State of Rhode Island Department of Environmental Management

Office ofAir Resources Notice of Public_Hearing-and Comment Period Concerning adoption ofthe proposed "Providence Carbon Monoxide Limited Maintenance Plan" and proposed amendments to the "Rhode Island Air Pollution Control General Definitions" regulation and to Air Pollution Control Regulation Nos. 9, 11, 22 and 36 . Notice is hereby given that a public hearing regarding adoption of the "Providence Carbon Monoxide Limited Maintenance Plan" and proposed amendments to the "Rhode Island Air Pollution Control General Definitions" regulation and to Air Pollution Control Regulation Nos. 9, 11, 22 and 36 will be held in Room 300ofthe Department of Environmental Management, at 235 PromenadeStreet, Providence, Rhode Island on Friday, August 8, 2008 at 10:00AM, at which time interested parties will be heard. The proposed "Providence Carbon Monoxide Limited Maintenance Plan" specifies measures that will be used by the Department to ensure that Providence remains in attainment of the National Ambient Air Quality Standard for carbon monoxide through 2011 . The proposed revisions to Regulation No. 11, "PetroleumLiquids Marketing and Storage," would allowgasoline dispensing facilities that exclusively fuel rental cars or corporate or commercial fleets to apply for exemption fromStage 11 vapor recovery requirements andwould require annual testing of pressure vacuumcaps on Stage 11 systems. The proposed revisions to Regulation No. 22, "Air Toxics" would update several Acceptable Ambient Levels and Minimum Quantity thresholds; add an additional substance, n-propyl bromide, to the list of regulated air toxics; exempt existing fuel burning sources (including those burning biodiesel), as well as water pollution control systems and small organic solvent cleaning sources; and clarify reporting requirements. The Minimum Quantities listed in Regulation No. 9, "Air Pollution Control Permits," would be changed to be consistent with those in Regulation No. 22. Two guidelines that are referenced in Regulation No. 22, the "Rhode Island Air Toxics Guideline" and the "Rhode Island Guideline for Air Quality Modeling for Air Toxics Sources," would also be updated. The proposed update to the modeling guideline specifies that, henceforth, the Department will performonly screening level modeling when evaluating permit applications. The proposed revision to regulation No. 36, "Control of Emissions fromOrganic Solvent Cleaning," would exempt cold cleaners using solvents containing 5% or less volatile organic compounds and volatile hazardous air pollutants, clarify work practice and reporting requirements, regulate vapor cleaners using trans 1,2-dichloroethylene or n-propyl bromide, adopt federal facility-wide emissions limits and establish a vapor pressure limit for solvents used for cold cleaning. . The General Definitions regulation would be amended to include definitions consistent with the proposed updates of Regulations No. 22 and 36 .The Office ofAir Resources has determined that implementation of the proposed amendments to

Regulation No. I 1 and the General Definitions regulation would not have a significant adverse economic impact on small businesses, cities or towns. Implementation ofthe proposed amendments to Regulation Nos. 9, 22 and 36 may have a significant adverse economic impact on small businesses, cities or towns that operate solvent cleaning operations or processes that emit air toxics. The Office ofAir Resources is requesting comments specifically on how these economic impacts can be minimized or eliminated. Copies ofthe proposed maintenance plan, amended regulations and guidelines, and associated fact sheets are available fromthe Office of Air Resources, 235 Promenade Street, Providence, Rhode Island, between 8:30 amand 4:00 PM and fromtheAir Resources section ofthe Department's web site at www .dem .ri .govl . Formore information contact Barbara Morin at (401) 222-4700, ext. 7012, TCDD (401) 222-6800. Written comments may be sent to the Office ofAirResources at the above address until 4:00 PM on Friday, August 8, 2008, at which time the comment period will end, unless extended by the hearing officer. It is requested that persons who wish to make comments during the public hearing submit a copy oftheir statement for the record. Members ofthe Office ofAir Resources mayquestion commenters concerning their remarks. The Department of Environmental Management building is accessible to those with disabilities. Persons ~vith disabilities requiring accomn:odation should contact the Office ofAir Resources at TCDD (401) 222-6800or (401) 222-2808 at least three business days prior to the hearing. Signed tliis 4d day o/July 2008 Stepben Majkut, Chief Offide ofAir Resources