§53.35. Test procedure for Class II and Class III methods for PM 2.5 and PM −2.5 . — Inbound Citations

(a) Class II and Class III candidate equivalent methods shall be tested for comparability of PM 2.5 or PM 10-2.5 measurements to corresponding collocated PM 2.5 or PM 10-2.5 reference method measurements at each of multiple field sites, as required. Comparability is shown for the candidate method when simultaneous collocated measurements made by candidate and reference methods meet the comparability requirements specified in this section § 53.35 and in table C-4 of this subpart at each of the required test sites.

(c) Any analyzer, PM 10 sampler, PM 2.5 sampler, or PM 10-2.5 sampler offered for sale as part of an FRM or FEM shall function within the limits of the performance specifications referred to in § 53.20(a), § 53.30(a), § 53.35, § 53.50, or § 53.60, as applicable, for at least 1 year after delivery and acceptance when maintained and operated in accordance with the manual referred to in § 53.4(b)(3).