Section 326IAC1-2-52.4. "PM10" defined  


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  •   4. "PM10" means any particulate matter with an aerodynamic diameter less than or equal to a nominal ten (10) micrometers (μm) as measured by an applicable reference method specified in 40 CFR Part 50 or by an equivalent or alternative method approved by the commissioner. (Air Pollution Control Division; 326 IAC 1-2-52.4; filed Dec 20, 2004, 2:15 p.m.: 28 IR 1471)