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Electronic Code of Federal Regulations

e-CFR data is current as of December 10, 2019

Title 40Chapter ISubchapter CPart 63Subpart HHHHHHH → Appendix


Title 40: Protection of Environment
PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED)
Subpart HHHHHHH—National Emission Standards for Hazardous Air Pollutant Emissions for Polyvinyl Chloride and Copolymers Production


Table 3 to Subpart HHHHHHH of Part 63—Summary of Control Requirements for Storage Vessels at New and Existing Sources

If the storage vessel capacity (gallons) is .  .  .And the vapor pressurea (psia)
is .  .  .
Then, you must use the following type of storage vessel .  .  .
≥20,000 but <40,000≥4Internal floating roof, external floating roof, or fixed roof vented to a closed vent system and control device achieving 95 percent reduction.b
≥40,000≥0.75Internal floating roof, external floating roof, or fixed roof vented to a closed vent system and control device achieving 95 percent reduction.b
Any capacity.>11.1Pressure vessel.c
All other capacity and vapor pressure combinationsFixed roof.d

aMaximum true vapor pressure of total HAP at storage temperature.

bIf using a fixed roof storage vessel vented to a closed vent system and control device, you must meet the requirements in §63.11910(a) for fixed roof storage vessels. If using an internal floating roof storage vessel or external floating roof storage vessels, you must meet the requirements in §63.11910(b) for internal floating roof storage vessels or external floating roof storage vessels, as applicable.

cMeeting the requirements of §63.11910(c) for pressure vessels.

dMeeting the requirements in §63.11910(a) for fixed roof storage vessels.

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