PM-2.5 FEM Requirements for Met One BAM Glenn Gehring, Technology Specialist Tribal Air Monitoring Support (TAMS) Center 541-223-1402 [email protected] 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) Zero calibration at deployment 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 [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.] 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 10meters 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 PM probe distance from roads 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 http://ecfr.gpoaccess.gov/ Always check with your EPA Region’s Quality Assurance folks AND Refer to the CFRs.