This page contains links to general information about the NPAP program for gaseous monitors including the quality assurance project plan, standard operating procedures, mobile laboratory information and towing specifications and adequacy/independence criteria.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
Quality Assurance Project Plan for the Audit Support Program - NPAP and NATTS (PDF)(48 pp, 699 K)
- Field Standard Operating Procedures for the EPA Through-the-Probe National Performance Audit Program (PDF)(170 pp, 1 MB, April 2011)
- NPAP TTP Draft Operators Field SOP (PDF)(170 pp, 1 MB, April 2011)
- NPAP Program Adequacy/Independence Criteria (PDF)(6 pp, 37 K, July 2008)
- Through the Probe Mobile Laboratory Information and Towing Specifications (PDF)(3 pp, 126 K, March 2005)