(A) The categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405-471 are hereby incorporated.
(B) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the director may impose equivalent concentration or mass limits in accordance with the conditions in 62-625.410(4), F.A.C., as hereby incorporated.
(C) When the limits in a categorical pretreatment standard are expressed only in terms of mass of pollutant per unit of production, the director may convert the limits to equivalent limitations expressed either as mass of pollutant discharged per day or effluent concentration for purposes of calculating effluent limitations applicable to individual IUs in accordance with conditions in 62-625.410(4), F.A.C.
(D) When wastewater subject to a categorical pretreatment standard is mixed with wastewaters other than those regulated by the same standard, alternative discharge limits shall be derived by the control authority or by the IU with the written concurrence of the control authority in accordance with 62-625.410(6), F.A.C. as hereby incorporated.
(E) The director may convert the mass limits of the categorical pretreatment standards of 40 CFR Parts 414, 419, and 455 to concentration limits for purposes of calculating limitations applicable to individual IUs. The conversion is at the discretion of the director and shall follow the provisions of 62-625.410(4)(i), F.A.C. and 40 CFR 403.6(d), (c)(7), (c)(8) and (c)(9).
(F) An IU may obtain a variance from a categorical pretreatment standard if the IU can prove, pursuant to the procedural and substantive provisions in 62-625.700, F.A.C, as hereby incorporated, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.
(G) Equivalent limitations calculated in accordance with 62-625.410(4) are deemed pretreatment standards for the purposes of Section 307(d) of the Clean Water Act and this chapter. The control authority shall document how the equivalent limits were derived and make this information available in the IU's file for public review. Once incorporated into its permit, the IU must comply with the equivalent limitations in lieu of the categorical pretreatment standards from which the equivalent limitations were derived.
(H) Any IU operating under a permit incorporating equivalent mass or concentration limits calculated from a production based standard shall notify the control authority within two business days after the IU has a reasonable basis to know that the production level will change more than 205within the next calendar month. Any industrial user not notifying the control authority of such anticipated change will be required to meet the mass or concentration limits in its control mechanism that were based on the original estimate of the long-term average production rate.
(I) An IU may obtain a net gross adjustment to a categorical standard in accordance with 62-625.820, F.A.C., as hereby incorporated.
(Ord. 679, passed 9-26-2017)