; existing source; hazardous air pollutant; major source; new source; stationary source Except as otherwise provided, the terms area source , existing source , hazardous air pollutant , major source , new source , and stationary source have the meaning given such terms in section 112(a) of the Clean Air Act ( 42 U.S.C. 7412(a) ). (4) COVID– 19 The term COVID–19 means the novel coronavirus disease 2019 that is the subject of the declaration of a public health emergency by the Secretary of Health and Human Services pursuant to section 319 of the Public Health Service Act ( 42 U.S.C. 247d ) on January 27, 2020. (5) Method 325A The term Method 325A means the Air Emission Measurement Center promulgated test method titled Volatile Organic Compounds from Fugitive and Area Sources: Sampler Deployment and VOC Sample Collection . (6) Method 325B The term Method 325B means the Air Emission Measurement Center promulgated test method titled Volatile Organic Compounds from Fugitive and Area Sources: Sampler Preparation and Analysis. (7) Method TO–15 The term Method TO–15 means the test method titled Determination of Volatile Organic Compounds (VOCs) In Air Collected In Specially-Prepared Canisters And Analyzed By Gas Chromatography/Mass Spectrometry (GC/MS) published in Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air, Second Edition. (8) NCore and SLAMS The terms NCore and SLAMS have the meaning given such terms in section 58.1 of title 40, Code of Federal Regulations (as in effect on the date of enactment of this Act). (9) Synthetic area source The term synthetic area source has the meaning given synthetic minor HAP source in section 49.152 of title 40, Code of Federal Regulations (or successor regulations).