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rY i 1 <br /> ai <br /> CAMBRIA <br /> Depth to groundwater in the wells ranged from 34 60 to <br /> 36 97 fbg Blaine's well gauging data is included in <br /> Appendix C <br /> Soil Types Soil types encountered while drilling the borings generally <br /> consisted of clayey and sandy silt (ML) to approximately 12 to <br /> 18 fbg, underlain by sand (SW) or silty sand (SM) to <br /> approximately 17 to 205 fbg Underlain by silt (ML) to <br /> approximately 55 fbg In well boring MW-13, the silt is <br /> underlain by sand (SP) to the total explored depth of 84 fbg <br /> (Appendix B) <br /> Chemical Analyses Selected soil samples from well borings MW-12 and MW-13 <br /> and groundwater samples from wells MW-1 through MW-13 <br /> and VEW-2 were analyzed for TPHg, BTEX, MTBE, 1,2-DCA, <br /> and EDB by EPA Method 8260B Selected soil and <br /> groundwater samples from wells MW-12 and MW-13 were also <br /> analyzed for fuel oxygenates (di-isopropyl ether [DIPE], tertiary <br /> amyl methyl ether [TAME], ethyl tertiary butyl ether [ETBE], <br /> and tertiary butyl alcohol [TBA])by EPA Method 8260B <br /> Soil Disposal• Approximately 3 7 tons of soil were generated during field <br /> activities, temporarily stored onsite, covered with plastic <br /> sheeting, sampled, and profiled for disposal On March 4, 2004, <br /> Manley and Sons Trucking, Inc of Sacramento, California <br /> transported the soil to Allied Waste Industries' Forward Landfill <br /> in Manteca, California for disposal The soil disposal <br /> documentation is provided as Appendix D <br /> Well Materials. Well MW-12 was constructed using two-inch diameter Schedule <br /> 40 PVC casing and well MW-13 was constructed using four- <br /> inch diameter, Schedule 80 PVC casing with a screen slot size of <br /> 0 020-inch and 2112 Monterey sand <br /> Screened Interval: Well MW-12 is screened from 32 to 47 fbg, and MW-13 is <br /> screened from 75 to 80 fbg Monitoring well construction <br /> 0854 5 <br />