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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> NORTH COUNTY SANITARY LANDFILL <br /> Units:mg/l,unless noted <br /> Sample Designation G-5 G-5 <br /> Sampling Date 1/26/06 5/15/06 <br /> Monitoring and Field Parameters <br /> General Water Oualitv Parameters <br /> Temperature(°C) 16 19 <br /> Chloride 8 NR <br /> Nitrate Nitrogen 2.3 NR <br /> Total Dissolved Solids 190 NR <br /> Sulfate 4 NR <br /> pH(std.units) 6.83 7.08 <br /> Electrical Conductivity(umhos/cm) 224 298 <br /> Turbidity(NPU)field 12.6 11.8 <br /> Metals <br /> Calcium 15.9 NR <br /> Potassium 2.98 NR <br /> Magnesium 15 NR <br /> Sodium 8.37 NR <br /> Volatile Organic Co=ounds(ug/1) <br /> Acetone <1.8 <1.8 <br /> Acetonitrile NT NT <br /> Acrolein NT NT <br /> Acrylonitrile <0.46 <0.46 <br /> Allyl chloride NT NT <br /> Benzene <0.17 <0.17 <br /> Bromobenzene <0.21 <0.21 <br /> Bromochlommethane <0.24 <0.24 <br /> Bromodichloromethane <0.20 <0.20 <br /> Bromoform <0.32 <0.32 <br /> Bromomethane <0.53 <0.53 <br /> 2-butanone <0.92 <0.92 <br /> n-butylbanzene <0.32 <0.32 <br /> sec-butylbenzene <0.19 <0.19 <br /> tert-butylbenzene <0.20 <0.20 <br /> Carbon Disulfide <0.45 <0.45 <br /> Carbon tetrachloride <0.35 <0.35 <br /> Chlorobenzene <0.16 <0.16 <br /> Chloroethane <0.41 <0.41 <br /> 2-chloroethyl vinyl ether NT NT <br /> Chloroform <0.20 <0.20 <br /> Chloromethane <0.25 <0.25 <br /> Chloroprene NT NT <br /> 2-chlorotoluene <0.19 <0.19 <br /> 4-chlorotoluene <0.22 <0.22 <br /> dibromochloromethane <0.22 <0.22 <br /> 1,2-dtbromo-3-chloropane <0.58 <0.58 <br /> 1,2-dibromoethane <0.21 <0.21 <br /> Dibromomethane <0.23 <0.23 <br /> trans-1,4-dichioro-2-butene <0.86 <0.86 <br /> 1,2-dichlombenzene <0.14 <0.14 <br /> 1,3-Dichlorobenzene <0.13 <0.13 <br /> 1,4-Dichlorobenzene <0.14 <0.14 <br /> Dichlorodifluoromethane <0.28 <0.28 <br /> NR=Not Required <br /> NT=Not Tested <br /> '=Trace Concentration <br /> [1]Tliis data point appears anomalous and therefore was not used for statistical purposes. <br /> (1} Parameter also detected in one or more quality control blanks. <br /> M n: to 'ectslelM79128 gw anM07-28-M M M M M M M M M M M M <br />