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y <br /> 4 ENVIROIN TWENTAL HEALTH EPARTINIENT <br /> Q <br /> /110 - c SAN JOAQUIN COUNTY <br /> c <br /> Q: • a <br /> Donna K.Hcran,R.E.H.S. Unit Sar per•risor.v <br /> Director <br /> 304 East Weber Avenue, Third Floor carr Qor«I»an. R.F.Ks. <br /> � 1 AlOlsen,R.E.H.S. Milo Huegins- R.E.H.S., R-D.f. <br /> Stockton California 9502-2708 <br /> • C, P Program?Manager Telephone: (209) DotsA s W. Wilson, R.E.H.S. <br /> Laurie A.Cotu[la,R.E.H.S. p { } 468-3420 N13r2ac-et Lagorio, R.E.H.S. <br /> Program rt9anager Fax: 209} 46=1-0138 Robert\qcClellon.R.E.H.S. <br /> dark Barcellos. R.E.H.S. <br /> June 24, 2005 FILE C <br /> I <br /> Janet E. Smythe <br /> 14701 E. Copperopolis Rd. <br /> Stockton, CA 95215 <br /> RE: Nitrates in your Water WeII for Minor Subdivision PA-0400426 <br /> Located at 14721 East Copperopolis Road, Stockton <br /> As part of the Minor Subdivision process, water test results were submitted by Dillon & Murphy <br /> in which a sample taken April 29, 2005, was tested for Nitrates and showed results of 48.5 ppm <br /> (parts per million) in your domestic well at the above referenced 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 j <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 /> I. 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 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 /> equipment suppliers and installers are listed in your phone directory yellow pages under <br /> "Water Filtration & Purification Equipment." <br /> Nitrate Well 5105 <br /> 1 <br />