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Frank C. Alegre Trucking Company, Inc. 4203-172A Former Trucking Facility May 5, 1997 DRAINAGE POND REMEDIATION WORK PLAN Page 2 Health and Safety Plan A site-specific safety plan is provided as an attachment. The safety plan addresses physical and chemical hazards, identifies site personnel, and provides emergency response information. Based on the reported laboratory testing conducted to date, ENGEO does not anticipate that significant chemical hazards will be encountered during the remedial activities. The safety plan will be maintained on site during the excavation and sampling. Soil Excavation A track-mounted excavator will be used for soil removal. The fill material will be removed from the former drainage pond and segregated to the extent feasible during excavation. A screening unit will be mobilized to separate concrete and other inert material from the fill. The excavation will be extended laterally and vertically based on field observations and vapor screenings. ENGEO anticipates an excavation 12 to 18 feet in depth over an area of±1,800 ft' to 2,400 f. The specific volume of soil to be removed is not known. ENGEO estimates that 1,000 to 1,500 cubic yards of soil will be excavated. Once physical observations and field screenings indicate the affected soils have been removed, discrete soil samples will be recovered from the excavation base and sidewalls at approximate 20- foot lineal intervals. The specific location and depth of the confirmation samples will be determined in the field. ENGEO estimates that 15 to 18 samples will be recovered from the excavation for laboratory analysis. Composite soil samples, if required by Forward, Inc., will also be recovered from the soil stockpile(s). The specific number of stockpile samples and scope of laboratory profiling will be determined at the discretion of Forward,Inc. The soil samples will be recovered in 2-inch-diameter 6-inch-long stainless steel tubes sealed with Teflon plastic end caps and tape. The samples will then be labeled and placed in a cooled ice chest prior to transportation to the analytical laboratory. The limits of the excavation will be field surveyed by ENGEO personnel. The limits of the excavation will also be documented through photography. Laboratory Anal The proposed selection of the laboratory analyses is based on previous laboratory data compiled for the site. The excavation samples will be tested for total volatile and extractable hydrocarbons (EPA 8015), BTEX (EPA 8020), volatile organic compounds (EPA 8240), total recoverable hydrocarbons (EPA 418) and metals. Laboratory services will be provided by American Environmental Network(AEN)in Pleasant Hill, California(DOHS#1172).