SACRAMENTO METROPOLITAN AIR QUALITY MANAGEMENT DISTRICT

RULE 412 - STATIONARY INTERNAL COMBUSTION ENGINES LOCATED AT MAJOR STATIONARY SOURCES OF NOX
(Adopted 06-01-95)


INDEX

100 GENERAL

200 DEFINITIONS

300 STANDARDS

400 ADMINISTRATIVE REQUIREMENTS

500 MONITORING AND RECORDS


100 GENERAL

101 PURPOSE: To limit emissions of nitrogen oxides, carbon monoxide, and non-methane hydrocarbons from the operation of stationary internal combustion engines located at a major stationary source of nitrogen oxides.

102 APPLICABILITY: This rule applies to any stationary internal combustion engine in the District rated at more than 50 brake horsepower located at a major stationary source of nitrogen oxides.

110 EXEMPTION, EMERGENCY STANDBY: The provisions of Section 301, Section 302, Section 303 and Section 400 shall not apply to the operation of stationary internal combustion engines used for emergency standby.

111 EXEMPTION, AGRICULTURAL OPERATIONS: The provisions of this rule shall not apply to the operation of stationary internal combustion engines used directly and exclusively for agricultural operations necessary for the growing of crops or the raising of fowl or animals.

112 EXEMPTION, TEST STANDS: The provisions of this rule shall not apply to the operation of stationary internal combustion engines mounted on test stands used for evaluating engine performance.

113 EXEMPTION, EMISSION CONTROL EVALUATION: The provisions of Section 301, Section 302, Section 303, and Section 400 shall not apply to the operation of stationary internal combustion engines used exclusively for research, design and evaluation of emission control devices.

114 EXEMPTION, NONROAD INTERNAL COMBUSTION ENGINE: The provisions of this rule shall not apply to nonroad internal combustion engines.

115 EXEMPTION, MOTOR VEHICLE ENGINES: The provisions of this rule shall not apply to motor vehicle engines.

116 EXEMPTION, FLIGHT LINE INTERNAL COMBUSTION ENGINE: The provisions of this rule shall not apply to internal combustion engines used as support for flight line operations.

200 DEFINITIONS

201 ACTUAL INTERRUPTIONS OF POWER: When electrical service is interrupted by an unforeseeable event.

202 ANNUAL HOURS OF OPERATION: The hours a stationary internal combustion engine operates in a calendar year.

203 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."

204 EMERGENCY STANDBY ENGINE: Any stationary internal combustion engine which does not exceed one hundred (100) hours per year of operation for maintenance purposes and operates under one or more of the following conditions:

205 ENGINE RATING: The output of a stationary internal combustion engine as determined by the engine manufacturer and listed on the nameplate of the unit.

206 INTERNAL COMBUSTION ENGINE: A heat engine in which the combustion that generates the heat takes place inside the engine proper instead of in a furnace.

207 LEAN-BURN ENGINE: Any internal combustion engine that is not a rich-burn engine.

208 LOCATION: Any single site at a building, structure, facility, or installation.

209 MAJOR STATIONARY SOURCE OF NITROGEN OXIDES: A stationary source whose potential to emit exceeds 25 tons per year of nitrogen oxides.

210 MOTOR VEHICLE ENGINE: Any internal combustion engine used to propel a motor vehicle.

211 MOTOR VEHICLE: Any device, self propelled by an internal combustion engine.

212 NONROAD INTERNAL COMBUSTION ENGINE: Any internal combustion engine that:

213 POTENTIAL TO EMIT: The maximum physical and operational design capacity to emit a pollutant. Limitations on the physical or operational design capacity, including emissions control devices and limitations on hours of operation, may be considered only if such limitations are incorporated into the applicable authority to construct and permit to operate. Fugitive emissions associated with the emissions unit or stationary source shall not be included in the potential to emit of the emissions unit or stationary source unless the source belongs to one of the following categories of stationary sources:

214 REASONABLY AVAILABLE CONTROL TECHNOLOGY (RACT): The lowest emission limitation that a particular unit is capable of meeting by using measures that are reasonably available in terms of technological and economic feasibility.

215 RETROFITTING: Retrofitting is the addition of air pollution control equipment to the exhaust stream or physical modification to the combustion system excluding adjustment of an stationary internal combustion engine in order to meet the RACT standards contained in Section 301. Changes in the method of operation shall not be considered as retrofit.

216 RICH-BURN ENGINE: A two or four stroke spark-ignited internal combustion engine where the manufacturer's original recommended operating air/fuel ratio divided by the stoichiometric air/fuel ratio is less than or equal to 1.1.

217 STATIONARY INTERNAL COMBUSTION ENGINE: Any internal combustion engine that:

218 STATIONARY SOURCE: Any building, structure, facility, or emissions unit which emits or may emit any affected pollutant directly or as a fugitive emission.

300 STANDARDS

301 RACT EMISSION LIMITS: After July 1, 1995, an owner or operator of any engine subject to this rule shall not operate the engine unless the engine meets the following emission limits. If retrofitting is required, the engine is exempt from the limits of this Section provided the owner or operator complies with Sections 302 and 401.3

ENGINE OPERATING CONDITIONS

EMISSIONS LIMIT (ppmv @ 15% O2)

 

 

 

NOx

CO

NMHC

Spark Ignited Rich Burn

50

4000

250

Spark Ignited Lean Burn

125

4000

750

Compression Ignited

700

4000

750

302 BARCT EMISSION LIMITS:

TABLE 1: SPARK IGNITED RICH BURN

EMISSION LIMITS EXPRESSED AS PPMV @ 15% O2

 

 

NOX

CO

NMHC

25

4,000

250

TABLE 2: SPARK IGNITED RICH BURN

EXEMPTION FROM TABLE 1 EMISSION LIMITS

 

 

If engine rating is greater than...

...but less than or equal to..

and the actual annual hours of operation are less than or equal to...

50 hp

75 hp

200 hours

75 hp

125 hp

120 hours

125 hp

155 hp

100 hours

155 hp

200 hp

80 hours

200 hp

300 hp

60 hours

300 hp

400 hp

45 hours

400 hp

525 hp

40 hours

TABLE 3: SPARK IGNITED LEAN BURN

EMISSION LIMITS EXPRESSED AS PPMV @ 15% O2

 

 

NOX

CO

NMHC

65

4,000

750

TABLE 4: COMPRESSION IGNITED

EMISSION LIMITS EXPRESSED AS PPMV @ 15% O2

 

 

NOX

CO

NMHC

80

4,000

750

TABLE 5: COMPRESSION IGNITED

EXEMPTION FROM TABLE 4 EMISSION LIMITS

 

 

If engine rating is greater than...

...but less than or equal to...

and the actual annual hours of operation are less than or equal to...

50 hp

75 hp

1,435 hours

75 hp

125 hp

830 hours

125 hp

155 hp

565 hours

155 hp

200 hp

460 hours

200 hp

300 hp

365 hours

300 hp

400 hp

250 hours

400 hp

525 hp

200 hours

303 ALTERNATIVE CONTROL REQUIREMENT: As an alternative to the NOX emission limit specified in Section 302 a stationary internal combustion engine shall achieve and maintain a percent NOX reduction by volume limit specified below as measured concurrently across an emission control device. If internal modifications are made to an engine the percent reduction shall be calculated from source test data before and after internal modification.

304 EQUIPMENT REQUIREMENT: The owner or operator of any stationary internal combustion engine, except for those engines being removed from service under Section 401.5, subject to any provision of this rule shall install one of the following:

400 ADMINISTRATIVE REQUIREMENTS

401 COMPLIANCE SCHEDULE:

402 SOURCE TESTING FREQUENCY: The owner or operator of any stationary internal combustion engine subject to the requirements of Sections 301 through 303 shall conduct source testing every eight thousand seven hundred sixty (8,760) hours of operation or five (5) years which ever is the shorter time period.

500 MONITORING AND RECORDS

501 RECORDKEEPING REQUIREMENTS:

502 TESTING PROCEDURES: Demonstration of compliance with the emission limits specified in Sections 301 through 303 shall be determined using the test methods specified below averaged over three consecutive test runs.