Fact Sheet
July 2006
EPA Announces Proposed Plan and Public Meeting,
Second Street Subsite, Hastings Groundwater
Contamination Site,
Hastings, Nebraska, Operable Unit 12
INTRODUCTION
The U.S. Environmental Protection Agency (EPA) is releasing a proposed plan for a remedial action to address contaminated soils and source materials (Operable Unit 12) at the Second Street Subsite of the Hastings Groundwater Contamination Site, Hastings, Nebraska.
The Proposed Plan recommends actions that will protect human health by eliminating exposure to contaminated soils and source materials and thereby reduce migration of contaminants into the ground water.
EPA is asking for your comments on the proposed plan. Although EPA, in consultation with the Nebraska Department of Environmental Quality, is recommending an action to address the contamination, a final decision will not be made until EPA reviews comments from the public.
A 30-day public comment period will run from July 21, 2006 until
August 20, 2006. A public meeting will be held on Wednesday,
July 26, 2006 from 7:00 p.m. to 9:00 p.m. at the Hastings Public
Library. The community is invited to attend and present comments
at the meeting. Written comments will be
accepted until August 21, 2006. After all comments are evaluated,
EPA will make a decision, which will be published in a Record of
Decision.
The ROD will also include a summary of EPA's responses to the comments received during the public comment period.
THE CONTAMINANTS
Contaminants primarily are BTEX (benzene, toluene, ethylbenzene, and xylenes) and polynuclear aromatic hydrocarbons (PAHs).
ALTERNATIVES FOR REMEDIATION OF CONTAMINATED SOILS AND SOURCE MATERIALS
EPA's recommendation includes actions to prevent exposure to the contaminated soils and source materials. The alternatives for remediation include:
Alternative 1 – No Action
- To comply with guidance, no action is required as an alternative in
the Feasibility Study.
- The title defines this alternative: no action would be required to address the contaminated soils and source materials.
Alternative 2 – Upper Vadose Zone Treatment
- Excavation and thermal treatment of Holder Areas (Areas 3 & 4) and area near the railroad tracks (Area 1).
Alternative 3 – Isolation
- Installation of an impervious cap over all contaminated areas of the
subsite, including Areas 1, 3, and 4 (as above), plus the former retort area
(Area 2) and the eastern portion of the subsite (Area 5)
- Institutional controls (deed and zoning restrictions) would be implemented.
- Continue operation of soil vapor extraction (SVE) system, plus install at least one new SVE well.
Alternative 4 – Limited Treatment and Containment
- Excavation and thermal treatment of Areas 1, 3, and 4.
- Installation of an impervious cap over Areas 2, 3, and 4.
- Continue operation of SVE system, plus install at least one new SVE
well.
- Installation of an in situ chemical oxidant (ISCO) barrier along the easternmost edge of the subsite.
Alternative 5 – Treatment
- Excavation and thermal treatment of Areas 1, 3, and 4.
- Remediation of the lower vadose zone for all areas using ISCO.
- Remediation of the saturated zone (120 to 140 ft. bgs) for all areas using ISCO
The Preferred Alternative for the final remedy to address OU 12 is Alternative 5.
MARK YOUR CALENDARS
EPA and NDEQ will hold a public meeting to give the community the opportunity to make public comments on the Proposed Plan for the Second Street Subsite of the Hastings Groundwater Contamination Site, Operable Unit 12.
The meeting will be held July 26, 2006, starting
at 7:00 p.m. at the Hastings Public
Library, Fourth and Denver Streets, Hastings, NE. Written
comments must be postmarked no later than August 21, 2006, and
should be sent to:
Beckie Himes
Community Involvement Coordinator
U.S. EPA
901 N. 5th Street
Kansas City, KS 66101
himes.beckie@epa.gov
ADDITIONAL INFORMATION
The proposed plan and other subsite-related documents provide details of the nature and extent of contamination and the work that has been completed at the subsite. These documents are part of the Administrative Record, available during regular business hours at the following locations:
Hastings Public Library
4th and Denver Streets
Hastings, Nebraska
EPA Region 7
901 N. 5th Street
Kansas City, Kansas
If you have questions or need additional information, please contact:
Beckie Himes
Community Involvement Coordinator
EPA Region 7
901 North 5th Street
Kansas City, Kansas 66101
913-551-7003, Toll-free 1-800-223-0425
E-mail: himes.beckie@epa.gov
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