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.