Download - Heather Dylla - Measuring Sustainability
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1 © Copyright 2012 Daniel J Edelman Inc. Intelligent Engagement
Measuring Environmental Sustainability
Heather DyllaDirector of Sustainable
Engineering
2014 CalAPA Spring Asphalt Pavement Conference & Equipment Expo
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Outline
• What does it mean to be “Sustainable”?
• Why do we need to quantify our environmental impact?
• How do we measure our environmental impact?• Green Rating Metrics
• Life Cycle Assessments
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Definition of Sustainable
Sustainable“Meets the needs of the present without compromising the ability of future generations to meet their own”1
Sustainable Pavements?No universal definition
“Triple Bottom Line”
Environmental
EconomicSocial
1 UN World Commission on Environment and Development
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Sustainable Asphalt Pavements
Societal• Safe• Quiet• Smooth Ride Quality
• Minimizes User Delay
• Natural Resource Conservation
Economic• Virgin Material Reuse/Replacement
• Reduced Fuel• Improved Durability
• Long Life
Environmental• Storm Water Runoff
• Water Treatment• Reduce Emissions• Reduce Landfill
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Sustainable Asphalt Technologies
Reclaimed Asphalt Pavement (RAP)
Ground Tire Rubber (GTR)
Recycled Asphalt Shingles (RAS)
Porous Asphalt
Warm Mix Asphalt (WMA)
Perpetual Asphalt Pavement
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Why do we need to quantify our environmental impact?
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New Era of Product Transparency
Increasing need for quantifying a product’s
impact towards sustainability
• Growing Public Demand for Sustainability
• Adds Credibility to Green Marketing
• Environmental Benchmarking
• Potential Tool for Pavement Selection
If we don’t do it, someone else will do it for
us!
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Growing Public Demand
81% Executive Corporate Leaders believe need to adopt sustainability principals
McGraw-Hill Construction2012
>50% of State DOT’s have adopted sustainability principlesNCHRP 20-83
2012
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Increasing Business Opportunities
Public Deman
ds
44% Green nonresiden
tial constructio
n
$66 Billion
McGraw-Hill ConstructionJanuary 2014
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Transportation Challenges – Benchmarking Need
Total U.S. Greenhouse Gas (GHG) Emissions by Economic Sector in 2011
• 84% of the GHG from the transportation sector from vehicle combustion
EPA2011
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Credibility
Public Deman
d
True Goods2013
Recycling, Reusing, or products from a Local manufacture does not necessarily mean the product is “green”
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Measuring Sustainability Tools
How Do We Measure Environmental
Impact?
• Green Rating Metrics
• Life Cycle Assessments
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Green Rating Metrics
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Standards• Voluntary• Sets stakeholder
metrics• Defines Industry
Best Practices• No enforcement• No Review
Codes• Law• Permits• Little
Flexibility• Code
Official Review
Rating Systems• Voluntary• Aspirationa
l & Elective• Ratings
define achievement
• 3rd Party Review
Measuring Sustainability Tools
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Infrastructure Green Rating Systems
• National, State, Local
• Rating Tool• Best practices
• Earn Credits
• Indicator of sustainability
I-LAST™
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v.2009 New ConstructionSubcategories
– Sustainable Sites
– Water Efficiency
– Energy & Atmosphere
– Indoor Environmental
Quality
– Materials & Resources
– Innovation and Design
– Regional Priority
US Green Building Council (USGBC)
Scope: Buildings and NeighborhoodsPavement Related - 10%
– Urban Heat Island nonroof (1 pt)
– Stormwater design (2 pts)– Construction waste
management (2 pts)– Materials reuse (2 pts)– Recycled content (2 pts)– Regional materials (2 pts)
Leadership in Energy & Environmental Design
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Envision
Scope: Civil InfrastructurePavement Related - 25%
Leadership 10By-Product Synergy Opportunities 1Extend Useful Life 1
Natural World 15Manage Stormwater 1
Quality of Life 13Minimize Noise 1Develop Local Skills and Capabilities 1Enhance Public Health and Safety 1
Climate and Risk 8Reduce Greenhouse Gas Emissions 1Reduce Air Pollutant Emissions 1Prepare for Long-Term Climate Adaptability 1Manage Heat Island Effects 1
Resource Allocation 14Reduce Net Embodied Energy 1Support Sustainable Procurement 1Use Recycled Materials 1Use Regional Materials 1Divert Waste from Landfills 1Provide for Deconstruction and Recycling 1
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INVEST
Project Development 126Stormwater Up to 9Reduce and Reuse Up to 8Recycle Materials Up to 8Long-Life Pavement 5Reduce Energy Emissions in Pavement Materials 3Contractor Warranty 1 or 3Construction Environmental Training 1Construction Equipment Emission Reduction 2Construction Noise Mitigation 2Construction Quality Control Plan 5Construction Waste Management Plan 3
Scope (3 Modules)• System Planning –
Transportation system & project planning
• Project Development –Design & Construction
• Operations & Maintenance
Pavement Related - 39%
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Greenroads
Scope: Roadway Design & ConstructionPavement Related - 45%
Project Requirements 11Environment & Water 21Access & Equity 30Construction Activities 14
Quality Management System 2 Environmental Training 1 Site Recycling Plan 1 Fossil Fuel Reduction 1-2 Equipment Emission Reduction 1-2
Paving Emissions Reduction 1 Contractor Warranty 3Materials & Resources 23 Life Cycle Assessment 2 Pavement Reuse 1-5 Recycled Materials 1-5 Regional Materials 1-5
Pavement Technologies 20 Long Life Pavement 5 Permeable Pavement 3 Warm Mix Pavement 3 Cool Pavement 5 Quiet Pavement 2-3 Pavement Performance Tracking 1
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Summary Green Rating Metrics
Similarities
• Stormwater Management
• Recycling or Reusing Materials
• Local Materials (except for INVEST)
Future Trend
• Measuring Potential Impacts
• Life Cycle Assessments
• Environmental Product Declaration
• Health Product Declarations
Green Rating System Benefits
• LEED
• Most Well Known
• INVEST
• No Urban Heat Island credit
• ENVISION
• Not Prescriptive
• Greenroads
• Most Pavement Specific Credits
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Life Cycle Assessment (LCA)-- methodology to measure and understand the potential environmental impacts associated with a product
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LCA Framework
Defined in ISO 14040 Series
Goal and
Scope
Life Cycle
Inventory
Interpretation
Impact Assessment
Source: ISO 14040
Review and Refine
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1. Goal and Scope Definition
Goal defines:
• What is the aim of the study?
• Who is the audience of the study?
Scope defines:
• Unit
• System Boundary
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System Boundaries
Asphalt binder
manufacture
Transportation to plant
Aggregate production
Transportation to plant
Plant Operations
Transportation to site
Construction
Fuels
Transportation to plant
Cradle to Gate
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2. Life Cycle Inventory
• Aggregates• Admixtures• Asphalt Binder
• Transport
Raw Material
• Fuel• Water• Equipment
Production
• Transport• Paving
Construction
• Vehicle Operation
• UHI• Stormwater Runoff
• Maintenance/ Workzone congestion
Use
• Landfill• Recycle
End of Life
Recycle/Reuse
Outputs – Solid Wastes, Emissions to Air, Emissions to Water
Inputs – Materials, Energy, Water
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3. Impact Assessment
Per ton of HMA AsphaltAggregates
Plant Oper.
Transport
Const. TotalNatural Manuf.
Emissions to Air (g/ton)
SO2
9.4E+01 ---- ---- 1.7E+00 ---- ----
9.5E+01
NOx
1.1E+02
1.3E+00 ---- 1.3E+01 4.4E+02
1.5E+02
7.1E+02
CO2
1.5E+04
1.2E+03 ---- 1.7E+04 ---- ----
3.2E+04
CO7.3E+0
0 ---- ---- 6.5E+01 1.9E+036.0E+0
22.6E+0
3
HC6.8E+0
1 ---- ---- ---- 1.5E+025.0E+0
12.7E+0
2Metals not specified 2.3E-01 ---- ---- ---- ---- ---- 2.3E-01HCI 5.7E-02 ---- ---- ---- ---- ---- 5.7E-02PM2.5 ---- ---- 5.6E-03 ---- ---- ---- 5.6E-03
PM10 ---- ----4.7E+0
1 3.2E+03 ---- ----3.2E+0
3
Total PM1.1E+0
18.1E+0
11.6E+0
2 1.4E+04 4.4E+011.9E+0
01.4E+0
4
CH4 ---- ---- ---- 6.0E+00 ---- ----6.0E+0
0
VOC ---- ---- ---- 1.6E+01 ---- ----1.6E+0
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Potential Environmental Impact
Global Warming Potential Acidification Eutrophication
Fossil Fuel Depletion Water Use Criteria Air Pollutants
Human Health- Noncancerous
Human Health- Cancerous
Photochemical Smog
Ozone Depletion Terrestrial Toxicity Resource Depletion
Land Use Aquatic Toxicity
Source: Hassan 2009
?
• ℎ 𝑇𝑜𝑜𝑙 𝑓𝑜𝑟 𝑡 𝑒 𝑅𝑒𝑑𝑢𝑐𝑡𝑖𝑜𝑛 𝑎𝑛𝑑 𝐴𝑠𝑠𝑒𝑠𝑠𝑚𝑒𝑛𝑡 𝑜𝑓ℎ ℎ 𝐶 𝑒𝑚𝑖𝑐𝑎𝑙 𝑎𝑛𝑑 𝑂𝑡 𝑒𝑟 𝐸𝑛𝑣𝑖𝑟𝑜𝑛𝑚𝑒𝑛𝑡𝑎𝑙 𝐼𝑚𝑝𝑎𝑐𝑡𝑠
( )𝑇𝑅𝐴𝐶𝐼• Impact Assessment Tool for US
• Developed by EPA
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4. Interpretation
• Results are Potential Impacts not Actual
• Must consider the assumptions made & data limitations
• Does not account for technical performance, costs, & many social impacts
Interpretation of LCA results and comparisons are not easy!
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Environmental Product Declarations
Product Category Rules (PCRs)Rules a product must follow to publish an EPD
• Defines Goal and Scope• Sets LCA boundaries• Delineates Acceptable
Inventory Data• Identifies Impact
Categories• ISO 14025
Environmental Product Declarations (EPDs)Standardized LCA Report defined by Product Category Rules (PCRs)
• Fair• Comparable• Third Party Reviewed• Credible• ISO 14025
PCR
LCA
EPD
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Example EPD
Environmental FactsFunctional unit: 1 metric ton of asphalt concrete
Boundaries: Cradle-to-GateCompany: XYZ Asphalt
RAP: 10%
Source: PE International, Values are for illustration purposes only.
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Conclusions
• Many Sustainable Asphalt Technologies
• Growing Public Demand for Sustainability
• Tools Available to Measure Sustainability• Green Rating Systems – LEED, Greenroads,
Envision, INVEST
• LCA
• Product Transparency• NOT all LCAs are equal
• EPDs are preferred
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Industry Path Forward
Environmental Sustainability Pavement Economics Committee• Comprised of SAPAs and Industry
Representatives
• Identified Project Develop Industry Asphalt Mixture EPD Program
• EPD/PCR Technical Working Group will oversee process
• Create a PCR for asphalt mixtures• Create a tool for industry to create EPD• Peer Benchmarking
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Strengthen Your Company & The Industry
• Expand your staff with direct access to engineering, environmental, health & safety, legislative, and communications professionals
• Get ahead of the innovation curve with advance knowledge of new technologies, techniques, and practices that improve product quality and operational efficiency
• Protect your investment in your company from competitive and regulatory threats
• It costs less than 2 cents a ton
www.AsphaltPavement.org/JoinNAPA
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