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
To remain consistent with the Commission's decisions regarding arsenic at Section 35.36 , an arsenic temporary modification was added to Upper Gunnison segment 13a, which had an existing chronic arsenic standard of 0.02 ug/l and a permitted discharger with a predicted water quality-based effluent limit compliance problem.
5 CCR 1002-35.39