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Shell Oil Company CRL1 April 19, 1995 (9447-8617) ' — T 3.2 UST Removal, Initial Soil Sampling and Analysis tOn December 2, 1994, Fugro personnel witnessed the excavation and removal of four single-walled steel gasoline USTs (two 10,000-gallon and two 6,000-gallon) and associated pump islands and piping by Golden West General Contractors (Golden West) Visual inspection of the ' tanks did not reveal any holes The tanks were triple-rinsed by Crosby and Overton, Inc and transported to the Erickson Inc disposal facility located in Richmond, California The waste manifests for rinsate and tank disposal are included in Appendix D tEric Travena of the SJCDEH observed the UST removal, but left the site shortly thereafter Because a SJCDEH representative is required to witness all regulatory-required ' sampling, soil samples were not collected beneath the former USTs, piping and pump islands until December 6, 1994 Meanwhile, Fugro collected 18 soil samples (SPI-A and B through SP9-A and B) from approximately 450 cubic yards of soil stockpiled on the site during ' excavation activities Between December 2 and 6, 1994, Golden West removed an additional 150 cubic yards ' of soil from the bottom of the UST excavation in anticipation of installing two new 15,000-gallon double-walled fiberglass tanks On December 6, 1994, Fugro personnel, under Eric Travena's direction, collected soil samples from the base of the UST excavation (approximately 18 5 feet bgs), an estimated 6 feet below the ends of the two former 10,000-gallon gasoline USTs (ES3, EN3, ES4, and EN4) and ' the former northwestern 6,000 gallon UST (ES2 and EN2) Two soil samples were also collected approximately two feet (14 5 feet bgs) below the ends of the former southeastern 6,000-gallon UST (ESI and ENI) Additionally, six soil samples (TI-T6) were collected beneath the former piping and pump islands at approximately 4 5 feet bgs Four soil stockpile samples were collected from the additional excavated soil (OSPI-A, OSPI-B, OSP2-A and OSP2-13) fInitial excavation and stockpile soil sampling locations are shown on Figures 2, and 4 The initial UST, piping and pump island excavation samples were analyzed within 24 to 48 hours Soil sampling analytical results are summarized in Tables 1 and 3 All soil samples were delivered under chain-of-custody to National Environmental Testing, Inc (NET) of Santa Rosa, California, a State-certified analytical laboratory The samples were analyzed for total petroleum hydrocarbons (TPH) as gasoline, by Modified EPA Method 8015, benzene, toluene, ethylbenzene, and total xylenes (BTEX), by EPA Method 8020, and Total Lead Selected stockpile samples were also analyzed for organic lead and metals Analytical reports and chain-of-custody forms are included in Appendices B and C I94478617 BRP- - - - - -` - - 3