National Emission Standards for Hazardous Air Pollutants for Secondary Aluminum Production

On March 23, 2000, the EPA issued national emission standards for hazardous air pollutants (NESHAP) for secondary aluminum production facilities under section 112 of the Clean Air Act (CAA). This action amends the applicability provisions for aluminum die casters, foundries, and extruders. The amendments also add new provisions governing control of commonly-ducted units; revise the procedures for adoption of operation, maintenance, and monitoring plans; revise the criteria concerning testing of representative emission units; revise the standard for unvented in-line flux boxes; and clarify the control requirements for sidewell furnaces. These changes are being made pursuant to settlement agreements in two cases seeking judicial review of the NESHAP for secondary aluminum production. A separate rule to clarify compliance dates and defer certain early compliance obligations which might have otherwise come due before completion of this rulemaking was published on September 24, 2002.