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' City of Tracy SECOR interviewed the City of Tracy Water District to identify the location of any city-owned ' or operated wells that may be within 2,000 feet of the site According to the water district, one municipal well is located at the intersection of Grant Line Road and Tracy Boulevard, approximately 1 3 miles (6,865 feet) east (crossgradient) of the site A field search verified the municipal well location Field Verification ' On August 26, 2003, SECOR visited the site to verify the location of six domestic water supply wells identified in the DWR well logs Five of the six well locations were confirmed at the addresses listed in Table 4 At each location, a pump tank was observed on the ' property The sixth well location could not be confirmed because the residence was inaccessible due to a gated driveway SECOR personnel drove public streets within the 2,000-foot search radius and did not identify any other wells visible from public right-of-ways ' Sensitive Receptors ' During the field search, SECOR looked for surface bodies of water that could act as sensitive receptors such as ponds, lakes, streams, rivers, and canals No surface bodies of water were identified as a sensitive receptor within 2,000 feet of the site SECOR also did not identify any public schools within the 2,000-foot search radius 2.4 Summary of Remedial Action ' Source removal conducted at the site to date has consisted of dewatering the tank pit during the 2003 UST excavation activities During the dewatering activities, approximately 199,090 gallons of impacted water and a calculated estimate of 243 8 pounds of MtBE were removed ' from the tank pit excavation Concentrations of MtBE, TBA, and TAME in water samples collected following dewatering activities were significantly lower than pre-UST removal and tank pit dewatering activities (Table 3) ' 3.0 CURRENT ASSESSMENT ACTIVITIES 31 Permitting/Site-Specific Health and Safety Plan/Utility Clearance IBefore the assessment activities were begun, SECOR applied for and obtained well installation permits for wells S-1, EX-1, MW-7, MW-8, MW-9, CPT-1 and CPT-2 from the I SJCEHD (Appendix B) In addition to the well installation permits, SECOR also obtained an access agreement for the installation of MW-8, MW-9, and CPT-2 on the Shell property located north of the site (Appendix B) ISECOR prepared a site-specific Health and Safety Plan for well installation and sampling activities and remediation testing at the site, as required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910 120) The document was reviewed and signed by SECOR personnel and subcontractors performing work at the site 32262 Assessment&Feasibility Report&SCM doc 3 September 30 2004 I77EL 32262 04 0502