Report #09-P-0235, September 16, 2009
What We Found
We purchased 87 cylinders of EPA Protocol Gases and had NIST analyze each cylinder to determine whether the three gaseous mixtures contained in each cylinder (carbon dioxide, nitric oxide, and sulfur dioxide) met the Acid Rain Program’s accuracy criterion.
Report Materials
You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Report At A Glance (PDF)(1 pg, 38 K)
- Full Report (PDF)(33 pp, 203 K)