NAC534.4361. Monitoring wells: Surface pad; prevention of unauthorized use; additional protective measures.

     1. Unless the area surrounding a monitoring well is paved with concrete or asphalt, a surface pad must be installed around the casing at the surface.

     2. A threaded or flanged cap or compression seal must be installed to prevent unauthorized use of the well. If the top of the well is flush with the surface and the well protector required pursuant to subsection 3 is of a type which may not be locked, the cap or seal must be of a type which may be locked.

     3. The well must also be protected and secured by:

     (a) If it is not necessary for the well to be flush with the surface:

          (1) Setting a steel surface casing which complies with the requirements set forth in NAC 534.360 and extends not less than 5 feet below the surface pad and not less than 1 foot above the surface pad;

          (2) Fitting the top of the steel casing with a locking cap; and

          (3) Clearly marking the well as a monitoring well; or

     (b) If it is necessary for the well to be flush with the surface:

          (1) Placing a well protector capable of supporting vehicular travel which extends one-half inch above the surface pad or concrete or asphalt paving; and

          (2) Clearly marking the well as a monitoring well.

     4. As used in this section, “surface pad” means a formation of concrete or cement grout with a radius from the center of the well of not less than 18 inches and a thickness of not less than 3 1/2 inches which is set around a monitoring well at a slope to ensure that water flows away from the well.

     (Added to NAC by St. Engineer, eff. 12-30-97; A by R039-12, 6-29-2012)