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■ TPH-d by EPA Method 8015M, <br /> ■ TPH-g by EPA Method 8015, <br /> a BTEX by EPA Method 8020, and <br /> a Total lead by EPA Method 7421. <br /> The analytical results indicated that trace residual concentrations of petroleum <br /> hydrocarbons remained in the floor and the north and south walls of the dispenser island <br /> excavation. Petroleum hydrocarbon concentrations in the floor samples did not exceed 13 mg/kg <br /> TPH-d, 1.5 mg/kg TPH-g, 0 065 mg/kg benzene, and 0.053 mg/kg ethylbenzene. Concentrations <br /> in the north wall did not exceed 150 mg/kg TPH-d, 20 mglkg TPH-g, 0 0065 mg/kg benzene, <br /> 0 290 mg/kg ethylbenzenc, and 2 6 mg/kg total xylenes In the south wall, concentrations for <br /> TPH-g and BTEX were below laboratory method detection limits and did not exceed 77 mg/kg <br /> for TPH-d Total lead concentrations in all samples ranged from 0.8 mg/kg to 8 0 mg/kg, well <br /> below the T= levels as designated by CCR Title 22 <br /> Analytical results for confirmation soil samples from the excavation walls and floor are <br /> presented in Table 24 Soil sampling locations are identified in Drawing 2-3 Copies of <br /> laboratory reports and Chain-of-Custody records are included in Appendix B <br /> 2 2 4 Fuel Dispenser Island Excavation Backfilling <br /> After review of the confirmation sampling results with the EBD, the excavation was <br /> backfilled with Class II road base and compacted <br /> 23 Soil and Air Monitorin <br /> During the course of excavation activities, a photoionization detector (PID) and the <br /> immuno-assay procedure (IAP) were used by MARK for field monitoring <br /> 61 <br /> FASCLOSE 2 2-5 92-1177102 36 <br />