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PART 11 Page No. 30 permit No. COG-850000 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 regul ii. Information is available which was not available at the time permit issuance ma l (other stringent revised effluent limitation or guidance, or test methods) and which would have justified the application 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 standards; 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 permittee has received a permit variance; or uent in the unable to achieve the prey oust revious vi. The rope has installed the tamed the facilities ut has evertheless been limitations and has has properly operated and effluent limitations, in which case, the limitations in the renewed, reissued, or modified permit may reflect the level of pollutant control actually achieved (but shall not be less stringent than required by effluent guidelines in effect at the time of permit renewal, reissuance, or modification). b. A permit may not be rem%ewed, reissued, or modified to contain effluent limitations adopted pursuant to 61.8(2)(b) or (c) of the Colorado Discharge Permit System Regulations that are less stringent than the comparable effluent limitations in the previous permit, unless any of the exceptions provided herein is met and the conditions of paragraph c. of this section are met. i. In waters where the apt plicable water quality standard has not yet been attained, effluent limitations based on a ualitrevised to be les y standard, or the designated uselw effect which is not total maximum all such visions assures attainment of such water y be being attained is removed in accordance with Section 31.6 o the Basic Standards. ii. In waters where the applicable water quality standard has been attained, effluentlimitations based water quality maximum daily load, other waste load allocation, or any other permitting standard (including any standard) may be revised to be less stringent if such revision is subject to and consistent with the antidegradation provisions of Section 31.8 of the Basic Standards. Consistency roith Section 31.8 shall be presumed if the waters question have been designated by the Commission as us p iii. Whether or not the applicable water quality standard 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 limitation is necessary because of events over which the permittee has no control and for which there is not reasonable available remedy; or (C) The permittee has received a permit variance; or (D) The pernnttee has installed the treatment facilities required to meet the effluent limitations in the previous permit and has properly operated and maintained the facilities but has nevertheless been unable to achieve the previous effluent limitations, in which case, the limitations in the reviewed, reissued, or modified permit may reflect the level of pollutant control actually achieved (but shall not be less stringent than required by effluent guidelines in effect at the time of permit renewal, reissuance, or modification). c. In no event may a permit with respect to which paragraphs a. and b. of this section apply be renewed, reissued, or modified to contain an effluent limitation or standard which is less stringent than required by federal effluent guidelines in effect at the time the permit is renewed, reissued, or modified. In no event may such a permit to discharge into state waters be renewed, reissued, or modified to contain a less stringent effluent limitation if the implementation of such limitation would result in a violation of an applicable water quality standard. 17. Effect of Permit issuance a. The issuance of a permit does not convey any property rights or any exclusive privilege. b. The issuance of a permit does not authorize any injury to person or property or any invasion of personal rights, nor does it authorize the infringement of federal, state, or local laws or regulations. stan c. Except for any toxic effluent standard or prohibition imposed under Section 07 of wthe ith a Federal it act d oaring is ermrd for sewage sludge use or disposal under Section 405(d) of the Federal act, complnce permit of the constitutes compliance, for purposes of enforcement, with Sections 301, 302, 306, 318, 403, and 405(a) and (b) T-a......t .,,.+ z.L,urPVer. a nermmt may be modified, revoked and reissued or terminated during its term for cause as set