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' SEMI -ANNUAL TESTING <br />GROUND WATER QUALITY PARAMETERS <br />SITE: GW-N40 <br />13-Mar-03 19-Aug-03 <br />Not Tested <br />FIELD PARAMETERS <br />pH 6.62 6.82 <br />Water Temperature (deg C) 9.9 18.1 <br />Conductivity (umhos/cm) 3210 3250 <br />LABORATORY PARAMETERS <br /> Metals Analysis <br /> Aluminum, dissolved (mg/L) 0.07 0.06 <br /> Calcium, dissolved (mg/L) 650 620 <br /> Iron, dissolved (mglL} 0.02 0.02 <br /> - Lead, dissolved (mg/L) 0.08 0.08 <br /> Magnesium, dissolved (mg/L) 116 132 <br /> Manganese, dissolved (mg/L) 1.80 1.72 <br /> Molybdenum, dissolved (mg/L) 0.02 0.01 <br /> Potassium (mg/L) 3.6 4.0 <br />• Selenium, dissolved (mg/L) <br />Sodium <br />dissolved (m <br />1L) 0.001 <br />132 0.001 <br />96 <br />0 <br /> , <br />g . <br /> Wet Chemistry <br /> Alkalinity as CaCO3 <br /> Bicarbonate as CaCO3 (mg/L) 342 361 <br /> Carbonate as CaCO3 (mg/L) 2 2 <br /> Hydroxide as CaCO3 (mg/L) 2 2.0 <br /> Total Alkalinity 342 361 <br /> Cation-Anion Balance <br /> Cation-Anion Balance (%) 1.7 -5.7 <br /> Sum of Anions (meq/L) 46.5 51.9 <br /> Sum of Cations (meq/L) 48.1 46.3 <br /> Chloride, dissolved (mg/L) 14 14 <br /> Conductivity @ 25C (umhos/cm) 3170 3280 <br /> Hardness as CaCO3 2100 2090 <br /> Nitrate/Nitrite as N, dissolve 0.02 0.02 <br /> Nitrite as N, dissolved 0.01 0.01 <br /> Nitrogen, ammonia 0.2 0.1 <br /> pH (lab) 7.5 7.1 <br /> Phosphorus, ortho dissolved 0.03 0.04 <br /> Residue, Filterable (TDS) @180 3150 3310 <br /> Sodium Absorption Ratio in W at 1.27 0.92 <br /> Sulfate 1870 2110 <br /> TDS (calculated) 2990 3190 <br /> TDS (ratio -measured/calculat 1.05 1.04 <br />• 1. Negative (-) =less than <br /> 2. U =not tletected at MDL (Minimum Detection Level) <br />