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- - 15 September-1995 AGE-NC Project No 95-0105 Page 4 of 7 ' installed next to Parker Avenue west of the building, trench T2 was installed at the northwest corner of the site, trench T3 was installed near Grant Line Road at the northeast corner of the former tank excavation B, trench T4 was installed at the northwest corner of the building One soil sample each ' was collected from trenches T1, T2 and T4 Two samples were collected from trench T3 Three samples were also collected from the April 1995 soil stockpile Trenching and sampling locations are ' shown on Figure 3 Excavation was resumed on 26 June 1995 The April excavation was extended to the north toward Grant Line Road, to the west toward Parker Avenue and to the south along Parker Avenue Approximately 125 cubic yards of soil were removed during the June 1995 excavation Seven soil samples were collected from the side walls of the excavation at depths between 5 5 to 6 feet Excavated soil was transported and disposed with soil excavated in April 1995, all soil was disposed at Forward Landfill in Manteca, California The limits of excavation and sample locations are shown on Figure 4 Disposal certificates are included in Appendix C 1 All soil samples were collected using 2 by 3-inch brass sleeves Both ends of each sleeve were covered with Teflon sheets or aluminum foil, capped and sealed with tape Samples were placed in M a chilled container and transported under chain-of-custody to a state-certified laboratory The May samples were transported to MAI and the June samples were transported to WEST laboratories Samples were analyzed for TPH-g and BTE&X in accordance with EPA methods 8015m and 8020, ' respectively The three stockpile samples were composited at the laboratory and analyzed for total lead in accordance with EPA method 6010 in addition to the discrete analysis for TPH-g and BTE&X 3 6 EXCAVATION BACKFILLING ' On 26 and 27 June 1995 the excavation was backfilled using imported fill sand, supplied by Conti P Materials Service, Inc Compaction was performed using a rolling/vibrating compactor The ' compactor and operator were supplied by Stokley Construction Compaction tests were performed to the west and north of the building A minuinum of 90% compaction was obtained for both tests ' The compaction tests were performed by Arrowhead Consultants A new asphalt surface was then applied over the entire site Results of compaction testing are included in Appendix D Backfill material certificates are included in Appendix E 1