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Q <br /> Qti P.O.SOX 1610.1810 E.HAZELTON AVENUE <br /> THOMAS M <br /> ® . .GAU h <br /> DIRECTOR 'STOCKTON,CALIFORNIA85201 <br /> Ks. I (209)468-3000 FAX(209)468-2999 <br /> �. <PwvAv.sjgov.orglpubworks <br /> FRITZBUCHMAN <br /> DEPUTY DIRECTOR <br /> MICHAEL SELLING <br /> DEPUTY DIRECTOR <br /> ROGER JANES <br /> BUSINESS ADMINISTRATOR <br /> January 16, 2012 <br /> Mr. Todd Del Frate <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive,#200 <br /> Rancho Cordova, California 95670 <br /> SUBJECT: SECOND SEMESTER AND ANNUAL SUMMARY 2012 GROUNDWATER <br /> REPORT; NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL <br /> Dear Mr. Del Frate: <br /> Please find enclosed the Second Semester and Annual 2092 Groundwater and Surface Water <br /> Monitoring Report for the North County Recycling Center and Sanitary Landfill. This report <br /> ® presents data from July through December 2012. Groundwater monitoring continues on a semi- <br /> annual basis in accordance with our WDRs. The last monitoring report was submitted in <br /> July 2012, presenting data from January through June 2012. <br /> Conditions of the groundwater are unremarkable, and consistent with previous quarters. <br /> Groundwater contamination by the landfill is not indicated. Concentration limits were not <br /> exceeded at any well and no violations occurred during this monitoring period. <br /> With the exception of false positives and similar sporadically reported compounds from lab or <br /> other contamination, VOC impact has not been indicated at well G-4 (the "impacted"well) since <br /> January 2003, ten years ago. All other groundwater wells continue to be free of VOCs since <br /> monitoring began. <br /> Full groundwater monitoring continues on a semi-annual basis (first and third quarters) in <br /> accordance with our Waste Discharge Requirements. Supplemental VOC analysis of <br /> groundwater continues on a semi-annual basis (second and third quarters) in accordance with <br /> the revised Report of Waste Discharge. <br /> VOCs, usually in low concentrations,were found in most soil gas wells. The continuing <br /> presence of VOCs in the soil gas within our property and the continuing lack of VOCs in <br /> groundwater at any well seem to indicate that the presence of VOCs in the soil at these <br /> concentrations is a benign condition that does not threaten the groundwater at this site. <br /> Automated leachate collection continues at the sumps of Areas 1 and 3 (previously designated <br /> "Modules"). <br />