Laserfiche WebLink
DATE January 20, 2005 <br /> 7-ELEVEN, INC. QUARTERLY REPORT <br /> Store Number 7-Eleven Store#20632 <br /> Site Address 4627 Da Vinci Drive, Stockton, CA <br /> 7-Eleven Contact Mr Ken Hilliard <br /> Consulting Company SECOR International, Inc — Mr Jaff Auchterlonie <br /> SECOR Project No 77EL 20632 04 <br /> Primary Agency San Joaquin County Environmental Health Department <br /> (SJCEH D) <br /> WORK PERFORMED THIS QUARTER [Fourth —2004] <br /> 1 Conducted groundwater monitoring and sampling of seven wells on October 8, 2004 <br /> 2 Prepared quarterly groundwater sampling and status report <br /> WORK PROPOSED FOR NEXT QUARTER [First—20051 <br /> 1 Perform quarterly groundwater sampling and prepare status report <br /> 2 Obtain access agreement and perform offsite assessment <br /> DISCUSSION <br /> An active 7-Eleven convenience store and gasoline station is operated at the site (Figures 1 <br /> and 2) Monitoring and sampling have been conducted at the site since the fourth quarter of <br /> 1997 The current groundwater monitoring and sampling data are summarized in Table 1, <br /> and presented in Figures 2 and 3 Historical groundwater monitoring and sampling results <br /> are summarized in Table 2 The well completion details are summarized in Table 3 <br /> Current Siete Information <br /> Current Phase of Project Groundwater Monitoring <br /> Frequency of Monitoring and Sampling Quarterly, Seven wells- MW-1, MW-2, <br /> MW-3, MW-4R, MW-5, MW-6, MW-7 <br /> Are Liquid Phase Hydrocarbons Present On-site No <br /> Water Supply Wells within a 2,000-foot radius and <br /> their Respective Direction None <br /> Current Remediation Techniques None <br /> Permits for Discharge None <br /> Historic Range in Depth to Water, Q4-97 to Q4-04 MW-1, 4 13 to 7 13 feet bgs <br /> Current Quarter Monitorina Data (See Figure 2 and Table 1) <br /> Wells Monitored and Sampled Seven wells, MW-1, MW-2, MW-3, <br /> MW-4R, MW-5, MW-6, MW-7 <br /> Dissolved Oxygen Concentrations Measured In Seven wells, MW-1, MW-2, MW-3, <br /> MW-4R, MW-5, MW-6, MW-7 <br /> Approximate Depth to Groundwater (DTW) 6 46 to 7 82 ft bgs _ <br /> Average Change in Groundwater Elevation Since <br /> Last Event 0 15 foot decrease <br /> 20632 04-4Q Report doc <br />