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PUBLIC HEALTH SERVICES <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 /> December 30, 1991 <br /> E. Franceschetti <br /> 17266 S . Steingul Rd. <br /> Escalon, CA 95320 <br /> Re: DBCP in your Water Wells <br /> A soil suitability study was submitted by Walter Curtis, in which <br /> a test for the chemical Dibromochloropropane (DBCP) was tested for <br /> and showed results in the homesite well . 03 ug/1 (parts per <br /> billion) and the agriculture well showed . 019 ug/l (parts per <br /> billion) . <br /> The State Department of Health Services adopted a standard of 0 .2 <br /> parts per billion (ppb) for DBCP in public drinking water systems <br /> in 1989 , however, private well owners are not legally required to <br /> meet this standard. As a precaution for yourself and family, we <br /> would suggest that you have the domestic well tested annually to <br /> verify if the above decribed chemical raises above state drinking <br /> standards . <br /> If your private and/or agricultural well analysis for <br /> Dibromochloropropane (DBCP) exceeded the State standard of 0 . 2 ppb, <br /> the following alternatives are t)eing provided for your guidance: <br /> 1 . As a temporary measure, it is recommended that bottled <br /> drinking water to be used. <br /> 2 . In cases where exposure may continue indefinitely, such <br /> as with contaminated private wells, installation of a <br /> water treatment device, such as a carbon filter, may be <br /> advisable. However, using bottled water or installing a <br /> water treatment device at the kitchen water tap, will not <br /> stop exposure to DBCP if it is in your private water <br /> supply. Most treatment units sold for home installation <br /> only treat water at the point of use, such as the kitchen <br /> faucet, and do not prevent exposure through skin contact, <br /> bathing or 'inhalation. As a result, point of entry <br /> filters, which treat water for the entire house, are <br /> recommended because they remove all potential sources of <br /> exposure . The "granular activated carbon" filter is the <br /> recommended water treatment device in this case. It <br /> operates by passing the well water through a charcoal <br /> bed, thereby absorbing the DBCP contaminant . Water <br /> treatment equipment suppliers and installers are listed <br /> A Division of San Joaquin County l lcalth(:are Scrviccs <br />