part_subject: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED)"
subpart_code: "P"
subpart_subject: "PPPP—National Emission Standards for Hazardous Air Pollutants for Engine Test Cells/Stands"
section_number: "63.9301"
section_subject: "What are my options for meeting the emission limits?"
cfr_reference: "40 CFR 63.9301"
title_name: "Title 40"
title_subject: "Protection of Environment"
parts_covered: "Part 63 (§ 63.8980 to end of part 63)"
revised_date: "Revised as of July 1, 2019"
publication_date: "As of July 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
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You may use either a continuous parameter monitoring system (CPMS) or a continuous emission monitoring system (CEMS) to demonstrate compliance with the emission limitations. Continuous monitoring systems must meet the requirements in § 63.9306 (CPMS) and § 63.9307 (CEMS).