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..5. 1 a 5 July 1995 AGE-NC-95-0124 Page 3 of 6 floor of the excavation All soil samples were collected from the excavator bucket using a metric soil sampler The samples were collected in 2 by 3-inch brass sleeves The ends of each sleeve were covered with aluminum sheets, capped and sealed with tape Each sample was then placed in a chilled container and transported under chain-of-custody to McCampbell Analytical, Inc (MAI) in Pacheco, California 1 The samples were analyzed for TPH-g and BTE&X in accordance with EPA methods 8015m and 8020, respectively All samples were collected under the direction of Mr Steve Sasson of the I PHS/EHD Analytical results of excavation soil samples are summanzed in Table 2 The laboratory ` report and chain-of-custody are included in Appendix C 1 As excavation proceeded, soil was screened for the presence of organic vapors using a photo- ionization detector(PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene) The soil was then segregated into "clean" and "contaminated" stockpiles 3 3 EXCAVATION OF HYDROCARBON IMPACTED SOIL, 28 APRIL 1994 on analytical results of soil samples collected on 27 Based up yt April 1994, the excavation was extended p to a depth of approximately 22 5 feet on 28 April 1994 A sample was collected from the floor of the excavation by GeoAudit (B-2) No additional soil was removed from the sidewalls and no sidewall samples were collected ' TPH-g was detected in sample B-2 at a concentration of 2 2 ppm BTE&X were detected in sample B-2 at concentrations ranging from 0 009 ppm to 0 041 ppm The analytical results are summarized in Table 2 The laboratory report and chain-of-custody are included in Appendix B 3 4 EXCAVATION OF HYDROCARBON IMPACTED SOIL, 6 MAY 1994 On 6 May 1994, the excavation was'extended to a depth of 28 feet Bob Evans Trucking (BET) of 1 Manteca provided the excavator and operator A single soil sample from the floor of the excavation was collected (B-3)by GeoAudit Four stockpile samples were also collected at this time Stockpile samples were composited 2 1 at the laboratory for analysis All soil samples were analyzed for TPH, BTE&X and total lead in accordance with EPA methods 8015m 8020 and 7420, respectively, No TPH or BTE&X were detected in sample B-3 The analytical results are included in Table 2 The ' laboratory report and chain-of-custody are included in Appendix B