PROPOSAL FOR
EXPEDITED REMOVAL ACTIONS
AT FORT SHERIDAN
Why are expedited removal actions being proposed for Fort Sheridan?
During the investigation and
cleanup process at Fort Sheridan, the Army identified four sites with
contaminated surface soil in small, discrete volumes. From a range of
alternatives considered by the Army, one alternative emerged as common to all
four sites:
excavation and removal. This
alternative provided early mitigation of risk and the most permanent approach
to cleaning up the four sites of all the alternatives considered. Conducting
removal actions at the sites shortens the time to achieve long-term, permanent
cleanup at Fort Sheridan. The 9 criteria set forth in the U.S. EPA “A Guide To
Preparing Superfiind Proposed Plans, Records Of Decision And Other Remedy
Selection Decision Documents” were considered in deciding on the removal and
excavation alternative and they are the following:
1. Overall
protection of human health and the environment
2. Compliance
with ARARs
3. Long-term
effectiveness and permanence
4. Reduction of
toxicity, mobility, or volume through treatment
5. Short-term
effectiveness
6. Implementability
7. Cost
8. State
acceptance
9. Community
acceptance
What sites will be the subject of removal actions?
Building 70, Vehicle Storage
Area 8 (VES 8), Coal Storage Area 3 (CSA 3) and the Water Tower Soil will have
removal actions conducted.
When will the removal
actions take place?
The removal actions will be
completed during the 2002 construction season and will be coordinated with the
construction of the caps on Landfills 6 and 7.
What will the removal
actions entail?
Contaminated soil will be
excavated from the four sites and the excavations will be backfllled with clean
soil. Estimated volumes of contaminated soil to be removed from the sites are:
1,463 yd3 from Building 70, 1,191 yd3 from VES 8, 1,250
yd3 from CSA 3 and 1,628 yd3 from the Water Tower. Two
options are available for disposing of the contaminated soil. Either the soil
will be placed in trucks and hauled to an off-property permitted landfill or it
will be used as fill at Landfill 6 or 7 under the impermeable cap.
Final disposal of the contaminated soil will
be determined in consultation with the Illinois
Environmental Protection Agency (IEPA) and
the U. S. Environmental Protection
Agency (U.S.EPA).
What cleanup standards have been selected for
each site?
Soil will be excavated from
each site until residential cleanup standards have been achieved. This means
that after completion of the removal actions, all four sites will be available
for unrestricted future land use. The cleanup standards that will be used were
determined during the remedial investigation/feasibility study (RL/FS) process.
They have been reviewed and agreed upon by the Army, the IEPA, and the U.S.
EPA.