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<br /> <br />DESCRIPTIVE STATISTICS GROUND WATER WELL 20.413 CONTINUED <br />JULY 1, 1999 - MARC#1 31, 2000 <br /> <br />Parameter m /I) EPA Method TOTAL <br />SAMPLES BELOW <br />DETECTION MAXIMUM <br />VALUE MINIMUM <br />VALUE <br />MEAN VALUE STANDARD <br />DEVIATION <br />Bromitle M3001C 8 8 0.5 0.05 0.23 0.23 <br />Carbon, dissolved organic M415.1 Combustion 8 0 20 4.5 11.1 5.5 <br />Cation•AnionBalance% Calculation 8 3 2.35 12.8 ~1.0 4.9 <br />Sum of Anions meq/L 8 0 67.6 26.3 33.66 13.87 <br />Sum of Cations meq/L 8 0 68.2 24.9 33.16 14.29 <br />Chloride M325-2 Colorimetric (RFA) 8 0 140 18 54 54 <br />Cond @ 25C (umhas/cm) M 120.1 ~ Meter 8 0 5360 2170 2685 1086 <br />Fluoride M340.21SE 8 0 24 13.5 17.0 3.4 <br />Hardness as CaC03 SM23406 ~ Calculation 8 0 64 28 42 11 <br />Nitrate as N, dissolved Calculation: N03N02~N02 8 7 0.2 0.05 0.14 0.06 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 8 7 0.23 0.05 0.15 0.07 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 8 7 0.1 0.005 0.053 0.033 <br />pH (units) M150.1 Electrometric 8 0 8.6 7.7 8.1 0.3 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 8 0 0.26 0.02 0.111 0.074 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 8 3 0.27 0.05 0.174 0.078 <br />Total Dissolved Solids M160.1 ~ Gravimetric 8 0 3730 1400 1786 789 <br />Sodium Absorption Ratio in H2O USGS 1173878 8 0 110 29 51.13 24.83 <br />Sulfate M375.3 Gravimetric 8 2 40 5 21 13 <br />Sulfide as S SM427C ~ Mod Meth I Blue 8 1 4 0.1 1.29 1.20 <br />TDS (talc) Calculation 8 0 3600 1460 1794 733 <br />TDS ratio Ratio measured/calculated 8 0 1.04 0.95 0.99 0.03 <br />Temperature De rees C (Field) 8 0 13.7 8.7 11.3 2.0 <br />Gross Alpha Result (pCi/L) M9310 8 0 110 0 30.2 38.4 <br />Gross Alpha Error ( Ci/L) M9310 8 0 45 5.1 19.4 13.8 <br />p a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />8 <br />0 <br />20 <br />7.5 <br />11.3 <br />5.5 <br />Gross Beta Result (pCi/L) M9310 8 0 100 0 20.0 34.7 <br />Gross Beta Error (pCi/L) M9310 8 0 26 7.6 13.2 8.0 <br />e a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />8 <br />0 <br />30 <br />11 <br />16.4 <br />8.5 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />