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\r V 1.0 Introduction On behalf of SBC, Shaw Environmental, Inc. (Shaw)was contracted to provide environmental consulting services during the removal of a 2,000-gallon diesel underground storage tank(UST) and associated piping from the SBC facility located at 7644 North Ashley Lane in Stockton, California(Figure 1). SEC's construction management contractor, Roebbelen Construction, Inc., subcontracted TAIT Environmental(TAM to provide and operate equipment to perform the UST removal. Ocampo-Esta Corporation(OE)was subcontracted by SBC's alliance architect to provide engineering and permitting services. UST removal work discussed in this report was completed in compliance with local and state regulatory requirements in September 2004. 1.1 Site Description The SBC property is located in a predominantly agricultural area of Stockton,California. A one- story building used for housing telecommunications equipment and offices occupies the center of the site. The remainder of the site is used for parking of SBC fleet and employee vehicles (Figure 2). To the north of the SBC building was a 2,000-gallon UST which contained diesel fuel used for fueling the on-site emergency backup generator. As SBC has installed an aboveground storage tank(AST)for the existing generator,the UST was scheduled for removal. 1.2 Permits Prior to initiation of excavation activities, OE obtained permits for the tank removal from the San Joaquin County Environmental Health Department(SJCEHD). Copies of the permits are included in Appendix A. Prior to removal of the tank,a representative of the SJCEHD was scheduled to observe the tank removal activities. 2.0 UST Removal Field Activities 2.1 Tank Removal On September 14, 2004,TAIT personnel began excavation activities with the removal of the pea gravel fill material around the tank. The removed fill was placed on plastic adjacent to the excavation. CNCD\O:SHARE\USTT0"222.dm I