YOLO-SOLANO AIR QUALITY MANAGEMENT DISTRICT
RULE 2.34 - STATIONARY GAS TURBINES
(Adopted July 13, 1994)
110 EXEMPTION - LABORATORY, FIREFIGHTING/FLOOD CONTROL, AND PIPELINE UNITS
111 EXEMPTION - EMERGENCY STANDBY AND SMALL UNITS
202 CHEMICAL PROCESSING GAS TURBINE UNIT
203 COMPLIANCE LIMIT
204 CONTROL SYSTEM OPERATING PARAMETERS
205 EMERGENCY STANDBY UNIT
208 MEASURED NOx EMISSIONS CONCENTRATION
209 NOx EMISSIONS (NOx)
210 PIPELINE GAS TURBINES
211 POWER AUGMENTATION
212 PUBLIC SERVICE UNIT
214 SELECTIVE CATALYTIC REDUCTION (SCR)
215 STATIONARY GAS TURBINE
216 THERMAL STABILIZATION PERIOD
400 ADMINISTRATIVE REQUIREMENTS
401 COMPLIANCE SCHEDULE
402 EMISSION CONTROL PLAN
403 EXEMPT UNITS AND EMERGENCY STANDBY UNITS
500 MONITORING AND RECORDKEEPING
503 TEST METHODS
101 PURPOSE: The purpose of this rule is to limit NOx emissions from stationary gas turbines in conformance with BARCT determinations approved by the California Air Resources Board to meet the requirements of the California Clean Air Act.
102 APPLICABILITY: Except as provided in Sections 110 and 111, this rule shall apply to all stationary gas turbines, 0.3 megawatt (MW) and larger.
110 EXEMPTION - LABORATORY, FIREFIGHTING/FLOOD CONTROL, AND PIPELINE UNITS: The provisions of this rule with the exception of Section 402.3 shall not apply to the operation of stationary gas turbines used under the following conditions:
|110.1||Laboratory units used in research and testing for the advancement of gas turbine technology.|
|110.2||Units operated exclusively for firefighting and/or flood control.|
|110.3||Pipeline gas turbines provided that the owner/operator demonstrates to the satisfaction of the Air Pollution Control Officer that water or steam injection, selective catalytic reduction, or any other emission control technology is not technologically feasible, cost effective or creates adverse environmental impacts such as those associated with the use, transport, or disposal of supplies such as water and ammonia.|
|110.4||Chemical processing gas turbine units.|
111 EXEMPTION - EMERGENCY STANDBY AND SMALL UNITS: The provisions of this rule with the exception of Sections 402.3, 403, and 502.5 shall not apply to the operation of stationary gas turbines used under the following conditions:
|111.1||Emergency standby units demonstrated to operate less than 200 hours per calendar year.|
|111.2||Units of less than 4 MW operating less than 877 hours per calendar year.|
201 BARCT: "Best Available Retrofit Control Technology" as defined in Section 40406 of the California Health and Safety Code as 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 source".
202 CHEMICAL PROCESSING GAS TURBINE UNIT: A stationary gas turbine that vents its exhaust gases into the operating stream of a chemical process.
203 COMPLIANCE LIMIT: Allowable NOx emissions expressed in parts per million by volume (ppmv).
204 CONTROL SYSTEM OPERATING PARAMETERS: Operating parameters that the Air Pollution Control Officer deems necessary to analyze when determining compliance, such as ammonia and exhaust flow rates and exhaust gas temperature for SCR; of humidity, water injection rate, exhaust gas flow rate, and temperature for water injection.
205 EMERGENCY STANDBY UNIT: A stationary gas turbine that operates only as a mechanical or electrical power source for a facility when the primary power source has been rendered inoperable due to a failure beyond the reasonable control of the operator, except due to power interruption pursuant to a voluntary interruptable power supply agreement. Electricity generated by such a unit cannot be sold.
206 HHV: The higher heating value of a fuel.
207 LHV: The lower heating value of the fuel.
208 MEASURED NOx EMISSIONS CONCENTRATION: The concentration of NOx emissions corrected to International Standards Organization (ISO) standard conditions:
NOx = (NOxobs)(Pref/Pobs)0.5(288o/Tamb)1.53[e19(Hobs-0.00633)]
NOx = Emissions of NOx at 15 percent oxygen and ISO standard conditions on a dry basis, ppm.
NOxobs = Measured NOx emissions corrected to 15 percent oxygen on a dry basis, ppm.
Pref = Standard reference pressure, 14.696 psia.
Pobs = Measured site ambient absolute pressure, psia.
Hobs = Measured humidity of ambient air, pounds water per pound dry air.
e = Transcendental constant (2.718).
Tamb = Measured temperature of ambient air, degrees K.
or an alternate correlation that corrects to ISO standard conditions and is approved by the Air Pollution Control Officer.
209 NOx EMISSIONS (NOx): The sum of nitric oxides and nitrogen dioxide in the exhaust gas stream.
210 PIPELINE GAS TURBINES: A stationary gas turbine used to transport gases or liquids in a pipeline.
211 POWER AUGMENTATION: An increase in the gas turbine shaft output and/or the decrease in gas turbine fuel consumption by the addition of energy recovered from exhaust heat.
212 PUBLIC SERVICE UNIT: A gas turbine used to generate electricity for sale or for use in serving the public.
213 RATING: The continuous megawatt (MW) rating or mechanical equivalent by a manufacturer for gas turbine(s) without power augmentation.
214 SELECTIVE CATALYTIC REDUCTION (SCR): A post combustion control technology that utilizes ammonia injected into the exhaust gas stream where it reduces NOx to molecular nitrogen in the presence of a catalyst.
215 STATIONARY GAS TURBINE: Any gas turbine system that is gas and/or liquid fueled with or without power augmentation. This unit is either attached to a foundation at a facility or is portable equipment operated at a specific facility for more than 90 days in any 12-month period. Two or more gas turbines powering one shaft shall be treated as one unit.
216 THERMAL STABILIZATION PERIOD: The two hour start-up time necessary to bring the heat recovery steam generator to the proper temperature, not to exceed two (2) hours.
301 LIMITATIONS: The owner or operator of any stationary gas turbine unit shall not operate such unit under load conditions, excluding the thermal stabilization period which results in the measured NOx emissions concentration exceeding the compliance limit listed below, averaged over 15 minutes:
NOx, ppm @ 15% O2
Megawatt Rating (MW)
0.3 to Less Than 2.9 MW
and Units Greater Than or Equal to 4 MW That Operate Less Than 877 Hour/Year
2.9 to Less Than 10 MW
25 x EFF/25
10.0 MW and Over with SCR
9 x EFF/25
25 x EFF/25
10.0 MW and Over Without SCR
15 x EFF/25
42 x EFF/25
A. GAS INCLUDES NATURAL, DIGESTER, AND LANDFILL GASES.
B. OIL INCLUDES KEROSINE, JET, AND DISTILLATE. THE SULFUR CONTENT OF THE OIL SHALL BE LESS THAN 0.05%.
Where: EFF(efficiency) is the higher of the following:
[where: AHR = Actual Heat Rate at HHV of Fuel (BTU/KW-HR)], which is the demonstrated percent efficiency of the gas turbine only as calculated without consideration of any downstream energy recovery from the actual heat rate, (BTU/KW-HR) or 1.34 (BTU/HP-HR); corrected to the HHV (higher heating value) of the fuel and ISO conditions, as measured at peak load for that facility, or
[where: MRE = Manufacturer's Rated Efficiency with Air Pollution Equipment at LHV.], which is the manufacturer's continuous rated percent efficiency of the gas turbine with air pollution equipment after correction from LHV to HHV of the Fuel.
401 COMPLIANCE SCHEDULE: Owners or operators of all gas turbines subject to the provisions of this rule shall comply with the applicable provisions of Section 301 in accordance with the following schedule:
|401.1||By July 13, 1996, submit to the Air Pollution Control Officer for approval an emission control plan of actions which will demonstrate compliance; and|
|401.2||Within 6 months after approval of the emission control plan specified in Section 402.1, submit an application for an Authority to Construct to the Air Pollution Control Officer; and|
|401.3||By July 13, 1998, demonstrate final compliance.|
The Emission Control Plan shall contain, as a minimum, a list that provides the following for each gas turbine subject to the provisions of this rule:
|402.2||A listing of all gas turbines required to be controlled, identifying the type of emission control to be applied to each gas turbine along with documentation showing existing emissions of oxides of nitrogen.|
|402.3||Support documentation for any units exempt under the provisions of Sections 110 and 111.|
The owner or operator of any unit listed below shall notify the Air Pollution Control Officer in writing within seven days if the hour-per-year limit is exceeded. A public service unit operating during a state of emergency, when such emergency is declared by proclamation of the Governor of the State of California and when the unit is located in the specific geographical location identified in the proclamation, shall be excluded from the hour-per-year limit. If the hour-per-year limit is exceeded, the exemption shall be permanently withdrawn. Within 30 days after the exceedance, the owner or operator shall submit a application for Authority to Construct that details a plan to meet the applicable limits specified in Section 301 of this rule within two years. Included in this application, the owner or operator shall submit an emission control plan that includes a schedule of increments of progress for the installation of the required control equipment. This schedule shall be subject to the review and approval of the Air Pollution Control Officer.
500 MONITORING AND RECORDKEEPING
501 MONITORING: The owner or operator of any stationary gas turbine subject to the provisions of this rule shall perform the following actions:
Install, operate and maintain in calibration equipment, as approved by the Air Pollution Control Officer, that continuously measures and records the following: