organics liquids distribution (non-gasoline) mact summary

4. What is an affected source under this rule?

An affected source has been defined as the collection of activities and equipment used to distribute organic liquids into, out of, or within a major source plant site. This affected source is termed the “organic liquids distribution operation'' or OLD.  

The four types of emission sources  included in the affected source are: storage tanks storing organic liquids; transfer racks at which organic liquids are loaded into or unloaded out of transport vehicles and/or containers; the transport vehicles themselves while they are loading or unloading organic liquids at transfer racks; and equipment leak components in organic liquids service that are associated with pipelines and with storage tanks and transfer racks storing, loading, or unloading organic liquids. Applicability of this rule is not restricted to any specific industries, but to each OLD operation that meets the applicability criteria. The final standards do not apply to any emission source that is subject to another 40 CFR part 63 rule.

The liquids regulated by this rule consist of non-crude oil organic liquids that contain at least 5 percent by weight of any combination of the organic HAP compounds listed in Table 1 to Subpart EEEE of Part 63 and have a total liquid vapor pressure of 0.1 psia or greater, plus all crude oils downstream of the first point of custody transfer. Gasoline is specifically excluded from coverage by this rule as are fuels consumed or dispensed on the plant site as well as kerosene (No. 1 distillate oil), diesel (No. 2 distillate oil), asphalt, and heavier distillate oils and fuel oils.

Many of the facilities potentially affected by this rule contain activities and equipment (i.e., certain storage tanks, transfer racks, and equipment components) that are already subject to other Federal air standards (such as 40 CFR part 60, Subpart Kb, for storage tanks, or Subpart GGG or FFFF of 40 CFR part 63). This rule clarifies that emission sources subject to other 40 CFR Part 63 NESHAP are not subject to this OLD NESHAP.  However, sources subject to other non-MACT rules must comply with the requirements of the OLD NESHAP as well as the other rules.