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meter). Tubes were covered at both ends with aluminum foil <br />and sealed with plastic end caps. The samples were then <br />labeled, logged on a Chain -of -Custody form, and transported <br />to Analytical Sciences, a state -certified laboratory in <br />Petaluma, California. <br />Gasoline UST Excavation Sampling <br />After gas UST removals, soil samples designated 1TW, 1TC, <br />ITE were collected beneath the former 12,000 gallon tank, <br />samples designated 2TW, 2TE, 3TW and 3TE were collected <br />beneath the former remaining two tanks as directed by <br />Letitia Briggs. Soil samples were collected at approximately <br />14 to 16 feet below grade surface (bgs) from the excavation. <br />The approximate sample locations .are shown on Figure 2. <br />Sample depths and chemical summaries are found in Table A. <br />Trench Sampling <br />Trenches were excavated to expose and remove underground <br />product piping and vent lines extending from the fuel UST <br />complex to the service islands prior to Touchstone's <br />arrival. Soil samples designated Dl through D5 were <br />collected beneath the former product dispensers at <br />approximately 3 feet bgs. Samples designated P1 through P4 <br />were collected from the product piping trenches at depths of <br />3.5 to 4 feet bgs ( Figure 2). Samples were collected from <br />the trench bottom and then handled as described previously. <br />Sample depths and chemical analytical are summarized in <br />Table A. <br />Stockpile Sampling <br />Soils generated during the initial fuel UST and piping <br />removal activities were .stockpiled on and covered with <br />plastic visqueen behind the building. Approximately 160 to <br />200 cubic yards (cy) were generated from the removal and <br />excavation of the fuel USTs and piping. Samples designated <br />SP-1(a&b) through SP-4(a&b) were collected from the <br />stockpile (Figure 2). <br />Fuel UST stockpile samples each represent approximately 50 <br />cy. Initially, one sample was collected for every 20 to 25 <br />cy. Two samples were then composited in the laboratory and <br />analyzed as one sample, each representing approximately 40 <br />to 50 cy. <br />Stockpile soil samples were collected by removing the top 12 <br />to 16 inches of soil, pushing a clean 3" long (2" diameter) <br />brass tube into the stockpile until completely filled, then <br />removing, sealing and handling the sample tube with the same <br />protocol as described previously. <br />Page 2 <br />