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of soil were excavated from the vicinity of Tank #4 in 1992. The excavated soils were stockpiled at the 1320 West Weber facility for bioremediation. 3.0 PROPOSED SCOPE OF WORK The following scope of work is proposed at the North Union Street and West Weber Street facilities: Task 1: Health and Safety Plan Revision Task 2: Confirmation Sampling of Remediated Soils Task 3: Drummed Soil and Groundwater Disposal Management Task 4: Project Management Task 1: Health and Safety Plan Revision The site specific Health and Safety Pian (HSP) prepared for the Soil and Groundwater Investigation conducted in October 1994 has been revised to reflect the changes in the Scope of Work recommended in this Work Plan. The revised HSP is included as Attachment 1. Task 2: Confirmation Sampling of Remediated Soils The soils from the excavations at 425 North Union Street were stockpiled and treated at the 1320 West Weber Street facility. To assess the effectiveness of the remediation program, the stockpiled soils at West Weber Street will be sampled and analyzed. A field reconnaissance of the stockpiled soils was conducted by ICF Kaiser on April 4, 1995. The approximate dimensions of the soil stockpile are 125 x 260 feet with depths ranging from 1 to 3 feet. The soil was placed on visquene which appears to be in relatively good condition where visible. Based on an average depth of 2 feet, the volume of stockpiled soils is estimated at approximately 2,400 cubic yards. The soil stockpile will be gridded and twenty soil samples will be collected from the soil stockpile (approximately one sample for every 120 cubic yards of soil). The samples will be collected at the base of the stockpile (approximately 2- to 3-feet deep) with a hand-held drive sampler (slam-bar). The samples will be collected in 2-inch diameter by 4-inch long brass liners. After collection, each brass liner will be sealed with Teflone tape and plastic end caps, labeled, and placed immediately into a chilled cooler for transportation to a California certified laboratory. Strict chain-of-custody procedures will be followed during sample collection and delivery to the laboratory. The soil samples will be analyzed for extractable total petroleum hydrocarbons (TPH-e) using EPA Method 3550, gasoline range total petroleum hydrocarbons (TPH-g) using EPA Method 5030, and benzene, toluene, ethyl benzene, and xylene (BTEX) using EPA Method 8020. All sampling tools will be cleaned with Alconox (a laboratory-grade detergent) and double-rinsed with deionized water prior to use at each sample location. Mmam\unionic%l be wp 2