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PgUlry P.O.BOX 1810-1810 E.HAZELTON AVENUE THOMAS R. FLINN STOCKTON,CALIFORNIA 95201 • DIRECTOR (209)468-3000 FAX(209)468-2999 r,9CtFORaFwww.sjgov.org/pubworks THOMAS M.GAU CHIEF DEPUTY DIRECTOR MICHAEL SELLING worldmg for YOU r----" (CE9VE0 DEPUTY DIRECTOR I Q) '^(E(l WINKLER DEPUTY DIRECTOR NOV 0 6 2009 ROGER JANES BUSINESS ADMINISTRATOR November 8, 2009 ENVIRONMENT HEALTH PERMITISERVICES Mr. Todd Del Frate, PIG California Regional Water Quality Control Board 11020 Sun Center Drive, #200 Rancho Cordova, California 95670 SUBJECT: STATUS UPDATE, HARNEY LANE SANITARY LANDFILL Dear Mr. Del Frate:fA) Please consider this letter a Status Update of the well installation and well search, as requested in your letter dated August 19, 2009. San Joaquin County sampled the domestic supply wells in properties adjacent to the landfill parcel to assess potential impact to the use of water at the neighboring properties (Figure 1). The analysis included general water quality parameters and Volatile Organic Compounds (VOCs). The results of these analyses indicates that the domestic wells around the landfill appear to be free of VOCs or other indications of landfill impact (Table 1). Complete analytical results have been transmitted previously. At your request, the County requested a search by the California Department of Water Resources of those domestic wells surrounding the landfill. This search yielded information relating to the supply well within the labor housing facility (attached), but for none of the other four wells of interest. The data available from the migrant labor housing facility does not allow correlation between the data collected at that well and data collected at the groundwater migration monitoring wells. Such a correlation would be important if the County was proposing using the domestic wells as groundwater monitoring wells, but this use of the domestic wells is not contemplated at this time. No further analysis of the domestic wells is planned having established that these wells are not impacted with VOCs. We are proceeding with the installation of four additional landfill gas extraction wells at the landfill (Figure 2). To that end, we have submitted an application for that work to the San Joaquin County Department of Environmental Health and have engaged SCS Field Services for this work. It is our intent that these wells are installed and operational by December 1, 2009.