This guidance discusses the requirements under 40 CFR Part 503, Standards for the Use or Disposal of Sewage Sludge for persons who apply domestic septage to non-public contact sites. Non-public contact sites are land application sites that are not frequently visited or used by the public. Non-public contact sites include agricultural land, forests, and reclamation sites.

• Domestic Septage Regulatory Guidance: A Guide to The EPA 503 Rule (PDF)(91 pp, 11 MB, September 1993, EPA 832-B-92-005)