Wisconsin Administrative Code › Department of Natural Resources › NR 400-499 - Environmental Protection - Air Pollution Control › Chapter NR 449 - Control of vinyl chloride emissions › Section NR 449.02 - Definitions

Current through June 24, 2024
The definitions contained in ch. NR 400 apply to the terms
				  used in this chapter. In addition, the following definitions apply to the terms
				  used in this chapter:
(1) "Bulk resin"
				means a resin which is produced by a polymerization process in which no water
				is used.
(2) "Dispersion resin"
				means a resin manufactured in such a way as to form fluid dispersions when
				dispersed in a plasticizer or a plasticizer and diluent mixture.
(3) "Ethylene dichloride plant" includes any
				plant which produces ethylene dichloride by reaction of oxygen and hydrogen
				chloride with ethylene.
(4)
				"Ethylene dichloride purification" includes any part of the process of ethylene
				dichloride production which follows ethylene dichloride formation and in which
				finished ethylene dichloride is produced.
(5) "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.
(6) "Inprocess wastewater" means any water
				which, during manufacturing or processing, comes into direct contact with vinyl
				chloride or polyvinyl chloride or results from the production or use of any raw
				material, intermediate product, finished product, by-product, or waste product
				containing vinyl chloride or polyvinyl chloride but which has not been
				discharged to a wastewater treatment process or discharged untreated as
				wastewater.
(7) "In vinyl chloride
				service" means a piece of equipment that contains or contacts either a liquid
				that is at least 10% by weight vinyl chloride or a gas that is at least 10% by
				volume vinyl chloride.
(8) "Latex
				resin" means a resin which is produced by a polymerization process which
				initiates from free radical catalyst sites and is sold undried.
(9) "Polyvinyl chloride plant" includes any
				plant where vinyl chloride alone or in combination with other materials is
				polymerized.
(10) "Reactor" means a
				vat or vessel, which may be jacketed to permit temperature control, designed to
				contain chemical reactions.
(10m)
				"Run" means the net period of time during which an emission sample is
				collected.
(11) "Slip gauge" means
				a gauge which has a probe that moves through the gas to 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.
(11m) "Standard operating procedure" means a
				formal written procedure officially adopted by the plant owner or operator and
				available on a routine basis to those persons responsible for carrying out the
				procedure.
(12) "Stripper" includes
				any vessel in which residual vinyl chloride is removed from polyvinyl chloride
				resin, except bulk resin, in the slurry form by the use of heat or vacuum, or
				both. In the case of bulk resin, stripper includes any vessel which is used to
				remove residual vinyl chloride from polyvinyl chloride resin immediately
				following the polymerization step in the plant process flow.
(13) "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.
(14) "Vinyl chloride plant" includes any
				plant which produces vinyl chloride by any process.
(15) "Vinyl chloride purification" includes
				any part of the process of vinyl chloride production which follows vinyl
				chloride formation and in which finished vinyl chloride is produced.
(16) "Vinyl chloride reactor" includes any
				vessel in which vinyl chloride is partially or totally polymerized into
				polyvinyl chloride.
(17) "Vinyl
				chloride reactor opening loss" means the emission of vinyl chloride occurring
				when a reactor is vented to the atmosphere for any purpose other than an
				emergency relief discharge as defined in ss.
				NR
				449.06(1) (c) and
				449.07(1).
(18) "Wastewater treatment process" includes
				any process which modifies characteristics such as biological or chemical
				oxygen demand, total suspended solids, or pH, usually for the purpose of
				meeting effluent guidelines and standards, but does not include any process the
				purpose of which is to remove vinyl chloride from water to meet requirements of
				this chapter.