40 CFR § 35.2035 - Rotating biological contractor (RBC) replacement grants.
The Regional Administrator may award a grant for 100 percent of the cost, including planning and design costs, of modification or replacement of RBCs which have failed to meet design performance specifications, provided:
(a) The applicant for a modification/replacement grant demonstrates to the Regional Administrator's satisfaction, by a preponderance of the evidence, that the RBC failure is not due to the negligence of any person, including the treatment works owner, the applicant, its engineers, contractors, equipment manufacturers or suppliers;
(b) The RBC failure has significantly increased the project's capital or operation and maintenance costs;
(c) The modification/replacement project meets all requirements of EPA's construction grant and other applicable regulations, including 40 CFR part 35, and 2 CFR parts 200, 1500 and 1532.
(d) The modification/replacement project is included within the fundable range of the State's annual project priority list; and
(e) The State certifies the project for funding from its regular (i.e., non-reserve) allotments and from funds appropriated or otherwise available after February 4, 1987.