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These activities represent an attempt to facilitate possible in situ soil <br /> remediation. They will be performed at this time as part of ongoing <br /> construction operations at the site and do not preclude the possibility of <br /> eventually choosing a different method of soil remediation. BP intends to <br /> follow these activities with a test to determine whether soil vapor collection <br /> will be feasible. <br /> _.. 2.4 MOTOR OIL EXCAVATION <br /> Eight soil samples were taken from within native material at the bottom of the <br /> former used and motor oil UST excavation (Table I). A single organic compound <br /> was detected in one of these samples: 29 ppm of an unknown measured as TPH-0. <br /> Groundwater samples collected and analyzed from MW-4, installed immediately <br /> - adjacent to this area of the used oil pit during the preliminary assessment in <br /> mid-1990, showed no detectable concentrations of hydrocarbons. Given that the <br /> concentrations of hyd.- carbons in the former tank excavation are low level and <br /> very restricted, and as no groundwater appears to have been impacted, it is <br /> recommended that this area be filled as quickly as possible. The monitoring <br /> well installation program outlined in Section 2.1 of this report will provide <br /> for the continued control of groundwater quality irr the vicinity of the filled <br /> used oil pit. <br /> 2.5 REPORTING <br /> = This work will result in a report describing all work performed and presenting <br /> - results of that work. It will include: <br /> Boring logs. <br /> • Groundwater map showing flow depth, direction, <br /> and analytical test results. <br /> • Distribution of hydrocarbons in soils. <br /> • A summary of site hydrogeology. <br /> r <br /> 5 ,. <br /> _A:ENG:9205J031291 <br /> c�• <br />