MODOC COUNTY AIR POLLUTION CONTROL DISTRICT
RULE 4.9 - SEPARATION OF EMISSIONS
(Amended January 15. 1989)
If air contaminants from a single source operation are emitted through two or more emission points, the total emitted quantity of any air contaminant limited in this regulation cannot exceed the quantity which would be the allowable emission through a single emission point; and the total emitted quantity of any such air contaminant shall be taken as the product of the highest concentration measured in any of the emission points and the combined exhaust gas volume from all emission points, unless the person responsible for the source operation establishes the correct total emitted quantity.