35 Ill. Adm. Code 212.304
Storage Piles
Section 212
Section 212.304 Storage
Piles
a) All storage piles of materials with uncontrolled emissions of
fugitive particulate matter in excess of 45.4 Mg per year (50 T/yr) which are
located within a source whose potential particulate emissions from all emission
units exceed 90.8 Mg/yr (100 T/yr) shall be protected by a cover or sprayed
with a surfactant solution or water on a regular basis, as needed, or treated
by an equivalent method, in accordance with the operating program required by
Sections 212.309, 212.310 and 212.312 of this Subpart.
b) Subsection (a) of this Section shall not apply to a specific
storage pile if the owner or operator of that pile proves to the Agency that
fugitive particulate emissions from that pile do not cross the property line
either by direct wind action or reentrainment.