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PUBLIC "'HEALTH SERVfCES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 +Foe <br /> (209) 468-3420 <br /> DAVID ATWATER <br /> PACIFIC PRIDE <br /> COMMERCIAL FUELING <br /> PO BOX 1207 AUG <br /> STOCKTON CA 95201 2� X99` <br /> Re: California Fuels Station Site Code: 1214 <br /> 2402 Pacific Avenue <br /> Stockton CA 95204 <br /> San Joaquin County Public Health Services, Environmental Health Division has completed <br /> review of information pertaining to the above mentioned site including the work plan and <br /> amendment which were submitted in 1992. PHS/EHD has prepared the following comments <br /> for your consideration. <br /> Three 10,000 gallon underground storage tanks have been in operation at the site for <br /> approximately 20 years. In order to assess the possibility of contamination, a soil vapor <br /> survey was conducted on June 26, 1989 consisting of 22 soil vapor probes. The probes were <br /> located around the tanks and the perimeter of the property and detected significant levels of <br /> petroleum hydrocarbon vapors. up to 170 ppm at 3 feet below ground surface. The <br /> consultant, Staal, Gardner & Dunne, suggested in correspondence dated August 15, 1989 <br /> which was received on August 8, 1991, that the elevated levels may have been related to a <br /> deteriorated product line which had been replaced some time in the past. The consultant <br /> further indicated that the tanks should be upgraded or replaced and that additional <br /> investigation would be warranted. <br /> A work plan dated August 18, 1992 was submitted on August 21, 1992 by Michael Bonkowki <br /> which proposed to drill three soil borings that would be converted into monitoring wells. The <br /> soil borings were located in the area of the operating tanks and dispenser island. PHS/EHD <br /> requested alternative lead analysis and provided information regarding nearby sites' gradient <br /> directions. A work plan amendment, dated November 3, 1992 was submitted, which revised <br /> the work plan to address PHS/EHD concerns. <br /> The work plan and amendment is proposed to initiate the additional soil and groundwater <br /> investigation which is required under Article 11 of the California Code of Regulations, Title <br /> 23, Division 3, Chapter 16, Underground Storage Tank Regulations. Additional soil and/or <br /> groundwater investigation may be required to determine the full extent of the petroleum <br /> hydrocarbon contamination. Please consider including in this phase of investigation shallow <br /> soil borings to further investigate soil contamination which has been evidenced to the north of <br /> the tank area and to the south of the dispenser area. <br /> A Dkj,inn or San Joaquin Cnunty Health Care Service. <br />