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s • <br />DESCRIPTIVE STATISTICS GROUND WATER WELL 29.28 CONTINUED <br />JULY 1, 1999 -APRIL 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 10 7 5 0.05 1.42 1.98 <br />Carbon, dissolved organic M415.1 Combustion 10 0 20 6 9.9 4.0 <br />Cation-Anion Balance % Calculation 10 8 6.8 -19 -8.8 9.0 <br />Sum of Anions meq/L 10 0 71.7 36.1 47.26 11.94 <br />Sum of Cations meq/L 10 0 66.2 30.1 40.29 13.06 <br />Chloride M325-2 Colorimetric (RFA) 10 0 450 96 216 122 <br />Cond @ 25C (umhos/cm) Mt20.t -Meter 10 0 5690 3240 4059 726 <br />Fluoride M340.21SE 10 0 16 12 13.9 1.5 <br />Hardness as CaC03 SM2340B -Calculation 10 0 17 10 13 2 <br />Nitrate as N, dissolved Calculation: N03N02-N02 10 8 0.7 0.01 0.17 0.20 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 10 8 0.7 0.01 0.17 0.20 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 10 10 0.1 0.005 0.044 0.035 <br />pH (units) M150.1 Electrometric 10 0 8.5 8.2 8.4 0.1 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 10 1 0.4 0.005 0.117 0.109 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 10 5 8.9 0.0025 0.957 2.792 <br />Total Dissolved Solids M160.1 -Gravimetric 10 0 3640 1580 2314 639 <br />Sodium Absorption Ratio in H2O USGS 11738-78 10 0 158 87 110.52 26.81 <br />Sulfate M375.3 -Gravimetric 10 7 40 5 11 11 <br />Sulfide as S SM427C -Mod Methyl Blue 10 1 0.3 0.02 0.22 0.11 <br />TDS (calc) Calculation 10 0 3760 1950 2402 642 <br />TDS ratio Ratio -measured/caicuiated 10 0 1.18 0.81 0.96 0.11 <br />Temperature Degrees C (Field) 10 0 16.7 8.5 11.4 2.6 <br />Gross Alpha Result (pCi/L) M9310 10 0 56 0 16.4 20.2 <br />Gross Alpha Error (pCi/L) M9310 10 0 30 9 18.5 7.1 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />10 <br />0 <br />28 <br />6.7 <br />13.7 <br />6.4 <br />Gross Beta Result (pCi/L) M9310 10 0 46 0 8.0 13.9 <br />Gross Beta Error (pCi/L) M9310 10 0 22 8.2 13.1 4.1 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />10 <br />0 <br />26 <br />12 <br />17.0 <br />4.8 <br /> <br /> <br />Analyle concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />