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<br /> <br />DESCRIPT4YE STATISTICS GROUND WATER WELL 20-1 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 7 6 5 0.2 2.49 2.37 <br />Carbon, dissolved organic M415.1 Combustion 7 0 54 3 38.3 17.9 <br />Cation-Anion Balance % Calculation 7 5 20 -5.5 2.2 9.3 <br />Sum of Anions meq/L 7 0 1080 512 873.00 225.37 <br />Sum of Cations meq/L 7 0 1320 470 919.57 264.82 <br />Chloride M325-2 Colorimetric (RFA) 7 0 14200 5480 9626 3230 <br />Cond @ 25C (umhos/cm) M120.1 -Meter 7 0 68900 3320 47889 22278 <br />Fluoride M340.21SE 7 0 47.4 20 34.3 10.8 <br />Hardness as CaC03 SM2340B -Calculation 5 2 66 0 16 24 <br />Nitrate as N, dissolved Calculation: N03N02-N02 7 7 0.2 -0.2 0.07 0.14 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 7 7 0.2 -0.2 0.07 0.14 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 7 7 0.1 -0.1 0.034 0.070 <br />pH (units) M150.1 Electrometric 7 0 8.5 7.7 8.0 0.3 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 7 0 8.2 4.3 6.514 1.214 <br />Phosphorus, ortho dissolved M365.1 Aulo Ascorbic Acid 7 0 11.6 0.72 5.736 3.859 <br />Total Dissolved Solids M160.1 -Gravimetric 7 0 63600 26500 52071 12806 <br />Sodium Absorption Ratio in H2O USGS 11738-78 7 4 3170 -0.03 750.00 1175.77 <br />Sulfate M375.3 -Gravimetric 7 1 200 5 81 60 <br />Sulfide as S SM427C -Mod Methyl Blue 7 0 21.4 0.51 9.42 8.90 <br />7DS (talc) Calculation 7 0 59100 27300 48957 12040 <br />TDS ratio Ratio -measured/calculated 7 0 1.1$ 0.97 1.06 0.07 <br />Temperature Degrees G (Field) 7 0 17.6 9.8 14.1 2.6 <br />Gross Alpha Result (pCi/L) M9310 7 0 770 0 130.9 284.1 <br />Gross Alpha Error (pCi/L) M9310 7 0 600 120 315.7 166.3 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />7 <br />0 <br />410 <br />140 <br />267.1 <br />106.1 <br />Gross Beta Result (pCi/L) M9310 7 0 520 7.7 200.8 214.0 <br />Gross Beta Error (pCi/L) M9310 7 0 290 140 244.3 62.4 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />7 <br />0 <br />440 <br />210 <br />344.3 <br />91.1 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />