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<br />DESCRIPTIVE STATfSTICS GROUND WATER Wf=LL 29.4D CONTINUED <br />JULY 1, 1999 -APRIL 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 2 2 5 1 3.00 2.83 <br />Carbon, dissolved organic M415.1 Combustion 2 0 45 30 37.5 10.6 <br />Cation-Anion Balance % Calculation 2 0 8.9 0 4.5 6.3 <br />Sum of Anions meq/L 2 0 1240 1080 1160 113.14 <br />Sum of Cations meq/L 2 0 1290 1240 1265 35.36 <br />Chloride M325-2 Colorimetric (RFA) 2 0 17800 11800 14800 4243 <br />Cond @ 25C (umhos/cm) M120.1 -Meter 2 0 68000 56400 62200 8202 <br />Fluoride M340.21SE 2 0 56 40 48.0 11.3 <br />Hardness as CaC03 SM2340B -Calculation 2 2 0.5 0.5 1 0 <br />Nitrate as N, dissolved Calculation: N03N02-N02 2 2 0.2 0.1 0.15 0.07 <br />NitratelNitrile as N, dissolved M353.2 Auto Cad Red 2 2 0.2 0.1 0.15 0.07 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 2 2 0.25 0.1 0.175 0.106 <br />pH (units) M150.1 Electrometric 2 0 8.1 7.7 7.9 0.3 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 2 0 3.6 3.1 3.350 0.354 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 2 0 32 3.1 3.150 0.071 <br />Total Dissolved Solids M160.1 -Gravimetric 2 0 68200 61500 64850 4738 <br />Sodium Absorption Ratio in H2O USGS 11738-78 2 2 0.015 0.015 0.02 0.00 <br />Sulfate M375.3 -Gravimetric 2 2 50 5 28 32 <br />Sulfide as S SM427C -Mod Methyl Blue 2 1 0.2 0.01 0.11 0.13 <br />TDS (talc) Calculation 2 0 68200 63900 66050 3041 <br />TDS ratio Ratio-measured/calculated 2 0 1.07 0.9 0.99 0.12 <br />Temperature Degrees C (Field) 2 0 15.3 12.5 13.9 2.0 <br />Gross Alpha Result (pCi/L) M93'10 2 0 140 100 120.0 28.3 <br />Gross Alpha Error (pCi/L) M9310 2 0 460 380 420.0 56.6 <br />Alpha Minimum Detectable <br />Activity (pCi/L) M9310 <br />2 <br />0 <br />370 <br />340 <br />355.0 <br />21.2 <br />Gross Beta Result (pCi/L) M93t0 2 0 520 310 415.0 148.5 <br />Gross Beta Error (pCi/L) M9310 2 0 300 260 280.0 28.3 <br />Beta Minimum Detectable <br />Activity (pCi/L) M9310 <br />2 <br />0 <br />380 <br />370 <br />375.0 <br />7.1 <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />