Mercury Monitoring - Integrity Checks

Will Thermo Fisher Scientific accept the monitors for re-calibration? (if so, do it; if not, why not?).

Does the documentation supplied with the monitors claim this performance? (if not, you're stuck; if so, they are).

Basically we are stuck. From what I understand it is an industry wide problem (where it is required), Thermo has been working with us. It is not as easy as taking it out and sending it in. It is part of the Continous Emissons Monitoring System(CEMS) so it is serial numbered and any replacement must go through RATA testing and certification to have valid data.

I HAVE THE SAME SYSTEM RUNNING ON TWO 750MW UNITS. We are in the process of adressing the same issue. It seems that leaks have been our main problem and will affect the Integrity the most. Also the probe filter being contaminated affects this. I have got some new write-up from TF If you are interested. I will keep you informed on what we find.

I've got Mercury Freedom 80i's on three stacks. Similar in configuration to yours, 370MW T-Fired pulverized coal with Wyoming low sulphur Sub-C as primary fuel. We installed the systems last year and all three have passed relative accuracy test for contract completion. Our units all fell well below the "low emitter" thresholds.

By integrity checks, I assume you are speaking of the mercury chloride generator checks. I wish I had more information for you on that subject, but frankly our state adopted the EPA's rule by reference and when it went away, the state decided not to go forward with they're own rule. We decided not to mess with the chlorine gas and did not even hook up the system.

I attended a utility conference last year on pollution control equipment, of several hundred attendees, I didn't find one plant that had successful, accurate and repeatable results with Thermo's oxidized mercury "integrity checks." We're really hoping that our state will accept the EPA 30B Rata as proof of the system or that Thermo develops a better system before we have a new rule from the EPA.

Are you trying to run chlorine integrity checks? And yes thats what I was speaking of.

Regards,

Jeremy