TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE B: AIR POLLUTION
CHAPTER I: POLLUTION CONTROL BOARD
SUBCHAPTER c: EMISSION STANDARDS AND LIMITATIONS FOR STATIONARY SOURCES
PART 211 DEFINITIONS AND GENERAL PROVISIONS
SECTION 211.4530 PARTS PER MILLION (VOLUME) OR PPM (VOL)
SUBTITLE B: AIR POLLUTION
CHAPTER I: POLLUTION CONTROL BOARD
SUBCHAPTER c: EMISSION STANDARDS AND LIMITATIONS FOR STATIONARY SOURCES
PART 211 DEFINITIONS AND GENERAL PROVISIONS
SECTION 211.4530 PARTS PER MILLION (VOLUME) OR PPM (VOL)
Section 211.4530 Parts Per Million (Volume) or PPM (Vol)
"Parts per million (volume)" or "PPM (vol)" means a volume/volume ratio which expresses the volumetric concentration of gaseous air contaminant in a million unit volume of gas.
(Source: Added at 17 Ill. Reg. 16504, effective September 27, 1993)