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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY r. ? <br /> JOGI KHANNA M.D.,M.P H. <br /> Health Officer <br /> P.O. Box 2009 0 (1601 East Hazelton Avenue) Stockton, California 95201 , F 6.0 <br /> (209) 468-3400 <br /> December 30, 1991 <br /> Mr. Samuel Shimozaki <br /> 14235 N. Vintage Road <br /> Lodi, CA 95240 <br /> Re: Nitrates in your Water Wells/ MS-92-06 <br /> A soil suitability study was submitted by Neil Anderson Associates, <br /> Inc, , in which test for Inorganic Chemical Nitrate was tested for <br /> and showed results of 63 mg/l (parts per million) . <br /> The State Department of Health Services adopted a standard of 45 <br /> parts per million (ppm) for nitrates in public drinking water <br /> systems in 1989, however, private well owners are not legally <br /> required to meet this standard. <br /> If your private and/or agricultural well analysis for Nitrate <br /> exceeded the State standard of 45 ppm, the following alternatives <br /> are being provided for your guidance: <br /> 1 . As a temporary measure, it is recommended that bottled <br /> drinking water to be used. <br /> 2 . In cases where exposure may continue indefinitely, such <br /> as with contaminated private wells, installation of water <br /> treatment device, sudh as a filter, may be advisable. <br /> However, using bottled water or installing a water <br /> treatment device at the kitchen water tap, will not stop <br /> exposure to if it is in your private water supply. Most <br /> treatment units sold for home installation only treat <br /> water at the point of use, such as the kitchen faucet. <br /> As a result, Point of entry filters, which treat water <br /> for the entire house, are recommended because they remove <br /> all potential sources of exposure. The "Reverse Osmosis <br /> Purification Filter" is the recommended water treatment <br /> device in this case. It operates by passing the well <br /> water through a series of filters and reverse osmosis <br /> membranes thereby removing the nitrate contaminant. <br /> Water treatment equipment suppliers and installers are <br /> listed in your phone directory yellow pages under "Water <br /> Filtration & Purification Equipment. " <br /> 3 . A replacement well is also an alternative for providing <br /> uncontaminated water. It is recommended that a test well <br /> be drilled, in order to determine water quality prior to <br /> final placement of the well. Water quality may be <br /> A Division of San Joaquin Counry Health Care Services �� <br />