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PUBLIC HEALTH SERVIc°`t <br /> SAN JOAQUIN COUNTY I �.. <br /> ENVIRONMENTAL HEALTH DIVISION c P <br /> Karen Furst, M.D., <br /> M.P.H., Health Officer 4 iF'p RN <br /> Floor • Stockton, CA 95202 <br /> 304 East Weber Avenue, <br /> Thi68rd <br /> June 18,2001 MC COM <br /> Mary Slikker <br /> 14222 East Louise Avenue <br /> Ripon, California 95366 <br /> RE: DBCP in your Water Well <br /> A Soil Suitability Study was submitted by Zachary Wong of Wong Engineers,Incorporate. A <br /> test for the chemical Dibromochloropropane (DBCP) was tested for and showed results of .21 <br /> ug/L(parts per billion) in your domestic well at 14222 East Louise Avenue. <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 your domestic well tested annually to verify if the above-described chemical raises <br /> above state drinking standards. <br /> I <br /> If your private and/or agricultural well analysis for Dibromochloropropane exceeded the State <br /> 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 be used if this well is <br /> supplying drinking water. <br /> 2. In cases where exposure may continue indefinitely, such as with contaminated private wells, <br /> installation of a water treatment device, such as a filter, may be advisable. However, using <br /> bottled water or installing a water treatment device at the kitchen water tap, will not stop <br /> exposure to DBCP if 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 do not prevent <br /> exposure through skin contact, bathing or inhalation. As a result, point of entry filters, which <br /> treat water for the entire house, are recommended because they remove all potential sources <br /> of exposure. The "granular activated carbon" filter is the recommended water treatment <br /> device in this case. It operates by passing the well water through a charcoal bed, thereby <br /> absorbing the DBCP contaminant. Water treatment equipment suppliers and installers are <br /> listed in your phone directory yellow pages under "Water Filtration & Purification <br /> Equipment." <br /> A Division of San Joaquin County Health Care Services <br />