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Well Destruction and Excavation Sampling Report Former TRACY DINER 95 West 11`h Street, Tracy, California 1.0. INTRODUCTION At the request of the current property owper, Mr. Joe Panetta,Advanced GeoEnvironmental, hie. (AGE)has prepared this Well Destruction and Excavation/Sampling Report regarding interim soil ` remediation performed at 95 West 11`^ Street, Tracy, California. The purpose of the interim remediation was to remove the remaining hydrocarbon-impacted soil from beneath the site prior to construction of a proposed multistory office building over the site. This report has been prepared in accordance with guidelines established by the Central Valley Regional Water Quality Control Board (CVRWQCB) for investigation of UST sites. The site location is provided in Figure 1; the prominent features on the subject property are depicted in Figure 2. 2.0. PROCEDURES Monitoring wells MW-1 through MW-4 were abandoned as part of over-excavation activities to remove hydrocarbon-impacted soil related to an unauthorized release of petroleum hydrocarbons from former USTs at the site. Over-excavation of the former gasoline UST excavation was conducted on 20 and 21 October 2003 and 10,11, and 12 November 2003; during overexcavation activities, an additional UST with unknown fuel was discovered on 21 October 2003 and subsequently removed. The work was performed in accordance with the AGE-prepared and EHD- approved Additional Site Assessment Work Plan-August 2003, dated 21 August 2003 and Interim Soil Remediation Work Plan, dated 03 November 2003. 2.1. MONITORING WELL ABANDONMENT A permit for well abandonment of monitoring wells MW-1,MW-3,and MW-4 was approved by the ` San Joaquin County Environmental Health Department(EHD)on 11 September 2003.Copies ofthe well abandonment permit are included in Appendix C. Well abandonment of monitoring wells MW 1,MW-3,and MW-4 was performed on 15 September 2003 by Cascade Drilling Corporation ofRancho Cordova under EHD oversight.Well abandonment activities were performed utilizing a B-75 mobile drill rig equipped with 8-inch hollow stem augers; the monitoring wells were over-drilled to a total depth of 15 feet bsg. The well casing at each well location was removed and stored on plastic sheeting for later disposal.Soil cuttings generated during the over-drilling were stockpiled on site and covered by plastic sheeting in an area lacking public access.Afterwards,each over-drilled boring was backfilled to surface grade with approximately 39 gallons of bentonite slurry, utilizing the hollow stem augers as a tremie pipe. Advanced GeoEnvironmental,Inc. v