Re: variance to MN Dept of health rules

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( .. Mr. Thomas Stevens Mr: Larry Olson Page 2 November 24, 2004 The variance is granted because there is no location for a well on the subject property which complies with a11 required isolation distances. The proposed well location appears to provide the greatest available separation between the well and known contamination sources. Because the isolation distance between the proposed well and the existing buried sewer is less - than required in rule, additional construction methods and precautions axe required in order to reduce the potential for contamination of the well and groundwater. Adherence to the following list of additional conditions and requirements should provide the necessary additional protection for the well and groundwater. The variance is granted with the following conditions: 1. You must notify Mr. Edson at 651/643-2109 at least 24 hours prior to beginning well construction so that an inspector may be present during construction. 2. The casing for the subj ect well must extend to a depth of at least 100 feet. 3. The annular space between the casing and the bore hole wall from a depth of at least 100 feet up to the ground surface or base of the pitless connection 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 sealant. High-solids bentonite grout must be mixed 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 a depth of at least 100 feet up to the ground surface or base of the pitless connection. Any annular space surrounding the casing below a depth of 100 feet in unconsolidated materials may be filled with drill cuttings taken from the well, or neat cement or high-solids bentonite grout. 4. The existing well must be sealed in accordance with Minnesota Rules, Chapter 4725,within 30 days after the new well is put into service. 5. All other provisions of Minnesota Rules, Chapter 4725, are in effect. Alternative measures or conditions attached to a variance have the force of law and effect of applicable rule. If a party violates the alternative measures or conditions attached to the variance, the party is subject to enforcement actions arid 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.