250-RICR-120-05-1. Visible Emissions (version Periodic Refile, 12/31/2001 to 07/19/2007)

AIR POLLUTION CONTROL REGULATION NO. 1 VISIBLE EMISSIONS Effective 2 August 1967 Last Amended 22 February 1977 RHODE ISLAND DEPARTMENT OF ENVIRONMENTAL MANAGEMENT DIVISION OF AIR RESOURCES AIR POLLUTION CONTROL REGULATION NO. 1 VISIBLE EMISSIONS 1. Visible Emissions 1.1 Definitions As used in these regulations, the following terms shall, where the context permits, be construed as follows: 1.1.1 "Opacity" means the degree to which the air contaminants reduce the transmission of light and obscure a contrasting background. 1.2 Limitations No person shall emit into the atmosphere from any source any air contaminant for a period or periods aggregating more than three minutes in any one hour which is greater than or equal to 20 percent opacity. 1.3 Test Procedure and Observer Qualifications 1.3.1 All tests must be performed as per the Code of Federal Regulations, Title 40, Part 60, Appendix A, Method 9. 1.3.2 All observers must qualify as per the Code of Federal Regulations, Title 40, Part 60, Appendix A, Method 9. 1.4 Exemptions Where the presence of uncombined water is the only reason for failure to meet the requirements of Section 1.2, such failure shall not be a violation of this regulation. 1-1