This print ISBN is the U.S. Federal Government official edition. 40CFR, Pt. 81, continues coverage of Protection of Environment, Environmental Protection Agency (EPA)--Air Programs. This includes designation of areas for air quality planning purposes. Related items: The Annual CFR Print Subscription can be found here: https://bookstore.gpo.gov/products/code-federal-regulations-subscription-service-2017-paperback-0 CFR Title 40, Protection of Environment publications can be found here: https://bookstore.gpo.gov/catalog/cfr-title-40-protection-environment Environment and Nature resources collection is available here: https://bookstore.gpo.gov/catalog/environment-nature

40 CFR Part 63 (Section 63.600 to 63.001199) continues coverage for rules, procedures, processes, and regulations relating to the United States Environmental Protection Agency (EPA). This volume specifically provides information relation to the National Emission Standards for hazardous air pollutants from phosophoric acid manufacturing plants and coverage of air programs. Standards, compliance dates, performance tests, operating and monitoring requirements and enforcements are presented with tables displaying emission limitations sources, and more. Never miss an updated regulation by signing up for the annual print CFR (Code of Federal Regulations) annual print subscription here: https://bookstore.gpo.gov/products/code-federal-regulationspaper2018 Environmental Protection & Conservation resources collection is available here: https://bookstore.gpo.gov/catalog/environmental-protection-conservation Other products produced by the U.S. Environmental Protection Agency (U.S. EPA) can be found here:https://bookstore.gpo.gov/agency/environmental-protection-agency-epa