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PUBLIC HEALTH SERVICES <br /> G <br /> SAN JOAQUIN COUNTY <br /> JOG[ KHANNA-Nf.D..M.P H. <br /> Health Officer yf� <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 i F o a <br /> (209) 468-3400 <br /> February 11, 1992 <br /> Kevin Delu C (apy <br /> 15175 N. DeVries <br /> Lodi, Ca 95242 <br /> Re : Soil Suitability Study for MS-92-22 <br /> A soil suitability study was submitted by Baumback & Pizza Civil <br /> Engineers in which a test for Nitrate was tested for and showed <br /> results of 62 mg/l (parts per billion) . <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 however, private well owners are not legally required to <br /> meet this standard. As a precaution for yourself and family, we <br /> would suggest that you have your domestic well retested to verify <br /> the above sample results . <br /> If your private and/or agricultural well analysis for nitrate <br /> exceeded the State standard of 45 ppm again, the following <br /> alternatives 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 a <br /> water treatment device, such as a filter, maybe <br /> advisable. However, using bottled water or installing a <br /> water treatment device at the kitchen water tap, will not <br /> stop exposure to if it is in your private water supply. <br /> Most treatment units sold for home installation only <br /> treat water at the point of use, such as the kitchen <br /> faucet . As a result, point of entry filters, which treat <br /> water for the entire house, are recommended because they <br /> remove all potential sources of exposure. The "Reverse <br /> Osmosis Purification Filter" is the recommended water <br /> treatment device in this case. It operates by passing <br /> the well water through a series of filters and reverse <br /> osmosis membranes thereby removing the nitrate <br /> contaminant . Water treatment equipment suppliers and <br /> installers are listed in your phone directory yellow <br /> pages under "Water Filtration & Purification Equipment . " <br /> A Division of San Joaquin County Health(are Services 0 <br />