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Site Assessment Work Plan` ormer UST No. 1 American Moulding and Mi lwoirk Company 2801 North.West Lane, Stoc kton, California - PHS-EHD.Site Code 18822 , 1.0. INTRODUCTION In accordance with the request of Mr. Bernie Sloop of' erican Moulding and,Millwork Company (AMM)Advanced GeoEnvironmental, Inc. (AGE)has p epared this work plan.to verify removal of hydrocarbon-impacted soil associated with an.'unauthorized release from the-former UST No. 1 facility. This work plan has been prepared'as directed by the County of Sari Joaquin Public Health Services - Environmental Health Division(PHS-EHD)-by letter on 03 March 1999 and as discussed with Ms. Carol Oz of the PHS-EHD'on 19 May-1999..1.he scope of work includes: • Preparation of this Work Plan;. ` • Preparation of a Health and Safety Plan; • Advancement of one soil boring to 50 feet bsg i jhe former dispenser-area excavation and a second soil boring in the former UST pit to 5 feet bsg to collect soil and ground water samples;. * Obtaining laboratory analysis of the.ground water samples and selected soil samples; and • Preparation of a,Site Assessment Report or Closure Summary Report, as-appropriate. The setting of the subject site is illustrated in Figure 1. A site plan showing'structures and boring,, locations on the subject property are shown on:Figure 2. This work plan is prepared.in accordance with PHS-EHD and Central Valley Regional Water Quality Control Board (RWQCB) guidelines. 2.0. BACKGROUND A 10,000-gallon, steel underground storage tank (USTI was utilized for diesel fuel on the site as early as 1983. The UST system failed a precision test on 18 November 1988 and a product line was repaired on 15 December 1988. The UST was removed under.inspection by the PHS-.E HD on 27 August 19.93. Two soil samples were collected from beneath the former=UST location an two samples were collected from beneath:the product line piping. The samples collected.under the north end of-the UST and the north end of the product line contained,less than. detectable.conceiltrations of total petroleum hydrocarbons quantified as gasoline (TPH-g), total petroleum hydrocarbons quantified as diesel_(TPH-d), and benzene,toluene, ethylbenzene and xylenes (BTEX). TP -g and TPH-d were detected in the south = . Advanced GeoEnvlronmenlal,Inc.