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PUBLIC HEALTH SERVICES <br /> PpUliy <br /> ' SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION r. <br /> e: �T� fir• <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 C9Cj F6.Ra P <br /> '209/468-3420 <br /> July 31, 1996 <br /> Virginia Winslow <br /> c/o Roger Winslow <br /> 8181 East French Camp Road <br /> Manteca, CA 95336 <br /> Regarding: Nitrate In Your Water Wells (MS-96-7) <br /> 7633 East French Camp Road, Manteca <br /> A soil suitability study was submitted by Neil Anderson, in which your well was tested for nitrate and showed results of 89 MG/L <br /> ppb (parts per million) in your well located at 7633 East French Camp Road, Manteca. <br /> The State Department of Health Services has adopted a standard of 45 ppm (parts per million) for nitrates in public drinking water <br /> systems however, private well owners are not legally required to meet this standard. As a precaution for yourself and family, we <br /> would suggest that you have the well retested to verify the above described sample results. <br /> If your private and/or agricultural well analysis for nitrate exceeded the State standard of 45 ppm, the following alternatives are <br /> being provided for your guidance: <br /> 1. As a temporary measure, it is recommended that bottled drinking water is to be used. <br /> 2. In cases where exposure may continue indefinitely, such as with contaminated private wells, installation of a water <br /> treatment device, such as a filter, may be advisable. However, using bottled water or installing a water treatment <br /> device at the kitchen water tap, will not stop exposure to if it is in your private water supply. Most treatment units <br /> sold for home installation only treat water at the point of use, such as the kitchen faucet. As a result, oip nt of <br /> entry filters, which treat water for the entire house, are recommended because they remove all potential sources <br /> of exposure. The "Reverse Osmosis Purification Filter' is the recommended water treatment device in this case. <br /> It operates by passing the well water through a series of filters and reverse osmosis membranes thereby removing <br /> the nitrate contaminant. Water treatment equipment suppliers and installers are listed in your telephone directory <br /> yellow pages under 'Water Filtration & Purification Equipment". <br /> 3. A replacement well is also an alternative for providing uncontaminated water. It is recommended that a test well <br /> be drilled, in order to determine water quality prior to final placement of the well. Water quality may be <br /> determined and monitored through water sample analysis performed by a State Certified Laboratory (see attached <br /> list of State Certified Laboratories). <br /> If you have any questions please call Bill Marchese, Registered Environmental Health Specialist, at (209)468-3445. <br /> Ernest M. Fujimoto, M.D.N.P.H. <br /> Acting Health Officer <br />-c"Mike Huggins, Supervising Senior R.E.H.S., R.D.I. <br /> Environmental Health Division <br /> A Division of San Joaquin Count} Health Care Services <br />