35 Ill. Adm. Code 215.143
Vapor Blowdown
Section 215
Section 215.143 Vapor
Blowdown
No person shall cause or allow
the emission of organic material into the atmosphere from any vapor blowdown
system or any safety relief valve, except such safety relief valves not capable
of causing an excessive release, unless such emission is controlled:
a) To 10 ppm equivalent methane (molecular weight 16.0) or less;
or,
b) By combustion in a smokeless flare; or,
c) By other air pollution control equipment approved by the
Agency according to the provisions of 35 Ill. Adm. Code 201.