Carbon monoxide measured at an ambient air monitoring station shall not exceed:
420.11 10 milligrams per cubic meter (9.0 ppm) eight (8) hour average concentration more than once per year at any location where people would be exposed to such concentration for eight (8) hours or more.
420.12 40 milligrams per cubic meter (35.0 ppm) one (1) hour average concentration more than once per year.
Sampling and analysis to determine compliance with this Section shall be as outlined in Section 180 or equivalent as determined by the Control Officer.
AMENDED: October 13, 1982, April 14, 1993