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National Asphalt Pavement Association | AsphaltPavement.org
Environment, Health & Safety:
a national perspective
1
• The last two years have been busy !
• Promoting environmental stewardship
& net zero carbon emissions goals
• Addressing misperceptions
& communicating risk
• Ensuring the health & well-being
of road construction workers
National Asphalt Pavement Association | AsphaltPavement.org
Promoting
environ stewardship
& carbon reduction
2
• Environmental stewardship includes net zero carbon goals
• Understanding, eliminating
& reducing adverse impacts
• Addressing misperceptions
& communicating risk
National Asphalt Pavement Association | AsphaltPavement.org
Learn more at
asphaltpavement.org/climate
Vision: Sustainable communities
and commerce, connected by net
zero carbon emission asphalt
pavements
Mission: Engage, educate, and
empower the U.S. asphalt community
to produce and construct net zero
carbon emission asphalt pavements
National Asphalt Pavement Association | AsphaltPavement.org 4
• Production &
Construction
• Supply Chain
• Electricity
• Quality
• Durability
• Longevity
• Efficiency
National Asphalt Pavement Association | AsphaltPavement.org 5
Learn more at www.asphaltpavement.org/epd
National Asphalt Pavement Association | AsphaltPavement.org
Inflation Reduction Act
EPA
• $250 million to standardize EPDs and help industry develop EPDs
• $100 million to develop “low-embodied carbon construction
material labeling program”
*** How will low-embodied carbon materials be defined ???
DOT/FHWA/GSA
• $2 billion to procure construction products and materials with
“substantially lower” embodied carbon
• EDC-7: EPDs for Sustainable Project Delivery
National Asphalt Pavement Association | AsphaltPavement.org 7
3,013,030
homes' energy use
for one year
5,575,907
Passenger vehicles
driven for one year
2,903,116,912
gallons of gasoline
consumed
59,732,454
barrels of oil
consumed
33,226,025
acres of U.S. forests
in one year
Carbon sequestered by
CO2 emissions from
CO2 emissions from
GHG emissions from CO2 emissions from
A decade’s impact of RAP
National Asphalt Pavement Association | AsphaltPavement.org
Promoting environmental stewardship
8
➢ Compliance assurance and operational best practices
➢ Understanding, eliminating
& reducing adverse impacts
➢ Addressing misperceptions
& communicating risk
National Asphalt Pavement Association | AsphaltPavement.org 9
• Understand the regulations
• Spill Prevention (SPCC):
fuel, asphalt, additives
• Managing fugitive emissions:
odor, dust, loadout
• Improving energy efficiency &
controlling aggregate moisture
Compliance assurance and operational best practices
National Asphalt Pavement Association | AsphaltPavement.org 10
➢ Understanding, eliminating & reducing adverse impacts
➢ Addressing misperceptions & communicating risk
leachate & air emissions
National Asphalt Pavement Association | AsphaltPavement.org 11
Potential environmental pathways
National Asphalt Pavement Association | AsphaltPavement.org 12
Potential environmental pathways
National Asphalt Pavement Association | AsphaltPavement.org 13
Potential environmental pathways
Yale University – Sept 2020
National Asphalt Pavement Association | AsphaltPavement.org
Yale University research
15
National Asphalt Pavement Association | AsphaltPavement.org
Roofing Solar, 3.3E-04 Paving Solar, 2.1E-04
Gasoline, 7.0E-01
Diesel, 7.0E-01
Known VCPs, 7.3
Best Available Estimate of SoCAB Annual Avg SOA (Gg/year)
Roofing Solar Paving Solar Gasoline Diesel Known VCPs
Industry sensitivity analysis
Yale assumptions: 24/7; pavement @ 140°F; sun @ max intensity; asphalt
binder ‘emits’ over its lifetime
Unable to reproduce results / Uncertain Yale methodology
16
National Asphalt Pavement Association | AsphaltPavement.org 17
Potential environmental pathways
Florida State University (FSU) – July 2020
National Asphalt Pavement Association | AsphaltPavement.org
RAP Leachate – safety continues to be validated !
• Ongoing university research findings continue to question
inertness of leachate from pavement and RAP stockpiles
• Asphalt is inert and waterproof – can’t be disputed
• Vehicle- and tire-wear depositions are increasingly being studied
• The ‘source’ material of FSU’s research findings is unknown, but
likely sealants and/or vehicular drippings
• There may be some interaction with UV radiation
• Recent study by Fla DOT & DEC will hopefully end uncertainty
19
National Asphalt Pavement Association | AsphaltPavement.org 20
Understanding the
Environmental Impacts of
Reclaimed Asphalt Pavement
https://faculty.eng.ufl.edu/timothy-
townsend/research/beneficial-use-of-
waste-materials/understanding-the-
environmental-impacts-of-reclaimed-
asphalt-pavement/ (May 2022)
National Asphalt Pavement Association | AsphaltPavement.org 21
“Using the most representative leaching method … and most
expansive PAH analysis … data continue to suggest that PAH
and metals leaching from RAP stockpiles are unlikely to
result in exceedances of risk-based limits in groundwater.”
National Asphalt Pavement Association | AsphaltPavement.org 22
Potential environmental pathways
National Asphalt Pavement Association | AsphaltPavement.org 23
• American Bar Assoc: “6PPD-Q is ‘among the
most toxic chemicals known for aquatic
organisms’ … in the parts-per-trillion”
Tire-wear & stormwater runoff
National Asphalt Pavement Association | AsphaltPavement.org 24
Image source: www.anthropocenemagazine.org/2020/08/blending-
scrap-tires-with-concrete-rubble-for-sustainable-durable-roads/
Tire-wear & stormwater runoff
• California now requires GTR-modified asphalt pavements
• Questions on potential environmental impact
National Asphalt Pavement Association | AsphaltPavement.org 25
➢ Understanding, eliminating & reducing adverse impacts
➢ Addressing misperceptions & communicating risk
leachate & air emissions
National Asphalt Pavement Association | AsphaltPavement.org 26
Siting (zoning and permitting) mix plants
National Asphalt Pavement Association | AsphaltPavement.org 27
Siting (zoning and permitting) mix plants
National Asphalt Pavement Association | AsphaltPavement.org 28
Environmental Justice
•Env burdens vs.
•Socio-economic
demographics
•Ethical questions
National Asphalt Pavement Association | AsphaltPavement.org 29
Addressing misperceptions & communicating risk
• Some people rely on the ‘internet’ as authoritative;
it’s more complicated than that
• Paving and roofing asphalt are totally different
• Paving asphalt is classified as ‘non-hazardous’
• Asphalt is a petroleum product and may have some
odor and very low emissions at high temperatures
• Residential property values near mix plants are no
different than near other industrial sources –
e.g., Alexandria Va (townhouses at $750k+)
National Asphalt Pavement Association | AsphaltPavement.org 30
Addressing misperceptions & communicating risk
• Emissions from uncontrolled AC storage tanks
are equivalent to a single residential fireplace
• Total plant emissions are similar to dry-
cleaners, gas stations, restaurants, etc
• No federal / state agency has ever identified
increased or attributable cancer risk from AC
• Mix plant emissions are extremely well-characterized
• 99% of mix plant air emissions are fuel combustion
byproducts; fugitive emissions controlled as required
National Asphalt Pavement Association | AsphaltPavement.org 31
Upcoming environmental restrictions
• Env Justice will stymie most industrial sitings
• The next round of State Implementation Plans (SIPs)
is starting: NOx, VOC, and PM will be ratcheted-down
• Road- and tire-wear microplastics will be an issue
• Strive for operational excellence and stewardship
• Carbon neutrality is here to stay and will drive
innovation and product preference
National Asphalt Pavement Association | AsphaltPavement.org
Environment, Health & Safety:
a national perspective
32
• The last two years have been crazy
• Promoting environmental stewardship
& carbon neutrality
• Addressing misperceptions &
communicating risk
• Ensuring the health & well-being
of road construction workers
National Asphalt Pavement Association | AsphaltPavement.org
Ensuring the health & well-being
of road construction workers
33
➢ Work Zone Safety
➢ Mental health awareness
➢ Heat Illness Prevention
➢ Silica Rule
➢ Confined Space
National Asphalt Pavement Association | AsphaltPavement.org 34
Work Zone Safety
• NAPA leading coalition to implement WZS Contingency Fund
• Working closely with ARTBA, Labor, state DOTs
• NAPA continues to offer employee training
• NAPA campaigns the public to pay attention:
A moment can save a life
AsphaltPavement.org/Safety
National Asphalt Pavement Association | AsphaltPavement.org 35
Mental Health Awareness
• The construction industry has
one of the highest suicide rates
of all industries – for a number
of reasons
• Difficult to discuss but resources are available / NAPA website
• Empathy, understanding, and acknowledgement
• Understand signs/symptoms and be willing to openly discuss
• https://www.asphaltpavement.org/expertise/health-safety/health-
safety/prevent-suicides-in-construction
National Asphalt Pavement Association | AsphaltPavement.org 36
Heat Illness Prevention
• OSHA actively enforcing NEP
• Abundant info & resources available
• Effective not prescriptive
• Have a Heat Illness Prevention
Plan/Program (HIPP)
• Water / Rest / Shade
• Train your employees
• ID a competent person
National Asphalt Pavement Association | AsphaltPavement.org 37
Silica Rule
• Do you know your employees’ exposure to silica dust?
• Baghouse and drum maintenance
• Changing filter bags
• QA lab aggregate sieving
• Do you have a respiratory protection program?
• Contact NAPA for guidance
AsphaltPavement.org/Safety
National Asphalt Pavement Association | AsphaltPavement.org 38
Confined Space
• But still lots of grey areas; especially ‘permit-required’ and ‘non-
permit-required’ CS. What is a mixer drum? Hazard elimination
• CS type dictates required resources, e.g., rescue squad, retrieval
• NAPA will be working to provide additional clarity and guidance
• One of the oldest OSHA
standards. (Kinda) easy to
understand what a Confined
Space is …
National Asphalt Pavement Association | AsphaltPavement.org 39
Thank-you !
Questions ?
Thank-you !
Questions ?
National Asphalt Pavement Association | AsphaltPavement.org 40

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2023 CalAPA Spring Conference presentation by Dr. Howard Marks of NAPA

  • 1. National Asphalt Pavement Association | AsphaltPavement.org Environment, Health & Safety: a national perspective 1 • The last two years have been busy ! • Promoting environmental stewardship & net zero carbon emissions goals • Addressing misperceptions & communicating risk • Ensuring the health & well-being of road construction workers
  • 2. National Asphalt Pavement Association | AsphaltPavement.org Promoting environ stewardship & carbon reduction 2 • Environmental stewardship includes net zero carbon goals • Understanding, eliminating & reducing adverse impacts • Addressing misperceptions & communicating risk
  • 3. National Asphalt Pavement Association | AsphaltPavement.org Learn more at asphaltpavement.org/climate Vision: Sustainable communities and commerce, connected by net zero carbon emission asphalt pavements Mission: Engage, educate, and empower the U.S. asphalt community to produce and construct net zero carbon emission asphalt pavements
  • 4. National Asphalt Pavement Association | AsphaltPavement.org 4 • Production & Construction • Supply Chain • Electricity • Quality • Durability • Longevity • Efficiency
  • 5. National Asphalt Pavement Association | AsphaltPavement.org 5 Learn more at www.asphaltpavement.org/epd
  • 6. National Asphalt Pavement Association | AsphaltPavement.org Inflation Reduction Act EPA • $250 million to standardize EPDs and help industry develop EPDs • $100 million to develop “low-embodied carbon construction material labeling program” *** How will low-embodied carbon materials be defined ??? DOT/FHWA/GSA • $2 billion to procure construction products and materials with “substantially lower” embodied carbon • EDC-7: EPDs for Sustainable Project Delivery
  • 7. National Asphalt Pavement Association | AsphaltPavement.org 7 3,013,030 homes' energy use for one year 5,575,907 Passenger vehicles driven for one year 2,903,116,912 gallons of gasoline consumed 59,732,454 barrels of oil consumed 33,226,025 acres of U.S. forests in one year Carbon sequestered by CO2 emissions from CO2 emissions from GHG emissions from CO2 emissions from A decade’s impact of RAP
  • 8. National Asphalt Pavement Association | AsphaltPavement.org Promoting environmental stewardship 8 ➢ Compliance assurance and operational best practices ➢ Understanding, eliminating & reducing adverse impacts ➢ Addressing misperceptions & communicating risk
  • 9. National Asphalt Pavement Association | AsphaltPavement.org 9 • Understand the regulations • Spill Prevention (SPCC): fuel, asphalt, additives • Managing fugitive emissions: odor, dust, loadout • Improving energy efficiency & controlling aggregate moisture Compliance assurance and operational best practices
  • 10. National Asphalt Pavement Association | AsphaltPavement.org 10 ➢ Understanding, eliminating & reducing adverse impacts ➢ Addressing misperceptions & communicating risk leachate & air emissions
  • 11. National Asphalt Pavement Association | AsphaltPavement.org 11 Potential environmental pathways
  • 12. National Asphalt Pavement Association | AsphaltPavement.org 12 Potential environmental pathways
  • 13. National Asphalt Pavement Association | AsphaltPavement.org 13 Potential environmental pathways
  • 14. Yale University – Sept 2020
  • 15. National Asphalt Pavement Association | AsphaltPavement.org Yale University research 15
  • 16. National Asphalt Pavement Association | AsphaltPavement.org Roofing Solar, 3.3E-04 Paving Solar, 2.1E-04 Gasoline, 7.0E-01 Diesel, 7.0E-01 Known VCPs, 7.3 Best Available Estimate of SoCAB Annual Avg SOA (Gg/year) Roofing Solar Paving Solar Gasoline Diesel Known VCPs Industry sensitivity analysis Yale assumptions: 24/7; pavement @ 140°F; sun @ max intensity; asphalt binder ‘emits’ over its lifetime Unable to reproduce results / Uncertain Yale methodology 16
  • 17. National Asphalt Pavement Association | AsphaltPavement.org 17 Potential environmental pathways
  • 18. Florida State University (FSU) – July 2020
  • 19. National Asphalt Pavement Association | AsphaltPavement.org RAP Leachate – safety continues to be validated ! • Ongoing university research findings continue to question inertness of leachate from pavement and RAP stockpiles • Asphalt is inert and waterproof – can’t be disputed • Vehicle- and tire-wear depositions are increasingly being studied • The ‘source’ material of FSU’s research findings is unknown, but likely sealants and/or vehicular drippings • There may be some interaction with UV radiation • Recent study by Fla DOT & DEC will hopefully end uncertainty 19
  • 20. National Asphalt Pavement Association | AsphaltPavement.org 20 Understanding the Environmental Impacts of Reclaimed Asphalt Pavement https://faculty.eng.ufl.edu/timothy- townsend/research/beneficial-use-of- waste-materials/understanding-the- environmental-impacts-of-reclaimed- asphalt-pavement/ (May 2022)
  • 21. National Asphalt Pavement Association | AsphaltPavement.org 21 “Using the most representative leaching method … and most expansive PAH analysis … data continue to suggest that PAH and metals leaching from RAP stockpiles are unlikely to result in exceedances of risk-based limits in groundwater.”
  • 22. National Asphalt Pavement Association | AsphaltPavement.org 22 Potential environmental pathways
  • 23. National Asphalt Pavement Association | AsphaltPavement.org 23 • American Bar Assoc: “6PPD-Q is ‘among the most toxic chemicals known for aquatic organisms’ … in the parts-per-trillion” Tire-wear & stormwater runoff
  • 24. National Asphalt Pavement Association | AsphaltPavement.org 24 Image source: www.anthropocenemagazine.org/2020/08/blending- scrap-tires-with-concrete-rubble-for-sustainable-durable-roads/ Tire-wear & stormwater runoff • California now requires GTR-modified asphalt pavements • Questions on potential environmental impact
  • 25. National Asphalt Pavement Association | AsphaltPavement.org 25 ➢ Understanding, eliminating & reducing adverse impacts ➢ Addressing misperceptions & communicating risk leachate & air emissions
  • 26. National Asphalt Pavement Association | AsphaltPavement.org 26 Siting (zoning and permitting) mix plants
  • 27. National Asphalt Pavement Association | AsphaltPavement.org 27 Siting (zoning and permitting) mix plants
  • 28. National Asphalt Pavement Association | AsphaltPavement.org 28 Environmental Justice •Env burdens vs. •Socio-economic demographics •Ethical questions
  • 29. National Asphalt Pavement Association | AsphaltPavement.org 29 Addressing misperceptions & communicating risk • Some people rely on the ‘internet’ as authoritative; it’s more complicated than that • Paving and roofing asphalt are totally different • Paving asphalt is classified as ‘non-hazardous’ • Asphalt is a petroleum product and may have some odor and very low emissions at high temperatures • Residential property values near mix plants are no different than near other industrial sources – e.g., Alexandria Va (townhouses at $750k+)
  • 30. National Asphalt Pavement Association | AsphaltPavement.org 30 Addressing misperceptions & communicating risk • Emissions from uncontrolled AC storage tanks are equivalent to a single residential fireplace • Total plant emissions are similar to dry- cleaners, gas stations, restaurants, etc • No federal / state agency has ever identified increased or attributable cancer risk from AC • Mix plant emissions are extremely well-characterized • 99% of mix plant air emissions are fuel combustion byproducts; fugitive emissions controlled as required
  • 31. National Asphalt Pavement Association | AsphaltPavement.org 31 Upcoming environmental restrictions • Env Justice will stymie most industrial sitings • The next round of State Implementation Plans (SIPs) is starting: NOx, VOC, and PM will be ratcheted-down • Road- and tire-wear microplastics will be an issue • Strive for operational excellence and stewardship • Carbon neutrality is here to stay and will drive innovation and product preference
  • 32. National Asphalt Pavement Association | AsphaltPavement.org Environment, Health & Safety: a national perspective 32 • The last two years have been crazy • Promoting environmental stewardship & carbon neutrality • Addressing misperceptions & communicating risk • Ensuring the health & well-being of road construction workers
  • 33. National Asphalt Pavement Association | AsphaltPavement.org Ensuring the health & well-being of road construction workers 33 ➢ Work Zone Safety ➢ Mental health awareness ➢ Heat Illness Prevention ➢ Silica Rule ➢ Confined Space
  • 34. National Asphalt Pavement Association | AsphaltPavement.org 34 Work Zone Safety • NAPA leading coalition to implement WZS Contingency Fund • Working closely with ARTBA, Labor, state DOTs • NAPA continues to offer employee training • NAPA campaigns the public to pay attention: A moment can save a life AsphaltPavement.org/Safety
  • 35. National Asphalt Pavement Association | AsphaltPavement.org 35 Mental Health Awareness • The construction industry has one of the highest suicide rates of all industries – for a number of reasons • Difficult to discuss but resources are available / NAPA website • Empathy, understanding, and acknowledgement • Understand signs/symptoms and be willing to openly discuss • https://www.asphaltpavement.org/expertise/health-safety/health- safety/prevent-suicides-in-construction
  • 36. National Asphalt Pavement Association | AsphaltPavement.org 36 Heat Illness Prevention • OSHA actively enforcing NEP • Abundant info & resources available • Effective not prescriptive • Have a Heat Illness Prevention Plan/Program (HIPP) • Water / Rest / Shade • Train your employees • ID a competent person
  • 37. National Asphalt Pavement Association | AsphaltPavement.org 37 Silica Rule • Do you know your employees’ exposure to silica dust? • Baghouse and drum maintenance • Changing filter bags • QA lab aggregate sieving • Do you have a respiratory protection program? • Contact NAPA for guidance AsphaltPavement.org/Safety
  • 38. National Asphalt Pavement Association | AsphaltPavement.org 38 Confined Space • But still lots of grey areas; especially ‘permit-required’ and ‘non- permit-required’ CS. What is a mixer drum? Hazard elimination • CS type dictates required resources, e.g., rescue squad, retrieval • NAPA will be working to provide additional clarity and guidance • One of the oldest OSHA standards. (Kinda) easy to understand what a Confined Space is …
  • 39. National Asphalt Pavement Association | AsphaltPavement.org 39 Thank-you ! Questions ? Thank-you ! Questions ?
  • 40. National Asphalt Pavement Association | AsphaltPavement.org 40