EPA’s A Plain English Guide to the EPA Part 503 Biosolids Rule summarizes 40 CFR Part 503. While the guide is not a substitute for the actual rule, it is consistent with the content of the Part 503 rule and can be a helpful tool.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- A Plain English Guide to the EPA Part 503 Biosolids Rule (PDF)(183 pp, 37 MB, September 1994, EPA 832-R-93-003)