Current through Register Vol. XLI, No. 50, December 13, 2024
Section 47-60-7 - Well Riser7.1. The well riser for wells constructed in a floodplain or floodway shall terminate a minimum of two (2) feet above ground level and be provided with a watertight cap, unless it can be demonstrated that inundation will not occur, except as provided for in subsection 11.6 of this rule.7.2. Specifications. -- The riser must consist of materials that will not alter the quality of water samples for the constituents of concern and that are appropriate for the monitoring environment. The riser should have adequate wall thickness and coupling strength to withstand installation and development stresses. Each section of riser should be uncontaminated prior to installation. The minimum nominal internal diameter of the riser should be chosen based on the particular application. However, in most instances, a minimum of two (2) inches (50.8 mm) is needed to accommodate sampling devices. Note: Risers are generally constructed of PVC, stainless steel, fiberglass, or fluoropolymer materials.
7.3. Assembly and Installation. -- Where the well is to be used for organic water quality monitoring, all riser couplings shall use a coupling method that is watertight and that does not introduce organic compounds to the well. Wells that will not be monitored for organic compounds may use any industry accepted watertight coupling method.7.4. Inspection. -- Prior to use, the casings, couplings and other components shall be inspected for cuts, deformities, gouges, deep scratches, damaged ends, and other imperfections that could compromise the integrity of the well. Any casing, coupling or component having such a defect may not be used.7.5. Risers shall be centered in the borehole, using centralizers if necessary, except in the case of nested monitoring wells.7.6. A protective cap on the well riser may be necessary during the installation of the annular space seal, the filter pack, the filter pack seal and the ground surface seal to prevent any of these materials from entering the monitoring well.