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<br />DESCRIPTIVE STATISTICS GROUND WATER WELL 2i-2 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 8 2 0.05 0.32 0.55 <br />Carbon, dissolved organic M415.1 Combustion 12 0 10 4 5.1 1.7 <br />Cation-Anion Balance % Calculation 12 2 5 -4.7 0.7 2.6 <br />Sum of Anions meq/L 11 0 33.9 0 27.28 8.82 <br />Sum of Cations meq/L 11 0 34.7 0 27.50 8.86 <br />Chloride M325-2 Colorimetric (RFA) 12 0 23 10 13 3 <br />Cond @ 25C (umhos/cm) M120.1 -Meter 12 0 3630 2090 2378 419 <br />Fluoride M340.21SE 12 0 0.5 0.3 0.4 0.0 <br />Hardness as CaC03 SM2340B -Calculation 12 0 1060 891 984 47 <br />Nitrate as N, dissolved Calculation: N03N02-N02 12 6 0.5 0.01 0.17 0.16 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 12 7 0.5 0.01 0.17 0.16 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 12 12 0.1 0.005 0.033 0.030 <br />pH (units) M150.1 Electrometric 12 0 8 6.4 7.1 0.4 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 12 4 0.55 0.005 0.103 0.152 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 12 6 0.38 0.0025 0.112 0.144 <br />Total Dissolved Solids M160.1 - Gravimetric 12 0 2550 1510 1679 283 <br />Sodium Absorption Ratio in H2O USGS 11738-78 12 0 8.85 2.81 3.64 1.68 <br />Sulfate M375.3 - Gravimetric 12 0 550 530 535 7 <br />Sulfide as S SM427C -Mod Methyl Blue 12 6 1.2 0.01 0.27 0.33 <br />TDS (talc) Calculation 12 0 2550 1560 1743 269 <br />TDS ratio Ratio-measuretl/caltuiatetl 12 0 1.01 0 0.88 0.28 <br />Temperature Degrees C (Field) 12 0 18.1 8.7 12.2 2.8 <br />Gross Alpha Result (pCi/L) M9310 12 1 20 -7.3 3.5 8.0 <br />Gross Alpha Error (pCilL) M9310 12 0 19 7 11.6 3.4 <br />Alpha Minimum Detectable <br />Acitvity (pCilL) M9310 <br />12 <br />0 <br />14 <br />6.6 <br />9.0 <br />2.0 <br />Gross Beta Result (pCi/L) M9310 12 0 28 0 7.9 9.6 <br />Gross Bela Error (pCilL) M9310 12 0 15 7.3 9.6 2.1 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />19 <br />9.2 <br />12.5 <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 />