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PUBLIC; HEALTH SERVICES <br /> OPQ•ui?y c <br /> SAN JOAQUIN COUNTY Q y� <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D.; M.P.H., Acting Health Officer p.. <br /> 445 N. San Joaquin Street • P. 4. Box 388 • Stockton, CA 95.201-0388 <br /> 209/468-3420 <br /> CHRIS SAVAGE <br /> TRI VALLEY GROWERS ASSOCIATION <br /> ENVIRONMENTAL SERVICES <br /> P O BOX 1211 - 091994 <br /> MODESTO CA 95353 <br /> Re: Plant T: 26200 North Galt Road (Nowell Road) Site Code: 1920 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has completed review of <br /> the "Work Plan for Defining Lateral Extent of Soil and Groundwater Contamination" which was received on <br /> October 14, 1994 and prepared by RAH Environmental. PHS/EHD has the following comments for your ; <br /> consideration. <br /> The work plan proposed a minimum of five soil borings to be drilled and sampled at 5 foot intervals. One <br /> boring will be located off site on the property to the north of the former tank pit and if contamination is noted <br /> during drilling, additional soil borings will be drilled to define the lateral and horizontal extent of the off site i <br /> contamination. The remaining soil borings will be drilled on site to define the lateral and horizontal extent of <br /> the on site contamination. <br /> The work plan indicated that four soil samples from each soil boring would undergo laboratory analysis for <br /> TPH-gas using EPA Method 5030 and BTEX using EPA Method 8020. Please be informed that EPA 5030 is a I <br /> preparation method, purge and trap, and is required for BTEX and TPH-gas analysis. Furthermore, the detection <br /> method required for BTEX is EPA 8020 which utilizes gas chromatography. Please also include analysis for <br /> TPH-gas/diesel/motor oil since all three forms of TPH have been detected on the site. <br /> j <br /> Since the soil borings will be drilled on two parcels, two drilling permits will be necessary. Upon issuance of <br /> the necessary permits, field work may be scheduled. Please provide at least 48 hours notice prior to initiating <br /> field activities, so that PHS/EHD can schedule an inspection of the soil sampling and grouting activities. <br /> If you have any questions or comments, please contact.Mary Meays at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Mary Meays, Senior REHS Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> MM126200NG <br /> cc: Elizabeth Thayer,CVRWQCB <br /> cc: Juan Quijano, Tri-Valley <br /> cc: Raymond Henry, Jr., RAH Environmental <br /> A Division of San Joaquin County Health Care Services <br />