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San Joaquin County DIRECTOR <br /> O Po.�.!N C Donna Heran,REHS <br /> �. _ .O Environmental Health Department ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla, REHS <br /> Stockton, California 95202-3029 <br /> PROGRAM COORDINATORS <br /> Carl Borgman,REHS <br /> C �N`P Website: www.s ov.or /ehd Mike Huggins,REHS,RDI <br /> 4�1FO t /g g Margaret Lagorio, REHS <br /> Phone: (209) 468-3420 Robert McClellon, REHS <br /> Fax: (209)464-0138 Jeff Carruesco,REHS,RDI <br /> Kasey Foley, REHS <br /> December 3, 2008 Haertl Family Limited PartnershipCOPY PO Box 1076 <br /> West Sacramento, CA 95691 <br /> Subject: Nitrates in your Water Well for Minor Subdivision PA-0800324 (MS) <br /> As part of the Site Approval process, water test results were submitted by Chesney Consulting <br /> in which samples were taken October 27, 2008, were tested for nitrates and showed results of <br /> 128-144 ppm (parts per million) in your domestic well(s) at 17871 East Lone Tree Road, <br /> Escalon, CA 95320. <br /> The State Department of Health Services adopted a standard of 45 ppm for nitrates in public <br /> drinking water systems; however, private owners are not legally required to meet this standard. <br /> As a precaution for yourself, members and guests, the Environmental Health Department would <br /> suggest that you have your domestic well tested annually to verify if the above-described <br /> 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 <br /> 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 <br /> is 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 <br /> prevent exposure through skin contact, bathing or inhalation. As a result, point of entry <br /> filters, which treat water for the entire house, are recommended because they remove all <br /> 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 /> placement of the well. Water quality may be determined and monitored through water <br />