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HISTORICAL SUMMARY OF ANALYTICA <br />GROUNDWATER <br />NORTH COUNTY SANITARY LANDFILL <br />G -2/G -2A <br />r Tnits! mo/1 nnless noted <br />Sample Designation <br />G-2 <br />G-2 <br />G-2 <br />G-2 <br />G-2 <br />G-2 <br />G-2 <br />G <br />- <br />NR <br />1.2 <br />4 <br />- <br />NR <br />1.3 <br />4.0 <br />- <br />Sampling Date <br />10/5/93 <br />1/4/94 <br />4/8/94 <br />7/1/94 <br />12/1/94 <br />1/3/95 <br />4/3/95 <br />7/7/95 <br />10/2/95 <br />1/2/96 <br />4/5/96 <br />7/10/96 <br />1/28/14 <br />Monitoring and Field 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 />9.7 <br />General Water Quality Parameters <br />NR <br />6.88 <br />7.49 <br />7.92 <br />7.22 <br />7.82 <br />7.08 <br />8.18 <br />7.13 <br />7.38 <br />6.97 <br />7.01 <br />7.85 <br />pH (std. units)(f-eld) <br />6.73 <br />199 <br />252 <br />240 <br />236 <br />210 <br />202 <br />237 <br />241 <br />223 <br />210 <br />224 <br />243.2 <br />Electrical Conductivity (umhos/cm)(field) <br />204 <br />Temperature (°C)(field)NR <br />NR <br />NR <br />NR <br />19.0 <br />18.2 <br />21.0 <br />22.5 <br />21.3 <br />18.8 <br />21.5 <br />20.7 <br />19.5 <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 />192 <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 />1.21 <br />Turbidity (NTU) field <br />NR <br />NR <br />NR <br />NR <br />1.7 <br />1.0 <br />0.20 <br />NT <br />5 <br />7.2 <br />3 <br />2.9 <br />48.8 <br />Chloride <br />6 <br />13 <br />5 <br />7 <br />7.4 <br />8.1 <br />6 <br />6 <br />8 <br />7 <br />7 <br />7 <br />7.3 <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 />87 <br />Total rlicenhied Sn1id, <br />200 <br />200 <br />200 <br />200 <br />189 <br />180 <br />200 <br />220 <br />280 <br />210 <br />230 <br />220 <br />200 <br />Chemical Oxygen Demand <br />Nitrate Nitrogen <br />Sulfate <br />NR <br />1.3 <br /><5 <br />NR <br />1.1 <br /><8 <br />NR <br />1.8 <br /><8 <br />NR <br />1.3 <br /><8 <br />NR <br />1.5 <br />3.5 <br />NR <br />1.3 <br />3.5 <br />NR <br />1.4 <br />trace <br />NR <br />1.5 <br />3 <br />NR <br />1.3 <br />5 <br />NR <br />1.2 <br />4 <br />NR <br />1.3 <br />trace <br />NR <br />1.3 <br />4.0 <br /><5.6 <br />1.5 <br />3.7 <br />_Metals <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 />18 <br />Calcium <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 />9.7 <br />Magnesium <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 />4.1 <br />Potassium <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 />18 <br />Sodium <br />Volatile Organic Compounds (ug/Il <br />NR <br />NR <br />NR <br /><0.36 <br /><0.36 <br /><0.36 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.083 <br />Benzene <br /><1 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.13 <br />Bromobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><02 <br /><0.2 <br /><0.24 <br />Bromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.4 <br /><0.4 <br /><0.4 <br /><0.14 <br />Bromodichloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.27 <br />Bromoform <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.25 <br />Bromomethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.11 <br />n-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.15 <br />sec-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.13 <br />tert-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.18 <br />Carbon tetrachloride <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.093 <br />Chlorobenzene <br />NT <br /><10 <br />NT <br />NR <br />NR <br />NR <br /><0.50 <br /><0.50 <br /><0.50 <br /><0.3 <br /><0.3 <br /><0.3 <br />NR <br /><0.3 <br /><0.14 <br />Chloroethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.12 <br />Chloroform <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.14 <br />Chloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.20 <br />2-chlorotoluene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.15 <br />4-chlorotoluene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.13 <br />dibromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.44 <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 /><0.16 <br />1,2-dibromoethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />