FDF variances.
Huntsville Code of Ordinances § 21-167
in effectSec. 21-167. - FDF variances.
FDF (fundamentally different factors) variances, referred to in section 307(b) of the Clean Water Act of 1977, are allowances in which an industrial user can present information and data to the EPA and the AWIC which verify that the user's particular process is different, fundamentally, from others in his pretreatment category and thus different from those factors which were used to develop the categorical pretreatment standards for that group. These are case-by-case adjustments which can make the standards more or less stringent and approval for such requests is reserved for the EPA. The written submission, however, is handled by the AWIC and should have certain content and be in acceptable form. This information as well as essential qualifications for approval and other aspects of the FDF variance are available from the AWIC upon request. The city reserves the right to comment on FDF variance applications submitted by its industrial users.
(Ord. No. 81-192, § 13, 6-25-1981)
Source: City of Huntsville, Alabama, publisher code (Municode) + enacted ordinances (City Council/Legistar)URL: https://library.municode.com/al/huntsville/codes/code_of_ordinances?nodeId=COOR_CH21SESEDIOTWADI_ARTIISESEDI_DIV5PE_S21-167FDVAFetched: 11/6/2026