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M. Scott Mansholt <br /> • - 3 - 27 October 2005 <br /> Chevron Environmental <br /> Mountain House#3 <br /> closely evaluated by the laboratory to confirm that the TPHg values reported are gasoline, or if <br /> the results may be interference caused by elevated TPH crude oil in soil or groundwater. <br /> We concur with the plan to install additional borings and collect samples for analysis to delineate the <br /> extent of soil and groundwater impacts provided our comments outlined above are addressed. <br /> By 15 November 2005, please submit your plan and time schedule for conducting the scope of work <br /> described in the workplan. Please notify Regional Board staff at least 48 hours prior to commencing the <br /> field investigation and drilling activities. <br /> If you have any questions or comments, please contact Dean Hubbard at (559) 445-5179. <br /> SHELTON R. GRAY C. DEAN HUBBARD <br /> Senior.Engineering Geologist Engineering Geologist <br /> PG No. 6357 <br /> cc: Mike Infurna, San Joaquin County Public Health Services, Stockton <br /> Luis Mercado, SAIL, Sacramento <br />