5 Colo. Code Regs. § 1002-34.49
The provisions of C.R.S. 25-8-202(1)(a), (b) and (2); 25-8-203; 25-8-204; and 25-8-402; provide the specific statutory authority for adoption of these regulatory amendments. The Commission also adopted in compliance with 24-4-103(4) C.R.S. the following statement of basis and purpose.
BASIS AND PURPOSE:
Pursuant to the requirements in the Basic Standards (at 31.7(3)), the commission reviewed the status of temporary modifications scheduled to expire before December 31, 2020 to determine whether the temporary modification should be modified, eliminated, or extended.
For the temporary modifications set to expire after the effective date of this hearing, the commission reviewed progress toward resolving the uncertainty in the underlying standard and/or the extent to which conditions are a result of natural or anthropogenic conditions, and evaluated whether the temporary modifications were still necessary. The commission took no action on the following temporary modifications:
La Plata Segment 7a (COSJLP07a): temporary modification of the ammonia standards (expires 6/30/2020). Vista Verde continues to make progress on resolving the uncertainty regarding the degree to which the ammonia loading from Vista Verde's effluent discharge is irreversible, and will complete an alternatives analysis to resolve this uncertainty and determine how much water quality improvement is feasible. The commission made no change to the expiration date, as the original time allotment was deemed adequate to resolve the uncertainty.
La Plata Segment 9 (COSJLP09): temporary modification of the ammonia standards (expires 6/30/2020). Lee Mobile Home Park continues to make progress on resolving the uncertainty regarding the degree to which the ammonia loading from Lee Mobile Home Park's effluent discharge is irreversible, and will complete an alternatives analysis to resolve this uncertainty and determine how much water quality improvement is feasible. The commission made no change to the expiration date, as the original time allotment was deemed adequate to resolve the uncertainty.
5 CCR 1002-34.49