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1" KLEINFELDER November 5, 1987 File: 24-2075-1 Mr. Keith A. Tallia Oil Equipment Service P.O. Box 950 San Andreas, CA 95249 SUBJECT: Soil Sampling; 100 Ventura Street, Stockton Dear Mr. Tallia: Kleinfelder was retained by Oil Equipment Service to perform soil sampling for chemical analysis. No site investigation or data analysis was included in the scope of work. Enclosed are the analytical results for the soil sample collected from the site at 100 Ventura Street, Stockton, California. Summary of Work On October 15, 1987, one 5,000 gallon underground tank was excavated and removed by Oil Equipment Services and the tank backfill material was removed down to native soil. This tank reportedly contained diesel fuel. Ms. Donna Heran, Registered Sanitarian, of the San Joaquin Local Health District specified the sampling location and chemical analyses. Sample 31336 was collected by Kleinfelder from the bottom of the south end of the excavation (where the tank fill spout had been located) at a depth of approximately 15 feet below grade. The sample was collected by driving a brass tube into soil extracted from the pit by a backhoe. The brass tube was then capped with aluminum foil and plastic end caps and was stored in an iced sample container. The sample was submitted under chain-of-custody to CHEMWEST Analytical Laboratories, Inc. in Sacramento. The sample was analyzed for total petroleum hydrocarbons by GC-FID and purgeable aromatic compounds (BTX) by EPA 8020. All constituents analyzed were below laboratory reporting limits except for TPH (as diesel) detected at 130 mg/kg. Laboratory data sheets and a chain-of-custody form are included at the end of this report. G�S�„/6%� I. 11 13tt�L��711 � t� KLEINFELDER 9795 Business Park Drive, Suite C, Sacramento, CA 95827 (916) 366-1701 7_ Z 7/2