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District Rule 1470
(c)(2)(C)(iv)(I) requires that emissions of hydrocarbons, oxides of nitrogen,
non-methane hydrocarbon + oxides of nitrogen, and carbon monoxide, "must
meet the standards for off-road engines of the same model year and maximum rated
power as specified in the Off-Road Compression-Ignition Engine Standards (Title
13, CCR, Section 2423).” On and
after January 1, 2011, for compression-ignition engines 175 hp or greater must
meet Tier 4 requirements. District Rule 1470(c)(3)(C)(i)(I) regulates requirements
for stationary diesel fueled internal combustion and other compression ignition
engines. AQMD adopted Rule 1470
on April 2, 2004 to implement the Air Toxics Control Measure (ATCM), as well as
making some requirements more stringent than the ATCM, such as when an engine is
to be located on a school or is to be located within 100 meters of a school.
This rule was subsequently amended on March 4, 2005, November 3, 2006 and
June 1, 2007 to implement various amendments that the California Air Resources Board
(CARB) made to the ATCM.
On November 8, 2004, CARB adopted a new regulation, ATCM
for Stationary Compression-Ignition Engines, to control emissions of diesel PM
and other air pollutants from stationary compression-ignition engines,
particularly diesel-fueled engines.
The regulation became effective on December 8, 2008, and
is set forth in Section 93115, Title 17, California Code
of Regulations (CCR). The purpose
of this regulation is to reduce the public’s exposure to diesel PM and other air
pollutants by establishing Best Available Control Technology (BACT), which
includes emission standards and operational requirements, for stationary
compression ignition engines that operate or are sold for use in California.
Section 93115 supports the “Risk Reduction Plan to Reduce
Particulate Matter Emissions from Diesel-Fueled Engines and Vehicles,” which was
adopted by the CARB on September 30, 2000.
This regulation was subsequently amended on September 18, 2007 to clarify
certain requirements of this regulation, which became effective on October 18,
2007. Under this regulation, emergency standby engines must meet after-treatment
based Tier 4 interim emission standards.
CARB recently approved amendments to the ATCM for Stationary
Compression-Ignition Engines on October 21, 2010.
The primary purpose of the amendments was to remove the Tier 4 emission
limits for emergency standby engines and to limit diesel particulate matter
emissions for all sizes of engines to 0.15 gram/bhp-hr.
These amendments must be reviewed and approved by the Secretary of State,
Office of Administrative Law (OAL), before they become effective.
This OAL review process was completed and approved on May 19, 2011, and
the amendments became effective immediately.
Due to
the timing issues with the OAL approval process and immediate implementation of
the ATCM amendments, CARB posted a Regulatory Advisory in November 2010.
(CARB’s November 2010 Amendments to Requirements for Stationary
Compression-Ignition (Diesel) Engines) (PDF, 25KB)
This Regulatory Advisory summarizes the amendments to the ATCM and states
that during the transition period from January 1, 2011 to when the amended ATCM
becomes effective, CARB will exercise its enforcement discretion and not enforce
the more stringent Tier 4 interim standards for new emergency standby engines.
The ATCM prior to the May 19, 2011 amendments
specifies that, beginning January 1, 2011, emergency standby engines
175 hp or greater must meet the more stringent Tier 4 interim engine emission requirements.
Consistent with the current requirements of CARB ATCM, Rule
1470 requires that emergency standby engines 50 bhp or greater, and up to 75 bhp, must meet Tier 4 interim emission standards effective January 1, 2008; and
engines 175 bhp or greater must meet the Tier 4 interim emission standards
effective January 1, 2011. In
addition, engines 75 bhp or greater but less than 175 bhp must meet the Tier 4 interim
emission standards effective January 1, 2012.
Under the current requirements of Rule 1470 and other Rules
and Regulations, AQMD will only issue Permits to Construct to emergency
standby engines that meet the Tier 4 interim emission standards.
However,
AQMD intends to amend Rule 1470 to incorporate some of CARB's amendments to
the ATCM.
The initial Proposed Amended
Rule (PAR) 1470 will include a requirement to reduce PM emissions provided that
engines meet emission levels generally applied to Tier 3 or Tier 2 (only for 750
bhp or greater engines) for other pollutants (i.e. NOx, HC, CO. etc.).
PAR 1470 is currently scheduled to be heard by AQMD’s Governing Board in
June 2012. AQMD is petitioning the South Coast Air Quality Management
District Hearing Board for a group stipulated order for abatement to allow
additional time for Diesel-Fueled Internal Combustion Engine Facilities to
operate an emergency standby engine that meets the Tier 3 or Tier 2 (only for
750 bhp or greater engines) emission standards until September 30, 2012, even though the Permit to
Construct for the engine requires compliance with Tier 4 interim emission
standards.
Further details of the group stipulated order of abatement are provided in the
following documents: Petition
and Declaration Package (PDF, 110kb)
Facilities who are not compliant with the Tier 4 interim
emission standards, as set forth in Rule 1470, by the applicable January 1,
2011 deadline are required to either stop operation until compliance is achieved,
or submit for the above-mentioned stipulated order by completing the required
documents. The following list
contains facilities that have asked to be a part of the group stipulated order
for abatement and their current status.
List of Stationary Diesel-Fueled Internal Combustion Engine Facilities
Requesting, Scheduled for, or Issued an Order for Abatement.
Rule 1470 Order of Abatement List (xls,
52kb)
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