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<br /> <br />DESCRIPTIVE STATISTICS GROUND WATER WELL 21-3$ CONTINUED <br />.JULY 1, 1999 - Mi4RCH 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 />Bromide M3001C 9 9 5 0.5 2.11 2.18 <br />Carbon, dissolved or anic M415.1 Combustion 9 0 30 15 19.2 5.1 <br />Cation~Anion Balance o Calculation 9 5 4 •2.6 0.3 2.4 <br />Sum of Anions me /L 8 0 642 0 507.44 208.85 <br />Sum of Cations meq/L 8 0 631 0 509.78 210.44 <br />Chloride M325~2 Colorimetric (RFA) 9 0 1200 630 1068 172 <br />Cond ~ 25C (umhos/cm) M120.1 ~ Meter 9 0 38000 22800 34511 5872 <br />Fluoride M340.21SE 9 0 82 33 45.7 14.6 <br />Hardness as CaC03 SM2340B ~ Calculation 9 0 95 36 65 15 <br />Nitrate as N, dissolved Calculation: N03N02~N02 9 8 0.4 0.05 0.16 0.11 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 9 8 0.4 0.05 0.16 0.11 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 9 8 1.12 0.005 0.181 0.354 <br />pH (units) M150.lElectrometric 9 0 8.8 8 8.3 0.3 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 9 0 2.5 0.09 1.799 0.766 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 9 1 2.58 0.25 1.819 0.744 <br />Total Dissolved Solids M160.1 ~ Gravimetric 9 0 34100 19100 32089 4879 <br />Sodium Absorption Ratio in H2O USGS 1173878 9 0 789 578 716.33 71.14 <br />Sulfate M375.3 -Gravimetric 9 4 190 50 82 46 <br />Sulfide as S SM427C ~ Mad Meth I Blue 9 6 0.3 0.01 0.12 0.08 <br />TDS (talc) Calculation 9 0 33400 19800 30822 4216 <br />TDS ratio Ratio measured/calculated 8 0 1.11 0 0.92 0.35 <br />Temperature De rees C (Field) 9 0 15.3 8.7 11.8 2.3 <br />Gross Alpha Result (pCi/L) M9310 9 0 670 0 260.2 253.8 <br />Gross Alpha Error ( Ci/L) M9310 9 0 490 100 252.2 113.1 <br />p a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />290 <br />82 <br />171.3 <br />59.5 <br />Gross Beta Result (pCi/L) M9310 9 0 350 0 150.0 138.1 <br />Gross Beta Error (pCi/L) M9310 9 0 330 71 181.2 79.7 <br />e a inimum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />440 <br />94 <br />237.1 <br />102.5 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />