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Code of Federal Regulations
C.F.R. Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER C—AIR PROGRAMS
PART 57—PRIMARY NONFERROUS SMELTER ORDERS
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Subpart D—Supplementary Control System Requirements
§57.401 General requirements.
§57.402 Elements of the supplementary control system.
§57.403 Written consent.
§57.404 Measurements, records, and reports.
§57.405 Formulation, approval, and implementation of requirements.
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