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1 | AN ACT concerning transportation.
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2 | Be it enacted by the People of the State of Illinois,
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3 | represented in the General Assembly:
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4 | Section 5. The Permanent Noise Monitoring Act is amended by | ||||||||||||||||||||||||||
5 | changing Sections 5 and 15 as follows:
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6 | (620 ILCS 35/5) (from Ch. 15 1/2, par. 755)
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7 | Sec. 5. Definitions. As used in this Act:
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8 | (a) "Airport" means an airport, as defined in Section 6 of | ||||||||||||||||||||||||||
9 | the Illinois
Aeronautics Act, that has more than 500,000 | ||||||||||||||||||||||||||
10 | aircraft operations (take-offs
and landings) per year. | ||||||||||||||||||||||||||
11 | (a-1) "Airport sponsor" means any municipality, as defined | ||||||||||||||||||||||||||
12 | in Section 20 of the Illinois
Aeronautics Act, that can own and | ||||||||||||||||||||||||||
13 | operate an airport.
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14 | (b) "Permanent noise monitoring system" or "system" means a | ||||||||||||||||||||||||||
15 | system that
includes at least:
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16 | (1) automated noise monitors capable of recording | ||||||||||||||||||||||||||
17 | noise levels 24
hours per day 365 days per year; and
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18 | (2) computer equipment sufficient to process the data | ||||||||||||||||||||||||||
19 | from each noise
monitor so that permanent noise monitoring | ||||||||||||||||||||||||||
20 | reports in accordance with
Section 15 of this Act can be | ||||||||||||||||||||||||||
21 | generated.
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22 | (c) "Division" means the Division of Aeronautics of the | ||||||||||||||||||||||||||
23 | Illinois
Department of Transportation.
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1 | (d) (Blank). "Ldn" means day-night average sound level. | ||||||
2 | "Day-night average sound
level" has the meaning ascribed to it | ||||||
3 | in Section 150.7 of Part 150
of Title 14 of the Code of Federal | ||||||
4 | Regulations.
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5 | (e) "Daily community noise equivalent level" or "CNEL" | ||||||
6 | means the 24-hour average sound level,
in decibels, adjusted to | ||||||
7 | an equivalent level to account for the lower tolerance of | ||||||
8 | people to noise during evening and night time periods relative | ||||||
9 | to the daytime period. The daily community noise equivalent | ||||||
10 | level is calculated from the hourly noise levels by the | ||||||
11 | following: | ||||||
12 | CNEL = 10 log (1/24) [SIGMA antilog (HNLD/10) + 3 SIGMA antilog
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13 | (HNLE/10) + 10 SIGMA antilog (HNLN/10)] | ||||||
14 | Where: | ||||||
15 | (1) HNLD means the hourly noise levels for the period | ||||||
16 | of 7:00 a.m. through 6:59 p.m.; | ||||||
17 | (2) HNLE means the hourly noise levels for the period | ||||||
18 | 7:00 p.m. through 9:59 p.m.; | ||||||
19 | (3) HNLN means the hourly noise levels for the period | ||||||
20 | 10:00 p.m. through 6:59 a.m.; and | ||||||
21 | (4) SIGMA means summation. | ||||||
22 | (f) "Hourly noise level" means the average (on an energy | ||||||
23 | basis) noise level, in decibels, during a particular hour. | ||||||
24 | Hourly noise level is determined by subtracting 35.6 decibels |
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1 | (equal to 10 log 10 3600) from the noise exposure level measured | ||||||
2 | during the particular hour, integrating for those periods | ||||||
3 | during which the noise level exceeds a threshold noise level of | ||||||
4 | 55 decibels. At some microphone locations, sources of noise | ||||||
5 | other than aircraft may contribute to the CNEL. If the airport | ||||||
6 | sponsor demonstrates that the accuracy of the CNEL measurement | ||||||
7 | will remain within plus or minus 1.5 decibel, the Division may | ||||||
8 | grant a waiver to increase the threshold noise level. | ||||||
9 | (g) "Noise exposure level" means the level, in decibels, of | ||||||
10 | the time-integrated A-weighted squared sound pressure for a | ||||||
11 | stated time interval or event, based on the reference pressure | ||||||
12 | of 20 micronewtons per square meter and reference duration of | ||||||
13 | one second. | ||||||
14 | (h) "Noise level" means the measure in decibels of an | ||||||
15 | A-weighted sound pressure level as measured using the slow | ||||||
16 | dynamic characteristic for sound level meters specified in | ||||||
17 | American National Standard Specification for Sound Level | ||||||
18 | Meters (ANSI S1.4-1983 as revised by ANSI S1.4A-1985), which is | ||||||
19 | hereby incorporated by reference. The A-weighting | ||||||
20 | characteristic modifies the frequency response of the | ||||||
21 | measuring instrument to account approximately for the | ||||||
22 | frequency characteristics of the human ear. The reference | ||||||
23 | pressure is 20 micronewtons/square meter (2 x 10 -4 microbar). | ||||||
24 | (i) "Sound pressure level" means a measurement, in | ||||||
25 | decibels, of a sound equal to 20 times the logarithm to the | ||||||
26 | base 10 of the ratio of the pressure of that sound to the |
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1 | reference pressure 20 micronewtons/square meter (2 x 10 -4 | ||||||
2 | microbar). | ||||||
3 | (Source: P.A. 96-37, eff. 7-13-09.)
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4 | (620 ILCS 35/15) (from Ch. 15 1/2, par. 765)
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5 | Sec. 15. Permanent noise monitoring reports. Beginning in | ||||||
6 | 1993 and through 2008, the
Division shall, on June 30th and | ||||||
7 | December 31st of each
year, prepare a permanent noise | ||||||
8 | monitoring report and make the
report available to the public. | ||||||
9 | Beginning in 2009, the
airport sponsor shall, on June 30th and | ||||||
10 | December 31st of each
year, prepare a permanent noise | ||||||
11 | monitoring report and make the
report available to the public. | ||||||
12 | Copies of the report shall be
submitted to: the Office of the | ||||||
13 | Governor; the Office of the President of
the Senate; the Office | ||||||
14 | of the Senate Minority Leader; the Office of the
Speaker of the | ||||||
15 | House; the Office of the House Minority Leader; the United
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16 | States Environmental Protection Agency, Region V; and the | ||||||
17 | Illinois
Environmental Protection Agency. Beginning in 2009, a | ||||||
18 | copy of the report shall also be submitted to the division. The | ||||||
19 | permanent noise monitoring report
shall contain all of the | ||||||
20 | following:
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21 | (a) Copies of the actual data collected by each permanent | ||||||
22 | noise monitor
in the system.
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23 | (b) A summary of the data collected by each permanent noise | ||||||
24 | monitor in
the system, showing the data organized by:
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25 | (1) day of the week;
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1 | (2) time of day;
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2 | (3) week of the year;
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3 | (4) type of aircraft; and
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4 | (5) the single highest noise event recorded at each | ||||||
5 | monitor.
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6 | (c) Noise contour maps showing the 65 CNEL Ldn , 70 CNEL Ldn | ||||||
7 | and 75 CNEL Ldn zones
around the airport.
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8 | (d) Noise contour maps showing the 65 decibel (dBA), 70 | ||||||
9 | dBA, and 75
dBA zones around the airport for:
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10 | (1) 7:00 a.m. through 6:59 to 10:00 p.m.;
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11 | (1.5) 7:00 p.m. through 9:59 p.m.;
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12 | (2) 10:00 p.m. through 6:59 to 7:00 a.m.; and
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13 | (3) types of aircraft.
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14 | (e) The noise contour maps produced under subsections (c) | ||||||
15 | and (d)
shall also indicate:
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16 | (1) residential areas (single and multi-family);
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17 | (2) schools;
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18 | (3) hospitals and nursing homes;
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19 | (4) recreational areas, including but not limited to | ||||||
20 | parks and
forest preserves;
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21 | (5) commercial areas;
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22 | (6) industrial areas;
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23 | (7) the boundary of the airport;
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24 | (8) the number of residences (single and multi-family) | ||||||
25 | within each
contour;
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26 | (9) the number of residents within each contour;
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1 | (10) the number of schools within each contour; and
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2 | (11) the number of school students within each contour.
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3 | (f) Through 2008, a certification by the Division that the | ||||||
4 | system was in proper
working order during the period or, if it | ||||||
5 | was not, a specific description
of any and all problems with | ||||||
6 | the System during the period. | ||||||
7 | (g) Beginning in 2009, a certification by the airport | ||||||
8 | sponsor that the system was in proper
working order during the | ||||||
9 | period or, if it was not, a specific description
of any and all | ||||||
10 | problems with the system during the period.
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11 | (Source: P.A. 96-37, eff. 7-13-09.)
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