A well casing for a well constructed by excavation shall:

1. (a) Extend above the ground surface a minimum of 18 inches or, in areas prone to flooding, to a greater height sufficient to prevent the entrance of surface water into the well;
2. (b) Have a secure cover with a seal to prevent the entrance of insects or other foreign matter into the well. Wooden covers shall not be used;
3. (c) Have joints sealed to exclude surface water from entering the well, if the joints are within 6 feet of the ground surface;
4. (d) Be set on a bed of clean crushed stone or naturally occurring coarse gravel, if present;
5. (e) Have crushed stone placed around the exterior casing at the bottom section(s) to promote infiltration of water and provide additional storage, if appropriate for the soil conditions at the site; and
6. (f) Be properly aligned.

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