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Ms. Mary Raygoza <br /> October 8, 1990 <br /> i Page 3 <br /> i <br /> the presence of hydrocarbons. After overoxcavating until no evidence of <br /> A hydrocarbons is found in the soil, two soil samples from the floor of the <br /> excavation, and one from each wall, will be obtained for laboratory analysis <br /> to confirm that soil containing hydrocarbons has been removed. Soil samples <br /> will be analyzed j ed for TPHG TPHD and B <br /> Y TEX. <br /> ESE estimates that the overexcavation and sampling can be accomplished in <br /> I one day. k <br /> TASK 3 Report Preparation. ESE will prepare a report of the site assessment results. <br /> The report will include estimates of the vertical and lateral extent of <br /> hydrocarbons in the soil beneath the buildiing, and analytical results of the <br /> samples taken after overexcavating. Upon Delta's approval, a copy of the <br /> report will be submitted to the San Joaquin County Department of <br /> Environmental Health. <br /> It is anticipated that the above scope of work can be accomplished within 3 weeks of <br /> commencement of drilling. Laboratory analyses will takeapproximately one week and the <br /> report will take an additional week. Soil excavated will be stockpiled onsite, but separate <br /> from previously excavated soil. <br /> A Health & Safety Plan covering this scope, of work is beuig prepared and will be sent to <br /> you upon completion. <br /> Please call Paul Graff at (415) 372-3637 with any questions or comments regarding this <br /> Work Plan. <br /> Sincerely, <br /> ENVIRONMENTAL SCIENCE& ENGINEERING, INC. <br /> Paul K. Graff Susan S. Wickham, RG 3851 <br /> Senior Associate Geolo st Director of.Geosciences, <br /> Attachments: Figure 1 Site Plan <br /> cc: Darlene Reuss, San Joaquin County Public Health Services <br /> Gordon Boggs, Central Valley Regional Water Quality Control Board <br /> f:\projects\531-001\thomasyd.wpl <br /> f <br />