The U.S. Environmental Protection Agency (EPA) proposed a rule on March 15, 2013, limiting emissions from wool fiberglass manufacturing under the Clean Air Act National Emission Standards for Hazardous Air Pollutants. Comments will be due 45 days after publication in the Federal Register, and requests for hearing must be submitted within 10 days of publication. If such requests are received, the hearing will take place April 18.

According to EPA, the action proposes “chromium and particulate matter standards for wool fiberglass gas-fired glass-melting furnaces at area sources and adds these sources to the category list in the Urban Air Toxics Strategy.” It also proposes amendments to the existing major source rules for mineral wool and wool fiberglass, supplementing the rule proposed on November 25, 2011.

EPA stated that the proposed area source standards for the gas-fired glassmelting furnaces used to make wool fiberglass would increase the level of environmental protection. The proposal calls for the installation of a sodium hydroxide scrubber at gas-fired glass-melting furnaces and contemplates emission reductions of 455 pounds per year at a cost of $835 per pound. It also would require rotary spin and flame attenuation manufacturing lines to install and operate thermal oxidizers and estimates an annual emission reduction of 123 tons, with a cost of $6,750 per ton.