Appendix K / PS 12B specifies sampling, and analytical, and quality-assurance criteria and procedures for the performance-based monitoring of vapor-phase mercury (Hg) emissions in combustion flue gas streams, using a sorbent trap monitoring system. The principle employed is continuous sampling using in-stack sorbent media coupled with analysis of the integrated samples. The performance-based approach of Appendix K allows for use of various suitable sampling and analytical technologies while maintaining a specified and documented level of data quality through performance criteria.
Any trap can be customized for special stack conditions. For high particulate and wet stacks, we recommend using the Apex Sorbent Trap Shield to reduce sorbent trap plugging.
*Stack Condition Key
RATA - Relative Accuracy Test Audits of App K Sampling Systems
Standard - Stack Temp 200-400oF, SO2 Level < 500PPM
Acid Gases - Stack Temp 200-400oF, SO2 Level > 500PPM
High Temp - Stack Temp > 400oF, SO2 Level < 500PPM
High Temp - Stack Temp > 400oF, SO2 Level > 500PPM
& Acid Gas
Standard Spike Levels Range from 1,000 ng to 20,000 ng - CUSTOM LEVELS AVAILABLE