MOJAQMD RULE 909 STD. FOR PETROLEUM REFINERIES          
LAST REVISED 12/03/76

          
          (Adopted: December 3, 1976)

                                       Rule 909
                             Standard of Performance for
                                 Petroleum Refineries


          (a)  Definitions

               (1)  COKE  BURN-OFF  means the coke removed from the surface
                    of  the  fluid  catalytic  cracking  unit  catalyst  by
                    combustion in the  catalyst  regenerator.   The rate of
                    coke burn-off is calculated by the formula specified in
                    40 CFR 60.106 (March 8, 1974).

               (2)  FUEL  GAS  means  any  gas  which  is  generated  by  a
                    petroleum refinery process unit and which is combusted,
                    including  any  gaseous mixture of natural gas and fuel
                    gas which is combusted.

               (3)  FUEL GAS COMBUSTION  DEVICE means any equipment such as
                    process heaters, boilers  and  flares  used  to combust
                    fuel  gas,  but does not include fluid coking unit  and
                    fluid catalytic  cracking  unit  incinerator-waste heat
                    boilers or facilities in which gases  are  combusted to
                    produce sulfur or sulfuric acid.

               (4)  PETROLEUM  means  the crude oil removed from the  earth
                    and the oils derived from tar, sand, shale, and coal.

               (5)  PETROLEUM  REFINERY   means  any  facility  engaged  in
                    producing  gasoline, kerosene,  distillate  fuel  oils,
                    residual  fuel  oils,  lubricants,  or  other  products
                    through   distillation    of   petroleum   or   through
                    redistillation,  cracking or  reforming  of  unfinished
                    petroleum derivates.

               (6)  PROCESS GAS means  any  gas  generated  by  a petroleum
                    refinery  process  unit,  except  fuel  gas and process
                    upset gas as defined in these definitions.

               (7)  PROCESS  UPSET  GAS  means  any  gas  generated   by  a
                    petroleum  refinery  process unit as a result of start-
                    up, shut-down, upset or malfunction.

               (8)  REFINERY  PROCESS  UNIT   means   any  segment  of  the
                    petroleum  refinery  in  which  a  specific  processing
                    operation is conducted.

          (b)  Emission Standard

               This  rule applies to the following affected  facilities  in
               petroleum   refineries:    Fluid   catalytic  cracking  unit
               catalyst   regenerators,  fluid  catalytic   cracking   unit
               incinerator-waste  heat  boilers,  and  fuel  gas combustion
               devices, the construction, modification or reconstruction of
               which commenced after June 11, 1973.

               (1)  On  and  after  the date on which the performance  test
                    required  to  be  conducted   by  Rule  902  (b)(1)  is
                    completed, no owner or operator  of  a facility subject
                    to  the  provisions  of  this  rule shall cause  to  be
                    discharged into the atmosphere:

                    (A)  From  any fluid catalytic cracking  unit  catalyst
                         regenerator  or  from any fluid catalytic cracking
                         unit incinerator-waste heat boiler:

                         (i)  Particulate   matter   in   excess   of   1.0
                              kilograms/1000 kilograms (1.0 lb/100 lbs.) of
                              coke burn-off in the catalyst regenerator.

                         (ii) Gases which exhibit  30  percent  opacity  or
                              greater,  except for three minutes in any one
                              hour.

                         (iii)In those instances  in which auxiliary liquid
                              or solid fossil fuels are burned in the fluid
                              catalytic  cracking  unit   incinerator-waste
                              heat boiler, particulate matter  in excess of
                              that  permitted by subparagraph (1)(A)(i)  of
                              this rule  may  be  emitted to the atmosphere
                              except   that   the   incremental   rate   of
                              particulate emissions shall  not  exceed 0.18
                              grams  per  million  calories (0.10 lbs.  per
                              million B.T.U.) of heat input attributable to
                              such liquid or solid fuel.

                    (B)  From  the fluid catalytic cracking  unit  catalyst
                         regenerator   any   gases   which  contain  carbon
                         monoxide in excess of 0.050 percent by volume.

               (2)  (A)  On  and  after the date on which  the  performance
                         test required  to  be conducted by Rule 902 (b)(1)
                         is completed, no owner  or operator subject to the
                         provisions of this rule shall burn in any fuel gas
                         combustion  device  any fuel  gas  which  contains
                         hydrogen sulfide (H2S) in excess of 230 milligrams
                         per dry standard cubic  meter (0.10 grains per dry
                         standard cubic foot), except  as  provided in sub-
                         paragraph  (B) of this paragraph.  The  combustion
                         of process upset gas in a flare, or the combustion
                         in a flare of  process  gas  or  fuel gas which is
                         released to the flare as a result  of relief valve
                         leakage, is exempt from this paragraph.

                    (B)  The owner or operator may elect to treat the gases
                         resulting  from the combustion of fuel  gas  in  a
                         manner which  limits the release of sulfur dioxide
                         (SO2) to the atmosphere  if  it  is  shown  to the
                         satisfaction  of  the  control  officer  that this
                         prevents   SO2   emissions   as   effectively   as
                         compliance  with the requirements of paragraph (A)
                         of this section.

          (c)  Monitoring

               (1)  The owner or operator of any petroleum refinery subject
                    to  the  provisions  of  this  subpart  shall  install,
                    calibrate, maintain, and operate monitoring instruments
                    as follows:

                    (A)  A photoelectric  or  other type smoke detector and
                         recorder to continuously  monitor  and  record the
                         opacity  of  gases  discharged into the atmosphere
                         from the fluid catalytic  cracking  unit  catalyst
                         regenerator.

                    (B)  Reserved - Carbon monoxide monitoring.

                    (C)  Reserved - Hydrogen sulfide monitoring.

                    (D)  An  instrument  for  continuously  monitoring  and
                         recording  concentrations  of  SO2  in  the  gases
                         discharged into the atmosphere from the combustion
                         of fuel gases except where a continuous monitoring
                         system  for  the  measurement  of H2S is installed
                         under paragraph (C) of this section.

               (2)  Monitoring  instruments and sampling systems  installed
                    and used pursuant  to  this section shall be subject to
                    the requirements and performance  specifications  in 40
                    CFR 60.13, 40 CFR 60.105, and 40 CRF 60 Appendix B.

               (3)  The  average  coke burn-off rate and hours of operation
                    for  any  fluid  catalytic   cracking   unit   catalyst
                    regenerator  subject to paragraphs (1)(A) or (1)(B)  of
                    the emission standard shall be recorded daily.

               (4)  For  any  fluid   catalytic   cracking   unit  catalyst
                    regenerator which is subject to paragraph (1)(A) of the
                    emission  standard  and  which utilizes an incinerator-
                    waste heat boiler to combust the exhaust gases from the
                    catalyst  regenerator,  the  owner  or  operator  shall
                    record daily the rate of  combustion of liquid or solid
                    fossil fuels and the hours  of  operation  during which
                    liquid  or  solid  fossil  fuels  are combusted in  the
                    incinerator-waste heat boiler.
               (5)  For the purpose of reports required  pursuant  to  Rule
                    902(a)  periods  of  excess  emissions  that  shall  be
                    reported are defined as follows:

                    (A)  Reserved - Opacity

                    (B)  Reserved - Carbon monoxide

                    (C)  Reserved - Hydrogen sulfide

                    (D)  Sulfur  dioxide - Any six hour period during which
                         the average  emissions  (arithmetic average of six
                         contiguous one-hour periods)  of sulfur dioxide as
                         measured by a continuous monitoring  system exceed
                         the applicable emission standard.

          (d)  Testing Procedure

               Emissions shall be tested according to the methods specified
               by the Air Pollution Control Officer.