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f" <br /> Ms. Lori Duncan <br /> June 15, 1999 <br /> Page 3 <br /> The evaluation of available soil analytical data indicates that a total of 737 pounds of <br /> hydrocarbon mass exists beneath the site. Residual TPH-as-diesel exists primarilybelow the <br /> current groundwater surface at low to moderate concentrations. Approximately 96% of the <br /> existing mass is located within an 800 sf area in the vicinity of the former USTs. <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 EO GEp�o <br /> � � R• R ci <br /> h Ramage, R.G. <br /> Josep g , * N0. 5856tik <br /> Project Geologist up. i 30e,p <br /> OF <br /> Enclosures <br /> CC: Mr. Bob McMillen—San Joaquin County Facilities Management Department <br /> f <br /> f <br /> E <br /> t <br /> t <br />{ <br /> h <br /> 4 <br /> f <br />