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1� [T C A M B R I A Soil Types: Soil types encountered during drilling consisted predominantly of clayey and sandy silt (ML) to approximate depths of 13 5 to 17 5 fbg, underlain by a silty sand (SM)/sand (SP) layer to 19 fbg, underlain by sandy and clayey silt (ML) to depths of 36 to 39 fbg, underlain by silty sand (SM) to depths of 38 5 to 42 fbg A layer of clayey silt (ML) was encountered in boring B-4 from 38 5 to the total explored depth of 42 fbg Soil types from the well borings are recorded on the boring logs (Appendix B) AINNIL Groundwater Depths During drilling activities, groundwater was observed in each boring at 415 fbg No evidence of perched water was observed in either boring Groundwater Sampling: Cambria collected one grab groundwater sample from each boring at 415 fbg using a disposable bailer _ Chemical Analyses• Selected soil and groundwater samples from the soil bonngs were analyzed for TPHg, benzene, toluene, ethylbenzene, and xylenes (BTEX), fuel oxygenates (MTBE, di-isopropyl ether, tertiary amyl methyl ether, ethyl tertiary butyl ether, and tertiary butanol), and lead scavengers (1,2-dicloroethane and 1,2- dibromoethane)by EPA Method 8260B Soil Disposal Soil generated during field activities was stored onsite, and covered with plastic sheeting The soil stockpile was sampled and profiled for disposal (laboratory data in Appendix C) On November 13, 2002, Manley and Sons Trucking, Inc of Sacramento, California transported the soil weighing approximately 3 tons to Allied Waste Industries' Forward Landfill in Manteca, California for disposal(Appendix D) HYDROCARBON DISTRIBUTION IN SOIL No TPHg, BTEX, fuel oxygenates, or lead scavengers were detected in soil samples collected from the soil borings The soil chemical analytical data (including data from previous investigations) are summarized in Table 2 and TPHg, benzene, and MTBE concentrations from 0832 4