5 Colo. Code Regs. § 1002-63.75
SPECIFIC STATUTORY AUTHORITY
The provisions of Colorado Revised Statutes Section 25-8-202(1)(c) and (2), 25-8-205(1)(b) to (d); and (2), and 25-8-508 C.R.S., (1989 Repl. Vol. And 1993 Supp.) provide the specific statutory authority for this amendment to the Colorado Pretreatment Regulations adopted by the Commission. The Commission has also adopted, in compliance with Colorado Revised Statute section 24-4-103(4) (1988 Repl. Vol. And 1992 Supp.), the following Statement of Basis and Purpose.
BASIS AND PURPOSE
The Colorado Department of Health, Water Quality Control Division has proposed amendments to the Regulations for the State Discharge Permit System, 6.1.0 to be heard at the Commission's March 7, 1994 meeting.
Section 4.3.13.D of the Pretreatment Regulations requires industries subject to categorical discharge standards to perform self-monitoring for conventional pollutants, inorganics (including metals) cyanide, and phenol on a monthly or quarterly basis dependant upon discharge volume (at a minimum; the POTW may specify more frequent monitoring if it so chooses. The federal Pretreatment Regulations at 40 CFR Part 403 require only that industrial user self-monitoring be performed no less frequently than semi- annually. The proposed revisions to section 4.3.13.D would allow local municipalities and districts with approved pretreatment programs to relax industrial user self-monitoring for individual parameters, when documentation is provided indicating the absence of that pollutant. Monitoring may not be performed less frequently than semi-annually as per federal; pretreatment requirements.
5 CCR 1002-63.75