LAST REVISED 01/01/89          
          RULE 4.4  Specific Air Contaminants

          No person shall discharge from any single source whatsoever any
          one  or  more  of  the  following  contaminants  in  any state or
          combination thereof, exceeding in concentration at the  point  of

          A. Sulfur  compounds calculated as sulfur dioxide 0.2 percent, by

          B. Combustion contaminants

             1. Any source  with an approved permit to operate or authority
                to construct as of July 1, 1987: 0.30 grains per cubic foot
                of exhaust gas,  calculated to 12 percent carbon dioxide at
                standard conditions.

             2. Any source with an  approved  authority  to construct after
                July 1, 1987:  0.20 grains per cubic foot  of  exhaust  gas
                calculated  to  12  percent  carbon  dioxide,  at  standard

             3. In  measuring the combustion contaminants from incinerators
                used  to  dispose  of  combustible  refuse  by burning, the
                carbon  dioxide  produced  by combustion of any  liquid  or
                gaseous fuels shall be excluded  from the calculation to 12
                percent of carbon dioxide.

          C. Fluorine compounds emissions shall not  exceed  2.5 milligrams
             per cubic meter of exhaust gas at standard conditions.

          D. Oxides  of  nitrogen  no  person  shall  discharge  oxides  of
             nitrogen in excess of 140 pounds per hour for new or  expanded
             installations, calculated as nitrogen dioxide (NO2).

          All  emissions  shall  be  measured  by  methods as designated in
          Article  2,  Subchapter 8,  Chapter  1,  Part  III,   Title   17,
          California  Code of Regulations or equivalent methods approved by
          the Control Officer.

                                      * * * * *