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h fil • Mr Paul Supple Project 20805-140 003 April 30, 1998 Page 5 A total of eight soil samples, one soil sample from the base of each pothole, were collected (see Figure 3) Pinnacle personnel collected soil from the excavator bucket by removing 3 to 6 inches of soil and driving a brass sample tube into the remaining soil The sample tube was sealed with Teflon tape and plastic end caps, labeled, and placed in an iced cooler for transport to a state-certified analytical laboratory with chain-of-custody documentation Soil underlying and adjacent to the former product lure trenches and dispensers consisted of brown to yellowish-brown (with localized gray mottling) silt to clayey silt to depths of approximately 4 feet bgs Slight to moderate petroleum hydrocarbon odors were present in samples PL-3 and PL-10, respectively No other product line trench samples had an odor Nine compliance samples (PL-1 through PL-9) were collected, using a drive-hammer, from soil underlying the fiberglass product piping at approximately 20-linear-foot spacing and at a depth of 3 feet below grade (see Figure 3) Eight additional soil samples (PL-10 through PL-17) were collected from soil beneath the second set of metal product piping at approximately 20-linear-foot spacing and at depths of 3 5 to 4 feet below grade Sampling procedures were consistent with those described above Compliance soil sample T-5 was collected at a depth of 7 feet bgs from beneath the waste oil UST Soil underlying the tank was brown silt and did not have a petroleum hydrocarbon odor Approximately 250 cubic yards of soil excavated from the former UST locations were stockpiled for use as backfill material Pinnacle sampled the stockpile (SP-1) at a frequency of two samples per 50 cubic yards and subrmtted samples SP-l-1 A/B through SP-1-5A/B for profile analysis An additional 40 cubic yards of stockpiled soil (SP-3) excavated from the product hne trenches during the removal of the second set of metal product piping was sampled at a frequency of two samples per 40 cubic yards Stockpiles SP-1 and SP-3 were subsequently used to backfill the former UST cavity at depths of 4 to 12 feet bgs Pinnacle also sampled the soil stockpile generated during the removal of the waste oil UST Stockpile SP-2 was sampled at a frequency of two samples per 11 cubic yards, and the samples (SP-2A/B) were submitted to the laboratory for analysis for waste disposal parameters SAC%NNPJ(TD805U0514003FS-991pmsmer L � �