2020 Illinois Compiled Statutes
Chapter 620 - AIR TRANSPORTATION
620 ILCS 35/ - Permanent Noise Monitoring Act.

(620 ILCS 35/1) (from Ch. 15 1/2, par. 751)

Sec. 1. Short title. This Act may be cited as the Permanent Noise Monitoring Act.

(Source: P.A. 87-808.)

 

(620 ILCS 35/5) (from Ch. 15 1/2, par. 755)

Sec. 5. Definitions. As used in this Act:

(a) "Airport" means an airport, as defined in Section 6 of the Illinois Aeronautics Act, that has more than 500,000 aircraft operations (take-offs and landings) per year.

(a-1) "Airport sponsor" means any municipality, as defined in Section 20 of the Illinois Aeronautics Act, that can own and operate an airport.

(a-3) "Annual community noise equivalent level" or "annual CNEL" means the average sound level (on an energy basis), in decibels, of the daily community noise equivalent level over a 12-month period. The annual CNEL is calculated by the following:

Annual CNEL = 10 log10[(1/365) SIGMA antilog (CNEL(i)/10)]

Where:

  • (1) CNEL(i) = the daily CNEL for each day in a continuous 12-month period; and
  • (2) SIGMA means summation.

When the annual CNEL is approximated by measurements on a statistical basis, the number 365 is replaced by the number of days for which measurements are obtained.

(a-5) "Daily community noise equivalent level" or "CNEL" means the 24-hour day average sound level, in decibels, adjusted to an equivalent level to account for the lower tolerance of people to noise during evening and night time periods relative to the daytime period. The daily community noise equivalent level is calculated from the hourly noise levels by the following:

CNEL = 10 log (1/24) [SIGMA antilog (HNLD/10) + 3 SIGMA antilog (HNLE/10) + 10 SIGMA antilog (HNLN/10)]

Where:

  • (1) HNLD means the hourly noise levels for the period 7:00 a.m. through 6:59 p.m.;
  • (2) HNLE means the hourly noise levels for the period 7:00 p.m. through 9:59 p.m.;
  • (3) HNLN means the hourly noise levels for the period 10:00 p.m. through 6:59 a.m.; and
  • (4) SIGMA means summation.

(a-8) "Noise exposure level" means the level, in decibels, of the time-integrated A-weighted squared sound pressure for a stated time interval or event, based on the reference pressure of 20 micronewtons per square meter and reference duration of one second.

(a-9) "Noise level" means the sound level measure, in decibels, of an A-weighted sound pressure level as measured using the slow dynamic characteristic for sound level meters specified in American National Standard Specification for Sound Level Meters (ANSI S1.4-1983 as revised by ANSI S1.4A-1985), which is hereby incorporated by reference. The A-weighting characteristic modifies the frequency response of the measuring instrument to account approximately for the frequency characteristics of the human ear. The reference pressure is 20 micronewtons/square meter (2 x 10-4 microbar).

(b) "Permanent noise monitoring system" or "system" means a system that includes at least:

  • (1) automated noise monitors capable of recording noise levels 24 hours per day 365 days per year; and
  • (2) computer equipment sufficient to process the data from each noise monitor so that permanent noise monitoring reports in accordance with Section 15 of this Act can be generated.

(c) "Division" means the Division of Aeronautics of the Illinois Department of Transportation.

(d) (Blank).

(Source: P.A. 99-202, eff. 1-1-16.)

 

(620 ILCS 35/10) (from Ch. 15 1/2, par. 760)

Sec. 10. Establishment of permanent noise monitoring systems.

(a) No later than December 31, 2008, each airport shall have an operable permanent noise monitoring system. The system shall be operated by the airport sponsor. The airport sponsor shall be responsible for the construction or the design and construction of any system not constructed or designed and constructed as of July 13, 2009 (the effective date of Public Act 96-37). The cost of the systems and of the permanent noise monitoring reports under Section 15 of this Act shall be borne by the airport sponsor.

(b) On or before June 30, 2018, each airport shall upgrade its permanent noise monitoring system to be capable of producing the data necessary to meet the requirements of this Act enacted in Public Act 99-202. On June 30, 2018 and thereafter, an airport's permanent noise monitoring report and noise contour maps shall be produced using the criteria in this Act enacted in Public Act 99-202.

(Source: P.A. 100-165, eff. 8-18-17; 100-863, eff. 8-14-18.)

 

(620 ILCS 35/15) (from Ch. 15 1/2, par. 765)

Sec. 15. Permanent noise monitoring reports. Beginning in 1993 and through 2008, the Division shall, on June 30th and December 31st of each year, prepare a permanent noise monitoring report and make the report available to the public. Beginning in 2009, the airport sponsor shall, on June 30th and December 31st of each year, prepare a permanent noise monitoring report and make the report available to the public. Copies of the report shall be submitted to: the Office of the Governor; the Office of the President of the Senate; the Office of the Senate Minority Leader; the Office of the Speaker of the House; the Office of the House Minority Leader; the United States Environmental Protection Agency, Region V; and the Illinois Environmental Protection Agency. Beginning in 2009, a copy of the report shall also be submitted to the division. The permanent noise monitoring report shall contain all of the following:

(a) Copies of the actual data collected by each permanent noise monitor in the system.

(b) A summary of the data collected by each permanent noise monitor in the system, showing the data organized by:

  • (1) day of the week;
  • (2) time of day;
  • (3) week of the year;
  • (4) type of aircraft; and
  • (5) the single highest noise event recorded at each monitor.

(c) Noise contour maps showing the 65 annual CNEL, 70 annual CNEL and 75 annual CNEL zones around the airport.

(d) Noise contour maps showing the 65 decibel (dBA), 70 dBA, and 75 dBA zones around the airport for:

  • (1) 7:00 a.m. through 6:59 p.m.;
  • (1.5) 7:00 p.m. through 9:59 p.m.;
  • (2) 10:00 p.m. through 6:59 a.m.; and
  • (3) types of aircraft.

(e) The noise contour maps produced under subsections (c) and (d) shall also indicate:

  • (1) residential areas (single and multi-family);
  • (2) schools;
  • (3) hospitals and nursing homes;
  • (4) recreational areas, including but not limited to parks and forest preserves;
  • (5) commercial areas;
  • (6) industrial areas;
  • (7) the boundary of the airport;
  • (8) the number of residences (single and multi-family) within each contour;
  • (9) the number of residents within each contour;
  • (10) the number of schools within each contour; and
  • (11) the number of school students within each contour.

(f) Through 2008, a certification by the Division that the system was in proper working order during the period or, if it was not, a specific description of any and all problems with the System during the period.

(g) Beginning in 2009, a certification by the airport sponsor that the system was in proper working order during the period or, if it was not, a specific description of any and all problems with the system during the period.

(Source: P.A. 99-202, eff. 1-1-16.)

 

(620 ILCS 35/20) (from Ch. 15 1/2, par. 770)

Sec. 20. This Act takes effect upon becoming law.

(Source: P.A. 87-808.)

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