Details for AFCEC/CZOM Restoration Support - Ad from 2021-06-08

Request for Public Document Review
Engineering Evaluation and Cost Analysis
Non-Time Critical Removal Action for
Perfluorooctanoic Acid and Perfluorooctane Sulfonic Acid
In Residential Wells near Ellsworth Air Force Base
(Environmental Restoration Program)
The U.S. Air Force will conduct a non-time critical removal action to address the releases from the use of
aqueous film forming foam (AFFF) during USAF firefighting activities. While AFFF was used in accordance with
manufacturer guidelines, it contained perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS)
that are a likely potential contamination source of groundwater used as a drinking water source for residences
near Ellsworth Air Force Base, South Dakota. In 24 privately-owned wells, concentrations of PFOS and PFOA
are greater than U.S. Environmental Protection Agency (EPA) lifetime health advisory (HA) action levels. These
exceedances of the Lifetime HA action levels prevent the residents from using their wells for potable water and
triggered the need for this action.
This engineering evaluation and cost analysis (EE/CA) identifies the removal action objective, evaluates
potential alternatives for conducting the removal action, and recommends which alternatives should be
implemented to achieve the removal action objective. This proposed action will protect human health from
exposure to PFOS and PFOA in drinking water at concentrations in excess of the EPA Lifetime HA action levels.
The U.S. Air Force is seeking public participation, review, and comment on this evaluation. The EE/CA
document, as well as additional information, is available on the Air Force Civil Engineer Center Administrative
Record website:
The 30-day public comment period is from June 8, 2021 through July 9, 2021. Comments must be
postmarked or emailed by July 9, 2021.
Comments and questions should be directed to:
Ms. Rita Krebs
2125 Scott Drive
Ellsworth AFB, SD 57706
Phone: (605) 385-2688

(Published one time at the approximate cost of $141.65)