From the air permit (facility description section): On May 18, 1984, the plant was issued its initial air emission facility permit to install and operate. In 1996 the total facility permit was revised to account for the addition of a Regenerative Thermal Oxidizer (RTO). U.S. Environmental Protection Agency issued a Consent Decree to Louisiana-Pacific Corporation that required all oriented strand board plants to install RTOs. The Title V Air Permit Application was submitted March 1995. The air emission units that exist at this plant consist of a rotary wood wafer dryer, two thermal oil heaters, one board press, twenty-two natural gas fired paint drying ovens, painting operations, and three wood waste handling operations. "DESCRIPTION OF THE MODIFICATION This permit amendment eliminates the requirement for the facility to perform full computer dispersion modeling. It is current MPCA policy to require full dispersion modeling for PM10, SO2, NOx,, or CO if a facility has both potential and actual emissions of any of those pollutants over 100 tons. Though Louisiana Pacific’s potential emissions exceed 100 tons for NOx, PM10, and CO, actual emissions for all pollutants are less than 100 tons."