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OF PgUlly THOMAS R. FLINN P.O.BOX 1810-1810 E.HAZELTON AVENUE STOCKTON,CALIFORNIA 95201 DIRECTOR (209)468-3000 FAX(209)468-2999 iii6l I i*.� www.sjgov.org/pubworks THOMAS M.GAU CHIEF DEPUTY DIRECTOR MICHAEL SELLING Worldng fcw YOU CL; ff� M DEPUTY DIRECTOR Jan 2 9 2010 STEVEN WINKLER DEPUTY DIRECTORIb -NV ROGER JANES January 26, 2010 E �'UNWVT HEALTH BUSINESS ADMINISTRATOR PERMIT/SERMES Mr. Todd Del Frate California Regional Water Quality Control Board Central Valley Region 11020 Sun Center Drive, #2GO Rancho Cordova, California 95670 SUBJECT: SECOND SEMESTER AND ANNUAL 2009 GROUNDWATER MONITORING REPORT; NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL Dear Mr. Del Frate: Please find enclosed the Second Semester and Annual 2009 Groundwater and Surface Water Monitoring Report for the North County Recycling Center and Sanitary Landfill. Groundwater contamination by the landfill is not indicated. Conditions of the groundwater are unremarkable, and consistent with previous quarters. Full groundwater monitoring continues on a semi-annual basis (first and third quarters) in accordance with our Waste Discharge Requirements. Supplemental VC analysis of groundwater also continues on a semi-annual basis (second and third quarters) in accordance with the revised Report of Waste Discharge. We are pleased to report that no VOCs are present in the groundwater collected from any well. With the exception of false positives and similar sporadically reported compounds from lab or other contamination, VC impact has not been indicated at well G-4 (the "impacted"well) since January 2003, seven years ago. VOC impact has not been indicated at any other well at any time. VOCs, usually in low concentrations, were found in most soil gas wells. The continuing presence of VOCs in the soil gas within our property and the continuing lack of VOCs to groundwater at any well seem to indicate that the presence of VOCs in the soil at these concentrations does not threaten the groundwater. The liquid level in the secondary sump of Module 4 is measured by"bubbler tube" on quarterly. The level was first measured in the last quarter of 2009, and was found to be 0.5 inches. This small amount of water, accumulated since installation in 2004, is consistent with condensation, and does not indicate a liner leak. We were able to measure the groundwater elevation at upgradient well G-1, but not enough water was present to purge or sample. We have scheduled to redrill this well for the spring.