SDAPCD RULE X-GG STDS.OF PERF.FOR STATIONARY GAS TURBINES           
LAST REVISED 05/24/82

           
           SUBPART GG - Standards of Performance for Stationary Gas Turbines
                        (Delegation Effective May 24, 1982)


                RULE 260.330.    APPLICABILITY AND DESIGNATION OF AFFECTED
                                 FACILITY

                The provisions of this subpart are applicable to the following
           affected facilities: all stationary gas turbines with a heat input 
           at peak load equal to or greater than 10.7 gigajoules per hour, 
           based on the lower heating value of the fuel fired, that are 
           constructed, modified or reconstructed after October 2, 1977.


                RULE 260.331.    DEFINITIONS   (Rev. Effective 11/24/82)

                As used in this subpart, all terms not defined herein shall 
           have the meaning given them in the Act and in Subpart A of this 
           Regulation.  

                (a)   "Stationary Gas Turbine" means any simple cycle gas 
           turbine, regenerative cycle gas turbine or any gas turbine portion 
           of a combined cycle steam/electric generating system that is not 
           self-propelled.  It may, however, be mounted on a vehicle for 
           portability.

                (b)   "Simple Cycle Gas Turbine" means any stationary gas 
           turbine which does not recover heat from the gas turbine exhaust 
           gases to preheat the inlet combustion air to the gas turbine, or 
           which does not recover heat from the gas turbine exhaust gases to 
           heat water or generate steam.

                (c)   "Regenerative Cycle Gas Turbine" means any stationary 
           gas turbine that recovers thermal energy from the gas turbine 
           exhaust gases and utilizes the thermal energy to preheat air prior 
           to entering the combustors.  (Rev. Effective 11/24/82)

                (d)   "Combined Cycle Gas Turbine" means any stationary gas
           turbine which recovers heat from the gas turbine exhaust gases to 
           heat water or generate steam.

                (e)   "Emergency Gas Turbine" means any stationary gas turbine
           which operates as a mechanical or electrical power source only when the
           primary power source for a facility has been rendered inoperable by an
           emergency situation.

                (f)   "Ice Fog" means an atmospheric suspension of highly
           reflective ice crystals.

                (g)   "ISO Standard Day Conditions" means 288 degrees Kelvin, 
           60 percent relative humidity and 101.3 kilopascals pressure.

                (h)   "Efficiency" means the gas turbine manufacturer's rated 
           heat rate at peak load in terms of heat input per unit of power 
           output based on the lower heating value of the fuel.

                (i)   "Peak Load" means 100 percent of the manufacturer's 
           design capacity of the gas turbine at ISO standard day conditions.

                (j)   "Base Load" means the load level at which a gas turbine 
           is normally operated.

                (k)   "Fire-Fighting Turbine" means any stationary gas turbine
           that is used solely to pump water for extinguishing fires.

                (l)   "Turbines Employed in Oil/Gas Production or Oil/Gas
           Transportation" means any stationary gas turbine used to provide 
           power to extract crude oil/natural gas from the earth or to move 
           crude oil/natural gas, or products refined from these substances 
           through pipelines.

                (m)   [Reserved] (Rev.  Effective 11/24/82)

                (n)   "Offshore Platform Gas Turbines" means any stationary 
           gas turbine located on a platform in an ocean.

                (o)   "Garrison Facility" means any permanent military
           installation.

                (p)   "Gas Turbine Model" means a group of gas turbines having 
           the same nominal air flow, combustor inlet pressure, combustor 
           inlet temperature, firing temperature, turbine inlet temperature 
           and turbine inlet pressure.

                (q)   "Electric Utility Stationary Gas Turbine" means any
           stationary gas turbine constructed for the purpose of supplying 
           more than one-third of its potential electric output capacity to 
           any utility power distribution system for sale. 
           (Effective 11/24/82)

                (r)   "Emergency Fuel" is fuel fired by a gas turbine only 
           during circumstances, such as natural gas supply curtailment or 
           breakdown of delivery system, that make it impossible to fire 
           natural gas in the gas turbine.  (Effective 11/24/82)


                RULE 260.332.    STANDARD FOR NITROGEN OXIDES
                                 (Rev. Effective 11/24/82)

                (a)   On and after the date on which the performance test 
           required by Rule 260.8 is completed, every owner or operator 
           subject to the provisions of this subpart, as specified in Sections 
           (b), (c), and (d) of this rule, shall comply with one of the 
           following, except as provided in Sections (e), (f), (g), (h), (i), 
           (j), (k), and (l) of this rule.  (Rev. Effective 11/24/82)

                      (1)  No owner or operator subject to the provisions of 
                this subpart shall cause to be discharged into the atmosphere 
                from any stationary gas turbine, any gases which contain 
                nitrogen oxides in excess of:

                           STD = 0.0075  (14.4) + F
                                         ------
                                           Y

                where:

                STD   =    allowable NOx emissions (percent by volume at 15
                           percent oxygen and on a dry basis).

                Y     =    manufacturer's rated heat rate at manufacturer's 
                           rated load (kilojoules per watt hour) or, actual 
                           measured heat rate based on lower heating value of 
                           fuel as measured at actual peak load for the 
                           facility.  The value of Y shall not exceed 14.4 
                           kilojoules per watt hour.

                F     =    NOx emission allowance for fuel-bound nitrogen as
                           defined in Subsection (3) of this section.

                      (2)  No owner or operator subject to the provisions of 
                this subpart shall cause to be discharged into the atmosphere 
                from any stationary gas turbine, any gases which contain 
                nitrogen oxides in excess of:

                                      STD = 0.0150  (14.4)  +  F
                                                    ------
                                                      Y

                where:

                STD   =    Allowable NOx emissions (percent by volume at 15
                           percent oxygen and on a dry basis).

                Y     =    manufacturer's rated heat rate at manufacturer's 
                           rated peak load (kilojoules per watt hour), or 
                           actual measured heat rate based on lower heating 
                           value of fuel as measured at actual peak load for 
                           the facility.  The value of Y shall not exceed 14.4 
                           kilojoules per watt hour.

                F     =    NOx emission allowance for fuel-bound nitrogen as
                           defined in Subsection (3)  of this section.

                      (3)  F shall be defined according to the nitrogen 
                content of the fuel as follows:

                              Fuel-Bound Nitrogen              F
                              (percent by weight)     (NOx percent by volume)
                                         N < 0.015             0
                                 0.015 < N < 0.1               0.04   (N)
                                   0.1 < N < 0.25      0.004 + 0.0067 (N-0.1)
                                         N > 0.25              0.005
           where:

                N =  the nitrogen content of the fuel (percent by weight)

           or:

                Manufacturers may develop custom fuel-bound nitrogen 
           allowances for each gas turbine model they manufacture.  These 
           fuel-bound nitrogen allowances shall be substantiated with data and 
           must be approved for use by the Administrator before the initial 
           performance test required by Rule 260.8.  Notices of approval of 
           custom fuel-bound nitrogen allowances will be published in the 
           Federal Register.

                (b)   Electric utility stationary gas turbines with a heat 
           input at peak load greater than 107.2 gigajoules per hour (100 
           million Btu/hour) based on the lower heating value of the fuel 
           fired shall comply with the provisions of Rule 260.332 (a)(1). 
           (Rev. Effective 11/24/82)

                (c)   Stationary gas turbines with a heat input at peak load 
           equal to or greater than 10.7 gigajoules per hour (10 million 
           Btu/hour) but less than or equal to 107.2 gigajoules per hour (100 
           million Btu/hour) based on the lower heating value of the fuel 
           fired, shall comply with the provisions of Rule 260.332(a)(2).

                (d)   Stationary gas turbines with a manufacturer's rated base
           load at ISO conditions of 30 megawatts or less except as provided 
           in Section (b) shall comply with Subsection (a)(2) of this rule.  
           (Rev. Effective 11/24/82)

                (e)   Stationary gas turbines with a heat input at peak load 
           equal to or greater than 10.7 gigajoules per hour (10 million 
           Btu/hour) but less than or equal to 107.2 gigajoules per hour (100 
           million Btu/hour) based on the lower heating value of the fuel 
           fired and that have commenced construction prior to October 3, 
           1982 are exempt from Section (a) of this rule.

                (f)   Stationary gas turbines using water or steam injection 
           for control of NOx emissions are exempt from Section (a) when ice 
           fog is deemed a traffic hazard by the owner or operator of the gas 
           turbine.

                (g)   Emergency gas turbines, military gas turbines for use in
           other than a garrison facility, military gas turbines installed for 
           use as military training facilities, and fire fighting gas turbines 
           are exempt from Section (a) of this rule.

                (h)   Stationary gas turbines engaged by manufacturers in 
           research and development of equipment for both gas turbine emission 
           control techniques and gas turbine efficiency improvements are 
           exempt from Section (a) on a case-by-case basis as determined by 
           the Administrator.

                (i)   Exemptions from the requirements of Section (a) of this 
           rule will be granted on a case-by-case basis as determined by the
           Administrator in specific geographical areas where mandatory water
           restrictions are required by governmental agencies because of 
           drought conditions.  These exemptions will be allowed only while 
           the mandatory water restrictions are in effect.

                (j)   Stationary gas turbines with a heat input at peak load
           greater than 107.2 gigajoules per hour that commenced construction,
           modification, or reconstruction between the dates of October 3, 
           1977, and January 27, 1982 and were required in the September 10, 
           1979, Federal Register (44 FR 52792) to comply with Rule 260.332
           (a)(1), except electric utility stationary gas turbines, are exempt 
           from Section (a) of this rule.  (Effective 11/24/82)

                (k)   Stationary gas turbines with a heat input greater than 
           or equal to 10.7 gigajoules per hour (10 million Btu/hour) when 
           fired with natural gas are exempt from Subsection (a)(2) of this 
           rule when being fired with an emergency fuel. (Effective 11/24/82)

                (l)   Regenerative cycle gas turbines with a heat input less 
           than or equal to 107.2 gigajoules per hour (100 million Btu/hour) 
           are exempt from Section (a) of this rule.   (Effective 11/24/82)


                RULE 260.333.    STANDARD FOR SULFUR DIOXIDE

                On and after the date on which the performance test required 
           to be conducted by Rule 260.8 is completed, every owner or operator 
           subject to the provision of this subpart shall comply with one or 
           the other of the following conditions:

                (a)   No owner or operator subject to the provisions of this
           subpart shall cause to be discharged into the atmosphere from any
           stationary gas turbine any gases which contain sulfur dioxide in 
           excess of 0.015 percent by volume at 15 percent oxygen and on a 
           dry basis.

                (b)   No owner or operator subject to the provisions of this
           subpart shall burn in any stationary gas turbine any fuel which
           contains sulfur in excess of 0.8 percent by weight.


                RULE 260.334.    MONITORING OF OPERATIONS

                Monitoring requirements shall be those specified in Part 60,
           Chapter I, Title 40, Code of Federal Regulations, Section 60.334.


                RULE 260.335.    TEST METHODS AND PROCEDURES

                Performance tests shall be conducted as specified in Part 60,
           Chapter I, Title 40, Code of Federal Regulations, Section 60.335.