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 prior to this date, or….

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 weregranted 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 tests.

Example compliance test date of June 9-10

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• HCl

These CEMS must be certified PRIOR to that performance test.

RATA

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 operating load).

For more information on MATS and MATS compliance

testing, contact CleanAir today.800-991-3300

contact@cleanair.com

Thanks!