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San Joaquin County <br /> oP°"'" ..� Environmental Health Department DIRECTOR <br /> �.• _,�< .p Donna Heran, REHS <br /> 600 East Main Street <br /> Q: PROGRAM COORDINATORS <br /> W Stockton, California 95202-3029 Robert McClellon, REHS <br /> .• Jeff Carruesco, RENS, RDI <br /> Kasey Foley,REHS <br /> CQtiFOR�\P Website: www.sjgov.org/ehd <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> January 15, 2010 <br /> Charles Starr <br /> 21301 North Mann Road <br /> Acampo, CA 95220 <br /> SUBJECT: DBCP in your Water Well for PA-08-00148(MS); <br /> located at 21301 North Mann Road, Acampo <br /> As part of the Site Approval water test results (per our condition B) were submitted by J R <br /> Squared Consulting, Inc in which a sample taken March 24, 2009, was tested for the chemical <br /> Dibromochloropropane (DBCP) and showed results of 1.0 ug/L (parts per billion) in your <br /> 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. As a temporary measure, it is recommended that bottled drinking water be used if this well <br /> is 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 <br /> prevent exposure through skin contact, bathing or inhalation. As a result, point of entry <br /> filters, which treat water for the entire house, are recommended because they remove all <br /> potential sources of exposure. The "granular activated carbon" filter is the recommended <br /> water treatment device in this case. It operates by passing the well water through a <br />