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• <br />DESCRIPTIVE STATISTICS GROUND WATER WELL 29-2B CONTINUED <br />JULY 1, 1999 -JUNE 30, 2000 <br /> <br />Parameter (mg/I) EPA Method TOTAL <br />SAMPLES BELOW <br />DETECTION MAXIMUM <br />VALUE MINIMUM <br />VALUE <br />MEAN VALUE STANDARD <br />DEVIATION <br />Bromide M3001C 12 7 5 0.05 1.22 1.85 <br />Carbon, dissolved organic M415.1 Combustion 12 0 20 6 10.1 3.7 <br />Cation-Anion Balance % Calculation 12 10 6.8 -19 -8.5 8.1 <br />Sum of Anions meq/L 12 0 71.7 35.9 45.49 11.57 <br />Sum of Cations meq/L 12 0 66.2 30.1 38.88 12.26 <br />Chloride M325-2 Colorimetric (RFA) 12 0 450 96 197 120 <br />Cond @ 25C (umhos/cm) M120.1 -Meter 12 0 5690 2610 3897 784 <br />Fluoride M340.21SE 12 0 16 11.5 13.5 1.6 <br />Hardness as CaC03 SM2340B -Calculation 12 0 17 10 13 2 <br />Nitrate as N, dissolved Calculation: N03N02-N02 12 10 0.7 0.01 0.16 0.18 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 12 10 0.7 0.01 0.16 0.18 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 12 12 0.1 0.005 0.045 0.032 <br />pH (units) M150.1 Electrometric 12 0 8.6 8.2 8.4 0.1 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 12 1 0.4 0.005 0.105 0.102 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 12 5 8.9 0.0025 0.807 2.549 <br />Total Dissolved Solids M160.1 -Gravimetric 12 0 3640 1580 2207 630 <br />Sodium Absorption Ratio in H2O USGS 11738-78 12 0 158 83.9 106.43 26.09 <br />Sulfate M375.3 -Gravimetric 12 9 40 5 10 10 <br />Sulfide as S SM427C -Mod Methyl Blue 12 1 0.3 0.02 0.22 0.11 <br />TDS (talc) Calculation 12 0 3760 1880 2316 614 <br />TDS ratio RaLO -measured/calculated 12 0 1.18 0.81 0.95 0.11 <br />Temperature Degrees C (Field) 12 0 16.7 8.5 11.7 2.7 <br />Gross Alpha Result (pCi/L) M9310 12 1 56 -4.8 16.4 20.4 <br />Gross Alpha Error (pCi/L) M9310 12 0 30 9 17.9 6.7 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />28 <br />6.7 <br />12.7 <br />6.2 <br />Gross Beta Result (pCi/L) M9310 12 1 46 -11 6.1 13.7 <br />Gross Beta Error (pCi/L) M9310 12 0 22 8.2 12.4 4.0 <br />Bela Minimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />26 <br />11 <br />16.1 <br />4.9 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />