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Rs • CAMBRIA Sod Types Encountered Soil types encountered while drilling the borings consisted primarily of silt and clay with lesser amounts of sand (Appendix B) Soil Chemical Analyses Selected soil samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX), fuel oxygenates (methyl tertiary butyl ether [MTBE], tertiary amyl methyl ether, tertiary butyl alcohol, di-isopropyl ether, ethyl tertiary butyl ether), and lead scavengers (1,2-dichloroethane [1,2-DCA] and 1,2-dibromoethane) by EPA Method 8260B Groundwater Analyses Groundwater samples were analyzed for TPHg, BTEX, fuel oxygenates, and lead scavengers by EPA Method 8260B Well Destruction: Groundwater monitoring well MW-16 was destroyed by over . drilling with 10-inch hollow-stem stem auger, the casing was removed, and the hole was back filled with neat cement Soil Disposal• Soil cuttings generated during the well destruction activity were stored onsite, placed on, and covered with plastic sheeting The soil was sampled and profiled for disposal The soil cuttings sample results are contained in Appendix C The soil will be transported to Allied Waste Industries' Forward Landfill in Manteca, California for disposal upon approval HYDROCARBON DISTRIBUTION IN SOIL Soil samples from boring CPT-5 were collected at 105, 116, and 125 fbg to further assess the vertical extent of petroleum hydrocarbons in the soil in the vicinity of the suspected source area TPHg was detected at 116 fbg at a concentration of 9 6 parts per million (ppm) and was not detected in the 105 or 125 fbg samples Benzene was detected only in the 105 and 116 fbg soil samples at concentrations of 0 013 ppm and 0 064, respectively No fuel oxygenates or lead scavengers were detected in any of the soil samples from boring CPT-5 No gasoline constituents were detected in the soil sample from boring CPT-6 at 10 fbg 1399 3