Current through Register Vol. 48, No. 38, September 20, 2024
a)
Applicability
1) Aluminum forming includes
commonly recognized forming operations such as rolling, drawing, extruding, and
forging, and related operations such as heat treatment, casting, and surface
treatments. Surface treatment of aluminum is any chemical or electrochemical
treatment applied to the surface of the aluminum. Such surface treatment is
considered to be a part of aluminum forming whenever it is performed as an
integral part of aluminum forming. For this Subpart CP, surface treatment of
aluminum is considered to be an integral part of aluminum forming whenever it
is performed at the same plant site at which aluminum is formed and such
operations are not considered for regulation under the electroplating and metal
finishing provisions of Subparts N and AH. Casting aluminum when performed as
an integral part of aluminum forming and located on-site at an aluminum forming
plant is considered an aluminum forming operation and is covered under this
Subpart CP. When aluminum forming is performed on the same site as primary
aluminum reduction the casting must be regulated by Subpart CT (nonferrous
metals) if there is no cooling of the aluminum before casting. If the aluminum
is cooled before casting, then the casting must be regulated by this Subpart
CP.
2) This Subpart CP applies to
any aluminum forming facility, except for plants identified under subsection
(a)(3), that introduces or may introduce pollutants into a POTW.
3) This Subpart CP applies to indirect
discharging aluminum forming plants that extrude less than three million pounds
of product per year and draw, with emulsions or soaps, less than one million
pounds per year.
b)
General Definitions. The Board incorporates by reference
40 CFR
467.02 (2003). This incorporation includes no
later amendments or editions.
c)
Monitoring Requirements. The Board incorporates by reference
40 CFR
467.03 (2003). This incorporation includes no
later amendments or editions.
d)
Compliance Dates. The Board incorporates by reference
40 CFR
467.04 (2003). This incorporation includes no
later amendments or editions.
e)
Removal Credits. The control authority may grant removal credits under Subpart
C of 35 Ill. Adm. Code 310 for toxic metals limited in this Subpart CP when
used as indicator pollutants.
