Alliance Source Testing, LLC

Qualified Source Testing Individual (QSTI) Program


All of our project managers and team leaders (along with over 75% of entire testing staff) have obtained status as a Qualified Source Testing Individual (QSTI). The QSTI program was developed to increase the competency of the source testing industry, and the program is administered by the Source Evaluation Society (SES) as a service to the industry. There are five groups of tests representing all applicable methods for source testing (Group I, Group II, Group III, Group IV, and Group V).

The goal of the SES QSTI exam and abilities assessment is to determine whether the candidate demonstrates knowledge and the ability to apply source testing methods and fundamental engineering and chemistry principles in a manner consistent with that of a field test team leader. In addition to thorough and practical knowledge of source testing methods, those principles include an understanding of elementary physical gas laws and chemistry, basics of safety and hazardous material handling, and primary theories of source testing (e.g., isokinetic and proportional sampling). The candidate is expected to exemplify and demonstrate professional and ethical conduct not only during the exam process but also in representing SES as a QSTI.

This program is consistent with the mission of SES to advance the applied sciences relating to source evaluation with respect to air pollution and air pollution control by:

  • promoting the development of concepts and techniques relating to the field;
  • encouraging related professional development and knowledge;
  • striving to ensure the highest professional standards by its members.

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