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of soil contamination and to provide access for site remediation Boring B5 was installed <br /> adjacent to the northern end of the eastern pump island to determine if these soils-contained <br /> hydrocarbons All drilling was performed using a hollow stem auger drill ng Drilling <br /> procedures are presented in Appendix C <br /> The groundwater monitoring wells were installed to 90 feet bgs and are constructed of 2-inch <br /> diameter PVC Wells MW3R, MW4, and MW6 were screened from total depth to <br /> �o <br /> approximately 65 feet bgs Well MW5 was screened from total depth to 20 feet bgs to allow <br /> access for future remediation of the sediments in this area which showed obvious signs of <br /> hydrocarbon impacts Vadose wells VW1 and VW2 were installed to 50 feet below grade with <br /> 2-inch diameter PVC and were screened from total depth to 15 feet below grade The filter pack <br /> for each well consisted of#3 Monterey sand The wells were sealed with approximately 2 feet <br /> of bentonite pellets on top of the sand pack and were grouted from the top of the seal to the <br /> surface with neat cement using the tremmie method Each well is covered with a traffic-rated <br /> vault and sealed with a watertight locking cap Further details on drilling and well construction <br /> rprocedures are presented in Appendix C The permits for well installation from the PHS/EHD <br /> are included as Appendix B Further details on well construction specifications are presented <br /> in the drilling logs <br /> SOEL ANALYSES <br /> During drilling of each borehole, soil samples were collected at five-foot intervals for geologic <br /> logging and laboratory analysis Soil samples were screened in the field for hydrocarbon <br /> emissions using an organic vapor analyzer (OVA), however, the OVA was not functional for <br /> every borehole, as indicated in the logs Based on the OVA readings and visual/olfactory <br /> observations, 51 soil samples were selected for laboratory analysis of TPH and BTEX by EPA <br /> method 8015/8020 The samples were analyzed by American Analytics of Chatsworth, <br /> California, a state certified laboratory. Procedures used for soil sampling are presented in <br /> Appendix C <br /> Page 4 <br />