RULE 4702	INTERNAL COMBUSTION ENGINES – PHASE 2  (Adopted August 21,
2003; Amended June 16, 2005; Amended April 20, 2006; Amended January 18,
2007)

1.0	Purpose

The purpose of this rule is to limit the emissions of nitrogen oxides
(NOx), carbon monoxide (CO), and volatile organic compounds (VOC) from
internal combustion engines.  

2.0	Applicability

This rule applies to any internal combustion engine with a rated brake
horsepower greater than 50 horsepower.  

3.0	Definitions

3.1	Agreement to Electrify:  a binding, non-cancelable contract written
by the APCO and signed by the operator and the APCO prior to January 1,
2008 that commits the operator to complying with the requirements of
Section 5.1.1 or Section 5.1.2 of this rule by electrifying.

3.2	Agriculture Operations (AO):  as defined in Rule 4550 (Conservation
Management Practices).

3.3	Beam-balanced Pumping Engine:  a cyclic loaded engine powering an
oil well pump, with the pump counterweight on the back end of the
walking beam.  The counterweight is moved mechanically without a
cylinder supplying air pressure.

3.4	California Reformulated Gasoline:  gasoline meeting California Air
Resources Board requirements for motor vehicle fuel in accordance with
California Code of Regulations, Chapter 5, Article 1, Subarticle 2 -
Standards for gasoline sold beginning March 1, 1996.

3.5	Certified Compression-Ignited Engine:  a Tier 1, Tier 2, Tier 3, or
Tier 4 compression-ignited engine that is EPA certified as specified in
Title 40 Code of Federal Regulations Part 89 or in Title 40 Code of
Federal Regulations Part 1039. 

3.6	Certified Spark-Ignited Engine:  a spark-ignited engine that is used
exclusively in agricultural operations and that is ARB certified as
specified in Title 13, Division 3, Chapter 9, Article 4.5, Section 2433
of the California Code of Regulations and that has been certified to
meet a Certification Level for hydrocarbon plus NOx emissions of 0.6
grams/bhp-hr (40.2 ppmv) or less.

3.7	CO:  carbon monoxide.

3.8	Compression-Ignited Internal Combustion Engine:  an engine that uses
the heat of compression to initiate combustion.

3.9	Crank-balanced Pumping Engine:  a cyclic loaded engine powering an
oil well pump, with the pump counterweight attached to a gearbox which
is attached to the walking beam with a pitman arm.  The counterweight is
moved mechanically, in a circular motion, without a cylinder supplying
air pressure.

3.10	Cyclic Loaded Engine:  an internal combustion engine that, under
normal operating conditions, varies in shaft load by 40% or more of
rated brake horsepower during recurrent periods of 30 seconds or less or
is used to power an oil well reciprocating pump unit.

3.11	De-rated Engine:  an internal combustion engine which has been
physically limited and restricted by permit condition to an operational
level of less than 50 horsepower.

3.12	Diesel Engine:  a compression-ignited internal combustion engine.

3.13	Disaster or State of Emergency:  a fire, flood, earthquake, or
other similar natural catastrophe.

3.14	Distributed Generation (DG):  relatively small power plants, such
as internal combustion engine generator sets, which are used to generate
electrical power that is either fed into the power grid or used on-site.
 DG units are located throughout the grid and are usually sited in or
close to load centers or utility customers’ sites.  Distributed
Generation also refers to a mechanical drive system consisting of one or
more internal combustion engines and electric motors, where use of the
internal combustion engines or electric motors is interchangeable.

3.15	Emergency Standby Engine:  an internal combustion engine which
operates as a temporary replacement for primary mechanical or electrical
power during an unscheduled outage caused by sudden and reasonably
unforeseen natural disasters or sudden and reasonably unforeseen events
beyond the control of the operator.  An engine shall be considered to be
an emergency standby engine if it is used only for the following
purposes: (1) periodic maintenance, periodic readiness testing, or
readiness testing during and after repair work; (2) unscheduled outages,
or to supply power while maintenance is performed or repairs are made to
the primary power supply; and (3) if it is limited to operate 100 hours
or less per calendar year for non-emergency purposes.  An engine shall
not be considered to be an emergency standby engine if it is used: (1)
to reduce the demand for electrical power when normal electrical power
line service has not failed, or (2) to produce power for the utility
electrical distribution system, or (3) in conjunction with a voluntary
utility demand reduction program or interruptible power contract.  

3.16	Exhaust Control:  device or technique used to treat an engine’s
exhaust to reduce NOx, VOC, or CO emissions, and include, but is not
limited to, catalysts, afterburners, reaction chambers, and chemical
injectors.

3.17	Flood:  a sudden and reasonably unforeseen rising and overflowing
of a body of water especially onto normally dry land.

3.18	Gaseous Fuel:  a fuel which is a gas at standard conditions
including but not limited to natural gas, methane, ethane, propane,
butane and liquefied petroleum gas (LPG).

3.19	Installation Date:  the date that an internal combustion engine is
initially placed at a location in order to be operated for the first
time in its lifetime.

3.20	Internal Combustion Engine:  any spark- or compression-ignited
reciprocating engine.

3.21	Lean-Burn Engine:  any spark-ignited internal combustion engine
that is operated with an exhaust stream oxygen concentration of four (4)
percent by volume, or greater prior to any exhaust stream control
device.

3.22	Location:  any single site at a building, structure, facility, or
installation.

3.23	Military Tactical Equipment:  a transportable engine operated by
the United States armed forces or National Guard which is designed
specifically for military use in an off-road, dense terrain; hostile
environment; or aboard military combat vessels.

3.24	Mobile Agricultural Equipment:  equipment at an agricultural
operation which is towed or mounted on a vehicle and is continuously
moved during the operation of the equipment.  Mobile Agricultural
Equipment includes, but is not limited to sprayers, balers, and harvest
equipment.  

3.25	NOx:  oxides of nitrogen, calculated as equivalent nitrogen dioxide
(NO2). 

3.26	Public Utilities Commission (PUC) Quality Natural Gas:  PUC quality
natural gas means high methane gas (at least 80% methane by volume) as
specified in PUC General order 58-A. 

3.27	Rated Brake Horsepower:  the continuous brake horsepower rating
specified for the engine by the manufacturer or listed on the nameplate
of the unit, unless otherwise physically limited and specified by a
condition on the engine's Permit-to-Operate or Permit-Exempt Equipment
Registration.

3.28	Replacement Engine:  an engine that is installed to replace an
engine that was in place as of June 16, 2005 and that such replacement
is performed solely for the purpose of complying with the requirements
of Section 5.1 of this rule.

3.29	Rich-Burn Engine:  any spark-ignited internal combustion engine
that is operated with an exhaust stream oxygen concentration of less
than four (4) percent by volume prior to any exhaust stream control
device.

3.30	Spark-ignited Internal Combustion Engine:  a liquid or gaseous
fueled engine designed to ignite its air/fuel mixture by a spark across
a spark plug.  

3.31	Stationary Source:  as defined in Rule 2201  (New and Modified
Stationary Source Review Rule).

Tier 1 Engine, Tier 2 Engine, Tier 3 Engine, and Tier 4 Engine:  an EPA
certified compression-ignited engine that meets the Tier 1, Tier 2, or
Tier 3 emission standards of Table 1 on page 56970 of the Final Rule
(October 23, 1998) or the Tier 4 emission standards of Table II.A.2
(Tier 4 NOx and NMHC Standards and Schedule) on page 38971 of the Final
Rule (June 29, 2004) or Table II.A.4 (Tier 4 Standards for Engines Over
750 HP (G/BHP-HR)) on page 38980 of the Final Rule (June 29, 2004),
respectively. 

3.33	VOC:  volatile organic compounds, as defined in Rule 1020
(Definitions).

3.34	Waste Gas:  an untreated, raw gas derived through a natural
process, such as anaerobic digestion, from the decomposition of organic
waste at municipal solid waste landfills or publicly owned wastewater
treatment facility.  Waste gas includes landfill gas which is generated
at landfills, digester gas which is generated at sewage treatment
facilities, or a combination of the two.

3.35	Wind Machine:  a machine consisting of a large fan mounted on a
tower powered by an internal combustion engine, used exclusively to
provide protection to crops, including, but not limited to oranges,
lemons, and grapes, from cold weather by effecting a heat transfer by
moving warmer atmospheric air downward and mixing it with the colder air
surrounding a crop.

4.0	Exemptions

4.1	The requirements of this rule shall not apply to the following
engines:

4.1.1	An engine used to propel implements of husbandry, as that term is
defined in Section 36000 of the California Vehicle Code, as that section
existed on January 1, 2003.  

4.1.2	An engine used exclusively to power a wind machine.

4.1.3	A de-rated spark-ignited engine not used in agricultural
operations, provided the de-rating occurred before June 1, 2004.  

4.1.4	A de-rated spark-ignited engine used in agricultural operations or
a de-rated compression-ignited engine, provided the de-rating occurred
before June 1, 2005.  

4.1.5	An engine used exclusively to power Mobile Agricultural Equipment.

4.2	Except for the requirements of Section 5.7 and Section 6.2.3, the
requirements of this rule shall not apply to:

4.2.1	An emergency standby engine as defined in Section 3.0 of this
rule, and provided that it is operated with a nonresettable elapsed
operating time meter.  In lieu of a nonresettable time meter, the owner
of an emergency engine may use an alternative device, method, or
technique, in determining operating time provided that the alternative
is approved by the APCO.  The owner of the engine shall properly
maintain and operate the time meter or alternative device in accordance
with the manufacturer’s instructions.  

4.2.2	An internal combustion engine that is operated no more than 200
hours per calendar year as determined by an operational nonresettable
elapsed operating time meter and provided the engine is not used to
perform any of the functions specified in Section 4.2.2.1 through
Section 4.2.2.3 below.  In lieu of a nonresettable time meter, the owner
of an engine may use an alternative device, method, or technique, in
determining operating time provided that the alternative is approved by
the APCO.  The owner of the engine shall properly maintain and operate
the time meter or alternative device in accordance with the
manufacturer’s instructions.  

4.2.2.1	To generate electrical power that is either fed into the
electrical utility power grid or used to reduce electrical power
purchased by a stationary source,

4.2.2.2	To generate mechanical power that is used to reduce electrical
power purchased by a stationary source, or

4.2.2.3	In a distributed generation application. 

4.3	Except for the administrative requirements of Section 6.2.3, the
requirements of this rule shall not apply to:

4.3.1	An internal combustion engine that meets the following conditions:

4.3.1.1  The engine is operated exclusively to preserve or protect
property, human life, or public health during a disaster or state of
emergency, such as a fire or flood, and

4.3.1.2  Except for operations associated with Section 4.3.1.1, the
engine is limited to operate no more than 100 hours per calendar year as
determined by an operational nonresettable elapsed operating time meter,
for periodic maintenance, periodic readiness testing, and readiness
testing during and after repair work of the engine, and 

4.3.1.3	The engine is operated with a nonresettable elapsed operating
time meter.  In lieu of installing a nonresettable time meter, the owner
of an engine may use an alternative device, method, or technique, in
determining operating time provided that the alternative is approved by
the APCO.  The owner of the engine shall properly maintain and operate
the time meter or alternative device in accordance with the
manufacturer’s instructions.    

4.3.2	An internal combustion engine registered as a portable emissions
unit under Rule 2280 (Portable Equipment Registration) or the Statewide
Portable Equipment Registration Program pursuant to Sections 2450-2465,
Article 5, Title 13, California Code of Regulations. 

4.3.3	Military Tactical Equipment and engines used to retract military
aircraft arresting gear cables.

4.4.	A replacement engine installed for the sole purpose of complying
with the requirements of this rule shall be exempt from the Best
Available Control Technology (BACT) and Offsets requirements of District
Rule 2201 (New and Modified Stationary Source Review Rule) provided that
all of the following conditions are met:

4.4.1	The replacement engine is of equal or lesser horsepower rating of
the engine being replaced,

4.4.2	The replacement engine is subject to the same operational
parameters (e.g. hours of operation, fuel use limitations, etc.) as the
engine being replaced,

4.4.3	The replacement engine performs the same function as the engine
being replaced, and

4.4.4	The emissions of the replacement engine are no greater than the
emissions of the engine being replaced.

5.0	Requirements

5.1	Engine Emission Limits/Standards 

5.1.1	Spark-Ignited Internal Combustion Engine Emission Limits/Standards
- The owner of a spark-ignited internal combustion engine shall not
operate it in such a manner that results in emissions exceeding the
limits in Table 1 below for the appropriate engine type according to the
compliance schedules listed in Section 7.0 or according to the
compliance dates specified in Table 1 below.  A spark-ignited engine
shall comply with the applicable emission limits pursuant to Section 5.1
or Section 8.0.  

Table 1	Emission Limits/Standards for a Spark-Ignited Internal
Combustion Engine and Emission Limits/Standards and Compliance Schedule
for a Spark-Ignited Engine Used Exclusively in Agricultural Operations
(corrected to 15% oxygen on a dry basis)

Engine Type	NOx	CO	VOC

1.  Rich-Burn

  a. Waste gas fueled	50 ppmv or 90% reduction	2000 ppmv	250 ppmv

  b. Cyclic loaded, field gas fueled	50 ppmv	2000 ppmv	250 ppmv

  c. All other engines	25 ppmv or 96% reduction	2000 ppmv	250 ppmv

2.  Lean-Burn

  a. Two stroke, gaseous fueled, less than 100 horsepower	75 ppmv or 85%
reduction	2000 ppmv	750 ppmv

  b. All other engines	65 ppmv or 90% reduction	2000 ppmv	750 ppmv

3.  Rich-Burn Engine Used Exclusively in Agricultural Operations

  a. Comply by 1/1/2009, or if owner has an agreement to electrify,
comply by 1/1/2010 	

90 ppmv or 80% reduction	

2000 ppmv	

250 ppmv

4.  Lean-Burn Engine Used Exclusively in Agricultural Operations

  a. Comply by 1/1/2009 or if owner has an agreement to electrify comply
by 1/1/2010	

150 ppmv or 70% reduction	

2000 ppmv	

750 ppmv

5.  Certified Spark-Ignited Engine Used Exclusively in AO and installed
on or before June 16, 2005

  a. Comply by 6/1/2006	Meet Certified Spark-Ignited Engine Standard of
HC+NOx < 0.6 g/bhp-hr



5.1.2	Compression-Ignited Internal Combustion Engine Emission
Limits/Standards and Compliance Schedules – The owner of a
compression-ignited internal combustion engine shall repower, replace or
control the engine to comply with the applicable limits/standards and
compliance dates in Table 2 below.  The annual hours of operation shall
be determined on a calendar year basis.  A compression-ignited engine
shall comply with the applicable emission limits/standards pursuant to
Section 5.1.2 or Section 8.0.  

Table 2	Emission Limits/Standards and Compliance Schedule for a
Compression-Ignited Internal Combustion Engine (corrected to 15% oxygen
on a dry basis)

Engine Type	Emission Limit/

Standard	Compliance Date

1.	Non-Certified Compression-Ignited Engine

a.	Greater than 50 bhp but not more than 500 bhp	EPA Tier 3 or Tier 4
1/1/2010

b.	Greater than 500 bhp but not more than 750 bhp and less than 1000
annual operating hours	EPA Tier 3	1/1/2010

c.	Greater than 750 bhp and less than 1000 annual operating hours	EPA
Tier 4	7/1/2011

d.	Greater than 500 bhp and greater than or equal to 1000 annual
operating hours	80 ppm NOx,

2,000 ppm CO,

750 ppm VOC	1/1/2008 or, if owner has an agreement to electrify, comply
by 1/1/2010 

2.	Certified Compression-Ignited Engine

a.	EPA Certified Tier 1 or Tier 2 Engine	EPA Tier 4	1/1/2015 or 12 years
after installation date, whichever is later

b.	EPA Certified Tier 3 or Tier 4 Engine	Meet Certified
Compression-Ignited Engine Standard in effect at time of installation	At
time of installation



5.1.3	On and after June 1, 2006, the owner of an AO rich-burn
spark-ignited engine, AO lean-burn spark-ignited engine, or AO
compression-ignited engine that is subject to the requirements of
Section 5.1 shall not replace such engine with a rich-burn
spark-ignited, lean-burn spark-ignited, or compression-ignited engine,
respectively, that emits more emissions of NOx, VOC, and CO, on a ppmv
basis, (corrected to 15% oxygen on a dry basis) than the engine being
replaced.

5.1.4	The owner of a non-certified compression-ignited engine, in place
on June 1, 2006, shall comply with the Emission Limit/Standard and
Compliance Date in Table 2 based on the non-certified
compression-ignited engine that was in place on June 1, 2006, unless the
owner meets one of the following conditions:

5.1.4.1	Replaces the non-certified compression-ignited engine with a
non-modified Tier 3 or a non-modified Tier 4 engine after June 1, 2006,

5.1.4.2	Controls the non-certified compression-ignited engine after June
1, 2006, to emit emissions less than, or equal to, 80 ppm NOx, 2,000 ppm
CO, and 750 ppm VOC, (corrected to 15% oxygen on a dry basis), or

5.1.4.3	Replaces the non-certified compression-ignited engine after June
1, 2006, with an engine or other source with emissions less than, or
equal to, 80 ppm NOx, 2,000 ppm CO, and 750 ppm VOC (corrected to 15%
oxygen on a dry basis).

5.2	All continuous emission monitoring systems (CEMS) emissions
measurements shall be averaged over a period of 15 consecutive minutes. 
Any 15-consecutive-minute block average CEMS measurement exceeding the
applicable emission limits of this rule shall constitute a violation of
this rule.

5.3	Percent emission reductions, if used to comply with the NOx emission
limits of Section 5.1, shall be calculated as follows:

5.3.1	For engines with external control devices that are not operated in
combination with a second emission control device or technique, percent
reduction shall be calculated using emission samples taken at the inlet
and outlet of the control device.  

5.3.2	For engines without external control devices and for engines with
an external control device in combination with a second emission control
device or technique, percent reduction shall be based on source test
results for the uncontrolled engine and the engine after the control
device or technique has been employed.  In this situation, the
engine’s typical operating parameters, loading, and duty cycle shall
be documented and repeated at each successive post-control source test
to ensure that the engine is meeting the percent reduction limit.  When
representative source sampling prior to the application of an emissions
control technology or technique is not available, the APCO may approve
the use of a manufacturer’s uncontrolled emissions information or
source sampling from a similar, uncontrolled engine.

5.4	The owner of an internal combustion engine that uses percent
emission reduction to comply with the NOx emission limits of Section 5.1
shall provide an accessible inlet and outlet on the external control
device or the engine as appropriate for taking emission samples and as
approved by the APCO.

5.5	California Reformulated Gasoline shall be used as the fuel for all
gasoline-fired, spark-ignited internal combustion engines.

5.6	Monitoring Requirements A

The owner of a non-AO spark-ignited engine subject to the requirements
of Section 5.1 or any engine subject to the requirements of Section 8.0
shall comply with the following requirements: 

5.6.1	For each engine with a rated brake horsepower of 1,000 hp or
greater and which is allowed by Permit-to-Operate or Permit-Exempt
Equipment Registration condition to operate more than 2,000 hours per
calendar year, or with an external emission control device, either
install, operate, and maintain continuous monitoring equipment for NOx,
CO, and oxygen, as identified in Rule 1080 (Stack Monitoring), or
install, operate, and maintain APCO-approved alternate monitoring.  The
monitoring system may be a continuous emissions monitoring system
(CEMS), a parametric emissions monitoring system (PEMS), or an
alternative monitoring system approved by the APCO.  APCO-approved
alternate monitoring shall consist of one or more of the following:

5.6.1.1	Periodic NOx and CO emission concentrations,

5.6.1.2	Engine exhaust oxygen concentration,

5.6.1.3	Air-to-fuel ratio,

5.6.1.4	Flow rate of reducing agents added to engine exhaust,

5.6.1.5	Catalyst inlet and exhaust temperature,

5.6.1.6	Catalyst inlet and exhaust oxygen concentration,

5.6.1.7	Other operational characteristics.

5.6.2	For each engine not subject to Section 5.6.1, monitor operational
characteristics recommended by the engine manufacturer or emission
control system supplier, and approved by the APCO.

5.6.3	For each engine with an alternative monitoring system, submit to,
and receive approval from the APCO, adequate verification of the
alternative monitoring system’s acceptability.  This would include
data demonstrating the system’s accuracy under typical operating
conditions for the specific application and any other information or
data deemed necessary in assessing the acceptability of the alternative
monitoring system.

5.6.4	For each engine with an APCO approved CEMS, operate the CEMS in
compliance with the requirements of 40 Code of Federal Regulations (CFR)
Part 51, 40 CFR Parts 60.7 and 60.13 (except subsection h), 40 CFR
Appendix B (Performance Specifications), 40 CFR Appendix F (Quality
Assurance Procedures), and applicable provisions of Rule 1080 (Stack
Monitoring).

 

5.6.5	For each engine, have the data gathering and retrieval
capabilities of an installed monitoring system described in Section 5.6
approved by the APCO.  

5.6.6	For each engine, install and operate a nonresettable elapsed
operating time meter.  In lieu of installing a nonresettable time meter,
the owner of an engine may use an alternative device, method, or
technique, in determining operating time provided that the alternative
is approved by the APCO and is allowed by Permit-to-Operate or
Permit-Exempt Equipment Registration condition.  The owner of the engine
shall properly maintain and operate the time meter or alternative device
in accordance with the manufacturer’s instructions.    

5.6.7	For each engine, implement the Inspection and Monitoring (I&M)
plan, if any, submitted to and approved by the APCO pursuant to Section
6.5.  

5.6.8	For each engine, collect data through the I&M plan in a form
approved by the APCO.  

5.6.9	For each engine use a portable NOx analyzer to take NOx emission
readings to verify compliance with the emission requirements of Section
5.1 or Section 8.0 during each calendar quarter in which a source test
is not performed and the engine is operated.  All emission readings
shall be taken with the engine operating either at conditions
representative of normal operations or conditions specified in the
Permit-to-Operate or Permit-Exempt Equipment Registration.  The analyzer
shall be calibrated, maintained, and operated in accordance with the
manufacturer’s specifications and recommendations or a protocol
approved by the APCO.  All NOx emissions readings shall be reported to
the APCO in a manner approved by the APCO.  NOx emission readings taken
pursuant to this section shall be averaged over a 15 consecutive-minute
period by either taking a cumulative 15 consecutive-minute sample
reading or by taking at least five (5) readings evenly spaced out over
the 15 consecutive-minute period.  

5.6.10	The APCO shall not approve an alternative monitoring system
unless it is documented that continued operation within ranges of
specified emissions-related performance indicators or operational
characteristics provides a reasonable assurance of compliance with
applicable emission limits.  The operator shall source test over the
proposed range of surrogate operating parameters to demonstrate
compliance with the applicable emission standards. 

5.6.11	For each engine subject to Section 8.0, install and operate a
nonresettable fuel meter.  In lieu of installing a nonresettable fuel
meter, the owner may use an alternative device, method, or technique in
determining daily fuel consumption provided that the alternative is
approved by the APCO.  The owner shall properly maintain, operate, and
calibrate the required fuel meter in accordance with the
manufacturer’s instructions.    

5.7	Monitoring Requirements B

5.7.1	The owner of any of the following engines shall comply with the
requirements specified in Section 5.7.2 through Section 5.7.5 below:

5.7.1.1	An AO spark-ignited engine subject to the requirements of
Section 5.1, 

5.7.1.2	A compression-ignited engine subject to the requirements of
Section 5.1, or

5.7.1.3	An engine subject to Section 4.2.

5.7.2	Properly operate and maintain each engine as recommended by the
engine manufacturer or emission control system supplier.

5.7.3	Monitor the operational characteristics of each engine as
recommended by the engine manufacturer or emission control system
supplier.

5.7.4	Install and operate a nonresettable elapsed operating time meter. 
In lieu of installing a nonresettable time meter, the owner of an engine
may use an alternative device, method, or technique, in determining
operating time provided that the alternative is approved by the APCO and
is allowed by Permit-to-Operate or Permit-Exempt Equipment Registration
condition.  The owner of the engine shall properly maintain and operate
the time meter or alternative device in accordance with the
manufacturer’s instructions.      

5.7.5	The owner of an AO spark-ignited engine that has been retro-fitted
with a NOx exhaust control that has not been certified in accordance
with Section 9.0 Exhaust Control System Certification Requirements, or a
compression-ignited engine that has been retro-fitted with a NOx exhaust
control shall comply with the following:

5.7.5.1	Use a portable NOx analyzer to take NOx emission readings to
demonstrate compliance with the emission requirements of Section 5.1.  

5.7.5.2	The owner of a compression-ignited engine that is subject to the
limits/standards of Section 5.1.2 Table 2 Category 1.d shall use a
portable NOx analyzer to take NOx emission readings at least once every
six months that the engine is operated. 

5.7.5.3	The owner of any other engine that has been retro-fitted with a
NOx exhaust control shall use a portable NOx analyzer to take NOx
emission readings at least once every 24 months that the engine is
operated.

5.7.5.4	All emission readings shall be taken with the engine operating
either at conditions representative of normal operations or conditions
specified in the Permit-to-Operate or Permit-Exempt Equipment
Registration.  

5.7.5.5	The analyzer shall be calibrated, maintained, and operated in
accordance with the manufacturer’s specifications and recommendations
or a protocol approved by the APCO.  

5.7.5.6	All NOx emissions readings shall be reported to the APCO in a
manner approved by the APCO.  

5.7.5.7	NOx emission readings taken pursuant to this section shall be
averaged over a 15 consecutive-minute period by either taking a
cumulative 15 consecutive-minute sample reading or by taking at least
five (5) readings evenly spaced out over the 15 consecutive-minute
period.  

5.8	Permit-Exempt Equipment Registration Requirements

The owner of an engine used exclusively in agricultural operations shall
register such engine pursuant to Rule 2250 (Permit-Exempt Equipment
Registration), except for an engine that meets any one of the following
conditions:

5.8.1	The engine is required to have a Permit-to-Operate pursuant to
California Health and Safety Code Section 42301.16, or

5.8.2	The engine is not required to comply with Section 5.1 of this
rule.

6.0	Administrative Requirements

6.1	Emission Control Plan

The owner of an engine subject to the requirements of Section 5.1 or
Section 8.0, except for an engine specified in Section 6.1.1, of this
rule shall submit to the APCO an APCO-approvable emission control plan
of all actions to be taken to satisfy the emission requirements of
Section 5.1 and the compliance schedules of Section 7.0. 

6.1.1	The requirement to submit an emission control plan shall not apply
to an engine specified below:

6.1.1.1	A certified compression-ignited engine that has not been
retro-fitted with an exhaust control and is not subject to the
requirements of Section 8.0, 

6.1.1.2	A certified spark-ignited engine that has not been retro-fitted
with an exhaust control and is not subject to the requirements of
Section 8.0, 

6.1.1.3	An AO spark-ignited engine that has not been retro-fitted with a
catalytic emission control device and is not subject to the requirements
of Section 8.0,

6.1.1.4	An engine subject to Section 4.2, or

6.1.1.5	An engine subject to Section 4.3.

6.1.1.6 	An engine with an operating exhaust control system that has
been certified in accordance with Section 9.0 Exhaust Control System
Certification Requirements.

6.1.2	Such emission control plan shall contain the following
information, as applicable for each engine:

6.1.2.1	Permit-to-Operate number, Authority-to-Construct number, or
Permit-Exempt Equipment Registration number

6.1.2.2	Engine manufacturer 

6.1.2.3	Model designation and engine serial number

6.1.2.4	Rated brake horsepower 

6.1.2.5	Type of fuel and type of ignition 

6.1.2.6	Combustion type: rich-burn or lean-burn

6.1.2.7	Total hours of operation in the previous one-year period,
including typical daily operating schedule

6.1.2.8	Fuel consumption (cubic feet for gas or gallons for liquid) for
the previous one-year period

6.1.2.9	Stack modifications to facilitate continuous in-stack monitoring
and to facilitate source testing

6.1.2.10	Type of control to be applied, including in-stack monitoring
specifications

6.1.2.11	Applicable emission limits

6.1.2.12	Documentation showing existing emissions of NOx, VOC, and CO,
and

6.1.2.13	Date that the engine will be in full compliance with Rule 4702.

6.1.3	The emission control plan shall identify the type of emission
control device or technique to be applied to each engine and a
construction/removal schedule, or shall provide support documentation
sufficient to demonstrate that the engine is in compliance with the
emission requirements of this rule.

6.1.4	For an engine being permanently removed from service, the emission
control plan shall include a letter of intent pursuant to Section 7.2.

6.2	Recordkeeping

6.2.1	Except for engines subject to Section 4.0, the owner of an engine
subject to the requirements of Section 5.1 of this rule shall maintain
an engine operating log to demonstrate compliance with this rule. This
information shall be retained for a period of at least five years, shall
be readily available, and be made available to the APCO upon request. 
The engine operating log shall include, on a monthly basis, the
following information:

6.2.1.1	Total hours of operation,

6.2.1.2	Type of fuel used,

6.2.1.3	Maintenance or modifications performed,

6.2.1.4	Monitoring data,

6.2.1.5	Compliance source test results, and

6.2.1.6	Any other information necessary to demonstrate compliance with
this rule.

6.2.1.7	For an engine subject to Section 8.0, the quantity  (cubic feet
of gas or gallons of liquid) of fuel used on a daily basis.	

6.2.2	The data collected pursuant to the requirements of Section 5.6 and
Section 5.7 shall be maintained for at least five years, shall be
readily available, and made available to the APCO upon request.  

 6.2.3	An owner claiming an exemption under Section 4.2 or Section 4.3
shall maintain annual operating records.  This information shall be
retained for at least five years, shall be readily available, and
provided to the APCO upon request. The records shall include, but are
not limited to, the following:

6.2.3.1	Total hours of operation, 

6.2.3.2	The type of fuel used,

6.2.3.3	The purpose for operating the engine, 

6.2.3.4	For emergency standby engines, all hours of non-emergency and
emergency operation shall be reported, and 

6.2.3.5	Other support documentation necessary to demonstrate claim to
the exemption.  

6.3	Compliance Testing

The owner of an engine subject to the requirements of Section 5.1 or the
requirements of Section 8.0, shall comply with the following
requirements, except for an engine specified in Section 6.3.1: 

6.3.1	The requirements of Section 6.3.2 through Section 6.3.4 shall not
apply to any of the following engines:

6.3.1.1	A certified compression-ignited engine that has not been
retro-fitted with an exhaust control and is not subject to the
requirements of Section 8.0.

6.3.1.2	A certified spark-ignited engine that has not been retro-fitted
with an exhaust control and is not subject to the requirements of
Section 8.0. 

6.3.1.3	An AO spark-ignited engine that has not been retro-fitted with a
catalytic emission control device and is not subject to the requirements
of Section 8.0. 

6.3.1.4	An engine subject to Section 4.2.

6.3.1.5	An engine subject to Section 4.3.

6.3.1.6	An engine with an operating exhaust control system that has been
certified in accordance with Section 9.0 Exhaust Control System
Certification Requirements.

6.3.2	Demonstrate compliance with applicable limits, ppmv or percent
reduction, in accordance with the test methods in Section 6.4, as
specified below:

6.3.2.1	By the applicable date specified in Section 5.1.1, Section
5.1.2, Section 7.3, Section 7.4, Section 7.5, or Section 7.6 and at
least once every 24 months thereafter, except for an engine subject to
Section 6.3.2.2.

 	By the applicable date specified in Section 5.1.1, Section 5.1.2,	
Section 7.3, Section 7.4, Section 7.5, or Section 7.6 and at least

once every 60 months thereafter, for an AO spark-ignited engine that has
been retro-fitted with a catalytic emission control device and is not
subject to the requirements of Section 8.0.  

	6.3.2.3	A portable NOx analyzer may be used to show initial compliance
with the applicable limits/standards in Section 5.1 for AO spark-ignited
engines, provided the criteria specified in Sections 6.3.2.3.1 to
6.3.2.3.5 are met, and a source test is conducted in accordance with
Section 6.3.2 within 12 months from the required compliance date. 

6.3.2.3.1.	A minimum of 15 minutes of runtime must be measured with data
recorded at a minimum of 15, evenly spaced time intervals.  Compliance
is to be determined with the arithmetic average of the oxygen-corrected
data.

6.3.2.3.2. The analyzer shall be calibrated, maintained, and operated in
accordance with the manufacturer’s specifications and recommendations
or a protocol approved by the APCO.  Analyzer calibration records shall
be made available at the District’s request.

6.3.2.3.3.	The analyzer shall be checked with EPA protocol span gas at
the beginning and end of each test day.  The results of these checks
shall be recorded and copies submitted to the District with each engine
test.  If the analyzer exhibits more than a 10% deviation from the span
check, the instrument must be re-calibrated.  Any analysis performed
prior to an end-of-day span check failure shall be void.

6.3.2.3.4.	The test results of each engine, including span check
results, shall be submitted to the District within 30 days of the test
date.  Test results shall clearly identify the engine tested including
owner, location, permit or registration number, manufacturer, model, and
serial number.

6.3.2.3.5. 	The analyzer utilized for each check shall be clearly
identified in the material submitted with the test results. 
Identification shall include manufacturer and serial number of the
analyzer used, and the last calibration date.

6.3.3	Conduct emissions source testing with the engine operating either
at conditions representative of normal operations or conditions
specified in the Permit-to-Operate or Permit-Exempt Equipment
Registration.  For emissions source testing performed pursuant to
Section 6.3.2 for the purpose of determining compliance with an
applicable standard or numerical limitation, the arithmetic average of
three (3) 30-consecutive-minute test runs shall apply.  If two (2) of
three (3) runs are above an applicable limit, the test cannot be used to
demonstrate compliance with an applicable limit.   VOC shall be reported
as methane.  VOC, NOx, and CO concentrations shall be reported in ppmv,
corrected to 15 percent oxygen.  For engines that comply with a percent
reduction limit in Table 1, the percent reduction of NOx emissions shall
also be reported.  

6.3.4	In addition to other information, the source test protocol shall
describe which critical parameters will be measured and how the
appropriate range for these parameters shall be established.  The range
for these parameters shall be incorporated into the I&M plan. 

6.3.5	Engines that are limited by Permit-to-Operate or Permit-Exempt
Equipment Registration condition to be fueled exclusively with PUC
quality natural gas shall not be subject to the reoccurring source test
requirements of Section 6.3.2 for VOC emissions.

6.3.6	Representative Testing

For spark-ignited engines, in lieu of compliance with the applicable
requirements of Section 6.3.2, compliance with the applicable emission
limits in Section 5.1 shall be demonstrated by submittal of annual
emission test results, within 30 days of the test date, to the District,
from a unit or units that represents a specified group of units,
provided all of the following are requirements are satisfied:

6.3.6.1 	The units are located at the same stationary source;

6.3.6.2  	The units were produced by the same manufacturer, have the
same	model number or other manufacturer’s designation in common, and
have the same rated capacity and operating specifications;

6.3.6.3	The units are operated and maintained in a similar manner; and

6.3.6.4	At least 20% of the total number of units are tested during each
	annual test cycle.

The District, based on documentation submitted by the stationary

source:	

6.3.6.5.1	Determines that the margin of compliance for the identical
units tested is significant and can be maintained on an on-going basis;
or

	6.3.6.5.2  Determines based on a review of sufficient emissions data
that, though the margin of compliance is not substantial, other factors
allow for the determination that the variability of emissions for
identical tested units is low enough for confidence that the untested
unit will be in compliance.  These factors may include, but are not
limited to, the following:

6.3.6.5.2.1 Historical records at the tested unit 	showing consistent
invariant load;

6.3.6.5.2.2	Fuel characteristics yielding low variability and therefore
assurance that emissions will be constant and below allowable levels;

6.3.6.5.2.3	Statistical analysis of a robust emissions data set
demonstrate sufficiently low variability to convey assurance that the
margin of compliance, though small, is reliable.  

6.3.6.6	Should any of the representative units exceed the required
emission limits, or if the District notifies the operator that the
criteria in Sections 6.3.6.1 through 6.3.6.5 have not been fulfilled,
each of the units in the group shall individually demonstrate compliance
by emissions testing.  Failure to complete emissions testing within 90
days of the failed test shall result in the untested units being in
violation of this rule.  After compliance with the requirements of
Section 6.3.6.6 has been demonstrated, subsequent source testing shall
be performed pursuant to Sections 6.3.2 or 6.3.6.

6.4	Test Methods

Compliance with the requirements of Section 5.0 shall be determined, as
required, in accordance with the following test procedures or any other
method approved by EPA and the APCO: 

6.4.1	Oxides of nitrogen - EPA Method 7E, or ARB Method 100.

6.4.2	Carbon monoxide - EPA Method 10, or ARB Method 100.

6.4.3	Stack gas oxygen  - EPA Method 3 or 3A, or ARB Method 100.

6.4.4	Volatile organic compounds - EPA Method 25A or 25B, or ARB Method
100.  

6.4.5	Operating horsepower determination - any method approved by EPA
and the APCO. 

6.5	Inspection and Monitoring (I&M) Plan  

The owner of an engine that is subject to the requirements of Section
5.1 or the requirements of Section 8.0, except for an engine specified
in Section 6.5.1, shall submit to the APCO for approval, an I&M plan
that specifies all actions to be taken to satisfy the following
requirements and the requirements of Section 5.6.  The actions to be
identified in the I&M plan shall include, but are not limited to, the
information specified below: 

6.5.1	The requirements of Section 6.5.2 through Section 6.5.9 shall not
apply to any of the following engines:

6.5.1.1	A certified compression-ignited engine that has not been
retro-fitted with an exhaust control and is not subject to the
requirements of Section 8.0.

6.5.1.2	A certified spark-ignited engine that has not been retro-fitted
with an exhaust control and is not subject to the requirements of
Section 8.0. 

6.5.1.3	An AO spark-ignited engine that has not been retro-fitted with a
catalytic emission control device and is not subject to the requirements
of Section 8.0. 

6.5.1.4	An engine subject to Section 4.2.

6.5.1.5	An engine subject to Section 4.3.

6.5.1.6	An engine with an operating exhaust control system that has been
certified in accordance with Section 9.0 Exhaust Control System
Certification Requirements.

6.5.2	Procedures requiring the owner or operator to establish ranges for
control equipment parameters, engine operating parameters, and engine
exhaust oxygen concentrations that source testing has shown result in
pollutant concentrations within the rule limits.  

6.5.3	Procedures for monthly inspections as approved by the APCO.  The
applicable control equipment parameters and engine operating parameters
will be inspected and monitored monthly in conformance with a regular
inspection schedule listed in the I&M plan.  

6.5.4	Procedures for the corrective actions on the noncompliant
parameter(s) that the owner or operator will take when an engine is
found to be operating outside the acceptable range for control equipment
parameters, engine operating parameters, and engine exhaust NOx, CO,
VOC, or oxygen concentrations.  

6.5.5	Procedures for the owner or operator to notify the APCO when an
engine is found to be operating outside the acceptable range for control
equipment parameters, engine operating parameters, and engine exhaust
NOx, CO, VOC, or oxygen concentrations.  

6.5.6	Procedures for preventive and corrective maintenance performed for
the purpose of maintaining an engine in proper operating condition.  

6.5.7	Procedures and a schedule for using a portable NOx analyzer to
take NOx emission readings pursuant to Section 5.6.9.

6.5.8	Procedures for collecting and recording required data and other
information in a form approved by the APCO including, but not limited
to, data collected through the I&M plan and the monitoring systems
described in Sections 5.6.1 and 5.6.2.  Data collected through the I&M
plan shall have retrieval capabilities as approved by the APCO.

6.5.9	Procedures for revising the I&M plan.  The I&M plan shall be
updated to reflect any change in operation.  The I&M plan shall be
updated prior to any planned change in operation.  An engine owner that
changes significant I&M plan elements must notify the District no later
than seven days after the change and must submit an updated I&M plan to
the APCO no later than 14 days after the change for approval.  The date
and time of the change to the I&M plan shall be recorded in the engine
operating log.  For new engines and modifications to existing engines,
the I&M plan shall be submitted to and approved by the APCO prior to
issuance of the Permit-to-Operate or Permit-Exempt Equipment
Registration.  The owner of an engine may request a change to the I&M
plan at any time.  

7.0	Compliance Schedules

7.1	Loss of Exemption 

The owner of an engine which becomes subject to the emission
limits/standards of this rule through loss of exemption shall not
operate the subject engine, except as required for obtaining a new or
modified Permit-to-Operate or Permit-Exempt Equipment Registration for
the engine, until the owner demonstrates that the subject engine is in
full compliance with the requirements of this rule.

7.2	Permanent Removal of an Engine 

	The owner of an engine who elects to permanently remove the engine from
service shall comply with all of the following conditions:

7.2.1	Comply with all applicable requirements of this rule until the
engine is permanently removed from service; 

7.2.2	Submit a letter to the APCO no later than 14 days before the
engine is permanently removed from service, stating the intent to
permanently remove the engine from service.  The engine removal letter
can be submitted with the emission control plan, if any; and 

7.2.3	Permanently remove the engine from service and officially
surrender the Permit-to-Operate or Permit-Exempt Equipment Registration,
if any, to the APCO no later than 30 days after the engine is
permanently removed from service.  

7.3	Compliance Schedule for an AO Compression-Ignited Engine 

7.3.1	Compliance Schedule - Submission of Emission Control Plan, I&M
Plan, Permit-Exempt Equipment Registration Application and
Authority-to-Construct for an AO Compression-Ignited Engine 

7.3.1.1	The owner of an engine that is subject to Section 4.2 or Section
4.3 and that is required to submit an Emission Control Plan, an I&M
Plan, or an Authority-to-Construct in order to comply with the
requirements of Rule 4702, shall submit such document(s) no later than
January 1, 2006.

7.3.1.2	The owner of an engine that is subject to Section 5.1 and that
is required to submit an Authority-to-Construct application in order to
comply with the requirements of Rule 4702, shall submit the
Authority-to-Construct application, and any required Emission Control
Plan or I&M Plan, no later than six months before the engine is required
to be in compliance with the requirements of Section 5.1 of Rule 4702.

7.3.1.3  The owner of an engine that is subject to Section 5.1 and that
is required to submit a Permit-Exempt Equipment Registration application
in order to comply with the requirements of Rule 4702, shall submit the
Permit-Exempt Equipment Registration application, and any required
Emission Control Plan or I&M Plan, no later than three months before the
engine is required to be in compliance with the requirements of Section
5.1 of Rule 4702.

7.3.2	Compliance Schedule - Monitoring and Recordkeeping for an AO
Compression-Ignited Engine Subject to Section 5.1 and Section 5.7

On and after June 1, 2006, the owner of an engine that is subject to
Section 5.1 and Section 5.7 of Rule 4702 shall be in compliance with the
requirements of Section 5.7, Section 6.2.1.1, and Section 6.2.1.2.  

7.3.3	Compliance Schedule - General for an AO Compression-Ignited Engine

7.3.3.1	On and after January 1, 2006, unless otherwise specified, the
owner of an engine that is subject to the requirements of Section 4.2 or
Section 4.3 of Rule 4702 shall be in full compliance with Rule 4702.  

7.3.3.2	Unless otherwise specified, the owner of an engine that is
subject to the requirements of Section 5.1 of Rule 4702 shall be in full
compliance with Rule 4702 by the indicated dates pursuant to Section
5.1.2.  

7.4	Compliance Schedule for an AO Spark-Ignited Engine

7.4.1	Compliance Schedule - Submission of Emission Control Plan, I&M
Plan, Permit-Exempt Equipment Registration Application and
Authority-to-Construct for an AO Spark-Ignited Engine

7.4.1.1	The owner of an engine that is subject to Section 4.2 or Section
4.3 and that is required to submit an Emission Control Plan, an I&M
Plan, or an Authority-to-Construct in order to comply with the
requirements of Rule 4702, shall submit such document(s) no later than
January 1, 2006.

7.4.1.2	The owner of an engine that is subject to Section 5.1 and that
is required to submit an Authority-to-Construct application in order to
comply with the requirements of Rule 4702, shall submit the
Authority-to-Construct application, and any required Emission Control
Plan or I&M Plan, by June 1, 2006, or six months before the engine is
required to be in compliance with the requirements of Section 5.1 of
Rule 4702, whichever is later.

The owner of an engine that is subject to Section 5.1 and that is
required to submit a Permit-Exempt Equipment Registration application in
order to comply with the requirements of Rule 4702, shall submit the
Permit-Exempt Equipment Registration application, and any required
Emission Control Plan or I&M Plan by January 1, 2007, or three months
before the engine is required to be in compliance with the requirements
of Section 5.1 of Rule 4702, whichever is later.

7.4.2	Compliance Schedule - Monitoring and Recordkeeping for an AO
Spark-Ignited Engine Subject to Section 5.1 and Section 5.7

On and after June 1, 2006, the owner of an engine that is subject to
Section 5.1 and Section 5.7 of Rule 4702 shall be in compliance with the
requirements of Section 5.7.3 through Section 5.7.5, Section 6.2.1.1,
and Section 6.2.1.2.  

7.4.3	Compliance Schedule - General for an AO Spark-Ignited Engine

7.4.3.1	On and after June 1, 2006, unless otherwise specified, the owner
of an engine that is subject to the requirements of Section 4.2 or
Section 4.3 of Rule 4702 shall be in full compliance with Rule 4702.

  

7.4.3.2	Unless otherwise specified, the owner of an engine that is
subject to the requirements of Section 5.1 of Rule 4702 shall be in full
compliance with Rule 4702 by the indicated dates pursuant to Section
5.1.1.  

7.5	Compliance Schedule for a Non-AO Compression-Ignited Engine 

7.5.1	Compliance Schedule - Submission of Emission Control Plan, I&M
Plan, and Authority-to-Construct for a Non-AO Compression-Ignited Engine

7.5.1.1	The owner of an engine that is subject to Section 4.2 or Section
4.3 and that is required to submit an Emission Control Plan, an I&M
Plan, or an Authority-to-Construct in order to comply with the
requirements of Rule 4702, shall submit such document(s) no later than
June 1, 2006.

7.5.1.2	The owner of an engine that is subject to Section 5.1 and that
is required to submit an Emission Control Plan, an I&M Plan, or an
Authority-to-Construct in order to comply with the requirements of Rule
4702, shall submit such document(s) by June 1, 2006 or six months before
the engine is required to be in compliance with the requirements of
Section 5.1 of Rule 4702, whichever is later.

7.5.2	Compliance Schedule - General for a Non-AO Compression-Ignited
Engine 

7.5.2.1	On and after June 1, 2006, unless otherwise specified, the owner
of an engine that is subject to the requirements of Section 4.1, Section
4.2, or Section 4.3 of Rule 4702 shall be in full compliance with Rule
4702.  

7.5.2.2	Unless otherwise specified, the owner of an engine that is
subject to the requirements of Section 5.1 of Rule 4702 shall be in full
compliance with Rule 4702 by the indicated dates pursuant to Section
5.1.2.  

7.5.2.3	The owner of an engine that is subject to the requirements of
Section 4.0 or Section 5.0 of Rule 4701 (Internal Combustion Engines –
Phase 1) shall no longer be subject to the requirements of Rule 4701
pursuant to the following requirements:

7.5.2.3.1		For an engine that is subject to the requirements of Section
4.1, Section 4.2, or Section 4.3 of Rule 4702, the requirements of Rule
4701 shall not apply effective on the date that such engine is required
to be in full compliance with Rule 4702, or

7.5.2.3.2		For an engine that is subject to the requirements of Section
5.1 of Rule 4702, the requirements of Rule 4701 shall not apply
effective on the date that such engine is required to be in full
compliance with Rule 4702.

7.6	Compliance Schedule for a Non-AO Spark-Ignited Engine 

7.6.1	Compliance Schedule - Submission of Emission Control Plan, I&M
Plan, and Authority-to-Construct for a Non-AO Spark-Ignited Engine

Effective on and after June 16, 2005, the owner of an engine that is
required to submit an Emission Control Plan, an I&M Plan, or an
Authority-to-Construct in order to comply with the requirements of Rule
4702, shall submit such document(s) no later than six months before the
engine is required to be in full compliance with Rule 4702.

7.6.2	Compliance Schedule – Emission Limits for a Non-AO Spark-Ignited
Engine

The owner of a non-AO spark-ignited engine subject to the requirements
of Rule 4702 shall not operate the engine unless the owner demonstrates
and maintains the engine in compliance with the applicable requirements
of Rule 4702 by the indicated dates below.

Compliance Schedule 1 – Non-AO Spark-Ignited Engine

Quantity of Non-AO Spark-Ignited Engines to be in Compliance at a
Stationary Source	Compliance Date

a.  25% or more of the total number of non-AO spark-ignited engines at a
stationary source on June 1, 2005 	6/1/05

b.  62.5% or more of the total number of non-AO spark-ignited engines at
a stationary source on June 1, 2006	6/1/06

c.  100% of the total number of non-AO spark-ignited engines at a
stationary source on June 1, 2007	6/1/07



For the purposes of Section 7.6, the total number of non-AO
spark-ignited engines at a stationary source on a specified date
includes those non-AO spark-ignited engines subject to Rule 4702
pursuant to Section 2.0 and excludes any engines exempt from Rule 4702
pursuant to Section 4.1 on the specified date.

7.6.3	Compliance Schedule - General for a Non-AO Spark-Ignited Engine 

7.6.3.1	On and after January 1, 2006, unless otherwise specified, the
owner of an engine that is subject to the requirements of Section 4.1 of
Rule 4702 shall be in full compliance with Rule 4702.  

7.6.3.2	Unless otherwise specified, the owner of an engine subject to
the requirements of Rule 4702 shall be in full compliance with Rule 4702
by the applicable compliance date pursuant to Section 7.6.2.  

7.6.3.3	The owner of an engine that is subject to the requirements of
Rule 4701 shall no longer be subject to the requirements of Rule 4701
pursuant to the following requirements:

7.6.3.3.1	For an engine that is subject to the requirements of Section
4.1 of Rule 4702, the requirements of Rule 4701 shall not apply
effective on and after January 1, 2006, or

7.6.3.3.2	For an engine that is subject to the requirements of Section
4.2, Section 4.3, or Section 5.1 of Rule 4702, the requirements of Rule
4701 shall not apply effective on the date that such engine is required
to be in full compliance with Rule 4702.

8.0	Alternative Emission Control Plan (AECP)

An owner may comply with the NOx emission requirements of Section 5.1
for a group of engines by meeting the requirements below.  An owner that
is subject to the requirements below shall also comply with all the
applicable requirements of Sections 5.0, 6.0, and 7.0.  An engine that
is not subject to Section 5.1 is not eligible for inclusion in an AECP.

8.1	During any 7 (seven) consecutive calendar day period, the owner
shall operate all engines in the AECP to achieve an actual aggregate NOx
emission level that is not greater than 90 percent of the NOx emissions
that would be obtained by controlling the engines to comply individually
with the NOx limits in Section 5.1.  The owner shall operate engines in
the AECP such that 

AEActual  <= 0.90 (AELimit)

and shall notify the APCO within 24 hours of any violation of this
section.

8.1.1	The actual aggregate NOx emissions (AEActual) is the sum of the
actual NOX emissions, over a 7 (seven) consecutive calendar day period,
from all engines in the AECP which were actually operated during that
period.  AEActual shall be calculated as follows:

 

where:

i 	identifies each engine in the AECP.

EFi 	is the NOx emission factor of the engine established pursuant to
Section 8.2 and approved by the APCO.

Fi 	is the actual total fuel used by the engine during the 7 (seven)
consecutive calendar day period.

ki 	is a constant used to convert an engine’s fuel use and NOx
emission factor to the amount of NOx emitted.  ki is dependent on the
engine and the pollutant emitted.  Calculation of ki shall be
accomplished using 40 CFR Part 60, Appendix A, Method 19, or an
equivalent method approved by EPA, ARB and the APCO.

8.1.2	The estimated aggregate NOx emissions limit (AELimit) is the sum
of the NOx emissions, over a 7 (seven) consecutive calendar day period,
for the same engines in the AECP which were actually operated during the
same period as considered in Section 8.1.1, calculated with the NOx
limits of Section 5.1 and the actual fuel usage during that 7 (seven)
consecutive calendar day period.  AELimit shall be calculated as
follows:

 

where:

i 	identifies each engine in the AECP.

ELi 	is the NOx emission limit from Section 5.1 for each engine.

Fi 	is the actual total fuel used by the engine during the 7 (seven)
consecutive calendar day period.

ki 	is a constant used to convert an engine’s fuel use and NOx
emission limit to the amount of NOx emitted.  ki is dependent on the
engine and the pollutant emitted.  Calculation of ki shall be
accomplished using 40 CFR Part 60, Appendix A, Method 19, or an
equivalent method approved by EPA, ARB and the APCO. 

8.1.3	Only engines in the AECP which were operated during the 7 (seven)
consecutive calendar day period shall be included in the calculations of
AELimit and AEActual.

8.1.4	The owner shall, at least one time each day the AECP is used,
calculate and record the actual aggregate NOx emissions (AEActual) and
the aggregate NOx emission limit (AELimit) for the preceding 7 (seven)
consecutive calendar day period.

8.2	The owner shall establish a NOx emission factor limit for each
engine.  The established NOx emission factor of an engine shall be no
less than the NOx emission factor of the engine from the most recent
source test conducted pursuant to Section 6.3 and approved by the APCO. 
The owner shall not operate an AECP engine in such a manner that NOx
emissions exceed the established NOx emission factor of the engine.  

8.3	The owner shall submit the AECP to the APCO at least 18 months
before compliance with the emission limits in Section 5.1 is required. 
The AECP shall:

8.3.1	Not be implemented prior to APCO approval.

8.3.2	Be enforceable on a daily basis by the District.

8.3.3	Contain any information necessary to determine eligibility of the
engines for alternative emission control, including, but not limited to:

8.3.3.1	A list of engines subject to the AECP.  All engines in an AECP
shall be under the operational control of a single owner and shall be
located at a single stationary source.

8.3.3.2	The NOx emission factor established by the engine owner for each
engine pursuant to Section 8.2.  

8.3.3.3	The estimated aggregate NOx emissions calculated according to
Section 8.1.2.

8.3.4	Present the methodology for determining equivalency of actual NOx
emissions under the proposed AECP as compared to the estimated NOx
emissions allowed by this rule.

8.3.5	Detail the method of recording and verifying daily compliance with
the AECP.

8.3.6	Demonstrate to the satisfaction of the APCO that the difference
between the NOx emission limits of this rule and any lower actual NOx
emissions will not be used to increase emissions from the same or
another source.

8.3.7	Demonstrate that the engines subject to the requirements of
Section 5.1 are in compliance with or on an approved schedule for
compliance with all applicable District rules.

8.4	The owner shall submit an updated or modified AECP for approval by
the APCO prior to any of the following:

8.4.1	Modification of the engine(s) which would require an
Authority-to-Construct.

8.4.2	When new or amended rules are adopted which regulate the emissions
from the engines.

8.4.3	When the NOx emission factor established by the engine owner for
an engine pursuant to Section 8.2 is modified.

8.5	In addition to the records kept pursuant to Section 6.2, the owner
shall maintain records, on a daily basis, of the parameters needed to
demonstrate compliance with the applicable NOx emission limits when
operating under the AECP.  These records shall be retained for at least
five years, shall be readily available, and be made available to the
APCO upon request.  The records shall include, but are not limited to,
the following for each engine unless otherwise indicated:

8.5.1	Total hours of operation.

8.5.2	Type and quantity (cubic feet of gas or gallons of liquid) of fuel
used.

8.5.3	The actual NOx emissions limits to be included in the calculation
of AEActual  pursuant to Section 8.1.1.

8.5.4	The actual aggregate NOx emissions (AEActual) for all the engines
in the AECP calculated pursuant to Section 8.1.1.

8.5.5	The estimated NOx emissions limits to be included in the
calculation of AELimit  pursuant to Section 8.1.2.

8.5.6	The estimated aggregate NOx emissions (AELimit) for all the
engines in the AECP calculated pursuant to Section 8.1.2.

8.5.7	The comparison of the actual aggregate NOx emissions (AEActual)
for all the engines in the AECP and 90 percent of the estimated
aggregate NOx emissions (AELimit) for all the engines in the AECP to
demonstrate compliance with Section 8.1.

8.5.8	Any other parameters needed to demonstrate daily compliance with
the applicable NOx emission limits when operating under the AECP.

8.6	For the purpose of determining the quantity of spark-ignited engines
in compliance pursuant to Section 7.6, a spark-ignited engine in an AECP
shall not be considered to be in compliance until all spark-ignited
engines in the AECP that have been designated to meet more stringent NOx
emission factors pursuant to Section 8.2 are in compliance with the
rule.

9.0	Exhaust Control System Certification Requirements

9.1	To be considered for APCO certification, the manufacturer or
operator shall comply with all of the following requirements:  

9.1.1	Certification shall be based upon the emission source testing
results of a specific exhaust control system.

9.1.2	A source testing protocol shall be submitted in accordance with
the provisions of Rule 1081 (Source Sampling) for approval by the APCO
prior to conducting the source test.  The source testing protocol
approved by the APCO shall be strictly adhered to during certification
source testing.

9.1.3	Source testing shall be conducted over the range of operating
parameters for which the unit(s) will be operated.

9.1.4	The source testing results shall demonstrate compliance with the
emission limits of this rule for each model of exhaust control system(s)
to be certified.

9.1.5	The source testing procedure and reports shall be prepared by an
ARB- approved independent testing laboratory, and shall contain all the
elements identified in the APCO-approved source testing protocol.

9.1.6	Source testing shall be conducted no more than 90 days prior to
the date of submission of request for certification by the APCO.  

9.1.7	Any additional supporting information required by the APCO to
address other performance parameters.

9.2	The manufacturer or operator requesting certification shall submit
to the APCO the following information:

9.2.1	Copies of the source testing results conducted pursuant to the
requirements of Section 9.1, and other pertinent technical data to
demonstrate compliance with the emission limits of this rule.  

9.2.2	The applicant shall sign and date the statement attesting to the
accuracy of all information in the statement.   

9.2.3	Name and address of the exhaust control system manufacturer or
operator, brand name of the exhaust control unit, model number, and
description of model of system(s) being certified.

9.3	The APCO will only approve an application for certification to the
extent that the requirements of Sections 9.1 through 9.2 are met and the
source testing results demonstrate that the emission limits of this rule
are met.

9.4	The APCO-approved certification is valid only for the range of
operating parameters and conditions for which certification is issued. 

 

9.5	The APCO shall publish a list of certified exhaust control systems
after the certification process is completed.

	

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