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PUBLIC HEALTH SERVICES �0 �u, <br /> �0 <br /> SAN JOAQUIN COUNTY r. <br /> J061 KHANNA M.D.,M.P.H. <br /> Health Officer P <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br /> c4��FOR�. <br /> November 13, 1992 (209) 468-3400 <br /> William & Joyce Degroot <br /> 22713 East River Road <br /> Escalon, Ca 95320 <br /> Re: MS-92-168 <br /> A soil suitability study was submitted by Don Chesney in which a test for Nitrate was tested for <br /> and showed results of 50 ppm (parts per billion) in your domestic well. <br /> The State Department of Health Services adopted a standard of 45 parts per million (ppm) for <br /> nitrates in public drinking water systems however, private well owners are not legally required <br /> to meet this standard. As a precaution for yourself and family, we would suggest that you have <br /> your domestic well retested to verify the above sample results. <br /> If your private and/or agricultural well analysis for nitrate exceeded the State standard of 45 ppm <br /> again, 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 if this well is supplying drinking water.. <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 filter, maybe <br /> advisable. However, using bottled water or installing a water treatment device <br /> at the kitchen water tap, will not stop exposure to if it is in your private water <br /> supply. Most treatment units sold for home installation only treat water at the <br /> point of use, such as the kitchen faucet. As a result, point of entry filters, which <br /> treat water for the entire house, are recommended because they remove all <br /> potential sources of exposure. The "Reverse Osmosis Purification Filter" is the <br /> recommended water treatment device in this case. It operates by passing the well <br /> water through a series of filters and reverse osmosis membranes thereby removing <br /> the nitrate contaminant. Water treatment equipment suppliers and installers are <br /> listed in your phone directory yellow pages under "Water Filtration & <br /> Purification Equipment." <br /> 3. A replacement well is also an alternative for providing uncontaminated water. <br /> It is recommended that a test well be drilled, in order to determine water quality <br /> prior to final placement of the well. Water quality may be determined and <br /> A Division of San Joaquin County Health gait wmccs �� <br />