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��► Cardr�o� <br /> ATC <br /> Shaping the Future <br /> December 12, 2013 Cardno ATC <br /> COOi 1117 Lone Palm Ave <br /> Suite 201 B <br /> Victoria L. McCartney, REHS Modesto,CA 95351 <br /> Senior Registered Environmental Health Specialist <br /> San Joaquin County Environmental Health Department . phone +1 209 579 2221 <br /> Fax +1209 579 2225 <br /> 1868 East Hazelton Avenue www.cardno.com <br /> Stockton, CA 95206 <br /> www.cardnoatc.com <br /> Subject: Groundwater Monitoring Well Destruction Report <br /> Former Cheaper Store No. 37 <br /> 15 East Grant Line Road <br /> Tracy, California 95376-2720 <br /> Dear Ms. McCartney: <br /> In a letter dated January 16, 2013, the San Joaquin County Environmental Health Department <br /> (EHD) stated it had received concurrence from the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB)on a"No Further Action"request for the site. The EHD also directed the <br /> destruction of the site's monitoring wells in this letter. <br /> Cardno ATC (formerly ATC Associates)is pleased to submit this report on behalf of The <br /> Customer Company describing the methods and protocols used to destroy the eight groundwater <br /> monitoring wells. <br /> SITE LOCATION <br /> The site is located at 15 East Grant Line Road in Tracy, California, as shown on Figure 1. <br /> The principal land use in the vicinity of the site consists of mixed residential and commercial <br /> purposes. The site is currently occupied by the Bonfare Market, a convenience store with a retail <br /> fuel station. A site plan is provided as Figure 2. <br /> SITE HISTORY <br /> Two 10,000-gallon underground storage tanks(USTs)were excavated and removed from the <br /> site on March 3, 1988. One UST was used to store leaded gasoline and the other was used to <br /> store unleaded gasoline. Groundwater was encountered in the UST excavation at approximately <br /> seven feet below ground surface (bgs). Soil samples were not collected but two groundwater <br /> samples were collected from within the excavation pit. Laboratory results indicated the <br /> groundwater had been impacted by petroleum hydrocarbons. Approximately 100 cubic yards of <br /> soil were excavated when the USTs were removed. <br /> Three groundwater monitoring wells(MW-1, MW-2, and MW-3)were installed at the site on <br /> March 29 and 30, 1988. The initial groundwater samples collected from these wells did not <br /> Australia • Belgium • Canada • Columbia • Ecuador • Germany • Indonesia • Italy <br /> Kenya • New Zealand • Papua New Guinea • Peru • Tanzania • United Arab Emirates <br /> United Kingdom • United States • Operations in 85 countries <br /> I <br />