Minnesota Pollution Control Agency (MPCA) is proposing to adopt amended air quality rules within “exempt source/conditionally insignificant activities rules” to clarify permit requirements for small sources of air emissions and update rules governing the treatment of small air pollution emitting activities (“insignificant activities” and “conditionally insignificant activities”). Written comments on the proposed rules are being accepted until May 29, 2018.
Changes create four new categories of conditionally exempt stationary sources where emissions primarily come from one type of activity; auto-body refinishing facilities, coating facilities, woodworking facilities, and insignificant facilities that meet applicable technical standard would be exempt from obtaining an air emissions permit. Changes to the existing categories of conditionally exempt sources, gasoline service stations and concrete manufacturing, are made to align with the rule structure for the new categories.