South Carolina Code of Regulations
Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
Subchapter 61-71 - Well Standards
Section 61-71.I - BORINGS
Universal Citation: SC Code Regs 61-71.I
Current through Register Vol. 48, No. 9, September 27, 2024
1. Geotechnical Borings.
a. Geotechnical borings shall be abandoned within
five days of borehole completion.
b.
Geotechnical borings shall be backfilled with a suitable material, such as the
native material removed from the boring, to eliminate safety hazards and
infiltration of runoff into the boring.
2. Exploration Borings
a. Exploration borings shall be abandoned or cased
to observe groundwater levels within five days of borehole completion or completion
of geophysical logging. When cased, the casing shall be grouted per the requirements
of R.61-71.F.2.
and shall be capped for safety when not in use.
b. Exploration borings in near surface
unconsolidated formations or saprolite shall be backfilled with a suitable material,
such as the native material removed from the boring, to eliminate safety hazards and
infiltration of runoff into the boring.
c. Exploration borings in indurated or
consolidated formations shall be abandoned by filling with either bentonite-cement,
neat cement, 20% high solids sodium bentonite grout, sand, or gravel to within no
less than twenty feet of the surface and the remainder shall be filled with neat
cement, bentonite-cement, or 20% high solids sodium bentonite grout.
d. Exploration borings in indurated or
consolidated formations shall be abandoned by forced injection of grout or pouring
through a tremie pipe starting at the bottom of the borehole and proceeding to the
surface in one continuous operation.
e.
Special precautions shall be used to abandon exploration borings if natural voids,
such as solution cavities in limestone, significant fractures, and shear zones, are
encountered. Suitable grout and grouting methods shall be used when such conditions
exist to ensure the long-term integrity of the grout in the abandoned
borehole.
f. Exploration borings
constructed on property that is included in an active mine permit shall be exempt
from this Section of this regulation.
g.
A form provided and/or approved by the Department shall be completed and submitted
to the Department within 30 days after completion of the exploration project, or
phase in exploration drilling, whichever occurs first. The Department shall treat
the approved form completed and submitted for exploration boring abandonment as
confidential trade secrets and proprietary business information and not subject to
public disclosure under the Freedom of Information Act.
3. Environmental Soil Sampling Borings
a. All analytical data obtained from each
environmental soil sampling boring shall be submitted to the Department within 30
days of receipt of laboratory results unless another schedule has been
approved_by_the Department.
b. The
boring shall be abandoned within five days of borehole completion.
c. Borings five feet in depth or shallower may be
abandoned by backfilling with native fill material.
d. Borings greater than five feet in depth shall
be completely filled from the bottom of the borehole to the land surface with
bentonite-cement, neat cement, or 20% high solids sodium bentonite grout.
e. The boring shall be abandoned by forced
injection of grout or pouring through a tremie pipe starting at the bottom of the
borehole and proceeding to the surface in one continuous operation.
f. A Water Well Record Form 1903 or other form
provided and/or approved by the Department shall be completed and submitted to the
Department within 30 days after abandonment.
4. Horizontal Borings.
a. Horizontal borings shall be backfilled with a
suitable material, such as the native material removed from the boring, to eliminate
safety hazards and infiltration of runoff into the boring.
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