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Per Patrick Burton, Environmental Manager,Indiana Department of EnvironmentalManagement, “Blasting Activities” are notspecifically regulated under the Indiana AirPollution Controlrules.
“However, dust generated as a result of blastingmust not visibly cross the property line at ornear ground level...”
Per 326 IAC 6-4-1: Fugitive dust means the generation of particulate matter to the extent that some portion of the material escapes beyond the property line or boundaries of the
property, right-of-way, oreasement on which the source is located.
Per 326 IAC 6-4-2: A source or sourcesgenerating fugitive dust shall be in violation ofthe code (326 IAC 6-4) if ANY of the following 4criteria are violated…
The fourth criteria reads: If fugitive dust is visible crossing the boundary or property line of a source. This subdivision may be refuted by FACTUAL data expressed in subdivisions (1), (2) or (3) in this section:
Basically, it requires a 50% or 67% increase inthe dust particles from an upstream airmonitoring receptor site, or an increase of 50micrograms per cubic meter of dust over a sixtyminute period.
What about the dust from the day-to- day operation of the quarry?
This is covered under 326 IAC 2-9-8 – (Crushed Stone Processing Plants)
The rule is broken down into 3 levels of crushedstone throughput annually.
1) 800 million pounds and under.
2) Two billion pounds and less
3) Those plants processing over six billionpounds of stone per year.
Additional restrictions are placed on the number of crushers, screens and conveying equipment but this information is NOT known for our
proposed quarry as no air permits have been requested as of this time.
1) Must maintain records for pounds throughput annually.
2) Crushing, screening and conveying operationsshall be equipped with dust collectors, unless awet process or continuous wet suppressionsystem is used.
3) Visible emissions from the screening andconveying shall not exceed an average of 10%opacity in 24 readings in a 6 minute period.
4) Visible emissions from the crushing operationshall not exceed15% opacity undersame timing.
5) Storage Piles can not exceed 20% opacity except in strong winds.
6) Unpaved roads can not exceed 20% opacity in24 consecutive readings in a 6 minute period.
The EPA has a 19-page document onequipment and filters which are to be used tocheck opacity.
I also found a 64 page document telling howto read clouds. This was from a technical schoolthat offered independent certification.
Fugitive particulate emissions at a crushed stone plant shall not escape beyond the property line or boundaries of the property, right-of-way, or
easement where the sources are located.
• The IDEM contact is:
BECKY HAYES
IDEM OFFICER OF AIR QUALITY
COMPLIANCE AND ENFORCEMENT BRANCH
317-233-0033 (DIRECT LINE)
