I got an e-mail asking if I knew any EPA-approved low-cost methods for monitoring ozone. I don't, but I figured it wouldn't be too hard to find the list of Federal Equivalent Methods (FEM) and Federal Reference Methods (FRM). I was wrong.
I found a place where the EPA says they should have a list of FEMs and FRMs, but the file is missing. I filed an error report.
Does anyone know where to get the FEMs and FRM list? Am I just looking in the wrong spots? Is the list missing because its being updated to meet the 2015 change in FRMs for ozone?
A curriculum on ozone from my bookmarks: this curriculum includes how to make your own DIY test strips as well as electronic monitoring.