40 CFR Parts 50-51 continues coverage of the United States Environmental Protection Agency. In this volume, you will find rules, processes, procedures, and regulations pertaining to air quality standards and methods for monitoring air quality, plus State Action reporting of emissions testing compliance, economic incentives standards program, and more. Personal and commercial vehicle owners, County and State Motor Vehicle departments, automobile manufacturers including auto parts manufacturers will be interested in this volume. Additionally, students pursuing coursework and assignments relating to environmental science and emissions standards, compliance, and regulations will be interested in this volume. Environmental scientists and attorneys plus academic, public, and special libraries will want to have a copy of this volume in their regulatory collections. Code of Federal Regulations Title 40, Volume 2, July 1, 2015 Containing parts Parts 50 to 51 Part 50; NATIONAL PRIMARY AND SECONDARY AMBIENT AIR QUALITY STANDARDS Part 51; REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS