[USCC] Composted biosolids vs biosolids under 503

[Chaney, Rufus]

Dear Composters:

At the request of several participants, I contacted EPA officials (Rick
Stevens, Bob Bastian, Jim Smith) who manage the biosolids regulatory
program to obtain a clear statement on the questions raised about
whether a proper biosolids compost was still biosolids.

The bottom line: If a biosolids meets the APL requirements, has
undergone a Class A pathogen reduction treatment and a vector reduction
treatment complying with the rule, it no longer has any of the
management or other requirements of the 503 Rule. It is no longer
biosolids, but a commercial product derived from biosolids. There are no
Federal label requirements for these so called EQ biosolids products.
And surely a properly made compost which included APL biosolids as a
feedstock would comply with the EQ designation in all regards.

Some states have additional requirements that are not part of the
Federal 503 Rule, so check with your state rule to be sure what is
required at your location.

States also provide guidance for use of such products, and enough
information should be provided users that they can use fertilizer or
soil conditioner rates that are appropriate for use of the product.

Rufus Chaney
Beltsville, MD