Engineered
Soil Excavation
Cost effective site remediation is often closely tied to "smart" excavation and
soils treatment and disposal management. ART is experienced and
creative in determining cost effective solutions regarding an
"engineered" excavation, soils treatment options, waste classification
and disposal management. ART will prepare project specific excavation
plan, materials handling plan, soil treatment and a soil
disposal plan. Soil excavated from each area is managed
separately for either on-site soil treatment, stabilization and/or
direct disposal for maximum project cost savings. ART can also provide
on-site project management.
| Example 1: Bend Trap Club
For the Bend Trap Club site remediation, the goal was to
complete the remediation to residential standards for Lead, Arsenic and
Polynuclear Aromatic Hydrocarbon (PAH). During initial treatability
study performed by ART is was concluded that the lead pellets could be
effectively removed from lead-only impacted soils
to meet residential cleanup levels for soil after treatment. However,
for soils impacted by Lead pellets and PAH,
residential standards could not be achieved for PAH. As these soils
were characteristically hazardous (exceeding TCLP regulatory limit for
Pb), these soils were excavated selectively, stabilized and
disposed at a permitted landfill. The selective excavation and
stabilization provided significant cost savings.
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Excavation Sequence & Soil Management Plan
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Example 2:
Springfield Township Superfund Site
At the Springfield Township
Superfund Site, ART provided
selective excavation, soils management, soil washing and direct soil
disposal.
The excavation plan and excavation sequence was developed based on
available
site data. TSCA hazardous soils were processed through soil washing and
cleaned
soil was used for backfill. The filter cake residue (containing PCBs
and metals) was shipped to a TSCA
permitted landfill. Selectively excavated non-TSCA regulated soils
containing low level of PCB and lead paint residue were classified and
disposed as non-hazardous waste. This selective soils excavation and
management approach resulted in significant cost savings to the project.
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| Example
3: Vineland Chemical Superfund Site
For the Vineland Chemical Superfund Site, ART
provided a
detailed soil excavation, soils management and blending plan to provide
a constant feed within design parameters of the soil treatment plant.
This approach resulted that all soils including "Hot Spot" areas were
amenable to soil treatment. This approach provided significant project
cost savings over direct disposal of "Hot Spot" soils.
The filter cake residue resulting from the soil
washing operation was disposed at a permitted landfill.
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Excavation Sequence & Blending Plan
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