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TABLE 6-Continued <br /> LEACHATE MONITORING SUMMARY <br /> FIRST SEMESTER 2012 <br /> NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL <br /> (Units mg/I unless noted) <br /> L-1 L-3 L-4 <br /> (Module 1 (Module 3 (Module 4 <br /> Sampling Designation sum sum sum <br /> Sampling Date 1/9/12 1/9/12 1/9/12 <br /> Volatile Organic Compounds (ug/L)-Continued <br /> n-Propylbenzene 0.12* ND 0.18* <br /> Tetrachloroethene ND ND 0.15* <br /> Toluene 1.5 7.1 0.78 <br /> Trichloroethene 0.31* ND ND <br /> 1,2,4-Trimethylbenzene 1.5 ND ND <br /> Vinyl chloride 3.0 0.88 7.6 <br /> Total Xylenes 9.6 2.6 3.9 <br /> Acetone 19 1200 ND <br /> 2-Hexanone ND 120 ND <br /> Methyl ethyl ketone ND 910 ND <br /> Methyl isobutyl ketone ND 11 ND <br /> ND= Not Detected <br /> NM = Not Measured <br /> *=Trace Concentration (estimated value) <br /> {1)= Parameter found in one or more quality control blank. <br /> 0 <br /> North County RC&SL Public Works/Solid Waste <br /> 15'Semester 2012 Groundwater Monitoring 17 County of San Joaquin—July 26,2012 <br />