CHAPTER II. STANDARDS
Section 11. Disinfection and Other Sanitary Requirements.
- Disinfection.Note 13 All wells producing water for domestic use (i.e., drinking
or food processing) shall be disinfected following construction, repair, or
when work is done on the pump, before the well is placed in service.
- Gravel. Gravel used in gravel-packed wells shall come from clean sources
and should be thoroughly washed before being placed in the well. Gravel
purchased from a supplier should be washed at the pit or plant prior to
delivery to the well site.
- During placement of the gravel in the annular space disinfectants (usually
calcium hypochlorite in tablet or granular form) shall be added to the gravel
at a uniform rate (two tablets per cubic foot or one pound of the granular
form per cubic yard).
- Lubricants. Mud and water used as a drilling lubricant shall be free from
sewage contamination. Oil and water used for lubrication of the pump and
pump bearing shall also be free from contamination.