EPA promulgated the Aluminum Forming Effluent Guidelines and Standards (40 CFR Part 467) in and amended the regulation in . The regulation covers direct and indirect dischargers. The Effluent Guidelines and Standards are incorporated into NPDES permits for direct dischargersA point source that discharges pollutants to waters of the United States, such as streams, lakes, or oceans., and permits or other control mechanisms for indirect dischargersA facility that discharges pollutants to a publicly owned treatment works (municipal sewage treatment plant). (refer to Pretreatment Program).
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Aluminum forming is the deformation of aluminum or alloys into specific shapes by hot or cold working such as rolling, extrusion, forging, and drawing. Also included are a number of ancillary operations such as casting, heat treatment, and surface treatment that are an integral part of aluminum forming processes and that can contribute significantly to the wastewater discharged from aluminum forming plants.
Products manufactured by aluminum forming operations generally serve as stock for subsequent fabricating operations.
Aluminum forming activities are included within the following NAICS groups:
the NAICS listing is provided as a guide and does not define the coverage of the Aluminum Forming Category. For precise definitions of coverage, refer to the applicability sections in 40 CFR Part 467
The Aluminum Forming regulation is organized into six subcategories. Each subcategory consists of core and ancillary operations. The core operations include the forming operation along with processes that are either closely linked with that forming operation or generate very little or no wastewater. Some plants are covered by more than one subcategory.
There are three paragraphs in 40 CFR 467.01 that describe which facilities are subject to the regulation.
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Paragraph (a) is a broad description of those facilities covered by this rule.
Paragraph (b) says that all aluminum forming facilities as described in the first paragraph are covered by the rule, except for &#;plants identified under paragraph (c).&#;
Paragraph (c) provides that indirect discharging
small extrusion and small drawing with emulsions or soaps facilitiesExtrusion facilities that extrude less than 3 million pounds of product per year and draw with emulsions or soaps less than 1 million pounds per year [40 CFR 467.01(c)]
are covered by the rule. In fact, contrary to the language of paragraph (b), paragraph (c) does not identify any facilities that are not subject to the rule.In other words, all facilities that meet the description of the first paragraph, regardless of their size or how they form the aluminum, are covered by this regulation.
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