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

California Asphalt Pavement Association
28 Mar 2023
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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
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