[Code of Federal Regulations] [Title 40, Volume 13] [Revised as of July 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR63.7120] [Page 45] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 63_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES--Table of Contents Subpart AAAAA_National Emission Standards for Hazardous Air Pollutants for Lime Manufacturing Plants Sec. 63.7120 How do I monitor and collect data to demonstrate continuous compliance? (a) You must monitor and collect data according to this section. (b) Except for monitor malfunctions, associated repairs, required quality assurance or control activities (including, as applicable, calibration checks and required zero adjustments), and except for PSH operations subject to monthly VE testing, you must monitor continuously (or collect data at all required intervals) at all times that the emission unit is operating. (c) Data recorded during the conditions described in paragraphs (c)(1) through (3) of this section may not be used either in data averages or calculations of emission or operating limits; or in fulfilling a minimum data availability requirement. You must use all the data collected during all other periods in assessing the operation of the control device and associated control system. (1) Monitoring system breakdowns, repairs, preventive maintenance, calibration checks, and zero (low-level) and high-level adjustments; (2) Periods of non-operation of the process unit (or portion thereof), resulting in cessation of the emissions to which the monitoring applies; and (3) Start-ups, shutdowns, and malfunctions.