Code of Colorado Regulations
1000 - Department of Public Health and Environment
1002 - Water Quality Control Commission (1002 Series)
5 CCR 1002-42 - REGULATION NO. 42 - SITE-SPECIFIC WATER QUALITY CLASSIFICATIONS AND STANDARDS FOR GROUND WATER
Section 5 CCR 1002-42.22 - STATEMENT OF BASIS, SPECIFIC STATUTORY AUTHORITY, AND PURPOSE: JANUARY, 1998 RULEMAKING
Current through Register Vol. 47, No. 5, March 10, 2024
The provisions of C.R.S. 25-8-202; 25-8-203; and 25-8-204 provide the specific statutory authority for adoption of these regulatory provisions. The Commission has also adopted, in compliance with C.R.S. 24-4-103(4), the following statement of basis and purpose.
BASIS AND PURPOSE
A. Background
This hearing was held to complete the first round of "housekeeping" measures adopted in March, 1996. The principal objective of that hearing was to improve the clarity, organization and useability of the ground water standards and classifications regulations, "The Basic Standards for Ground Water", Regulation No. 41 and "Site-Specific Water Quality Classifications and Standards for Ground Water" , Regulation No. 42. Proposed changes reviewed at this hearing pertained solely to the "Site-Specific Water Quality Regulated for Ground Water".
B. Actions/Rationale
The Commission replaced all of the maps (Figures 1 through 40) of the specified areas for site-specific ground water classifications and standards with geographical information system (GIS) based maps. The GIS maps were developed from the original set of maps contained in the regulations, and are therefore very similar. The principal differences are the size and the amount of topographical detail found on each.
Users will find the GIS maps easier to read and reference as each map occupies one page and is significantly less busy. This is a change from the previous set which used USGS 7.5 minute quadrangles and, depending on the size of the specified area, took up to four pages. Although accurate representations of the specified areas, the original maps were difficult and cumbersome to use due to the need to flip pages back and forth. This made it difficult to get a clear picture of the actual size and outline of the specified area.
To ensure that the detail that is missing on the GIS maps is available for reference, the Commission agreed to maintain a separate set of large scale maps for each specified area. These will depict the specified areas as adopted by the Commission, and can be viewed at the Commission office during normal business hours. Reference to these maps is included in sub-section 42.3 of the regulation, and has been inserted in the narrative describing each of the specified areas.
A legend was developed for the GIS generated maps, and is found immediately before the first figure. The legend provides a clear visual explanation of the key features of the maps, and is a valuable reference. The larger reference maps maintained in the Commission office with have the USGS legend.
References to Figures 39 and 40, the most recently adopted specified areas for site-specific ground water classifications and standards, were added to the outline map of Colorado found on page 3 of the regulations.
