TRANSPORTATION RESEARCH BOARDonlinepubs.trb.org/onlinepubs/webinars/170912.pdf2017/09/12 ·...
Transcript of TRANSPORTATION RESEARCH BOARDonlinepubs.trb.org/onlinepubs/webinars/170912.pdf2017/09/12 ·...
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Tuesday, September 12, 2017
2:00pm to 3:30pm ET
Use and Potential Impacts of Aqueous Film-Forming Foams at Airports
TRANSPORTATION RESEARCH BOARD
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Purpose
Discuss ACRP Report 173: Use and Potential Impacts of AFFF Containing PFASs at Airports.
Learning Objectives At the end of this webinar, you will be able to:
• Understand the potential risks associated with PFASs,
especially with respect to AFFF. • Identify the best AFFF management practices for managing
AFFF and addressing PFAS-related environmental impacts • Discuss the MAPA Screening Tool
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ACRP is an Industry-Driven Program
✈ Managed by TRB and sponsored by the Federal Aviation Administration (FAA).
✈ Seeks out the latest issues facing the airport industry.
✈ Conducts research to find solutions.
✈ Publishes and disseminates research results through free publications and webinars.
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Opportunities to Get Involved!
✈ ACRP’s Champion program is designed to help early- to mid-career, young professionals grow and excel within the airport industry.
✈ Airport industry executives sponsor promising young professionals within their organizations to become ACRP Champions.
✈ Visit ACRP’s website to learn more.
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Upcoming ACRP Webinars
September 14 Understanding Stormwater Management
Requirements for Airports
October 17
Advancing the Aviation Industry Workforce
November 1 Assessing Community Annoyance with
Helicopter Noise
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Additional ACRP Publications Available on this Topic
Synthesis 24: Strategies and Financing Opportunities for Airport Environmental Programs Synthesis 44: Environmental Management System Development Process Report 43: A Guidebook for Improving Environmental Performance at Small Airports Report 135: Understanding Air Quality and Public Health Studies Related to Airports
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Today’s Speakers
Andrew Thalheimer and Indra Kalinovich Dillon Consulting Limited
Presenting Report 173 Use and Potential Impacts of Aqueous Film-
Forming Foams (AFFF) Containing Per- and Polyfluoroalkyl Substances (PFASs)
at Airports
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ACRP Research Report 173: Use and Potential Impacts of AFFF Containing Per- and Polyfluoroalkyl
Substances (PFASs) at Airports
Andrew Thalheimer, P.Eng.
Indra Kalinovich, PhD, EIT, C.Chem Dillon Consulting Limited
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Why ACRP 02-60?
The Dayton Daily News| Sep 12, 2016 Firefighting Foam linked to water contamination, injuries under fire
NBC News | May 17, 2016 US Air Force to change fire forms due to water contamination near Colorado Springs
UC Berkeley News| Aug 9 2016 Cancer-causing chemical in drinking water traced to fire-fighting foam
NBC News | May 17, 2016 Toxic chemical linked to firefighting foam found in Bay Area water
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ACRP 02-60 Research Program Research Objective:
Develop a reference document geared for airport laypersons on what is currently known and not known about PFASs and their use in AFFF at airports.
Research Components: • Primer
Survey Screening Tool Sampling and Analysis for PFASs Assessment AFFF Alternatives Remediation Options Evaluation Recommendations for Further Research
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Research Methodology
Definition of Life Cycle
Compiling Data from
Literature & Survey
Development of Screening
Tool
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AFFF Lifecycle Stages at an Airport 5
Procurement Storage
Maintenance
Use/Testing
Training
Discharge to Environment
Containment
Treatment/ Off-Site Disposal
Application Disposal Procurement Storage
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Airport Survey Goals
• Ascertain management practices for AFFF life-cycle stages
• Determine best management practices for preventing spills
• Understand how airports are addressing legacy environmental impacts
• Assess awareness of alternative formulations of AFFF
DISTRIBUTION OF RESPONSES BY AIRPORT SIZE CATEGORY
Unduplicated Valid Sample
Completed Interviews
Percent of Sample
Category A 48 40 83%
Category B 29 22 76%
Category C 90 69 77%
Category D 28 19 68%
Category E 30 17 57%
Total 225 167 74%
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Primer
“Firefighter training in Djibouti, August 2011” by US Army Africa is licensed under CC BY 2.0
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What are PFASs? Unique Properties:
Functional Group (e.g., carboxylate, sulfonate)
Alkyl chain (of C-F atoms), typically 2 to 16 carbon atoms
• Carbon-Fluorine Bond • Dual Nature • Chain Length
• Pre-cursors • Co-Mingling • Low Vapour Pressure
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Contaminant Levels time
Biomagnification
Bioaccumulation
Environmental Concerns Persistance
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Toxicological Properties
• Readily Adsorbed via Ingestion • Slow Elimination • Accumulate in Blood, Kidney, Liver • Potential Developmental, Reproductive and
Systemic Effects • Potentially Carcinogenic – High Correlation
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Where do PFAS come from?
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AFFF MANAGEMENT WITHIN AIRPORT
OPERATIONS
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AFFF Lifecycle Stages at an Airport 13
Procurement Storage
Maintenance
Use/Testing
Training
Discharge to Environment
Containment
Treatment/ Off-Site Disposal
Application Disposal Procurement Storage
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Procurement 14
MOST IMPORTANT CRITERIA FOR AFFF PROCUREMENT
Percent
Compliance with Government Regulations 66
Cost or Price 37
Handled by a Purchasing Agent/Other Agency 8
Availability of Sufficient Quantities 7
Required to Use a List of Vendors provided by the Military/DOD/State/City 7
Consistency of Brand to Avoid Mixing Brands and Resulting Compatibility Issues 4
Availability In a Timely Manner 3
Environmental Considerations 2
State of the Practice
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Procurement Best Management Practices
• U.S.: 14 CFR Part 139, FAA Guidance Documents, US EPA PFOA Stewardship Program, MIL-SPEC (MIL-F-24385)
• Canada: Canadian Aviation Regulations (SCC: CAN/ULC-S560-06, Std. Category 3 AFFF Liquid Concentrate), Perfluorooctane Sulfonate and Its Salts and Certain Compounds Regulations
Comply with Legislation, Regulation
and/or Guidance
•Meet Firefighting Foam Performance Standards in your country •Is a 3% or 6% foam concentrate AFFF Performance
• Do not purchase PFOS-based AFFF • Do not use AFFF that has >=C8 fluorotelomers • Select AFFF that contains C6-based fluorotelomers where available
Environmental Considerations
• Determine compatibility of concentrate with existing equipment • Check compatibility of any new foam with previous foam type/batch • Select 3% foam concentrates when compatibility with equipment allows
System and Equipment Compatibility
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AFFF Lifecycle Stages at an Airport 16
Procurement Storage
Maintenance
Use/Testing
Training
Discharge to Environment
Containment
Treatment/ Off-Site Disposal
Application Disposal Procurement Storage
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Storage
3.89 3.86
3.16 1.47
3.84 1.04 1.09
0 1 2 3 4 5
Are Enclosed
Are Covered
Are Single Containment
Are Double Containment
Have a Cement or Concrete Floor
Have an Earth or Gravel Floor
Are in Underground Storage Tank
Means
State of the Practice
Double Containment: 82.5% of Category A airports do NOT use double containment, where 21.1% of Category D airports DO use double containment.
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Storage Store in Specific Types of Storage Containers •Recommended container types (original shipping container, drums, double walled ASTs) •Recommended materials (double-walled stainless steel, high density cross-linked polyethylene, reinforced fiberglass polyester with a vinyl ester resin)
•Labeled containers with type and concentration of AFFF
Store Under Specific Conditions •As prescribed in a product information sheet (sealed, secured, within specific temperature range)
•In a facility/environment designated and designed for storage (roofed/sheltered, bunded storage, on level ground, etc.)
Store Reserve Quantities •As directed by the FAA or Transport Canada
Best Management Practices
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19
Procurement Storage
Maintenance
Use/Testing
Training
Discharge to Environment
Containment
Treatment/ Off-Site Disposal
Application Disposal Procurement Storage
AFFF Lifecycle Stages at an Airport
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Application - Handling
92.2 95.2
37.7 40.7
88 79 81.1
0 20 40 60 80 100
Eye ProtectionWork GlovesNitrile Gloves
Other One-Time-Use GlovesSafety Boots
Fire-Retardant ClothingTurnout Gear
Percent Yes
State of the Practice
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Application - Spill Prevention Use Caution/Attend To Detail 22% Use Containment/Containers 22 Provide Thorough Training On Procedures 16 Make Sure Connections Are Correct/Are Tight 16 Follow Procedures 16 Use Pumps 12 Have Clear Procedures/Checklists 12 Use The Right Equipment/Make Sure Equipment Is Set Up Properly 11 Do Not Do It Alone/Involve Multiple People 10 We Have Never Had An Issue or Problem/We Don’t Spill 8 Use Safety Gear 8 Work In A Contained Area/ Closed Area/Safe Area 8 Make Safety A Priority/Use Safety Precautions 5 Maintain Trucks Well/Maintain Equipment Well 4 Make People Aware That The Goal Is Not To Have A Spill 4 Use A Closed System 4 Have Absorbent Material Available 4 Make Sure Spill Containment Is Available If Needed 1 Make People Aware Of The Foam’s Cost 1
Procedures Engineering Controls Training & Awareness
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Application - Training State of the Practice
72.3% 4.7%
23.0%
Extent to which AFFF Has Been Used in Training
Exercises
Select ExercisesAll ExercisesNo Exercises
78.9%
21.1%
Disposition of the AFFF Used in Training
Discharged Containment System
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Application – Foam Testing State of the Practice
Foam Testing is unilaterally conducted at airports, and most testing uses AFFF. Over 50 % of airports surveyed reported testing frequency as between every six months to once per year.
Yes 97.60%
No 2.40%
Extent to Which Airports Conduct Foam Tests
69.30%
30.70%
Disposition of the AFFF Used in Foam Tests
Discharged Containment System
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Application - Use
NUMBER OF TIMES AFFF HAS BEEN USED TO FIGHT FIRES IN THE PAST TEN YEARS
Frequency Percent
1 15 12.6
2 18 15.1
3 17 14.3
4 7 5.9
5 15 12.6
6 to 10 29 24.3
More than 10 18 15.0
Yes 71%
No 29%
Extent to Which AFFF Has Been Used at
Airports for Firefighting Purposes
State of the Practice
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Application Best Management Practices
• Staff Awareness of PFASs and AFFF • Train staff and follow industry-recommend procedures.
Handling
• Follow prescribed training schedule that aligns with appropriate guidelines and regulations.
• Prepare in advance for training sessions. • Use propane in lieu of flammable hydrocarbons. • Consider alternative foam products for training. • Regional training facilities and designated training areas (with containment,
disposal methods, away from drainage facilities or water bodies)
Training
• Conduct groundpattern tests first with water (to ensureset-up). • Discharge the minimum volume of AFFF needed to test the system. • Collect discharge for storage and disposal. • Develop and employ Safety Spill Plan
System and Equipment (& Foam) Testing
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Application Best Management Practices
• Incorporate containment systems into hangars, FFTAs and tarmac that capture and direct any discharged AFFF away from sensitive receptors in the environment.
Engineered Containment Systems
• Follow industry recommended practices (NFPA 402,403) • Trained and prepared personnel, with proper protective
equipment • Improve communication and response between environmental
personnel and firefighting personnel • Spill response team should be nearby to provide preliminary
containment and conduct clean-up activities as soon as practicable following emergency.
• Fire fighting team should alert environmental when deploying, moving, and/or testing AFFF.
Aircraft Rescue & Emergency Response
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27
Procurement Storage
Maintenance
Use/Testing
Training
Application Procurement Storage
Discharge to Environment
Containment
Treatment/ Off-Site Disposal
Disposal
AFFF Lifecycle Stages at an Airport
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Disposal State of the Practice
1 2 3 4 5
Using an On-Site Wastewater ManagementSystem
Using a Municipal Sewer System
Using a Wastewater Management Contractor
Transporting It to a Landfill
Incinerating It
Letting It Infiltrate into the Soil
Means
Never Rarely Sometimes Usually Always
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Compliance with Legislation, Regulation, and/or Guidance
Discharge Disposal
Industry recommended
practices (wastewater
treatment, fuel-water separator)
Removal from Equipment or Systems
Handling protocol (flushing
equipment, PPE)
Disposal at an authorized location.
Stockpile Disposal
United States – Specific facilities,
incineration
United States – Specific facilities,
incineration
Canada – Facilities with Certificates of Approval, have
operating permits from the
Province/Territory
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Procurement
• Comply with Legislation, Regulation, and /or Guidance
• Foam Performance Standards
• Understand System and Equipment Compatibility
• Evaluate Environmental Considerations
Storage
• Store in Specific Types of Storage Containers
• Store Under Specific Conditions
• Store Reserve Quantities
Application
• Follow Safe Handling Procedures
• Mitigate Potential Effects Following Aircraft Rescue
• Reduce the Potential Effects During Training
• Reduce the Amount of Discharge as a Result of Equipment and System Testing
• Mitigate through Aircraft Hangar Design
Disposal
• Follow Guidance on Discharge Disposal
• Follow Protocol to Remove from Equipment or Systems
• Comply with Legislation, Regulation, and/or Guidance on the Disposal of Stockpiles
Summary of Best Management Practices for Managing AFFF
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MANAGING LEGACY PFAS IMPACTS
Procurement Storage
Maintenance
Use/Testing
Training
Discharge to Environment
Containment
Treatment/ Off-Site Disposal
Application Disposal Procurement Storage
Discharge to Environment
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Managing Legacy PFAS Sites
Good Data Collection
Sound Laboratory Analysis
Develop Robust CSM
Manage to Current Regulations (Risk Management and Remediation)
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Good Data Collection PFAS Sampling: Challenges & Mitigation
Stratification • Low-flow purging and sampling procedures
• No filtration before laboratory analysis
Sticking
• Sampling equipment and sample containers
Cross-Contamination • Sampling equipment and sample containers
• Drilling water/hydroexcavation
• Field equipment decontamination and PPE/field clothing
• Food packaging
Transformation and Degradation
• Sampling frequency
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Legacy Impacts: Best Practices
Sampling
• Use low-flow purging and sampling procedures.
• Do not filter samples prior to laboratory analysis.
• Use laboratory provided sampling containers specifically for PFAS sampling to reduce risk of “sticking”.
• Utilize specific sample collection protocols to reduce risks of cross-contamination.
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Sound Laboratory Analysis PFAS Analysis: Challenges & Mitigation
Laboratory Standards • Suitable standard methodology to carry out PFAS analyses
Branched and Linear Isomers
• Include data that addresses both ‘versions’
Precursors • Currently, no commercially available method for precursor analyses. New methods are in development
Quality Assurance & Quality Control
• Review laboratory provided information
Accreditation • Accredited for PFAS analyses by a reputable accreditation agency
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Legacy Impacts: Best Practices
Analysis
• Use a laboratory accredited for PFAS analyses by a reputable accreditation agency.
• Ensure laboratory is using suitable standard methodology to carry out PFAS analyses.
• Include data that addresses both branched and linear isomers.
• Currently no commercially available method of precursors analyses but new methods are in development.
• Review laboratory provided quality assurance and quality control information.
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Develop Robust Conceptual Site Model (CSM)
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Legacy Impacts: Best Practices
Develop Robust CSM
• Develop Conceptual Site Model (CSM)
• Identify source areas (e.g., storage areas, training/testing areas, etc.)
• Identify and evaluate exposure pathways (e.g., human health, ecological, lateral/vertical migration).
• Identify receptors (e.g., surface water bodies, fish, human, etc.)
• Adopt risk management strategies that intercept the exposure pathway between source term and receptor
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Risk Management
• Manage to current regulatory requirements.
• Eliminate direct contact to impacted soil and limit infiltration.
• Eliminate surface water runoff.
• Require workers to don appropriate PPE.
• Prohibit potable groundwater or surface water should a potable source be suspected of being impacted.
Strategies
Source Exposure Pathway
Receptor
Potential Risk
No Risk
No Risk No Risk
No Risk No Risk
No Risk
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Remediation
Develop decision model to support the choice of short-term and long-term remediation strategies.
Impacted Soil
High-temperature incineration or landfill
disposal at a facility that is appropriately designed to
treat and handle PFAS impacted soils
Immobilization/stabilization (e.g., amine-modified clay
sorbents).
Impacted Groundwater
Pump and treat (e.g., using activated carbon, ion
exchange resin, coagulation, membranes)
Permeable Reactive Barrier
Disposal of Discharged AFFF
Collect and contain discharged foam.
Pre-treatment may be required prior to acceptance at a
wastewater treatment facility.
There is no simple remedial solution.
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ALTERNATIVES TO AFFF
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Alternatives to AFFF Best Management Practices
Upgrade to modern AFFF o Regulations in U.S. and Canada place restrictions on production of AFFF containing PFAS.
o Existing stocks of PFOS-based foam removed from service but regulations in U.S. do not currently restrict use of existing stocks.
Use of Fluorine-Free Foams
• Formulated without the use of fluorochemicals and does not break down to PFOS and PFOA.
o Made of water-soluble non-fluorinated polymer additives
o Considered biodegradable, low in toxicity and treatable in sewage treatment plants.
Optimization of Firefighting Program
o Ensure plans for each life cycle stage minimize the potential for accidental release of AFFF.
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SCREENING TOOL
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MAPA Screening Tool
• Objective: To identify areas of potential concern on or near an airport, accounting for both historical and current use of AFFF and other sources of PFASs.
• Designed to be easy to use, based upon readily available information.
• Facilitates communication of outcomes to airport management.
• Supports evaluation of BMP implementation to prioritize resource allocation/investment.
(MAPA = Managing AFFF and PFAS at Airports)
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Phase PHASE 1 Scale Airport Questions to be Answered
Do I have concern? Where are the Potential Areas of Concern?
Task Objectives Identify Areas of Potential Concern at Airport Identify Potential Sensitive Receptors
Considerations Airport AFFF Life Cycle Historical Activities Current AFFF Use Uncontrolled Spills/Releases Other PFAS Sources Potable Wells Surface Water Bodies Wetlands
Outcomes Identifying whether PFAS is concern AFFF life-cycle schematic Map showing areas of concern and sensitive receptors at airport Categorization of areas of concern as operational versus legacy Source-based preliminary rating index
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Phase PHASE 2 Scale Operational Area of Concern
(e.g., Storage Units, Equipment, Distribution Infrastructure)
Legacy Area of Concern (e.g., FFTA, Release/Disposal Area, Incident Response)
Questions to be Answered
How big of a concern do I have? What types of PFASs do I have? What additional information do I need to understand the potential magnitude of the concern? Where should I start? What represents the greatest risk? What are the priorities for future action given limited resources?
Task Objectives Assess Magnitude of Issue Identify AFFF Handling, Storage, Preparation, Disposal Practices Identify Equipment and Distribution Infrastructure Maintenance and Cleaning Practices
Assess Magnitude of Issue Identify Potential Pathways and Site Features Salient to PFAS Fate and Transport
Considerations AFFF Volume AFFF Procurement Frequency AFFF Shelf Life and Disposal AFFF Storage System AFFF Preparation Process Equipment Cleaning Practices Planned Capital Improvements Involving Soil Excavation or Groundwater Dewatering
Surface Water Drainage and Conveyance Systems Types and Extent of Surface Covering Topography Meteorological conditions Presence of Permafrost Geology (if known) Hydrogeology (if known)
Outcomes Compilation of Identified PFAS Related Issues Identification of Data Gaps Prioritization of Area of Concern
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Screening Tool: Outcomes • Whether an airport has a potential concern that needs
to be explored
• Where specific areas of potential concern are present and the nature of these areas
• What data gaps may be present in characterizing the potential severity (i.e., risk) associated with each area
• Priorities of future actions where more than one area may be present.
• Priorities for resource commitment.
• Planning of capital infrastructure and airport development.
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RECOMMENDATIONS FOR FUTURE RESEARCH
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Recommendations for Future Research
• Alternatives to AFFF containing PFAS
• Disposal Methods (of AFFF Concentrate)
• Replacing AFFF in Existing Systems
• Environmental Standards for AFFF
• Evaluation of Existing Separation/Treatment Facilities for Processing PFAS-Impacted Wastewater
• Understanding how firefighting can be optimized
• Broadly Applicable Analytical Methods
• Environmental and Human Health Risks Associated with short-chain PFASs in AFFF
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Questions?
Andrew H. Thalheimer, P.Eng Dillon Consulting Limited
Halifax, NS [email protected]
Indra K. Kalinovich, PhD, EIT, C.Chem. Dillon Consulting Limited
Winnipeg, MB [email protected]
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Today’s Participants • Michael Lamprecht, Federal Aviation
Administration, [email protected]
• Andrew Thalheimer, Dillon Consulting Limited, [email protected]
• Indra Kalinovich, Dillon Consulting Limited, [email protected]
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Panelists Presentations
http://onlinepubs.trb.org/onlinepubs/webinars/170912.pdf
After the webinar, you will receive a follow-up email
containing a link to the recording
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Get Involved in ACRP • Submit a research idea to ACRP. • Volunteer to participate on a project panel. • Prepare a proposal to conduct research. • Get involved in TRB's Aviation Group of
committees. • Take part in the Champion or Ambassador
Programs.
For more information: http://www.trb.org/acrp/acrp.aspx
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Take Part in the Careers in Motion Networking Fair
http://bit.ly/CareersInMotionFair