What regulation sets standards for the safe handling and use of sewage sludge?

• A. 50 CFR 403
• B. 40 CFR 503
• C. 36 CFR 503
• D. 40 CFR 503A

Answer: (B)

The regulation that sets standards for the safe handling and use of sewage sludge is 40 CFR Part 503. This rule, titled Sewage Sludge Use and Disposal, establishes the federal requirements for how biosolids can be processed, treated, tested, stored, and applied to land or disposed of. It specifies pollutant concentration limits for metals and other contaminants, sets pathogen reduction criteria to protect public health, and includes rules to minimize vector attraction and environmental risks. It also covers required management practices, testing and analysis, recordkeeping, and reporting, along with the allowable methods and timing for land application, surface disposal, and incineration. The other regulations listed pertain to different areas—pretreatment of discharges, wildlife and parks, or unrelated sections—so they do not govern sewage sludge handling and use.