The Pennsylvania Department of Environmental Protection has issued an Air Quality Plan Approval for the En-Tire Logistics of Milton PA LLC cogeneration facility in Union County.
The En-Tire plant will be authorized to combust a mixture of fuels—which includes natural gas and chipped waste tires—that will produce 7 MW and provide steam to the adjacent National Gypsum facility.
“The department has done a very careful and detailed review of this application during the past 18 months to be sure that all applicable federal and state air quality regulations will be met,” DEP North-central Regional Director Marcus Kohl said in a Sept. 27 statement. “In some areas, our plan approval application review exceeded state and federal requirements. We responded to more than 200 written comments we received from the public.”
DEP has determined that the proposed emission levels of air contaminants satisfy Best Available Control Technology (BACT) as well as the agency’s Best Available Technology (BAT) requirements. The department also determined that this facility satisfies all applicable requirements of state and federal air quality regulations, including Maximum Achievable Control Technology (MACT) requirements.
Although not required by state or federal regulations, DEP requested and En-Tire agreed to perform an inhalation risk assessment based on the estimated chronic risks posed by the proposed facility operating at maximum load, as well as two acute exposure scenarios from short-term emissions.
The En-Tire project includes a combustion unit rated at 185 million Btus per hour of heat input that incorporates kiln and boiler stages in series. The project also includes a dry sorbent storage and handling system, a cooling tower, and one aqueous ammonia storage tank. Emissions from the combustion unit will be controlled by a dry scrubber, fabric collector, oxidation catalyst, selective catalytic reduction, and a wet scrubber.