Drinking Water Alternatives for the Community of Moose Creek, AK - - PowerPoint PPT Presentation

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Town Hall Meeting:

Drinking Water Alternatives for the Community of Moose Creek, AK Eielson AFB

1 Dec 2016

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Goal and Purpose

Goal:

 The Air Force goal is to protect human health and ensure mission

activities do not impact the installation and the supporting communities' access to safe drinking water.

 We are committed to being transparent and maintaining open

dialogue with communities, regulators and other stakeholders.

Purpose:

 Present potential alternatives for a long-term drinking water

source for the community of Moose Creek

 Seek feedback on alternatives so we can understand your

concerns

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Agenda

 Introductions  Update on Air Force response actions  Alternatives for long-term drinking water supply for the

Community of Moose Creek

 Timeline and future opportunities for public participation  Questions?

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AF Response Status

 169 properties exceed EPA’s lifetime health advisory for

PFOS/PFOA

 As of 1 Nov 2016, the AF has installed and is operating:  90 Water Tanks with delivery service  67 Granular Activated Carbon (GAC) Treatment Systems  9 properties are awaiting system installations (4 w/agreements)  Moose Creek Apartments expected to be complete by Fall

2017

 Coming Soon  System satisfaction surveys (Jan 2017)  System operation agreement renewals (Jan 2017)

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Engineering Study

 Objectives  Evaluate the feasibility of long-term water supply alternatives  Prevent ingestion of PFOS/PFOA-contaminated water that

exceeds EPA’s lifetime health advisory of 0.07 ug/L

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Moose Creek Study Area

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Moose Creek Study Area

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Long-Term Options

 EPA guidance recommends considering the following general

categories:

 Status Quo (baseline)  Connection with an existing municipal or private supply  Develop new uncontaminated water resources  Removal of contaminants via treatment

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Status Quo

 The “Status Quo” response consists of keeping the currently

installed systems at each property

 Air Force is responsible for long-term O&M, system monitoring

and water delivery

 The “Status Quo” alternative is included as a baseline for

evaluation of other alternatives

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Connection to Existing Supply

 “Municipal” drinking water supplies available near Moose Creek  Alternative 1 – Water main extension from North Pole  Alternative 2 – Water main extension from Eielson AFB  Private drinking water sources near Moose Creek  Alternative 3 – Individual water tanks with water truck delivery

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Alternative 1 NP Water Main Extension

 New main from North Pole to Moose Creek  New local distribution system, one service connection per

property

 New local reservoir and pump station (location to be identified)  Decommission existing wells  Land Use Controls (LUCs)  Water supply and distribution would become responsibility of

North Pole Water and Sewer Utility

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Alternative 1 NP Water Main Extension

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Alternatives 1,2,5 Local Distribution Concept

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Alternative 2 EAFB Water Main Extension

 New water main from Eielson AFB to Moose Creek  New local distribution system, one service connection per

property

 New local reservoir and pump station (location to be identified)  Decommission existing wells  Land Use Controls (LUCs)  Water supply would be responsibility of the Air Force  Distribution system may be operated by private company

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Alternative 2 EAFB Water Main Extension

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Alternatives 1,2,5 Local Distribution Concept

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Alternative 3 Individual Water Tanks

 This option has been implemented at a majority of properties in

Moose Creek

 Consists of replacing all GAC systems currently in place with

tanks

 Delivery service by water truck  Decommission existing wells  Land Use Controls (LUCs)  Water supply would be responsibility of the Air Force

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Develop Uncontaminated Supply Category

 Groundwater currently serviced by wells <100 ft deep  Testing has shown water at >200 ft is uncontaminated

Alternatives under this category:

 Alternative 4 – New Individual Deep Well per property  Alternative 5 – New Deep Well to serve Community

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Alternative 4 Individual Deep Wells

 Install a new well, approximately 200 feet deep, at each property  Decommission existing wells  Implement Land Use Controls (LUCs)  Property owners operate new wells

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Alternative 5 Develop New Community Well

 New well and water treatment facility built at Moose Creek  New local reservoir and pump station (location to be identified)  New local distribution system, one service connection per

property

 Decommission existing wells  Implement Land Use Controls (LUCs)  Water supply and distribution system may be operated by private

company or City of North Pole

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Alternative 5 Develop New Community Well

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Alternatives 1,2,5 Local Distribution Concept

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Removal of Contaminants via Treatment Category

 Treatment technologies to remove PFOS and PFOA have been

investigated

 Granular activated carbon has proven to be a very effective

technology to treat domestic water

 Reverse osmosis has been shown to be effective in studies

Alternatives under this category:

 Alternative 6 – Individual GAC treatment

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Alternative 6 Individual GAC Treatment

 This option has been implemented at some properties in Moose

Creek

 Replace water tanks already installed with individual GAC

treatment systems

 Decommission existing wells  Implement Land Use Controls (LUCs)  AF responsible for long-term O&M and system monitoring

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Alternative Summary

 Status Quo – Keep Existing GAC Systems and Tanks  Alternative 1 – NP Water Main Extension  Alternative 2 – EAFB Water Main Extension  Alternative 3 – Individual Water Tanks with Delivery  Alternative 4 – Individual Deep Wells  Alternative 5 – Develop New Community Well  Alternative 6 – Individual GAC Treatment

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Timeline and Public Participation

 Study (Interim Feasibility Study or IFS) is being conducted under

CERCLA

 Will be followed by an Interim Proposed Plan (IPP) and Interim

Record of Decision (IROD)

 Draft IFS – Jan/Feb 2017  Draft IPP – Aug 2017  Draft IROD – Mar 2018  Public Participation Opportunities  Additional Public Meeting at the IPP phase  30-day Public Comment periods on Draft IFS, Draft IPP, Draft

IROD

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More Information

Eielson AFB Environmental Site http://www.eielson.af.mil/info/environmental.aspx MC Information Repository Site http://alaskacollection.library.uaf.edu/eafbsc/cd0/Moose%20Creek% 20PFCs%20Contamination%20Information%20Repository/ Air Force Civil Engineer Center http://www.afcec.af.mil/Home/Environment/Perfluorinated- Compounds/ Environmental Protection Agency www.epa.gov/ Agency for Toxic Substances and Disease Registry www.atsdr.cdc.gov/

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Questions?