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  • Notice of Proposed Rulemaking: ADEQ Regional Haze Program

    Jun 27, 2022 | Read More News
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    Under the Clean Air Act, Arizona Department of Environmental Quality (ADEQ) is required to periodically evaluate and identify viable control strategies and implement those strategies to reduce emissions that cause “Regional Haze” at Class I National Parks and Wilderness Areas.

    In Pima County, the Class I areas are the Saguaro East and Saguaro West Monuments.  The 2022 Regional Haze State Implementation Plan (RH SIP), currently in public notice on ADEQ’s website, contains the completed control analysis of nonpoint sources and contains the selected four potential control options resulting from their evaluation.  Two of the control options proposed are for public paved roads and the other two control options proposed are for nonresidential construction.  ADEQ has determined these 4 potential control strategies based upon: 

    1) Cost of the controls 
    2) Time necessary to implant the controls 
    3) Non-air quality impacts caused by the controls (for example, additional water usage for dust controls in a drought) 
    4) Useful life of the controls 

    In addition to the RH SIP, ADEQ has prepared potential non-point draft/”strawman” rules  that would incorporate the proposed 4 control strategies identified in the RH SIP.  The “strawman” rules were presented at a stakeholder meeting on May 26, 2022.  The presentation and “strawman” rules can be accessed at the ADEQ Website link below.  ADEQ is currently accepting comments and or questions on the “strawman” rules. 

    ADEQ will finalize the selected control measures by this fall and begin state rulemaking. The rules will be submitted to EPA for federal enforceability.  As the Pima County Air Quality Control District, PDEQ may be required to adopt the controls and strategies in the state plan into Pima County Code.   

    As this ADEQ process will result in additional enforceable dust control requirements, it is important to provide ADEQ with written input on their analyses of the costs and practicality of these controls presented in their 2022 RH SIP.  Specific ADEQ contacts are listed in each document. 

    ADEQ is looking for feedback on the RH SIP by July 14, 2022. 

    Please click on the following link to the ADEQ webpage for more detailed information: