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°u'" SAN 10AQUIN p <br /> �� Environmental Health Department <br /> COUNTY <br /> ae � , Jasjit Kang, REHS, Director <br /> t'q croa`P Greatness grows here. Muniappa Naidu,REHS,Assistant Director <br /> PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng, REHS <br /> Michael Kith, REHS <br /> January 15, 2021 ORIGINAL Melissa Nissim, REHS <br /> Chester Murphy <br /> 20449 E. Oakwood Road, <br /> Stockton, CA 95215 <br /> RE: Nitrates in your Water Well for 20449 E. Oakwood Road, Stockton <br /> The Environmental Health Department (EHD) has received water test results taken by FGL <br /> Environmental. The sample taken on December 1, 2020 was tested for nitrates showed results of 14.3 <br /> mg/L (milligrams per litre) Nitrate as Nitrogen in your domestic well at for 20449 E. Oakwood Road, <br /> Stockton. <br /> The State Water Resources Control Board adopted a Maximum Contamination Level (MCL) of 10 mg/L <br /> for Nitrate as Nitrogen (N) in public drinking water systems; however, private well owners are not legally <br /> required to meet this standard. As a precaution for yourself, members and guests, the EHD would <br /> suggest that you have your domestic well tested annually to verify if the above-described chemical <br /> continues to be above state drinking standards. <br /> If your private well analysis for nitrate exceeds the State standard of 10 mg/L 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 supplying <br /> drinking water. Infants below the age of six months who drink water containing nitrate in excess of <br /> the MCL may quickly become seriously ill and, if untreated, may die because high nitrate levels can <br /> interfere with the capacity of the infant's blood to carry oxygen. Symptoms include shortness of breath <br /> and blueness of the skin. High nitrate levels may also affect the oxygen-carrying ability of the blood <br /> of pregnant women. <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 bottled <br /> water or installing a water treatment device at the kitchen water tap, will not stop exposure to nitrates <br /> in your private water supply. Most treatment units sold for home installation only treat water at the <br /> point of use, such as the kitchen faucet, and do not prevent exposure through skin contact, bathing <br /> or inhalation. As a result, point of entry filters, which treat water for the entire house, are <br /> recommended because they remove all potential sources of exposure. The "Reverse Osmosis <br /> Purification Filter" is the recommended water treatment device in this case. It operates by passing <br /> the well water 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 directory <br /> yellow pages under"Water Filtration & Purification Equipment." <br /> 3. A replacement well is also an alternative for providing uncontaminated water. It is recommended that <br /> a test well be drilled, in order to determine water quality prior to final placement of the well. Water <br /> quality may be determined and monitored through water sample analysis performed by a State <br /> 1868 E. Hazelton Avenue I Stockton, California 952051 T 209 468-3420 1 F 209 464-0138 1 www.sjgov.org/ehd <br />