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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer y. <br /> 304 E.Weber Ave., 3rd Floor • P. O. Box 388 • Stockton, CA 95201-0388 . <br /> 209/468-3420 q�i F o•R NSP <br /> September 5, 1995 <br /> D. & S. Simpson <br /> 14206 North Vintage Road <br /> Lodi, CA 95240 <br /> Re: DBCP in your Water Wells/MS-92-145, 14205 N. Vintage Road, Lodi <br /> A soil suitability study was submitted by R. & S. Miller &Associates, in which a test for the <br /> chemical Dibromochloropropane (DBCP) was tested for and showed results of 2-2 u <br /> (parts per billion) in your irris;ation well. g/L <br /> The State Department of Health Services adopted a standard of 0.2 parts per billion (ppb) <br /> for DBCP in public drinking water systems in 1989, however, private well owners are not <br /> legally required to meet this standard. As a precaution for yourself and family, we would <br /> suggest that you have the domestic well tested annually to verify if the above described <br /> chemical raises above state drinking standards. <br /> If your private and/or agricultural well analysis for Dibromochloropropane (DBCP)exceeded <br /> the State standard of 0.2 ppb, the following alternatives are being provided for your <br /> guidance: <br /> 1. As a temporary measure, it is recommended that bottled dri iking water to be <br /> used. <br /> 2• In cases where exposure may continue indefinitely, such as with contaminated <br /> private wells, installation of a water treatment device such as a carbon filter, <br /> may be advisable. However, using bottled water or installing a water <br /> treatment device at the kitchen water tap, will not stop exposure to DBCP if <br /> it is in your private water supply. Most treatment units sold for home <br /> installation only treat water at the point of use, such as the kitchen faucet, and <br /> do not prevent exposure through skin contact, bathing or inhalation. As a <br /> result, point of entry filters, which treat water for the entire house, are <br /> recommended because they remove all potential sources of exposure. The <br /> ",ranular activated carbon" filter is the recommended water treatment device <br /> in this case. It operates by passing the well water through a charcoal bed, <br /> thereby absorbing the DBCP contaminant. Water treatment equipment <br /> suppliers and installers are listed in your phone directory yellow pages under <br /> "Water Filtration & Purification Equipment." <br /> A Division of San Joaquin County Health Care Services <br />