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11/11/98 WED 08:46 FAX 916 364 1889 SECOR—SACRAMENTO --� <br /> ARCO Products C0mpAny 1 2 <br /> -ARCO Scmicc Station 9 4497,Stockton,CA August 25,1998 <br /> Our objectives in performing the scope of work are: <br /> 1. To remove the underground storage tanks, product lines, and <br /> dispensers; and <br /> 2. Address areas of soil saturated with hydrocarbons using limited <br /> over-excavation, aeration, or other appropriate methods based on the <br /> levels 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 will be prepared for the site. The Health and <br /> Safety Plan will be reviewed by the Geld staff and contractors prior to beginning field <br /> operations at the site. <br /> Soil Sampling Activities <br /> During upcoming activities, SECOR will be onsite to observe the removal of the <br /> underground storage tanks, and to collect the compliance soil samples in accordance <br /> with SJCEHD requirements. The samples will be submitted under chain-of-custody <br /> documentation to a California State-certified analytical laboratory for analysis as <br /> described below. <br /> Management of Excavated Soil, Limited Over-Excavation, and Aeration <br /> If soils saturated with hydrocarbons arc encountered, limited over-excavation may be <br /> performed. Over-excavation, if performed, will be limited to approximately 50 to 100 <br /> cubic yards of soil. The area of possible over-excavation is shown as a dotted line on <br /> Figure 1. Over-excavation will be limited to soils above current groundwater levels. <br /> Groundwater is anticipated at approximately 10 feet below the ground surface. <br /> Upon excavation, the soil will be stockpiled in segregated piles for sampling and <br /> temporary storage. Characterization of the stockpiled soil will be performed by <br /> collecting one four point composite sample for every 100 cubic yards. With the <br /> permission of SJCEHD, clean stockpiled soil may be re-used as fill onsite. Depending <br /> on site conditions, and with the permission of the San Joaquin Valley Air Quality <br /> Management District, onsite aeration of impacted soil, may be performed. If aeration is <br /> not considered to be practical, the stockpiled soil will be covered with plastic sheeting <br /> pending transport and disposal at an approval landfill. <br /> 70600-022-01/W plan <br />