NAC445A.918. Tests for mechanical integrity: Methods for determining absence of movement of fluid.

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One of the following methods must be used in the test for mechanical integrity to determine the absence of significant movement of fluid into an underground source of drinking water through a vertical channel adjacent to the well bore:

     1. The results of a survey of the temperature or noise of a well.

     2. Records of cementing which demonstrate the presence of adequate cement behind the casing to prevent migration of fluid.

     3. In an appropriate hydrogeologic setting, a survey using a radioactive tracer, which must be used in conjunction with at least one of the other alternatives.

(Added to NAC by Environmental Comm’n, eff. 7-22-87)—(Substituted in revision for NAC 445.42745)

                    
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