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Well Construction Standard (May 2014), may be obtained from the Records Supervisor <br /> efCode of Federal Regulations, Title 40 Protection of the Environment Subpart H (2010), Rules <br /> Governing New Withdrawals of Ground Water in Water Division 3 Affecting the Rate or Direction <br /> of Movement of Water in the Confined Aquifer System (Confined Aquifer New Use Rules for <br /> Division 3) may be obtained from the the Division of Water Resources, 1313 Sherman Street, <br /> Denver Colorado, 80203. Any Rule that incorporates any of these reference materials does not <br /> include later amendments to or editions of the incorporated material. See § 24-4-103(12.5), <br /> C.R.S. <br /> RULE 4- PURPOSE OF RULES <br /> Basis and Purpose: The statutory authority for this Rule is found in sections 37-91-104(1)(c), (j), & (k); 37- <br /> 91-106(3) & (4); and 37-91-110(2), C.R.S. The purpose of this Rule is to identify the broad purposes for <br /> the Rules. <br /> 4.1 To enable the Board to carry out the provisions of Article 91 of Title 37, C.R.S. <br /> 4.2 To safeguard the public health of the people of the State of Colorado and to protect <br /> the groundwater resources of the State of Colorado. <br /> 4.3 To set minimum standards for the construction, repair, plugging, sealing, and abandonment of <br /> all wells, test holes, monitoring and observation holes and wells, and dewatering wells. <br /> 4.4 To allow certain types of monitoring and observation holes, monitoring and observation <br /> wells, temporary dewatering wells, and test holes to be constructed, utilized, plugged, <br /> sealed, and abandoned by persons other than a licensed well construction contractor. <br /> 4.5 To set minimum standards for the installation and repair of pumping equipment and cisterns. <br /> 4.6 To set minimum standards for the reporting, testing, sampling, measuring, and disinfection of all <br /> wells and associated water well supply systems, to the extent such standards are required for <br /> the proper construction and repair of water wells. <br /> RULE 5- DEFINITIONS <br /> Basis and Purpose: The statutory authority for this Rule is found in sections 37-91-101(1); 37-91-102; <br /> 37- 91-104(1)(c), (j), & (k); 37-91-106(3) & (4); and 37-91-110(2), C.R.S. The purpose of this Rule is to <br /> identify the terms used throughout the Rules. <br /> 5.1 Statutory Definitions- Certain terms used in these Rules have the identical meaning as <br /> provided in section 37-91-102, C.R.S., as quoted and cited in Rule 5.2. <br /> 5.2 Specific Definitions- Unless expressly stated otherwise, the following terms when used in <br /> these Rules have the meaning indicated in this Rule. Terms used in the singular include the <br /> plural. <br /> 5.2.1 "Administrative Denver Basin" means that geographic area including the Denver Basin <br /> Aquifers as defined in (2 CCR 402-6, 1985 (Figure 1). <br /> 5.2.2 "Annular space," or"annulus" means the space surrounding a cylindrical object <br /> within a cylinder, such as the space between the outermost drill pipe,casing or <br /> coupling and the borehole wall. For example, a borehole with a 10-inch diameter, and a <br /> 7-inch outer-diameter casing, will have a 1'%-inch annular space. See Figure 42, below. <br /> FIGURE 4 <br /> 2 ANNULAR SPACE <br />