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"` Minnesota Department of Health <br /> • Division of Environmental Health <br /> 925 Delaware Street Southeast <br /> 41.---.. <br /> P.O. Box 59040 <br /> Minneapolis, MN 55459-0040 <br /> (612) 627-5100 . f IJ L( V. D MAR 18 1993" <br /> March 17, 1993 <br /> Steve Rohlf <br /> Building and Zoning Administrator <br /> City of Elk River <br /> 720 Dodge Avenue <br /> Elk River, Minnesota 55330 <br /> Dear Mr. Rohif: <br /> Minnesota Department of Health (MDH) staff has reviewed the Environmental Assessment <br /> Worksheet (EAW) for the proposed Elk Park Center in the City of Elk River and offers the <br /> following comments for consideration. <br /> Re: permits. Well sealing notifications must be submitted prior to sealing abandoned wells. <br /> Also, dewatering well permits must be applied for and approved prior to construction of <br /> II <br /> dewatering wells greater than 45 feet deep (or greater than 25 feet deep, if constructed after <br /> June 30, 1994). <br /> Re: water use. The EAW indicates about seven wells will be abandoned. These wells must <br /> be sealed by a licensed well contractor or licensed well sealing contractor. <br /> Dewatering wells greater than 45 feet in depth must be constructed by a licensed well <br /> contractor or licensed dewatering well contractor. After June 30, 1994, a license will also <br /> be required to construct dewatering wells greater than 25 feet in depth. <br /> The EAW also states that dewatering should have little long term impact because the <br /> immediate area has full utilities. There are several potable water supply wells near the site; <br /> most are deep wells not likely to be affected by dewatering. Our computer records indicate <br /> that some wells in the area are completed in the surficial aquifer. Depending on the <br /> location and extent of the dewatering, these shallow water supply wells may be affected. A <br /> licensee (well contractor) who installs a dewatering well that causes the loss of an adequate <br /> private potable water supply must provide the private well owner with a temporary supply <br /> of potable water during the operation of the dewatering well. The supply must be adequate <br /> for drinking, cooking, and other household uses. The commissioner (of health) may require <br /> the private well to be tested to determine if a health risk exists before the licensee <br /> discontinues an alternate water supply. The licensee must assure that the required testing <br /> • is completed and reported to the commissioner. <br /> An Equal Opportunity Employer <br />