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UST Closure Report • • ABF Freight System,Inc. Manteca,California Page 3 • 3.1.2 Equipment Equipment used during the UST removal and excavation work included a 6,000-gallon Vacuum Truck, a Case 580L Backhoe, a 30-ton hydraulic truck crane, and various hand tools. 3.1.3 Permitting An Underground Storage Tank Closure Permit was obtained from the County of San Joaquin Public Health Services, Environmental Health Division. A copy of the UST closure application is located in Appendix 7. 3.2 Deviations from Project Work Plan There were no deviations from the project work plan. 3.3 UST Removal and Sampling UST removal activities were conducted at the site during the period of March 16 through 18, 1998. All UST removal activities were conducted under the direction of Mr. Steve Essert of CAL INC. Earthwork activities, including excavation, UST rigging and removal, and backfilling were conducted by CAL INC. A description of the regulations applicable to the work and a 40 detailed description of the UST removal activities are presented in the following sections. 3.3.1 Applicable Regulations The UST closure was conducted in accordance with the requirements of 40 CFR Part 280, Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST). Potentially hazardous materials including the UST, contaminated soil, and tank contents were profiled pursuant to the requirements of 40 CFR Part 261, Identification and Listing of Hazardous Waste. In the State of California, UST removal projects are regulated under California Code of Regulations (CCR) Title 22. State and local regulation implementation was directed by the local enforcement agency, the County of San Joaquin Public Health Services, Environmental Health Division. The County of San Joaquin was notified prior to UST removal and sampling. A representative of this agency was present at the time of removal and sampling. 3.3.2 Excavation The UST was found to contain approximately 500 gallons of diesel fuel. On March 16, 1998, American Valley Environmental Services, Inc. of Turlock, California removed the contents of the UST by using a vacuum truck. The contents were transported to the Americlean, Inc. facility • at Silver Springs, Nevada, where it was recycled. Americlean, Inc. did not require sample analyses prior to disposal. Thus, UST content samples were not collected. \\SERVERI\C-DRIVE\PROJECTS\3272\Plans and Reports\UST Closure Report.doc May 21,1998