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�i <br /> PUBLIC`iEALTH, SER ti CES <br /> SAN JOAQUIN COUNTY a•F ` `:"oma <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer .- P <br /> 445 N. San Joaquin Street • P.O. Box 388 •Stockton, CA 95201-0388 9�fKoa��. <br /> (209) 468-3420 <br /> t <br /> .; <br /> f5 <br /> JOHN WEBER <br /> C M WEBER ENTERPRISES INC <br /> 3757 COLLEGE AVE F , �,_Vlye <br /> SACRAMENTO CA 95818 I�tv <br /> RE: Weber Point <br /> SITE CODE: 2436 <br /> 141 North EI Dorado Ave <br /> Stockton CA 95202 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has completed <br /> review of Fugro's September 14, 1994 request to initiate air diffusion into groundwater wells MW4, RW1, <br /> and RW2. PHS/EHD has the following comments for your consideration. - <br /> PHS/EHD concurs with Fugro's recommendation to initiate air diffusion into RW1 and RW2. The <br /> migration of dissolved oxygen appears to be contained on site as indicated by dissolved oxygen <br /> monitoring. Furthermore, based on results of the recent groundwater sampling event, August 16, 1994, <br /> the contamination does not appear to be migrating off site. <br /> PHS/EHD does not concur with Fugro's recommendation to initiate air diffusion into MW4 at this time. In <br /> order to monitor migrational patterns, a downgradient well :is required to confirm that contaminants are not <br /> migrating offsite. Monitoring well, MW4, which is in the'aowngradient location, will provide background <br /> information necessary to verify that the contamination is not migrating offsite. <br /> Please be informed that dissolved oxygen levels in the wells should be measured weekly for at least one ll <br /> month after initiating air diffusion into RW1 and RW2 and the information provided to PHS/EHD. <br /> If you have any questions, comments or wish to schedule a site inspection, please contact Mary Meays at <br /> (209) 468-0337. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> Mary Meays, Senior REHS Diane .: Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> } <br /> MM/141 ELDO <br /> c: Elizabeth Thayer, CVRWQCB <br /> c: Dan Kirk, Shell Oil <br /> c: Jeanne Zolezzi, Neumiiler and Beardslee <br /> c: Paul Graff, Aegis Environmental <br /> g 4�. <br /> - L <br /> A Di%ision or San Joatiuin CrnHnhHealth Care Service. f <br />