SAN LUIS OBISPO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 429 - OXIDES OF NITROGEN AND CARBON MONOXIDE EMISSIONS FROM ELECTRIC POWER GENERATION BOILERS
(Adopted 11/16/93; Revised 4/26/95, 11/13/96, and 11/12/97)

A. APPLICABILITY. The provisions of this Rule shall apply to all electric power generation facilities.

B. DEFINITIONS. For the purposes of this Rule, the following definitions shall apply:
 

  1.  "Boiler": An individual piece of combustion equipment fired with liquid or gaseous fuel and used to produce steam.
  2. "Boiler Rating": The rating of a boiler expressed in million British Thermal Units per hour (mmBTU/hr).
  3. "Clock Hour Average Emissions": Emissions based on a one (1) hour average for each clock hour. The one (1) hour average shall be based on ten (10) consecutive six (6) minute periods. All valid data points within each six (6) minute period shall be averaged to determine the value for that period.
  4. "Day": Any twenty-four hour period from midnight to midnight.
  5. "Electric Power Generation Facility": A facility that generates electricity for offsite use and has a total generating capacity of 100 megawatts or greater .
  6. "Force Majeure Natural Gas Curtailment": An interruption in natural gas service due to one of the following reasons:

 

  1. "Oxides of Nitrogen (NOX)": The molecular forms of nitrogen oxide and nitrogen dioxide. When measured or collected, the total of the two molecular forms are collectively expressed as nitrogen dioxide.
  2. "Shut-down Period": The time period during which a boiler unit is reduced below minimum load or below catalytic reaction temperature, if applicable, to a condition where the fires in the boilers are extinguished.
  3. "Start-up": The time period during which a boiler has no fires in it, until the unit that it serves has reached minimum operating load and catalytic reaction temperature, if applicable.
  4. "Steady State Compliance Testing": Testing which is required by the APCO under the authority of the California Health and Safety Code Section 42303 and District Rule 210.B.1 which occurs at or near steady state turbine load.

C. EXEMPTIONS
 

  1.  The emission limitations listed in Subsections D.1 and D.2 below shall not apply during:

 

  1.  The provisions of Subsection D.4.a shall not apply for a unit during:

D. REQUIREMENTS
 

  1.  Oxides of Nitrogen (NOX) Emission Limits
  1. Carbon Monoxide Emission Limits. Carbon monoxide emissions from boilers rated above 1,500 mmBTU/hr shall not exceed 1,000 ppm based on a one (1) clock hour average at three percent (3%) oxygen on a dry basis.
  2. Ammonia Emission Limit. Ammonia emissions from control devices installed to meet the requirements of this Rule shall not exceed 10 ppm based on a one (1) clock hour average at three percent (3%) oxygen on a dry basis.
  3. Fuel Oil Usage
    a. Until December 31, 2002, when the facility wide emission limit applies, and except as allowed by Subsection C.2 above, fuels oil and mixtures of fuel oil and natural gas shall not be used as fuel for any power generation boiler.

    b. Operation of a boiler unit on a mixture of oil and gas shall be counted as oil operating hours.
     

  1. Continuous Emission Monitoring Systems (CEMS)

E. RECORDKEEPING REQUIREMENTS
 

  1. For boilers subject to this Rule, permanent records shall be maintained for a period of five (5) years after creation and shall be made available for inspection by the APCO upon request. The records shall include, but are not limited to:
  1.  For CEM systems subject to this Rule, records of all raw and processed emissions data for parameters measured shall be maintained for a period of five (5) years after creation and shall be made availab