STACS CEM

Continuous Emissions Monitoring Systems (CEMS) permanently installed for selected processes require initial and periodic quality assurance audit tests to ensure that they are functioning properly and reporting emissions accurately. Depending on the industry and process type, there are several sets of regulations that dictate the exact QA/QC requirements that the CEMS must meet.

Pertinent Federal regulations include 40CFR60, Appendix B and F, 40CFR75, Appendix A, B, and E (Acid Rain), as well as the Boiler and Industrial furnace rules, and others. In many cases, states have their own requirements for CEMS certification as well. Conducting a relative accuracy test audit (RATA) is required under any of the rules as well as an initial 7 day drift test.

Selected regulations such as the acid rain programs (Part 75) require additional tests such as cycle response time, linearity and bias tests. Continuous opacity monitoring systems (COMS) also require initial and periodic tests including optical alignment, optical density filter checks, dust accumulation tests and clear stack tests.

STACS routinely conducts relative accuracy test audits as well as providing the capability of turnkey CEMS certification encompassing all of the required quality assurance tests for your system. We reduce the data (including moisture and bias corrections) STACS can also provide the RATA results in EPA's Electronic Data Reporting (EDR) format for Part 75 sources using our automated programs, relieving your staff of this often cumbersome chore.

STACS also provides CEMS diagnostic, troubleshooting and consulting services including data validation.

Predictive Emissions Monitoring Systems (PEMS)

In addition, STACS develops Predictive Emissions Monitoring System (PEMS) curves for a variety of pollutants for qualifying facilities. PEMS avoid the high capital and maintenance costs of CEMS. PEMS systems are generally required to be re-certified after a period of five years or after a given number of operating hours.