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64148 |
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Closed Alliance Landfill |
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Alliance |
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Public Notice Documents |
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Proposed Remedial Action/Closure |
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May 27, 2017 |
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June 27, 2017 |
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PUBLIC NOTICE
PROPOSED REMEDIAL ACTION DECISION
CLOSED ALLIANCE LANDFILL
Nebraska Department of Environmental Quality
Land Management Division
Remediation Section
Notice is hereby given pursuant to Nebraska Title 118 – Ground Water Quality Standards and Use Classification Chapter 11, that the Nebraska Department of Environmental Quality (NDEQ) is proposing final cleanup levels and remedial action at the Closed Alliance Landfill, 1439 East Kansas Street, Alliance, Nebraska. This proposed determination is in accordance with Title 118, Appendix A. The Closed Alliance Landfill is located in the Northwest ¼, Section 2, Township 24 North, Range 48 West, Box Butte County, Nebraska.
The groundwater at this site has been contaminated as a result of a release from the landfill. The NDEQ has assigned the groundwater pollution event at this site a Remedial Action Class one (RAC-1). RAC numbers are used to prioritize the groundwater pollution events with one (1) being the highest priority and three (3) being the lowest priority. The proposed final cleanup levels in the groundwater are shown in Table 1. The NDEQ is proposing the following remedial actions: landfill cap maintenance, active measures to reduce high groundwater contaminant concentrations, installation of additional monitoring wells, long-term groundwater monitoring, institutional controls, and contingency actions such as providing clean drinking water to any affected person.
Table 1. Proposed Final Cleanup Levels for the
Closed Alliance Landfill
Contaminant Concentration (µg/L)
1,1,1-Trichloroethane 200
1,1-Dichloroethane 2.4 ⃰
1,1-Dichloroethene 7.0
1,4-Dichlorobenzene 75
Benzene 5.0
Chloromethane 47 ⃰
cis-1,2-Dichloroethene 70
Dichlorodifluoromethane 98 ⃰
Tetrachloroethene 5.0
Trichloroethene 5.0
µg/L - micrograms per liter
Based on Nebraska Title 118 Maximum Contaminant Levels-MCLs; or
NDEQ Voluntary Cleanup Program (VCP) Remediation Goals-RGs ⃰
Any person may receive additional information, submit written comments regarding the proposed actions, or request a public hearing, in writing, on or before June 26, 2017. A request for hearing must state the nature of the issues to be raised and all arguments and factual grounds supporting such position. If the Director grants a public hearing, the hearing will be advertised by public notice at least 30 days prior to its occurrence. Comments and requests should be mailed to:
Mr. David Haldeman
Land Management Division
Nebraska Department of Environmental Quality
PO Box 98922
Lincoln, NE 68509-8922
The public notice, fact sheet and supporting documents are available for inspection at the Nebraska Department of Environmental Quality, 1200 N Street, Suite 400, The Atrium, Lincoln, Nebraska. These materials may also be viewed online at http://deq.ne.gov/ by selecting “Public Notices” at the bottom of the page, then clicking on “Closed Alliance Landfill,” or by accessing the Public Records search portal https://ecmp.nebraska.gov/publicaccess/viewer.aspx?&MyQueryID=340, using DEQ Facility Number 64148. Please notify the Department of Environmental Quality if alternate formats of materials are needed. Individuals requiring special accommodations or alternate formats of materials should notify the Department by calling (402) 471-2186. TDD users should call (800) 833-7352 and ask the relay operator to call the Department at (402) 471-2186. Further information may be obtained from Mike Felix, Remediation Section, (402) 471-4210.
FACT SHEET
PROPOSED REMEDIAL ACTION DECISION
CLOSED ALLIANCE LANDFILL
The Nebraska Department of Environmental Quality (NDEQ) is providing public notice of its intent to propose final cleanup levels and remedial action at the Closed Alliance Landfill, 1439 East Kansas Street, Alliance, Nebraska. This fact sheet provides background information on the site, a summary of groundwater contamination, a description of the proposed remedial action, a description of the public participation procedures, and the NDEQ contact person.
Site Location: The Closed Alliance Landfill is located at 1439 East Kansas Street in the southeast portion of town. The site covers an area of approximately 38 acres in the Northwest ¼ of Section 2, Township 24 North, Range 48 West, Box Butte County, Nebraska.
Groundwater Contamination: The groundwater at this site has been contaminated as a result of a release from the landfill. The primary contaminants of concern detected in the groundwater are volatile organic compounds (VOCs). The NDEQ compared contaminant concentrations detected in the groundwater to maximum contaminant levels (MCLs) and the Department’s Voluntary Cleanup Program (VCP) Remediation Goals (RGs) for tap water to determine the significance of the contamination. MCLs are established by Nebraska Title 118 – Groundwater Quality Standards and Use Classification.
The nature and extent of the groundwater pollution occurrence was characterized by phased investigations and by the installation and long-term sampling of groundwater monitoring wells.
Contamination at the site has migrated approximately 1,700 feet downgradient (northeast) from the northeastern corner of the closed landfill. The water table at the site is encountered in the Ogallala Formation sands which extend from beneath the topsoil to approximately 200 feet below ground surface. The Arikaree Formation underlies the Ogallala sands to a depth of approximately 475 feet below ground surface. Regionally, both the Ogallala and Arikaree aquifers area used as public and private water sources.
The main exposure pathway at the site would be ingestion of contaminated groundwater; however, there are no registered drinking water wells located within 2,000 feet of the area of contamination. One registered commercial well is located approximately 650 feet downgradient from the northeast corner of the closed landfill.
Groundwater Remedial Action Class: The NDEQ assigns a Remedial Action Class (RAC) to a groundwater contamination event to determine the importance of remedial action based, in part, on the use of the groundwater in the area (Title 118, Appendix A, Step 8). Groundwater that is being used as a public drinking water supply is assigned the highest remedial action class of
RAC-1. The Department typically requires extensive cleanup of groundwater that is classified as RAC-1. When the use of groundwater in the area is more limited, the groundwater is assigned a remedial action class of RAC-2 or RAC-3. Generally, groundwater cleanup will be less extensive for these classifications.
The pollution event for this site has been classified as a RAC-1 due to the location of the Alliance Landfill and downgradient groundwater contaminant plume being situated within the Alliance Wellhead Protection Area, thus it represents groundwater intended to be used in a drinking water supply.
The NDEQ is required to establish cleanup levels for all VOCs that have been detected at the landfill and have exceeded the proposed final cleanup levels. The proposed final cleanup levels are listed in Table 1.
Table 1. Proposed Final Cleanup Levels for the
Closed Alliance Landfill
Contaminant Concentration (µg/L)
1,1,1-Trichloroethane 200
1,1-Dichloroethane 2.4 ⃰
1,1-Dichloroethene 7.0
1,4-Dichlorobenzene 75
Benzene 5.0
Chloromethane 47 ⃰
cis-1,2-Dichloroethene 70
Dichlorodifluoromethane 98 ⃰
Tetrachloroethene 5.0
Trichloroethene 5.0
µg/L - micrograms per liter
Based on Nebraska Title 118 Maximum Contaminant Levels-MCLs; or
NDEQ Voluntary Cleanup Program (VCP) Remediation Goals-RGs ⃰
Proposed Remedial Actions: The NDEQ is proposing the following remedial actions: landfill cap maintenance, active measures to reduce high groundwater contaminant concentrations, installation of additional monitoring wells, long-term groundwater monitoring, institutional controls, and contingency actions such as providing clean drinking water to any affected person.
Landfill cap maintenance is a presumptive remedy that inhibits the formation of leachate. Long-term groundwater monitoring will assure early detection of any significant changes in groundwater conditions and demonstrate achievement of final cleanup levels within a reasonable period of time. Institutional controls prevent human exposure to groundwater contamination by prohibiting the installation of domestic water wells in the vicinity of the area of contamination. Contingency actions, including providing clean drinking water to any person whose potable water source may have been damaged by the contamination, may be necessary. An active remedial action, such as chemical oxidant or bioremediation injections in the area of highest contamination, may be necessary to shorten the time required to achieve cleanup levels to within the 20-year timeframe outlined in Title 118, Appendix A, Step 8.
Public Participation Procedures: You may receive additional information, submit written comments regarding the proposed actions, or request a hearing, in writing, on or before June 26, 2017. If you request a hearing, you must state the nature of the issues to be raised, present your arguments, and provide facts to support your position in writing to the Department. If the Director grants a public hearing, the hearing will be advertised by public notice at least 30 days prior to its occurrence. Comments and requests should be mailed to David Haldeman, Land Management Division, Nebraska Department of Environmental Quality, PO Box 98922, Lincoln, NE 68509-8922, (402) 471-2186.
Contact: The public notice, fact sheet and supporting documents are available for inspection at the Nebraska Department of Environmental Quality, 1200 N Street, Suite 400, The Atrium, Lincoln, Nebraska. These materials may also be viewed online at http://deq.ne.gov/ by selecting “Public Notices” at the bottom of the page, then clicking on “Closed Alliance Landfill,” or by accessing the Public Records search portal https://ecmp.nebraska.gov/publicaccess/viewer.aspx?&MyQueryID=340, using DEQ Facility Number 64148. Please notify the Department of Environmental Quality if alternate formats of materials are needed. Individuals requiring special accommodations or alternate formats of materials should notify the Department by calling (402) 471-2186. TDD users should call (800) 833-7352 and ask the relay operator to call the Department at (402) 471-2186. Further information may be obtained from Mike Felix, Remediation Section, (402) 471-4210.
Closed Alliance Landfill
Index of Supporting Documents
for
Proposed Remedial Action Decision
May 2017
The documents listed below may be viewed online by accessing the Public Records search portal https://ecmp.nebraska.gov/publicaccess/viewer.aspx?&MyQueryID=340, entering “64148” for DEQ Facility Number and “IWM” for DEQ Program. For additional information, questions, or to make an appointment to view public records for this facility at NDEQ offices during business hours, please contact the NDEQ Records Management Unit at (402) 471-3557.
| Document Date | Document Description | Document ID No. |
1 | June 28, 2011 | Nebraska Department of Environmental Quality (NDEQ) Internal Memorandum;
28 June 2011 Meeting Summary
| 20110043180 |
2 | November 25, 2013 | Letter from SCS Aquaterra to NDEQ;
Phase 1 Well Installation Report
| 20130082975 |
3 | January 6, 2014 | Letter from NDEQ to Larry Heinrich;
Phase 1 Well Installation Report/NDEQ comments
| 20140008718 |
4 | February 7, 2014 | NDEQ Plan;
Phase 1 Well Installation Sampling and Analysis Plan
| 20140021992 |
5 | September 19, 2014 | Letter from Jennifer Hoevet to NDEQ;
Step 7 Phase 1 Revised Sampling Schedule
| 20140070244 |
6 | January 30, 2015 | NDEQ Report;
4th Quarter 2014 Groundwater Sampling Report
| 20150008329 |
7 | May 1, 2015 | NDEQ Report;
1st Quarter 2015 Groundwater Sampling Report
| 20150032701 |
8 | July 27, 2015 | NDEQ Report;
2nd Quarter 2015 Groundwater Sampling Report
| 20150053629 |
9 | October 28, 2015 | Letter from NDEQ to Ed Tvrs;
Request Additional Step 7 Assessment Activities and Field Work Plan
| 20150054247 |
10 | December 7, 2015 | Letter from SCS Aquaterra to NDEQ;
Step 7 Phase II Monitoring Well Installation Work Plan
| 20150081634 |
11 | December 23, 2015 | Letter from NDEQ to Edward Tvrs;
Step 7 Phase II Monitoring Well Installation Work Plan/NDEQ Comments
| 20160002974 |
12 | June 15, 2016 | NDEQ External Memorandum;
Monitoring Well Access Agreements
| 20160075668 |
13 | November 1, 2016 | NDEQ Report;
3rd Quarter 2016 Well Installation and Groundwater Sampling Report
| 20160068276 |
14 | December 5, 2016 | NDEQ Internal Memorandum;
Title 118 Meeting Summary
| 20160075666 |
15 | January 27, 2017 | NDEQ Report;
4th Quarter 2016 Well Installation and Groundwater Sampling Report
| 20170008202 |
16 | January 31, 2017 | NDEQ Internal Memorandum;
Remedial Action Classification Determination
| 20170012788 |
17 | February 3, 2017, 1993 | NDEQ External Memorandum and Letter to Ed Tvrs;
Remedial Action Class Designation and Preliminary Cleanup Levels
| 20170011051 |
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