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PUBLIC HEALTH SERVICES Ca <br /> SAN JOAQUIN COUNTY =` <br /> JOGI KHANNA M D.,M.P.H. A <br /> Health Officer P <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br /> c4Foa`'• <br /> (209) 468-3400 <br /> February 9, 1993 00 r— y <br /> Mr Thomas Fredriks <br /> 23203 S. Austin Road <br /> Ripon, CA 95366 <br /> Re: DBCP in your Water Wells (MS-92-0154, 18877 S. Austin Road, Ripon) <br /> A soil suitability study was submitted by Quality Control Inspection, in which a test for the <br /> chemical Dibromochloropropane (DBCP) was tested for and showed results of 0.32 ug/L (parts <br /> per billion) in your domestic well. <br /> The State Department of Health Services adopted a standard of 0.2 parts per billion (ppb) for <br /> DBCP in public drinking water systems in 1989, however, private well owners are not legally <br /> required to meet this standard. As a precaution for yourself and family, we would suggest that <br /> you have the domestic well tested annually to verify if the above decribed chemical raises above <br /> 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 guidance: <br /> 1. As a temporary measure, it is recommended that bottled drinking 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 treatment <br /> device at the kitchen water tap, will not stop exposure to DBCP if it is in your <br /> private water supply. Most treatment units sold for home installation only treat <br /> water at the point of use, such as the kitchen faucet, and do not prevent exposure <br /> through skin contact, bathing or inhalation. As a result, point of entry filters, <br /> which treat water for the entire house, are recommended because they remove all <br /> potential sources of exposure. The "agranular activated carbon" filter is the <br /> recommended water treatment device in this case. It operates by passing the well <br /> water through a charcoal bed, thereby absorbing the DBCP contaminant. Water <br /> treatment equipment suppliers and installers are listed in your phone directory <br /> yellow pages under "Water Filtration & Purification Equipment." <br /> 3. A replacement well is also an alternative for providing uncontaminated water. <br /> A Division of fan Joaquin County Health CArc scrv,ccs C t <br />