1. Section 240.102?Definitions
    2. Section 240.124?Vehicle Exhaust Emission Standards (Repealed)
    3. Section 240.125?Compliance Determination (Repealed)
    4. Section 240.162?Vehicle Exhaust Emission Start-Up Standards
    5. Section 240.TABLE A?Vehicle Exhaust Emission Start-Up Standards

ILLINOIS POLLUTION CONTROL BOARD
December 7, 2000
IN THE MATTER OF:
ENHANCED VEHICLE INSPECTION AND
MAINTENANCE (I/M) REGULATIONS:
AMENDEMENTS TO 35 ILL. ADM. CODE
PART 240
)
)
)
)
)
)
R01-12
(Rulemaking - Air)
Final Order. Adopted Rule.
OPINION AND ORDER OF THE BOARD (by C.A. Manning):
On August 21, 2000, the Illinois Environmental Protection Agency (Agency) filed with
the Board proposed amendments to the enhanced vehicle inspection and maintenance (I/M)
regulations at 35 Ill. Adm. Code 240. The Agency’s proposal was filed under Section 13B-20(a)
of the Vehicle Emissions Law of 1995 (Vehicle Emissions Law) (625 ILCS 5/13B-1
et seq.
(1998)). The Vehicle Emissions Law provides that Section 27(b) of the Environmental
Protection Act (Act) (415 ILCS 5/27(b) (1998)) and the rulemaking provisions of the
Administrative Procedure Act (APA) (5 ILCS 100/1-1
et seq.
(1998)) “shall not apply to rules
adopted by the Board under this subsection.” 625 ILCS 5/13B-20(a) (1998). Additionally,
Section 13B-20(a) requires the Board to adopt rules within 120 days after it receives the
Agency’s proposal, that is, on or before December 19, 2000.
On August 24, 2000, the Board accepted the proposal for hearing and directed the
proposal be filed for publication in the
Illinois Register
as a proposal for public comment. The
proposal for public comment appeared in the
Illinois Register
on September 15, 2000, 24 Ill.
Reg. 13820.
The Board held two public hearings in this matter. The first hearing was held before
Hearing Officer Richard McGill on October 11, 2000, in Chicago, Illinois. The second hearing
was held before Hearing Officer Andrew Boron on October 20, 2000, in Collinsville, Illinois. At
both hearings the Agency offered testimony in support of its proposal. Specifically, the following
Agency personnel participated in the Board proceedings: Elizabeth R. Tracy, manager of the
Division of Vehicle Inspection and Maintenance, Bureau of Air; Christopher P. Demeroukas,
attorney, Bureau of Air; and James Matheny, manager of technical services in the Division of
Inspection and Maintenance, Bureau of Air. On November 9, 2000, the Agency filed public
comments (PC 1). The Board received no other testimony or public comments.
The Board today adopts amendments to 35 Ill. Adm. Code 240. The amendments include
changes to the proposal suggested by the Agency and the Joint Committee on Administrative
Rules, as well as a few other minor changes.

2
FEDERAL STATUTORY BACKGROUND
Sections 182(b) and (c) of the federal Clean Air Act (CAA) (42 U.S.C. §§ 7511(a), (b),
(c)) require states to implement vehicle “inspection and maintenance” (I/M) programs in areas
that do not meet National Ambient Air Quality Standards (NAAQS) for ozone or carbon
monoxide. Areas that do not meet NAAQS are referred to as “nonattainment” areas.
The CAA requires “basic” I/M programs in “moderate” and “marginal” ozone
nonattainment areas with exisiting I/M programs. It requires “enhanced” I/M programs in
“serious,” “severe,” and “extreme” ozone nonattainment areas with a population of 200,000 or
more. The CAA also requires states to submit, for the approval of the United States
Environmental Protection Agency (USEPA), revisions of their State Implementation Plans (SIPs)
that describe a satisfactory I/M program and assure that the I/M program will be implemented.
In Illinois, two areas do not meet the NAAQS for ozone: (1) the Chicago metropolitan
nonattainment area, which is a severe nonattainment area; and (2) the Metro-East St. Louis
nonattainment area, which is a moderate nonattainment area. Under the Vehicle Emission
Inspection Law, the Agency has proposed, and the Board has adopted an enhanced I/M program
for these two nonattainment areas in 35 Ill. Adm. Code 240. See Enhanced Vehicle Inspection
and Maintenance (I/M) Regulations: Amendments to 35 Ill. Adm. Code 240
(July 8, 1998), R98-24; (December 1, 1994), R94-20; (December 1, 1994), R94-19.
AGENCY PROPOSAL
The Agency proposes amendments to 35 Ill. Adm. Code 240 with respect to the enhanced
I/M program for the Chicago metropolitan and Metro-East St. Louis nonattainment areas. See
Agency Statement of Reasons at 3-4. The Agency describes its proposed changes as follows:
1.
 
delaying the implementation of “pass/fail” on-board diagnostic testing from
January 1, 2001, to January 1, 2002;
2.
 
retaining current, more lenient “start-up” hydrocarbon and carbon monoxide
emission standards for model year 1981 through model year 1986 light duty
vehicles, light duty trucks 1, and light duty trucks 2; and
3.
 
adding several definitions, incorporating USEPA guidance by reference,
eliminating outdated provisions, and clarifying certain provisions. See Agency
Statement of Reasons at 3, 5-9, 11-13; Agency Summary of Testimony of
Elizabeth R. Tracy at 1-2.
The Agency describes these proposed changes as “relatively minor adjustments to the
Enhanced I/M program.” Agency Statement of Reasons at 5. The Agency states that it is
proposing the amendments “to enable Illinois to meet federal and state mandated enhanced
emissions testing requirements.”
Id.
at 3. The Agency also states that its proposal is “designed

3
to promote the acceptance of and adherence to the enhanced I/M program, and to refine certain
test requirements . . . .”
Id.
at 5.
THE ADOPTED AMENDMENTS
Federal regulations require the adoption by states of standards that result in a reduction of
vehicle emissions through testing procedures meeting, or exceeding, the amount of emissions
that would be reduced if its “model” I/M program design was implemented. USEPA requires
certain “design elements” to be a part of any enhanced I/M plan, but allows states to vary certain
program inputs as long as the plan achieves the same or greater reductions in emissions than
those required by USEPA’s applicable performance standard. The Board has adopted certain
required standards for Illinois’ enhanced I/M program, and the Agency has adopted certain
necessary procedural rules at 35 Ill. Adm. Code 276.
The amendments the Board is adopting today are designed to promote the acceptance of
and adherence to the enhanced I/M program, and to refine certain test requirements by retaining
current “start-up” emissions standards for certain categories of older vehicles, and by extending
for one year the implementation of “pass/fail” on-board diagnostic testing, and to make necessary
clarifications to the current rule.
Currently, the Agency’s emissions testing contractor is performing “advisory” on-board
diagnostic testing. This consists of attempting to gather information from 1996 and newer
vehicles presented for testing with on-board diagnsotic ports to determine if one or more
emissions control components or systems is not functioning properly and is in need of repair.
The testing is “advisory,” in that there is no consequence to a motorist whose vehicle fails a test.
Currently a motorist is simply notified whether his or her vehicle would have passed or failed had
the test been a mandatory part of the inspection. Once the “pass/fail” test becomes mandatory
rather than advisory, the consequence of failure can be as severe as suspension of either the
vehicle owners driving privileges or vehicle registration. Delaying the beginning of “pass/fail”
on-board diagnostic testing will allow the Agency to address problems with the acquisition and
analysis of data from certain vehicles’ on-board diagnostic ports.
The Agency notes the proposed beginning of “pass/fail” on-board diagnostic testing
should be “no later than January 1, 2002” instead of “January 1, 2002,” as referenced incorrectly
both in the statement of reasons and in the proposed amendatory text at proposed amendments to
Section 240.191. Exh. 1 at 1.
  
At hearing, the Board expressed concern about the fairness to the
public of the “no later than” deadline of Section 240.191. Tracy testified the Agency would have
“an adequate public education and information program” prior to initiating the “pass/fail” on-
board diagnostic testing. Tr. 1 at 23. The Board continues to have concerns and accordingly
adopts the rule as originally proposed. If the Agency is prepared to being “pass/fail” on-board
diagnostic testing prior to January 1, 2002, the Agency can propose a revision to the rule at that
time.
In response to Board questions, additional changes have been made to the rule for clarity
and for the workability of the program. Although a majority of the changes were minor, the

4
Board suggested one noteworthy change, which the Agency notes in PC 1. In response to Board
concerns regarding proposed amendments to 240.162 and 240.163, the Agency agrees that its
proposal in both these sections should be revised to include specific dates. PC 1 at 1-2. The
Agency suggests revising Sections 240.162 and 240.163 to read:
Section 240.162 Vehicle Exhaust Emission Start-Up Standards
Vehicle exhaust emission start-up standards contained in Section 240.Table A of this Part
shall apply for all vehicles subject to inspection until January 31, 2001. two years after
the beginning of IM240 testing. Beginning February 1, 2001, these standards shall
continue to apply to all model year 1981 through model year 1987 LDV, LDT1, and
LDT2 vehicles. All standards are expressed in grams per mile (gpm).
Section 240.163 Vehicle Exhaust Emission Final Standards
Beginning February 1, 2001, vehicle Vehicle exhaust emission final standards contained
in Section 240.Table B of this part shall apply for all vehicles subject to inspection
beginning at the conclusion of testing using the start up vehicle exhaust emissions
standards required in Section 240.162 except for model year 1981 through model year
1987 LDV, LDT1, and LDT2 vehicles, which shall continue to use the standards
contained in Section 240.Table A of this Part as described in Section 240.162. All
standards are expressed in grams per mile (gpm).
CONCLUSION
As previously discussed, Sections 182(b) and (c) of the CAA (42 U.S.C. §§ 7511a(b), (c))
require states to implement vehicle “inspection and maintenance” I/M programs in areas that do
not meet NAAQS for ozone or carbon monoxide. Accordingly, the Board adopts the suggested
amendments to 35 Ill. Adm. Code 240 to bring the Illinois I/M program into conformity with all
CAA requirements. The rules adopted today incorporate all of the Agency’s suggested changes.
In general, the Board finds that the Agency proposal and supporting documentation
demonstrates that the proposal will enable Illinois to: (1) meet federal and state mandated
enhanced emissions testing requirements, and (2) promote the acceptance of and adherence to the
enhanced I/M program. Specifically, the Board amends the rules to delay the implementation of
“pass/fail” on-board diagnostic testing from January 1, 2001 to January 1, 2002. The Board also
amends the rules to retain current, more lenient “start-up” hydrocarbon and carbon monoxide
emission standards for model year 1981 through model year 1987 light duty vehicles, light duty
trucks 1, and light duty trucks 2. Finally, the Board amends the rules by adding several
definitions, eliminating outdated provisions, and clarifying certain provisions. Changes
suggested by the Joint Committee on Administrative Rules have also been incorporated.
ORDER

5
The Clerk is directed to cause filing with the Secretary of State and publication in the
Illinois Register
of the following adopted amendments to the Board’s I/M program at 35 Ill.
Adm. Code 240.
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE B: AIR POLLUTION
CHAPTER I: POLLUTION CONTROL BOARD
SUBCHAPTER k: EMISSION STANDARDS AND LIMITATIONS FOR MOBILE SOURCES
PART 240
MOBILE SOURCES
SUBPART A: DEFINITIONS AND GENERAL PROVISIONS
Section
240.101 Preamble
240.102 Definitions
240.103 Prohibitions
240.104 Inspection
240.105 Penalties
240.106 Determination of Violation
SUBPART B: EMISSIONS
Section
240.121 Smoke Emissions
240.122 Diesel Engine Emissions Standards for Locomotives
240.123 Liquid Petroleum Gas Fuel Systems
240.124 Vehicle Exhaust Emission Standards (Repealed)
240.125 Compliance Determination (Repealed)
SUBPART C: HEAVY-DUTY DIESEL SMOKE OPACITY STANDARDS AND TEST
PROCEDURES
Section
240.140 Applicability
240.141 Heavy-Duty Diesel Vehicle Smoke Opacity Standards and Test Procedures
SUBPART D: STEADY-STATE IDLE MODE TEST EMISSION STANDARDS
Section
240.151 Applicability

6
240.152 Steady-State Idle Mode Vehicle Exhaust Emission Standards
240.153 Compliance Determination
SUBPART E: TRANSIENT LOADED MODE TEST EMISSION STANDARDS
Section
240.161 Applicability
240.162 Vehicle Exhaust Emission Start-Up Standards
240.163 Vehicle Exhaust Emission Final Standards
240.164
240.165
Vehicle Exhaust Emission Fast-Pass Standards
Compliance Determination
SUBPART F: EVAPORATIVE TEST STANDARDS
Section
240.171 Applicability
240.172 Evaporative System Integrity Test Standards
240.173 Evaporative System Purge Test Standards (Repealed)
SUBPART G: ON-ROAD REMOTE SENSING TEST EMISSION STANDARDS
240.181 Applicability
240.182 On-Road Remote Sensing Emission Standards
240.183 Compliance Determination
SUBPART H: ON-BOARD DIAGNOSTIC TEST STANDARDS
240.191 Applicability
240.192 On-Board Diagnostic Test Standards
240.193 Compliance Determination
240.Appendix A Rule into Section Table
240.Appendix B Section into Rule Table
240.Table A Vehicle Exhaust Emission Start-Up Standards
240.Table B Vehicle Exhaust Emission Final Standards
240.Table C Vehicle Exhaust Emission Fast-Pass Standards
AUTHORITY: Implementing Sections 9, 10 and 13 and authorized by Section 27 and 28.5 of the
Environmental Protection Act [415 ILCS 5/9, 10, 13, and 27, and 28.5] and Section 13B-20 of
the Vehicle Emissions Inspection Law of 1995 [625 ILCS 5/13B-20]. (see Section 10 of P.A. 90-
475, effective August 16, 1997).

 
7
SOURCE: Adopted as Chapter 2: Air Pollution, Part VII: Mobile Sources, filed and effective
April 14, 1972; codified at 7 Ill. Reg. 13628; amended in R85-25, at 10 Ill. Reg. 11277,
effective June 16, 1986; amended in R90-20 at 16 Ill. Reg. 6184, effective April 7, 1992;
amended in R94-20 at 18 Ill. Reg. 18013, effective December 12, 1994; amended in R94-19 at
18 Ill. Reg. 18228, effective December 20, 1994; amended in R98-24 at 22 Ill. Reg. 13723,
effective July 13, 1998; expedited correction at 22 Ill. Reg. 21120, effective July 13, 1998.;
amended at 24 Ill. Reg. __________, effective ___________________.
BOARD NOTE: This part implements the Environmental Protection Act as of July 1, 1994.
NOTE: Capitalization denotes statutory language.
SUBPART A: DEFINTIONS AND GENERAL PROVISIONS
Section 240.102 Definitions
All terms which appear in this Part have the definitions specified in this Part and 35 Ill. Adm.
Code 201 and 211. Where conflicting definitions occur, the definitions of this Section apply in
this Part.
“Adjusted loaded vehicle weight (“ALVW”)” means the value of the vehicle curb
weight plus gross vehicle weight rating divided by two.
“Agency” means the Illinois Environmental Protection Agency.
"Diesel engine" means all types of internal-combustion engines in which
air is compressed to a temperature sufficiently high to ignite fuel injected
directly into the cylinder area.
"Diesel locomotive" means a diesel engine vehicle designed to move cars
on a railway.
“Evaporative system integrity test” means a test of a vehicle’s evaporative
system. The test shall either consist of a leak check of a vehicle’s fuel cap
with a fuel cap pressure decay tester (fuel cap pressure decay test), a fuel
cap leak flow tester (fuel cap leak flow test), or a visual functional check,
as applicable.
“Fuel cap” means a device used to seal a vehicle’s fuel inlet.
“Fuel cap leak flow test” means a test which may be performed in
accordance with this Part on a vehicle’s fuel cap using a fuel cap leak flow
tester to determine whether the vehicle complies with the evaporative
system emission standards of this Part.

8
“Fuel cap leak flow tester” means a device used to determine the leak flow
integrity of a vehicle’s fuel cap by comparing the measured leak flow of
the fuel cap with an established fuel cap leak flow standard.
“Fuel cap pressure decay test” means the test performed in accordance
with this Part on a vehicle’s fuel cap using a fuel cap pressure decay tester
to determine whether the vehicle complies with the evaporative system
emission standards of this Part.
“Fuel cap pressure decay tester” means a device used to determine the
pressure decay integrity of a vehicle’s fuel cap by monitoring the pressure
behind the fuel cap for a ten second period and comparing the measured
pressure decay of the fuel cap to an established fuel cap pressure decay
standard.
“Fuel cap visual functional test” means the test performed in accordance
with this Part on a vehicle’s fuel cap using visual analysis to determine
whether the vehicle complies with the evaporative system emission
standards of this Part.
"Full power position" means the throttle position at which the engine fuel
delivery is at maximum flow.
"Gross vehicle weight rating (GVWR)" means the value specified by the
manufacturer as the maximum design loaded weight of a single vehicle.
"Heavy duty vehicle" means any motor vehicle rated at more than 8500
pounds GVWR or that has a vehicle curb weight of more than 6000
pounds or that has a basic vehicle frontal area in excess of 45 square feet.
"High idle" means a vehicle operating condition with engine disconnected
from an external load (placed in either neutral or park) and operating at
speed of 2500 + 300 RPM.
“IM240” means the transient mass emissions inspection procedure that the
USEPA developed and has been implemented for use in the Illinois
Enhanced Vehicle Inspection and Maintenance Program. 240 refers to the
240 second maximum duration of the driving cycle that the vehicle
undergoes as it is positioned on the dynamometer and essentially driven
for the purpose of measuring the mass amount of emissions coming out of
the tail pipe.
"Idle mode" means that portion of a vehicle emission test procedure
conducted with the engine disconnected from an external load and
operating at minimum throttle.

9
"Initial idle mode" means the first of up to two idle mode sampling periods
during a steady-state idle mode test, during which exhaust emission
measurements are made with the vehicle in "as-received" condition.
"Light duty truck 1" means a motor vehicle rated at 6000 pounds
maximum GVWR or less and which has a vehicle frontal area of 45 square
feet or less, and which is designed primarily for purposes of transportation
of property or is a derivation of such a vehicle, or is designed primarily for
transportation of persons and has a capacity of more than 12 persons, or is
available with special features enabling off-street or off-highway operation
and use.
"Light duty truck 2" means a motor vehicle rated between 6001 and 8500
pounds maximum GVWR and which has a vehicle frontal area of 45
square feet or less, and which is designed primarily for purposes of
transportation of property or is a derivation of such a vehicle, or is
designed primarily for transportation of persons and has a capacity of more
than 12 persons, or is available with special features enabling off-street or
off-highway operation and use.
"Light duty vehicle" means a passenger car or passenger car derivative
capable of seating 12 passengers or fewer.
“Loaded mode” means that portion of a vehicle emission test procedure
conducted with the vehicle positioned and operating under load on a
chassis dynamometer.
"Loaded vehicle weight (LVW)" means the vehicle curb weight plus 300
pounds.
"Measured values" means five second running averages of exhaust
emission concentrations sampled at a minimum rate of twice per second.
"Model year" means the year of manufacture of a motor vehicle based
upon the annual production period as designated by the manufacturer and
indicated on the title and registration of the vehicle. If the manufacturer
does not designate a production period for the vehicle, then "model year"
means the calendar year of manufacture.
"Motor vehicle" as used in this Part, shall have the same meaning as in
Section 1-146 of the Illinois Vehicle Code [625 ILCS 5/1-146].
"Preconditioning mode" means a period of steady-state loaded mode or
high-idle operation conducted to ensure that the engine and emissions

10
control system components are operating at normal operating
temperatures, thus minimizing false failures caused by improper or
insufficient warm-up.
"Second-chance idle mode" means the second of two idle mode sampling
periods during a steady-state idle mode test, preceded by a preconditioning
mode and utilized as a second chance to pass idle exhaust emission
standards immediately following an initial idle mode failure.
"Smokemeter or opacimeter" means an optical instrument designed to
measure the opacity of smoke or diesel exhaust gases using the light
extinction method.
"Snap-idle cycle" means rapidly depressing the accelerator pedal from
normal idle to the full power position while the vehicle is in neutral,
holding the pedal in the position for no longer than ten seconds or until the
engine reaches maximum RPM, and fully releasing the pedal so that the
engine decelerates to normal idle.
"Steady-state idle test" means a vehicle emission test procedure consisting
of an initial idle mode measurement of exhaust emissions followed, if
necessary, by a loaded or high idle preconditioning mode and a second-
chance idle mode.
"Transient loaded mode test" or “IM240 testing” or “transient IM240
loaded mode exhaust emission test procedure” or “transient IM240 test
procedure” means a vehicle emissions test run on an inertial and power
absorbing dynamometer using USEPA's IM240 driving cycle consisting of
accelerations and decelerations simulating on-road driving conditions.
“Vehicle curb weight” means the actual vehicle weight plus standard
equipment and a full fuel tank.
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.104 Inspection
a)
All motor vehicles subject to inspection pursuant to Section 13A-104 of the
Vehicle Emissions Inspection Law [625 ILCS 5/13A-104] shall comply with the
exhaust emission standards for carbon monoxide and hydrocarbons set forth at
Section 240.124 of this Part.
b)
All motor vehicles subject to inspection pursuant to Section 13B-15 of the
Vehicle Emissions Inspection Law [625 ILCS 5/13B-15] shall comply with

 
11
applicable vehicle emission standards contained in Sections 240.152, 240.162,
240.163, 240.172, 240.182 and 240.192 of this Part.
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.105 Penalties
a) Any violations of Sections 240.103, 240.121, 240.122, and 240.123 of this Part
shall be subject to the penalties as set forth in Section 42 of the Act [415 ILCS
5/42].
b) Any violations of Sections 240.104(a) and 240.124 of this Part shall be subject to
the penalties as set forth in Sections 13A-112 and 13A-113 of the Vehicle
Emissions Inspection Law [625 ILCS 5/13A-112 and 13A-113].
c)
Any violations of Sections 240.104(b), 240.152, 240.162, 240.163, 240.172,
240.182, and 240.192 of this Part shall be subject to the penalties as set forth in
Sections 13B-55 and 13B-60 of the Vehicle Emissions Inspection Law.
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.106 Determination of Violation
a) Any violations of Sections 240.103, 240.121, 240.122, and 240.123 of this Part
shall be determined by visual observation or by a test procedure employing an
opacity measurement system as qualified by 35 Ill. Adm. Code 201, Subpart J.
b) Any violations of Sections 240.124, 240.152, 240.162, 240.163, 240.172,
240.182, or 240.192 of this Part shall be determined in accordance with test
procedures adopted by the Agency in 35 Ill. Adm. Code 276.
(Source: Amended at 24 Ill. Reg. , effective )
SUBPART B: EMISSIONS
Section 240.124 Vehicle Exhaust Emission Standards (Repealed)
a) Exhaust emissions from light duty vehicles shall not exceed the following
limitations:
Model Year
Carbon Monoxide
Hydrocarbons as
Hexane
(%)
(ppm)

 
12
1968 - 1971
9.0
900
1972 - 1974
8.0
800
1975 - 1977
7.0
700
1978 - 1979
6.0
600
1980
3.0
300
1981 and later
1.2
220
b)
 
Exhaust emissions from light duty trucks, which for the purposes of this subsection
means a motor vehicle rated at 8000 pounds gross vehicle weight or less which is
designed for carrying more than 10 persons or designed for the transportation of
property, freight or cargo, or is a derivative of such a vehicle, shall not exceed the
following limitations:
Model Year
Carbon Monoxide
Hydrocarbons as
Hexane
(%)
(ppm)
1968 - 1971
9.0
900
1972 - 1974
8.0
800
1975 - 1978
7.0
700
1979 - 1980
6.0
600
1981 - 1983
3.0
300
1984 and later
1.2
220
c)
 
Exhaust emissions from heavy duty vehicles, which for the purposes of this
subsection means a vehicle with 8001 pounds or greater manufacturer's maximum
gross vehicle weight rating (GVWR), shall not exceed the following limitations:
Model Year
Carbon Monoxide
Hydrocarbons as
Hexane
%
(ppm)
1968 - 1971
9.5
1500
1972 - 1978
9.0
900
1979 - 1984
7.0
700
1985 and later
3.0
300
(Source: Repealed at 24 Ill. Reg. , effective )
Section 240.125 Compliance Determination (Repealed)
For purposes of determining compliance with Section 240.124 of this Part, all vehicles shall be
inspected while operating in the idle mode, and all 1981 and later model year light duty vehicles
and light duty trucks (as defined in Subsection 240.124(b) of this Part) shall be inspected at high
idle during a two-speed idle test.

 
13
(Source: Repealed at 24 Ill. Reg. , effective )
SUBPART E: TRANSIENT LOADED MODE TEST EMISSION STANDARDS
Section 240.162 Vehicle Exhaust Emission Start-Up Standards
Vehicle exhaust emission start-up standards contained in Section 240.Table A of this Part shall
apply for all vehicles subject to inspection until two years after the beginning of IM240
testingJanuary 31, 2001. From February 1, 2001, onward, these standards shall continue to apply
to all model year 1981 through model year 1987 LDV, LDT1, and LDT2 vehicles. All standards
are expressed in grams per mile (gpm).
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.163 Vehicle Exhaust Emission Final Standards
Beginning February 1, 2001, vehicleVehicle exhaust emission final standards contained in
Section 240.Table B of this Part shall apply for all vehicles subject to inspection beginning at the
conclusion of testing using the start up vehicle exhaust emissions standards required in Section
240.162 except for model year 1981 through model year 1987 LDV, LDT1, and LDT2 vehicles,
which shall continue to use the standards contained in Section 240.Table A of this Part as
described in Section 240.162. All standards are expressed in grams per mile (gpm).
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.164 Vehicle Exhaust Emission Fast-Pass Standards
Vehicle exhaust emissions fast-pass standards contained in Section 240.Table C of this Part will
apply for all vehicles subject to inspection under Section 240.161 of this Part utilizing the IM240
transient loaded mode exhaust emission test procedures that have been will be adopted by the
Agency in 35 Ill. Adm. Code 276. All standards are expressed as the cumulative grams for each
second of the composite and Phase 2 tests.
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.165 Compliance Determination
a) Vehicle Exhaust Emission Start-Up and Final Standards - Compliance shall be
determined based upon the measurement of exhaust emissions while operating the
vehicle on a dynamometer and following the driving cycle as specified for the
transient IM240 test procedures adopted by the Agency. If the corrected,
composite emission rates exceed standards for any pollutant, additional analysis of
test results shall review the second phase ("Phase 2") of the driving cycle
separately. Phase 2 shall include second 94 through second 239 of the driving

14
cycle. Second-by-second emission rates in grams and composite emission rates in
grams per mile for Phase 2 and for the entire composite test shall be recorded for
each pollutant. For any given pollutant, if the composite emission level is at or
below the composite standard or if the Phase 2 grams per mile emission level is at
or below the applicable Phase 2 standard, then the vehicle shall pass the test for
that pollutant. Composite and Phase 2 emission rates shall be calculated in
accordance with procedures specified in "High-Tech I/M Procedures, Emissions
Standards, Quality Control Requirements, and Equipment Specifications: IM240
and Functional Evaporative System Tests, Revised Technical Guidance",
incorporated by reference at Section 240.107(c) 240.107 of this Part.
b) Vehicle Exhaust Emission Fast-Pass Standards - Compliance will be determined
based upon the measurement of exhaust emissions while operating the vehicle on
a dynamometer and following the driving cycle as specified for the transient
IM240 test procedures adopted by the Agency. Vehicles will be fast-passed using
the following algorithm:
1) Beginning at second 30 of the driving cycle, cumulative second-by-second
emission levels for each second, calculated from the start of the cycle in
grams, will be compared to the cumulative fast-pass emission standards
for the second under consideration. Beginning at second 109, fast-pass
decisions are based upon analysis of cumulative emissions in Phase 2, the
portion of the test beginning at second 94, as well as emission levels
accumulated from the beginning of the composite test.
2) A vehicle will pass the transient IM240 test for a given pollutant if either
of the following conditions occurs:
A) cumulative emissions of the pollutant are below the full cycle fast-
pass standard for the second under consideration; or
B) at second 109 and later, cumulative Phase 2 emissions are below
the Phase 2 fast-pass standards for the second under consideration.
3) Testing may be terminated when fast-pass criteria are met for all subject
pollutants in the same second.
4) If a fast-pass determination cannot be made for all subject pollutants
before the driving cycle ends, the pass/fail determination for each
component will be based on composite or Phase 2 emissions over the full
driving cycle according to the procedures in subsection (a) of this Section.
In cases where fast-pass standards are not used, composite emission rates
in grams per mile for Phase 2 and for the entire composite test will be
recorded for each pollutant.

 
15
5) Composite and Phase 2 emission rates will be calculated in accordance
with procedures specified in “High-Tech I/M Procedures, Emissions
Standards, Quality Control Requirements, and Equipment Specifications:
IM240 and Functional Evaporative System Tests, Revised Technical
Guidance” incorporated by reference at Section 240.107(c) 240.107 of this
Part.
(Source: Amended at 24 Ill. Reg. , effective )
SUBPART H: ON-BOARD DIAGNOSTIC TEST STANDARDS
Section 240.191 Applicability
The standards of this Subpart apply to all 1996 and newer model year light duty vehicles, light
duty trucks 1, and light duty trucks 2 that are required to meet the standards contained in 40
C.F.R.CFR § 86.094-17 and which are inspected utilizing the on-board diagnostic test procedures
contained that will be adopted by the Agency in 35 Ill. Adm. Code 276. Vehicles that receive a
result of fail do not thereby fail their emissions test until January 1, 2002 2001.
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.TABLE A Vehicle Exhaust Emission Start-Up Standards
Light Duty Vehicles:
Model Years Hydrocarbons Carbon Monoxide Oxides of Nitrogen
Composite Phase 2 Composite Phase 2 Composite Phase 2
(gpm) (gpm) (gpm) (gpm) (gpm) (gpm)
1996+ 0.80 0.50 15.0 12.0 2.0 Reserved
1991-1995 1.20 0.75 20.0 16.0 2.5 Reserved
1983-1990 2.00 1.25 30.0 24.0 3.0 Reserved
1981-1982 2.00 1.25 60.0 48.0 3.0 Reserved
Light Duty Trucks 1:
Model Years Hydrocarbons Carbon Monoxide Oxides of Nitrogen
Composite Phase 2 Composite Phase 2 Composite Phase 2
(gpm) (gpm) (gpm) (gpm) (gpm) (gpm)

16
1996+
(< 3750
LVW)
0.80 0.50 15.0 12.0 2.0 Reserved
(> 3750
LVW)
1.00 0.63 20.0 16.0 2.5 Reserved
1991-1995 2.40 1.50 60.0 48.0 3.0 Reserved
1988-1990 3.20 2.00 80.0 64.0 3.5 Reserved
1984-1987 3.20 2.00 80.0 64.0 7.0 Reserved
1981-1983 7.50 5.00 100.0 80.0 7.0 Reserved
Light Duty Trucks 2:
Model Years Hydrocarbons Carbon Monoxide Oxides of Nitrogen
Composite Phase 2 Composite Phase 2 Composite Phase 2
(gpm) (gpm) (gpm) (gpm) (gpm) (gpm)
1996+
(< 5750
ALVW)
1.00 0.63 20.0 16.0 2.5 Reserved
(> 5750
ALVW)
2.40 1.50 60.0 48.0 4.0 Reserved
1991-1995 2.40 1.50 60.0 48.0 4.5 Reserved
1988-1990 3.20 2.00 80.0 64.0 5.0 Reserved
1984-1987 3.20 2.00 80.0 64.0 7.0 Reserved
1981-1983 7.50 5.00 100.0 80.0 7.0 Reserved
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.TABLE B Vehicle Exhaust Emission Final Standards
Light Duty Vehicles:
Model Years Hydrocarbons Carbon Monoxide Oxides of Nitrogen
Composite Phase 2 Composite Phase 2 Composite Phase 2
(gpm) (gpm) (gpm) (gpm) (gpm) (gpm)
1996+ 0.60 0.40 10.0 8.0 1.5 Reserved
1983-1995 0.80 0.50 15.0 12.0 2.0 Reserved
1981-1982 0.80 0.50 30.0 24.0 2.0 Reserved
Light Duty Trucks 1:

17
Model Years Hydrocarbons Carbon Monoxide Oxides of Nitrogen
Composite Phase 2 Composite Phase 2 Composite Phase 2
(gpm) (gpm) (gpm) (gpm) (gpm) (gpm)
1996+
(< 3750
LVW)
0.60 0.40 10.0 8.0 1.5 Reserved
(> 3750
LVW)
0.80 0.50 13.0 10.0 1.8 Reserved
1988-1995 1.60 1.00 40.0 32.0 2.5 Reserved
1984-1987 1.60 1.00 40.0 32.0 4.5 Reserved
1981-1983 3.40 2.00 70.0 56.0 4.5 Reserved
Light Duty Trucks 2:
Model Years Hydrocarbons Carbon Monoxide Oxides of Nitrogen
Composite Phase 2 Composite Phase 2 Composite Phase 2
(gpm) (gpm) (gpm) (gpm) (gpm) (gpm)
1996+
(< 5750
ALVW)
0.80 0.50 13.0 10.0 1.8 Reserved
(> 5750
ALVW)
0.80 0.50 15.0 12.0 2.0 Reserved
1988-1995 1.60 1.00 40.0 32.0 3.5 Reserved
1984-1987 1.60 1.00 40.0 32.0 4.5 Reserved
1981-1983 3.40 2.00 70.0 56.0 4.5 Reserved
(Source: Amended at 24 Ill. Reg. , effective )
Section 240.TABLE C Vehicle Exhaust Emission Fast-Pass Standards
a)
 
Vehicles having composite hydrocarbon emission limitations of less than 1.25 grams per
mile, in Section 240.Table A or Section 240.Table B, shall use the hydrocarbon fast-pass
standards contained in this subsection. Vehicles having and composite carbon monoxide
emission limitations of less than 20.0 grams per mile, in Section 240.Table A or Section
240.Table B, shall use the carbon monoxide fast-pass standards contained in this
subsection:
Hydrocarbons Carbon Monoxide
Second Composite Phase 2 Composite Phase 2
30 0.124 N/A 0.693 N/A

18
31 0.126 N/A 0.773 N/A
32 0.129 N/A 0.837 N/A
33 0.135 N/A 0.851 N/A
34 0.140 N/A 0.853 N/A
35 0.146 N/A 0.857 N/A
36 0.150 N/A 0.900 N/A
37 0.153 N/A 0.960 N/A
38 0.156 N/A 1.034 N/A
39 0.160 N/A 1.070 N/A
40 0.165 N/A 1.076 N/A
41 0.169 N/A 1.083 N/A
42 0.172 N/A 1.102 N/A
43 0.173 N/A 1.111 N/A
44 0.177 N/A 1.114 N/A
45 0.197 N/A 1.157 N/A
46 0.200 N/A 1.344 N/A
47 0.208 N/A 1.482 N/A
48 0.221 N/A 1.530 N/A
49 0.232 N/A 1.542 N/A
50 0.235 N/A 1.553 N/A
51 0.238 N/A 1.571 N/A
52 0.240 N/A 1.595 N/A
53 0.242 N/A 1.633 N/A
54 0.246 N/A 1.685 N/A
55 0.249 N/A 1.689 N/A
56 0.252 N/A 1.693 N/A
57 0.261 N/A 1.700 N/A
58 0.271 N/A 1.723 N/A
59 0.276 N/A 1.852 N/A
60 0.278 N/A 1.872 N/A
61 0.280 N/A 1.872 N/A
62 0.282 N/A 1.872 N/A
63 0.283 N/A 1.900 N/A
64 0.284 N/A 1.917 N/A
65 0.285 N/A 1.944 N/A
66 0.286 N/A 2.000 N/A
67 0.288 N/A 2.060 N/A
68 0.291 N/A 2.064 N/A
69 0.294 N/A 2.076 N/A
70 0.296 N/A 2.104 N/A
71 0.298 N/A 2.117 N/A
72 0.300 N/A 2.125 N/A
73 0.302 N/A 2.130 N/A
74 0.304 N/A 2.138 N/A
75 0.307 N/A 2.152 N/A

19
76 0.308 N/A 2.170 N/A
77 0.308 N/A 2.188 N/A
78 0.308 N/A 2.200 N/A
79 0.314 N/A 2.212 N/A
80 0.320 N/A 2.212 N/A
81 0.324 N/A 2.221 N/A
82 0.327 N/A 2.222 N/A
83 0.329 N/A 2.227 N/A
84 0.333 N/A 2.236 N/A
85 0.336 N/A 2.243 N/A
86 0.339 N/A 2.262 N/A
87 0.343 N/A 2.271 N/A
88 0.347 N/A 2.284 N/A
89 0.350 N/A 2.299 N/A
90 0.356 N/A 2.308 N/A
91 0.358 N/A 2.326 N/A
92 0.360 N/A 2.330 N/A
93 0.363 N/A 2.331 N/A
94 0.367 N/A 2.344 N/A
95 0.370 N/A 2.347 N/A
96 0.372 N/A 2.355 N/A
97 0.376 N/A 2.395 N/A
98 0.388 N/A 2.451 N/A
99 0.396 N/A 2.508 N/A
100 0.405 N/A 2.590 N/A
101 0.410 N/A 2.660 N/A
102 0.411 N/A 2.749 N/A
103 0.412 N/A 2.913 N/A
104 0.413 N/A 3.162 N/A
105 0.421 N/A 3.170 N/A
106 0.428 N/A 3.197 N/A
107 0.430 N/A 3.288 N/A
108 0.455 N/A 3.419 N/A
109 0.459 0.015 3.587 0.168
110 0.462 0.017 3.595 0.173
111 0.464 0.021 3.640 0.237
112 0.466 0.024 3.740 0.266
113 0.468 0.024 3.868 0.280
114 0.471 0.025 3.877 0.291
115 0.488 0.026 3.934 0.314
116 0.513 0.029 4.015 0.331
117 0.538 0.032 4.061 0.345
118 0.561 0.035 4.063 0.350
119 0.577 0.035 4.079 0.356
120 0.580 0.036 4.140 0.367

20
121 0.586 0.038 4.185 0.388
122 0.594 0.040 4.199 0.407
123 0.603 0.041 4.205 0.463
124 0.610 0.042 4.212 0.480
125 0.615 0.042 4.232 0.506
126 0.624 0.042 4.298 0.518
127 0.628 0.045 4.344 0.522
128 0.632 0.046 4.361 0.525
129 0.637 0.046 4.366 0.528
130 0.641 0.049 4.369 0.530
131 0.643 0.050 4.372 0.530
132 0.644 0.052 4.435 0.534
133 0.645 0.054 4.523 0.550
134 0.647 0.054 4.524 0.554
135 0.651 0.054 4.525 0.590
136 0.658 0.055 4.531 0.616
137 0.663 0.055 4.534 0.639
138 0.666 0.056 4.542 0.653
139 0.668 0.059 4.553 0.662
140 0.670 0.061 4.554 0.683
141 0.672 0.061 4.554 0.696
142 0.675 0.061 4.554 0.708
143 0.678 0.063 4.554 0.721
144 0.681 0.064 4.554 0.739
145 0.684 0.065 4.554 0.742
146 0.686 0.066 4.554 0.743
147 0.688 0.067 4.554 0.745
148 0.690 0.068 4.554 0.748
149 0.692 0.069 4.554 0.751
150 0.694 0.070 4.554 0.762
151 0.696 0.071 4.556 0.789
152 0.698 0.072 4.556 0.790
153 0.700 0.073 4.565 0.794
154 0.702 0.073 4.612 0.799
155 0.704 0.074 4.834 0.805
156 0.706 0.077 5.702 0.842
157 0.708 0.079 5.841 0.990
158 0.710 0.082 6.170 1.038
159 0.712 0.082 6.670 1.357
160 0.716 0.086 7.425 1.455
161 0.750 0.095 8.379 1.546
162 0.784 0.107 9.648 1.824
163 0.805 0.115 10.918 2.746
164 0.840 0.122 12.157 3.073
165 0.853 0.127 12.731 3.633

21
166 0.874 0.159 12.831 4.505
167 0.903 0.186 12.892 4.952
168 0.910 0.189 12.932 5.254
169 0.914 0.200 13.702 5.730
170 0.916 0.220 14.139 6.051
171 0.919 0.236 14.964 6.333
172 0.931 0.247 15.704 6.490
173 0.948 0.257 16.253 6.796
174 0.983 0.267 16.907 7.205
175 1.018 0.283 17.655 8.151
176 1.027 0.295 18.020 8.230
177 1.035 0.312 18.349 8.584
178 1.051 0.318 18.671 8.800
179 1.074 0.323 18.972 8.847
180 1.084 0.337 19.228 8.913
181 1.099 0.345 20.123 9.122
182 1.121 0.350 20.405 9.532
183 1.132 0.359 20.754 10.256
184 1.152 0.387 21.684 10.862
185 1.161 0.398 21.955 10.996
186 1.168 0.400 22.650 11.206
187 1.175 0.402 22.989 11.514
188 1.181 0.405 23.535 11.894
189 1.188 0.418 23.876 12.019
190 1.203 0.429 24.018 12.170
191 1.219 0.442 24.464 12.517
192 1.233 0.457 24.685 12.598
193 1.251 0.473 24.931 12.625
194 1.255 0.487 25.188 12.653
195 1.258 0.501 25.468 12.777
196 1.265 0.510 25.627 12.906
197 1.280 0.512 25.746 12.989
198 1.293 0.514 25.850 13.060
199 1.301 0.516 25.974 13.165
200 1.313 0.518 26.141 13.242
201 1.324 0.527 26.225 13.412
202 1.332 0.540 26.338 13.662
203 1.341 0.547 26.547 13.773
204 1.357 0.553 26.818 13.942
205 1.375 0.559 27.052 14.090
206 1.392 0.563 27.393 14.224
207 1.408 0.567 27.501 14.426
208 1.422 0.571 27.632 14.498
209 1.433 0.575 27.803 14.776
210 1.443 0.579 27.953 14.907

22
211 1.453 0.595 28.205 14.916
212 1.463 0.605 28.543 15.014
213 1.468 0.614 28.997 15.221
214 1.470 0.622 29.000 15.472
215 1.474 0.627 29.005 15.555
216 1.478 0.638 29.081 15.652
217 1.481 0.643 29.281 15.969
218 1.484 0.643 29.483 16.028
219 1.487 0.645 29.734 16.375
220 1.490 0.651 29.803 16.487
221 1.493 0.655 29.821 16.524
222 1.504 0.663 29.847 16.578
223 1.522 0.671 29.862 16.684
224 1.547 0.675 29.873 16.755
225 1.549 0.684 30.008 16.770
226 1.562 0.694 30.126 16.805
227 1.574 0.701 30.127 16.865
228 1.579 0.702 30.127 16.960
229 1.584 0.708 30.208 16.960
230 1.589 0.708 30.314 16.962
231 1.590 0.709 30.323 16.988
232 1.596 0.710 30.325 17.072
233 1.598 0.710 30.368 17.094
234 1.604 0.711 30.411 17.184
235 1.610 0.712 30.416 17.187
236 1.612 0.712 30.428 17.188
237 1.613 0.712 30.430 17.189
238 1.614 0.713 30.452 17.241
239 1.615 0.716 30.488 17.370
b) Vehicles having composite hydrocarbon emission limitations of at least 1.25 grams per
mile but less than 2.00 grams per mile, in Section 240.Table A or Section 240.Table B,
shall use the hydrocarbon fast-pass standards contained in this subsection. Vehicles
having and composite carbon monoxide emission limitations of at least 20.0 grams per
mile but less than 30.0 grams per mile, in Section 240.Table A or Section 240.Table B,
shall use the carbon monoxide fast-pass standards contained in this subsection;
Hydrocarbons Carbon Monoxide
Second Composite Phase 2 Composite Phase 2
30 0.247 N/A 1.502 N/A
31 0.253 N/A 1.546 N/A
32 0.258 N/A 1.568 N/A
33 0.263 N/A 1.582 N/A
34 0.268 N/A 1.593 N/A
35 0.277 N/A 1.602 N/A

23
36 0.283 N/A 1.621 N/A
37 0.293 N/A 1.631 N/A
38 0.297 N/A 1.702 N/A
39 0.298 N/A 1.784 N/A
40 0.313 N/A 1.879 N/A
41 0.320 N/A 2.162 N/A
42 0.327 N/A 2.307 N/A
43 0.342 N/A 2.343 N/A
44 0.360 N/A 2.376 N/A
45 0.376 N/A 2.406 N/A
46 0.389 N/A 2.433 N/A
47 0.408 N/A 2.458 N/A
48 0.423 N/A 2.483 N/A
49 0.434 N/A 2.774 N/A
50 0.444 N/A 2.844 N/A
51 0.454 N/A 2.900 N/A
52 0.465 N/A 2.936 N/A
53 0.472 N/A 3.133 N/A
54 0.478 N/A 3.304 N/A
55 0.485 N/A 3.407 N/A
56 0.493 N/A 3.456 N/A
57 0.500 N/A 3.480 N/A
58 0.505 N/A 3.518 N/A
59 0.514 N/A 3.560 N/A
60 0.537 N/A 3.593 N/A
61 0.540 N/A 3.628 N/A
62 0.543 N/A 3.641 N/A
63 0.546 N/A 3.655 N/A
64 0.551 N/A 3.680 N/A
65 0.559 N/A 3.700 N/A
66 0.567 N/A 3.728 N/A
67 0.575 N/A 3.857 N/A
68 0.588 N/A 3.894 N/A
69 0.595 N/A 3.943 N/A
70 0.601 N/A 3.983 N/A
71 0.606 N/A 4.009 N/A
72 0.610 N/A 4.023 N/A
73 0.617 N/A 4.023 N/A
74 0.631 N/A 4.053 N/A
75 0.643 N/A 4.063 N/A
76 0.651 N/A 4.077 N/A
77 0.659 N/A 4.225 N/A
78 0.667 N/A 4.243 N/A
79 0.676 N/A 4.260 N/A
80 0.681 N/A 4.282 N/A

24
81 0.685 N/A 4.322 N/A
82 0.689 N/A 4.398 N/A
83 0.694 N/A 4.482 N/A
84 0.700 N/A 4.515 N/A
85 0.705 N/A 4.518 N/A
86 0.709 N/A 4.520 N/A
87 0.713 N/A 4.522 N/A
88 0.717 N/A 4.522 N/A
89 0.721 N/A 4.523 N/A
90 0.724 N/A 4.526 N/A
91 0.727 N/A 4.527 N/A
92 0.729 N/A 4.527 N/A
93 0.731 N/A 4.528 N/A
94 0.734 N/A 4.528 N/A
95 0.740 N/A 4.528 N/A
96 0.748 N/A 4.529 N/A
97 0.759 N/A 4.575 N/A
98 0.771 N/A 4.703 N/A
99 0.783 N/A 4.805 N/A
100 0.793 N/A 4.886 N/A
101 0.810 N/A 4.957 N/A
102 0.823 N/A 5.104 N/A
103 0.836 N/A 5.340 N/A
104 0.853 N/A 5.496 N/A
105 0.871 N/A 5.625 N/A
106 0.887 N/A 5.815 N/A
107 0.899 N/A 6.473 N/A
108 0.931 N/A 7.037 N/A
109 0.947 0.040 7.419 0.246
110 0.957 0.047 7.643 0.257
111 0.965 0.052 7.759 0.286
112 0.971 0.056 7.824 0.379
113 0.977 0.061 7.889 0.425
114 0.983 0.064 7.960 0.457
115 1.003 0.072 8.024 0.477
116 1.030 0.081 8.076 0.494
117 1.041 0.082 8.111 0.504
118 1.050 0.083 8.130 0.512
119 1.052 0.092 8.148 0.519
120 1.055 0.094 8.211 0.529
121 1.061 0.097 8.478 0.529
122 1.071 0.100 8.548 0.530
123 1.081 0.103 8.561 0.531
124 1.091 0.106 8.568 0.532
125 1.102 0.108 8.572 0.533

25
126 1.110 0.110 8.584 0.548
127 1.116 0.112 8.592 0.610
128 1.121 0.114 8.596 0.614
129 1.125 0.116 8.597 0.622
130 1.128 0.118 8.601 0.631
131 1.130 0.120 8.605 0.640
132 1.132 0.122 8.608 0.646
133 1.134 0.123 8.626 0.650
134 1.135 0.124 8.650 0.652
135 1.143 0.127 8.660 0.738
136 1.147 0.130 8.767 0.754
137 1.156 0.134 9.029 0.780
138 1.163 0.139 9.238 0.795
139 1.186 0.146 9.389 0.804
140 1.253 0.149 9.493 0.810
141 1.262 0.151 9.583 0.815
142 1.271 0.153 9.626 0.818
143 1.277 0.155 9.669 0.821
144 1.283 0.157 9.716 0.825
145 1.291 0.162 9.763 0.840
146 1.294 0.164 9.809 0.847
147 1.296 0.166 9.852 0.855
148 1.298 0.168 9.885 0.865
149 1.303 0.169 9.932 0.874
150 1.316 0.170 9.986 0.891
151 1.330 0.171 10.039 0.914
152 1.342 0.172 10.072 0.929
153 1.348 0.173 10.090 0.937
154 1.353 0.175 10.105 0.942
155 1.362 0.178 10.146 0.949
156 1.365 0.180 10.245 1.375
157 1.366 0.189 10.397 1.576
158 1.373 0.198 10.923 1.943
159 1.397 0.203 11.970 2.820
160 1.422 0.207 13.421 3.281
161 1.440 0.214 15.289 3.483
162 1.452 0.221 15.912 3.620
163 1.465 0.229 16.530 4.168
164 1.509 0.247 17.622 4.338
165 1.533 0.274 18.366 4.682
166 1.555 0.309 19.869 5.633
167 1.576 0.318 20.711 6.137
168 1.598 0.322 22.319 6.853
169 1.618 0.333 23.751 7.136
170 1.636 0.343 24.842 7.320

26
171 1.666 0.356 25.410 7.685
172 1.685 0.385 25.798 8.052
173 1.726 0.409 26.122 8.344
174 1.742 0.433 26.353 8.602
175 1.756 0.453 26.638 8.898
176 1.769 0.463 27.219 9.251
177 1.784 0.507 27.279 10.253
178 1.802 0.523 27.320 10.828
179 1.822 0.528 27.352 10.933
180 1.843 0.541 27.822 11.060
181 1.864 0.549 28.763 11.188
182 1.884 0.559 29.402 11.345
183 1.896 0.571 29.971 11.733
184 1.915 0.584 30.276 12.598
185 1.940 0.598 30.988 12.953
186 1.958 0.613 31.095 13.213
187 1.972 0.624 31.314 14.131
188 1.985 0.629 31.833 14.839
189 1.991 0.629 32.239 15.137
190 1.993 0.638 32.547 15.138
191 1.995 0.648 32.855 15.141
192 2.001 0.659 33.153 15.595
193 2.015 0.663 33.444 15.658
194 2.031 0.671 33.482 15.704
195 2.047 0.681 33.516 15.729
196 2.063 0.693 33.549 16.058
197 2.079 0.709 33.653 16.987
198 2.094 0.725 33.973 17.064
199 2.109 0.740 34.159 17.073
200 2.122 0.754 34.191 17.153
201 2.130 0.767 34.250 17.332
202 2.137 0.775 34.469 17.406
203 2.157 0.787 34.716 17.641
204 2.172 0.795 34.969 17.922
205 2.194 0.803 35.144 18.484
206 2.222 0.854 35.418 18.553
207 2.245 0.859 35.766 18.658
208 2.268 0.872 35.949 18.953
209 2.279 0.892 36.010 19.266
210 2.288 0.896 36.548 19.309
211 2.301 0.903 37.179 19.731
212 2.316 0.924 37.651 19.902
213 2.332 0.938 38.041 20.012
214 2.345 0.941 38.591 20.260
215 2.354 0.951 38.852 20.739

27
216 2.362 0.966 38.861 21.346
217 2.368 0.979 38.926 21.810
218 2.376 0.980 39.194 22.001
219 2.384 0.981 39.474 22.290
220 2.391 1.005 39.668 22.324
221 2.395 1.016 39.781 22.343
222 2.400 1.022 39.890 22.522
223 2.405 1.028 39.954 22.661
224 2.409 1.035 39.984 22.666
225 2.413 1.041 39.989 22.667
226 2.415 1.045 39.990 22.668
227 2.417 1.051 39.990 22.669
228 2.419 1.055 39.990 22.670
229 2.420 1.059 39.991 22.671
230 2.421 1.062 40.012 22.671
231 2.423 1.063 40.061 22.672
232 2.425 1.063 40.116 22.673
233 2.427 1.063 40.249 22.673
234 2.429 1.064 40.253 22.673
235 2.430 1.064 40.290 22.674
236 2.431 1.066 40.385 22.675
237 2.432 1.069 40.488 22.675
238 2.433 1.072 40.720 22.675
239 2.434 1.075 40.763 22.677
c) Vehicles having composite hydrocarbon emission limitations of 2.00 grams per mile or
greater, in Section 240.Table A or Section 240.Table B, shall use the hydrocarbon fast-
pass standards contained in this subsection. Vehicles having and composite carbon
monoxide emission limitations of 30.0 grams per mile or greater, in Section 240.Table A
or Section 240.Table B, shall use the carbon monoxide fast-pass standards contained in
this subsection:
Hydrocarbons Carbon Monoxide
Second Composite Phase 2 Composite Phase 2
30 0.407 N/A 3.804 N/A
31 0.415 N/A 3.985 N/A
32 0.423 N/A 4.215 N/A
33 0.436 N/A 4.440 N/A
34 0.451 N/A 4.579 N/A
35 0.464 N/A 4.688 N/A
36 0.468 N/A 4.749 N/A
37 0.475 N/A 4.783 N/A
38 0.487 N/A 4.813 N/A
39 0.506 N/A 4.876 N/A
40 0.530 N/A 5.104 N/A

28
41 0.549 N/A 5.217 N/A
42 0.569 N/A 5.383 N/A
43 0.588 N/A 5.571 N/A
44 0.609 N/A 5.888 N/A
45 0.621 N/A 6.199 N/A
46 0.636 N/A 6.245 N/A
47 0.649 N/A 6.318 N/A
48 0.666 N/A 6.418 N/A
49 0.679 N/A 6.540 N/A
50 0.696 N/A 6.690 N/A
51 0.712 N/A 6.875 N/A
52 0.727 N/A 7.029 N/A
53 0.745 N/A 7.129 N/A
54 0.760 N/A 7.359 N/A
55 0.776 N/A 7.722 N/A
56 0.797 N/A 8.017 N/A
57 0.814 N/A 8.249 N/A
58 0.826 N/A 8.425 N/A
59 0.837 N/A 8.563 N/A
60 0.849 N/A 8.686 N/A
61 0.862 N/A 8.804 N/A
62 0.872 N/A 8.916 N/A
63 0.887 N/A 9.025 N/A
64 0.895 N/A 9.138 N/A
65 0.903 N/A 9.250 N/A
66 0.925 N/A 9.354 N/A
67 0.933 N/A 9.457 N/A
68 0.945 N/A 9.575 N/A
69 0.959 N/A 9.728 N/A
70 0.970 N/A 9.938 N/A
71 0.980 N/A 10.140 N/A
72 0.988 N/A 10.222 N/A
73 0.997 N/A 10.261 N/A
74 1.022 N/A 10.278 N/A
75 1.037 N/A 10.290 N/A
76 1.051 N/A 10.715 N/A
77 1.064 N/A 10.790 N/A
78 1.075 N/A 10.844 N/A
79 1.087 N/A 10.921 N/A
80 1.097 N/A 11.010 N/A
81 1.105 N/A 11.090 N/A
82 1.114 N/A 11.136 N/A
83 1.136 N/A 11.136 N/A
84 1.160 N/A 11.165 N/A
85 1.182 N/A 11.191 N/A

29
86 1.201 N/A 11.205 N/A
87 1.217 N/A 11.211 N/A
88 1.233 N/A 11.211 N/A
89 1.248 N/A 11.211 N/A
90 1.262 N/A 11.211 N/A
91 1.271 N/A 11.220 N/A
92 1.279 N/A 11.294 N/A
93 1.287 N/A 11.332 N/A
94 1.295 N/A 11.355 N/A
95 1.302 N/A 11.383 N/A
96 1.309 N/A 11.410 N/A
97 1.316 N/A 11.433 N/A
98 1.325 N/A 11.516 N/A
99 1.339 N/A 11.820 N/A
100 1.356 N/A 12.104 N/A
101 1.365 N/A 12.344 N/A
102 1.378 N/A 12.781 N/A
103 1.397 N/A 13.472 N/A
104 1.420 N/A 14.405 N/A
105 1.445 N/A 14.808 N/A
106 1.470 N/A 14.965 N/A
107 1.491 N/A 15.121 N/A
108 1.506 N/A 15.372 N/A
109 1.517 0.151 15.530 1.113
110 1.528 0.159 15.687 1.213
111 1.542 0.172 16.018 1.344
112 1.559 0.186 16.527 1.399
113 1.578 0.199 16.810 1.520
114 1.594 0.207 16.961 1.640
115 1.605 0.216 17.120 1.684
116 1.615 0.229 17.135 1.693
117 1.625 0.235 17.249 1.786
118 1.642 0.240 17.451 2.007
119 1.670 0.245 17.509 2.084
120 1.694 0.261 17.605 2.179
121 1.705 0.267 17.734 2.264
122 1.717 0.277 18.049 2.328
123 1.732 0.287 18.447 2.375
124 1.747 0.298 18.592 2.437
125 1.763 0.308 18.657 2.543
126 1.779 0.316 18.796 2.593
127 1.795 0.322 18.952 2.641
128 1.810 0.329 19.137 2.663
129 1.823 0.338 19.329 2.672
130 1.835 0.346 19.519 2.676

30
131 1.845 0.354 19.707 2.683
132 1.854 0.356 19.882 2.817
133 1.862 0.357 19.905 2.992
134 1.870 0.359 20.049 3.111
135 1.883 0.362 20.460 3.234
136 1.888 0.364 20.746 3.304
137 1.896 0.368 21.068 3.310
138 1.911 0.378 21.380 3.320
139 1.928 0.391 21.748 3.354
140 1.949 0.402 22.046 3.436
141 1.969 0.408 22.348 3.443
142 1.982 0.422 22.397 3.452
143 1.999 0.428 22.407 3.490
144 2.011 0.432 22.417 3.552
145 2.022 0.434 22.922 3.588
146 2.035 0.439 22.951 3.600
147 2.043 0.450 22.976 3.616
148 2.049 0.460 23.017 3.627
149 2.063 0.467 23.073 3.636
150 2.085 0.472 23.161 3.676
151 2.104 0.480 23.218 3.882
152 2.117 0.491 23.253 4.011
153 2.127 0.503 23.337 4.047
154 2.138 0.505 23.425 4.067
155 2.152 0.515 23.534 4.081
156 2.168 0.522 23.652 4.116
157 2.186 0.527 23.739 4.251
158 2.205 0.537 24.606 5.099
159 2.224 0.549 25.615 5.383
160 2.242 0.568 26.073 6.362
161 2.268 0.586 28.496 7.926
162 2.308 0.610 29.772 8.429
163 2.352 0.648 31.056 9.201
164 2.406 0.677 33.351 10.825
165 2.421 0.699 34.890 12.291
166 2.435 0.720 35.937 13.366
167 2.470 0.738 37.012 14.428
168 2.501 0.767 37.892 15.318
169 2.537 0.828 39.028 15.699
170 2.571 0.855 40.406 16.073
171 2.625 0.869 41.379 16.475
172 2.657 0.885 42.033 17.158
173 2.683 0.900 42.432 17.532
174 2.701 0.941 42.742 17.965
175 2.717 0.979 43.399 18.242

31
176 2.732 1.002 43.895 18.283
177 2.756 1.025 44.227 18.480
178 2.781 1.047 44.926 19.576
179 2.811 1.065 45.256 20.015
180 2.853 1.089 45.553 20.203
181 2.898 1.109 45.753 20.433
182 2.946 1.133 46.210 21.025
183 2.988 1.158 47.017 21.882
184 3.023 1.184 48.185 22.204
185 3.057 1.209 48.741 22.859
186 3.076 1.222 49.462 23.533
187 3.101 1.231 50.313 24.281
188 3.120 1.239 51.285 25.078
189 3.136 1.254 52.076 25.276
190 3.151 1.278 52.857 25.578
191 3.163 1.300 52.876 25.859
192 3.209 1.313 53.067 25.985
193 3.223 1.324 53.777 26.153
194 3.237 1.340 54.242 26.582
195 3.263 1.367 54.489 27.067
196 3.302 1.387 54.601 27.456
197 3.338 1.402 54.912 27.805
198 3.372 1.417 55.588 28.070
199 3.390 1.432 56.266 28.590
200 3.428 1.446 56.617 28.914
201 3.470 1.460 56.863 29.063
202 3.493 1.477 57.204 29.502
203 3.509 1.492 57.371 29.697
204 3.522 1.501 57.487 29.713
205 3.533 1.510 57.728 29.783
206 3.550 1.522 58.097 29.942
207 3.578 1.561 58.572 30.284
208 3.607 1.585 59.024 30.755
209 3.630 1.597 59.321 31.287
210 3.658 1.607 59.715 31.549
211 3.701 1.627 60.045 31.820
212 3.745 1.645 60.453 32.250
213 3.778 1.656 60.935 32.546
214 3.814 1.663 61.307 32.808
215 3.825 1.669 61.666 33.060
216 3.835 1.674 62.148 33.204
217 3.844 1.685 62.532 33.341
218 3.853 1.700 62.546 33.414
219 3.864 1.704 62.559 33.514
220 3.874 1.706 62.570 33.640

32
221 3.891 1.709 62.846 33.692
222 3.928 1.711 63.097 33.711
223 3.966 1.714 63.150 33.733
224 4.008 1.718 63.150 33.770
225 4.010 1.721 63.150 33.796
226 4.012 1.723 63.150 33.810
227 4.016 1.726 63.150 33.821
228 4.019 1.729 63.150 33.839
229 4.057 1.731 63.150 33.865
230 4.065 1.733 63.150 33.894
231 4.071 1.735 63.150 33.918
232 4.073 1.743 63.150 33.944
233 4.075 1.749 63.150 33.985
234 4.077 1.753 63.153 34.014
235 4.079 1.757 63.159 34.032
236 4.081 1.762 63.173 34.051
237 4.083 1.767 63.193 34.067
238 4.084 1.772 63.214 34.079
239 4.085 1.776 63.233 34.085
(Source: Amended at 24 Ill. Reg. , effective )
IT IS SO ORDERED.
I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, hereby certify that the
above opinion and order was adopted on the 7th day of December 2000 by a vote of 7-0.
Dorothy M. Gunn, Clerk
Illinois Pollution Control Board

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