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3.0 UNDERGROUND STORAGE TANK CLOSURE PROGRAM The underground storage tank closure program involved a five step process including: (1) Tank Closure Permitting, (2)Tank System Removal and Disposal, (3) Soil Sampling, (4) Laboratory Analysis, and(5) Backfilling and Resurfacing the Excavation. Each element is described in the following sections. 3.1 TANK CLOSURE PERbIITTING On December 17, 1996,Wayne Perry,Inc.Obtained an Underground Storage Tank Permit#29959 from the City of Lodi. On December 17,1996,Wayne Perry,Inc.also obtained a tank removal permit from the Lodi Fire Department. Copies of the closure permits are included in Appendix A. 3.2 TANK SYSTEM REMOVAL AND DISPOS i On December 17, 1996, Wayne Perry, Inc., utilized a John Deere (Model 31OD) backhoe to remove the concrete and partial asphalt surface cover and dispenser island and exposed the top of the underground storage tanks. During the excavation, the soil removed from the excavations(and temporarily stockpiled near the excavation)was monitored using a photoionization detector. On December 18, 1996, Adams Services of Gardena, California, under subcontract to Wayne Perry, Inc., rinsed and purged the underground tanks in accordance with applicable State and local regulations. A copy of the rinse/purge documentation and transportation manifest are presented in Appendix B. On December 18, 1996,prior to removal of the tank,a representative from the City of Lodi and the Lodi fire Department monitored the Lower Explosive Limit (LEL) levels in the tanks and approved the removal. Following the approval to proceed,Adams Services removed the tanks using a crane. The tanks were loaded onto a transport trailer, properly secured, and transported to Adams Steel facility located in Anaheim, California where the tanks were properly destroyed. The certificate of tank destruction is included in Appendix C. Concurrent with the tank removal program, Wayne Perry, Inc. removed the product dispenser, dispenser island, and vertical vent piping from the site. The dispensers, vertical vent piping, and miscellaneous concrete and asphalt debris were transported to a landfill for disposal. 3.3 SOIL SAMPLING On November 22, 1996, a representative of Blaes Environmental collected soil samples from the tank 4