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PUBLIC kEALTH <br /> "SER CES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor * R O. Box 388 Stockton, CA 9520 03$ , , <br /> 209/468-3420 <br /> BOB BENNETT MAILED NOV 091995 <br /> "TRI VALLEY GROWERS ASSOCIATION <br /> ENVIRONMENTAL SERVICES <br /> t <br /> iP O BOX 1211 <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 <br /> review of the "Request for Boring Permit" work plan dated September 13, 1995 and prepared by Tri-Valley <br /> Growers. PHS/EHD has the following comments for your consideration. <br /> The work plan indicated that purpose of the investigation was to determine the extent of residual soil <br /> contamination between SB1 and 587 in the area of the former tank excavation, and the physical and 1 <br /> chemical characteristics of soil which relate to the movement of water and contaminants. <br /> The work plan proposed to drill and sample three soil borings and to collect grab groundwater samples at <br /> the capillary fringe and at the total depth of 20 feet. Please note that it may be necessary to drill and <br /> � <br /> sample deeper than the 20 feet proposed, in order to determine the extent of vertical migration of the ¢ <br /> contamination. <br /> Your indication that the contamination observed during sampling of 561 occurred due to a plumbing spill <br /> at the time of tank removal, may not have taken into consideration the contamination evidenced during <br /> the sampling of HAI and HA2. Also, please note that the maximum depth of HAI and HA2 was 15 feet <br /> and that it is likely that the contamination extended to a greater vertical depth based on the concentrations <br /> detected. Therefore, it is also necessary that an additional soil boring be placed between 581 and HA3 <br /> and drilled to a depth greater than 15 feet. <br /> Please submit in addendum your response to PHS/EHD comments. If you have any questions, please <br /> 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: Seacor Environmental, 1734 34th Street Sacramento CA <br /> A Division of San Joaquin County Health Care Services <br /> A <br />