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H SERViCESPUBLIC DEALTP. ._ <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> M. D. M.P.H. Acting Health Officer <br /> Ernest M. Fujimoto, , <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 Stockton, CA 95201-0388 <br /> 2091468-3420 <br /> BOB MURDOCH OCT 111996 <br /> CITY OF STOCKTON <br /> 425 N EL DORADO ST <br /> STOCKTON CA 95202 I <br /> Site Code: 2399 <br /> Re: Fire Station #9 <br /> 550 East Harding Way, Stockton CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) has <br /> completed review of the "Site Characterization Work Plan" dated May 29, 1996 and prepared <br /> by The Twining Laboratories, Inc. PHSIEHD has the following comments for your <br /> consideration. <br /> The work pian proposed a series of push-point soil borings to investigate the vertical and <br /> horizontal extent of soil contamination and to assess possible impacts to groundwater. One <br /> soil boring, SP1, will be advanced to groundwater which is expected to be encountered at <br /> approximately 40 feet below ground surface (bgs). The proposal indicated that soil samples <br /> would be collected from each soil boring at four foot intervals beginning at 10 feet bgs. <br /> Please note that soil contamination was evidenced at 5 feet bgs and not at 12 feet bgs; <br /> therefore, PHS/EHD recommends that you begin collecting soil samples at 5 feet bgs rather <br /> than collecting the first soil sample at 10 feet bgs. The work plan stated that selected soil <br /> samples would undergo laboratory analysis. Please contact PHSIEHD to discuss the <br /> selection of soil samples which will undergo laboratory analysis, so that sufficient soil <br /> samples will undergo analysis to characterize the extent of soil contamination. <br /> Once PHSIEHD has received the appropriate permit fees, PHS/EHD will issue the drilling <br /> permit, and you may proceed with scheduling the proposed field work. Please contact <br /> PHSIEHD at least two working days prior to initiating field activities, so that PHSIEHD may <br /> schedule site inspections. <br /> If I can answer any questions or to schedule a site inspection, please do not hesitate to <br /> contact me at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Mary Meays, Sensor REHS Margaret agorio, REH� <br /> Site Mitigation Unit Supervisor <br /> MM/550HAR.WOR <br /> cc: Elizabeth Thayer, CVRWQCB cc: Ken Jones, Twinning <br /> A Division of San Joaquin Counh,Health Care Services <br /> 1 <br />