excavation in this section or revise the reference
to the appropriate section of the specifications;
see EM 1110-3-178 for guidance.
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The tank area and any other excavations shall be backfilled [as soon as
possible after tank and contaminated soil removals have been completed and
confirmation samples have been taken] [only after the soil test results
have been approved]. Contaminated soil removal shall be complete after
[the bottom of the tank excavation is determined to have soil contamination
levels below the state standards of [100] [_____] ppm TPH] [approval by the
[state inspector] [Contracting Officer]]. The excavation shall be
dewatered if necessary. Stockpiled material subjected to chemical
confirmation testing shall be used as backfill if it is found to [conform
to the requirements of clean fill per appropriate [state] [local]
regulations] [contain less than [100] [_____] ppm of total petroleum
hydrocarbons (TPH)] [contain less than [10] [_____] ppm of BETX] [_____].
Backfill consisting of clean fill shall be placed in layers with a maximum
loose thickness of [_____] [200] mm [_____] [8] inches, and compacted to
[90] [_____] percent maximum density for cohesive soils and [95] [_____]
percent maximum density for cohesionless soils. Density tests shall be
performed by an approved commercial testing laboratory or by facilities
furnished by the Contractor. Test results shall be attached to
contractor's Quality Control Report. A minimum of 1 density test shall be
performed on [each] [_____] lift. Laboratory tests for moisture density
relations shall be determined in accordance with ASTM D 1557, Method B, C,
or D, or ASTM D 3017. A mechanical tamper may be used provided that the
results are correlated with those obtained by the hand tamper. Field
in-place density shall be determined in accordance with ASTM D 1556, ASTM D
2922, or ASTM D 2167.
3.12
DISPOSAL REQUIREMENTS
3.12.1
Treatment, Disposal, and Recycling
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NOTE: List approved facilities in the area of the
project.
Many IA's allow contaminated soil treatment onsite
and the specification revised accordingly with
potential IA approval of a work plan. The approval
process should be started by the designer, if
possible, to ensure IA approval does not cause
project delays.
Supply the EPA hazardous waste number in accordance
with 40 CFR 261.
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Disposal of [hazardous] [or] [special] wastes shall be in accordance with
all local, State, and Federal solid and hazardous waste laws and
regulations; the RCRA; Section 02120 TRANSPORTATION AND DISPOSAL OF
HAZARDOUS MATERIALS; and conditions specified herein. This work shall
include all necessary personnel, labor, transportation, packaging, detailed
analyses (if required for disposal, manifesting or completing waste profile
sheets), equipment, and reports. Product and pumpable liquids removed from
the tank shall be recycled to the greatest extent practicable. The tanks
removed shall be disposed of at one of the following state approved
SECTION 02115A
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