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f <br /> 5 <br /> File No. 2070-2 <br /> 19 September 1988 <br /> Rainbo Bakery, Stockton <br /> WORKPLAN FOR CONTAMINATION INVESTIGATION <br /> Anderson Geotechnical Consultants <br /> September 1988 <br /> I. INTRODUCTION <br /> I. Anderson Geotechnical Consultants has been retained by <br /> Anheuser-Bus,71; to complete the investigation of soil and <br /> groundwater contamination at the Rainbo Bakery, located at 2651 <br /> South Airport- Way in Stockton, California. The contamination <br /> stems from a gasoline leak in one or both of two underground <br /> tanks located on the subject site (which have been removed) . The <br /> Purpose of the additional investigation discussed herein is to <br /> address the concerns of Mr. Gordon Lee Boggs, of the California <br /> Regional Water Quality Control Board (see below, section III) , <br /> i <br /> II. HIS'T'ORY <br /> 2. Paragraphs :3-6 are based on the Contamination Assessment <br /> Report for the subject site prepared by Environmental Science and <br /> Engineering, Inc. (ESE report I,To. J-87-913-0100-1730, December <br /> 1987) . <br /> 3. The two underground gasoline storage tanks were located <br /> approximately 50 feet south of the baking facility's main <br /> building (see Site Plan - Figure 1) . The west tank was operable <br /> through 1986. The east tank was decommissioned (date unknown) , <br /> filled with sand, and remained underground. In december of 1986", <br /> precision tests indicated a possible leak it the west tank. <br /> Based on inventory records, the volume of gasoline which escaped <br /> was suspected to be small. <br /> 4. ..; The soil nearby the tanks was subsequently sampled and <br /> chemically analyzed, Results of the analyses showed elevated <br /> levels of miscellanecas hydrocarbons beneath beth tanks (to . a <br /> depth of 28 feet) . The' tanks were subsequently emptied, removed, <br /> and scrapped off-site, Contaminated soil surrounding the tanks <br /> was also removed. The resulting excavation was backfilled with <br /> clean, crushed rock and paved with asphalt. <br /> r 11� <br />