PLACER COUNTY AIR POLLUTION CONTROL DISTRICT
RULE 406 - COMBINATION OF EMISSIONS
(Adopted 11/12/74; Revised 05/24/77)
A. If air contaminants from two or more source operations are combined prior to emission and there are adequate and reliable means reasonably susceptible for confirmation and use by the Air Pollution Control District in establishing a separation of the components of the combined emission to indicate the nature, extent, quantity and degree of emission from each such source operation, the Rules and Regulations shall apply to each such source operation separately. B. If air contaminants from two or more source operations are combined prior to emission and the combined emissions cannot be separated according to the requirements of RULE 406 A., the Rules and Regulations shall be applied to the combined emissions as if it originated in a single source operation subject to the most stringent limitations and requirements placed by the Rules and Regulations of any of the source operations whose air contaminants are so combined.