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<br />OESGaIPTiVE STATISTICS GROUND WATER WELL 21-48 CONTINUED, <br />JULY 1, 1999 -JUNE 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 12 12 5 0.05 1.88 1.68 <br />Carbon, dissolved organic M415.1 Combustion 12 0 41 2 23.8 10.0 <br />Cation-Anion Balance % Calculation 12 5 3.9 -4.7 -0.1 3.1 <br />Sum of Anions meglL 11 0 653 0 482.83 232.08 <br />Sum of Cations meq/L 1 t 0 639 0 484.04 236.56 <br />Chloride M325-2 Colorimetric (RFA) 12 0 1210 530 990 214 <br />Cond @ 25C (umhos/cm) M12D.1 -Meter t2 0 38900 10400 32908 8963 <br />Fluoride M3a0.21SE 12 0 380 9 61.0 100.8 <br />Hardness as CaC03 SM2340B -Calculation 7 0 87 0 25 28 <br />Nitrate as N, dissolved Calculation: N03N02-N02 12 10 0.9 0.1 0.24 0.23 <br />Nitrate/Nitrite as N, dissolved M353.2 Auto Cad Red 12 10 0.9 0.1 0.24 0.23 <br />Nitrite as N, dissolved M353.2 Auto Cad Red 12 11 0.14 0.05 0.078 0.032 <br />pH (units) M150.1 Electrometric 12 0 12.2 8.1 9.0 1.0 <br />Phosphorus, dissolved M365.1 Auto Ascorbic Acid 12 0 5 0.3 3.550 1.600 <br />Phosphorus, ortho dissolved M365.1 Auto Ascorbic Acid 72 1 5.06 0.05 3.453 1.642 <br />Total Dissolved Solids M160.1 -Gravimetric 12 0 35300 3160 29926 10204 <br />Sodium Absorption Ratio in H2O USGS 11738-78 12 5 1770 0.015 571.42 601.97 <br />Sulfate M375.3 -Gravimetric 12 1 600 50 202 138 <br />Sulfide as S SM427C -Mod Methyl Blue 12 5 1.6 0.1 0.32 0.43 <br />TDS (talc) Calculation t2 0 36300 4340 30103 10013 <br />TDS ratio Raao -measured/calculated 11 0 1.06 0 0.90 0.30 <br />Temperature Degrees C (Field) 12 0 17.7 10.1 12.9 2.5 <br />Gross Alpha Result (pCi/L) M93f0 12 1 1600 -170 142.1 464.8 <br />Gross Alpha Error (pCi/L) M9310 12 0 570 25 196.2 139.8 <br />Alpha inimum Detectable <br />Activity (pCi/L) M9310 <br />12 <br />0 <br />280 <br />20 <br />155.1 <br />67.8 <br />Gmss Beta Result (pCi/L) M9310 12 0 1100 4.9 208.3 296.4 <br />Gross Beta Error (pCi/L) M93t0 12 0 360 19 171.2 92.0 <br />Beta Minimum Detectable <br />Activity (pCi/L) M93t0 <br />12 <br />0 <br />440 <br />29 <br />228.8 <br />121.0 <br /> <br /> <br />Analyte concentrations reported below the detection limit are set equal to one half the detection limit for all statistical calculations. <br />