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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 40
Chapter I
Part 749 - PART 749—WATER TREATMENT CHEMICALS
Subpart A - Subparts A-C [Reserved]
Subpart D [§ 749.68 - § 749.68] - Subpart D—Air Conditioning and Cooling Systems
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