Stack Emission Monitoring

What's New

Water Monitoring Assocation is a division of the STA

  Stack Emission Monitoring

Stack Emission Monitoring

Technical task group

The Technical Task Group holds combined meetings with the Quality Task Group four times a year at the STA offices in Hitchin. Any member company can send as many representatives as they wish to these meetings. Attendances continue to increase and this is because, I believe, of the continuing success the groups have in addressing and resolving issues raised by the membership. Stack sampling specialists from the Environment Agency and UKAS attend every meeting enabling frank and fruitful discussions on a range of topics such as:





Whenever it is requested by the membership specific technical guidance is written and is can be found in the members area of the website. There are currently 37 documents covering topics such as:

  Testing Incinerators

  Calculating delta H

  Chemical resistance data

  Oxygen correction on WID related processes.

BSI involves the STA where new national or international standards for stack sampling are being developed and reviewed. At the very least the members of the Task Group are given the opportunity to comment at the draft stage. Often the STA sends representatives to the meetings and sometimes organises and runs the committees.

Technical Transfer Seminars are organised on pertinent topics. They are always well attended.

Quality task group

The Quality Task Group holds combined meetings with the Technical Task Group four times a year at the STA offices in Hitchin. The joint meetings cover a wide range of topics of interest to the stack testing community and active discussions and participation is welcomed. The Quality task group specifically addresses those issues relating to improving the value and reliability of the results we provide to our customers as stack testers. The topics routinely discussed include proficiency testing  (PT) schemes, relevant CEN standards and EA method implementation documents, EN 14181 guidance, calibration techniques and the availability of calibration gases.  In addition to a large number of stack testing companies, UKAS, EA, process operators and gas supply companies also attend the meetings, enabling issues and topics raised by members to be addressed in the meetings.

The Quality Task Group is active in producing guidance for members, including the STA Guide to the calculation of uncertainty, and the example uncertainty calculation spreadsheets. Members also have the opportunity to input in to EA guidance and CEN and ISO standards.  Technical Transfer Seminars are organised on specific topics, including the perennial favourite uncertainty.

In addition the Quality and Technical groups also undertake specific projects, often with EA or DIUS support, to investigate particular issues related to stack testing methods. Recent examples have included studies into particulate monitoring at very low dust levels, which led to the publication of new EA guidance, and the validation of the EA's SO2 instrument method (M21) as a potential alternative reference method to the CEN manual method. We also have an FTIR interest group, which is currently developing a method for FTIR measurements, which will become an EA guidance document and subsequently may be proposed as a CEN standard method.