A well casing for a well constructed in unconsolidated materials shall:

1. (a) Extend above the ground surface as follows:

   1. (1) A minimum of 8 inches, or in areas prone to flooding, to a greater height sufficient to prevent entrance of surface water into the well; and
   2. (2) For a well that is part of a public water system as defined in RSA 485:1-a, XV, a minimum of 18 inches.
2. (b) Have a cover with an o-ring, gasket, or other seal to prevent the entrance of insects or other foreign matter into the well;

3. (c) Be terminated using one of the following methods, as determined by the water well contractor based on conditions present and the uses of the well;

   1. (1) Open end casing;
   2. (2) Well screen;
   3. (3) Gravel pack; or
   4. (4) Perforated casing;
4. (d) Have the void area outside the casing grouted in accordance with We 602.05; and
5. (e) When constructed for household use, produce a volume of clear water to meet the demands of the household which the well serves.

Source. (See Revision Note at chapter heading for We 600) #12083 eff 3-1-17