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<br />DESCRIPTI1fE STATISTICS GROUND WATER WELL 20-10 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 10 5 0.05 0.80 1.49 <br />Carbon, dissolved organic M415.1 Combustion 12 0 25 3 13.6 7.1 <br />Cation-Anion Balance % Calculation 12 3 16.3 -20.9 2.4 9.9 <br />Sum of Anions meq/L 11 0 31.5 0 22.28 8.87 <br />Sum of Cations meq/L t 1 0 32.2 0 23.23 8.88 <br />Chloride M32S2 Colorimetric (RFA) 11 0 180 0 79 51 <br />Cond @ 25C (umhos/cm) M120.1 -Meter t2 0 2650 1380 2027 496 <br />Fluoride M340.21SE 11 0 10 0 7.8 2.7 <br />Hardness as CaC03 SM2340B -Calculation 12 0 198 82 145 42 <br />Nitrate as N, dissolved Calculation: N03N02-N02 12 9 0.2 0.03 0.11 0.06 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 12 9 0.2 0.03 0.11 0.06 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 12 11 0.1 0.005 0.051 0.034 <br />pH (units) M150.1 Electrometric 12 0 8.7 8.2 8.5 0.2 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 12 1 0.29 0.01 0.106 0.083 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 12 4 0.349 0.0025 0.138 0.109 <br />Total Dissolved Solids M160.1 -Gravimetric 12 0 1780 950 1330 283 <br />Sodium Absorption Ratio in H2O USGS 11738-78 12 0 33.7 10.2 19.13 7.95 <br />Sulfate M375.3 -Gravimetric 12 0 190 10 124 59 <br />Sulfde as S SM427C -Mod Methyl Blue 12 1 28.9 0.01 10.37 8.49 <br />TDS (talc) Calculation t2 0 1770 959 1357 292 <br />TDS ratio Rauo - measuredlcaiculated 11 0 1.12 0 0.90 0.30 <br />Temperature Degrees C (Field) 12 0 16.7 10.3 13.2 2.3 <br />Gross Alpha Result (pCi/L) M9310 12 0 29 0 10.9 9.4 <br />Gross Alpha Error (pCi/L) M9310 12 0 18 5.5 11.1 3.2 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />13 <br />4.5 <br />7.9 <br />2.7 <br />Gross Beta Result (pCilL) M9310 12 0 13 0 5.6 4.1 <br />Gross Beta Error (pCi/L) M9310 12 0 14 4.2 8.1 2.9 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />t2 <br />0 <br />21 <br />6.2 <br />11.2 <br />4.5 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />