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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN(;OUNTY r. , <br /> a: a <br /> JOGI KHANNA NLD.,M.P.H. <br /> Health Officer <br /> P.O. Box 2009 (1601 East Hazelton Avenue) • Stockton,California 95201 � <br /> (209) 468-3400 <br /> April 8 , 1991 <br /> Robert Mathias <br /> 17327 S. Van Allen <br /> Escalon, CA 95320 <br /> Re: Soil Suitability Study for MS-9"0 <br /> A soil suitability study was submitted by Walter Curtis in which <br /> test for chemical Dibromochloropropane (DBCP) was tested for and <br /> showed results of 2 . 06 ug/L (parts per 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. <br /> If your. private and/or agricultural well analysis for DBCP exceeded <br /> the State standard of 0 . 2 ppb, the following alternatives are being <br /> 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 /> in your phone directory yellow pages under "Water <br /> Filtration & Purification Equipment . " <br /> A Division of San Joaquin County Health Care Services C) <br />