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<br />DESCRIPTIVE STATISTICS GROUND WAtER WEL! 21.3U CONTINUED <br />JULY 1, 1999 -MARCH 31, 2W0 <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 1.61 1.93 <br />Carbon, dissolved or anic M415.1 Combustion 9 0 30 8 12.2 6.8 <br />CatiomAnion Balance o Calculation 9 4 9.7 0.1 2.8 2.9 <br />Sum of Anions meq/L 9 0 633 213 296.00 127.94 <br />Sum of Cations meq/L 9 0 578 252 296.11 105.90 <br />Chloride M325~2 Colorimetric (RFA) 9 0 1160 560 662 191 <br />Cond @ 25C (umhos/cm) M120.1 ~ Meter 9 0 37500 17900 20589 6351 <br />Fluoride M340.21SE 9 0 38.1 18 23.5 5.9 <br />Hardness as CaC03 SM2340B ~ Calculation 9 0 120 25 81 26 <br />Nitrate as N, dissolved Calculation: N03N02~N02 9 5 0.4 0.07 0.17 0.10 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 9 5 0.4 0.07 0.17 0.10 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 9 9 0.1 0.005 0.043 0.029 <br />pH (units) M150.1 Electrometric 9 0 9 7.7 8.0 0.4 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 9 0 5.1 0.08 1.096 1.516 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 9 1 4.92 0.25 1.117 1.441 <br />Total Dissolved Solids M160.1 ~ Gravimetric 9 0 34100 14200 16589 6568 <br />Sodium Absorption Ratio in H2O USGS 1173878 9 0 1160 231 376.22 294.62 <br />Sulfate M375.3 -Gravimetric 9 3 300 10 69 91 <br />Sulfide as S SM427C ~ Mod Meth I Blue 9 2 1.2 0.1 0.48 0.33 <br />TDS (talc) Calculation 9 0 35200 12400 16033 7213 <br />TDS ratio Ratio measured/calculated 9 0 1.16 0.97 1.05 0.06 <br />Temperature De rees C (Field) 9 0 15.3 8.7 11.8 2.3 <br />Gross Alpha Result (pCi/L) M9310 9 0 290 0 63.9 98.0 <br />Gross Alpha Error (pCi/L) M9310 9 0 150 44 99.2 37.4 <br />p a Inimum a ec a e c ivi y <br />(pCi/L) M9310 <br />9 <br />0 <br />150 <br />7.6 <br />66.2 <br />39.2 <br />Gross Beta Result (pCi/L) M9310 9 1 310 0 89.9 95.0 <br />Gross Beta Error (pCi/L) M9310 9 0 160 41 80.8 36.2 <br />e a inlmum a ec a e c rvi y <br />(pCi/L) M9310 <br />9 <br />0 <br />230 <br />47 <br />103.1 <br />52.4 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />