SISAPCD RULE 4.8 COMBINATION OF EMISSIONS           
LAST REVISED 01/01/89          
          
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          RULE 4.8  Combination of Emissions
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          A. If  air  contaminants  from  two or more source operations are
             combined prior to emission and there are adequate and reliable
             means reasonably susceptible to  confirmation  and  use by the
             Control   Officer   for   establishing  a  separation  of  the
             components of the combined  emission  to  indicate the nature,
             extent, quantity and degree of emission arising from each such
             source  operation, this regulation 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  4.8.A.,
             this regulation shall be applied  to  the combined emission as
             if it originated in a single source operation  subject  to the
             most  stringent  limitations  and  requirements placed by this
             regulation  on  any  of  the  source  operations   whose   air
             contaminants are so combined.

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