No owner or operator of an iron and steel plant shall allow to be discharged into the atmosphere from any basic oxygen process furnace any gases that contain filterable particulate matter in excess of 50 mg/dscm (0.022 gr/dscf).
Minn. R. agency 167, ch. 7011, IRON AND STEEL PLANTS, pt. 7011.2005
Statutory Authority: MS s 116.07