1. PM-2.5 FEM Requirements for Met One BAM Glenn Gehring, Technology Specialist Tribal Air Monitoring Support (TAMS) Center 541-223-1402 glenn.gehring@nau.edu

2. To obtain a NAAQS designation FEM equipment must be operated in accordance with FEM certification PM-2.5 network collocation and siting requirements must be met You must follow your approved QAPP (the QAPP must comply with all relevant CFRs)

3. Zero calibration at deployment

4. Collocation Refer to: 40 CFR Part 58 Appendix A section 3.2.5 15% of PM-2.5 (FEM or FRM) sites must be collocated (round up) – must have at least 1 FRM collocation must be with same EPA FRM method designation FEM collocation - 50% of the 15% required collocations must be with FRMs and 50% with FEMs of the same EPA FEM designation – The first collocation MUST be with an FRM Must run FRM at least once every 12 days

5. [Most tribe will fall under the FEM (C) scenario where you have fewer than 7 sites and are only required to have one collocated site for your PM-2.5 network. In this situation, if you are using a FEM it must be collocated with a FRM. If your network needs two collocated sites the second collocation must be with another FEM that has the same EPA FEM designation number as the primary monitor. Basically, 50% of monitors used for collocation must be FRM and 50% FEM (If FEMs are used in the network), with the FRM being first. If you need three collocated sites the third monitor used for collocation must also be a FRM.]

6. PM-2.5 Probe Siting Refer to: 40 CFR Part 58 Appendix E Overall probe height: 2–15 Meters above ground level (Microscale is 2-7 meters) Horizontal distance from obstacles: must be at least twice the height the obstacle protrudes above the sampler inlet (two times the height difference away) with at least 270 degrees unobstructed. Rooftop - horizontal distance from obstacles: at least 2-meters - should be away from minor sources such as furnace, incineration or food service exhausts flues – you should also avoid areas too close to residential areas with wood burning stoves Horizontal distance from the dripline of a tree: must be at least 10- meters and should be at least 20-meters. Collocated horizontal separation (for low vols): within 4-meters of each other and at least 1-meter apart (you should also have a maximum of 1 meter vertical separation) Distance from road: 2-10 meters for microscale - see chart for other scales

7. PM probe distance from roads

8. Other PM-2.5 FEM Requirements Monthly flow verifications with NIST traceable standards 40CFR58 Appendix A, Section 3.2.3 Semi-annual flow audits (at least every 6-months) 40CFR58 Appendix A, Section 3.2.4 PEP audits - 5 per year, minimum 40CFR58 Appendix A, section 3.2.7 75% data completeness Data Certification Maintained in accordance with manual QAPP compliance and appropriate documentation

9. Always check with your EPA Region’s Quality Assurance folks AND Refer to the CFRs. http://ecfr.gpoaccess.gov/