NOTE: The designer must address disposal of drill
cuttings, rock core, grout or bentonite slurry, and
other solid or liquid materials bailed, pumped, or
otherwise removed from the borehole during drilling,
well installation, completion, and well development
procedures within all appropriate regulatory
requirements. The nature of these wastes (whether
hazardous or not) will potentially vary between well
sites on a single project. On an HTRW remedial
action project, it may be prudent to dispose of
drilling and well installation waste in coordination
with other project waste streams. In some
instances, rock core may be determined to be
contaminated and must be handled accordingly. Refer
to EPA/540/G-91/009, Management of
Investigation-Derived Waste From Site Investigations
and EPA OSWER Directive 9345.3-03FS, April 1992,
Guide to Management of Investigation-Derived Wastes,
for discussion of some issues relevant to Superfund
projects. State/local regulations must also be
considered.
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Slurry, drill cuttings, rock core; other solid or liquid material bailed,
pumped, or otherwise removed from the borehole during drilling,
installation, completion, and well development procedures; and fluids from
material/equipment decontamination activities shall be disposed of by
[_____].
3.11
SURVEYS
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NOTE: Guidance for installing survey markers can be
found in EM 1110-1-1002 Survey Markers and
Monumentation.
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Coordinates and elevations shall be established for each well/test hole.
Horizontal coordinates shall be determined to the closest 300 mm 1.0 foot
and referenced to the State Plane Coordinate System, or Universal
Transverse Mercator (UTM). If the State Plane Coordinate System/UTM is not
readily available, an existing local grid system shall be used. A ground
elevation to the closest 30 m 0.1 foot shall be obtained at each well. The
highest point on the top of the riser pipe will serve as a measurement
point. The elevation of the well shall reference this point, and shall be
surveyed to the nearest 3 mm 0.01 foot using the [National Geodetic
Vertical Datum of 1929] [North American Vertical Datum of 1988]. If the
datum is not readily available, the existing local vertical datum shall be
used. The location, identification, coordinates, and elevations of the
well and monuments shall be plotted on maps with a scale large enough to
show their location with reference to other structures.
3.12
WELL DECOMMISSIONING/ABANDONMENT
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NOTE: Guidance for decommissioning of wells may
also be found in EM 1110-1-4000.
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SECTION 02521
Page 34
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