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A I <br /> At <br /> ENVIRONMENTAL HEALTH-DEPARTMENT <br /> u`" SAN JOAQUIN COUNTY <br /> ' oG <br /> unit Supervisors <br /> c a Donna K.Heran,R.E.H.S. Carl 13or man R.E.H.S. <br /> N X Director 304 East Weber Avenue, Third Floor g <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Douglas W.Wilson,R.E.H.S. <br /> e aN�P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> QLi FOR Laurie A.Cotulla,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H. <br /> S g Mark Barcellos,R.E.H.S.. <br /> I` <br /> June 16, 2005 <br /> FILE COPY <br /> Joe Silva <br /> 23480 N. Jack Tone Rd. <br /> Acampo, CA 95220 <br /> RE: DBCP in your Water Well at 23480 North Jack Tone Road,Acampo <br /> For Minor Subdivision PA-0400301 <br /> As part of the Minor Subdivision Approval(per our condition C), a Soil Suitability Study was <br /> submitted by Neil O. Anderson and Associated, Inc., in which a test for the chemical <br /> Dibromochloropropane (DBCP) was tested and showed results of.228 uglL(parts per billion) in <br /> your domestic well at the above referenced address. <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 rises <br /> above state drinking standards. <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. Asa 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 /> 4 <br />