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lI <br /> 1 <br /> SUMMARY OF WORK <br /> 500 Gallon Gasoline UST & Concrete Fuel Vault <br /> Former Lockeford Winery <br /> Lockeford, California <br /> The following describes the prior and additionally proposed activities at the <br /> former Lockeford Winery, located at 12470 Locke Road, Lockeford, California. <br /> Included below is a brief site background, an overview of the work to be <br /> performed'and specific descriptions of these activities. <br /> 1.0 500 Gallon Underground Storage Tank <br /> 1..1 Background <br /> On August 20, 1999 a 500 gallon underground storage tank was removed and <br /> E transported off-site under manifest for disposal. The UST was a single wall steel <br />� s <br /> tank and formerly contained gasoline. The UST was last used in the late 1980's <br /> and was dry and empty. After removal, a backhoe was used to collect a soil <br /> sample at a depth of two feet below the invert of the UST (approximately 8 feet <br /> below ground surface). A four-in-one composite sample was also collected from <br /> I the soil stockpile. The sample taken from below the UST contained 690 ppm <br /> TPH gasoline. Please see attached Sample Result Summary. <br /> Based on the soil conditions, sample results and visual inspection of the <br /> excavation it is anticipated at this time that a minimal amount of contaminated <br /> soil will need to be removed from the excavation to obtain closure of the site. <br /> Therefore, this investigation is concerned with determining the vertical and ; <br /> lateral extent of the contamination as well as the concurrent removal of the j <br /> contaminated soils. <br /> 1 of 3 <br /> 's <br /> it <br />