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Advanced <br /> GeoEnvironmental, Inc. =0=- <br /> 04 August 1998 <br /> AGE-NC Project No. 97-0381 <br /> Ms. Letitia Briggs <br /> San Joaquin County PHS-EHD <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Work Plan for Product Pipe Abandonment <br /> Ochoa Property - Former Skeeters Auto <br /> 430 South EI Dorado Street, Stockton, California <br /> Dear Ms. Briggs: <br /> In accordance with a request from the property owner and agents,Advanced GeoEnvironmental,Inc. <br /> (AGE)has prepared this work plan to obtain closure of the product lines associated with the 3,000- <br /> gallon and one 4,000-gallon underground storage tanks (UST's) removed from the site on 18 <br /> December 1997 (Figure 2 -Site Plan). <br /> The product lines were removed during excavation of the UST's, however, two inactive lines <br /> extending west of the site under El Dorado Street were disconnected from the northernmost UST. <br /> Historical property lines were approximately forty feet west of the current site boundary. The <br /> inactive product lines extend west of the current boundary. AGE proposes to abandon the product <br /> lines in place. Both ends of each product line will be exposed. The pipes will be rinsed with cleaning <br /> agents. Neat cement will be used to fill each pipe under pressure. <br /> Soil samples will be collected at a depth of two feet below the pipe-lines,with a minimum of one <br /> sample per twenty linear feet. One sample will be collected from the terminal end of the pipe in the <br /> suspected area of a former dispenser island. The samples will be analyzed for the following: <br /> • total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> method 8015-modified, <br /> • purgeable aromatics (benzene, toluene, ethylbenzene and total xylenes: BTE&X) in <br /> accordance with EPA method 8020 <br /> • total lead in accordance with EPA method 7421, <br /> • oxygenating fuel additives methyl tertiary butyl ether(MTBE),tertiary butyl alcohol(TBA), <br /> di-isopropyl ether(DIPE), ethyl tertiary butyl ether(ETBE) and tertiary amyl methyl ether <br /> (TAME) in accordance with EPA method 8260m. <br /> 4005 North Wilson Way,Stockton,California 95205 <br /> Telephone(209)467-1006 FAX(209)467-1118 <br />