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PUBLIC HEALTH SEKVICES <br />SAN JOAQUIN COUNTY <br />JOGI KHANNA M.D., M.P.H. <br />Health Officer <br />P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br />(209) 468-3400 <br />JAN 2 0 199 <br />Dear Property Owner, <br />San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) is providing <br />notification to you that groundwater in the area of Wilcox Road south of Waterloo Road has been impacted <br />with chlorinated hydrocarbons from an unidentified source, in excess of the State of California Drinking <br />Water Standards. The constituents detected from private well testing are the following: <br />1,1-Dichloroethane (DCA) <br />1,1-Dichloroethene (DCE) <br />PHS/EHD is overseeing the investigation of the former underground storage tank (UST) located at 4648 <br />Waterloo Road. During the course of groundwater monitoring, the above organic compounds unrelated to <br />the UST investigation, were detected in the public water supply well serving this property. PHS/EHD, with <br />the cooperation of the various neighboring residences and businesses, conducted a well survey identifying <br />private water sources within a specified geographical range and/or radius. Chlorinated hydrocarbons have <br />been identified in two private wells in the immediate area at 4716 E. Waterloo Road and 2817 Cherryland. <br />Although public water standards do not apply to private wells, you may wish to have your private well <br />tested, utilizing EPA Method 502, in order to be assured that the chemical compounds which have been <br />detected in the area of Wilcox Road south of Waterloo Road, have not impacted your well. Attached is a <br />list of California state certified laboratories that can perform the analysis. <br />If you choose to test your private well, PHS/EHD will provide interpretation of the analytical results. If you <br />have any questions, please contact Mary Meays, Senior REHS, of my staff at (209) 468-0337 or Diane <br />Hinson, Supervising FtEHS at (209) 468-3452. <br />Ernest M. Fujimoto, M.D. <br />Acting Health Officer <br />Donna Heran, R.E.H.S., Director <br />Environmental Health Division <br />c: Wendy Cohen, Central Valley Regional Water Quality Control Board <br />c: Mike Camy, California Water Services <br />c: California Department of Health Services, <br />Division of Drinking Water and Environmental Management <br />c: Laurie Cotulla, PHS/EHD <br />A Division of San Joaquin County Health Care Services