40 CFR 503.6 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (§ 425.01 To Parts 611-699) — Environmental Protection Agency (Continued) (§ 425.01 To Parts 611-699) — Sewage Sludge (§ 501.1 To Appendix B To Part 503) — Standards For The Use Or Disposal Of Sewage Sludge (§ 503.1 To Appendix B To Part 503) — General Provisions (§ 503.1 To § 503.9) — Exclusions.