Section 901.105  Impact Forging Operations

a)         For purposes of this Section, only the following are applicable:

1)         Daytime hours means any continuous 16 hour period between 6:00 a.m. and 11:00 p.m. local time; and

2)         Nighttime hours means those 8 hours between 10:00 p.m. and 7:00 a.m. which are not part of the 16 continuous daytime hours.

3)         The reference time for Leq, as defined in 35 Ill. Adm. Code 900.101 is one hour.

4)         New Impacting Forging Operation is that property-line-noise-source comprised of impact forging operation on which construction began after September 1, 1982.

5)         Existing Impact Forging Operation is that property-line-noise-source comprised of impact forging operations which are in existence on September 1, 1982,

b)         Emission Limitations for New Impact Forging Operation.

No impact forging operation shall cause or allow the emission of impulsive sound to any receiving Class A or B land which exceeds the allowable sound levels specified in the following table when measured at any point within such receiving land, provided however, that no measurement of sound levels shall be made less than 25 feet from such new impact forging operation's property-line.

c)         Limitations for Existing Impact Forging Operation

No existing impact forging operation shall cause or allow the emission of highly-impulsive sound to any receiving Class A or B land which exceeds the allowable sound levels specified in the following table, when measured at any point within such receiving land, provided however, that no measurement of sound levels shall be made less than 25 feet from such existing impact forging operation's property-line, unless such forging operation is granted a permanent site specific allowable operational level pursuant to subsection (d).

d)         Site Specific Allowable Operational Level for Existing Impact Forging Operation

1)         An existing impact forging operation which does not comply with subsection (c) may seek a permanent site specific allowable operational level from the Board.  A permanent site specific level is that level of operation allowed petitioner after review and approval by the Board and after implementation of abatement measures, if any, approved by the Board.

2)         Any existing impact forging operation seeking a permanent site specific operational level must submit as its petition the following:

A)        The location of the petitioner, a description of the surrounding community, and a map locating the petitioner within the community;

B)        A description of the petitioner's operations, the number and size of the petitioner's forging hammers, the current hours of hammer operation, the approximate number of forgings manufactured during each of the three prior calendar years and the approximate number of hammer blows used to manufacture the forgings.

C)        A description of any existing sound abatement measure.

D)        The sound levels in excess of those permitted by subsection (c) emitted by the petitioner into the community, in 5 decibel increments measured in L_eq, shown on the map of the community.

E)         The number of residences exposed to sound levels in excess of those permitted by subsection (c);

F)         A description of other significant sources of noise (mobile and stationary) and their location shown on the map of the community;

G)        A description of the proposed operational level and proposed physical abatement measures, if any, a schedule for their implementation and their costs;

H)        The predicted improvement in community sound levels as a result of implementation of the proposed abatement measures; and

I)          A description of the economic and technical considerations which justify the permanent site specific allowable operational level sought by petitioner.

e)         Land Use Classifications Preserved

The land use classifications in effect within a one-mile radius of an existing impact forging operation on September 1, 1982 remains the applicable land use classification for enforcement of these rules against an existing forging operation and any future modification thereof, regardless of actual subsequent changes in land use unless such actual changes would impose less restrictive limitations on the impact forging operations.

f)          Site-Specific Operational Levels

Each individual existing forging operation identified in Sections 901.110, 901.111 and 901.112 must comply with the site-specific operational level defined, or is otherwise subject to Section 901.105(c).

(Source:  Amended at 30 Ill. Reg. 5533, effective March 10, 2006)