Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 63, Subpt. DD, Tbl. 4 Table 4 to Subpart DD of Part 63—Tank Control Levels for Tanks at Existing Affected Sources as Required by 40 CFR 63.685(b)(1)(ii)

Design capacity less than 75 m³

Maximum HAP vapor pressure less than 76.6 kPa

Level 1.

Design capacity less than 75 m³

Maximum HAP vapor pressure equal to or greater than 76.6 kPa

Level 2, except that fixed roof tanks equipped with an internal floating roof and tanks equipped with an external floating roof as provided for in § 63.685(d)(1) and (2) shall not be used.

Design capacity equal to or greater than 75 m³ and less than 151 m³

Maximum HAP vapor pressure less than 13.1 kPa

Level 1.

Maximum HAP vapor pressure equal to or greater than 13.1 kPa

Level 2.

Design capacity equal to or greater than 151 m³

Maximum HAP vapor pressure less than 5.2 kPa

Level 1.

Maximum HAP vapor pressure equal to or greater than 5.2 kPa

Level 2.