{"data":{"id":"us-va/9vac5-40-8410","jurisdiction":"us-va","citation":"9VAC5-40-8410","heading":"Monitoring","body":"A. The provisions of 9VAC5-40-40 (Monitoring) apply.\n\nB. Periodic monitoring of letterpress printing operations shall be conducted as follows:\n\n1. The temperature of a catalytic or thermal oxidation control device shall be monitored at least once every 15 minutes while the printing process is operating, and that temperature shall be recorded by an analog or digital recording device.\n\na. For a catalytic oxidizer, the dryer exhaust temperature upstream of the catalyst bed shall be monitored and recorded.\n\nb. For a thermal oxidizer, the combustion chamber temperature of the oxidizer shall be monitored and recorded.\n\n2. Catalyst bed material in a catalytic oxidation control device shall be inspected annually for general catalyst condition and any signs of potential catalyst depletion. Sampling and evaluation of the catalyst bed material shall be conducted whenever the results of the inspection indicate signs of potential catalyst depletion or poor catalyst condition based on manufacturer's recommendations, but not less than once per year.\n\n3. If a heatset web letterpress printing process is interlocked to ensure that the control device is operating and airflow is present when the printing process is operating, then periodic monitoring of dryer air flow is not required. If no interlock is present, then the printing process dryer air flow shall be verified and recorded once per operating day.","path":["Title 9. Environment","Agency 5. State Air Pollution Control Board","Chapter 40. Existing Stationary Sources","Part II. Emission Standards","Article 56. Emission Standards for Letterpress Printing Operations in the Northern Virginia Volatile Organic Compound Emissions Control Area, 8-hour Ozone Standard (Rule 4-56)"],"source_url":"https://law.lis.virginia.gov/admincode/title9/agency5/chapter40/section8410/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:48:22Z","sha256":"f3cd8aebb1d100bbf541dcf142d6e5a9aef39940f5ef4512040f732cc0fcca36","source_id":"us-va-vac","stale":false,"prev":"us-va/9vac5-40-8400","next":"us-va/9vac5-40-8412"},"notice":"GroundRules: Original legal text. Not legal advice."}