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M i r ® ® ® ® r ® ® ® M ® w M ® ® ® M <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />NORTH COUNTY SANITARY LANDFILL <br />G -2/G -2A <br />Units: mg/l, unless noted <br />Sample Designation G-2 G-2 G-2 G-2 G-2 G-2 G-2 G-2 G-2 G-2 G-2 G-2 G-2 <br />Sampling Date 8/12/87 10/31/89 11/15/90 1/25/91 4/10/91 7/22/91 10/31/91 1/9/92 4/2/92 7/2/92 10/1/92 1/4/93 8/20/93 <br />Monitorinz and Field Parameters <br />General Water Ouality Parameters <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />pH (std. units)(field) <br />6.98 <br />7.60 <br />7.34 <br />7.41 <br />7.32 <br />7.01 <br />6.82 <br />7.37 <br />6.89 <br />6.50 <br />6.81 <br />6.54 <br />7.20 <br />Electrical Conductivity (umhos/cm)(field) <br />250 <br />290 <br />216 <br />207 <br />226 <br />267 <br />213 <br />251 <br />221 <br />258 <br />214 <br />206 <br />247 <br />Temperature (°C)(field) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Oxygen Reduction Potential (ORP) (field) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Dissolved Oxygen (D.0) (field) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Turbidity (NTU) field <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chloride <br />12 <br />17 <br />NR <br />7 <br />6.9 <br />7 <br />12 <br />18 <br />12 <br />7 <br />7 <br />7 <br />7 <br />Total Hardness (calculated) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Dissolved Solids <br />210 <br />240 <br />230 <br />170 <br />210 <br />190 <br />150 <br />250 <br />190 <br />210 <br />170 <br />200 <br />200 <br />Chemical Oxygen Demand <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nitrate Nitrogen <br />0.96 <br />1.4 <br />1.2 <br />1.6 <br />4.1[2] <br />1.4 <br />1.4 <br />1.6 <br />1.3 <br />1.4 <br />1.4 <br />1.4 <br />1.4 <br />Sulfate <br />19 [2] <br />NR <br /><8 <br /><8 <br /><8 <br /><8.0 <br /><8 <br /><8 <br /><8 <br /><5 <br /><5 <br /><5 <br /><5 <br />Metals <br />Calcium <br />Magnesium <br />Potassium <br />Sodium <br />Volatile Or¢anic Compounds (u¢/1) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Benzene <br /><2 <br />1 <br /><1 <br />NR <br />NR <br />NR <br /><1 <br />NR <br />NR <br />NR <br /><1 <br />NR <br />NR <br />Bromobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Bromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Bromodichloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Bromoform <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br />1.1 * <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Bromomethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />n-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />sec-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />tert-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Carbon tetrachloride <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Chlorobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Chloroethane <br /><7 <br />NR <br /><1 <br />NR <br />NR <br />NR <br /><1 <br />NR <br />NR <br />NR <br /><2 <br />NR <br />NR <br />Chloroform <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Chloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />2-chlorotoluene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />4-chlorotoluene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />dibromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1,2-dibromo-3-chloropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />12-dihmmoethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />