ILLINOIS POLLUTION CONTROL BOARD
    August 1, 1996
    IN MATTER OF:
    LISTING OF FEDERAL HAZARDOUS AIR
    POLLUTANTS, GREAT LAKES
    COMMISSIONS TOXIC COMPOUNDS
    AND GREAT WATERS PROGRAM TOXIC
    COMPOUNDS, AND SOURCE REPORTING
    FOR ILLINOIS TOXIC AIR
    CONTAMINANTS: AMENDMENTS TO 35
    ILL. ADM. CODE 232
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    R96-4
    (Rulemaking - Air)
    Proposed Rule. First Notice.
    OPINION AND ORDER OF THE BOARD (by J. Yi):
    Pursuant to Sections 9.5, 27 and 28 of the Environmental Protection Act (Act) (415 ILCS
    5/9.5, 27 and 28), the Illinois Environmental Protection Agency (Agency) filed this rulemaking proposal
    on October 13, 1995. In addition to the proposal the Agency filed a motion to waive certain filing
    requirements, to expedite the hearing process and to consolidate R90-1(C), In the Matter of: Toxic Air
    Contaminant List (35 Ill. Adm. Code 232); Reporting Requirements for Emission Sources and R90-
    1(D), In the Matter of: Toxic Air Contaminant List, Styrene (35 Ill. Adm. Code 232.Appendix A),
    into this proceeding.
    In our order of November 2, 1995 we granted the Agency's motions and found that the filing
    met the requirements of Sections 27 and 28 of the Act. The Board also accepted this matter for hearing
    and directed the hearing officer to set this matter for hearing. Additionally, the Board, in separate
    orders closed the dockets in both R90-1(C) and (D).
    The Board held two hearings in this matter. The first hearing was held on February 23, 1996 in
    Springfield, Illinois. The second hearing was held on April 9, 1996 in Chicago, Illinois. The post-
    hearing comment period ended May 17, 1996.
    Today the Board acts to send this rulemaking proposal for first notice. Pursuant to Section
    5.01 of the Illinois Administrative Procedure Act (IAPA) and Section 102.342 of the Board's
    procedural rules, the IAPA 45-day public comment period will commence upon publication of today's
    proposal in the Illinois Register, during which the Board will accept written comments from any person.
    Persons interested in providing additional comment on this proposal should submit such comments in
    writing to the Clerk of the Board prior to the expiration of this 45-day period.
    The Board will not hold

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    any hearings beyond those that have already been held unless a written request for hearing is
    received by the Clerk of the Board.
    PURPOSE OF PROPOSAL
    The proposal has two (2) main purposes both of which are connected to the Illinois's Toxic Air
    Contaminants (ITAC) list. First, the proposal intends to update the ITAC by adding chemicals or
    substances either listed as federal Hazardous Air Pollutants (HAPs) under Section 112(b) of the Clean
    Air Act (CAA) as amended in 1990, or targeted as chemicals or compounds of concern under the
    United States Environmental Protection Agency's (USEPA) "Great Waters" program under Section
    112(m) of the CAA to 35 Ill. Adm. Code 232.Appendix A. In addition to updating ITAC, the
    proposal will require all sources that meet the applicability criteria to submit an ITAC Source Report for
    the calendar year 1996. Finally the proposal will correct typographical errors in the current ITAC list.
    PROPOSED AMENDMENTS
    This portion of the opinion will discuss the proposed amendments to 35 Ill. Adm. Code 232
    section by section.
    Section 232.120 Definitions
    The proposed amendments to Section 232.120 are to delete definitions no longer applicable to
    this Part as a result of revisions to 35 Ill. Adm. Code 211 and to add definitions of “commercial fuel”,
    “Illinois Toxic Air Contaminant” (ITAC), “ITAC Source Report”, “manufacture”, “otherwise use”,
    “prices”, and “Toxic Air Contaminant” (TAC). The definition of “commercial fuel” is necessary
    because Section 9.5(e)(3) of the Act exempts emissions of ITACs from combustion processes using
    commercial fuel from the source reporting requirements. The definitions of “manufacture”, “otherwise
    use” and “process” have also been added to address applicability thresholds, and these definitions are
    identical in substance to those in Section 313 of the Emergency Planning and Community Right-to
    Know Act, Title III of Superfund Amendments and Reauthorization Act of 1986 (SARA 313) (42
    U.S.C. 11001
    et seq
    .) The definitions of ITAC and TAC have been added to delineate only those
    chemicals listed in Appendix A that are subject to this proposal. “ITAC Source Report” has been
    added as a definition to address what information is required to be reported under this proposal.
    Section 232.120 has also been revised to delete the definitions of “New emission source” and
    “Process unit” since these definitions are inconsistent with, or are no longer necessary because of, earlier
    revisions to Part 211.
    The Agency’s proposal to the Board suggested that the definition of “‘Emits’ or ‘Emissions’ or
    ‘Emitted’”, be deleted because of earlier revisions to Part 211. However contained in the definition of
    “‘Emits’ or ‘Emissions’ or ‘Emitted’”, is the definition of “Fugitive emission” which is not defined in
    either Part 201 or 211. The definition of “Fugitive emission” is at Section 203.124. Since Parts 201

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    and 211 do not contain a definition of “Fugitive emission” we will delete the definition of “‘Emits’ or
    ‘Emissions’ or ‘Emitted’” but retain the definition for “Fugitive emission”.
    Subpart D: Source Identification Requirements
    Sections 232.400 through 232.460, contain the requirements relating to source reporting.
    Section 232.400 states the purpose of Subpart D.
    Section 232.410(a) provides the applicability threshold: any source that manufactures,
    processes, or imports 25,000 lbs. or more of any individual ITAC in any calendar year; or otherwise
    uses 10,000 lbs. of any individual ITAC in any calendar year. Section 232.410(b) lists those processes
    or operations that are not subject to Subpart D, and incorporates the exemptions in Section 9.5(e) of
    the Act. Section 232.410(c) provides for an additional applicability threshold, beyond the threshold in
    232.410(a).
    Section 232.420 provides that the Agency will supply to all sources expected to be affected by
    this proposal an ITAC Source Report that contains all the data fields required by Subpart D. This
    report is designed to assist affected sources in complying with the requirements of Subpart D, although
    the information need not be submitted on this form. The ITAC Source Report form is similar to the
    form being utilized through SARA 313.
    Section 232.421 requires that all emission reports submitted pursuant to Subpart D be certified,
    and specifies the criteria for a certifying individual, as well as the required certification.
    Section 232.423 provides that the failure of an affected source to receive an ITAC Source
    Report from the Agency does not relieve a source from the obligation to file an emissions report.
    Section 232.430(a) specifies the date by which a source must file an emissions report and lists
    the information required to be submitted. Section 232.430(b) lists which emissions of ITACs are
    considered to be
    de minimis
    and therefore not subject to reporting. Section 232.430(c) specifies the
    date for reporting for sources that become subject to this proposal after January 1, 1996. Section
    232.430(d), (e), and (f) list when a source must submit a revised emissions report to the Agency.
    Section 232.440 allows a source to use engineering estimates to determine emissions if the type
    of estimate is reasonable, is specified, is the best information available, and notes that this Subpart does
    not require monitoring or testing in connection with these emissions reports.
    Section 232.450(a) provides that the Agency may request additional information, beyond that
    initially submitted or specified in Section 232.430. Section 232.450(b) specifies that a source must
    retain records upon which the data included in the emissions report is based for a minimum period of
    three years, and must make these records available to the Agency upon request.

    4
    Section 232.460 requires a source to correct any errors in the data previously submitted within
    60 days of discovering such error.
    Subpart E: Listing and Delisting
    Section 232.501 contains an explanation for the inclusion of the chemicals and compound listed
    as HAPs under Section 112(b) of the CAA and for the inclusion of the “Great Waters” program
    targeted compounds under Section 112(m) of the CAA, and exempts these new compounds from the
    listing requirements of Section 232.500.
    Section 232.Appendix A List of Toxic Air Contaminants
    Appendix A has been amended to add the HAPS and Great Waters TACs not previously listed, and to
    denote the compounds as either HAPs, Great Water TACs, or both. Furthermore, Appendix A has
    also been revised to correct typographical errors and errors in the Chemical Abstract Service (CAS)
    numbers for previously listed chemicals.
    ORDER
    The Board hereby proposes the following regulations for First Notice pursuant to the IAPA.
    The Board directs the Clerk to cause publication of these regulations in the Illinois Register for first
    notice. (The text starts on the following page.)

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    TITLE 35: ENVIRONMENTAL PROTECTION
    SUBTITLE B: AIR POLLUTION
    CHAPTER I: POLLUTION CONTROL BOARD
    SUBCHAPTER f: TOXIC AIR CONTAMINANTS
    PART 232
    TOXIC AIR CONTAMINANTS
    SUBPART A: GENERAL PROVISIONS
    Section
    232.100
    Introduction
    232.110
    Incorporations by Reference
    232.120
    Definitions (Repealed)
    232.130
    Applicability
    SUBPART B: DETERMINATION OF A TOXIC AIR
    CONTAMINANT
    Section
    232.200
    Characteristics for Determining a Toxic Air Contaminant
    SUBPART C: PROCEDURES FOR EVALUATING
    CHARACTERISTICS OF A TOXIC AIR CONTAMINANT
    Section
    232.300
    Purpose
    232.310
    Procedures for Determining the Toxicity Score
    232.320
    Carcinogen Classification
    SUBPART D: SOURCE IDENTIFICATION REQUIREMENTS
    Section
    232.400
    Purpose
    232.410
    Applicability
    232.420
    ITAC Source Report
    232.421
    Emissions Report Certification
    232.423
    Failure to Receive an ITAC Source Report
    232.430
    Emissions Report
    232.440
    Use of Available Data
    232.450
    Retention of Records
    232.460
    Reporting of Errors

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    SUBPART E: LISTING AND DELISTING
    Section
    232.500
    Procedures for Listing and Delisting Toxic Air Contaminants
    232.501
    Listing of Federal Hazardous Air Pollutants, Great Lakes Commission Toxic
    Compounds and Great Waters Program Toxic Compounds
    APPENDIX A:
    List of Toxic Air Contaminants
    APPENDIX B:Additional Procedures for Calculating the Chronic Toxicity Score
    APPENDIX C:
    Carcinogens (Categories A, B1, and B2) listed on the Integrated Risk
    Information System (IRIS) as of December 31, 1989 (United States
    Environmental Protection Agency, Office of Health and Environmental
    Assessment)
    AUTHORITY: Implementing Section 9.5 and authorized by Section 27 of the Environmental
    Protection Act [415 ILCS 5/9.5 and 27].
    SOURCE: Adopted in R90-1 at 16 Ill. Reg. 16592, effective October 18, 1992; amended in R__-__
    at _____ Ill. Reg. __________, effective ______________199_.
    SUBPART A: GENERAL PROVISIONS
    Section 232.120
    Definitions (Repealed)
    The definitions of 35 Ill. Adm. Code 201.102, 211.122 and 215.104, 201 and 211 apply to this Part,
    as well as the definitions contained in this Section. Where a definition contained in this Section is more
    specific than those found in 35 Ill. Adm. Code 201.102, 211.122 and 215.104 201 and 211, it must
    take precedence in application of this Part.
    "ACGIH" means the American Conference of Governmental Industrial Hygienists.
    "Adverse health effect" means a health injury or disease that may be produced by exposure to a
    contaminant. This includes any decrement in the function of an organ or organ system or any
    subclinical organ lesion that is likely to lead to a decrement in an organ or organ system function.
    "Commercial fuel" means:
    a)
    Any fuel offered for final sale for use in combustion processes;

    7
    b)
    Any gaseous fuel generated as a by-product at a source for which the source has been
    issued an operating permit to use such fuel internally in combustion processes, including
    internal combustion engines; or
    c)
    Any waste derived fuel for which an operating permit has been issued and which
    represents no more than five percent (.05) by weight on a daily basis of total fuel used in
    combustion processes by a source.
    "Critical gestation days" means the days during which the formation and differentiation of organs
    and organ systems occurs during embryonic development.
    "Emits" or "Emission" or "Emitted" means any non-accidental release into the atmosphere from
    an emission source or air pollution control equipment, or fugitive emissions defined according to
    35 Ill. Adm. Code 203.124.
    “Fugitive emissions” is defined according to 35 Ill. Adm. Code 203.124.
    "IARC" means the World Health Organization's International Agency for Research on Cancer.
    "IRIS" means the USEPA's Integrated Risk Information System.
    "Illinois Toxic Air Contaminant" (ITAC) means any toxic air contaminant listed pursuant to 35
    Ill. Adm. Code 232, excluding, specifically: coke oven gas; any hazardous air pollutant (HAP)
    now or hereafter listed under Section 112(b) of the Clean Air Act (CAA), as amended; and any
    pollutant or contaminant listed as a compound of concern under the Great Waters Program
    under Section 112(m) of the CAA.
    "ITAC Source Report" means the report that the Agency provides to the source that lists data
    fields for the information required in the emissions report for Subpart D of this Part, and
    contains the information, if any, that previously has been reported to the Agency for those data
    fields.
    "LC50" means the concentration in the air of a contaminant that kills, or is estimated to kill, fifty
    percent (.50) of a population of laboratory animals where the exposure is brief (8 hours or less)
    and where the route of exposure is inhalation.
    "LD50" means the dose of a contaminant that kills, or is estimated to kill, 50 percent of a
    population of laboratory animals where the route of exposure is ingestion.
    "Lowest observed adverse effect level" means the lowest experimentally determined dose at
    which a statistically or biologically significant indication of the toxic effect of concern is
    observed.

    8
    "Manufacture" means, for the purposes of 35 Ill. Adm. Code Sections 232.400 through
    232.460 of this Part, to produce, prepare, or compound a listed ITAC, and includes
    coincidental production of an ITAC (e.g., as a by-product or impurity) as a result of the
    manufacture, processing or otherwise use or treatment of one or more chemical substances not
    an ITAC. An ITAC intentionally incorporated into a product is considered to be manufactured.
    "NTP" means the United States' Department of Health and Human Services, Public Health
    Services' National Toxicological Program.
    "New emission source" means an emission source or air pollution control equipment for which a
    construction permit is required by 35 Ill. Adm. Code 201 after (the effective date of these
    rules); or an emission source or air pollution control equipment for which an operating permit is
    required by 35 Ill. Adm. Code 201, where the owner or operator failed to apply for a
    construction permit and applies for the first operating permit.
    "No observed effect" means the condition where no adverse health effect has been detected.
    "Otherwise use" means, for the purposes of 35 Ill. Adm. Code Sections 232.400 through
    232.460 of this Part, any activity involving a listed ITAC at a source that does not fall within the
    definitions of "manufacture" or "process."
    "Process" means, for the purposes of 35 Ill. Adm. Code Sections 232.400 through 232.460 of
    this Part, the preparation of an ITAC after its manufacture for distribution in commerce in the
    same physical state as, or in a different form or physical state from, that in which it was received
    by the source, or preparation that produces a change in physical state or chemical form.
    "Process unit" shall have the meaning set forth in 35 Ill. Adm. Code Section 211.5210.
    "Toxic air contaminant" (TAC) means a contaminant identified pursuant to Section 232.200 or
    Section 232.501 of this Part and listed in Appendix A of this Part.
    (Source: Amended at _____ Ill. Reg. __________, effective ______________199_.)
    SUBPART D: SOURCE IDENTIFICATION REQUIREMENTS
    Section 232.400
    Purpose
    This Subpart establishes identification and reporting requirements for new and existing sources that emit
    Illinois Toxic Air Contaminants.
    (Source: Added at _____ Ill. Reg. _______, effective ______________199_.)

    9
    Section 232.410
    Applicability
    a)
    This Subpart shall apply to any owner or operator of a source that manufactures,
    processes or imports 25,000 lbs or more of any individual ITAC in any calendar year
    or otherwise uses 10,000 lbs of any individual ITAC in any calendar year.
    b)
    This Subpart shall not apply to the following:
    1)
    Retail dry cleaning operations;
    2)
    Retail and noncommercial storage and handling of motor fuels;
    3)
    Combustion processes, including internal combustion engines, using only
    commercial fuel; and
    4)
    Equipment and operations which are exempt from permitting requirements
    pursuant to 35 Ill. Adm. Code 201.146;
    c)
    If an ITAC is present in a mixture of chemicals at a source at a concentration below one
    percent (0.01) by weight, or one-tenth of one percent (.001) by weight in the case of an
    ITAC which is a carcinogen listed in Appendix C of this Part, an owner or operator
    subject to this Subpart is not required to consider the quantity of the ITAC in such
    mixture when determining whether an applicable threshold has been met under
    subsection (a) of this Section or in determining the amount of emissions to be reported
    under Section 232.430 of this Part.
    (Source: Added at _____ Ill. Reg. ______, effective ______________199_.)
    Section 232.420
    ITAC Source Report
    a)
    On or before April 1, 1997, the Agency shall provide to the owner or operator of a
    source subject to this Subpart the ITAC Source Report. The ITAC Source Report
    shall contain all data fields for the information required under this Subpart.
    b)
    The information on emissions provided by the owner or operator of a source in the
    emissions report shall be based on the best information available to the owner or
    operator and that is reflective of the operations of the source and its ITAC emissions.
    (Source: Added at _____ Ill. Reg. _____, effective ______________199_.)
    Section 232.421
    Emissions Report Certification

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    All emission reports filed pursuant to this Subpart shall contain the following certification statement: "All
    emissions data verified, modified or provided on behalf of the source named above represents the best
    available information and is true and accurate to the best of my knowledge." The certification statement
    shall be signed by an individual responsible for the accuracy of the emissions report and who will take
    legal responsibility for the information verified or reported therein. The certification statement shall be
    accompanied by the full name, title, actual signature, date of signature, and a telephone number of the
    individual signing the emissions report.
    (Source: Added at _____ Ill. Reg. _____, effective ______________199_.)
    Section 232.423
    Failure to Receive an ITAC Source Report
    Failure to receive the ITAC Source Report from the Agency shall not relieve an owner or operator from
    the obligation to file a complete emissions report. Any owner or operator who does not receive the
    ITAC Source Report on or before April 1, 1997, may contact the Agency to request the ITAC Source
    Report.
    (Source: Added at _____ Ill. Reg. _____, effective ______________199_.)
    Section 232.430
    Emissions Report
    a)
    On or before July 1, 1997, the owner or operator of a source subject to this Subpart
    shall file an emissions report for the calendar year 1996 which shall include the following
    information:
    1)
    Source identification information; and
    2)
    Identify by generic name and Chemical Abstract Service (CAS) number, the
    source’s actual annual emissions of each ITAC expressed in tons per year
    (TPY), and the source's annual fugitive emissions of each ITAC, expressed in
    TPY, for each ITAC that exceeds the threshold for applicability as set forth in
    Section 232.410 of this Part. In determining the actual annual emissions of each
    ITAC, the source may exclude emissions of such ITAC from all emission units
    with de minimis emissions of ITACs.
    b)
    The following emissions of ITACs shall be considered to be de minimis and shall not be
    subject to reporting requirements under this Subpart:
    1)
    Emissions of ITACs from an emission unit which, in the aggregate, are less than
    one-half (0.5) TPY;

    11
    2)
    Emissions from a process unit resulting from a process vent stream with ITAC
    concentrations that are always less than one-tenth of one percent (0.001) by
    weight on a daily basis, if such concentrations include any carcinogen listed in
    Appendix C of this Part;
    3)
    Emissions from a process unit resulting from a process vent stream with ITAC
    concentrations that are always less than one percent (0.01) by weight on a daily
    basis, if such concentrations do not include any carcinogen listed in Appendix C
    of this Part; or
    4)
    Fugitive emissions of ITACs from a process unit which, in the aggregate, are
    less than one-half (0.5) TPY.
    c)
    If a source becomes subject to this Subpart on or after January 1, 1996, the owner or
    operator of the source shall submit an emissions report to the Agency on or before July
    1 of the year following the date the source becomes subject to this Subpart for the
    period from the date the source first becomes subject to this Subpart through the end of
    the calendar year before the year the first report from such source is due under this
    Subpart. Such emissions report shall contain all of the information listed in subsections
    (a)(1), (a)(2), and (a)(3) of this Section and any additional information requested by the
    Agency pursuant to Section 232.450 of this Part. Any such emissions report shall
    satisfy the requirements of Sections 232.410, 232.420, 232.421, 232.423, 232.430,
    232.440, 232.450, and 232.460 of this Part.
    d)
    An owner or operator of a source subject to this Subpart shall submit to the Agency a
    revised, correct emissions report on or before July 1 of the year following the
    occurrence of any of the following:
    1)
    If the source's actual annual emissions of any individual ITAC or any
    combination of ITACs required to be reported under this Subpart increases by
    more than one-half (0.50) TPY or one (1) TPY, respectively, from the sources'
    emissions of ITACs initially reported under this Subpart; or
    2)
    If the source emits an ITAC that exceeds the threshold for applicability as set
    forth in Section 232.410 of this Part which was not previously reported in the
    source's initial report of its emissions of ITACs or in any subsequent revised
    report of its emissions of ITACs required to be submitted pursuant to this
    subsection.
    e)
    Any revised emissions report required to be submitted under subsection (d) of this
    Section shall contain all of the information listed in subsection (a) of this Section and any
    additional information requested by the Agency pursuant to Section 232.450 of this

    12
    Part. Any revised emissions report shall satisfy the requirements of Sections 232.410,
    232.420, 232.421, 232.423, 232.430 232.440, 232.250, and 232.450 of this Part.
    f)
    By July 1 of the calendar year following any modification or change to an emission unit
    requiring a revision to an existing permit or a new permit and which may result in an
    increase in emissions of a previously reported ITAC by ten percent (.10) or more, an
    owner or operator of a source subject to this Subpart shall submit to the Agency a
    revised emissions report which includes the information required under Section 232.430
    of this Part.
    (Source: Added at _____ Ill. Reg. _____, effective _______________199_.)
    Section 232.440
    Use of Available Data
    a)
    In order to provide the information required under this Subpart, the owner or operator
    of a source may:
    1)
    Use reasonable engineering estimates of total emissions of individual ITACs
    pursuant to an emissions determination method, if, in each case, the owner or
    operator of a source specifies the emissions determination method used to
    estimate total emissions and certifies that such data represents the best available
    information and is true and accurate to the best of his/her knowledge; or
    2)
    If available, monitoring or measuring data collected pursuant to other provisions
    of law or regulation.
    b)
    Nothing in this Subpart requires the monitoring or measurement of the quantities,
    concentrations, or frequency of emissions of any ITAC beyond any monitoring or
    measurement required under other provisions of law or regulation.
    (Source: Added at _____ Ill. Reg. _____, effective ______________199_.)
    Section 232.450
    Retention of Records/ Additional Information
    a)
    For purposes of modeling and conducting assessments of information submitted under
    this Subpart, the Agency may request supporting documentation or additional
    information for any emissions report submitted by a source, including:
    1)
    An identification by generic name and Chemical Abstract Service (CAS)
    number the source’s emissions of each ITAC by emission unit, with maximum
    hourly emission rates in lbs/hr and actual annual emissions in TPY and the
    source's fugitive emissions of each ITAC in TPY;

    13
    2)
    Operating data, exhaust point information and, if applicable, control device
    information for each emission unit; and
    3)
    Copies of engineering estimate calculations, mass balance calculations, and any
    other information or documentation used by the owner or operator of a source
    in preparing an emissions report.
    b)
    All records and calculations upon which the data submitted in the emissions report are
    based must be retained by the source for a minimum of three (3) years following the
    filing of a complete report. The owner or operator of a source shall provide the
    requested information in a format acceptable to the Agency within 60 days after the
    receipt of the request.
    c)
    Nothing in this Section shall be interpreted to impose upon any source subject to this
    Subpart any additional monitoring which is not otherwise required by applicable rules or
    a permit condition.
    (Source: Added at _____ Ill. Reg. _____, effective ______________199_.)
    Section 232.460
    Reporting of Errors
    If, after submitting any emissions report required by this Subpart, the owner or operator of a source
    discovers any error in the data reported, the owner or operator shall notify the Agency of the error in
    writing and shall provide the Agency with the correct data. The notification and correction shall be
    conveyed to the Agency within sixty (60) days after the owner's or operator's discovery of the error.
    The corrected data shall be certified in accordance with Section 232.421 of this Part.
    (Source:
    Added at _____ Ill. Reg. ______, effective ______________199_.)
    SUBPART E: LISTING AND DELISTING
    Section 232.501
    Listing of Federal Hazardous Air Pollutants, Great Lakes Commission Toxic
    Compounds and Great Waters Program Toxic Compounds
    Notwithstanding the provisions of Section 232.500 of this Part, all chemicals listed as "hazardous air
    pollutants" under Section 112(b) of the CAA, as amended in 1990 (42 U.S.C. 7412(b)), and all
    chemicals targeted as toxic compounds or chemicals by the Great Lakes Commission or under the
    United States Environmental Protection Agency's "Great Waters" Program which are not currently listed
    as toxic air contaminants under this Part, are hereby listed as toxic air contaminants under Appendix A
    of this Part. The listing of hazardous air pollutants and other toxic compounds or chemicals as toxic air

    14
    contaminants under this Section is without reference to the listing procedures of Section 232.500 of this
    Part.
    (Source:
    Added at Ill. Reg. , effective , 199 .)
    Section 232.APPENDIX A List of Toxic Air Contaminants
    Chemical Name
    CAS Number
    Acetaldehyde
    75-07-0*
    Acetamide
    60-35-5*
    Acetonitrile
    75-05-8*
    Acetophenone
    98-86-2*
    2-Acetylaminofluorene
    53-96-3*
    Acrolein
    107-02-8*
    Acrylamide
    79-06-1*
    Acrylic acid
    79-10-7*
    Acrylonitrile
    107-13-1*
    Aldrin
    309-00-2**
    Allyl chloride
    107-05-1*
    2-Aminoanthraquinone
    117-79-3
    4-Aminoazobenzene
    60-09-3
    o-Aminoazotoluene
    93-56-3
    4-Aminobiphenyl
    92-67-1*
    1-Amino-2-methylanthraquinone
    82-28-0
    Amitrole
    61-82-5
    Aniline
    62-53-3*
    o-Anisidine
    90-04-0*
    o-Anisidine hydrochloride
    134-29-2
    Antimony
    7440-36-0
    Arsenic
    7440-38-2
    Asbestos (friable)
    1332-21-4*
    Azobenzene
    103-33-3
    Benzo(a)anthracene
    56-55-3
    Benzene
    71-43-2*
    Benzidine
    92-87-5*
    Benzo(a)pyrene
    50-32-8**
    Benzo(b)fluoranthene [3,4-Benzofluoronthene]
    205-99-2**
    Benzo(j)fluoranthene
    205-82-3
    Benzo(k)fluoranthene [11,12-Benzofluoranthene]
    207-08-9**
    1,12-Benzoperylene
    191-24-2**
    Benzotrichloride
    98-07-7*

    15
    Benzyl chloride
    100-44-7*
    Benzyl violet
    1694-09-3
    Beryllium
    7440-41-7
    Beryllium oxide
    1304-56-9
    Biphenyl
    92-52-4*
    Bis(chloromethyl)ether
    542-88-1*
    Boron trifluoride
    7637-07-2
    Bromoform
    75-25-2*
    4-Bromophenyl phenyl ether
    101-55-3**
    1,3-Butadiene
    106-99-0*
    Butyl benzyl phthalate
    85-68-7
    beta-Butyrolacetone
    3068-88-0
    C.I. Basic Red 9 monohydrochloride
    569-61-9
    Cadmium
    7440-43-9
    Cadmium oxide
    1306-19-0
    Calcium cyanamide
    156-62-7*
    Caprolactam
    105-60-2*
    Captan
    133-06-2*
    Carbaryl
    63-25-2*
    Carbofuran
    1563-66-2
    Carbon black
    1333-86-4
    Carbon disulfide
    75-15-0*
    Carbon tetrachloride
    56-23-5*
    Carbonyl sulfide
    463-58-1*
    Carbosulfan
    55285-14-8
    Catechol
    120-80-9*
    Chloramben
    133-90-4*
    Chlordane
    57-74-9††
    Chlorinated dibenzodioxins
    --
    Chlorinated dibenzofurans
    --
    Chlorendic acid
    115-28-6
    Alpha-Chlorinated toluenes
    --
    Chlorinated paraffins ([C12, 60% chlorine)]
    108171-26-2
    Chlorine
    7782-50-5*
    Chloroacetic acid
    79-11-18*
    2-Chloroacetophenone
    532-27-4*
    Chlorobenzene
    108-90-7*
    Chlorobenzilate
    510-15-6*
    Chloroform
    67-66-3*
    Chloromethyl methyl ether
    107-30-2*
    34-Chloro-2-methylpropene
    563-47-3
    4-Chloro-o-phenylenediamine
    95-83-0

    16
    p-Chloro-o-toluidine
    95-69-2
    4-Chlorophenyl phenyl ether
    7005-72-3**
    Chloroprene
    126-99-8*
    Chromium
    7440-47-3
    Chromium (VI)
    18540-29-9
    Chrysene
    218-01-9
    Coal tar (pitch) volatiles
    65996-93-2
    Cobalt
    7440-48-4
    Coke Oven Emissions
    --
    Copper
    7440-50-8
    p-Cresidine
    120-71-8
    Creosote (Coal)
    8001-58-9
    Cresol (mixed isomers) [Cresols/Cresylic acid
    (isomers and mixture)]
    1319-77-3*
    o-Cresol
    95-48-7*
    m-Cresol
    108-39-4*
    p-Cresol
    106-44-5*
    Cumene
    98-82-8*
    Cyanazine
    21725-46-2
    Cyclohexanone
    108-94-1
    DDD
    72-54-8
    DDE
    3547-04-4*
    4,4'-DDE
    72-55-9**
    DDT
    50-29-3**
    Di-n-octyl phthalate
    117-84-0**
    2,4-Diaminoanisole
    615-05-4
    2,4-Diaminoanisole sulfate
    39156-41-7
    4,4'-Diaminodiphenyl ether
    101-80-4
    2,4-Diaminotoluene
    95-80-7*
    Diazomethane
    334-88-3*
    Dibenzo(a,h)acridine
    226-36-8
    Dibenzo(a,j)acridine
    224-42-0
    Dibenzo(a,h)anthracene [1,2:5.6-Dibenzanthracene]
    53-70-3**
    Dibenzo(a,e)pyrene
    192-65-4
    Dibenzo(a,h)pyrene
    189-64-0
    Dibenzo(a,i)pyrene
    189-55-9
    Dibenzo(a,l)pyrene
    191-30-0
    Dibenzofurans
    132-64-9*
    Dibutyl phthalate
    84-74-2††
    1,2-Dibromo-3-chloropropane
    96-12-8*
    1,2-Dibromoethane [Ethylene dibromide]
    106-93-4*
    1,4-Dichlorobenzene(p-)
    106-46-7*

    17
    3,3'-Dichlorobenzidine
    91-94-1*
    3,3'-Dichlorobenzidine dihydrochloride
    612-83-9
    Dichloroethyl ether
    [Bis(2-chloroethyl)ether]
    111-44-4*
    2,4-Dichlorophenoxyacetic acid
    [2,4-D,salts and esters]
    94-75-7*
    1,2-Dichloropropane
    [Propylene dichloride]
    78-87-5*
    1,3-Dichloropropylene [1,3-Dichloropropene]
    542-75-6*
    Dichlorvos
    62-73-7*
    Dieldrin
    60-57-1**
    Diepoxybutane
    1464-53-5
    Diethanolamine
    111-42-2*
    N,N-Diethyl aniline [N,N-Dimethylaniline]
    121-69-7*
    1,2-Diethylhydrazine
    1615-80-1
    Di(2-ethylhexyl) pPhthalate [Bis(2-ethylhexyl)
    phthalate (DEHP)]
      
    117-81-7*
    Diethyl sulfate
    64-67-5*
    Diglycidyl resorcinol ether
    101-90-6
    3,3'-Dimethoxybenzidine [Dianisidine]
    119-90-4*
    Dimethyl acetamide
    127-19-5
    Dimethyl phthalate
    131-11-3*
    4-Dimethyl aminoazobenzene [Dimethyl aminoazo-
    benzene]
    60-11-7*
    3,3'-Dimethyl benzidene [o-Tolidine]
    119-93-7*
    Dimethyl carbamoyl chloride
    79-44-7*
    N,N-Dimethyl formamide
    68-12-2*
    1,1-Dimethyl hydrazine
    57-14-7*
    1,2-Dimethyl hydrazine
    540-73-8
    Dimethyl sulfate
    77-78-1*
    Dinitrocresol [4,6-Dinitro-o-cresol, and salts]
    534-52-1*
    2,4-Dinitrophenol
    51-28-5*
    2,4-Dinitrotoluene
    121-14-2*
    1,4-Dioxane [1,4-Diethyleneoxide]
    123-91-1*
    1,2-Diphenylhydrazine
    122-66-7*
    Disulfoton
    298-04-4
    Endothall
    145-73-3
    Endrin
    72-20-8††
    Epichlorohydrin
    106-89-8*
    1,2-Epoxybutane
    106-88-7*
    2-Ethoxyethanol
    110-80-5
    Ethyl acrylate
    140-88-5*
    Ethyl benzene
    100-41-4*
    Ethyl chloride [Chloroethane]
    75-00-3*

    18
    Ethylene dichloride [1,2-Dichloroethane]
    107-06-2*
    Ethylene glycol
    107-21-1*
    Ethylene imine [Aziridine]
    151-56-4*
    Ethylene oxide
    75-21-8*
    Ethylene thiourea
    96-45-7*
    Ethylidene dichloride [1,1-Dichloroethanel]
    75-34-3*
    Etridiazole
    2593-15-9
    FMC-67825
    95465-99-9
    Fluorine
    7782-41-4
    Folpet
    133-07-3
    Formaldehyde
    50-00-0*
    Furmecyclox
    60568-05-0
    Heptachlor
    76-44-8††
    Heptachlor epoxide
    1024-57-3**
    Hexachlorobenzene
    118-74-1††
    Hexachloro-1,3-butadiene [Hexachlorobutadiene]
    87-68-3††
    Hexachlorocyclopentadiene
    77-47-4*
    Hexachlorodibenzo-p-dioxin
    19408-74-3
    Hexachloroethane
    67-72-1*
    Hexamethylene-1,6-diisocyanate
    822-06-0*
    Hexamethylphosphoramide
    680-31-9*
    Hexane
    110-54-3*
    Hydrazine
    302-01-2*
    Hydrazine sulfate
    10034-93-2
    Hydrochloric acid
    7647-01-0*
    Hydrogen cyanide
    74-90-8
    Hydrogen fluoride [Hydrofluoric acid]
    7664-39-3*
    Hydrogen sulfide
    7783-06-4*
    Hydroquinone
    123-31-9*
    Indeno(1,2,3-cd)pyrene
    193-39-5**
    Isophorone
    78-59-1*
    Isophorone diisocyanate
    4098-71-9
    Lead
    7439-92-1
    Lindane-[Hexachlorocyclohexane-alpha](alpha)
    319-84-6**
    Lindane-[Hexachlorocyclohexane-beta](beta)
    319-85-7**
    Lindane-[Hexachlorocyclohexane-gamma](gamma)
    [Lindane all isomers]
    58-89-9††
    Lindane-[Hexachlorocyclohexane-mixed isomers]
    (mixed isomers)
    608-73-1
    Linuron
    330-55-2
    Malathion
    121-75-5
    Maleic anhydride
    108-31-6*

    19
    Manganese
    7439-96-5
    Mercury
    7439-97-6**
    Methanol
    67-56-1*
    Methoxychlor
    72-43-5††
    2-Methoxyethanol
    109-86-4
    2-Methoxyethanol acetate
    110-49-6
    Methyl bromide [Bromomethane]
    74-83-9*
    Methyl chloride [Chloromethane]
    74-87-3*
    Methyl chloroform [(1,1,1-Trichloroethane]
    71-55-6*
    Methyl ethyl ketone [2-Butanone]
    78-93-3*
    Methyl isobutyl ketone [Hexone]
    108-10-1*
    Methyl isocyanate
    624-83-9*
    Methyl methacrylate
    80-62-6*
    Methyl tert butyl ether
    1634-04-4*
    5-Methylchrysene
    3697-24-3
    4,4'-Methylene bis(2-chloroaniline)
    101-14-4*
    Methylenebis(phenylisocyanate) [Methylene
    diphenyl diisocyanate (MDI)]
    101-68-8
    4,4'-Methylenebis(N,N'-dimethyl)benzenamine)
    101-61-1
    Methylene chloride [Dichloromethane]
    75-09-2*
    4,4'-Methylenedianiline
    101-77-9*
    4,4'-Methylenedianiline dihydrochloride
    13552-44-8
    Methyl hydrazine
    60-34-4*
    Methyl iodide [Iodomethane]
    74-88-4*
    Methyl mercaptan
    74-93-1
    N-Methyl-N'-nitro-N-nitrosoguanidine
    70-25-7
    Metolachlor
    51218-45-2
    Michler's Ketone
    90-94-8
    Mirex
    2385-85-5**
    Monoethanolamine
    141-43-5
    Naphthalene
    91-20-3*
    beta-Naphthylamide
    91-59-8
    Nickel
    7440-02-0
    Nitric acid
    7697-37-2
    Nitrilotriacetic acid
    139-13-9
    Nitrobenzene
    98-95-3*
    4-Nitrobiphenyl
    92-93-3*
    5-Nitro-o-anisidine
    99-59-2
    2-Nitropropane
    79-46-9*
    4-Nitrophenol
    100-02-7*
    N-Nitroso-n-butyl-N-(3-carboxypropyl) amine
    38252-74-3
    N-Nitroso-n-butyl-N-(4-hydroxybutyl) amine
    3817-11-6

    20
    N-Nitrosodi-n-butylamine
    924-16-3
    N-Nitrosodiethanolamine
    1116-54-7
    N-Nitrosodiethylamine
    55-18-5
    N-Nitrosodimethylamine
    62-75-9*
    N-Nitrosodiphenylamine
    86-30-6
    N-Nitrosodi-n-propylamine
    621-64-7
    N-Nitroso-N-ethylurea
    759-73-9
    3-(N-Nitrosomethylamino) propionitrile
    60153-49-3
    N-Nitrosomethylethylamine
    10595-95-6
    N-Nitroso-N-methylurea
    684-93-5*
    N-Nitrosomethylvinylamine
    4549-40-0
    N-Nitrosomorpholine
    59-89-2*
    N-Nitrosonornicotine
    16543-55-8
    N-Nitrosopiperidine
    100-75-4
    N-Nitrosopyrrolidine
    930-55-2
    N-Nitrososarcosine
    13256-22-9
    Nitrofen
    11836-75-5
    Octachlorostyrene
    2908-74-4**
    PCDDs (Total polychlorinated dibenzodioxins)
    --
    PCDFs (Total polychlorinated dibenzofurans)
    --
    PAHs (Total polycyclic aromatic hydrocarbons)
    --
    Parathion
    56-38-2*
    Pentachlorobenzene
    608-93-5††
    Pentachloronitrobenzene [Quintobenzene]
    82-68-8*
    Pentachlorophenol
    87-86-5*
    Peracetic acid
    79-21-0
    Phenol
    108-95-2††
    p-Phenylenediamine
    106-50-3*
    Phenylhydrazine
    100-63-0
    Phorate
    298-02-2
    Phosgene
    75-44-5*
    Phosphine
    7803-51-2*
    Phosphorus
    7723-14-0*
    Phosphorus oxychloride
    10025-87-3
    Phosphorus pentachloride
    10026-13-8
    Photomirex
    39801-14-4**
    Phthalic anhydride
    85-44-9*
    Polybrominated biphenyls
    --
    Polychlorinated biphenyls [Aroclors]
    1336-36-3††
    Potassium bromate
    7758-01-2
    Propane sultone [1,3-Propane sultone]
    1120-71-4*
    beta-Propiolactone
    57-57-8*

    21
    Propionaldehyde
    123-38-6*
    Propoxur [Baygon]
    114-26-1*
    Propyleneimine [1,2-Propylenimine(2-Methyl
    aziridine)]
    75-55-8*
    Propylene oxide
    75-56-9*
    Pyrene
    129-00-0
    Quinoline
    92-22-5*
    Quinone
    106-51-4*
    Selenium
    7782-49-2
    Sodium borate
    1303-96-4
    Styrene 100-42-5
    Styrene
    100-42-5*
    Styrene oxide
    96-09-3*
    Sulfallate
    95-06-7
    Sulfuric acid
    7664-93-9
    Terbufos
    13071-79-9
    1,2,3,4-Tetrachlorobenzene
    634-66-2††
    1,2,4,5-Tetrachlorobenzene
    95-94-3††
    1,1,2,2-Tetrachloroethane
    79-34-35*
    Tetrachloroethylene
    [Perchloroethylene]
    127-18-4*
    2,3,7,8-Tetrachlorodibenzo-p-dioxin
    [2,3,7,8-TCDD]
    1746-01-6††
    4,4'-Thiodianiline
    139-65-1
    Thiophenol
    108-98-5
    Thiourea
    62-56-6
    Thorium dioxide
    1314-20-1
    Titanium tetrachloride
    7550-45-0*
    Toluene
    108-88-3††
    Toluene-2,4-diisocyanate [2,4-Toluene
    diisocyanate]
    584-84-9*
    Toluene-2,6-diisocyanate
    91-08-7
    o-Toluidine
    95-53-4*
    o-Toluidine hydrochloride
    636-21-5
    p-Toluidine
    106-49-0
    Toxaphene
    8001-35-2††
    1,2,4-Trichlorobenzene
    120-82-1*
    1,1,2-Trichloroethane
    79-00-5*
    Trichloroethylene
    79-01-6*
    2,4,5-Trichlorophenol
    95-95-4*
    2,4,6-Trichlorophenol
    88-06-2*
    Triethylamine
    121-44-8*
    Trifluralin
    1582-09-8*

    22
    Trimethylbenzene
    25551-13-7
    1,2,4-Trimethyl benzene
    95-63-6
    2,4,6-Trinitrotoluene
    118-96-7
    2,2,4-Trimethylpentane
    540-84-1*
    Tris(2,3-dibromopropyl) phosphate
    126-72-7
    Trypan blue
    72-57-1
    Urethane [Ethyl carbamate]
    51-79-6*
    Vinyl acetate
    108-05-4*
    Vinyl bromide
    593-60-2*
    Vinyl chloride
    75-01-4*
    Vinylidene chloride [1,1-Dichloroethylene]
    75-35-4*
    Xylenes (isomers and mixture)
    1330-20-7*
    o-Xylenes
    95-47-6*
    m-Xylenes
    108-38-3*
    p-Xylenes
    106-42-3*
    Antimony compounds*
    --
    Includes any unique chemical substance
    that contains antimony as part of that
    chemical's infrastructure
    Arsenic compounds*
    --
    Includes any unique chemical substance
    that contains arsenic as part of that
    chemical's infrastructure
    Beryllium compounds*
    --
    Includes any unique chemical substance
    that contains beryllium as part of that
    chemical's infrastructure
    Cadmium compounds*
    --
    Includes any unique chemical substance
    that contains cadmium as part of that
    chemical's infrastructure
    Chromium compounds*
    --
    Includes any unique chemical substance
    that contains chromium as part of that
    chemical's infrastructure
    Cobalt compounds*
    --

    23
    Includes any unique chemical substance
    that contains cobalt as part of that
    chemical's infrastructure
    Cyanide compounds*
    --
    x(pos) CN(neg) where X = H(pos) or any
    other group where a formal dissociation
    can be made. For example, KCN or Ca(CN)
    2
    Glycol ethers*
    --
    Includes any unique chemical substance
    that contains glycol as part of that
    chemical's infrastructure. Includes
    mono- and di- ethers of ethylene glycol,
    diethylene glycol, and triethylene glycol
    R(OCH
    2
    CH
    2
    )
    n
    -OR' where
    n = 1,2, or 3
    R = alkyl or aryl groups
    R' = R, H, or groups which, when
    removed, yield glycol ethers with
    the structure: R(OCH
    2
    CH
    2
    )
    n
    -OH.
    Polymers are excluded from the glycol
    category.
    Fine mineral fibers*
    --
    Includes mineral fiber emissions from
    facilities manufacturing or processing
    glass, rock, or slag fibers (or other
    mineral derived fibers) having the
    average diameter of 1 micrometer or
    less.
    Lead compounds*
    --
    Includes any unique chemical substance
    that contains lead as part of that
    chemical's infrastructure
    Manganese compounds*
    --
    Includes any unique chemical substance
    that contains manganese as part of that
    chemical's infrastructure

    24
    Mercury compounds*
    --
    Includes any unique chemical substance
    that contains mercury as part of that
    chemical's infrastructure
    Nickel compounds*
    --
    Includes any unique chemical substance
    that contains nickel as part of that
    chemical's infrastructure
    Polycyclic Organic Matter (POM)*
    --
    Includes organic compounds having more
    than one benzene ring and a boiling
    point equal to or greater than 100
    degrees Celsius (212 degrees Farenheit).
    Radionuclides (including radon)*
    --
    A type of atom which spontaneously
    undergoes radioactive decay.
    Selenium Compounds*
    --
    Includes any unique chemical substance
    that contains selenium as part of that
    chemical's infrastructure.
    * Indicates presence on HAP List.
    **Indicates presence on Great Waters List.
    ††Indicates presence on HAP and Great Waters Lists.
    Section 41 of the Environmental Protection Act (415 ILCS 5/41 (1994)) provides for the
    appeal of final Board orders within 35 days of the date of service of this order. The Rules of the
    Supreme Court of Illinois establish filing requirements. (See also 35 Ill. Adm. Code 101.246 "Motions
    for Reconsideration.")
    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 _____ day of ___________, 1996, by a vote of
    ______________.

    ___________________________________
    Dorothy M. Gunn, Clerk
    Illinois Pollution Control Board

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