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DATE November 29, 2005 S E C ® 1R <br /> 7-ELEVEN, INC QUARTERLY REPORT <br /> Store Number 7-Eleven Store#14117 <br /> Site Address 2725 Country Club Boulevard, Stockton, CA <br /> 7-Eleven Contact Mr Ken Hilliard <br /> Consulting Company SECOR International, Inc — Mr Jaff Auchterlone <br /> SECOR Project No 77EL 14117 05 <br /> Primary Agency San Joaquin County Environmental Health Department <br /> (SJCEHD) <br /> WORK PERFORMED THIS QUARTER [Third — 2005] <br /> 1 Conducted groundwater monitoring and sampling of eight wells on September 30, 2005 <br /> 2 Prepared quarterly groundwater sampling progress report <br /> 3 Submitted additional site assessment report to SJCEHD on September 30, 2005 <br /> WORK PROPOSED FOR NEXT QUARTER [Fourth —2005] <br /> 1 Perform quarterly groundwater sampling and prepare status report <br /> 2 With approval of access agreement, install offsite groundwater monitoring well MW-9 <br /> 3 Conduct oxidation capacity testing in 1-1 and submit report <br /> DISCUSSION <br /> The site is a 7-Eleven convenience store and gas station (Figures 1 and 2) Underground <br /> storage tanks (USTs) at the site were replaced in July 1998 Monitoring and sampling has <br /> . been conducted at the site since the third quarter of 1999 The current groundwater <br /> monitoring and sampling data are summarized in Table 1, and presented in Figures 2 and <br /> 3 Historical groundwater monitoring and sampling results are summarized in Table 2 The <br /> well completion details are summarized in Table 3 An active USA Gasoline (former Exxon) <br /> service station is located east of the site <br /> Current Site Information <br /> Current Phase of Project Groundwater Monitoring <br /> Frequency of Monitoring and Sampling Quarterly, Eight wells - MWA through <br /> MW-8 <br /> Are Liquid Phase Hydrocarbons Present On-site No <br /> Water Supply Wells within a 2,000-foot radius and 11 domestic wells in various <br /> their Respective Direction directions, nearest is 400 feet north- <br /> northwest <br /> Current Remediation Techniques None <br /> Permits for Discharge None <br /> Historic Range in Depth to Water, Q3-99 to Q3-05 MW-1, 6 69 to 10 15 feet bgs <br /> Current Quarter Monitoring Data See Figure 2 and Table 1 <br /> Wells Monitored and Sampled Eight wells, MW-1 through MW-8 <br /> . Dissolved Oxygen Concentrations Measured In Eight wells, MW-1 through MW-8 <br /> 14117 05-3Q Report doe <br />