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Fix the Worst First
Finding High-Volume Natural Gas
Leaks from Underground Pipes
Audrey Schulman
HEETma.org
Old infrastructure
Problems
1.  Potentially explosive
HEETma.org
HEETma.org
Problems
1.  Potentially explosive
2.  Kill trees
Problems
1.  Potentially explosive
2.  Kill trees
3.  Powerful greenhouse gas
Burned = CO2 NOT burned = Methane
86X more d...
Problems
1.  Potentially explosive
2.  Kill trees
3.  Powerful greenhouse gas
4.  Paid for by the ratepayer
HEETma.org
Mapping the leaks
HEETma.org
Super-emitters
HEETma.org
HEETma.org
Subsurface Gas Reads=>50%
HEETma.org
(saturated area)
(saturated area)(saturated area)
Study:
500 pre-surveyed leaks
●  Select leaks for gas
read and size of
“footprint”
Study:
500 pre-surveyed leaks
●  Select leaks for gas
read and size of
“footprint”
●  Then measure the
emissions
HEETma.org
HEETma.org
HEETma.org
HEETma.org
(saturated area)(saturated area)
Chamber method underestimates emissions
Areas measured
HEETma.org
Learning Method
Learning Method
Learning Method
Learning Method
Modified Purger
Inexpensive, fast to use
Reliable rugged accepted by utilities
Learning mechanism for utilities to teach
t...
Audrey schulman mas 2017
Audrey schulman mas 2017
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Audrey schulman mas 2017

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Presentation at Massachusetts Sustainable Communities and Campuses Conference on March 17, 2017

Published in: Environment
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Audrey schulman mas 2017

  1. 1. Fix the Worst First Finding High-Volume Natural Gas Leaks from Underground Pipes Audrey Schulman HEETma.org
  2. 2. Old infrastructure
  3. 3. Problems 1.  Potentially explosive HEETma.org
  4. 4. HEETma.org Problems 1.  Potentially explosive 2.  Kill trees
  5. 5. Problems 1.  Potentially explosive 2.  Kill trees 3.  Powerful greenhouse gas Burned = CO2 NOT burned = Methane 86X more damaging HEETma.org
  6. 6. Problems 1.  Potentially explosive 2.  Kill trees 3.  Powerful greenhouse gas 4.  Paid for by the ratepayer HEETma.org
  7. 7. Mapping the leaks HEETma.org
  8. 8. Super-emitters HEETma.org
  9. 9. HEETma.org
  10. 10. Subsurface Gas Reads=>50% HEETma.org
  11. 11. (saturated area)
  12. 12. (saturated area)(saturated area)
  13. 13. Study: 500 pre-surveyed leaks ●  Select leaks for gas read and size of “footprint”
  14. 14. Study: 500 pre-surveyed leaks ●  Select leaks for gas read and size of “footprint” ●  Then measure the emissions HEETma.org
  15. 15. HEETma.org
  16. 16. HEETma.org
  17. 17. HEETma.org
  18. 18. (saturated area)(saturated area) Chamber method underestimates emissions Areas measured
  19. 19. HEETma.org
  20. 20. Learning Method
  21. 21. Learning Method
  22. 22. Learning Method
  23. 23. Learning Method
  24. 24. Modified Purger Inexpensive, fast to use Reliable rugged accepted by utilities Learning mechanism for utilities to teach themselves Columbia Gas, Eversource, National Grid Barr Foundation Funding HEETma.org

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