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<br />DESCRIPTIVE STATISTICS GROUND WATER WELL 20-46 CONTINUED <br />AUGUST 1, 1999 -JUNE 30, 2000 <br /> <br />Parameter (mg/l) EPA Method TOTAL <br />SAMPLES BELOW <br />DETECTION MAXIMUM <br />VALUE MINIMUM <br />VALUE <br />MEAN VALUE STANDARD <br />DEVIATION <br />Bromide M3001C 11 9 0.5 0.05 0.20 0.20 <br />Carbon, dissolved organic M415.1 Combustion 11 0 29 4.5 14.8 8.4 <br />Cation-Anion Balance % Calculation 1 t 3 4.3 -12.8 0.2 4.6 <br />Sum of Anions meq/L t 1 0 67.6 24.3 31.26 12.31 <br />Sum of Cations meq/L t 1 0 68.2 24.9 31.34 12.36 <br />Chloride M325-2 Colorimetric (RFA) 11 0 140 15 44 48 <br />Cond @ 25C (umhos/cm) M120. t -Meter 1 t 0 5360 2140 2546 940 <br />Fluoride M340.2 ISE t 1 0 24 13.5 16.4 3.0 <br />Hardness as CaC03 SM2340B -Calculation 11 0 64 26 38 12 <br />Nitrate as N, dissolved Calculation: N03N02-N02 11 10 0.2 0.05 0.13 0.05 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 11 10 0.23 0.05 0.13 0.06 <br />Nitrite as N, dissolved M353.2 Auto Cad Red t 1 10 0.1 0.005 0.052 0.028 <br />pH {units) M150.1 Electrometric 11 0 9.2 7.7 8.2 0.4 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 11 0 0.26 0.02 0.119 0.069 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 11 3 0.27 0.05 0.161 0.073 <br />Total Dissolved Solids M160.t -Gravimetric 11 0 3730 1340 1679 685 <br />Sodium Absorption Ratio in H2O USGS 11738-78 11 0 110 29 51.00 20.78 <br />Sulfate M375.3 -Gravimetric 11 4 40 5 19 13 <br />Sulfide as S SM427C -Mod Methyl Blue 11 2 4 0.1 1.10 1.07 <br />TDS (talc) Calculation 1t 0 3600 1340 1679 644 <br />TDS ratio Ratio-measuredlcaicuiated 11 0 1.05 0.95 1.00 1).04 <br />Temperature Degrees C (Field) 11 0 19.7 9.4 12.8 3.1 <br />Gross Alpha Result (pCi/L) M9310 11 0 110 0 24.6 33.6 <br />Gross Alpha Error (pCi/L) M9310 11 0 45 5.1 16.7 12.5 <br />Alpha Minimum Detectable <br />Activity {pCi/L) M9310 <br />11 <br />0 <br />20 <br />7.3 <br />10.7 <br />4.9 <br />Gross Beta Result (pCi/L) M9310 11 0 100 0 16.0 29.8 <br />Gross Beta Error (pCi/L) M9310 11 0 26 6.4 12.1 7.1 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />11 <br />0 <br />30 <br />10 <br />15.8 <br />7.6 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />Q <br />'~ F <br />`~ <br />V <br />0 <br /> <br />W <br />1 <br />n <br />G <br />~!`~ <br />} <br />'~ <br />l <br />~~ <br />Q <br />A <br />1 <br />n <br />r~ <br />N <br />0 <br />o ~ <br />$v `."~ <br />~1 t <br />O <br />Q <br />O <br />1 ~ <br />Q ~ <br />~~ <br /> <br />A <br />n <br />(o <br />5 <br />9 <br />~. <br />s <br />