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V � September 18, 1990 90-01377.18 Mr. Edward J. Gotelli Mid-Cal Leasing Subject: Removal of Underground Fuel Storage Tank 1649 Lust Channel Street Stockton, California Page 2 i 3 i The fuel tank was triple rinsed using pressured water and detergent. Following cleaning, it was cut into three sections and hauled to FMC Metals ` In Stockton, California where it was disposed of as scrap steel. The record of the tank disposal is attached as Appendix B. The rinsate developed from the tank decontaminating process was pumped into a 55-gallon drum. EPA generator Number CAC 0000282809 was painted with "] fluorescent paint on the side of the drum. The rinsate will be shipped off { site by Falcon Energy Associates of Stockton, California in October 1990 for destruction by incineration. The Hazardous Waste Manifest for the shipment of the rinsate will be sent following this report upon its arrival at our office. i Soil samples preserved in 2-inch diameter brass tubes were obtained from the bottom of the tank pit using the backhoe bucket in accordance with the procedures prescribed by Title 23, Chapter 3 Subchapter 16 of the California Code of Regulations, (CCR) and as directed by Miss Carol Oz. The sampling locations are shown on Drawing 2. Two soil samples were taken from beneath the floor of the tank pit, one at the easterly end and one at the westerly end. The sample tubes were sealed with teflon sheets and plastic end-caps. They were then labeled and placed in a cooler packed with chemical ice. The samples were transported under Chain-of-Custody control for • analysis at FGL Environmentals Laboratory in Stockton, California, (State of California Laboratory, Certification No. 336) . The soil samples were analyzed according to the requirements of Subchapter 16 of Title 23 of the CCR and the guidelines issued by the San Joaquin County Department of Health. The analyses performed are described below (the analytical procedures are noted parenthetically following each group of analyses) : ■ Benzene, Toluene, Xylene, and Ethylbenzene (EPA Method 8020) i s . Total Volatile Hydrocarbons - (as Gasoline) (EPA Method 8015 - DHS Modified Procedure) ■ Ethylene Dibromide (EPA Method 8010) ■ Total Lead (EPA Method 7420) The Chain-of-Custody documentation (including the Request-for-Analysis) s and the Certificates of Analysis issued by the laboratory are attached as t Appendix C. The analytical results are summarized in Table 1.