7Zc4
    &4’)
    STATE
    OF
    ILLINOIS
    POLLUTION
    CONTROL
    BOARD
    EKJYFE
    JAMES
    R.
    THOMPSON
    CENTER
    100
    W.
    RANDOLPH
    ST,
    SUITE
    11-500
    SEP
    092009
    CHICAGO,
    IL.
    60601
    STATE
    OF
    ILLINOIS
    Pollution
    Control
    Board
    PETER
    ARENDOVICH,
    Complainant,
    v.
    )
    PCB29009-102
    ILLINOIS
    STATE
    TOLL
    HIGHWAY
    AUTHORITY,
    Respondent.
    NOTICE
    OF’
    MOTION
    To:
    Robert
    T.
    Lane
    AAG
    Illinois
    State
    Toll
    Highway
    Authority
    2700
    Ogden
    Ave.
    Downers
    Grove,
    JL.60515
    PLEASE
    TAKE
    NOTICE
    that
    on
    September
    9,
    2009
    a
    motion
    for
    Leave
    to
    File
    an
    Amended
    Complaint
    was
    filed
    with
    the
    Clerk
    of
    the
    Illinois
    Pollution
    Control
    Board,
    James
    R.
    Thompson
    Center,
    100
    W.
    Randolph
    Street,
    Suite
    11-500,
    Chicago,
    IL
    60601
    ,
    a
    copy
    of
    which
    is
    attached
    hereto
    and
    hereby
    served
    upon
    you.
    CERtIfICATE
    OF
    SERVICE
    I,
    Peter
    Arendovich,
    deposes
    and
    states
    that
    a
    copy
    of
    the
    foregoing
    was
    served
    upon
    the
    above
    named
    by
    first
    class
    mail
    on
    the
    9th
    day
    of
    September,
    2009.
    if
    1
    iPeter
    Arendovich
    /
    1388
    Gordon
    Lane
    Lemont,
    IL.60439
    630-257-8753

    STATE
    OF
    ILLINOIS
    POLLUTION
    CONTROL
    BOARD
    JAMES
    R.
    THOMPSON
    CENTER
    E
    C
    E
    100
    W.
    RANDOLPH
    ST,
    SUITE
    11-500
    CLEFjcs
    0YFP
    CHICAGO,
    IL.
    60601
    SEP
    092009
    STATE
    OF
    1LUNOS
    PETER
    ARENDOVICH,
    )
    Pollution
    Control
    Board
    Complainant,
    V.
    )
    PCB29009-102
    ILLINOIS
    STATE
    TOLL
    HIGHWAY
    AUTHORITY,
    Respondent.
    MOTION
    FOR
    THE
    FILING
    OF
    THE
    COMPLAINANT’S
    FIRST
    AMENDED
    COMPLAINT
    NOW
    COMES
    the
    Complainant,
    Peter
    Arendovich
    and
    moves
    this
    Board
    for
    an
    order
    granting
    the
    filing
    of
    the
    Complainant’s
    First
    Amended
    Complaint.
    In
    support
    of
    this
    motion,
    the
    Complainant
    states
    as
    follows:
    1.
    The
    Respondent
    has
    filed
    a
    motion
    on
    July
    15,
    2009,
    to
    strike
    and
    dismiss
    the
    original
    Complaint
    as
    frivolous.
    2.
    The
    Complainant
    has
    corrected
    the
    legal
    deficiencies
    of
    the
    Complaint
    in
    answer
    to
    the
    Respondent’s
    Motion
    to
    Strike
    and
    Dismiss
    3.
    A
    copy
    of
    the
    First
    Amended
    Complaint
    is
    attached
    to
    this
    motion
    and
    made
    a
    part
    thereof.
    WHEREFORE,
    the
    Complainant
    prays
    this
    board
    to
    grant
    an
    order
    allowing
    the
    filing
    of
    the
    First
    Amended
    Complaint.
    Re,speçtfliy
    submittFd,
    /eter
    Arendovich
    1388
    Gordon
    Lane
    Lemont,
    IL.60439
    630-257-8753

    STATE
    OF’
    ILLINOIS
    POLLUTION
    CONTROL
    BOARD
    JAMES
    R.
    THOMPSON
    CENTER
    100W.
    RANDOLPH
    ST,
    SUITE
    11-500
    CHICAGO,
    IL.
    60601
    CLERicS
    OFFICE
    SEP
    092009
    PETER
    ARENDOVICH,
    )
    STATE
    OF
    ILLINOIS
    Pollution
    Control
    Board
    Complainant,
    v.
    )
    PC829009-102
    ILLINOIS
    STATE
    TOLL
    HIGHWAY
    AUTHORITY,
    Respondent.
    FIRST
    AMENDED
    COMPLAINT
    NOW
    COMES
    the
    Complainant,
    Peter
    Arendovich,
    pursuant
    to
    415
    ILCS
    5/31(d)
    (1)
    and
    35
    Iii.
    Admn.
    Code
    900.102
    et
    seq.
    and
    complains
    of
    the
    Respondent,
    the
    Illinois
    State
    Toll
    Highway
    Authority
    as
    follows:
    1.
    The
    Illinois
    State
    Toll
    Highway
    Authority,
    (ISTHA),
    has
    violated
    23
    CFR
    Part
    772.13(c)
    and
    23
    USC
    109(h)
    and
    35
    Iii.
    Adm.
    Code,
    Subtitle
    H,
    Chapter
    I,
    Section
    900.102
    by
    failing
    to
    provide
    the
    required
    noise
    abatement
    policies
    and
    procedures
    required
    under
    the
    provisions
    of
    both
    federal
    and
    state
    law.
    2.
    ISTHA
    co-operated
    with
    the
    Federal
    Highway
    Administration
    in
    the
    planning
    and
    construction
    of
    1-355
    through
    Cook
    and
    Will
    Counties.
    3.
    A
    required
    Environmental
    Impact
    Statement,
    (EIS),
    was
    prepared
    by
    the
    Respondent
    and
    included
    the
    required
    noise
    abatement
    studies.
    The
    EIS
    indicates
    the
    location
    of
    the
    Complainant’s
    residence
    as
    section
    25
    shown
    on
    the
    EIS
    exhibit

    2-16.
    A
    Copy
    of
    the
    exhibit
    is
    attached
    hereto
    as
    Complainant’s
    ExA.
    4.
    Table
    4-15
    of
    the
    EIS
    details
    the
    Results
    of
    the
    Noise
    Abatement
    Analysis
    and
    section
    25,
    including
    the
    Complainant’s
    residence
    as
    well
    as
    23
    other
    residences,
    states
    that
    a
    noise
    reduction
    barrier
    is
    likely
    to
    be
    implemented
    and
    that
    the
    potential
    noise
    red
    uction
    is
    to
    be
    9
    dB(A).
    (A
    copy
    is
    attached
    hereto
    as
    Exhibit
    B).
    The
    EIS
    establishes
    that
    heavy
    trucks
    generate
    86dBA
    and
    the
    reduction
    of
    9
    dBA
    fails
    to
    comply
    with
    state
    and
    federal
    noise
    levels
    as
    is
    shown
    on
    charts
    74
    through
    79
    of
    Exhibit
    C.
    5.
    The
    Complainant
    has
    consistently
    complained
    to
    ISTHA
    regarding
    the
    excessive
    noise
    levels
    of
    the
    constructed
    Toliway.
    ISHTA
    has
    failed
    to
    properly
    address
    the
    Complainants
    concerns.
    The
    Complainant
    hired
    the
    acoustical
    engineering
    firm,
    S&V
    Solutions
    to
    conduct
    detailed
    scientific
    studies
    in
    accordance
    with
    the
    measurement
    procedures
    set
    forth
    under
    the
    provisions
    of
    35
    Ill.
    Admn.
    Code
    Section
    900.103.
    A
    detailed
    scientific
    study
    of
    the
    noise
    levels
    experienced
    at
    the
    Complainant’s
    residence
    has
    been
    conducted
    and
    a
    copy
    of
    the
    detailed
    analysis
    and
    report
    is
    attached
    hereto
    as
    Exhibit
    C.
    The
    study’s
    conclusions
    states
    as
    follows:
    “The
    data
    shows
    that
    from
    Tuesdays
    through
    Fridays
    the
    noise
    generated
    by
    the
    highway
    is
    above
    the
    noise
    level
    indicated
    on
    Title
    23
    Chart
    (A)
    shows
    heavy
    trucks
    generate
    86
    db
    at
    a
    distance
    of
    50
    feet
    from
    the
    source.
    Your
    property
    is
    about
    150
    feet
    from
    the
    source
    and
    the
    bedroom
    wall
    is
    350
    feet
    from
    the
    source.
    Taking
    into
    account
    Chart
    (A),
    the
    generated
    noise
    by
    heavy
    trucks
    at
    60
    MPH
    is
    about
    86
    dB.
    Based
    on
    the
    2

    acoustic
    distance
    law,
    where
    the
    amount
    of
    decibels
    decrease
    by
    5
    every
    time
    distance
    is
    doubled(inverse
    square
    law),
    it
    is
    very
    unlikely
    the
    noise
    will
    dissipate
    to
    legal
    levels
    150
    feet
    away,
    nor
    at
    350
    ft.
    by
    your
    bedroom
    where
    the
    readings
    were
    taken.
    This
    is
    shown
    on
    charts
    from
    #74
    through
    #89.
    On
    charts
    #74
    through
    #79
    the
    high
    point
    which
    is
    above
    65
    db
    correlates
    with
    heavy
    truck
    noise
    decibels
    (db)
    and
    heavy
    truck
    traveling
    frequencies,
    passing
    at
    a
    given
    point.”
    6.
    The
    noise
    levels
    recorded
    in
    the
    detailed
    scientific
    study
    are
    in
    excess
    of
    the
    required
    maximums
    established
    by
    federal
    and
    state
    regulations.
    FHWA
    regulations
    contained
    in
    IDOT’s
    Traffic
    Noise
    Assessment
    Manual
    at
    2-2
    indicate
    that
    the
    maximum
    dBA
    for
    residential
    areas
    is
    67
    dBA.
    A
    copy
    of
    IDOT’s
    FHWA
    NOISE
    ABATEMENT
    CRITERIA
    is
    attached
    hereto
    as
    Exhibit
    D.
    7.
    All
    of
    the
    graphs
    included
    in
    the
    attached
    study
    show
    that
    the
    noise
    levels
    generated
    by
    the
    Toliway
    are
    consistently
    above
    the
    maximums
    established
    under
    state
    and
    federal
    regulations.
    WHEREFORE
    the
    Complainant
    prays
    this
    Board
    to
    find
    ISTHA
    in
    violation
    of
    35
    Ill.
    Adm.
    Code,
    Subtitle
    H,
    Chapter
    I,
    Section
    900.102
    and
    to
    order
    the
    Respondent
    to
    construct
    proper
    noise
    abatement
    barriers
    as
    originally
    proposed
    in
    the
    Environmental
    Impact
    Study
    and
    in
    accordance
    with
    federal
    and
    state
    laws.
    Res
    ec
    ully
    subniited,
    ,/Peter
    Arendovich
    1388
    Gordon
    Lane
    Lemont,
    IL.60439
    630—257-8753
    3

    V
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    Table
    4-15
    Results
    of
    Noise
    Abatement
    Analysis
    Barrier
    Bartier
    .Reductton
    .
    Likely
    If
    Height
    Length
    Cost
    .
    Potential
    .
    To
    Be
    Rea
    In
    Feet
    In
    Feet
    t$25/Sq
    Fti
    dB(A
    .
    Implimented
    Wi
    15
    1200
    15
    1000
    15
    6800
    25
    7680
    25
    8800
    25
    1600
    25
    1000
    $450,000
    $375,000
    $2,550,000
    $4,800,000
    $5,500,000
    $1,000,000
    $625,000
    15
    1500
    15
    1500
    25
    4700
    $562,500
    $562,500
    $2,937,500
    1(R)
    20
    2(R)
    18
    5CR)
    16
    11(R)
    13
    14A(P)
    70
    15(R)
    1
    15A(R)
    8
    MIDDLE
    SECTION
    15B(R)
    9
    16(R)
    16
    16A(R)
    22
    17(R)
    12
    17A(R)
    4
    18(R)
    17
    19(R)
    17
    21A(R)
    2
    21B.()
    17
    22
    28(R)
    29(R)
    3
    30(R)
    2
    31(R)
    3
    32(R)
    5
    NORTHERN
    SECTION
    33(R)
    3
    33A
    (P)
    88
    33B
    CR)
    1
    34(R)
    6
    35CR)
    4
    42(R)
    3
    43(R)
    2
    44(R)
    2
    45(R)
    20
    46(R)
    25
    St1JctlAEes
    Rthtor
    .:
    .
    resented
    SOUTHERN
    SECTION
    Notes:
    Receptors
    16A
    and
    17
    share
    a
    common
    noise
    abatement
    barrier.
    25
    2200
    25
    10200
    25
    10200
    25
    5400
    25
    10200
    25
    3700
    25
    2200
    25
    2600
    15
    1700
    15
    1300
    15
    2300
    $1,375,000
    $6,375,000
    $6,375,000
    $3,375,000
    $6,375,000
    $1,400,000
    $1,375,000
    $1,625,000
    $637,500
    $487,500
    $862,500
    7
    6
    2
    4-6
    7’8
    7-8
    2-3
    2-3
    4
    13
    2
    2
    8-9
    2
    9
    9
    9
    2
    2
    2
    4-6
    4
    2
    4-6
    4-6
    6-8
    6-8
    4-6
    5
    6-7
    YES
    YES
    NO
    NO
    NO
    NO
    YES
    NO
    NO
    NO
    NO
    NO
    NO
    NO
    NO
    NO
    YES
    NO
    NO
    NO
    NO
    NO
    NO
    NO
    NO
    NO
    NO
    ND
    NO
    NO
    YES
    YES
    2
    2
    1
    2
    2
    2
    2
    1,2
    1,2
    1,2
    1,2
    1,2
    1,2
    1,2
    1,2
    1
    2
    1,2
    1,2
    1
    1
    1
    15
    3500
    25
    3000
    25
    11200
    15
    3400
    15
    3400
    25
    1400
    25
    2600
    25
    2200
    25
    1400
    15
    5000
    $1,312,500
    $1,875,000
    $7,000,000
    $1,275,000
    $1,275,000
    $875,000
    $1,625,000
    $1,375,000
    $875,000
    $1,875,000
    P)
    -
    Represents
    proposed
    residential
    developments
    R)
    -
    Represents
    existing
    residence
    *
    The
    cost
    includes
    preliminary
    anaiyss
    design,
    final
    design
    and
    related
    construction
    costs.
    -
    Not
    economically
    reasonable
    or
    feasible
    based
    on
    cost
    compared
    to
    benefit.
    2
    -
    Does
    not
    provide
    substantial
    noise
    abatement.
    467
    H1I7’
    B

    —5
    ‘[iltlOflS
    27707
    Moose
    Range
    Rd.
    Sycamore,
    IL
    60178
    consultants
    in
    applied
    acoustics
    815
    /
    899-2021
    and
    vibration
    technologies
    815
    /899-2115
    FAX
    Date:
    June
    13,
    2009
    To:
    Peter
    Arendovich,
    Lemont
    Resident
    From:
    David
    Larson,
    Acoustical
    Consultant
    Ref:
    1-355
    Traffic
    Noise
    Level
    Dear
    Peter:
    I
    am
    writing
    to
    share
    the
    results
    of
    the
    noise
    monitoring
    I
    did
    it
    your
    residence
    for
    traffic
    noise
    coming
    from
    1-355.
    The
    equipment
    used
    is
    listed
    below:
    1.
    Bruel
    &
    Kjaer
    type
    2144
    acoustics
    analyzer
    and
    data
    collector.
    2.
    Bruel
    &
    Kjaer
    type
    2639
    microphone
    preamplifier.
    3.
    Bruel
    &
    Kjaer
    type
    4155
    condenser
    microphone.
    4.
    Bruel
    &
    Kjaer
    type
    4231
    portable
    acoustic
    calibrator.
    This
    data
    analyzer/collector
    was
    placed
    on
    your
    premises
    with
    a
    microphone
    located
    in
    two
    positions:
    Position
    1:
    The
    microphone
    was
    placed
    at
    a
    distance
    of
    340
    ft
    from
    the
    bridge
    to
    your
    home’s
    balcony
    tripod
    that
    held
    the
    mic
    5
    ft
    above
    the
    ground.
    The
    total
    height
    from
    the
    ground
    to
    the
    microphone
    was
    14
    feet.
    Wind
    speed
    and
    direction
    was
    taken
    from
    weather
    reports.
    Position
    2
    was
    taken
    at
    a
    distance
    of
    120
    ft
    from
    the
    bridge
    onto
    your
    lot.
    The
    microphone
    was
    placed
    on
    a
    tripod
    5
    ft
    from
    the
    ground.
    Wind
    speed
    and
    direction
    was
    taken
    from
    weather
    reports.
    The
    calibration
    was
    based
    on
    the
    standard
    portable
    B&K
    calibrator
    which
    was
    applied
    to
    the
    microphone
    at
    the
    beginning
    and
    end
    of
    the
    measurement
    session.
    Data
    was
    taken
    at
    each
    position
    over
    several
    different
    periods
    of
    time
    during
    the
    day
    and
    night.
    The
    analyzer
    was
    set
    up
    to
    measure
    A-weighted
    sound
    level
    in
    intervals
    of
    one
    measurement
    every
    second
    or
    one
    measurement
    every
    10
    seconds.
    The
    data
    was
    recorded
    on
    a
    floppy
    disk.
    This
    data
    from
    the
    disk
    was
    then
    analyzed
    and
    converted
    to
    an
    MS-Excel
    spreadsheet
    chart
    to
    be
    studied
    and
    to
    be
    compared
    to
    the
    value
    based
    on
    which
    the
    EIS
    was
    approved.
    The
    following
    data
    was
    collected
    on
    a
    test
    made
    for
    4
    hours
    in
    length
    with
    10
    seconds
    intervals.
    Notice
    the
    noise
    generated
    in
    decibels
    in
    weighed
    scale
    A
    (dBA)
    at
    different
    times:
    Chart
    from
    13.55
    pm
    to
    18.31
    pm
    Chart
    from
    10.00
    am
    to
    14.36
    am
    Chart
    from
    15.00
    pm
    to
    19.30
    pm
    Chart
    from
    6
    .00
    am
    to
    10.36
    am
    Chart
    from
    13.30
    pm
    to
    18.06
    pm
    81
    June
    7
    2008
    Saturday
    83
    June
    10
    2008
    Tuesday
    85
    June
    10
    2008
    Tuesday
    87
    June11
    2008
    Wednesday
    88
    June
    11
    2008
    Wednesday
    ,,
    1
    H1IT
    C

    __SJ
    t
    tions
    Chart
    90
    June
    12
    2008
    Thursday
    from
    13.30
    pm
    to
    19.06
    pm
    Chart
    89
    June
    12
    2008
    Thursday
    from
    6.00
    am
    to
    19.38
    am
    You
    can
    see
    a
    fluctuation
    in
    the
    noise
    at
    different
    times
    during
    rush
    hours
    (in
    the
    morning
    from
    5.30
    am
    to
    about
    8.00
    am,
    and
    again
    in
    the
    afternoon
    from
    about
    3.00
    pm
    to
    about
    7.00
    pm).
    Data
    was
    also
    collected
    during
    a
    test
    made
    for
    27
    minutes
    at
    an
    interval
    length
    of
    1
    second.
    Notice
    the
    noise
    generated
    in
    decibels
    weighed
    scale
    a
    (dBA)
    at
    different
    times
    Chart
    74
    June
    5
    2008
    Thursday
    from
    7.00
    am
    to
    7.27
    am
    Chart
    75
    June
    5
    2008
    Thursday
    from
    6.00
    pm
    to
    6.27
    pm
    Chart
    77
    June
    6
    2008
    Friday
    from
    6.00
    am
    to
    6.27
    am
    Chart
    78
    June
    6
    2008
    Friday
    from
    6.30
    am
    to
    6.57
    am
    Chart
    79
    June
    6
    2008
    Friday
    from
    7.20
    am
    to
    7.47
    am
    In
    this
    set
    of
    charts
    it
    shows
    that
    even
    on
    Fridays
    the
    noise
    level
    measured
    on
    the
    A
    weighed
    scale
    is
    above
    the
    level
    indicated
    in
    the
    Title
    23.
    Chart
    (A)
    Is
    a
    chart
    provided
    by
    the
    FHA,
    This
    chart
    shows
    different
    size
    vehicles
    traveling
    at
    different
    speed
    and
    the
    noise
    level
    generated
    in
    decibel
    weighed
    scale
    A
    :
    Chart
    A
    2

    Conclusions
    1.
    The
    data
    shows
    that
    from
    Tuesdays
    through
    Fridays
    the
    noise
    generated
    by
    the
    highway
    is
    above
    the
    noise
    level
    indicated
    on
    Title
    23.
    2.
    Chart
    (A)
    shows
    heavy
    trucks
    generate
    86
    db
    at
    a
    distance
    of
    50
    ft
    from
    the
    source.
    3.
    Your
    property
    is
    about
    150
    ft.
    from
    the
    source
    and
    the
    bedroom
    wall
    is
    350
    ft
    from
    the
    source.
    4.
    Taking
    into
    account
    Chart
    (A),
    the
    generated
    noise
    by
    heavy
    trucks
    at
    60
    mph
    is
    about
    86
    dB.
    Based
    on
    the
    acoustic
    distance
    law,
    where
    the
    amount
    of
    decibels
    decrease
    by
    5
    every
    time
    the
    distance
    is
    doubled
    (the
    inverse
    square
    law),
    it
    is
    very
    unlikely
    the
    noise
    will
    dissipate
    to
    legal
    levels
    150
    ft.
    away,
    nor
    at
    350
    ft.
    by
    your
    bedroom
    where
    the
    reading
    were
    taken.
    This
    is
    shown
    on
    charts
    from
    #
    74
    though
    #89.
    5.
    On
    charts
    #
    74
    through
    #79
    the
    high
    point
    which
    is
    above
    65
    db
    correlates
    with
    heavy
    trucks
    noise
    decibels
    (db)
    and
    heavy
    truck
    traveling
    frequencies,
    passing
    by
    at
    a
    given
    point.
    Best
    Regards,
    David
    A.
    Larson,
    S&V
    Solutions,
    Inc.
    815-899-2021
    office,
    815-899-2115
    FAX,
    815-762-5333
    cellular
    email:
    techinfo(svso1utions.
    corn
    Appendix
    1:
    inverse
    square
    law
    When
    sound
    propagates
    freely
    in
    space
    the
    level
    of
    sound
    decays
    with
    one
    over
    the
    square
    of
    diatance.
    This
    is
    commonly
    called
    the
    inverse
    square
    law
    and
    can
    be
    written
    as
    follows:
    L
    2
    =L
    1
    —2OxLOG(X
    2
    /X
    1
    )
    Where
    L
    2
    is
    the
    level
    of
    sound
    a
    distance
    X
    2
    ,
    and
    L
    1
    is
    the
    level
    of
    sound
    at
    distance
    X
    1
    .
    Please
    remember
    this
    law
    applies
    on
    to
    purely
    free
    field
    radiation.
    Across
    a
    grassy
    field,
    or
    a
    paved
    parking
    lot,
    or
    down
    a
    gravel
    road
    (as
    examples)
    one
    will
    see
    less
    decay
    with
    distance.
    3

    Appendix
    2:
    multiple
    sources
    If
    two
    noise
    sources
    of
    equal
    strength
    and
    uncorrelated
    with
    each
    other
    (such
    at
    two
    trucks
    on
    a
    highway)
    are
    added,
    such
    as
    they
    would
    if
    passing
    the
    same
    point
    at
    about
    the
    same
    time,
    then
    the
    total
    level
    would
    be
    3
    dB
    higher
    than
    one
    truck:
    Lets
    us
    say
    that
    a
    fleet
    of
    trucks
    are
    all
    rated
    to
    produce
    80
    dBA
    total
    noise
    at
    100
    feet.
    Two
    trucks
    passing
    at
    100
    feet
    =
    83
    cIBA
    Four
    trucks
    passing
    at
    100
    feet
    86
    cIBA
    Eight
    trucks
    passing
    at
    100
    feet
    89
    cIBA
    4

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    [19:06:00
    f_I.

    of
    traffic
    noise
    impacts,
    and
    the
    need
    to
    offer
    mitigation
    where
    reasonable
    and
    feasible
    criteria
    have
    been
    achieved.
    I
    2.3
    Traffic
    Noise
    Impacts
    and
    Applicability
    2.3.1
    FHWA
    Regulations
    Five
    separate
    Noise
    Abatement
    Criteria
    (NAC),
    based
    on
    land
    use,
    are
    used
    by
    FHWA
    to
    assess
    potential
    noise
    impacts
    as
    defined
    by
    23
    CFR
    772.
    The
    FHWA
    considered
    several
    approaches
    to
    define
    impact
    levels,
    but
    generally
    based
    the
    criteria
    on
    noise
    levels
    associàtéd
    with
    the
    interference
    of
    speech
    communication.
    The
    NAC
    are
    therefore
    a
    balance
    of
    what
    is
    desirable
    and
    what
    is
    generally
    achievable.2
    A
    traffic
    noise
    impact
    occurs
    when
    noise
    levels
    approach,
    meet
    or
    exceed
    the
    NAC
    criteria
    listed
    in
    the
    following
    table
    or
    when
    the
    predicted
    noise
    levels
    are
    substantially
    higher
    than
    the
    existing
    noise
    level.
    TABLE
    2-1
    FHWA
    NOISE
    ABA
    TEMENT
    CRiTERIA
    -
    HOURLY
    WEIGHTED
    SOUND
    LEVEL
    Activity
    L(h),
    Category
    dBA
    Description
    of
    Activity
    Category
    Lands
    on
    which
    serenity
    and
    quiet
    are
    of
    extraordinary
    A
    57
    significance
    and
    serve
    an
    important
    public
    need
    and
    where
    (Exterior)
    the
    preservatioh
    of
    those
    qualitie
    is
    esentiaI
    if
    the
    area
    is
    to
    continue
    to
    serve
    its
    intended
    purpose.
    67
    Residences,
    picnic
    areas,
    recreation
    areas,
    playgrounds,
    B
    ‘Exterior’
    active
    sports
    areas,
    parks,
    motels,
    hotels,
    schools,
    churches,
    libraries,
    and
    hospitals.
    72
    Developed
    lands,
    properties,
    or
    activities
    not
    included
    in
    (Exterior)
    Categories
    A
    or
    B
    above
    D
    -
    -
    -
    Undeveloped
    lands.
    E
    52
    Residences,
    motels,
    hotels,
    public
    meeting
    rooms,
    schools,
    (Interior)
    churches,
    libraries,
    hospitals
    and
    auditoriums.
    FHWA
    has
    deferred
    to
    the
    State
    agencies
    to
    define
    the
    noise
    level
    that
    “approaches”
    the
    NAC
    and
    to
    define
    a
    substantial
    increase
    in
    traffic
    noise
    levels.
    It
    should
    be
    noted
    that
    the
    NAG
    are
    not
    used
    as
    goals
    for
    noise
    attenuation
    design
    criteria
    or
    design
    targets.
    Instead,
    the
    NAC
    are
    noise
    impact
    thresholds
    for
    considering
    abatement
    when
    they
    are
    approached,
    met,
    or
    exceeded.
    Noise
    abatement
    measures
    are
    required
    to
    be
    considered
    as
    part
    Of
    the
    project
    if
    impacts
    are
    identified.
    IDOT
    Highway
    Traffic
    Noise
    Assessment
    Manual
    Rev.
    10/1/07
    9
    u8rf
    0

    projects
    are
    defined
    as
    follows:
    Type
    1
    projects.
    A
    proposed
    Federal
    or
    Federal-aid
    highway
    project
    for
    the
    construction
    of
    a
    highway
    on
    new
    location
    or
    the
    physical
    alteration
    of
    an
    existing
    highway
    which
    significantly
    changes
    either
    the
    horizontal
    or
    vertical
    alignment
    or
    increases
    the
    number
    of
    through-traffic
    lanes.
    Noise
    abatement
    is
    fináncéd
    with
    funds
    äppropriatêd
    for
    the
    ptOØbed
    prOject.
    Type
    II
    or
    Retrofit
    projects.
    A
    proposed
    noise
    abatement
    project
    on
    an
    existing
    fully
    controIledaccess
    State
    highway
    or
    Interstate
    in
    an
    urban
    area.
    2.3.2
    IDOT
    Noise
    Policy
    The
    IDOT
    Noise
    Policy
    establishes
    the
    traffic
    noise
    analyses
    requirements
    for
    all
    Type
    I
    or
    Type
    Il
    projects
    whether
    they
    are
    federally
    funded
    or
    State-only
    funded,
    which
    includes
    cost-sharing
    projects
    with
    local
    funds.
    The
    traffic
    noise
    impact
    determination
    is
    based
    on
    the
    FHWA
    NAC
    as
    set
    forth
    in
    lOOT’s
    policy
    found
    in
    Chapter
    28-6.05(c)
    (Analysis
    and
    Reporting)
    of
    the
    BDE
    Manual.
    lOOT
    has
    established
    the
    following
    criteria
    to
    define
    the
    Occurrence
    Of
    a
    traffic
    noise
    impact.
    Design
    year
    (typically
    20
    years
    into
    the
    future)
    traffic
    noise
    levels
    are
    predicted
    to
    approach,
    meet,
    or
    exceed
    the
    NAG,
    with
    approach
    defined
    as
    I
    dBA
    less
    than
    NAC
    Or,
    Design
    year
    (typically
    20
    years
    into
    the
    future)
    traffic
    noise
    levels
    are
    predicted
    to
    substantially
    increase
    (greater
    than
    14
    dBA)
    over
    existing
    traffic-
    generated
    noise
    levels
    Based
    on
    the
    approach
    definition
    determined
    by
    IDOT,
    Table
    2-2
    provides
    the
    noise
    levels
    at
    which
    a
    traffic
    noise
    impact
    would
    occur
    and
    would
    require
    consideration
    of
    traffic
    noise
    abatement
    for
    the
    design
    year.
    TABLE
    2-2
    lOOT
    TRAFFIC
    NOISE
    LEVELS
    WARRANTING
    ABATEMENT
    EVALUATiON
    Activity
    Category
    L(h),
    dBA
    A
    56
    (Exterior)
    B
    66
    (Exterior)
    C
    71
    (Exterior)
    E0
    51
    (Interior)
    1DOT
    Highway
    Traffic
    Noise
    Assessment
    Manual
    Rev.
    10/1/07

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