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ENVIRONMENTAL HEALTri LEPARTMENT <br /> PpU1N <br /> Donna K. Heran, R.E.H.S. SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> Director304 East Weber Avenue,Third Floor Carl Borgman,R.E.H.S. <br /> , <br /> AI Olsen, R.E.H.S. <br /> Stockton California 95202-2708 Mike Huggins, R.E.H.S.. R.D.I. <br /> ., CP• Program Manager Telephone: ( (9)468-3420 Douglas t Wilson. R.E.H.S. <br /> 2 <br /> 9�,FOR� p — Margaret Lagorio.R.E.H.S. <br /> Laurie A. Cotulla, R.E.H.S. Fax: (209) 164-0138 Robert McClellon, R.E.H.S. <br /> Program Manager <br /> Website:wwkcsi-oN,.org/ehd/ Jeff Carruesco, R.E.H.S. <br /> November 28, 2005 <br /> FILE COPY <br /> Stacey Griffith <br /> 11875 E. Mayers Road <br /> Acampo, CA 95212 <br /> RE: Nitrates in your Water Well for Site Approval PA-0400392 <br /> At 5801 East Foppiano Lane, Stockton <br /> As part of the Major Subdivision Approval process, water test results were submitted by Neil O. <br /> Anderson and Associates, Inc. in which a sample taken August 22, 2005, was tested for Nitrates <br /> and showed results of 69.0 ppm (parts per million) in your domestic well at the above referenced <br /> address. <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 drinkine 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 entry 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. It operates by passing the well water through a series of filters and <br /> reverse osmosis membranes thereby removing the nitrate contaminant. Water treatment <br />