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' Additional Site Assessment and Soil Vapor Extraction Pilot Test Report ERNIE'S GENERAL STORE ' 4407 East Waterloo Road, Stockton, California ' 1.0. INTRODUCTION At the request of Mr.Ernest P.Giannecchini,AdvancedGeoEnvironmental,Inc.(AGE)has prepared ' this report of environmental activities conducted at the site located at 4407 East Waterloo Road, Stockton, California. The report documents the following environmental activities conducted in November and December 2006: • On 22 November 2006,two paired CPT soil borings were advanced to further delineate the lateral and vertical extents of hydrocarbon-impacted soil and ground water at the site. ' 0 On 14 December 2006, one additional shallow ground water monitoring well was installed on the property located at 4318 East Pepsi Place, Stockton, California, approximately ' 250 feet west of the site,to verify and monitor the eastern boundary of the dissolved methyl tertiary-butyl ether(MTBE)plume.The well was developed and sampled during the ground water monitoring event conducted on 04 January 2007; details of the development and ' sampling will be included in Quarterly Report-First Quarter 2007. • On 12, 13, and 15 December 2006, three shallow-screened SVE wells and three ' deeper-screened SVE wells were installed on-site for use in SVE pilot tests. • On 26 and 27 December 2006,two 8-hour SVE pilot tests were conducted to provide vapor extraction data for the proper design of a soil remediation system. The pilot test conducted ' on 27 December 2006 utilizing the deeper-screened vapor wells was terminated after approximately 1 hour due to very poor flow rates. The site and the surrounding area are illustrated on Figure 1;a plan of the site, including soil boring and well locations, is illustrated on Figure 2. Site background information is summarized in ' Appendix A. This report is prepared in accordance with guidelines established by the Central Valley Regional ' Water Quality Control Board(CVRWQCB)for the investigation ofunderground storage tank(UST) sites.Field work was performed as detailed in the AGE-preparedAdditional Site Assessment and Soil Vapor Extraction Pilot Test Work Plan, dated 20 June 2006 and the AGE-prepared Additional Site ' Assessment and Soil Vapor Extraction Pilot Test Work Plan Addendum,dated 07 August 2006. San Joaquin County Environmental Health Department(EHD)correspondence and work plan approval ' letters are included in Appendix B. ' 2.0. CPT LITHOLOGIC INVESTIGATION On 22 November 2006, two paired soil borings (CPT-1 and CPT-2) were advanced at the site for 1 Advanced GmEnvironmental,Inc.