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M ® ® M M ® ® M M <br />HISTORICAL SUMMARY OF MONITORING RESULTS <br />VADOSE ZONE <br />NORTH COUNTY SANITARY LANDFILL <br />VZ -5 <br />Units: mg/I, unless noted <br />ample Designation VZ-5A/B V7-5A/B VZ-5A/B VZ-5A/B VZ-5A/B VZ-5A/B VZ-5A/B <br />Sampling Date 4/5/95 1/16/97 4/10/97 7/16/98 10/27/98 10/6/00 10/9/03 <br />Monitoring and Field Parameters <br />Quarterly Monitoring and Field Parameters <br />Total Dissolved Solids NA NA NA 632 NA NA 790 <br />Chloride <0.2 NA NA 22 21 NA 21 <br />Sulfate 0.3 NA NA 180 178 NA 95 <br />Cyanides NA NA NA NA NA NA NA <br />Total Organic Carbon NA NA NA NA NA NA NA <br />Constituents of Concern <br />Volatile Organic Compounds (ug/I) <br />1,1-Dichloroethene <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Carbon Disulfide <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />1,1-Dichloroethane <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Trichlorofluoromethane <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />1,1,1 -trichloroethane <br />NA <br />NA <br />_ <br />NA <br />NA <br />NA <br />NA <br />NA <br />Trichloroethene <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Tetrachloroethene <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Acetone <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Methylene Chloride <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Chloroform <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Trichloroethylene <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Benzene <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Toluene <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Carbon Disulfide NA NA NA NA NA NA NA <br />1,1-dichloroethen NA NA NA NA NA NA NA <br />e rac oroeffiiene <br />M ® ® M <br />