Remediation activities at the Fernald Environmental Management Project (FEMP) Page: 3 of 11
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Operable Unit 2
OU2 at the FEMP consists of a former solid waste landfill, two fly ash piles, two sludge disposal ponds, and
a construction rubble disposal site (Figure 4). The ROD signed by U.S. EPA in 1995 lists the general
cleanup method to include excavation of the waste materials from all of the areas. The excavated areas will
be backfilled with soil and reseeded. The wastes excavated and removed from the areas will be placed in
a disposal facility intended to be built on the FEMP site. The RDWP for OU2 is scheduled for approval in
In addition, OU2 initiated a CERCLA removal action in 1995 to control seepage from the inactive fly ash
pile and the construction rubble site. The seepage drains to a collection basin and is pumped to the site's
advanced wastewater treatment system to treat both chemical and radiological contaminants.
Operable Unit 3
OU3 includes all of the buildings and structures (including process and storage tanks) within the former
production area of the FEMP complex (Figure 5). In 1994, an interim ROD for OU3 was signed by U. S.
EPA. The interim ROD (IROD) described the general methodology intended to be used to address the
removal of the structures within the process area. The IROD was developed since the removal of
deteriorating buildings and structures could hasten the cleanup process at the FEMP.
The IROD was approved by U.S. EPA in 1994 before the Remedial Investigation/Feasibility Study (RI/FS)
for OU3 was completed. Removal of holdup material and building decontamination/demolition activities
continued during the RI/FS process.
The IROD also presented the concept that some existing CERCLA removal actions would continue over
the next several years. Ordinarily under CERCLA. removal actions cease when RODs are signed since
remedial actions are ultimately the solution to the contamination problems at the site.
Under the IROD however, the FEMP continues to use several removal actions to remove materials from
former process equipment and treat existing hazardous waste streams. During 1995, three hazardous waste
streams stored in tanks at the FEMP were treated to render the waste streams as non-hazardous. The
treatments included neutralization, precipitation, and stabilization using a solidification process. Filtercake
from the wastewater treatment processes along with the solidified waste stream will be shipped to an off-site
Also, under the IROD activities the removal of holdup material present inside former process equipment
continued as a removal action. The IROD called for the submittal of implementation plans to U.S. EPA
describing the decontamination and demolition activities of specific buildings/structures at the FEMP. U.S.
EPA would approve the implementation plans before any demolition activities on the appropriate building
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Walsh, T.J. & Danner, R. Remediation activities at the Fernald Environmental Management Project (FEMP), article, July 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc664970/m1/3/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.