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r .s and soil was excavated from the tank pit and dispensers areas during tank removal and was • subsequently returned to the tank pit as fill Field Methods Exploratory Borings Six exploratory borings were drilled at the locations shown on Figure 1 Drilling permits were secured from PHS EHD, and a utility clearance was performed prior to doing the fieldwork The boreholes were dnlled with GeoProbe truck mounted drilling equipment Boring locations were adjusted in the field due the proximity of numerous subsurface utilities All drilling equipment and sampling tools were cleaned prior to arriving, between boreholes and before leaving the site The sampler was retrieved and dissembled, and the soil filled acetate liner retained for analysis was sealed with Teflon paper or foil and plastic endcaps, labeled, logged onto chain-of-custody forms and place in a chilled ice chest on crushed ice Soil sample intervals retained for chemical analysis were cut from the liners at depths of suspected contaminant presence or interest The boreholes were logged using the Unified Soil Classification System under the supervision of a registered geologist Additional lithologic information was collected to describe the subsurface geology Soil samples were field screened for petroleum soil vapor using a photoionization vapor meter calibrated to the manufacturers specifications Interval samples were collected at • minimum five-foot intervals, at intervals of suspected contamination and at stratigraphic features of interest Upon completion of the borehole drilling and collection of water samples, all boreholes were backfilled with grout, placed from the bottom to top of the borehole and a PHS EHD representative witnessed the sealing process and portions of the drilling and sampling Groundwater Sampling Each exploratory boring was sampled The ground water samples collected from the boreholes were used for a reconnaissance of the site groundwater contamination A brief summary of these procedures follows Each borehole was advanced into the aquifer and temporarily cased for sampling Depth to groundwater measurements were made to the nearest one-one hundredth of one foot, and also checked for the presence of separate phase product The water entering the borehole was sampled using a clean disposable bailer or downhole sampling tube, and carefully poured into the appropriate laboratory prepared container with minimum cavitation Each water sample was labeled, logged onto a chain-of-custody form, and placed in a chilled ice chest for transport to the laboratory Subsurface Conditions Six borings were advanced on the site Boring B-3 was continuously cored adjacent to the former tank pit The borings revealed sandy clay and sandy silt to depths of nine to 14 feet below surface grade A sequence of interbedded sand. sandy clay and clayey sand under the clay and Page 2 of 8