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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Donna K.Heran,R.E.H.S. Unit Supervisors <br /> =` Director 304 .East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Mike Huggins, R.E.H.S.,R.D.I. <br /> •` Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W. Wilson,R.E.H.S. <br /> �Ii 6. P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotull nager Fitf38R.E.H.S. <br /> Program YlaFax: (20 Robert McClellon,R.E.H.S. <br /> COpyMark Barcellos,R.E.H.S, <br /> September 8, 2004 <br /> Syble Evans <br /> 11130 S. Union Road <br /> Manteca, CA 95336 <br /> RE: Nitrates in your Water Well for MS-01-18, at 11130 South Union Road, Manteca <br /> A Soil Suitability Study was submitted by Neil Anderson & Associates, Inc. in which an analysis <br /> for Nitrate was tested and showed results of 70.5 mgL/NO3 ppm (parts per million) in your <br /> domestic well at 11130 South Union Road, Manteca, California. <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, members and guests, the Environmental <br /> Health Department would suggest that you have your domestic well tested annually to verify if <br /> the above-described chemical continues to be above state drinking standards. <br /> If your private well analysis for nitrate exceeds 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 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 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, and do not prevent <br /> exposure through skin contact, bathing or inhalation. As a result,point of eg=filters, which <br /> 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 <br /> device in this case. Itoperates by passing the well water through a series of filters and <br /> reverse osmosis membranes thereby removing the nitrate contaminant. Water treatment <br /> equipment suppliers and installers are listed in your phone directory yellow pages under <br /> "Water Filtration& Purification Equipment." <br />