SACAQMD RULE 413 STATIONARY GAS TURBINES                    
LAST REVISED 04/06/95




                    RULE 413 - Stationary Gas Turbines
                             Adopted 04-06-95

                                   INDEX


100 GENERAL
    101  PURPOSE
    102  APPLICABILITY
    110  EXEMPTION - EMERGENCY STANDBY UNITS 
    111  EXEMPTION - REMOVAL FROM SERVICE
    112  EXEMPTION - LABORATORY UNITS 
    113  EXEMPTION - STARTUP/SHUTDOWN PERIOD

200 DEFINITIONS
    201  BEST AVAILABLE RETROFIT CONTROL TECHNOLOGY (BARCT)
    202  CONTROL SYSTEM OPERATING PARAMETERS
    203  EMERGENCY STANDBY UNIT
    204  MAINTENANCE OPERATION
    205  PEAK LOAD
    206  POWER AUGMENTATION
    207  RATING
    208  REASONABLY AVAILABLE CONTROL TECHNOLOGY (RACT)
    209  RETROFITTING
    210  SELECTIVE CATALYTIC REDUCTION (SCR)
    211  STATIONARY GAS TURBINE OR UNIT
    212  STATIONARY SOURCE

300 STANDARDS
    301  RACT  EMISSION LIMITS
    302  BARCT EMISSION LIMITS
    303  EQUIPMENT REQUIREMENTS

400 ADMINISTRATIVE REQUIREMENTS
    401  COMPLIANCE SCHEDULE
    402  COMPLIANCE PLAN

500 MONITORING AND RECORDS
    501  MONITORING
    502  RECORDKEEPING
    503  TEST METHODS


100 GENERAL

    101  PURPOSE:  To limit emissions of nitrogen oxides (NOx) to
         the atmosphere from the operation of stationary gas
         turbines.

    102  APPLICABILITY:  This rule applies to all stationary gas
         turbines with ratings equal to or greater than 0.3
         megawatt (MW) output, or 3 MMBTU/hr input and operated on
         gaseous and/or liquid fuel.

    110  EXEMPTION - EMERGENCY STANDBY UNITS:  The provisions of
         Sections 301 and 302 shall not apply to the operation of
         gas turbines used for emergency standby. 

    111  EXEMPTION - REMOVAL FROM SERVICE:  The provisions of
         Sections 301 and 302 shall not apply to any unit that
         will be removed from service prior to May 31, 1997
         provided that the owner or operator complies with  the
         requirements specified in Section 401.4.

    112  EXEMPTION - LABORATORY UNITS:  The provisions of Sections
         301 and 302 shall not apply to laboratory gas turbine
         units used in research and testing for the advancement of
         gas turbine technology.

    113  EXEMPTION - STARTUP/SHUTDOWN PERIOD:  The provisions of
         Sections 301 and 302 shall not apply to the period of
         time for the purpose of startup and shutdown of a gas
         turbine.  This period is not to exceed one hour for
         startup and one hour for shutdown.

200 DEFINITIONS

    201  BEST AVAILABLE RETROFIT CONTROL TECHNOLOGY (BARCT):  Best
         Available Retrofit Control Technology, as defined in
         Section 40406 of the California Health and Safety Code,
         is "an emission limitation that is based on the maximum
         degree of reduction achievable, taking into account
         environmental, energy, and economic impacts by each class
         or category of sources." These limits are specified in
         Section 302.

    202  CONTROL SYSTEM OPERATING PARAMETERS:  The operating
         parameters that the Air Pollution Control Officer deems
         necessary to analyze when determining compliance,
         including, but not limited to, ammonia and  exhaust gas
         flow rates, the exhaust gas temperature, and the water or
         steam injection rate.

    203  EMERGENCY STANDBY UNIT:  Any gas turbine unit which has
         one hundred (100) or fewer hours per year of maintenance
         operation and that provides emergency:
         203.1     Electrical power during interruptions of
                   electrical power by an unforeseeable event, 
         203.2     Water pumping for flood control, and/or
         203.3     Water pumping for fire control.
         Electricity generated by the unit cannot be sold.

    204  MAINTENANCE OPERATION:  The use of an emergency standby
         unit and fuel system during testing, repair and routine
         maintenance to verify its readiness for emergency standby
         use.

    205  PEAK LOAD:  Means 100 percent of the manufacturer's
         design capacity of the gas turbine.

    206  POWER AUGMENTATION:  Any increase in the gas turbine
         shaft output and/or decrease in gas  turbine fuel
         consumption by the addition of energy recovered from
         exhaust heat.

    207  RATING:  The continuous megawatt (MW) rating or
         mechanical equivalent specified by a manufacturer for a
         gas turbine without power augmentation.

    208  REASONABLY AVAILABLE CONTROL TECHNOLOGY (RACT): 
         Reasonably Available Control Technology means "the lowest
         emission limitation that a unit is capable of meeting by
         the application of control technology that is reasonably
         available considering technological and economic
         feasibility," as specified in Section 301.

    209  RETROFITTING:  Any physical change to an emissions unit
         necessary for reducing NOx emissions to comply with the
         NOx emissions limits specified in Sections 301 through
         302 of this rule, including, but not limited to, burner
         replacement, and the addition of emissions control
         equipment.  Changes in the method of operation is not
         considered to be  retrofitting.

    210  SELECTIVE CATALYTIC REDUCTION (SCR):  Selective Catalytic
         Reduction is a postcombustion NOx control technique.  A
         reducing agent (for example: ammonia) is used in a gas-
         phase reaction with oxides of nitrogen in the presence of
         a catalyst to form nitrogen and water. 

    211  STATIONARY GAS TURBINE OR UNIT:  Any gas turbine that
         remains or will remain at a stationary source for:
         211.1     more than 12 consecutive months.  Any gas
                   turbine that replaces a gas turbine at a
                   stationary source and is intended to perform
                   the same function as the gas turbine being
                   replaced will be included in calculation the
                   consecutive time period.  In that case, the
                   cumulative time of both gas turbines,
                   including the time between the removal of the
                   original gas turbine and installation of the
                   replacement gas turbine, would be counted
                   toward the consecutive residence time period:
                   or
         211.2     less than 12 consecutive months where such a
                   period represents the full length of normal
                   annual source operations, such as a seasonal
                   source.
    
    212  STATIONARY SOURCE:  Any building, structure, facility, or
         installation which emits or may emit any affected
         pollutant directly or as a fugitive emission.
         212.1     Building, structure, facility, or emissions
                   unit includes all pollutant emitting
                   activities which:
              a.   belong to the same industrial grouping, and
              b.   are located on one property or on two or more
                   contiguous properties, and 
              c.   are under the same or common ownership,
                   operation, or control or which are owned or
                   operated by entities which are under common
                   control.
         212.2     Pollutant emitting activities shall be
                   considered as part of the same industrial
                   grouping if:
              a.   they belong to the same two-digit standard
                   industrial classification code, or
              b.   they are part of a common production process.
                   (Common production process includes industrial
                   processes, manufacturing processes and any
                   connected processes involving a common
                   material.)
         
300 STANDARDS

    301  RACT EMISSION LIMITS: 
         301.1     RACT EMISSIONS LIMITS - GASEOUS FUEL FIRING: 
                   The NOx emissions shall not exceed 42 parts
                   per million by volume on a dry basis,
                   corrected to 15 percent oxygen (O2) when firing
                   on gaseous fuels.
         301.2     RACT EMISSIONS LIMITS - LIQUID FUEL FIRING: 
                   The NOx emissions from any unit shall not
                   exceed 65 parts per million by volume on a dry
                   basis, corrected to 15 percent oxygen (O2 )
                   when firing on liquid fuels.

    302  BARCT EMISSION LIMITS:  
         302.1     BARCT EMISSIONS LIMITS - GASEOUS FUEL
                   FIRING:   
              a.   The NOx emissions from any unit with a rated
                   unit size output less than 2.9 MW, or any unit
                   greater than or equal to 2.9 MW operating less
                   than 877 hours per year, shall not exceed 42
                   parts per million by volume on a dry basis,
                   corrected to 15 percent oxygen (O2) when firing
                   on gaseous fuels.
              b.   The NOx emissions from any unit with a rated
                   unit size output greater than 2.9 MW and less
                   than 10 MW shall not exceed 25 parts per
                   million by volume on a dry basis, corrected to
                   15 percent oxygen (O2) when firing on gaseous
                   fuels.
              c.   The NOx emissions from any unit with a rated
                   unit size output greater or equal to 10 MW,
                   without SCR installed, shall not exceed 15
                   parts per million by volume on a dry basis,
                   corrected to 15 percent oxygen (O2) when firing
                   on gaseous fuels.
              d.   The NOx emissions from any unit with a rated
                   unit size output greater or equal to 10 MW,
                   with SCR installed, shall not exceed 9 parts
                   per million by volume on a dry basis,
                   corrected to 15 percent oxygen (O2) when firing
                   on gaseous fuels.
         302.2     BARCT EMISSIONS LIMITS - LIQUID FUEL FIRING:  
              a.   The NOx emissions from any unit with a rated
                   unit size output of less than 10 MW or any
                   unit greater than or equal to 2.9 MW operating
                   less than 877 hours per year, shall not exceed
                   65 parts per million by volume on a dry basis,
                   corrected to 15 percent oxygen (O2) when firing
                   on liquid fuels.
              b.   The NOx emissions from any unit with a rated
                   unit size output greater or equal to 10 MW,
                   without SCR installed, shall not exceed 42
                   parts per million by volume on a dry basis,
                   corrected to 15 percent oxygen (O2) when firing
                   on liquid fuels.
              c.   The NOx emissions from any unit with a rated
                   unit size output greater or equal to 10 MW,
                   with SCR installed, shall not exceed 25 parts
                   per million by volume on a dry basis,
                   corrected to 15 percent oxygen (O2) when firing
                   on liquid fuels.

     Summary of RACT and BARCT requirements of Sections 301 and 302 
     
Requirements       Time of      Unit Size Rating    NOx Emission Limit
                  operation         (MW)                 (ppmv)
                   (hr/yr)
                                                    Gaseous  /  Liquid
                                                          (Fuel)

RACT               any            0.3               42.0         65.0
                                    
BARCT              any        0.3 to <2.9           42.0         65.0
                  <877            2.9               42.0         65.0
                  877        2.9 to <10            25.0         65.0
                  877        10.0 (no SCR)         15.0         42.0
                  877        10.0 (w SCR)           9.0         25.0
                                    
                                      
303  EQUIPMENT REQUIREMENTS:  
                303.1     The owner or operator of any unit with a
                             rated unit size output of less than 10 MW
                             shall install, operate, and maintain in
                             calibration, equipment approved by the
                               Air Pollution Control Officer that
                              continuously measures and records the
                              following:  Control System Operating
                                 Parameters, and Elapsed time of
                                           operation.
                303.2     The owner or operator of any unit with a
                             rated unit size output greater or equal
                             to 10 MW and operated for more than 4000
                             hours in any one calendar year during the
                             three years before April 6, 1995 shall
                                install, operate, and maintain in
                             calibration, equipment approved by the
                               Air Pollution Control Officer that
                              continuously measures and records the
                              following:  Control System Operating
                             Parameters, Elapsed time of operation,
                                 and continuous exhaust gas NOx
                             concentrations corrected to 15 percent
                              oxygen (O2) on a dry basis.  The NOx
                              continuous emission monitoring (CEM)
                                system shall meet requirements as
                             specified in 40 CFR Part 60 Appendix B,
                                        Specification 2. 
               303.3     The owner or operator of any unit subject
                               to any provision of this rule shall
                                install by April 6, 1996, a non-
                             resettable totalizing hour meter on each
                                           turbine.   
                                         
                     400 ADMINISTRATIVE REQUIREMENTS
                                    
                         401  COMPLIANCE SCHEDULE  
                  401.1     RACT EMISSION LIMITS:   The owner or
                              operator of any unit in existence on
                             April 6, 1995, subject to the emission
                             limits of Sections 301.1 and 301.2, shall
                             comply with these limits effective May
                             31, 1995 unless retrofitting is required. 
                             If retrofitting is required to achieve
                             these limits, the owner or operator shall
                             comply with the increments of progress of
                             Section 401.3 and be in compliance with
                             the BARCT limits by the date specified in
                             Section 401.3.  Interim compliance with
                             the limits of Sections 301.1 and 301.2
                             does not exclude that owner or operator
                             from final compliance with the limits of
                                Sections 302.1 and 302.2 and the
                             increments of progress of Section 401.3.
                  401.2     BARCT EMISSION LIMITS:  The owner or
                              operator of any unit in existence on
                             April 6, 1995, subject to the emission
                             limits of Sections 302.1 and 302.2, shall
                             comply with the limits effective May 31,
                             1997 and shall do so in accordance with
                              the increments of progress of Section
                                             401.3.
                 401.3.    INCREMENTS OF PROGRESS:  The owner or
                               operator of any unit subject to the
                             emissions limits of Sections 301 and 302
                                 shall comply with the following
                                     increments of progress:
                        a.   By May 31, 1995, submit to the Air
                             Pollution Control Officer a compliance
                               plan as specified in Section 402. 
                        b.   By January 31, 1996, submit to the Air
                              Pollution Control Officer a complete
                             application for an authority to construct
                             for the modifications necessary to meet
                             the limits of Sections 302.1 and 302.2.
                        c.   By November 30,  1996,  begin
                                          construction.
                        d.   By March 31,  1997, complete
                                          construction.
                        e.   By May 31, 1997, comply with the emission
                             limits of Sections 302.1 and 302.2.  This
                             shall include the submittal to the Air
                             Pollution Control Officer of a complete
                             source test report indicating compliance.
                   401.4     REMOVAL FROM SERVICE: The owner or
                              operator of any unit in existence on
                              April 6, 1995 that is expected to be
                              removed from service by May 31, 1997
                                shall comply with the following:
                        a.   By May 31, 1995, submit to the Air
                             Pollution Control Officer a notification
                                requesting an exemption from the
                              requirements of Sections 301 and 302.
                        b.   By January 31, 1996, submit to the Air
                              Pollution Control Officer a complete
                             application for an Authority to Construct
                                for modification of the Permit to
                                            Operate.
                        c.   By May 31, 1997, discontinue operation of
                              the unit, disconnect the fuel supply
                              line(s), and notify the Air Pollution
                               Control Officer in writing  of the
                              removal from service. Operation of any unit 
                              beyond May 31, 1997, shall be done in 
                              compliance with the applicable NOx limits 
                              in Section 302.
                 401.5     EMERGENCY STANDBY UNITS:  The owner or
                             operator of any unit in existence prior
                             to April 6, 1995 shall, by May 31, 1995,
                               submit to the Air Pollution Control
                              Officer a notification requesting an
                               exemption from the requirements of
                                     Sections 301 and 302. 
                                                   
          402  COMPLIANCE PLAN:  The owner or operator of any unit
                    shall submit, for approval to the Air Pollution
                    Control Officer, a Plan for compliance with the
                   provisions of Section 300.  The plan shall include:
                 402.1     The following information relative to
                             each unit subject to this rule: the name
                             of the manufacturer, model number, rated
                                shaft power output (MW), hours of
                                 operation, fuel type, and fuel
                              consumption rate (MCF/hr or gal/hr).
                402.2     A description of the NOx control system
                             proposed for each unit, including type
                                and manufacturer, as well as the
                               measurement and recording equipment
                              required in Section 303.  Data on the
                             expected performance of the NOx control
                                 system shall also be included.
                  402.3     A compliance schedule for each unit,
                             including, but not limited to, specific
                             dates for the following events:  final
                              engineering, contract award, starting
                             date of construction, completion date of
                               construction, and the date of final
                                           compliance.
                                         
500 MONITORING AND RECORDS
                                    
             501  MONITORING:  The owner or operator of any unit
                   subject to the requirements  of Sections 301 and
                    302 shall test the unit annually using the test
                           methods specified in Section 503.
                                    
                            502  RECORDKEEPING:  
               502.1     The owner or operator of any unit subject
                              to the provisions of this rule shall
                             maintain an operation record containing,
                                at a minimum, the following data:
                        a.   Permit number of each gas turbine.
                     b.   Manufacturer, model number and rating in
                                 megawatts of each gas turbine.
                     c.   Actual startup and shutdown time, daily
                             hours of operation, and cumulative hours
                              of operation to date for the calendar
                                              year.
                      d.   Actual daily fuel usage of each unit.
                     e.   Date and results of most recent emission
                             test reported as ppmv @ 15% O2 and pound
                                         per unit time.
                      f.   A summary of any emissions corrective
                                       maintenance taken.
               502.2     The owner or operator of any unit subject
                              to any provisions of this rule shall
                             maintain the operation records for two
                             years.  The records shall be available
                               for inspection by the Air Pollution
                                  Control Officer upon request.
                502.3     The owner or operator of any unit which
                             is exempt per Section 110  shall notify
                             the Air Pollution Control Officer within
                             seven days if the  hour-per-year limit is
                             exceeded.  If the hour-per-year limit is
                                exceeded, the  exemption will be
                             permanently withdrawn. Within 30 days of
                              the exceedance, the owner or operator
                             shall submit a plan to show compliance
                               with the rule within 2 years of the
                               exceedance.  A public service unit
                              operating during a state of emergency
                             shall be excluded from the hour-per-year
                             limit, when such emergency is declared by
                             proclamation of the Governor and when the
                                 unit is located in the specific
                              geographic location identified in the
                                         proclamation.  
                                    
           503  TEST METHODS:  Compliance with the requirements of
                   this rule shall be determined using the following
                                     test methods:
                503.1     Oxides of Nitrogen:  Emissions of oxides
                             of nitrogen shall be determined by using
                             EPA Method 20.  The average of three runs
                             for 15 minutes shall be used to determine
                                         compliance.   
                  503.2     Oxygen (O2) Content:  Oxygen content
                             shall be determined by using ARB Method
                                       100 or EPA Method 3A.