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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer • "moi Faa�': <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> COPY <br /> MICHAEL NILSSEN <br /> LIFE MEDICAL INDUSTRIES INC <br /> P O BOX 692170 <br /> STOCKTON CA 95269-2170 <br /> APR 12 1994 <br /> RE: 2060 E MAIN STREET SITE CODE: 2256 <br /> STOCKTON CA <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has received your letter dated March 28, 1994, <br /> which enclosed a letter report of two soil borings installed at <br /> the above noted facility in 1993 . PHS/EHD has completed a <br /> comprehensive review of the file and the data included in the <br /> letter report and has the following comments. <br /> PHS/EHD cannot use the data included in the letter report to <br /> evaluate the waste oil tank pit area, the current area of concern <br /> at this site, for the following reasons. <br /> The two soil borings were not installed in the area of the former <br /> waste oil tank pit area and therefore cannot be used to determine <br /> the full extent of the contamination in that area. In order to <br /> investigate the waste oil tank pit area, a soil boring(s) would <br /> need to be installed at or near the area where soil contamination <br /> has been previously documented. <br /> With regard to the former gasoline tanks apparently abandoned in <br /> place, the data gathered from the two soil borings installed near <br /> these tanks do not meet the current requirements for closure of <br /> underground storage tanks in place. Therefore, PHS/EHD cannot <br /> evaluate the data gathered from the two soil borings to determine <br /> if a release has occurred from these tanks. <br /> In order to properly close underground storage tanks in place by <br /> current standards, two or three soil samples from underneath each <br /> tank, depending on the size of the tank, is generally required. <br /> Usually, soil borings are installed by a drill rig at an angle so <br /> that the soil samples are actually obtained from beneath the <br /> tanks. PHS/EHD can evaluate this type of data to determine if a <br /> release has occurred from the tanks and whether closure status <br /> A Division of San Joaquin County Health Care Services <br />