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<br /> <br />DESCRIPTIVE STATISTICS GROUND WATER WELL 29.4U CONTINUED <br />JULY 1, 1989 -MARCH 31, 2000 <br /> <br />Parameter (m !I) EPA Method TOTAL <br />SAMPLES BELOW <br />DETECTION MA):IMUM <br />VAWE MINIMUM <br />VALUE <br />MEAN VALUE STANDARD <br />DEVIATION <br />Bromide M3001C 9 8 1 0.05 0.28 0.33 <br />Carbon, dissolved or anic M415.1 Combustion 9 0 22 7.5 10.8 4.5 <br />Cation~Anion Balance o Ca culatiorl 9 3 6.7 ~ 1.6 1.8 2.7 <br />Sum otAnions me /L 9 0 62.8 21.7 29.13 13.08 <br />Sum of Cations meq/L 9 0 66.2 21.8 30.22 13.81 <br />Chloride M325 2 Colorimetric (RFA) 9 0 510 130 203 122 <br />Cond @ 25C (umhos/cm) M 120.1 ~ Meter 9 0 5780 1760 2581 1235 <br />Fluoride M340.21SE 9 0 11 6 7.7 1.6 <br />Hardness as CaC03 SM2340B Calculaton 9 0 47 27 39 8 <br />Nitrate as N, dissolved Calculation: N03N02 N02 9 6 1 0.04 0.22 0.30 <br />Nitrate/Nitrite as fJ, dissolved M353.2 Auto Cad Red 9 6 1 0.05 0.22 0.30 <br />Nitrite as Fl, dissolved M353.2 Auto Cad Red 9 8 0.1 0.005 0.046 0.035 <br />pH (units) M150.1 Electrometric 9 0 9.5 8.7 9.1 0.2 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 9 1 0.3 0.005 0.146 0.091 <br />Phosphorus, ortho dissolves M365.1 Auto Ascorbic Acid 9 2 1.62 0.0025 0.300 0.516 <br />Total Dissolved Solids M 160.1 •Gravimetric 9 0 3430 1190 1650 691 <br />Sodium Absorption Ratio in H2O USGS 11738-78 9 0 97.9 36.3 46.93 19.21 <br />Sulfate M375.3 Gravimetric 9 0 200 150 166 14 <br />Sulfide as S SM427C ~ Idod Meth 161ue 8 6 0.6 0 0.16 0.17 <br />TDS (talc) Calculation 9 0 3820 1300 1760 790 <br />TDS ratio Ratio ~ measuretlrcataWated 9 0 0.98 0.89 0.94 0.03 <br />Tem erature De tees C (Field) 9 0 15.3 8.7 11.8 2.3 <br />Gross Alpha Result (pCiiLl M9310 9 0 35 2.75 14.1 9.3 <br />Gross Alpha Error (pCi/L) M9310 9 0 23 2.9 9.5 5.7 <br />p a Inimum a ec a e c rvl y <br />(pCi/L) M9310 <br />9 <br />0 <br />46 <br />1.2 <br />10.2 <br />13.8 <br />Gross Beta Result (pCi/L) M9310 9 0 19 3 8.8 4.4 <br />Grass Beta Error (pCi/L) M9310 9 0 25 4.4 10.9 5.9 <br />e a Inimum a ec a e c Ivl y <br />(pCi/L) M9310 <br />9 <br />0 <br />14 <br />3 <br />10.4 <br />3.4 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />