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<br /> <br />DESCRIPTIVE STATISTICS GROUND WATER WELL 29-4D 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 3 3 5 1 3.67 2.31 <br />Carbon, dissolved organic M415.1 Combustion 3 0 46 30 40.3 9.0 <br />Cation-Anion Balance % Calculation 3 0 8.9 0 4.7 4.5 <br />Sum of Anions meq/L 3 0 1240 797 1039 224.33 <br />Sum of Cations meq/L 3 0 1290 882 1137 222.53 <br />Chloride M325-2 Colorimetric (RFA) 3 0 17800 11500 13700 3554 <br />Cond @ 25C (umhos/cm) M120.1 -Meter 3 0 68000 56400 60633 6403 <br />Fluoride M340.21SE 3 0 56 39 45.0 9.5 <br />Hardness as CaC03 SM23408 -Calculation 3 2 44 0.5 15 25 <br />Nitrate as N, dissolved Calculation: N03N02-N02 3 3 0.2 0.1 0.13 0.06 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 3 3 0.2 0.1 0.13 0.06 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 3 3 0.25 0.05 0.133 0.104 <br />pH (units) M150.1 Electrometric 3 0 8.1 7.6 ~ 7.8 0.3 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 3 0 3.6 2.4 3.033 0.603 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 3 0 3.2 2.44 2.913 0.413 <br />Total Dissolved Solids M160.1 -Gravimetric 3 0 68200 51400 60367 8457 <br />Sodium Absorption Ratio in H2O USGS 11738-78 3 2 1330 0.015 443.34 767.87 <br />Sulfate M375.3 -Gravimetric 3 2 50 5 28 23 <br />Sulfide as S SM427C -Mod Methyl Blue 3 1 0.4 0.01 0.20 0.20 <br />TDS (talc) Calculation 3 0 68200 45800 59300 11887 <br />TDS ratio Rauo -measured/caicuiatetl 3 0 1.12 0.9 1.03 0.12 <br />Temperature Degrees C (Field) 3 0 17.1 14.2 15.8 1.5 <br />Gross Alpha Result (pCi/L) M9310 3 1 140 -70 56.7 111.5 <br />Gross Alpha Error (pCi/L) M9310 3 0 460 340 393.3 61.1 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />3 <br />0 <br />370 <br />220 <br />310.0 <br />79.4 <br />Gross Beta Result (pCi/L) M9310 3 1 520 -44 262.0 285.0 <br />Gross Beta Error (pCi/L) M9310 3 0 350 260 303.3 45.1 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />3 <br />0 <br />390 <br />370 <br />380.0 <br />10.0 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />