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stockpiled soil. <br /> - The excavation was backfilled using sos.l excavated from a <br /> shallow pit at the west end of the site. <br /> ry, This preliminary report and workplan preparation was <br /> authorized on August 2, 1990, in accordance with our scope of <br /> services dated July 26, 1990 and contract dated August 9, 1990. <br /> II. SCOPE AND PURPOSE OP INVESTIGATION <br /> The purpose of this investigation has been to assist <br /> Gillies T--uckinrj Co. (GTC) to assemble and review information <br /> gathered in conjunction with the removal and disposal of <br /> underground fuel storage tanks (USTs) at a truck terminal <br /> located at 3931 Newton Road in Stockton, California. This <br /> report is intended to fulfill San Joaquin County's need for a <br /> report which consolidates the information gathered to date and <br /> - presents an approach to further characterize the soil and <br /> groundwater at the site. According to their terminology, this <br /> is the document which meets the requirements of the "Soil <br /> Contamination Workplan". Once the soil contamination is <br /> defined, a "Soil Remediation Proposal" will be prepared, if <br /> necessary. <br /> Richesin & Associates, Inc. did not participate in the <br /> performance of construction activities related to tank removal <br /> or soil excavations, or the collection, sampling and analysis of <br /> soils from the tank excavation or stockpile. Laboratory <br /> analyses were apparently requested by SEMCO, the contractor to <br /> - Gillies Trucking Co. , during the first tank removal phase in <br /> 1989 and during additional excavations in 1990. <br /> our current scope of work has consisted of: <br /> Task 1 - Prepare Report of Removal and Excavation <br /> Efforts Performed to Date <br /> Task 2 - Prepare Work Plan and Complete Permitting <br /> for Additional Field Investigations <br /> Tasks 1 and all but thi permit preparation part of Task 2 have <br /> been essentially completed at this time. Once the work plan is <br /> approved, the field study permit applications and well permit <br /> will be filed with the County. Task 3, referred to in our July <br /> 26, 1990 proposal - Subsurface investigations - will be <br /> commenced only after approved by Gillies Trucking Co. <br /> --- <br /> ----------- _-`- <br /> ----------------Additional evaluations ----and- -assess�ents- related- -tom soil <br /> remediation alternatives and planning.have been performed by RAI <br /> in accordance with your requests. <br /> 2 <br />