…okay, maybe not so much.
It’s just that I’m sitting here in my comfy new leather recliner (always wanted one), and with the spirit of holidays and vacation days still upon me, it’s easy to… well, get a tad carried away.
The reality is that if you use ZAM, you won’t be able to leap tall buildings in a single bound. I suspect you already knew that. BTW the name ZAM stands for “zero air material.” It basically comes in two different flavors: zero air and zero nitrogen. And if you’re an acid rain utility, you must use one or the other (some use air and some prefer nitrogen)—basically because the EPA says you must.
It’s all there in 40 CFR Part 75, which calls for a continuous emissions monitoring system (CEMs) to be exposed to what they call zero air material. This in order to qualify the accuracy of the monitoring instrument. Part 75.21 states that calibration gases used must meet characteristics that are delineated in 40 CFR Part 72.2.
Sound complicated? It’s not really, except that some CEMs users use standard EPA protocol mixtures thinking this will satisfy the requirement. Trouble is, this practice can lead to inaccurate calibration due to biased zero readings arising from contamination in the mixture. And inaccurate calibration leads to inaccurate emissions measurement and reporting—which, as we all know, is definitely not a good thing.
The bottom line: to minimize the likelihood of faulty CEMs calibration, it’s better to use a zero material that is certified to feature all of the low contaminant levels that are specified in 40 CFR Part 72.2. Umm…. that would be Scott™ brand ZAM from Air Liquide America Specialty Gases. Who else? While you won’t be leaping any higher, and you may not exactly be leaping for joy at the guaranteed purity of this stuff, you will be protecting and defending your CEMs against biased zero readings.
Once again, it’s Air Liquide’s Scott brand gas mixtures to the rescue!