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Special Environmental Services
Manufactured Gas Plant
Former manufactured gas plant (FMGP) activities by EERG focused
on the risk, cost and liability reduction at FMGP properties:
- MGP data management system. This database
houses an environmental standards databank
with both national and worldwide standards for soil and
ground water. It has provided better site management, eliminated
unnecessary testing and inefficient remedial options and
lowered the costs.
- DNAPL free product recovery system.
- Optimized ground water monitoring protocols
to minimize data variability due to sampling and sample
handling.
- Multi-site thermal desorption of FMGP soils
to examine the geotechnical properties of thermally treated
soil for use as an engineered backfill. This project provided
the economic and environmental benefits by secondary uses
of thermally treated soils.
- Leachability of residual contaminants from thermally
treated FMGP soils. This work was to show that
potential for contaminants to leach from thermally treated
soils to groundwater is minimal, although may be of concern
under certain conditions.
- Bioremediation and landfarming of FMGP contaminated
soils. Laboratory work was conducted that demonstrated
that some FMGP contaminants degrade under some conditions.
Field scale along with laboratory work was conducted to
examine the effectiveness of “landfarming” FMGP
soils. It examined and documented the extent to which FMGP
contaminants could be reduced to meet standards by this
technology.
- Monitored Enhanced Natural Attenuation
work has been conducted at three FMGP sites in Iowa. This
work has focused on sampling and analysis of geochemical
data and contaminant data to better understand the effects
of natural attenuation processes on MGP contaminants and
the fate of these contaminants in the environment, and to
look for evidence of degradation of contaminants under natural
conditions.
- Review of Selected FMGP Sites for Potential MNA
Implementation. This work included an in-depth
examination of site history and data collection and interpretation
of four MGP sites with a focus on data needs to implement
a natural attenuation remedial program. Current and historical
data, together with other potential responsible parties
(PRP) and adjacent property issues were evaluated to assess
potential physical and regulatory roadblocks to the implementation
of a natural attenuation program.
- FMGP liability protection systems. These
include installation of forensic monitoring wells, investigating
commingling of petroleum or other contaminants with MGP
contaminants, property boundary issues, other PRP involvement
and their share of liability, geologic characteristics of
the site, examination of evidence for groundwater contaminant
plume stability, and comparisons of current groundwater
contaminant concentrations with applicable national statewide
standards.
- Hazardous Waste Tracking System Design
was conducted for the primary use in the construction industry
and could also be implemented in environmental remediation
for hazardous waste tracking. This system helps to increase
security, accountability and cost management for FMGP projects.
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