SCAQMD RULE 1110-2 EMISSIONS FROM GASEOUS & LIQUID-FUELED INTERNAL COMB. ENGINES
LAST REVISED 12/09/94



(Adopted August 3, 1990)(Amended September 7, 1990)(Amended August 12, 1994)
(Amended December 9, 1994)

RULE 1110.2. EMISSIONS FROM GASEOUS-AND LIQUID-FUELED INTERNAL COMBUSTION ENGINES

(a) Definitions

  1. EMERGENCY STANDBY ENGINE is an engine which operates as a temporary replacement for primary mechanical or electrical power during periods of fuel or energy shortage or while the primary power supply is under repair.
  2. EXISTING ENGINE is an engine for which prior to August 3, 1990:
  3. (A) A valid permit to construct or operate pursuant to Rules 201 and/or 203 has been issued, or

    (B) An application for a permit to construct or operate which has been deemed complete by the Executive Officer or designee has been submitted.

  4. FACILITY is one or more parcels of land in physical contact, or separated solely by a public roadway, on which engines operate.
  5. INTERNAL COMBUSTION ENGINE (ENGINE) is any spark- or compression-ignited internal combustion engine, not including engines used for self-propulsion.
  6. PORTABLE INTERNAL COMBUSTION ENGINE is an engine which is not attached to a foundation and is not operated at a single facility for more than one year and is not a replacement engine for a specific application which lasts or is intended to last for more than one year.
  7. RATED BRAKE HORSEPOWER (bhp) is the rating specified by the manufacturer and listed on the nameplate.
  8. REACTIVE ORGANIC GASES (ROG) means any gaseous chemical compound which contains the element carbon; excluding carbon monoxide, carbon dioxide, carbonic acid, carbonates and metallic carbides; and excluding methane.
  9. STATIONARY INTERNAL COMBUSTION ENGINE is an engine which is either attached to a foundation or if not so attached is operated or is intended to be operated at a single facility for more than one year, including any replacement engine for a specific application which lasts or is intended to last for more than one year.

(b) Applicability

All stationary engines over 50 bhp and all portable engines over 100 bhp are subject to this rule.

(c) Requirements

The owner or operator of any internal combustion engine subject to this rule shall:

  1. replace any such engine with an electric motor, or
  2. reduce emissions from such engine to the following compliance limits in accordance with the compliance schedule of subdivision (e):
  3. (A) The owner or operator of any engine may, in lieu of conversion to electrical power, reduce the emissions of carbon monoxide (CO) from such engine to no more than 2000 PPM; reduce the emissions of oxides of nitrogen (NOx) to a compliance limit of 36 PPM; and reduce the emissions of reactive organic gases (ROG) measured as methane to a compliance limit of 250 PPM; all measured by volume corrected to 15 percent oxygen on a dry basis and averaged over 15 minutes.

    (B) Notwithstanding the provisions of subparagraph (c)(2)(A), the owner or operator of any electric-power-generating engine, any portable engine, any landfill-gas- or sewage-digester-gas-fueled engine, any engine used to drive a water supply or conveyance pump except for aeration facilities, any oil field-produced-gas-fired engine, any integral engine-compressor application operating less than 4000 hours per calendar year, or any liquefied petroleum gas (LPG)-fueled engine may, in lieu of conversion to electrical power, reduce the emissions of CO to no more than 2000 PPM by volume corrected to 15 percent oxygen on a dry basis and averaged over 15 minutes, and reduce the emissions of NOx, and ROG measured as methane from such engines to the following compliance limit:

                                                  EFF
         Compliance Limit  =  Reference Limit  x -----
                                                  25%
    
    Where:
    
         Compliance Limit = allowable NOx, or ROG emissions (ppm by volume)
    
          Reference Limit = the NOx or ROG emission limit (ppm by volume)
                            corrected to 15 percent oxygen on a dry basis,
                            and averaged over 15 consecutive minutes.  These
                            limits for various bhp ratings (continuous rating
                            by the manufacturer) are as follows:
    

    REFERENCE EMISSION LIMITS, PPM

     Bhp Rating                NOx                 ROG
    -----------------------------------------------------
     500 bhp and greater        36                  250
     50 to 500 bhp              45                  250
    
    And,
                            3413 x 100%
      EFF = --------------------------------------------       
             Actual Heat Rate at HHV of Fuel (Btu/kW-hr)                     
    
    or
                                                         LHV  
      EFF = (Manufacturer's Rated Efficiency at LHV)  x ----- 
                                                         HHV 
    
      EFF = the demonstrated percent efficiency at full load when
            averaged over 15 consecutive minutes of the engine only, as calculated,
            within 30 days of the first source test, 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 as measured at peak load for that facility; or the
            manufacturer's continuous rated percent efficiency (manufacturer's
            rated efficiency) of the engine after correction from LHV (lower
            heating value) to the HHV of the fuel, whichever efficiency is
            higher.  The value of EFF shall not be less than 25 percent. 
            Engines with lower efficiencies will be assigned a 25-percent
            efficiency for this calculation.
    

(d) Emission Control Plan

The owner/operator of any existing engine shall submit to the Executive Officer or designee for approval an emissions control plan of all actions and alternatives, including a schedule of increments of progress, which will be taken to meet or exceed the requirements or applicable emissions limitations in subdivision (c) and the compliance schedule in subdivision (e).

  1. Such plan shall contain, at a minimum, a list that provides the following for each engine:
  2. (A) SCAQMD permit or identification number;

    (B) name of engine manufacturer;

    (C) model designation;

    (D) rated brake horsepower;

    (E) specific fuel consumption, gal/bhp-hr or cu ft/bhp-hr, and HHV for each type of fueling, gas/liquid;

    (F) type of liquid and/or type of gaseous fuel;

    (G) total hours of operation on previous one-year period, including hours of operation on a daily basis; and

    (H) fuel consumption (cubic feet of gas or gallons liquid) for the previous one-year period.

    (I) stack modifications to facilitate continuous in-stack monitoring and/or source testing.

  3. A list of all engines required to be controlled, identifying the type of emission control to be applied to such engines along with documentation showing existing emissions of NOx, ROG, and CO.
  4. Supporting documentation for any units exempt under the provisions of paragraph (h)(1).

(e) Compliance

The owner or operator of an engine(s) shall comply with the requirements of subdivision (c) of this rule in accordance with the following schedule:

  1. For existing engines to be replaced with electric motors in accordance with paragraph (c)(1):
  2. (A) By December 31, 1992, submit an emission control plan for Executive Officer or designee approval;

    (B) By April 30, 1998, submit applications for permit to construct and permit to operate motors where applicable;

    (C) By September 30, 1999, initiate equipment installation; and

    (D) By December 31, 1999, have system under compliance, in accordance with an approved emission control plan.

  3. For existing engines to be operated under emission compliance limits of paragraph (c)(2):
  4. (A) By December 31, 1992, submit an emission control plan for Executive Officer or designee approval;

    (B) By April 30, 1993, submit applications for permit to construct and permit to operate engines;

    (C) By September 30, 1994, initiate control equipment installation; and

    (D) By December 31, 1994, have engines and stack modifications, including applicable stack monitoring systems under compliance, in accordance with an approved emission control plan.

  5. For existing engines to be permanently removed from service:
  6. (A) By December 31, 1992, submit a plan for removal of engines from service for Executive Officer or designee approval; and

    (B) By December 31, 1999, have all engines removed from service, in accordance with an approved emission control plan.

  7. Not with standing the provisions of paragraphs (c)(1) and (c)(2) of this rule, for engines that were altered to come into compliance with paragraphs (c)(1) or (c)(2) of Rule 1110.1 by August 3, 1990, or for engines originally installed to effect compliance with and/or meet the limits in subparagraph (c)(1) or (c)(2) of Rule 1110.1 by August 3, 1990:
  8. (A) By December 31, 1999, submit an emission control plan or a plan for compliance with paragraph (c) for Executive Officer or designee approval; and

    (B) By December 31, 2004, be in compliance with paragraph (c) of this rule, in accordance with an approved emission control plan.

    (C) Engines will be considered originally installed to effect compliance with paragraph (e)(4) where the owner or operator of engines, prior to August 3, 1990, has:

    (i) undertaken the complete installation of the engines; or

    (ii) has purchased and received the engines on site for installation; or

    (iii) has purchased custom fabricated engines for which fabrication has been sustantially completed; and has acquired a Permit to Construct for these engines.

  9. For existing engines that are required to come into compliance with paragraph (c)(1) or (c)(2) of Rule 1110.1 after August 3, 1990 and have not achieved compliance by that date shall in lieu of compliance with Rule 1110.1 comply with subdivisions (c) and (e) of Rule 1110.2 provided that an amended emission control plan is submitted by July 1, 1991.
  10. For portable engines to be operated under emission compliance limits of subparagraph (c)(2):
  11. (A) By December 31, 1997, submit an emission control plan for Executive Officer or designee approval;

    (B) By April 30, 1998, submit applications for permit to construct and permit to operate engines;

    (C) By September 30, 1999, initiate control equipment installation; and

    (D) By December 31, 1999, have engines and stack modifications, including applicable stack monitoring systems, in compliance, in accordance with an approved emission control plan.

  12. Any new engine that is not an existing engine must be in compliance with the provisions of this and other applicable rules before being placed in service.

(f) Monitoring and Recordkeeping

The owner/operator of any engine subject to the provisions of subdivision (c) of this rule shall meet the following requirements:

  1. For stationary engines of 1000 bhp and greater, and operating more than two million bhp-hr per calendar year, install, operate and maintain in calibration a continuous in-stack NOx and CO monitoring system as approved by the Executive Officer or designee to demonstrate compliance within the emission limits of this rule. This system shall include equipment that measures and records exhaust gas NOx and CO concentrations, corrected to 15 percent oxygen on a dry basis;
  2. The monitoring system shall have data gathering and retrieval capability approved by the Executive Officer or designee. Data shall be maintained for at least two years and made available for inspection by the Executive Officer or designee.
  3. Provide source test information regarding the exhaust gas; specifically for NOx, ROG reported as methane, and CO concentrations (concentrations in ppm by volume, corrected to 15 percent oxygen on dry basis) at least every 12 months.
  4. The owner/operator of any engine shall maintain an engine operating log that includes: on a monthly basis, the total hours of operation; type and quantity of fuel used (liquid/gas); and the cumulative hours of operation since the last source test required in subparagraph (f)(3). This information shall be available for inspection at any time, and submitted to the Executive Officer or designee at the end of each calendar year in a manner and form approved by the Executive Officer or designee.

(g) Test Method

The NOx emissions subject to the provisions of this rule shall be determined by the procedure detailed in EPA Test Method 20, the CO emissions by EPA Test Method 10, and the ROG emissions by EPA Test Method 25. Any method deemed to be equivalent and published by the Executive Officer may also be used.

(h) Exemptions

  1. The provisions of subdivisions (c), (d), (e), (f), and (g) shall not apply to:
  2. (A) The operation of any engine during the existence of any officially declared disaster or state of emergency.

    (B) Engines used directly and exclusively by the owner/operator for agricultural operations necessary for the growing of crops or raising of fowl or animals.

    (C) Emergency standby engines, including portable engines, as approved by the Executive Officer or designee, which operate less than 200 hours per year as determined by an elapsed operating time meter.

    (D) Engines used for firefighting and flood control.

    (E) Laboratory engines used in research and testing purposes.

    (F) Engines operated for purposes of performance verification and testing.

    (G) Engines operating in the Riverside County Southeast Desert Air Basin (SEDAB) area within the South Coast Air Quality Management District, but not including the nonattainment Planning Area of the Riverside County SEDAB.

    (H) Auxiliary engines used to power other engines or gas turbines during start-ups.

    (I) Supplemental engines which operate less than 700 hours per year for the manufacture of snow and/or operation of ski lifts.

  3. The CO monitoring provisions of paragraphs (f)(1) and (f)(2) of this rule shall not apply to engines approved by the Executive Officer or designee to install, operate and maintain NOx alternative monitoring devices for major sources as specified in subparagraph (c)(2)(B) of District Rule 2012, or engines defined as large NOx sources as specified in clause (d)(1)(B)(i) of District Rule 2012.