Utah Admin. Code R655-4-13 - Deepening, Rehabilitation, and Renovation of Wells
13.1 Sealing of Casing.
13.1.1 If in the repair of a drilled well,
the old casing is withdrawn, the well shall be recased and resealed in
accordance with the requirements provided in Subsection
R655-4-11 (11.4).
13.2 Inner Casing.
13.2.1 If an inner casing is installed to
prevent leakage of undesirable water into a well, the space between the two
well casings shall be completely sealed using packers, casing swedging, or
pressure grouting, to prevent the movement of water between the
casings.
13.3 Outer
Casing.
13.3.1 If the "over-drive" method is
used to eliminate leakage around an existing well, the casing driven over the
well shall meet the minimum specifications listed in Subsection
R655-4-11 (11.4).
13.4 Artesian Wells.
13.4.1 If upon deepening an existing well, an
artesian zone is encountered, the well shall be cased and completed as provided
in Subsection R655-4-11 (11.4).
13.5 Drilling in a Dug Well.
13.5.1 A drilled well may be constructed
through an existing dug well provided that:
13.5.1.1 Unperforated Casing Requirements. An
unperforated section of well casing extends from a depth of at least ten feet
below the bottom of the dug well and at least 20 feet below land surface to
above the maximum static water level in the dug well.
13.5.1.2 Seal Required. A two-foot thick seal
of neat cement grout, sand cement grout, or bentonite grout is placed in the
bottom of the dug well so as to prevent the direct movement of water from the
dug well into the drilled well.
13.5.1.3 Test of Seal. The drilled well shall
be pumped or bailed to determine whether the seal described in Subsection
R655-4-13 (13.5.1.2) is adequate
to prevent movement of water from the dug well into the drilled well. If the
seal leaks, additional sealing and testing shall be performed until a water
tight seal is obtained.
13.6 Well Rehabilitation and Cleaning.
13.6.1 Tools used to rehabilitate or clean a
well shall be cleaned, disinfected, and free of contamination before placement
in a well.
13.6.2 The driller shall
use rehabilitation and cleaning tools properly so as not to permanently damage
the well or aquifer. If the surface seal is damaged or destroyed in the process
of rehabilitation or cleaning, the driller shall repair the surface seal to the
standards set forth in Subsection
R655-4-11 (11.4).
13.6.3 Debris, sediment, and other materials
displaced inside the well and surrounding aquifer as a result of rehabilitation
or cleaning shall be completely removed by pumping, bailing, well development,
or other approved methods.
13.6.4
Detergents, chlorine, acids, or other chemicals placed in wells for increasing
or restoring yield, shall be specifically designed for that purpose and used
according to the manufacturer's recommendations.
13.6.5 Any renovation, rehabilitation,
cleaning, or other work on a well that requires alteration of the well itself
shall be conducted by a licensed well driller.
13.6.6 Following completion of deepening,
renovation, rehabilitation, cleaning, or other work on a well, the well shall
be properly disinfected in accordance with Subsection
R655-4-11 (11.6.5).
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.