SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 361.61 - DEFINITIONS

As used in this subpart, all items not defined herein shall have the meaning given them in Subpart A of this regulation.

(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 plasticizer/diluent mixtures.

(3) "Emergency Relief Discharge" is a discharge which could not have been avoided by taking measures to prevent the discharge.

(4) "Ethylene Dichloride Plant" includes any plant which produces ethylene dichloride by reaction of oxygen and hydrogen chloride with ethylene.

(5) "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.

(6) "Grade of Resin" means the subdivision of resin classification with no further subdivision.

(7) "In Vinyl Chloride Service" means that a piece of equipment contains or contacts either a liquid that is at least 10 percent by weight vinyl chloride or a gas that is at least 10 percent by volume vinyl chloride.

(8) "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, byproduct, 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.

(9) "Latex Resin" means a resin which is produced by a polymerization process which initiates from free radical catalyst sites and is solid undried.

(10) "Polyvinyl Chloride Plant" includes any plant where vinyl chloride alone or in combination with other materials is polymerized.

(11) "Reactor" includes any vessel in which vinyl chloride is partially or totally polymerized into polyvinyl chloride.

(12) "Reactor Opening Loss" means the emissions of vinyl chloride occurring when a reactor is vented to the atmosphere for any purpose other than an emergency relief discharge.

(13) "Run" means the net period of time during which an emission sample is collected.

(14) "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.

(15) "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.

(16) "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 and/or vacuum. 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.

(17) "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.

(18) "Vinyl Chloride Plant" includes any plant which produces vinyl chloride by any process.

(19) "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.

(20) "Wastewater Treatment Process" includes any process which modifies characteristics such as BOD, COD, TSS, and pH, usually for the purpose of meeting effluent guidelines and standards: it does not include any process the purpose of which is to remove vinyl chloride from water to meet requirements of this subpart.