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<br />DESCRIPTIVE STATISTICS GROUND WATfR WELL 29-48 CONTINUED <br />AUGUST 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 11 10 0.5 0.05 0.27 0.20 <br />Carbon, dissolved organic M415.1 Combustion 11 1 12 5 6.5 2.1 <br />Cation-Anion Balance % Calculation 11 6 1.85 -6.8 -0.9 3.0 <br />Sum of Anions meq/L 11 0 77.7 27.6 65.80 13.28 <br />Sum of Cations meq/L 11 0 73.6 28.6 64.43 12.50 <br />Chloride M325-2 Colorimetric (RFA) 11 0 170 19 130 38 <br />Cond @ 25C (umhos/cm) M120.t -Meter 11 0 5910 2170 5140 1010 <br />Fluoride M340.215E 11 0 33 17 27.8 4.1 <br />Hardness as CaC03 SM23408 -Calculation 11 0 44 30 37 4 <br />Nitrate as N, dissolved Calculation: N03N02-N02 11 10 0.2 0.01 0.09 0.06 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 11 10 0.2 0.01 0.09 0.06 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 11 11 0.1 0.005 0.045 0.034 <br />pH (units) M150.1 Electrometric 11 0 8.4 7.4 7.8 0.3 <br />Phosphorus, dissolved M365.1 Aulo Ascorbic Acid 11 0 0.2 0.02 0.109 0.053 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 11 3 0.79 0.05 0.179 0.215 <br />Total Dissolved Solids M160.1 -Gravimetric 11 0 4000 1490 3513 682 <br />Sodium Absorption Ratio in H2O USGS 11738-76 11 0 122 51.4 104.04 18.21 <br />Sulfate M375.3 -Gravimetric 11 9 10 5 6 2 <br />Sulfide as S SM427C -Mod Methyl Blue 11 6 1 0.03 0.17 0.28 <br />TDS (talc) Calculation 11 0 3920 1510 3469 676 <br />TDS ratio Ratio ~ measured/caiculated 11 0 1.11 0.93 1.01 0.05 <br />Temperature Degrees C (Field) 10 0 16.6 8.7 11.9 2.9 <br />Gross Alpha Resull (pCi/L) M9310 11 1 48 -11.55 14.1 17.2 <br />Gross Alpha Error (pCilL) M9310 11 0 37 9.9 23.9 8.0 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />11 <br />0 <br />24 <br />8 <br />19.1 <br />4.0 <br />Gross Beta Result (pCi/L) M9310 11 1 50 -12.3 13.2 17.4 <br />Gross Beta Error (pCi/L) M9310 11 0 28 10 19.9 4.3 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />11 <br />0 <br />30 <br />11 <br />26.7 <br />5.6 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />