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1 <br /> 16 analytical results for soil samples are summarized in Table 1 Laboratory data sheets and chain- <br /> of-custody documentation are included in Appendix II <br /> 2.3 Vapor Well Construction <br /> 1 Due to apparent elevated hydrocarbon concentrations noted during drilling activities (odor, soil <br /> discoloration, and elevated FID readings), soil borings SBI and SB3 were completed as vapor <br /> wells VW1 and VW2 Hydrocarbon contamination was noted in these borings at depths ranging <br /> from approximately 10 to 35 feet below the ground surface <br /> Both wells were constructed with 2-inch PVC casing The screened interval of VW 1 is <br /> positioned from approximately 10 feet bgs to 30 feet bgs The screened interval of VW2 is <br /> ' positioned from approximately 20 feet bgs to 35 feet bgs The screen slot size in each well is <br /> 0 020-inch Well construction details are depicted on the well logs (Appendix III) <br /> 2_4 Groundwater Monitoring Well Construction <br /> Soil borings SB2, SB4, and SB5 were subsequently completed as groundwater monitoring wells <br /> ' MWI, MW2, and MW3 to assess potential groundwater contamination beneath the site, and to <br /> provide measurement points for the determination of groundwater flow direction and hydraulic <br /> gradient <br /> lob <br /> Each well was constructed with 2-inch PVC casing The screened interval of each well was <br /> positioned from approximately 5 feet above to 15 feet below the encountered water table to allow <br /> for seasonal water level fluctuations The screen slot size is 0 020-inch Well construction details <br /> are depicted on the well logs (Appendix III) <br /> 22.5 Monitoring Well Development <br /> Newly installed groundwater monitoring wells MW 1, MW2, and MW3 were developed on July 3, <br /> 1997 Each well was purged until the extracted water was relatively sediment free <br /> Development/purge logs are included in Appendix IV Purgewater was stored onsite in 55-gallon <br /> drums pending disposal <br /> 2_6 Fluid Level Measurement/Surveying <br /> After fluid levels had been allowed to stabilize, groundwater levels were obtained from wells <br /> MW1, MW2, and MW3, and from an existing groundwater monitoring well located onsite This <br /> well was installed by the owner of the adjacent Canepa's Car Wash site This additional on-site <br /> well will be designated CW Fluid levels were taken on July 3, 1997 utilizing an electronic water <br /> F probe capable of measui ing with an accuracy of 1/100 of a foot Wellheads were surveyed on <br /> w\977311repoM\psj doc 3 <br /> • <br />