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2.4 Soil Sample Analytical Results TPH-D was detected in one of the dispenser island soil samples, DI-01(5%2'), at a concentration of 210 parts per million (ppm). No other petroleum hydrocarbon analytes or fuel oxygenates were detected in the remaining soil samples collected from the tank excavation or stockpile. Soil sample analytical results are summarized in Table 1 and depicted in Figure 3. A copy of the chain of custody is included in Appendix E. w 3.0 Over-Excavation Activities and Results On August 12, 2003, under the supervision of Shaw, Gettler personnel over-excavated the former fuel dispenser island area using a backhoe. The over-excavated area was deepened to a depth of approximately 7.5 feet bsg, 2 feet below the original sample depth, and widened an additional 2 feet in the area of the former dispenser island. Approximately 7 cubic yards (9.49 tons) of soil were removed during over-excavation activities and stockpiled adjacent to the edge of the tank excavation. The over-excavated soils stockpile was segregated from the original tank excavation stockpile for future disposal, pending analytical results. Following over-excavation activities, one confirmation soil sample, labeled DIOE-01(8%'), was collected at the base of the excavation beneath the former fuel island. The soil sample was collected by pushing a sample tube into the soil, collected using the bucket of the backhoe, until full. After the soil sample was collected, the ends of the sample tube were covered with Teflon tape and capped. The soil sample was then appropriately labeled, placed in a cooler with ice, and transported under chain-of-custody protocol to the analytical laboratory- A copy of the chain of custody is included in Appendix E. '-' The sample was then submitted to McCampbell Analytical, Inc. for analysis for TPH-D and TPH-G using EPA method 8015 (modified), and BTEX constituents using EPA method 8021 B. +... The sample was further analyzed for the fuel oxygenates DIPE, ETBE, MTBE, TAME, and TBA using EPA method 8260B. A. No petroleum hydrocarbon analytes or fuel oxygenates were detected in the soil sample collected from the over-excavation of the fuel dispenser island area. A copy of the laboratory report and Oro chain of custody is included in Appendix E. Analytical results are summarized in Table 1 and depicted in Figure 4. CNCD110-7-0310:SHAREWS3103-0122.doc 4 v