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ARCO Products Company 2 <br /> ARCO Station 92133,2908 Benjamin Holt Drive,Stockton,CA Febmary 18,1999 <br /> Underground Tank Sites. Field and laboratory procedures are included as <br /> Attachment A. <br /> Our objectives in performing the scope of work are: <br /> 1. To upgrade the product lines to meet the 1998 UST standards; and <br /> 2. Address areas of soil contaminated with hydrocarbons using limited <br /> over-excavation or other appropriate methods based on the levels <br /> encountered. <br /> Site-Specific Health and Safety Plan <br /> As required by the Occupational Health and Safety Administration (OSHA) "Hazardous <br /> Waste Operations and Emergency Response" guidelines (29 CFR 1910.120), and by <br /> California Occupational Health and Safety Administration (Cal-OSHA) "Hazardous <br /> Waste Operations and Emergency Response" guidelines (CCR Title 8, Section 5192), a <br /> Site-Specific Health and Safety Plan has been prepared for the site. The Health and <br /> Safety Plan will be reviewed by the field staff and contractors prior to beginning field <br /> operations at the site and is included as Attachment B. <br /> Soil Sampling Activities <br /> During upcoming activities, SECOR will be onsite to observe the removal of the product <br /> lines and to collect soil samples in accordance with SJCEHD requirements. The samples <br /> will be submitted under chain-of-custody documentation to a California State-certified <br /> analytical laboratory for analysis as described below. <br /> Laboratory Procedures <br /> Soil samples collected during dispenser upgrade activities will be submitted to the <br /> laboratory and analyzed for the presence of total petroleum hydrocarbons calculated as <br /> gasoline(TPH-g), benzene, toluene, ethylbenzene, xylenes (BTEX compounds), and <br /> methyl tertiary butyl ether(MtBE) by EPA Methods 8015 and 8020. <br /> Management of Excavated Soil and Limited Over-Excavation <br /> If soils contaminated with hydrocarbons are encountered, limited over-excavation may <br /> be performed. Over-excavation, if performed, will be limited to approximately 50 to 200 <br /> cubic yards of soil. The area of possible over-excavation is shown as a dotted line on <br /> Figure 1. The maximum vertical extent of the over-excavation will be based on the limits <br /> of the excavation equipment; which is approximately 10 to 12 feet. <br /> Upon excavation, the soil will be stockpiled in segregated piles and covered with plastic <br /> sheeting at the site for sampling and later disposal. Stockpiled soil will be temporarily <br /> stored on the northern portion of the site. All stockpiled soil will be sampled at one <br /> composite sample for every 100 cubic yards and will be analyzed for TPH-g, BTEX, and <br /> 76600-019-04/WPLAN <br />