Back in 1996 when the first PAMS automated systems were deployed, the EPA published a series of technical documents on many topics and issues associated with the hourly sampling and analysis for agencies required to do PAMS monitoring. These old documents still have some valuable information and are available on the Air Monitoring Technology Information Center (AMTIC) site. I thought I would share these here.
https://www3.epa.gov/ttnamti1/pamsgram.html