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the California Code of Regulations (CCR), Title 22 Cadmium and lead were not detected Analytical results are summarized in Table 4 ' 4.1.3 Stockpiled Soil Petroleum hydrocarbon impacted soil was underlain and covered with 6-mil plastic sheeting One 4- sleeve composite sample was collected from the stockpiled soil and analyzed for BTEX and TPHd by the methods described above as well as for HVOs, total threshold limit concentration (TTLC) metals, ' and corrosivity, ignitabihty, and reactivity TPHd (460 ppm) was detected in the composite sample from the stockpiled soil Reported concentrations of detected metals (Table 4) were well below their respective TTLC values The excavated soil was transported to Forward Landfill in Manteca, California for disposal Copies of the non-hazardous waste manifests are included in Appendix D ' 4_2 Assessment of Soil Contamination In October 1991, a RESNA geologist supervised the drilling of one angle and five vertical soil borings to assess subsurface conditions at the project site An experienced field geologist was present to continuously log all drill cuttings and soil samples Cored soil samples were collected at 5 foot intervals in the vertical borings and from the bottom of the angle soil boring Soil samples were field ' screened with a photoionization detector (PID) and selected samples were analyzed for TPHg, TPHd, BTEX, and soluble lead Sample locations are shown on Figure 4 Analytical results of collected soil samples indicated that gasoline impacted soils were limited laterally to a relatively small area near the former gasoline fuel storage tanks On March 2, 1992, RESNA advanced one boring MW-1 to a depth of 85 feet below grade and completed it as monitoring well Soil samples were collected every five feet and screened with a PID Samples from depths of 40 5 feet, 50 0 feet, 55 5 feet, and 65 5 feet were submitted for analysis of TPHg and BTEX Laboratory analyses of samples collected from MW-1 indicated that near-water ' soils had been impacted by gasoline hydrocarbons in the vicinity of MW 1 In October 1993, RESNA supervised the installation of six soil borings Three borings were drilled to a ' depth of approximately 85 feet below grade and completed as groundwater wells MW-2, MW-3, MW- 4 The other three borings were drilled to a depth of approximately 50 feet below grade and completed ' as vapor wells VW-1, VW-2, and VW-3 The boring locations are shown on Figure 2 Soil samples were collected at five foot intervals and screened with a PID The soil lithology, sample collection depths and petroleum hydrocarbon concentrations detected by the PID were recorded by the field ' geologist on the well logs Three to four soil samples from each boring were submitted for analysis of TPHg and BTEX i ' Analytical results of soil samples indicated that soil impaction associated with the former gasoline storage tanks was hn-uted to the unmediate vicinity of the former tank locations and beneath the former fuel pump island No hydrocarbons were detected in any soil samples collected from borings MW-2, W 195141NquanlyMW-1995 doe 4 • I SMTH