5 Colo. Code Regs. § 1002-41.18
The provisions of section 25-8-202(1)(a), (b) and (2); 25-8-203; and 25-8-204; C.R.S., provide the specific statutory authority for adoption. The Commission also adopted, in compliance with section 24-4-103(4) C.R.S., the following statement of basis and purpose of these amendments.
STATEMENT OF BASIS AND PURPOSE
During the December, 1993, hearing on the basic Standards for Ground Water, a number of parties and members of the public spoke and submitted evidence on the difficulties of implementing Practical Quantitation Limits (PQL's). It was determined at that time that the Division would consider the problem during this proceeding. A determination has been made that PQL's are more appropriately addressed within the Regulations for State Discharge Permit System, allowing more flexibility in applying the PQL's to regulated discharges. The PQL column in Table A has been removed, as have all footnotes to the Table A that pertained to PQL's. Note that the same modifications have been made to the Basic Standards and Methodologies for Surface Water (3.1.0).
Parties to this hearing also suggested that the Commission consider replacing the current bromodichloromethane, bromoform, chloroform, and dibromochloromethane standards with a total trihalomethanes (THMs) standard based on the current drinking water maximum contaminant level for total THMs, as was done in this hearing for surface water. The Commission has declined to do so, since one of the major factors applicable to the surface water situation-impact on dischargers-has not been demonstrated to apply with respect to ground water.
PARTIES TO THE JULY 11, 1994 HEARING
5 CCR 1002-41.18