br />p a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />360 <br />130 <br />216.7 <br />79.2 <br />Gross Beta Result (pCi/L) M9310 9 0 610 0 183.3 193.7 <br />Gross Beta Error (pCi/L) M9310 9 0 330 150 215.6 60.6 <br />e a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />440 <br />180 <br />288.9 <br />91.4 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />