01/11/1993
" [In] gas/vapor service" means that the piece of equipment in VOC service contains process fluid that is in the gaseous state at operating conditions.
" [In] heavy liquid service" means that the piece of equipment in VOC service is not in gas/vapor service or not in light liquid service.
" [In] light liquid service" means that the piece of equipment in VOC service contacts a fluid that contains greater than 10% by weight light liquid and meets the following conditions:
"Process unit" means components assembled to produce, as intermediate or final products, one or more of the chemicals listed in 40 CFR 60.489 (July 1, 1992). A process unit can operate independently if supplied with sufficient feed or raw materials and sufficient storage facilities for the product.
" [In] vacuum service" means that the equipment in VOC service is operating at an internal pressure that is at least five kPa (0.73 in. Hg) below ambient pressure.
" [In] VOC service" means that the piece of equipment contains or contacts a process fluid that is at least 10% VOC by weight. The provisions of 40.1.1.2 of this regulation specify how to determine that a piece of equipment is not in VOC service.
7 Del. Admin. Code § 1124-40.0