[Code of Federal Regulations] [Title 40, Volume 24] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR204.52] [Page 91-92] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 204_NOISE EMISSION STANDARDS FOR CONSTRUCTION EQUIPMENT--Table of Contents Subpart B_Portable Air Compressors Sec. 204.52 Portable air compressor noise emission standard. (a) Effective January 1, 1978, portable air compressors with maximum rated capacity of less than or equal to 250 cubic feet per minute (cfm) shall not produce an average sound level in excess of 76 dBA when measured and evaluated according to the methodology provided by this regulation. Effective July 1, 1978, portable air compressors with maximum rated capacity greater than 250 cfm shall not produce an average sound level in excess of 76 dBA [[Page 92]] when measured and evaluated according to the methodology provided by this regulation. (b) In-Use Standard. [Reserved] (c) Low Noise Emission Product. [Reserved]