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Ms.Lori Duncan <br /> July 8, 19.99 <br /> page 3 <br /> The evaluation of available soil analytical data indicates that a total of approximately 813 pounds <br /> of hydrocarbon mass exists beneath the site. Residual TPH-as-diesel exists primarily below the <br /> current groundwater surface at low to moderate concentrations. Approximately 85% of the <br /> existing mass is located within a 736 sf area in the vicinity of the former USTs. i <br /> Thank you for your review of these hydrocarbon mass calculations and overall assistance on this <br /> project..'If you have questions'or need any additional information, please call me at(916) 354- <br /> 3250. <br /> Sincerely, <br /> RAMAGE ENVIRONMENTAL <br /> Joseph Ramage, R.G. <br /> Project Geologist gip; �{ a V100 <br /> Enclosures' <br /> CC: Mr. Bob McMillen—San Joaquin County Facilities Management Department <br /> 5 <br /> _ t <br /> . r <br /> F <br /> i <br />