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SAN JOAQUIN COUNTY cgOF092t iGreatness grows here. July 12, 2021 Steel + Oil 9220 W. Hwy 12 Lodi, CA 95241 Environmental Health Department RE: Nitrates in your Water Well for 9220 W. Hwy 12, Lodi Jasjit Kang, REHS, Director Muniappa Naidu, REHS, Assistant Director PROGRAM COORDINATORS Robert McClellon, REHS Jeff Carruesco, REHS, RDI Willy Ng, REHS Melissa Nissim, REHS Steven Shih, REHS The Environmental Health Department (EHD) has received water test results taken by Terracon Consultants. The sample taken on April 9, 2021 was tested for nitrates showed results of 14.00 mg/L (milligrams per litre) Nitrate as Nitrogen in your domestic well at for 9220 W. Hwy 12, Lodi. The State Water Resources Control Board adopted a Maximum Contamination Level (MCL) of 10 mg/L for Nitrate as Nitrogen (N) in public drinking water systems; however, private well owners are not legally required to meet this standard. As a precaution for yourself, members and guests, the EHD would suggest that you have your domestic well tested annually to verify if the above-described chemical continues to be above state drinking standards. If your private well analysis for nitrate exceeds the State standard of 10 mg/L again, the following alternatives are being provided for your guidance: As a temporary measure, it is recommended that bottled drinking water be used if this well is supplying drinking water. Infants below the age of six months who drink water containing nitrate in excess of the MCL may quickly become seriously ill and, if untreated, may die because high nitrate levels can interfere with the capacity of the infant's blood to carry oxygen. Symptoms include shortness of breath and blueness of the skin. High nitrate levels may also affect the oxygen -carrying ability of the blood of pregnant women. 2. In cases where exposure may continue indefinitely, such as with contaminated private wells, installation of a water treatment device, such as a filter, may be advisable. However, using bottled water or installing a water treatment device at the kitchen water tap, will not stop exposure to nitrates in your private water supply. Most treatment units sold for home installation only treat water at the point of use, such as the kitchen faucet, and do not prevent exposure through skin contact, bathing or inhalation. As a result, point of entry filters, which treat water for the entire house, are recommended because they remove all potential sources of exposure. The "Reverse Osmosis Purification Filter" is the recommended water treatment device in this case. It operates by passing the well water through a series of filters and reverse osmosis membranes thereby removing the nitrate contaminant. Water treatment equipment suppliers and installers are listed in your phone directory yellow pages under "Water Filtration & Purification Equipment." 3. A replacement well is also an alternative for providing uncontaminated water. It is recommended that a test well be drilled, in order to determine water quality prior to final placement of the well. Water quality may be determined and monitored through water sample analysis performed by a State Certified Laboratory. (A list of State Certified Laboratories can be obtained from the following link: 1868 E. Hazelton Avenue I Stockton, California 95205 1 T 209 468-3420 1 F 209 464-0138 1 www.sjgov.org/ehd