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PUBLIC HLALTH SERVICtS lell <br /> SAN JOAQUIN COUNTY r. <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer �. P <br /> 304 East Weber Avenue, Third Floor - Stockton, CA 95202 <br /> 209/468-3420 <br /> August 17, 1999 <br /> FILE CCPY <br /> Mr. John Demichelis <br /> 14807 South Murphy Road <br /> Escalon, California 95320 <br /> RE: Soil Suitability Study for MS-99-08 at 17308 Avena Road <br /> A soil suitability study was submitted by Quality Control/Inspection, in which a test for Nitrate <br /> was tested for and showed results of 66 mg/L (parts per million) in your agriculture 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 re-tested 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 be used if this well is <br /> supplying drinking water. <br /> 2. In cases where exposure may continue indefinitely, such as with contaminated private wells, <br /> installation of a water treatment device, such as a filter, may be advisable. However, using <br /> bottled water or installing a water treatment device at the kitchen water tap, will not stop <br /> exposure to nitrates if it is in your private water supply. Most treatment units sold for home <br /> installation only treat water at the point of use, such as the kitchen faucet. As a result, point <br /> of entry filters, which treat water for the entire house, are recommended because they remove <br /> all 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 water <br /> through a series of filters and reverse osmosis membranes, thereby removing the nitrate <br /> contaminant. Water treatment equipment suppliers and installers are listed in your phone <br /> directory yellow pages under"Water Filtration & Purification Equipment." <br /> 3. A replacement well is also an alternative for providing uncontaminated water. It is <br /> recommended that a test well be drilled, in order to determine water quality prior to final <br /> A Division of San Joaquin County Health Care Services <br />