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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> LEACHATE <br /> NORTH COUNTY SANITARY LANDFILL <br /> Units:mg/l unless noted <br /> Sample Designation L-4 L-4 <br /> Sampling Date 3/3/05 10/11/05 <br /> Monitoring and Field Parameters <br /> General Wates QMft P ra eter <br /> Temperature(°C) NT NT <br /> Chloride 47 240 <br /> Nitrate Nitrogen <0.2 <0.045 <br /> Total Dissolved Solids 1,000 1,760 <br /> Sulfate 3 2* <br /> pH(std.units) 6.45 6.88 <br /> Electrical Conductivity(umhos/cm) 1,540 2,751 <br /> Turbidity(NTU)field NT NT <br /> Metals <br /> Calcium,Dissolved 134 267 <br /> Magnesium,Dissolved 59 137 <br /> Potassium,Dissolved 2 4.53 <br /> Sodium,Dissolved 67 139 <br /> Volatile Oreanic Compowids(ug/i) <br /> Acetone 250 39* <br /> Acetonitrile <50 Q,4 <br /> Acrolein <100 <0.70 <br /> Acrylonnile <50 <0.26 <br /> Allyl chloride NT <0.14 <br /> Benzene <1 6.9 <br /> Bromobenzene <1 <0.39 <br /> Bromochloromethane <1 <0.42 <br /> Bromodichloromethane <l <0.25 <br /> Bromoform <1 <0.18 <br /> Bromomethane <1 <0.61 <br /> 2-butanone 370 12* <br /> n-butylbenzene <1 <0.38 <br /> sec-butylbenzene <I <0.36 <br /> tert-butylbenzene <1 <0.35 <br /> Carbon Disulfide <I <0.29 <br /> Carbon tetrachloride <1 <0.37 <br /> Chlorobenzene <I 0.55* <br /> Chloroethane <1 5.9 <br /> 2-chloroethyl vinyl ether <10 <0.22 <br /> Chloroform <I <0.37 <br /> Chloromethane <1 <0.18 <br /> Chloroprene <10 <0.10 <br /> 2-chlorotoluene <1 <1.7 <br /> 4-chlorotoluene <1 <0.42 <br /> dibromochloromethane <1 <0.47 <br /> 1,2-dibromo-3-chloropane <5 <0.64 <br /> 1,2-dibromoethane <1 <0.43 <br /> Dibromomethane <1 <0.38 <br /> trans-1,4-dichloro-2-butene <5 <0.42 <br /> 1,2-dichlorobenzene <1 <1.4 <br /> 1,3-Dichlorobenzene <l <0.34 <br /> 1,4-Dichlorobenzene <1 3 <br /> Dichlorodifluoromethane <1 <0.31 <br /> NR=Not Required <br /> *=Trace Concentration <br /> NT=Not Tested <br /> M n: \data4Wjects 17912 gw a4W07-28= M ® M M M <br />