8.3. SR 05-16-2013 - Laserfiche WebLink

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(2) Upon request by the owner or operator,the commissioner may establish alternative limits for some or all substances for portions of a facility filled before November 15, 1988. Unless approved by the agency, or by the commissioner as provided in subitem (1),the alternative limits must not exceed four times the concentrations given in item F.The owner or operator must have completed a remedial investigation study evaluating the extent and severity of ground water pollution at the facility and a feasibility study evaluating the feasibility and the environmental and economic costs, risks, and benefits of the possible alternative corrective actions.The alternative approaches must include corrective actions intended to achieve compliance with the standards under items E and F and at least one additional approach intended to maintain ground water concentrations lower than four times the concentrations under item F.The feasibility study also must evaluate the pollutant concentrations that would remain in ground water after corrective action and the extent to which the use of these alternative limits may adversely affect the immediate and future use of ground water downgradient from the facility. (3) If the quality of a public water supply is potentially affected by migration of leachate from a facility, and if the maximum contaminant level for a substance as defined and established under either chapter 4720 or under the National Primary Drinking Water Regulations, Code of Federal Regulations,title 40, part 141, is a lower concentration than the standard under items E and F, the commissioner may use the maximum contaminant level as the alternative standard and alternative intervention limit for that substance. (4) If a substance is present in ground water at a facility, and if that substance is known to impart undesirable taste or odor to drinking water,the commissioner may upon the recommendation of the Minnesota commissioner of health establish alternative limits to avoid these taste and odor effects. (5) If a substance not listed in item F is present in ground water at a facility and is determined by the Minnesota commissioner of health to be potentially harmful to health,the commissioner may establish alternative limits for that substance. Except as provided elsewhere in this subpart,the alternative limits shall be 25 percent of the concentration given in unit(a) or(b): (a) For a substance not classified by the United States Environmental Protection Agency as Group A(human carcinogen) or Group B (probable human carcinogen), the recommended allowable limit, as determined by the Minnesota commissioner of health; or (b)