Any well disapproved by the Contracting Officer, or any well
decommissioned/abandoned by the Contractor for any reason shall be
decommissioned/abandoned according to the requirements of the State of
[_____], [ASTM D 5299,] and the requirements of these specifications. Well
decommissioning/abandonment includes the removal of all materials left in
the borehole/well, excluding the filter pack, and including backfill
materials, casing, screen, and any other material placed into the hole
before the decision was made to abandon the borehole/well. Test holes
decommissioned/abandoned for any reason shall be grouted from the bottom to
within [_____] mm feet of the top of the ground surface according to the
protocol for grout/bentonite placement established in paragraph Grout
Placement, using the grout mix specified in paragraph CEMENT AND BENTONITE
GROUT. The top [_____] mm feet shall be backfilled with [material
appropriate for the intended land use] [_____]. The Contractor shall
maintain a well decommissioning/abandonment record as specified in
paragraph Well Decommissioning/Abandonment Records. Groundwater levels, if
encountered before the decision is made for decommissioning/abandonment,
shall be measured in all borings prior to backfilling. These water levels
shall be included in the well decommissioning/abandonment records. No well
shall be decommissioned/abandoned without the approval of the Contracting
Officer.
3.13
DOCUMENTATION AND QUALITY CONTROL REPORTS
The Contractor shall establish and maintain documentation and quality
control reports for well construction and development to record the desired
information and to assure compliance with contract requirements, including,
but not limited to, the following:
3.13.1
Borehole Logs
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NOTE: Borehole logging requirements can be found in
EM 1110-1-4000. Requirements can also be found in
ASTM D 2113 and ASTM D 5434. If rock is cored at
the site, and it is deemed necessary to determine
the rock quality designation (RQD) of the core for
design purposes, the RQD should also be shown on the
boring log. Guidance for determining the RQD may be
found in ASTM D 6032. Item o. has a provision for
recording the level of non-aqueous phase liquids
(NAPLs). This only pertains to wells installed at a
hazardous waste site.
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A borehole log shall be completed for each boring drilled. Borehole logs
shall be prepared by the geologist present onsite during all well drilling
and installation activities. The log scale shall be [10] [_____] mm equals
[300] [_____] mm [1] [_____] inch equals [1] [_____] foot. Copies of
complete well logs shall be kept current in the field at each well site and
shall be available at all times for inspection by the Contracting Officer.
Information provided on the logs shall include, but not be limited to, the
following:
a.
Name of the project and site.
b.
Boring/well identification number.
c.
Location of boring (coordinates, if available).
SECTION 02521
Page 35
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