Part 503 — Standards for the Use or Disposal of Sewage Sludge

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• Subpt. A General Provisions §§503.1 to 503.9
• Subpt. B Land Application §§503.10 to 503.18
• Subpt. C Surface Disposal §§503.20 to 503.28
• Subpt. D Pathogens and Vector Attraction Reduction §§503.30 to 503.33
• Subpt. E Incineration §§503.40 to 503.48