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  • Notice of final rulemaking - Ajo

    Feb 19, 2019 | Read More News
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    CHAPTER 17.16 ADDING SECTION 17.16.125

    The Pima County Board of Supervisors (BOS) as the governing body for the Pima County Air Quality Control District adopts ordinances which are codified in the Pima County Code (PCC).  The Pima County Air Quality Control District operates within the Pima County Department of Environmental Quality (PDEQ).  PDEQ periodically proposes updates to PCC through the BOS.  This Notice of Final Rulemaking is for the addition of a new section to PCC Title 17, Chapter 17.16, Section 17.16.125- Inactive Mineral Tailings Impoundment and Slag Storage Area within the Ajo PM10 Planning Area.  The intention of this rulemaking was to meet State Implementation Plan (SIP) requirements to provide permanence and enforceability for control measures that have already been implemented. Under this new section, owners or operators are subject to implement and maintain required Particulate Matter (PM10) control measures on applicable sources to meet visible emissions and stabilization requirements, in order to ensure continued Particulate Matter emissions reductions in the Ajo PM10 Planning Area. The inactive tailings area must be controlled to 20 percent opacity for fugitive emissions on the property. For both the tailings and slag areas, owners or operators must also install and maintain signs and physical barriers to prevent trespass and re‚Äźdisturbance on the property. This rule was adopted by the Pima County Board of Supervisors at the Tuesday, January 22, 2019 BOS Hearing. The effective date of this rule is February 21, 2019.

    Information regarding this Rulemaking may be viewed under the Air tab on the PDEQ Draft, Proposed, & Final Rules website. Copies are also available at our office, or may be requested via e-mail to Sarah Reitmeyer