PERMFILE132052 - Laserfiche WebLink

Home Browse Search

PART It Page Na 20 Permit No. COG-850060 B. RESPONSIBILITIES 15. Section 307 Toxics • If a toxic effluent standard or prohibition, including any applicable schedule of compliance specified, is established by regutarion pursuant to Section 307 of the Federal Act for a toxic pollutant which is present in the permittee's dischazge and such standazd or prolbition is more stringent than any limitation upon such pollutant in the dischazge permit, the Division shall institute proceedings to modify or revoke and reissue the permit to conform to the toxic effluent standazd or prohibition. 16. Anribackslidine a. A permit may not be renewed, reissued, or modified to contain effluent limitations adopted pursuant to Section 25-8-503(1)(b) (BPJ) of the Water Quality Control Act, which aze less stringent than the comparable effluent limitations or standards in the previous permit, unless any one of the following exceptions is met and the conditions ofpazagraph c. of this section aze met: i. Material and substantial alterations or additions to the permitted facility occurred after permit issuance which justify the application of less stringent effluent limitations; or ii. Information is available which was not available at the time of pemrit issuance (other than revised regulations, guidance; or test methods) and which would have justified the application of a less stringent effluent limitation or standard at the time of permit issuance; or iii. The Division determines that technical mistakes or mistaken interpretations of law were made in issuing the permit, which justified relaxation of the effluent limitations or standazds; or iv. A less stringent effluent limitation or standard is necessary because of events over~which the permittee has no control and for which there is not reasonable available remedy; or v. The perarittee has received a permit variance; or vi. The permittee has installed the treatment facIliries required to meet the effluent limitations in the previous perarit an• s properly operated and maintained the facilities but has nevertheless been unable to achieve the previous effluent limitations, in which case, the liantations in the renewed, reissued, or modified permit may reflect the level of pollutant control actually achieved (but shall not be less stringent than requiredby effluent guidelines in effect at the time ofpermifrenewal, reissuance„ or modification). b. A permit may not be renewed, reissued, or modified to contain effiuent limitations adopted pursuant to 61.8(2)(b) or (c) of the Colorado Discharge Permit System Regulations that ate less stringent than the comparable effiuent limitations in the previous permit, unless any of the exceptions provided herein is met and the con 'eons of paragraph c. of this section aze met. i. In waters where the applicable water quality standazd has not yet been attained, effiuent limitations based on a total maximum daily load or other waste load allocation may be revised to be less stringent if the cumulative effect of all such revisions assure:: attainment of such water quality standazd, or the designated use which is not being attained is removed in accordance witk, Section 31.6 of the Basic Standards. ii. In waters where the applicable water quality standazd has been attained, effluent limitations based on a total maximum daily load, other waste load allocation, or any other permitting standazd (including any water quality standazd) maybe revised to br less stringent if such revision is subject to and consistent with the aatidegradation pprovisions of Section 31.8 of the Basic Standazds. ConsistencywithSection3l.SshallbepresumedifthewatersinquestionhavebeendesignatedbytheCommission as "use protected"; or iii. Whether or not the applicable water quality standazd has been attained: (A) Material and substantial alterations or additions to the permitted facility occurred after permit issuance which justified the application of less stringent effluent limitations; or (B) A Less stringent effluent ltmitation is necessary because of events over which the pennittee has no control and for whicl there is not reasonable available remedy; or (C) The permittee has received a permit variance; or (D) The permittee has installed the treatment facilities required to [Heel the effiuent limitations in the previous permit and hay properly operated and maintained the facilities but has nevertheless been unable to achieve the previous effiuent m which case, the limitations in the reviewzd, reissued, or modified permit may reflect the level of pollutant actually achieved (but shall not be less stringent than required by effluent guidelines in effect at the time ofpermit renewal, reissuance, or modification).