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MATS Timeline
For most U.S. utilities, the compliance date for 
the Mercury and Air Toxics Standards (MATS) 
is April 16, 2015
THAT’S LESS THAN 
8 MONTHS AWAY
The compliance requirements 
are spelled out in Subpart 
UUUUU of 40 CFR Part 63
About 460 plants will be affected by 
these requirements
Compliance with the rule 
begins next April. Plants 
can demonstrate 
compliance through stack 
testing up to 12 months 
p...
They will have 180-days after 4/16 to 
demonstrate that they are meeting the 
new emissions limits and work practices.
Unless they have filed for and were 
granted a one-year extension. 
In that case, the dates move to 2016.
There is a lot of work that needs to happen 
prior to next April. For example, utilities need 
to…
Submit the overall site-specific Monitoring 
Plan at least 60 days prior to any 
compliance tests or CEMS performance 
tes...
Submit a mercury CEMS Monitoring Plan 
by March 26, 2015.
Submit a CEMS QA/QC Plan prior to 
beginning any monitor certification 
tests.
Submit a site-specific Performance 
Evaluation Plan at least 60 days prior to any 
compliance or CEMS performance tests.
Notify the agency of compliance or 
CEMS performance test dates at least 60 
days in advance.
Some compliance 
tests will consist of 
a 30-day 
performance test 
using the plant’s 
CEMS (or STMS) 
data. 
• Hg 
• PM 
...
These CEMS must be certified PRIOR to 
that performance test.
Plants may opt to demonstrate ongoing 
PM and HCl compliance through 
quarterly testing instead of CEMS.
In those cases, the first quarterly test 
must be done within 180 days of the 
compliance deadline…
And must consist of three runs while the 
unit is operating at 90-110% of design 
capacity (or at maximum normal 
operatin...
For more information on MATS and MATS compliance 
testing, contact CleanAir today. 
800-991-3300 
contact@cleanair.com 
Th...
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MATS Timeline for Compliance

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Utilities must comply with the new Mercury and Air Toxics Standards by April 16, 2015. This presentation discusses some of the upcoming milestones for compliance.

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MATS Timeline for Compliance

  1. 1. MATS Timeline
  2. 2. For most U.S. utilities, the compliance date for the Mercury and Air Toxics Standards (MATS) is April 16, 2015
  3. 3. THAT’S LESS THAN 8 MONTHS AWAY
  4. 4. The compliance requirements are spelled out in Subpart UUUUU of 40 CFR Part 63
  5. 5. About 460 plants will be affected by these requirements
  6. 6. Compliance with the rule begins next April. Plants can demonstrate compliance through stack testing up to 12 months prior to this date, or….
  7. 7. They will have 180-days after 4/16 to demonstrate that they are meeting the new emissions limits and work practices.
  8. 8. Unless they have filed for and were granted a one-year extension. In that case, the dates move to 2016.
  9. 9. There is a lot of work that needs to happen prior to next April. For example, utilities need to…
  10. 10. Submit the overall site-specific Monitoring Plan at least 60 days prior to any compliance tests or CEMS performance tests. Example compliance test date of June 9-10
  11. 11. Submit a mercury CEMS Monitoring Plan by March 26, 2015.
  12. 12. Submit a CEMS QA/QC Plan prior to beginning any monitor certification tests.
  13. 13. Submit a site-specific Performance Evaluation Plan at least 60 days prior to any compliance or CEMS performance tests.
  14. 14. Notify the agency of compliance or CEMS performance test dates at least 60 days in advance.
  15. 15. Some compliance tests will consist of a 30-day performance test using the plant’s CEMS (or STMS) data. • Hg • PM • HCl
  16. 16. These CEMS must be certified PRIOR to that performance test.
  17. 17. Plants may opt to demonstrate ongoing PM and HCl compliance through quarterly testing instead of CEMS.
  18. 18. In those cases, the first quarterly test must be done within 180 days of the compliance deadline…
  19. 19. And must consist of three runs while the unit is operating at 90-110% of design capacity (or at maximum normal operating load).
  20. 20. For more information on MATS and MATS compliance testing, contact CleanAir today. 800-991-3300 contact@cleanair.com Thanks!

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