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� ;1�. . � Ms. Betty Vogt Mr. Mazk Stodola Mr. Robert Waade Page 2 January 20, 1998 2. The well casing must extend to a depth of at least 50 feet. 3. The annular space between the casing and the bore hole wall, from a minimum depth of 500 feet to the base of the pidess unit, must be filled with neat-cement grout as defined in Minnesota Rules, part 4725.0100 or high solids bentonite grout that is NSF approved and marketed as a well sealani. High solids bentoiufie grout rrYust be r�iiked to the manufacturer's specifications, or must meet the minimum requirements of 15 percent by weight bentonite as specified in Minnesota Rules, Chapter 4725, whichever is heavier. Grout must be inserted through the casing or through a tremie pipe from the bottom up. The annular space below 50 feet must be completely filled with cuttings taken from the � drill hole, or with grout as described above, 4. All buried sewers on the property between 50 and 20 feet of the well must be constructed of cast iron or plastic pipe meeting the material specifications and installation methods described in Minnesota Rules, parts 4715.0530 and 4715.2820. The pipe must be successfully air-tested after installation by a licensed plumber, sewer installer if a plumbing license is not required, or in the presence of a local plumbing or zoning official or Minnesota Department of Health (MDI� representative. The tester must submit written verification that the pipe was successfully tested at a uniform pressure of 5 pounds per square inch for 15 minutes as required by the Minnesota Plumbing Code, rule part 4715.2820. Installation of the sewer must also meet the requirements of the city of Orono. 5. You must contact Mr. Stevens at (612) 215-0830 or Mr. Ron Thompson at (612) 215-0831 at least 24 hours prior to starting well construction so that an inspector may be present during the construction of this well. 6. All other provisions of Minnesota Rules, Chapter 4725, shall be in effect. Alternative measures or conditions attached to a variance have the force of rule and effect of applicable rule. If the party violates the alternative measures or conditions attached to the variance, the party is subject to enforcement actions and penalties provided in the applicable law or rule. This variance is conditioned upon the applicable acceptance of and compliance with the conditions of the variance. Failure by the applicant to comply with the conditions prescribed in the variance will result in the immediate expiration of the variance.