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MSI 94-20-01 ' On 8 August 1994, the pavement and soils overlying the UST and fill pipes associated with the UST was removed and the top of the UST was exposed by Banks & Co. The waste oil product fill piping ' was purged with nitrogen and water prior to disconnecting the piping from the UST ports. Following the removal of the fill pipes, residual contents were noted in the UST prior to rinsing. ' On 9 August 1994, this product was siphoned into a vacuum truck prior to rinsing the UST and the UST was triple rinsed using a pressure washer. Approximately, 450-gallons of waste oil product and rinseate, generated during rinsing, was siphoned into a vacuum ' truck and manifested to Petroleum Recycling Corporation (PRC) in Patterson, California for recycling. A copy of the uniform hazardous waste manifest, indicating the volume of material ' transported by PRC and showing signatory acceptance by this facility is attached to this report. On 10 August 1994, the appropriate amount of dry ice was ' placed into the UST; the Lower Explosive Limit (LEL) and oxygen content were monitored. When acceptable levels for LEL and oxygen were reached, the UST was removed. The UST was observed to have had four small holes and was moderately pitted when removed; some ' exterior oil product was noted on the side of the UST. The UST measured 41-inches by 44-inches had an approximate volumetric capacity of 250-gallons. This tank was designated 39-1219-10 and was marked accordingly prior to transport to West Coast Equipment in Turlock, California. During removal of the UST and the underlying concrete support 1 structure, all of the excavated soils were temporarily stockpiled onsite. Because of safety considerations, the excavation was completely lined with a Typlar geo-fabric and backfilled using 3/8- inch diameter pre-washed, pea gravel to within 6-inches below site ' grade (BSG) . The excavation was capped with portland-cement concrete to site grade . The former location of the UST is presented on the attached tank removal and soil sample location map. SAMPLING PROCEDURES AND ANALYTICAL RESULTS 1 On 10 August 1994, following the removal of the UST, Mr. Steve Sasson of the PHS-EHD specified that three confirmatory soil samples would be required to be collected from specific depths. A ' concrete support structure was present directly beneath the former UST location. Following the removal of this structure, Mr. Sasson directed MSI to collect samples from directly beneath and at each ' end of this structure, beneath-adjacent to the former UST location. Additionally, Mr. Sasson directed MSI to collect a composite soils sample from the stockpiled soils to complete a chemical profile for acceptance to a recycling/disposal facility. 2 ' MOORE SERVICES, INC.