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`, •i end caps. the plastic end caps will be sealed to the liner with plastic tape. Each sealed liner will be labelled and placed on ice for storage and transportation. Samples from approximately 15 feet below ground surface to approximately 35 feet in each boring (four samples from each well) will be submitted under chain-of-custody to Pace Laboratories in Novato,California where the samples will be analyzed for total petroleum hydrocarbons and benzene,toluene,ethylbenzene,and xylenes by EPA method 8015 (the detection limit for BTE&X is 0.0005 mg/kg). Pace Laboratories is certified by the California Department of Health Services Hazardous Materials Laboratory to perform hazardous and toxic analyses for metals and inorganic and organic parameters as defined by Title 22 of the California Administrative code under certificate number 148. The other two liners will either be emptied or retained for reference. The contained soils in one liner will be scanned for petroleum hydrocarbons with either a PID or FID organic vapor detector. The soils will be described according to the Unified Soil Classification System by a qualified geologist. Additional soil samples will be analyzed if the scanning warrants the attention. After the ground-water monitoring wells (MW7,MW8, MW9, and MW10) have been allowed to stabilize for at least 24 hours,each well will be developed by hand surging with a flapper-valve surge block and a bailer. Well development will continue until clear water is discharged from the well or four hours, whichever is first. After well development, the appropriate volume of water will be purged from each wells; approximately 3 to 5 casing volumes of water will be purged from each well until the pH,conductivity, and temperature in three successive bailers have stabilized. The ground water from all eight onsite wells and two offsite wells will be sampled with a clean 2-inch teflon or stainless steel bailer on a hand-held polypropylene line. The samples will be poured quietly from the bailer into 40 ml VOA vials. The vials will be sealed with teflon lined caps, labelled, and placed on ice for storage and transportation. The ground- water samples will be submitted for analysis under chain-of-custody to Pace Laboratories. The samples will be analyzed for total petroleum hydrocarbons and BTE&X by EPA method 8015. All development and purge water will be contained in barrels and stored onsite within a fence. Later disposal of the contained water will be based on the analytical results from each well. 10