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r a■� r� r, <br />r �r <br />�r <br />+�■ir rr �r �r r� r� rs ■r r� r �r r <br />HISTORICAL SUMMARY OF MONITORING RESULTS <br />VADOSE ZONE <br />NORTH COUNTY SANITARY LANDFILL <br />VZ -3 <br />Units: mg/l, unless noted <br />Sample Designation <br />VZ-3A/B VZ-3A/B VZ-3A/B VZ-3A/B VZ-3A/B VZ-3A/B VZ-3A/B VZ-3A/B VZ-3A/B <br />Sampling Date <br />1/16/97 4/10/97 <br />1/28/98 <br />5/4/98 7/16/98 10/27/98 4/26/99 3/2/00 4/28/00 <br />Monitoring and Field Parameters <br />Quarterly Monitoring and Field Par <br />— - tal Dissolved Solids ameters A NA <br />NA <br />2,120 1,760 NA NA NA NA <br />Chloride <br />A A <br />NA <br />670 642 446 A NA NA <br />A <br />WA <br />�iR 2 A 4 NA A A <br />� ani es NA NA NA NA NA NA NA NA NA <br />Total Organic Carbon NA NA A NA NA NA <br />Constituents of Concern <br />Volatile Organic Compounds tug/Il <br />1,1-Dichloroethene N NA A N A <br />Carbon Disulfide NA NA NA A NA NA NA N <br />1-Dichloroet ane NA NA NA N NA A A NA NA <br />1=thv1han7pne NA NA IVH IVH 11AM rvM 11M lin <br />l.nlul u1 V1111 •^ ,••• .. .- ---- <br />Carbon Disulfide NA NA NA A A N NA NA NA <br />1,1- ioethen NA NA NA NA NA NA NA NA 114M <br />Tetrac loroethene --N-A--NA NA NA NA NA N/A NA NA <br />Only organic compounds detecte in one or more samples are listed <br />NA = Not Analyzed <br />