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<br />al <br />DES(CRIPT~VESTATISTICS GROUND WATER WELL 20-5 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 12 5 0.05 1.14 1.82 <br />Carbon, dissolved organic M415.1 Combustion 12 1 11 4 7.3 2.1 <br />Cation-Anion Balance % Calculation 12 10 4.1 -7.4 -2.8 3.3 <br />Sum of Anions meq/L 12 0 76.7 47 67.48 8.47 <br />Sum of Cations meq/L 12 0 73.5 44.6 63.73 7.89 <br />Chloride M325-2 Colorimetric (RFA) 12 0 165 83 122 24 <br />Cond @ 25C (umhos/cm) M12o.1 -Meter 12 0 6090 4150 5600 554 <br />Fluoride M340.21SE 12 0 11 5.3 8.2 1.5 <br />Hardness as CaC03 SM2340B -Calculation 12 0 400 177 224 69 <br />Nitrate as N, dissolved Calculation: N03N02-N02 12 10 0.3 0.01 0.12 0.09 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 12 10 0.3 0.01 0.12 0.09 <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 Elecirometric 12 0 8.4 7.6 7.9 0.3 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 12 2 0.2 0.025 0.076 0.047 <br />Phosphorus, ortho dissolved M365.1 Aulo Ascorbic Acid 12 4 2.11 0.01 0.334 0.590 <br />Total Dissolved Solids M160.1 -Gravimetric 12 0 4050 2510 3584 433 <br />Sodium Absorption Ratio in H2O USGS 11738-78 12 0 50.2 18.3 41.10 9.52 <br />Sulfate M375.3 -Gravimetric 12 0 190 10 52 55 <br />Sulfide as S SM427C -Mod Methyl Blue 12 0 20 0.4 6.00 6.20 <br />TDS (talc) Calculation t2 0 3880 2470 3506 416 <br />TDS ratio Ratio - measuredlcalculaled 12 0 1.09 0.95 1.02 0.05 <br />Temperature Degrees C (Field) 12 0 17.9 9.3 13.3 2.4 <br />Gross Alpha Result (pCi/L) M9310 12 1 47 -8.5 7.3 14.1 <br />Gross Alpha Error (pCi/L) M9310 12 0 51 14 24.0 10.6 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />47 <br />13 <br />21.0 <br />8.6 <br />Gross Beta Result (pCi/L) M9310 12 1 32 -16 11.3 14.4 <br />Gross Beta Error (pCi/L) M9310 12 0 35 11 20.5 6.5 <br />Beta Minimum Detectable <br />Activity (pCiIL) M9320 <br />12 <br />0 <br />41 <br />16 <br />27.4 <br />6.8 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />