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PUBLIC HEALTH SERVICES Ul/V <br /> SAN JOAQUIN COUNTY r. <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P. O. Box 388 • Stockton, CA 95201-0388 4-iF6*1k <br /> 209/468-3420 <br /> May 1, 1995 <br /> Mr. Kevin Huber <br /> Grupe Operating Company <br /> 3255 West March Lane, 4th Floor <br /> Stockton, CA 95219 <br /> Re: DBCP in your Water Wells/MS-95-4 <br /> (5111 West Sargent Road, Lodi) <br /> A soil suitability study was submitted by Kleinfelder for Grupe Operating Company, in which <br /> a test of well water for the chemical Dibromochloropropane (DBCP) was submitted and showed <br /> results of 0.56 ug/L (parts per billion) in your irrigation well on Parcel #3. <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 the domestic well tested annually to verify if the above described chemical raises above <br /> state drinking standards. <br /> If your private and/or agricultural well analysis for Dibromochloropropane (DBCP) exceeded <br /> the State 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 to be <br /> used. <br /> 2. In cases where exposure may continue indefinitely, such as with contaminated <br /> private wells, installation of a water treatment device, such as a carbon filter, <br /> may be advisable. However, using bottled water or installing a water treatment <br /> device at the kitchen water tap, will not stop exposure to DBCP if it is in your <br /> private water supply. Most treatment units sold for home installation only treat <br /> water at the point of use, such as the kitchen faucet, and do not prevent exposure <br /> through skin contact, bathing or inhalation. As a result, point of entrX filters, <br /> 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 <br /> recommended water treatment device in this case. It operates by passing the well <br /> water through a charcoal bed, thereby absorbing the DBCP contaminant. Water <br /> treatment equipment suppliers and installers are listed in your phone directory <br /> yellow pages under "Water Filtration & Purification Equipment." <br /> A Division of San Joaquin Countv Health Care Services <br />