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<br />DESCRIPTIVE STATISTICS GROUND WATER WELL 29-40 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 9 1 -0.1 0.24 0.30 <br />Carbon, dissolved organic M415.1 Combustion 12 0 22 7 10.1 4.1 <br />Cation-Anion Balance %, Calculation 12 3 6.7 -1.6 2.1 2.6 <br />Sum of Anions meq/L 12 0 62.8 19.9 26.97 11.83 <br />Sum of Cations meq/L 12 0 66.2 21.5 28.08 12.39 <br />Chloride M325-2 Colorimetric (RFA) 12 0 510 110 181 111 <br />Cond ~ 25C (umhoslcm) M120.1 -Meter 12 0 5780 1760 2418 1094 <br />Fluoride M340.21SE 12 0 11 6 7.7 1.4 <br />Hardness as CaC03 SM2340B -Calculation 12 0 47 27 37 8 <br />Nitrate as N, dissolved Calculation: N03N02-N02 12 9 1 0.01 0.18 0.26 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 12 9 1 0.01 0.18 0.26 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 12 11 0.1 0.005 0.043 0.032 <br />pH (units) M150.1 Electrometric 12 0 9.5 8.7 9.1 0.2 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 12 1 0.3 0.005 0.145 0.080 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 12 2 1.62 0.0025 0.250 0.450 <br />Total Dissolved Solids M160.1 -Gravimetric 12 0 3430 1190 1539 622 <br />Sodium Absorption Ratio in H2O USGS 11738-78 12 0 97.9 35.3 44.83 16.86 <br />Sulfate M375.3 -Gravimetric 12 0 200 150 165 12 <br />Sulfide as S SM427C -Mod Methyl Blue 11 6 0.8 0 0.21 0.24 <br />TDS (talc) Calculation 12 0 3820 1240 1641 708 <br />TDS ratio Ratio-measuredlcakulaled 12 0 0.98 0.88 0.94 0.04 <br />Temperature Degrees C (Field) 11 0 17.5 10.9 13.0 2.1 <br />Gross Alpha Result (pCi/L) M9310 12 0 45 0 9.8 13.2 <br />Gross Alpha Error (pCi/L) M9310 12 0 35 3.9 13.1 8.0 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />23 <br />2.9 <br />8.4 <br />5.2 <br />Gross Beta Result (pCi/L) M9310 12 0 46 0.4 8.3 12.4 <br />Gross Beta Error (pCi/L) M9310 12 0 19 3 8.3 3.9 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />25 <br />4.4 <br />10.6 <br />5.0 <br /> <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />