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q r. • MONITORING WELL INSTALLATION REPORT AT QUIK STOP NO. 121 1196 WEST LOUISE AVENUE MANTECA, CALIFORNIA FOR QUIK STOP MARKETS, INC. Compliance & Closure, Inc (CCI), is pleased to present this report of the Monitoring Well Installation performed at Quik Stop Market No 121, located at 1196 West Louise Avenue in the City of Manteca, San Joaquin County, California(Figure 1) The purpose of installing three monitoring wells at the subject site is to monitor groundwater contamination discovered on the north side of the site during the removal of three fuel tanks on March 26, 1998 and during the course of CCI's previous Soil and Groundwater Investigation conducted in October 1998 The three wells will be used to monitor groundwater quality and flow direction over time Background Quik Stop currently operates a convenience store and sells retail gasoline at the subject site Quik Stop has provided gasoline services at the subject site since 1984 At that time, two, 10,000-gallon and one 8,000-gallon, single-walled, fiberglass fuel tanks were installed and were in operation from 1984 to 1998 There were no spill incidents reported at the subject site during the time the tanks were in operation On March 26, 1998, the three fuel tanks were removed from the site No apparent holes were observed in any of the three fiberglass tanks, with the exception of a patched hole on Tank T-1, and all three fuel tanks appeared to be in reasonably good condition The tanks were transported to Erickson, Inc in Richmond, California for proper processing and final destruction Under the direction of the County, six samples were collected from areas under each end of the fuel tanks The soil samples were collected from native soil, which was composed of a fine-to-medium grained sand, approximately 14 to 15 feet below the surface Groundwater was encountered at the