§ 61.61 Definitions.

Terms used in this subpart are defined in the Act, in subpart A of this part, or in this section as follows:

(a) Ethylene dichloride plant includes any plant which produces ethylene dichloride by reaction of oxygen and hydrogen chloride with ethylene.

(b) Vinyl chloride plant includes any plant which produces vinyl chloride by any process.

(c) Polyvinyl chloride (PVC) plant includes any plant where vinyl chloride alone or in combination with other materials is polymerized.

(d) Slip gauge means a gauge which has a probe that moves through the gas/liquid interface in a storage or transfer vessel and indicates the level of vinyl chloride in the vessel by the physical state of the material the gauge discharges.

(e) Type of resin means the broad classification of resin referring to the basic manufacturing process for producing that resin, including, but not limited to, the suspension, dispersion, latex, bulk, and solution processes.

(f) Grade of resin means the subdivision of resin classification which describes it as a unique resin, i.e., the most exact description of a resin with no further subdivision.

(g) Dispersion resin means a resin manufactured in such a way as to form fluid dispersions when dispersed in a plasticizer or plasticizer/diluent mixtures.

(h) Latex resin means a resin which is produced by a polymerization process which initiates from free radical catalyst sites and is sold undried.