eCFR Subpart VVa 
[ecfr.gov]
This subpart applies to:
- Affected facilities in the synthetic organic chemicals manufacturing industry that commence construction, modification, or reconstruction after Nov 7, 2006.
Addition or replacement of equipment for the purpose of process improvement that is accomplished without a capital expenditure is not, by itself, considered a modification.
Affected facilities:
- Components assembled and connected by pipes or ducts to process raw and to produce, as intermediate or final products, any of the chemicals listed in 60.489.
- Includes any feed, intermediate, or final product storage vessels; product transfer racks; and connected ducts and piping.
- Any of the following in VOC service:
- Pumps;
- Compressors;
- Pressure relief devices;
- Sampling connection systems;
- Open-ended valves or lines;
- Valves;
- Flanges;
- Other connectors.
- Any devices or systems required by this subpart.
Affected facilities that commenced construction, reconstruction, or modification after January 5, 1981 and on or before November 7, 2006 are subject to NSPS VV.
Chemicals applicable to this subpart:
(See attached file: NSPS Subparts VV-VVa chemical list.pdf)
Partially exempt from this subpart*:
- Affected facilities with a design capacity of less than 1,000 Mg/year (1,102 tons/year) of chemicals applicable to this subpart.
- Affected facilities that produce heavy chemicals only from heavy liquid feed or raw materials.
- Affected facilities that produce beverage alcohol.
- Affected facilities with no equipment in VOC service.
*These facilities must maintain records as required in 40 CFR 60.486a (i). Please see the rule text for full details.