Conn. Agencies Regs. § 19-13-B51f - Construction
(a)
Materials. Pipe used for
casing a well other than a dug well shall be made of steel or other material
approved by the commissioner of health. They shall be free from flaws or
defects and shall have watertight connections.
(b)
Dug well. The casing or side
walls of a dug well shall be constructed of watertight concrete at least four
inches thick to a depth of at least ten feet below the ground surface. Below
the depth of the watertight casing, loosely laid stone, concrete block, brick
or other materials approved by the commissioner of health may be used. The
annular space between the face of the excavation and the watertight section of
casing shall be filled with clean clay or other impervious material.
(c)
Gravel well. The casing of a
gravel well shall be surrounded with concrete grout to a depth of at least ten
feet below the ground surface. The annular space between the casings of a
gravel well with artificially placed gravel shall be protected at the top by a
watertight covering to prevent any foreign matter entering the well through the
gravel.
(d)
Drilled
well. The construction of a drilled well shall provide for shutting out
all water except that from the water bearing formations which are intended to
supply water to the well. The casing shall extend at least ten feet below
ground surface. Any annular space surrounding the casing pipe needed for
drilling shall be filled with concrete grout to a depth of at least ten feet
below the ground surface. Below ten feet, any clean fill material can be used.
Where the unconsolidated material above consolidated rock is less than twenty
feet deep and the casing ends in the consolidated rock, the casing shall be
effectively sealed in the rock.
(e)
Upper terminal of casing. The casing of every well shall project
not less than six inches above the established grade at the well or above the
pump house floor. The well contractor shall ascertain the established grade
before completion of the well. Where a pitless adapter is used, it shall be
designed to, and made of materials that will, keep soil and water from entering
the well during the life of the casing. A below-ground connection shall not be
submerged in water at the time of installation. Where a pump is not installed
immediately following the construction of the well, the well shall be tightly
sealed and suitably vented.
Notes
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