ILLINOIS POLLUTION CONTROL BOARD
    October 20,
    1994
    IN THE MATTER OF:
    )
    ENHANCED VEHICLE INSPECTION
    AND
    )
    R94-19
    MAINTENANCE
    (1/14) REGULATIONS
    )
    (Rulemaking)
    AMENDMENTS TO 35 ILL.
    ADM. CODE
    )
    240
    Proposed Rule. Second Notice.
    OPINION
    AND
    ORDER OF THE BOARD
    (by G. Tanner Girard):
    By this opinion and order the Board proposes regulations for
    Second Notice review by the Joint Committee on Administrative
    Rules
    (JCAR).
    These proposed amendments pertain to a vehicle
    inspection and maintenance program for the Chicago and
    metropolitan East St. Louis areas of the state.
    The purpose is
    to aid the Illinois Environmental Protection Agency (Agency)
    in
    assembling an acceptable State Implementation Plan
    (SIP)
    for
    ozone for these two areas of the state for submission to the U.S.
    Environmental Protection Agency (U.S.
    EPA).
    The Board’s responsibility in this matter arises from the
    Environmental Protection Act
    (Act)
    (415 ILCS 5/1 et seq.
    (1992)).
    The Board is charged therein to “determine,
    define and implement
    the environmental control standards applicable in the State of
    Illinois”
    (415 ILCS 5/5(b)).
    More generally, the Board’s
    rulemaking charge is based on the system of checks and balances
    integral to Illinois environmental governance: the Board bears
    responsibility for the rulemaking and principal adjudicatory
    functions; the Illinois Environmental Protection Agency
    (Agency)
    is responsible for carrying out the principal administrative
    duties.
    The latter’s duties include administering today’s
    proposed regulation.
    Procedural Summary
    On July 20,
    1994, the Illinois Environmental Protection
    Agency
    (Agency) filed this proposal for rulemaking pursuant to
    Section 28.5(e)
    of the Environmental Protection Act
    (Act)
    and
    Section 13B-20 of the Vehicle Emissions Inspection Law of 1995
    625
    ILCS 5/13B—20
    (see P.A. 88—533, effective January 18,
    1994).
    The Board accepted the proposal for hearing and proposed
    amendments for First Notice publication in the Illinois Register
    on July 21,
    1994 pursuant to Section 28.5(f), which required the
    Board to submit the proposed amendments for First Notice
    publication within 14 days.
    A Notice of Proposed Amendments
    appeared in the Register on August 5,
    1994,
    at 18
    Ill. Reg.
    12021.
    The Board conducted a public hearing on September 8,
    1994
    pursuant to Section 28.5(g) of the Act, which required the Board
    to conduct a hearing within 55 days.
    The transcript of that
    hearing was available on September 14,
    1994.
    The hearing officer

    2
    subsequently cancelled hearings previously scheduled for October
    7 and 21 at the request of the Agency, because we received no
    objection to the rule from the United States Environmental
    Protection Agency
    (U.S.
    EPA),
    and because no person submitted
    a
    request for hearing by September
    15,
    1994.
    Therefore the record
    closed in this matter on September 28,
    1994 pursuant to Section
    28.5(1)
    of the Act.
    Statutory and Regulatory Requirements
    The Board initially adopted a vehicle “inspection and
    maintenance”
    (I/N) program as part of
    35 Ill. Adm. Code 240 in
    R85—25 in 1986.
    Sections 182(b)
    and
    (C)
    of the federal Clean Air
    Act (CAA),
    as amended in 1990,
    require the use of I/M programs in
    areas not meeting the national ambient air quality standards
    (NAAQS)
    for ozone or carbon monoxide.
    The
    CAA
    specifies the use
    of “basic” I/M programs in “moderate” nonattainment areas and in
    “marginal” nonattainment areas with existing I/M programs.
    It
    requires the use of “enhanced” I/N programs in “serious”,
    “severe”, and “extreme” ozone nonattainnient areas with urbanized
    populations of 200,000 or more.
    In Illinois, the Chicago and
    Metro—East St.
    Louis
    (Metro—East)
    areas are classified as
    “severe” and “moderate” nonattainment for ozone,
    respectively.
    As such, they are subject to the federal I/N requirement.
    Illinois recently adopted the Vehicle Emissions Inspection
    Law of 1995
    (625 ILCS 5/l3B),
    P.A. 88—533, effective January 18,
    1994.
    That statute provides authority for the Agency to
    implement an enhanced I/M program and meet U.S. EPA’s
    requirements for such a program.
    P.A. 88—533 mandates enhanced
    1/14 testing for the Metro-East area and certain portions of the
    Chicago nonattainment area.
    P.A. 88—533, at new Section 13B-20, mandates that the Agency
    propose and the Board adopt enhanced I/M rules by the identical-
    in—substance rulemaking procedure.
    The Agency proposed codified
    U.S. EPA emissions standards concerning evaporative system
    pressure and purge testing for the enhanced 1/14 program in
    companion docket R94-20, proposed by the Board for public comment
    on July 21,
    1994,
    by identical—in-substance procedures under
    Section 28.4 of the Act.
    However, major portions of the federal
    enhanced I/N scheme are not codified in federal regulations, but
    exist only as federal guidance.
    Section 7.2 of the Act, which
    defines “identical—in—substance” rulemaking and establishes
    conditions for its use, allows the Board only to adopt federal
    rules using the identical—in—substance procedure.
    The Agency accordingly chose to use the next most expedient
    procedural mechanism, that of Section 28.5 “fast—track”
    rulemaking
    (415 ILCS 5/28.5),
    since this rulemaking also
    implements the requirements of the federal CAA.
    The Agency’s
    proposal represented the procedural means by which the Agency

    3
    sought to achieve the mobile source emissions standards necessary
    for the implementation of the enhanced I/M program.
    The
    standards proposed incorporate federal guidance.
    Review of Record
    Section 28.5(f) required the Board to publish the Agency’s
    proposal as received by the Agency, without substantive review.
    Section 28.5(m) prohibited the Board from revising the Agency’s
    proposal until after the close of the record unless the Agency
    agreed to the changes.
    That provision restricts the Board in the
    scope of any revisions during the course of this proceeding to
    those “based on the record”.
    The substantive record consists of the Agency’s proposal and
    accompanying documents; the transcript of the September 8
    hearing; four exhibits tendered by the Agency at hearing; the
    document entitled “Identical First Notice Line Numbered Version”,
    in which JCAR indicates its suggested corrections to the proposed
    rules; and five public comments.
    The exhibits tendered include
    an Agency errata sheet
    (Ex.
    1); the personal resume of Elizabeth
    R.
    Tracy, Program Manager, Division of Vehicle Inspection and
    Maintenance for the Agency
    (Ex.
    2); the personal resume of James
    R. Matheny,
    P.E., Manager, Technical Services Section, Division
    of Vehicle Inspection and Maintenance for the Agency
    (Ex.
    3); and
    the personal resume of Ronald L. Wohrle, Manager,
    Field Services
    Section, Division of Vehicle Inspection and Maintenance for the
    Agency
    (Ex.
    4).
    The public comments received were as follows:
    PC
    1 Illinois Department of Commerce and Community Affairs,
    by Linda D.
    Brand, Manager of Regulatory Flexibility
    Unit (to Vicki Thomas, Executive Director,
    JCAR),
    received August 11,
    1994
    PC
    2 Browning—Ferris Industries, by William R. Uffelman,
    Divisional Vice President, Government Affairs, Midwest
    Region, received August 31,
    1994
    PC
    3 Office of the Secretary of State,
    by Connie Bradway,
    Index Department, Administrative Code Division,
    received September 7,
    1994
    PC
    4 City of Chicago, by Maribeth Flowers, Assistant
    Corporation Counsel, received September 19,
    1994
    PC 5 Agency, by Christopher P. Demeroukas, Assistant
    Counsel, Division of Legal Counsel, received September
    30,
    1994
    By PC
    1, DCCA asserted that it defers to the findings of the
    Board with regard to the impact of the proposed rules on small
    businesses in Illinois.
    By PC 2, Browning—Ferris Industries

    4
    (BFI)
    voiced general support for the proposed rules, while
    suggesting a single change in the proposed regulatory language to
    enhance clarity.
    The Secretary of State,
    by PC 3, suggested two
    minor format revisions to the proposed text.
    By PC 4, the City
    of Chicago voiced general support for the proposed rules,
    highlighting the need for prompt adoption,
    in order to achieve
    the benefits of improved regional air quality and in order to
    avoid federal sanctions.
    The proposed changes suggested by PC 2
    and PC
    3 are discussed below.
    At the public hearing, the Agency described the background
    for its proposal, including the statutory and regulatory
    background behind the proposal.
    The Agency described that the
    CAA
    required Illinois to have submitted the statutory and
    regulatory authority for a new vehicle 1/14 program by November
    15,
    1993.
    The Agency stated that U.S. EPA notified Illinois on
    December 30,
    1993 that it would disapprove a proposed SIP
    revision, thus triggering the federal sanctions provisions of the
    CAA.
    Illinois is required to submit a complete SIP request
    involving a new vehicle 1/14 program within 18 months (i.e., by
    June 30,
    1995)
    or face federal sanctions.
    The possible sanctions
    reportedly include an imposed one—for—one emissions offset for
    new sources and the withdrawal of an estimated $710,000,000 in
    federal highway funds.
    The Agency described how the General
    Assembly adopted P.A.
    88-533 to confer the necessary statutory
    authority in January,
    1994, and how the present proposal flowed
    from that authority.
    (Tr.
    10-12.)
    According to the Agency,
    U.S. EPA developed a performance
    standard at 40 CFR 51, Subpart S for an I/N program.
    In that
    regulation, U.S. EPA sets forth the elements of an acceptable
    program and the expected emissions reductions a state must meet
    to have an acceptable program.
    The Agency asserted that most of
    the elements of the performance standard are not strictly
    required by U.S. EPA,
    so long as the emissions reductions
    achieved by the state meet the federal objectives.
    The Agency
    stated that U.S. EPA has embodied additional standards into
    guidance documents, upon which the Agency relied in assembling
    the proposed vehicle 1/14 program amendments.
    The Agency asserted
    that the Board’s adoption of the proposed amendments would allow
    the state to meet the federal objectives.
    (Tr.
    12-14.)
    The Agency presented the testimony of Elizabeth R. Tracy and
    James R. Matheny at hearing.
    Ms. Tracy is in charge of the
    operations of the Illinois vehicle emissions testing program.
    She stated that the program presently tests 2,400,000 vehicles
    each year at 19 stations in and around Chicago and three in the
    Metro—East area, with 90 test lanes.
    The tests are performed by
    a contractor whose contract expires after 1995.
    Since
    1986, the
    program has performed nearly 20,000,000 vehicle tests.
    The
    present test includes an emissions control systems tamper check
    and a high idle/low idle tailpipe emissions test.
    (Tr.
    20—21.)

    5
    Ms. Tracy asserted that an enhanced I/N program is mandated
    for the Chicago area by federal law.
    Illinois has decided to
    apply the enhanced program to the Metro-East area to aid in
    achieving the federally-required 15 percent reduction in volatile
    organic material
    (VOM)
    emissions for that area by 1996.’
    Ms.
    Tracy stated that the proposed enhanced vehicle I/N program would
    help identify gross polluting vehicles, thus increasing the
    efficiency and efficacy of a repair program and encouraging
    proper maintenance.
    It would also upgrade quality assurance.
    The proposed new test,
    called the “IN 240” for its 240 second
    test cycle, would test 1981 and newer vehicles under load on a
    dynamometer.
    The program would include tests of the fuel
    evaporative emissions control system,
    a check of the on—board
    vehicle emissions control diagnostic system,
    and on—road testing
    of emissions by remote sensors.
    She stated that adoption of the
    Agency proposal is
    “an integral and necessary step” towards
    compliance with the federal requirements.
    Ms. Tracy estimated
    that the number of vehicles included in the program will expand
    by about five percent in the Chicago area
    (by about 330,000
    vehicles)
    and by about 121 percent
    (by about 185,000 vehicles)
    in
    the Metro—East area as a result of the new Vehicle Emissions
    Inspection Law of 1995.
    (Tr. 22—25.)
    Ms. Tracy asserted that the Agency would attempt to build
    conveniences into the enhanced I/N program.
    These include a
    testing location within 12 miles of each motorist’s home and a
    maximum 20-minute waiting period for testing.
    Staggered,
    biennial testing will reduce the frequency of testing for most
    vehicles.
    (Tr. 24—25.)
    Ms. Tracy stated that the Agency will implement the enhanced
    testing program initially by adopting its own regulations for the
    operation of the program.
    Once the Board has adopted regulations
    based on the Agency proposal and the Agency has adopted the
    operational regulations, the Agency will submit a complete SIP
    revision proposal to U.S. EPA.
    (Tr.
    26; see Tr. 50—51
    & 58—63.)
    Mr. Matheny testified that the most significant changes
    involved in changing from the existing emissions testing program
    to the enhanced vehicle 1/14 program are the enlarged geographic
    area, the change to biennial testing for all vehicles, the use of
    improved testing procedures, changes in the waiver requirements,
    and other federally—required program features, such as procedures
    for dealing with emissions—related recalls, the testing of on—
    board diagnostic equipment,
    and the on-road testing.
    When fully
    implemented, the program will involve testing all 1981 and newer
    The Board notes that this is the goal for the Chicago and
    Metro-East areas of the four “15
    RAP
    plan” proceedings filed by
    the Agency to date:
    R94—12, R94—15, R94-16, and R94-21.

    6
    vehicles using the IN 240 procedure.
    The IN 240 procedure
    consists of a series of vehicle accelerations, decelerations, and
    high—speed cruises on a dynamometer to simulate on—road driving.
    Older passenger cars and light-duty trucks, heavy-duty trucks,
    and other vehicles that are unsuitable for dynamometer testing
    will be tested using an upgraded version of the existing idle
    emissions test.
    Another change is the addition of a fuel
    evaporative emissions control system test to check for possible
    tampering and system operation.
    (Tr.
    31-34.)
    Mr. Matheny stated that the enhanced vehicle I/N program
    will have an increased emission reduction effectiveness by a
    factor of three in the Chicago area and a factor of six in the
    Metro-East area over the existing program.
    By the end of 2000,
    the Agency expects the reduction in VOM emissions to increase
    from 35.2 tons per day
    (tpd) to 95.9 tpd in the Chicago area and
    from 1.9 tpd to 12.6 tpd in the Metro-East area.
    The Agency’s
    technical review has assertedly placed it in the position to
    prove to U.S. EPA that the enhanced I/M program will meet the
    federal requirements.
    Mr. Matheny asserted that the enhanced I/N
    program will reduce area VOM and nitrogen oxide
    (NOr) emissions
    to meet the federal program performance standards, provided the
    emissions standards proposed by the Agency are adopted by the
    Board.
    (Tr.
    34—36.)
    Mr. Matheny testified that the Agency proposed emissions
    standards identical to those recommended by U.S. EPA for use with
    the
    114 240 test.
    These include startup standards, for use during
    the first two years of program implementation, and final
    standards,
    for use after startup.
    He said that the startup
    standards are intended to smooth the transition from the existing
    testing to the enhanced program.
    The final standards are set at
    levels believed necessary to achieve compliance by 2000.
    Mr.
    Matheny explained that the IM 240 test provides model year groups
    within three vehicle classes:
    light duty vehicles (passenger
    cars),
    light duty trucks
    1
    (up to 6,000 pounds gross vehicle
    weight
    (gvwr)),
    and light duty trucks
    2
    (6,001 to 8,500 gvwr).
    Separate emissions standards are provided for vehicles certified
    for the tighter Tier
    1 emissions standards of the 1990
    CAA
    amendments.
    (Tr. 37—40
    & 49—50.)
    The Agency has proposed two standards for each model year—
    vehicle class group.
    The composite standards are mass emissions
    rates over the entire 240 seconds of the IN 240 test cycle.
    Phase
    2 standards are the emissions rates allowed over the second
    segment of the test cycle (seconds 94 through 239).
    A vehicle
    passes the IM 240 test if either the composite emissions levels
    are below the composite emissions standards or the Phase
    2
    emissions levels are below the Phase
    2 emissions standards for
    that model year and vehicle class for the vehicle.
    (Tr.
    40—41.)

    7
    Mr. Natheny stated that most other states implementing an
    enhanced 1/N program are using the federally-recommended IM 240
    test.
    He said that some states have chosen more stringent
    emissions limitations if necessary to achieve the federal
    performance standard for the particular nonattainment area.
    More
    stringent standards are used to offset program design
    differences,
    like model year and vehicle type exemptions
    in the
    particular area.
    (Tr.
    37-39.)
    Mr. Natheny testified that there are only very minimal
    differences in the emissions standards used in the steady—state
    idle test.
    He said that the Agency did not propose more
    stringent emissions standards for pre—1981 vehicles because doing
    so would have resulted in insignificant changes.
    The Vehicle
    Emissions Inspection Law of 1995 allows the use of the present
    steady-state idle exhaust test for vehicles in model years 1968
    through 1980,
    on heavy-duty vehicles (those with a gvwr greater
    than 8,500 pounds), and on any vehicle whose design or
    configuration does not allow the use of the IM 240 test.
    The
    only differences are the redefinition of heavy duty trucks
    (changing the lower weight limit from 8,000 pounds gvwr to 8,500
    gvwr), splitting light duty trucks into two categories
    (light-
    duty trucks
    1 and light-duty trucks
    2
    (and increasing the upper
    limit to 8,500 pounds gvwr), and lowering the carbon monoxide
    (CO) and unburned hydrocarbons
    (HC)
    emissions standards for post—
    1980 light-duty trucks
    (classes 1 and 2)
    (from 3.0
    to 1.2
    and
    300 parts per million
    (ppm)
    to 220 ppm, respectively).
    The
    steady-state idle test is further improved by using an “initial
    idle mode”,
    a high—idle “conditioning mode”, and a “second—chance
    idle mode”,
    to assure that any initial failure was not due to
    inadequate vehicle warm—up or preparation and giving each vehicle
    an immediate second chance to pass the test.
    (Tr.
    37-43.)
    The Agency intends to have all the regulations
    (both Board
    and Agency regulations)
    in place in early 1995, so it may begin
    implementation of the enhanced 1/14 program.
    The Agency is
    presently preparing a request for proposals to obtain a
    contractor to perform the testing.
    The Agency intends to enter
    into a contract by time the regulations are adopted.
    However,
    the Agency conceded that it is possible that it may submit a
    proposed SIP revision including the program even if some elements
    are not fully finalized.
    (Tr. 50-53.)
    A member of the general public questioned the Agency
    witnesses at the September 8,
    1994 public hearing.
    Mr. John
    Wright,
    of Martha Technologies inquired about the proposed
    release date for the Agency’s request for quotations on the
    testing contract.
    The Agency responded that it intended to
    release the~request in mid-October,
    for a possible contract
    inception date of January
    1,
    1996.
    (Tr.
    63-66.)
    Aside from
    questions by Board members and staff and the public comments

    8
    received, the Board received nothing further on the Agency’s
    proposal.
    Revisions to Agency’s Proposal
    As noted above, the Board is constrained to rely on the
    record in revising the Agency’s proposal without the Agency’s
    consent.
    The Board has,
    in fact, made a small number of
    corrections in the text of the rules as originally proposed by
    the Agency.
    In the First Notice proposal, we made agreed minor
    corrections prior to submission for publication in the Illinois
    Register.
    These very minor corrections were made with the prior
    consent of the Agency.
    They involved corrections to the Illinois
    Administrative Code-Illinois Register format of the proposed
    amendments and the elimination of a duplicate definition.
    At the September
    8 public hearing, the Agency further
    submitted an “errata sheet”
    (Ex.
    1).
    The changes made by the
    Board from the First Notice—proposed text based on this errata
    sheet included correction of the citation to the Vehicle
    Emissions Inspection Law of 1995 at Section 240.151
    (a change
    also requested by JCAR staff) and the addition of the words “at
    or” in two places in the fifth sentence of Section 240.164.
    The Agency later requested a single set of simple changes.
    As a result of this request, the Board has changed
    “=“
    in
    Sections 240.Table A and 240.Table B to
    “?“.
    This use of the
    correct scientific symbol comports with the Board’s general
    tendency to use the appropriate technical symbols for enhanced
    clarity.
    Beyond these Agency—consented changes, the Board has
    necessarily made minor revisions based on JCAR and Secretary of
    State
    (PC
    3)
    requests.
    We changed the Administrative Code-
    Illinois Register format of the definitions of “loaded mode” and
    “test procedure”
    in Section 240.102 in response to PC
    3 and
    JCAR’s “Identical First Notice Line Numbered Version”.
    In
    response to verbal JCAR requests, the Board has revised the
    format to citations to the Act at the main source note and at
    Sections 240.101 and 240.105(a);
    citations to the vehicle
    inspection statute at Sections 240.104,
    240.105(b), and 240.151;
    and citations to the Illinois Vehicle Code at Section 240.102
    (definition of “motor vehicle”).
    We further corrected
    punctuation in Section 240.102 in response to the verbal JCAR
    request:
    hyphenating “steady-state” in the definition of “high-
    idle”, removing the commas from the numbers in the definitions of
    “light duty truck 1” and “light duty truck 2”, and adding commas
    in the definitions of “motor vehicle” and “tier 1”.

    9
    A final change relates to codification constraints imposed
    on the Board by JCAR.
    JCAR has requested that the Board not
    include the date in citations to the Illinois Compiled Statutes.
    The text of the Agency proposal originally included these dates,
    but the Board deleted them upon request by JCAR.
    We believe that
    the dates are useful because subsequent statutory amendments
    would hinder any future research into the authorities cited.
    To
    accommodate JCAR and at least partially achieve the goal of
    complete citation to authorities, we have added a Board Note to
    Part 240.
    This follows our action with regard to Part 211,
    218,
    and 219 in R94—15 and R94—16.
    The record does not support revision of the Agency’s
    proposed amendments on any other basis.
    This is despite the
    comments of BFI
    (PC 2).
    BFI suggested that the Board should
    revise the language of Section 240.104 to incorporate the
    inspection applicability language from Section 13B—15 of the
    Vehicle Emissions Inspection Law of 1995.
    BFI states that
    confusion is possible relating to the applicability of the
    amended inspection regulations to diesel—powered vehicles.
    Section 13B—l5(f)(8) expressly exempts diesel-powered and
    exclusively electric-powered vehicles.
    BFI states that the
    presence of a definition of “diesel engine”
    in Section 240.102
    might confuse persons in the regulated community as to the
    applicability of the inspection requirements.
    The Agency responds that no change is desireable.
    First,
    the Agency highlights that the Section 240.104 applicability
    statement refers directly to Section 13B-15 for applicability.
    Second, the Agency highlights that Part 240 includes regulations
    for inspection of diesel—powered vehicles at Subparts B and C.
    (The vehicles subject to the enhanced I/N program are subject to
    Subparts B and D through F.)
    Third, the Agency asserts that
    incorporating the language of Section 13B-15 directly into
    Section 240.104 would require a regulatory amendment in the event
    of a statutory amendment before the Agency could implement the
    revised intent of the General Assembly.
    While the Board generally prefers to have the regulations
    appear in as complete a form as possible for clarity and the
    benefit of the regulated community, we agree with the Agency in
    this instance that the BFI-requested change is not desireable.
    We note that the universe of vehicles subject to inspection under
    the enhanced I/M program is essentially the same as it presently
    is under the existing program.
    (~
    625 ILCS 5/13A-104(d)(8).)
    Further, vehicles are subject to inspection upon notice to the
    owner by the Agency under both programs.
    (~
    625 ILCS 5/13A-
    104(a)
    & 13B-15(a).)
    Under these circumstances, the Board
    believes that the likelihood of confusion is minimal and that any
    such likelihood is quickly dispelled by reference to the Agency-
    proposed text of Section 240.104 and Section 13B—15 cited
    therein.

    10
    ORDER
    The Board directs the Clerk to cause the filing of the
    following proposal for Second Notice review by the Joint
    Committee on Administrative Rules:
    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
    2.40. 101
    240.102
    240. 103
    240.104
    240.105
    240.106
    240.107
    Section
    240. 121
    240. 122
    240. 123
    240.124
    240. 125
    Section
    240.140
    240.141
    Preamble
    Definitions
    Prohibitions
    Inspection
    Penalties
    Determination of Violation
    Incorporations by Reference
    SUBPART
    B:
    EMISSIONS
    Smoke Emissions
    Diesel Engine Emissions Standards for Locomotives
    Liquid Petroleum Gas Fuel Systems
    Vehicle Exhaust Emission Standards
    Compliance Determination
    SUBPART
    C:
    HEAVY-DUTY
    DIESEL
    SMOKE
    OPACITY STANDARDS AND TEST PROCEDURES
    Applicability
    Heavy-Duty Diesel Vehicle Smoke Opacity Standards and
    Test Procedures
    Section
    240. 151
    240.152
    240.153
    SUBPART D:
    STEADY-STATE IDLE MODE TEST
    EMISSION STANDARDS
    Ami~licability
    Steady—State Idle Mode Vehicle Exhaust Emission
    Standards
    Compliance Determination
    SUBPART E:
    TRANSIENT LOADED MODE TEST
    Section
    240.161
    EMISSION STANDARDS
    Applicability

    11
    240.162
    Vehicle Exhaust Emission Start-Up Standards
    240.163
    Vehicle Exhaust Emission Final Standards
    240.164
    Compliance Determination
    SUBPART
    F:
    EVAPORATIVE
    TEST
    STANDARDS
    Section
    240.
    171
    Applicability
    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
    AUTHORITY:
    Implementing Sections
    9,
    10
    and
    13 and authorized by
    Sections 27 and 28.5 of the Environmental Protection Act
    (Ill.
    Rev.
    Stat.
    1989,
    oh. 111
    1/2, pars.
    1009,
    1010,
    1013 and 1027)
    415
    ILCS 5/9,
    10,
    13,
    27, and 28.5)
    and Section 13B—20 of the
    Vehicle Emissions Inspection Law of 1995
    625
    ILCS 5/13B—201
    (see
    P.A.
    88—533, effective January
    18,
    1994).
    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—19 at
    Ill.
    Rep.
    effective
    BOARD NOTE:
    This Part implements the Environmental Protection
    Act as of July
    1,
    1994.
    NOTE:
    Capitalization denotes statutory language.
    SUBPART A:
    DEFINITIONS AND GENERAL PROVISIONS
    Section 240.101
    Preamble
    As the state of knowledge and technology relating to the control
    of emissions from motor vehicles shall permit and make
    appropriatcadvances, and in furtherance of the purposes of the
    Environmental Protection Act
    (Ill.
    flcv.
    Stat.
    1981,
    oh.
    111 1/2,
    pare.
    1001 Ct ~cq.)415
    ILCS
    5)
    (Act), the Pollution Control
    Board
    (Board)
    shall provide for by rules and regulations for the
    control of emissions from motor vehicles.
    Such rules and
    regulations shall prescribe requirements for the installation and
    use of equipment designed to reduce or eliminate emissions and
    for the proper maintenance of such equipment and of vehicles.
    Any rules and regulations promulgated pursuant to this Section
    shall be consistent with provisions of federal law,
    if any,
    relating to control of emissions from the vehicles concerned.

    12
    (Source:
    Amended at
    Ill.
    Reg.
    _______
    ,
    effective
    Section 240.102
    Definitions
    All terms which appear in this Part have the definitions
    specified in this Part and 35 Ill.
    Adni.
    Code 201 and 211.
    Where
    conflicting definitions occur,
    the definitions of this Section
    apply in this Part.
    “Diesel ~ngine”÷
    means A~lltypes of
    internal—combustion engines
    in which air is compressed
    to a temperature sufficiently high to ignite fuel
    injected directly into the cylinder area.
    “Diesel ~ocomotive”÷
    means A~,diesel engine vehicle
    designed to move cars on a railway.
    “Driver”:
    The
    came
    meaning
    ac defined in the Illinoic
    Vehicle Code,
    Ill.
    Rev.
    Ctat.
    1939,
    oh.
    95-1/2,
    par.
    116.1.
    IfFlcetIt:
    Five or more vehiclec.
    “Full
    Ppower
    Pposition”÷
    means
    ~he
    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 ~uty
    ~vehicle”÷ means Aany motor vehicle rated
    at more thanwith 8,0008500 pounds or greater
    manufacturer’s maximum grosc vehicle weight rating
    -(-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 ~jdle”÷ means ~hat
    portion of
    a two-~pecdsteady-
    state idle test conducted with the engine operating at
    a speed of approximately 2500 RPM.
    “Idle M~ode”+means ~hat
    portion of a vehicle emission
    test procedure conducted with the engine disconnected
    from an external load and operating at minimum
    throttle.
    “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.

    13
    ——~--
    ~——~-.L~———.-—-
    -
    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.
    “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 pro~ertvor 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 Dduty Vyehicle”÷means A
    passenger car
    uc~j.yncu
    to carry not more than 10 peroonsa 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 ~he
    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 Vvehicle”÷ Aas used in this section Part,~
    motor vchicle” shall have the same meaning as in

    14
    Section 1-146 of the Illinois Vehicle Code
    (Ill. Rev.
    Stat.
    1989,
    oh. 95 1/2,
    par. l-146)f625 ILCS 5/1—1461.
    “Opacity”:
    That fraction of light, expressed in
    percent, which when transmitted from a source through a
    smoke—obscured path,
    is prevented from reaching the
    observer or instrument receiver.
    “Preconditioning mode” means a period of steady—state
    loaded mode or high—idle operation conducted to ensure
    that the engine and emissions control system components
    are operating at normal operating temperatures, thus
    minimizing false failures caused by improper or
    insufficient warm—up.
    “Pressure test” means a test of a vehicle’s evaporative
    emission control system to verify the system’s
    integrity by identifying the presence of system leaks
    by iniecting an inert gas into the system and
    confirming the system’s ability to hold pressure over a
    specified period of time.
    “Purge test” means
    a test of the vehicle’s evaporative
    emission control system to determine the ability of the
    system to properly recycle gasoline vapors captured and
    adsorbed on the charcoal in the system’s canister.
    The
    purge test consists of determining the volume of vapor
    flow between the canister and the enqine as measured
    durin~the course of the transient loaded
    (114240)
    exhaust emissions test.
    “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 ~Qpacimeter”÷ means A~noptical
    instrument designed to measure the opacity of smoke or
    diesel exhaust gases using the light extinction method.
    “Snap-idle ~ycle”÷
    means R~apidlydepressing 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 cpecd~, 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

    15
    measurement of exhaust emissions followed,
    if
    necessary, by a loaded or high idle preconditioning
    mode and
    a second—chance idle mode.
    “Tier
    1” means the exhaust emission standards required
    by the Clean Air Act as amended in 1990 that require
    auto makers to reduce tailpipe emissions of
    hydrocarbons and oxides of nitrogen by 35
    and 60,
    respectively, from pre-existing standards, beginning
    with 40
    of the vehicles sold in 1994.
    80
    in 1995,
    and
    100
    thereafter.
    “Transient loaded mode test” means a vehicle emissions
    test run on an inertial and cower absorbing dynamometer
    using USEPA’s 1M240 driving cycle consisting of
    accelerations and decelerations simulating on—road
    driving conditions.
    “Test Procedure”+ means ~he
    preparation,
    preconditioning sequence and smoke opacity measurement
    processes using the snap idle cycle for determining
    compliance with Section 240.141.
    “Two—S~peed~idle ‘P~est”i-means A~,vehicle emission
    test procedure consisting of the measurements of
    exhaust emission in high idle and idle modes.
    (Source:
    Amended at
    Ill. Reg.
    ________
    ,
    effective
    Section 240.104
    Inspection
    All motor vehicles subject to inspection pursuant to Section
    l3A-l04 of the Illinois Vehicle Emissions Inspection Law
    (Ill.
    Rev.
    Stat.
    1085,
    Ch.
    95 1/2,
    par.
    13A—104) 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.
    All motor vehicles subiect to inspection pursuant to
    Section 13B—15 of the Illinois Vehicle Emissions Inspection Law
    of 1995
    (Vehicle Emissions Inspection Law of 1995)
    1625 ILCS
    5/13B—15
    (see P.A. 88—533, effective January 18.
    1994)
    shall
    com~lvwith applicable vehicle emission standards contained in
    Sections 240.152, 240.162,
    240.163, 240.172, and 240.173 of this
    Part.
    (Source:
    Amended at
    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

    16
    penalties
    as
    set
    forth
    in
    Section
    42 of the Act
    (Ill.
    Rev.
    Stat.
    1985,
    oh.
    lii
    1/2,
    par.
    1042)1415
    ILCS
    5/421.
    b)
    Any
    violations of Sections 240.104
    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
    (Ill.
    Rev. Stat.
    1985,
    oh.
    95
    1,’2,
    par.
    13A—112,
    13A—113)1625 ILCS 5/13A—1l2 and l3A—113).
    ~j
    Any violations of Sections 240.152, 240.162,
    240.163,
    240.172, and 240.173 of this Part shall be sub-ject to
    the penalties as set forth in Sections 13B—55 and 13B-
    60 of the Vechicle Emissions Inspection Law of 1995.
    (Source:
    Amended at
    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 Section~240.124,
    240.152,
    240.162.
    240.163,
    240.172,
    or 240.173 of this Part shall be
    determined in accordance with test procedures adopted
    by the Agency in 35 Ill. Adm. Code 276.
    (Source:
    Amended at
    Ill. Reg.
    ________
    ,
    effective
    _____________________________________________________
    )
    Section 240.107
    Incorporations by Reference
    The following materials are incorporated by reference and include
    no later editions or amendments:
    a)
    Society of Automotive Engineers
    (SAE),
    400 Commonwealth
    Drive,
    Warrendale, PA 15096:
    Report J255a Diesel
    Engine Smoke Measurement (August,
    1978).
    b)
    International Standards Organization
    (ISO), Case
    Postale 56,
    1211 Geneva 20,
    Switzerland:
    ISO 393
    (Working Draft, January 1991).
    Also available from
    American National Standards Institute (ANSI),
    11 West
    42nd Street, New York,
    NY 10036.
    ~j
    United States Environmental Protection Agency
    (tJSEPA),
    2565 Plymouth Road, Ann Arbor, MI 48105:
    Report EPA-
    AA—EPSD-IM-93-1, High—Tech
    1/14 Test Procedures,

    17
    Emission Standards, Quality Control Requirements, and
    Equipment Specifications
    (April 1994).
    (Source:
    Amended at
    Ill. Reg.
    ,
    effective
    _____________________________________________________
    )
    SUBPART
    B:
    EMISSIONS
    Section 240.124
    Vehicle Exhaust Emission Standards
    a)
    Exhaust emissions from light duty vehicles shall not
    exceed the following limitations:
    Carbon Monoxide Hydrocarbons as Hexane
    ()
    (ppm)
    9.0
    900
    8.0
    800
    7.0
    700
    6.0
    3.0
    1.2
    220
    b)
    Exhaust emissions from light duty trucks, which for the
    purposes of this subsection means a motor vehicle rated
    at 8000 rounds ~ross 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
    (ppm)
    1968
    1971
    900
    1972
    1974
    800
    1975
    1978
    700
    1979
    1980
    600
    1981
    1983
    300
    1984 and later
    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 cross
    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
    Model Year
    1968
    1971
    1972
    1974
    1975
    1977
    1978
    1979
    1980
    1981 and later
    600
    300
    Carbon Monoxide Hydrocarbons as Hexane
    ()
    9.0
    8.0
    7.0
    6.0
    3.0
    1.2
    3.0
    300

    18
    (Source:
    Amended at
    Ill. Reg.
    ________
    ,
    effective
    Section 240.125
    Compliance Determination
    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.
    (Source:
    Amended at
    Ill. Reg.
    ________
    ,
    effective
    SUBPART D:
    STEADY-STATE IDLE MODE TEST EMISSION STANDARDS
    Section 240.151
    Applicability
    The standards of Subpart D apply to all vehicles inspected upon
    implementation of the Vehicle Emissions Inspection Law of 1995
    and identified
    in Subsections 13B-25(c) and
    (d)
    of that law
    utilizing steady—state exhaust emission test procedures adopted
    by the Agency.
    (Source:
    Added at
    _____
    Ill. Reg.
    _______
    ,
    effective
    _____________________________________________)
    Section 240.152
    Steady-State Idle Mode Vehicle Exhaust
    Emission Standards
    ~j
    Exhaust emissions from light duty vehicles shall not
    exceed the following limitations:
    Model Year
    Carbon Monoxide Hydrocarbons as Hexane
    (~~m)
    1968
    1971
    1972
    1974
    ~Q_Q.
    1975
    1977
    1978
    1979
    6.0
    600
    1980
    1981 and later
    220
    ~j
    Exhaust emissions from light duty trucks
    1 and light
    duty trucks
    2 shall not exceed the following
    limitations:
    Model Year
    Carbon Monoxide Hydrocarbons as Hexane
    In
    Ipi,m)
    1968
    1971
    1972
    1974
    8.0
    800

    19
    1975
    1978
    7.0
    LQ&
    1979
    1980
    ~QQ
    1981 and later
    1.2
    220
    ~j
    Exhaust emissions from heavy duty vehicles shall not
    exceed the following limitations:
    Model Year
    Carbon Monoxide Hydrocarbons as Hexane
    IlL
    (ppm)
    1968
    1971
    1500
    1972
    1978
    900
    1979
    1984
    700
    1985
    and
    later
    3.0
    300
    (Source:
    Added at
    Ill.
    Reg.
    ________
    ,
    effective
    _____________________________________________ )
    Section
    240.153
    Compliance
    Determination
    Compliance
    shall
    be
    determined
    based upon the measurement of
    exhaust
    emissions
    using
    the
    steady-state
    idle
    test while the
    vehicle
    to
    be
    tested is operating in the idle mode.
    The vehicle
    shall pass exhaust emissions inspection
    if
    at
    any
    time
    during
    the
    initial idle mode or second-chance idle mode of the steady-state
    idle test the measured values are at or below the applicable
    limits of Section 240.152 of this Subpart.
    Vehicles failing the
    initial idle mode shall undergo a loaded or high idle
    preconditioning mode and receive
    a second—chance idle mode
    unless no measured values
    less than 1800 ppm HC are obtained
    within an elapsed time of 30 seconds.
    (Source:
    Added at
    Ill. Reg.
    ,
    effective
    _________________________________________ )
    SUBPART
    E:
    TRANSIENT LOADED MODE TEST EMISSION STANDARDS
    Section 240.161
    Applicability
    The standards of this Subpart a~~lvto model year 1981 and newer
    light duty vehicles, light duty trucks
    1. and light duty trucks
    2
    which are inspected utilizing transient IM240 loaded mode exhaust
    emission test procedures adopted by the Agency in 35 Ill. Adm.
    Code 276.
    (Source:
    Added at
    _____
    Ill. Reg.
    ________
    ,
    effective
    _______
    _____________________________________________)
    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 sublect to

    20
    inspection until December 31,
    1997.
    Tier
    1 standards shall apply
    to all model year 1996 and newer vehicles and model year 1994 and
    newer vehicles certified to Tier
    1 standards.
    All standards are
    expressed in grams per mile (qpm).
    (Source:
    Added at
    _____
    Ill. Reg.
    _______
    ,
    effective
    ______
    _____________________________________________)
    Section 240.163
    Vehicle Exhaust Emission Final Standards
    Vehicle exhaust emission final standards contained in Section
    240.Table B of this Part shall apply for all vehicles sublect to
    inspection beainning on January
    1,
    1998.
    Tier
    1 standards shall
    apply to all model year 1996 and newer vehicles and model year
    1994 and newer vehicles certified to Tier 1 standards.
    All
    standards are expressed in grams per mile (gpm).
    (Source:
    Added at
    _____
    Ill. Reg.
    _______
    ,
    effective
    ______
    Section 240.164
    Compliance Determination
    Compliance shall be determined based upon the measurement of
    exhaust
    emissions
    while
    operating
    the
    vehicle
    on
    a
    dynamometer
    and
    following
    the
    driving
    cycle
    as s~ecifled 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 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 ~o1lutant.
    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 Final Technical Guidance” incorporated by
    reference at Section 240.107 of this Part.
    (Source:
    Added at
    _____
    Ill.
    Reg.
    ________
    ,
    effective
    SUBPART
    F:
    EVAPORATIVE TEST STANDARDS
    Section 240.171
    Applicability

    21
    ~I
    The standards of Section 240.172 of this Subpart shall
    apply to all model year 1968 and newer vehicles
    required at the time of manufacture to be equipped with
    evaporative emission control systems.
    ~j
    The standards of Section 240.173 of this Subpart shall
    apply to model year 1981 and newer light duty vehicles.
    light duty trucks
    1, and light duty trucks
    2 that are
    inspected utilizing the transient loaded mode exhaust
    emission test procedures adopted by the Agency.
    (Source:
    Added at
    )
    Ill.
    Reg.
    _______
    ,
    effective
    Section 240.Table A:
    Vehicle
    Exhaust
    Emission
    Start-Up
    Standards
    Model Years
    Hydrocarbons
    Carbon Monoxide Oxides of Nitrogen
    Composite Phase
    2 Composite Phase
    2 Composite Phase
    2
    (ppm)
    (gpm)
    (ppm)
    (gpm)
    (ppm)
    (ppm)
    Tier
    1
    (1994+) 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
    ~Q
    Reserved
    Light Duty Trucks
    1:
    Light Duty Trucks
    2:
    0.80
    1.00
    2.40
    3.20
    3.20
    7.50
    0.50
    0.63
    1.50
    2.00
    2.00
    5.00
    15.0
    20.0
    60.0
    80.0
    80.0
    100.0
    12.0
    16.0
    48.0
    64.0
    64
    .
    0
    80.0
    2.0
    2.5
    3.0
    3.5
    7.0
    7.0
    Model Years
    Hydrocarbons
    Carbon Monoxide Oxides of
    Composite Phase
    2 Composite Phase
    2 Composite
    Nitrogen
    Phase
    2
    (gpm)
    (gpin)
    Tier
    1
    (1994+)
    (?3750
    LVW)
    (3750
    LVW)
    1991—1995
    (gpm)
    (gpm)
    (ppm)
    (ppm)
    Reserved
    Reserved
    Reserved
    1988—1990
    Reserved
    1984—1987
    Reserved
    1981—1983
    Model Years
    Hydrocarbons
    Carbon Monoxide Oxides of
    Composite Phase
    2 Composite Phase
    2 Composite
    (gum)
    (ppm)
    (gpm)
    (ppm)
    (gpm)
    Tier
    1
    (1994+)
    (?5750
    LVW)
    1.00
    0.63
    20.0
    16.0
    2.5
    (5750
    LVW)
    2.40
    1.50
    60.0
    48.0
    4.0
    1991—1995
    2.40
    1.50
    60.0
    48.0
    4.5
    Reserved
    Nitrogen
    Phase
    2
    (ppm)
    Reserved
    Reserved
    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

    22
    (Source:
    Added at
    _____
    Ill.
    Reg.
    ________
    effective
    Section 240.Table B:
    Vehicle Exhaust Emission Final
    Standards
    Li~htDuty Vehicles:
    Composite Phase
    2 Composite Phase
    2 Composite Phase
    2
    (ppm)
    (ppm)
    (cipm)
    (ctpm)
    (~m)
    (ppm)
    Tier
    1
    (1994+) 0.60
    0.40
    10.0
    ~
    Reserved
    1983—1995
    0.80
    0.50
    15.0
    12.0
    ~Q
    Reserved
    1981—1982
    0.80
    0.50
    30.0
    24.0
    ~
    Reserved
    Light
    Duty
    Trucks
    1:
    Light Duty Trucks
    2:
    IT
    IS
    SO
    ORDERED
    I, Dorothy N.
    Gunn,
    Clerk of the Illinois Pollution Control
    Board, hereby certify that the above opinion and order was
    adopted on the
    ___________________
    day of
    _____________________
    1994,
    by
    a
    vote
    of
    Model
    Years
    Hydrocarbons
    Carbon Monoxide Oxides of Nitrogen
    0.60
    0.80
    1.60
    1.60
    3.40
    0.40
    0.50
    1.00
    1.00
    2
    .
    00
    10.0
    13
    .
    0
    40.0
    40.0
    70.0
    8.0
    10.
    0
    32.0
    32.0
    56.0
    1.5
    1.8
    2.5
    4.5
    4.5
    Model Years
    Hydrocarbons
    Carbon Monoxide Oxides of
    Composite Phase
    2 Composite Phase
    2 Composite
    Nitrogen
    Phase
    2
    (ppm)
    (cipm)
    (gpm)
    (gpm)
    (gpm)
    (qpm)
    Tier
    1
    (1994+)
    Reserved
    Reserved
    Reserved
    (?3750 LVW)
    (3750
    LVW)
    1988—1995
    1984—1987
    Reserved
    1981—1983
    Model Years
    Hydrocarbons
    Carbon Monoxide Oxides of
    Composite Phase
    2 Composite Phase
    2 Composite
    Reserved
    Nitrogen
    Phase
    2
    (gpm)
    (gp~)
    (gpm)
    (ppm)
    (gpm)
    (gpm)
    Tier
    1
    (1994+)
    (?5750
    LVW)
    0.80
    0.50
    (5750
    LVW)
    0.80
    0.50
    1988—1995
    1.60
    1.00
    13.0
    10.0
    15.0
    12.0
    40.0
    32.0
    1.8
    2.0
    3~
    Reserved
    Reserved
    Reserved
    1984—1987
    1.60
    1.00
    40.0
    32.0
    j~
    Reserved
    1981—1983
    3.40
    2.00
    70.0
    56.0
    4.5
    Reserved
    (Source:
    Added at
    )
    Ill. Reg.
    ________
    ,
    effective

    23
    Dorothy M.
    Gunn,
    Clerk
    Illinois
    Pollution
    Control
    Board

    22
    (Source:
    Added at
    )
    Ill.
    Reg.
    ________
    effective
    St~ir~,
    24O..T~h1e~
    Vehicle
    F~eh~ust
    Thniesion Fin~1 Standards
    Light
    Duty
    Vehicles:
    Composite Phase
    2
    Composite
    Phase
    2 Composite Phase
    2
    (gpm)
    (qpm)
    (ppm)
    (ppm)
    (ppm)
    (~~m)
    Tier
    1
    (1994+)
    0.60
    0.40
    10.0
    .~Q
    ~
    Reserved
    1983—1995
    0.80
    0.50
    15.0
    12.0
    ~
    Reserved
    1981—1982
    0.80
    0.50
    30.0
    24.0
    ~
    Reserved
    Light
    Duty Trucks
    2:
    Model
    Years
    Hydrocarbons
    Carbon
    Monoxide
    Oxides
    of
    Nitrogen
    Light Duty Trucks
    1:
    Model
    Years
    Tier
    1
    (1994+)
    (?3750
    LVW)
    (3750
    LVW)
    1988—1995
    1984—1987
    198 1—19 83
    0.
    60
    0.80
    1.60
    1.60
    3.40
    0.40
    0.50
    1.00
    1.00
    2
    .
    00
    10.0
    13. 0
    40.0
    40.0
    70.0
    8.0
    10.0
    32.0
    32.0
    56.0
    Model
    Years
    1.5
    1.8
    2.5
    4.5
    4.5
    Hydrocarbons
    Carbon Monoxide Oxides of
    Composite Phase
    2 Composite Phase
    2 Composite
    Nitrogen
    Phase
    2
    (ppm)
    (gpm)
    (ppm)
    (qpm)
    (gpm)
    (ppm)
    Reserved
    Reserved
    Reserved
    Reserved
    Hydrocarbons
    Carbon Monoxide Oxides of
    Composite Phase
    2 Composite Phase
    2 Composite
    Reserved
    Nitrogen
    Phase
    2
    (gpm)
    (gpm)
    (ppm)
    (gpm)
    (ppm)
    (ppm)
    0.50
    13.0
    10.0
    Reserved
    0.50
    15.0
    12.0
    2.0
    Reserved
    1.00
    40.0
    32.0
    Reserved
    1.00
    400
    32.0
    j.~
    Reserved
    2.00
    70.0
    56.0
    j~
    Reserved
    Tier
    1
    (1994+)
    (?5750 LVW)
    (5750
    LVW)
    1988—1995
    1984—1987
    198 1—1983
    0.80
    0.80
    1.60
    1.60
    3.40
    (Source:
    Added at
    )
    Ill. Reg.
    ________
    ,
    effective

    23
    IT
    IS
    SO
    ORDERED
    I, Dorothy M. Gunn,
    Clerk of the Illinois Pollution Control
    Board,
    hereby
    certify
    that
    the
    above
    opinion
    ~nd
    order
    was
    adopted
    on
    the
    ________________
    day
    of
    £uI~~L~
    1994,
    by
    a vote of
    ~—O
    /7
    ~
    /~
    Dorothy
    M.
    G~4~n,Clerk
    Illinois
    Po(Zution
    Control
    Board

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