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TreadvvelUMlo After reviewing analytical results, the pump islands were excavated and confirmation samples were collected beneath TP-A, on the north, south and west walls of the excavation(Figure 2) With the exception of confirmation samples CPT-EXC-BT19 and CPT-EXC-N15, TPH-g, TPH-d, total petroleum hydrocarbons as motor oil (TPH-mo), MTBE and BTEX compounds were not detected above laboratory reporting limits (Table 3) In CPT-EXC-BT19 and CPT- ' EXC15, TPH-g was detected at 2,300 and <5 1 mg/kg, respectively TPH-d was detected at 700 and 27 mg/kg, respectively Ethylbenzene concentrations ranged between 0 24 mg/kg in CPT- , EXC-N15 to 23 mg/kg in CPT-EXC-BT19 Xylene concentrations ranged between 0 61 mg/kg m CPT-EXC-N15 to 76 mg/kg m CPT-EXC-BT19 Toluene was only detected in confirmation sample CPT-EXC-N15 at 0 023 mg/kg 5.5 Soil Stockpile Sampling and Disposal Soil from the excavation was placed in stockpiles and covered with visqueen On 10 and 16 June and 1 July 2004, one 4-point composite soil sample for approximately every 100 cubic yards of soil was collected from each of the soil stockpiles for a total of 20 samples Each laboratory- composited sample was analyzed for TPH-g, TPH-d, TPH-mo, BTEX, MTBE, and lead Table 4 shows the analytical results for the composited stockpile samples Appendix B presents the laboratory analytical results rOn the basis of the laboratory analytical results, approximately 360 cy of stockpiled soil were disposed of as non-hazardous Class H material at Forward Landfill in Stockton, California Approximately 100 cy of soil with elevated lead concentrations represented by sample CPT-EX- 5-COMP, is still on-site awaiting offsite disposal Appendix D includes copies of the landfill ' non-hazardous waste manifests and weight tags ' 5.6 Soil Import and Backfill The shored excavation was backfilled on 16 and 17 June 2004 The pump island excavation was backfilled the week of 12 July 2004 Backfill material was used from other areas at the Banner ,� 25971020 DGD 9 23 August 2004