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72. PROPOSED AMENDMENT TO RULE 314 (OPEN OUTDOOR FIRES AND INDOOR FIREPLACES AT COMMERCIAL AND INSTITUTIONAL ESTABLISHMENTS) Pursuant to A.R.S. §49-479(b), set a public hearing for July 25, 2012 to solicit comments and consider the adoption of proposed amendments to Rule 314 (Open Outdoor Fires and Indoor Fireplaces at Commercial and Institutional Establishments) and to submit the amended rule as a revision to the (Arizona) State Implementation Plan (SIP). Upon Board approval, this item will become effective July 25, 2012. The Maricopa County Air Quality Department is proposing to revise Rule 314 (Open Outdoor Fires and Indoor Fireplaces at Commercial and Institutional Establishments) in order to clarify circumstances under which limited testing of potentially explosive-containing products during restricted-burn periods would be allowed. The testing in question was found to emit a trivial amount of particulate matter, however, failure to conduct the testing as scheduled would result in potentially significant negative impacts on the operations and finances of the affected companies. The tests consist of a limited number of discrete events usually lasting mere seconds and releasing minimal particulates. (C-85-12-023-7-00)