DWR_4148979 - Laserfiche WebLink

c. Wells equipped with turbine pumps and diverters which are supported on the metal well casing or metal sole plates must also be arranged to promote sanitary conditions in the well and to prevent entry of contaminants, water, insects or animals into the well. d. Requirements for venting are presented in Rule 11.5.2. 10.1.4 When hazardous contaminants are known or suspected to be encountered during well construction, the contractor is responsible for ensuring that his or her personnel are adequately trained and that proper safety equipment is provided to handle and contain those substances. 10.1.5 Nested wells completed in different aquifers or production zones must be grouted to prevent intermingling of groundwater.-and require a written variance. 10.1.6 10.1.6 Any hydraulic fracturing or stimulation of a well must be restricted to the permitted production interval and must not compromise the integrity of an adjoining confining layer or aquifer.unit or aquifer. (See Rule 6.2.1, 10.4.5.3) Upon request of the Chief Well Inspector or other staff of the State Engineer, the driller or authorized individual must provide reports or other data concerning the hydraulic fracturing of the water well. Such information may include, but is not limited to the interval within which hydraulic fracturing was performed, pressures used, duration, formation fractured, medium used to perform fracturing, additives used in the fracturing medium, production rate prior to fracturing and production rate after fracturing. 10.2 Well Location - When selecting a well location, consideration must be given to topography, drainage, sources of contaminants, underground utility locations, and other onsite conditions in order to promote sanitary conditions and prevent contamination of the well and aquifer. The ground surface in the vicinity of the well should be sloped to prevent the concentration of, and discourage the infiltration of, surface water at or near the wellhead. 10.2.1 When locating wells, well construction contractors and private drillers must comply with the regulations of federal, state, county, municipal, or local governments, in determining the required distance from sources of contaminants, when those regulations are more stringent than the minimum standards of these Rules. 10.2.2 Wells must not be located closer than one-hundred (100) feet horizontally to the nearest existing source of contaminants (leach fields, contaminant plumes, chemical storage areas, commercial feedlots or stockyards, unlined solid or liquid waste facilities, outhouse, waste transfer stations, etc) or fifty (50) feet horizontally from a septic tank, exterior sewer line or lines, sewer lines beneath the footprint of structures, other vessel above or below ground vessels containing contaminants,- (including petroleum-based and other toxic products). A request for variance (as provided for in Rule 18) must be submitted and written approval from the Board must be obtained prior to the construction of a well that cannot meet this spacing requirement. The variance request must be prepared by a water well construction contractor or authorized individual, must be based on hydrogeologic information, and must comply with the minimum requirements shown in Figure 2a or 2b (whichever is applicable) to the greatest extent possible, 10.2.3 In the event a well is constructed as a replacement for an existing well that is located less than one hundred (100) feet horizontally from a source of existing contaminants, the replacement well must not be located closer to the source of contaminants. The distance between the perimeter of that source and the base of the grout seal must not be less than 100 feet, as shown in Figure 2a (or not less than 50 feet as shown in Figure 2b), unless a variance request prepared in accordance with the provisions of Rule 10.2.2, is granted.