SJVUAPCD RULE 4305 BOLRS, STM GENS AND PROC HTRS
LAST REVISED 03/16/95

RULE 4305 BOILERS, STEAM GENERATORS, AND PROCESS HEATERS (Adopted
          December 16, 1993; Amended March 16, 1995)

1.0  Purpose

     The purpose of this rule is to limit emissions of oxides of
     nitrogen from boilers, steam generators, and process heaters.

2.0  Applicability

     2.1  This rule applies to any gaseous fuel or liquid fuel
          fired boiler, steam generator, or process heater with
          rated heat input greater than 10 million Btu per hour.

     2.2  The requirements of this rule shall not constitute
          applicable State Implementation Plan requirements
          pursuant to section 182(f) of the federal Clean Air Act
          for units located west of Interstate Highway 5 in Fresno,
          Kern, or Kings county. This section does not relieve
          owners/operators from complying with any applicable
          provision of this rule.

3.0  Definitions

     3.1  Annual Heat Input: the total heat input (hhv basis) of
          fuel burned by a unit in a calendar year.

     3.2  Boiler or Steam Generator: any external combustion
          equipment fired with any fuel used to produce hot water
          or steam.

     3.3  British Thermal Unit (Btu): the amount of heat required
          to raise the temperature of one pound of water from 59F
          to 60F at one atmosphere.

     3.4  Gaseous fuel: any fuel which is a gas at standard
          conditions.

     3.5  Heat Input: the heat (hhv basis) released due to fuel
          combustion in a unit, not including the sensible heat of
          incoming combustion air and fuel.

     3.6  Higher Heating Value (hhv): the total heat liberated per
          mass of fuel burned (Btu per pound), when fuel and dry
          air at standard conditions undergo complete combustion
          and all resulting products are brought to their standard
          states at standard conditions.

     3.7  Liquid Fuel: any fuel which is a liquid at standard
          conditions.

     3.8  Natural Draft Unit : a unit  that uses no mechanical
          means to cause air to flow through a combustion chamber,
          flue, chimney or space.

     3.9  NOx Emissions: the sum of oxides of nitrogen expressed as
          NO2 in the flue gas.

     3.10 Process Heater: any combustion equipment fired with
          liquid and/or gaseous fuel and which transfers heat from
          combustion gases to water or process streams.  This
          definition excludes: kilns or ovens used for drying,
          baking, cooking, calcining, or vitrifying; and unfired
          waste heat recovery heaters used to recover sensible heat
          from the exhaust of combustion equipment.

     3.11 Rated Heat Input (million Btu per hour): the heat input
          capacity specified on the nameplate of the unit or as
          limited by District permit.

     3.12 Resource Recovery: a process which converts municipal
          wastes, agricultural wastes, forest wastes, landfill gas,
          or digester gas that were produced in the San Joaquin
          Valley Air Basin, to produce thermal and electrical
          energy.

     3.13 Small Producer:  a person who is engaged exclusively in
          the production of oil, and who produces an average of
          less than 6000 barrels of crude oil per day from all
          operations in any one county within the District, and who
          does not engage in refining, transporting or marketing of
          refined petroleum products. 

     3.14 Solid Fuel: any fuel which is a solid at standard
          conditions.

     3.15 Standard Conditions: standard conditions as defined in
          Rule 1020 (Definitions).

     3.16 Unit: any boiler, steam generator or process heater as
          defined in this rule.

4.0  Exemptions

     4.1  This rule shall not apply to:

          4.1.1     Solid fuel fired units.

          4.1.2     Dryers and glass melting furnaces.

          4.1.3     Kilns and smelters where the products of
                    combustion come into direct contact with the
                    material to be heated.

          4.1.4     Unfired or fired waste heat recovery boilers
                    that are used to recover or augment heat from
                    the exhaust of combustion turbines or internal
                    combustion engines.

          4.1.5     Resource recovery units.


          4.1.6     Natural draft units with rated heat input
                    equal to or less than 40 million Btu per hour.

          4.1.7     Units with annual heat input less than 90
                    billion Btu per year as limited by District
                    permit.

     4.2  The requirements of Section 5.1.2 shall not apply to
          units burning liquid fuel during natural gas curtailment. 
          This exemption is limited to 336 cumulative hours of
          operation per calendar year excluding equipment testing
          not to exceed 48 hours per calendar year.

     4.3  Except for the provisions of Section 6.1.3, this rule
          shall not apply to units operated exclusively in the
          months of November, December, January, or February, and
          operated on all fuels for less than 500 hours during any
          one calendar year.

     4.4  Equipment modified or installed for the purpose of
          complying with the requirements of this rule shall be
          exempt from the requirements of District Rule 2201 (New
          and Modified Stationary Source Review Rule).

5.0  Requirements

     All ppmv emission limits in this Section are referenced to dry
     stack gas conditions, and shall be calculated to 3.00 percent
     by volume stack gas oxygen in accordance with Section 8, and
     averaged over 60 minutes.

     5.1  NOx emissions shall not exceed:

          5.1.1     0.036 pound per million Btu of heat input, or
                    30 ppmv, when operated on gaseous fuel,

          5.1.2     0.052 pound per million Btu of heat input, or
                    40 ppmv, when operated on liquid fuel,

          5.1.3     the heat input weighted average of the limits
                    specified in Sections 5.1.1 and 5.1.2 when
                    operated on combinations of gaseous fuel and
                    liquid  fuel.

     5.2  Carbon monoxide emissions shall not exceed 400 ppmv.

     5.3  Monitoring Provisions

          5.3.1     The owner of any unit which simultaneously
                    fires gaseous and liquid  fuels shall install
                    and maintain totalizing mass or volumetric
                    flow rate meters in each fuel line to each
                    unit.  Volumetric flow rate meters shall be
                    installed in conjunction with temperature and
                    pressure measurement devices.

          5.3.2     The owner of any unit equipped with NOx
                    reduction technology shall operate and 
                    maintain appropriate provisions to monitor the
                    operational characteristics of the NOx
                    reduction technology.

     5.4  Compliance Determination

          5.4.1     The owner of any unit shall have the option of
                    complying with either the heat input basis
                    (lb/MMBtu) emission limits or the
                    concentration (ppmv) emission limits specified
                    in Section 5.1.  The basis selected to
                    demonstrate compliance shall be specified in
                    the source test proposal pursuant to Rule 1081
                    (Source Sampling).

          5.4.2     All emissions measurements shall be made with
                    the unit operating at conditions
                    representative of normal operations.  No
                    determination of compliance with the
                    requirements of Section 5.1 or 5.2 shall be
                    established within two hours after a
                    continuous period in which fuel flow to the
                    unit is shut off for 30 minutes or longer.

6.0  Administrative Requirements

     6.1  Recordkeeping

          6.1.1     The owner of any unit operated under the
                    exemption of Section 4.2 shall monitor and
                    record for each unit the cumulative annual
                    hours of operation on each liquid  fuel during
                    curtailment and during testing.

          6.1.2     Records shall be maintained for two calendar
                    years and shall be made available to the APCO
                    upon request.

          6.1.3     The owner of any unit operated under the
                    exemption of Section 4.3 shall monitor and
                    record for each unit the cumulative annual
                    hours of operation.

     6.2  Test Methods

          6.2.1     Fuel hhv shall be certified by third party
                    fuel supplier or determined by:
                
                    6.2.1.1   ASTM D 240-87 or D 2382-88 for liquid
                              hydrocarbon fuels;
                    6.2.1.2   ASTM D 1826-88 or D 1945-81 in
                              conjunction with ASTM D 3588-89 for
                              gaseous fuels.

          6.2.2     Oxides of nitrogen (ppmv) - EPA Method 7E, or
                    ARB Method 100.
          6.2.3     Carbon monoxide (ppmv) - EPA Method 10, or ARB
                    Method 100
          6.2.4     Stack gas oxygen - EPA Method 3 or 3A, or ARB
                    Method 100.
          6.2.5     NOx Emission Rate (Heat Input Basis) - EPA
                    Method 19.
          6.2.6     Stack gas velocities - EPA Method 2.
          6.2.7     Stack gas moisture content - EPA Method 4.

     6.3  Compliance Testing 

          Each unit subject to the requirements of this rule shall
          be tested to determine compliance with the applicable
          requirements of Section 5.1 and 5.2 not less than once
          every 12 months.  Gaseous fuel fired units demonstrating
          compliance on two consecutive annual source tests shall
          be tested not less than once every thirty-six months.

7.0  Compliance Schedule

     7.1  The owner of any unit subject to this rule shall comply
          with the following increments of progress:

          7.1.1     By June 16, 1995, submit to the APCO a control
                    plan or an Alternative Emission Control Plan,
                    which identifies all units subject to this
                    rule including units exempt under Sections
                    4.1.5, 4.1.6, and 4.3, and which identifies
                    all steps to be taken to achieve compliance
                    with this rule and the construction schedule.

          7.1.2     By June 16, 1995, submit to the APCO a
                    complete application for Authority to
                    Construct for all modifications to each
                    nonexempt unit.

          7.1.3     By June 16, 1996, certify to the APCO that
                    contracts or purchase orders for modifications
                    have been issued.

          7.1.4     By December 16, 1996, commence a  program of
                    onsite construction.

          7.1.5     By December 16, 1997, be in full compliance
                    with the requirements of this rule.

          7.1.6     No owner of any unit subject to this rule
                    shall submit a revision to a control plan
                    after December 16, 1997, unless said revision
                    meets one of the requirements of Sections
                    7.4.1, 7.4.2 and 7.4.3.

     7.2  The owner of any unit that is not in operation on
          December 16, 1993 shall comply with the schedule in
          Section 7.1, or shall submit application for Authority to
          Construct for any modifications necessary to comply with
          this rule prior to operation of the unit.

     7.3  Any unit that does not require the installation of
          equipment to be in compliance with this rule shall
          demonstrate full compliance by December 16, 1994.

     7.4  The compliance dates in Sections 7.1.2, 7.1.3, 7.1.4, and 
          7.1.5 shall be extended for 24 months for any unit
          meeting one or more of the conditions in Sections 7.4.1
          through 7.4.5.  Said units shall be identified in the
          control plan or AECP required by Section 7.1.1. 

          7.4.1     On June 16, 1995, the unit is already
                    controlled and limited by permit condition or
                    an Authority to Construct application has been
                    deemed complete to limit NOx emissions to
                    within 0.025 pound per million Btu of heat
                    input required by Section 5.1; or

          7.4.2     On June 16, 1995, the unit has a rated heat
                    input of less than or equal to 35 million Btu
                    per hour; or

          7.4.3     The unit will be shutdown or replaced to
                    comply with this rule; or

          7.4.4     The method of achieving compliance includes
                    change of fuel type or quality; or

          7.4.5     The unit is fired exclusively on liquid fuel
                    and is owned and operated by a small producer.

     7.5  The compliance dates in Sections 7.1.2, 7.1.3 and 7.1.4
          shall be extended for 24 months for any unit that is part
          of a petroleum refining operation engaged in the
          production of state required reformulated fuels.  Said
          units shall be identified in the control plan or AECP
          required by section 7.1.1, and shall be in full
          compliance by December 31, 2000.
     
     7.6  A unit whose fuel consumption exceeds the level specified
          in Section 4.1.7 shall lose the exemption provided by
          that section.  A complete application for Authority to
          Construct to meet the requirements of this rule shall be
          submitted to the APCO within 30 days from the date the
          exemption level is exceeded.  Full compliance shall be
          demonstrated within 12 months from the date the exemption
          level is exceeded.

8.0  Calculations

     8.1  All ppmv emission limits specified in Section 5.0 are
          referenced at dry stack gas conditions and 3.00 percent
          by volume stack gas oxygen.  Emission concentrations
          shall be corrected to 3.00 percent oxygen as follows:










     8.2  All pounds per million Btu NOx emission rates shall be
          calculated as pounds of nitrogen dioxide per million Btu
          of heat input (hhv).

9.0  Alternative Emission Control

     9.1  General

          The owner of two or more units may comply with Section
          5.1 by controlling  units at the same stationary source
          to achieve an aggregated daily NOx emission factor no
          higher than the aggregated daily NOx emission factor
          limit that would result if each unit were individually in
          compliance with Section 5.1. The owner or operator  shall
          submit an Alternative Emission Control Plan (AECP) that
          is enforceable by the APCO, and receive written approval
          of the AECP from the APCO prior to implementation. The
          AECP shall be updated annually pursuant to Section
          9.6.5.2.  The AECP schedule for achieving reduced NOx
          emission levels shall be at least as expeditious as the
          schedule if applicable units were to comply individually
          with the emission levels in Section 5.0 and the
          increments of progress in Section 7.0.

     9.2  Eligibility

          Boilers, steam generators or process heaters which are
          subject to this rule, and are in existence or are
          replacements for units in existence on December 16, 1993,
          shall be eligible for inclusion in an AECP.

     9.3  Exclusion

          No unit with actual annual heat input less than 90
          billion Btu per year shall be included in an AECP. Actual
          annual heat input shall be reported in the annual AECP
          update required by Section 9.6.5.2.

     9.4  AECP Definitions

          For the purposes of Section 9.0, the following
          definitions shall apply:

          9.4.1     Aggregated daily emission factor limit: the
                    sum of the NOx emissions that would result if
                    all units in the AECP were in compliance with
                    the lb/MMBtu limits in Section 5.1 and
                    operating at their actual firing rates,
                    divided by the sum of the daily rated heat
                    inputs of all units in the AECP.  Aggregated
                    daily emission factor limit is calculated as:







               where:    LA is the aggregated daily emission
                         factor limit (lb/MMBtu),

                         Li is the daily emission factor limit
                         (lb/MMBtu) for each unit in the AECP:

                              0.036 lb/MMBtu for gaseous fuel
                              fired units, or
                              0.052 lb/MMBtu for liquid fuel 
                              fired units, or
                              fuel-weighted average for dual fuel
                              units.

                         Fi is the total heat input (hhv basis) 
                         of fuel (MMBtu) combusted in each unit
                         during a 24 hour period,

                         Ri is the rated heat input for each unit
                         in the AECP (MMBtu/hr), and

                         i identifies each unit in the AECP.
          
          9.4.2     Aggregated daily emission factor: the sum of
                    the actual daily NOx emissions from all units
                    in the AECP, divided by the sum of the daily
                    rated heat inputs of all units in the AECP.
                    Aggregated daily emission factor is calculated
                    as:







               where:    EA is the aggregated daily emission
                         factor (lb/MMBtu),

                         Ei is the emission factor (lb/MMBtu) for
                         each unit in the AECP, established and
                         verified by source testing, or continuous
                         emission monitors,

                         Fi is the total heat input (hhv basis) 
                         of fuel (MMBtu) combusted in each unit
                         during a 24 hour period,

                         Ri is the rated heat input for each unit
                         in the AECP (MMBtu/hr), and 

                         i identifies each unit in the AECP.

     9.5  AECP Requirements

          The aggregated daily emission factor  (EA) shall not
          exceed the aggregated daily emission limit (LA).  The
          owner or operator of any unit in an AECP shall notify the
          APCO within 24 hours of any violation of this section.

     9.6  AECP Administrative Requirements

          9.6.1     The AECP shall:

                    9.6.1.1   Contain all data, records, and other
                              information necessary to determine
                              eligibility of the units for alternative
                              emission control, including but not
                              limited to:
               
                              9.6.1.1.1  A list of units subject to
                                         alternative emission control,
                              9.6.1.1.2  Daily average and maximum hours 
                                         of utilization for applicable units,
                              9.6.1.1.3  Rated heat input  of each applicable
                                         unit, and 
                              9.6.1.1.4  Fuel type for  each unit.  
                              
               9.6.1.2   Present the methodology for recordkeeping
                         and reporting required by Sections 9.6.4
                         and 9.6.5.

               9.6.1.3   Demonstrate that the  aggregated daily
                         emission factor  will meet the
                         requirements of Section 9.5 on each day. 

               9.6.1.4   Demonstrate that the AECP schedule for
                         achieving reduced NOx emission levels is
                         at least as expeditious as the schedule
                         if applicable units were to comply
                         individually with the emission levels in
                         Section 5.0 and the increments of
                         progress in Section 7.0.

          9.6.2     Revision of AECP

                    Owners or operators shall demonstrate APCO approval
                    of the AECP prior to applying for a modification to
                    said AECP.  

          9.6.3     Determination of Emissions

                    9.6.3.1   NOx Emission measurements  shall be in
                              terms of pounds NO2 per million Btu heat
                              input.

                    9.6.3.2   NOx and carbon monoxide emissions shall
                              be measured  according to procedures and
                              test methods specified in section 6.0, or
                              by certified continuous emission monitor
                              (CEM) as required by Section 9.6.3.3.

                    9.6.3.3   Each unit identified in the AECP shall be
                              tested to determine its actual emission
                              factor (Ei) as required in section 9.4.2,
                              according to the schedules in Section 6.3. 
                              Any unit required by District permit condition 
                              to record NOx emissions with a certified CEM 
                              shall use the CEM to determine Ei on a daily 
                              basis.

                    9.6.3.4   All emissions measurements shall be made
                              with the unit operating at conditions
                              representative of normal operations.  No
                              determination of an actual emission factor  
                              shall be established within two hours after 
                              a continuous period in which fuel flow to the 
                              unit is shut off for 30 minutes or longer.

          9.6.4     AECP Recordkeeping

                    9.6.4.1   Records shall be maintained for two calendar 
                              years and shall be made available to the APCO 
                              upon request.

                    9.6.4.2   For each unit included in the AECP the owner 
                              shall maintain the following records for each 
                              day:

                              9.6.4.2.1  fuel type and amount used for each
                                         unit  (Fi),
                              9.6.4.2.2  the actual emission factor for each
                                         unit (Ei) ,
                              9.6.4.2.3  the total emissions for all units
                                         ( EiFi) , 
                              9.6.4.2.4  the  aggregated daily emission 
                                         factor (EA) , and
                              9.6.4.2.5  the aggregated daily emission factor
                                         limit (LA).

          9.6.5     Reporting and Annual Updates

                    9.6.5.1   Not more than 30 days after the end of each 
                              month, the owner of any units included in an 
                              AECP shall submit the records required in 
                              Section 9.6.4.  Said records shall identify 
                              the date of any violation of Section 9.5, 
                              and the amount of excess emissions 
                              ( EiFi -  LiFi) of said violation.

                    9.6.5.2   The owner or operator of any AECP unit shall 
                              update the AECP by March 1 of each year prior 
                              to the full compliance deadlines established 
                              in Sections 7.0 and 9.7.  The annual update 
                              shall include annual fuel consumption totals 
                              for each AECP unit.  Each AECP unit with an 
                              actual annual heat input less than 90 billion
                              Btu during a calendar year shall be excluded 
                              from the following year AECP.

     9.7  Compliance Schedule

          The AECP schedule for achieving reduced NOx emission levels shall 
          be at least as expeditious as the schedule if applicable units 
          were to comply individually with the emissions levels of Section 
          5.0 and the increments of progress in Section 7.0. 

     9.8  Fees

          This section shall be in effect until such time that Regulation III 
          (Fees) are amended to incorporate the following:  The fee for 
          establishing or revising an Alternate Emission Control Plan shall 
          be one filing fee pursuant to Rule 3010 (Permit Fee) and an 
          evaluation fee calculated using the staff hours expended and the 
          prevailing weighted labor rate.










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