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ENVIRONMENTAL HEALTH DEPARTMENT �.• �P-PU SAN JOAQUIN COUNTY _.,,��'•.oG Unit Supervisors Donna K.Heran,R.E.H.S. 304 Borgman,R.E.H.S. 304 East Weber Avenue, Third Floor Director Mike Huggins,R.E.H.S..R.D.I. Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. • ogCiFORa�P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E_H.S. Laurie A.Cotulla,R.E.H.S. Far: (209) 464-0138 Robert McClellon,R.E.H.S. Program Manager Mark Barcellos,R.E.H.S. November 7, 2003 VFW Post 1051 FiLE C P.O. Box 604 Ripon, CA 95366 RE: DBCP in your Water Well for Site Approval PA-02-625 As part of the Site Approval process, water test results (per our condition B) were submitted by Quartaroli and Associates, Incorporated in which a sample taken July 3, 2003, was tested for the chemical Dibromochloropropane (DBCP) and showed results of 0.22 ug/L (parts per billion) in your domestic well at 12455 E. West Ripon Road, Ripon, California. The State Department of Health Services adopted a standard of 0.2 parts per billion(ppb) for DBCP in public drinking water systems in 1989; howe,,er, private well owners are not legally required to meet this standard. As a precaution for yourself, members and guests, the Environmental Health Department would suggest that you have your domestic well tested annually to verify if the above-described chemical continues to be above state drinking standards. If your private well analysis for Dibromochloropropane exceeded the State standard of 0.2 ppb, the following alternatives are being provided for your guidance: 1. As a temporary measure, it is recommended that bottled drinking water be used if this well is supplying drinking water. 2. In cases where exposure may continue indefinitely, such as with contaminated private wells, installation of a water treatment device, such as a filter, may be advisable. However, using bottled water or installing a water treatment device at the kitchen water tap, will not stop exposure to DBCP if it is in your private water supply. Most treatment units sold for home installation only treat water at the point of use, such as the kitchen faucet, and do not prevent exposure through skin contact, bathing or inhalation. As a result, point of entry filters, which treat water for the entire house, are recommended because they remove all potential sources of exposure. The "granular activated carbon' filter is the recommended water treatment device in this case. It operates by passing the well water through a charcoal bed, thereby absorbing the DBCP contaminant. Water treatment equipment suppliers and installers are listed in your phone directory yellow pages under"Water Filtration & Purification Equipment."