Definitions

Definitions. Definitions. The following definitions are applicable to terms used in this chapter. Definitions of other terms and meanings of abbreviations are set forth in chs. NR 205 and 211 , and the Development Document for Effluent Limitations Guidelines and Standards for the Pulp, Paper and Paperboard and the Builders’ Paper and Board Mills Point Source Categories, EPA 440/1-82/025, October, 1982. (1) “Acid sulfite cooking liquor” means sulfite cooking liquor having a pH less than 3.0. (2) “BCT bleached kraft subcategory” includes those mills at which bleached kraft pulp is produced in a full cook process employing a highly alkaline sodium hydroxide and sodium sulfide cooking liquor. (3) “Bisulfite cooking liquor” means sulfite cooking liquor having a pH between 3.0 and 6.0. (4) “Builders’ paper and roofing felt subcategory” includes those mills at which heavy papers used in the construction industry are produced from wastepaper, wood flour and sawdust, wood chips, and rags. Neither bleaching nor chemical pulping processes are employed on-site. (5) “Corrugating medium furnish subdivision” includes those mills in the paperboard from wastepaper subcategory where only recycled corrugating medium is used in the production of paperboard. (6) “Cotton fiber furnish subdivision” includes those mills in the nonintegrated-fine papers subcategory which produce a paper product containing equal to or greater than 4% cotton fibers. (7) “Deink subcategory” includes those mills at which brightened or bleached deinked pulp is produced from wastepapers using an alkaline process to remove contaminants such as ink and coating pigments. (8) “Dissolving kraft subcategory” includes those mills at which a highly bleached pulp is produced by a full cook process employing a highly alkaline sodium hydroxide and sodium sulfide cooking liquor. Included in the manufacturing process is a precook operation termed prehydrolysis. (9) “Dissolving sulfite pulp subcategory” includes those mills at which a highly bleached pulp is produced in a full cook process employing strong solutions of sulfites of calcium, magnesium, ammonia or sodium. (10) “Fine bleached kraft subcategory” includes those mills at which bleached kraft pulp is produced in a full cook process employing a highly alkaline sodium hydroxide and sodium sulfide cooking liquor. (11) “Full cook” means chemical pulping methods which employ the heating under pressure of wood, water and chemicals in a closed vessel to a temperature sufficient to separate the fibrous portion of the wood by dissolving lignin and other nonfibrous constituents. (12) “FWP” means “from wastepaper.” (13) “Groundwood-chemi-mechanical subcategory” includes those mills at which pulp is produced, with or without brightening, utilizing a chemical cooking liquor to partially cook the wood followed by mechanical defribration by refining, resulting in yields of 90% or greater. (14) “Groundwood-CMN papers subcategory” includes those mills at which groundwood pulp is produced, with or without brightening, utilizing only mechanical defribration by either stone grinders or refiners. (15) “Groundwood-fine papers subcategory” includes those mills at which groundwood pulp is produced, with or without brightening, utilizing only mechanical defribration by either stone grinders or refiners. (16) “Groundwood-thermo-mechanical subcategory” includes those mills at which pulp is produced in a brief cook process employing steam, with or without the addition of cooking chemicals, such as sodium sulfite, followed by mechanical defribration by refiners, which are frequently under pressure, resulting in yields of approximately 95% or greater. The pulp may be brightened using hydrosulfite or peroxide bleaching chemicals. Principal products include market pulp, fine papers, newsprint and tissue papers. (17) “Integrated” means a term used to describe a pulp and paper mill operation in which all or some of the pulp is processed into paper at the mill. (18) “Market bleached kraft subcategory” includes those mills at which bleached pulp is produced in a full cook process employing a highly alkaline sodium hydroxide and sodium sulfide cooking liquor. (19) “New source” for direct dischargers means any point source the construction of which commenced after January 3, 1983; and for indirect dischargers means any building, structure, facility, or installation from which there is or may be a discharge of pollutants, the construction of which commenced after January 6, 1981. (20) “Noncontinuous discharger” means a point source which discharges wastewaters pursuant to a WPDES permit which: (a) Prohibits the discharge of pollutants during specified periods of time in excess of 24 hours in duration for purposes other than control of treatment plant upsets, and (b) Specifies that annual average limitations are applicable to such a discharge. (21) “Noncorrugating medium furnish subdivision” includes those mills in the paperboard from wastepaper subcategory where recycled corrugating medium is not used in the production of paperboard. (22) “Nonintegrated-filter and nonwoven papers subcategory” includes those mills at which filter papers and nonwoven items are produced from wood pulp, secondary fibers and nonwood fibers which are prepared at other sites. (23) “Nonintegrated-fine papers subcategory” includes those mills at which fine papers are produced from wood pulp or deinked pulp prepared at other sites. (24) “Nonintegrated-lightweight papers subcategory” includes those mills at which lightweight or thin papers are produced from wood pulp or secondary fibers prepared at other sites and from nonwood fibers and additives. (25) “Nonintegrated-paperboard subcategory” includes those mills at which paperboard is produced from wood pulp or secondary fibers prepared at other sites. Mills at which electrical grades of board or matrix board are produced are not included in this subcategory. (26) “Nonintegrated-tissue papers subcategory” includes those mills at which tissue papers are produced from wood pulp or deinked pulp prepared at other sites. (27) “Paperboard from wastepaper subcategory” includes those mills at which paperboard products are manufactured, without bleaching, from wastepapers including corrugated boxes, box board and newspapers. Those mills at which wastepaper comprises less than 80% of the raw material fibers are not included in this subcategory. (28) “Papergrade sulfite (blow pit wash) subcategory” includes those mills at which sulfite pulp is produced in full cook process employing an acidic cooking liquor of sulfites of calcium, magnesium, ammonia or sodium. Following cooking operations, spent cooking liquor is washed from the pulp in blow pits. (29) “Papergrade sulfite (drum wash) subcategory” includes those mills at which sulfite pulp is produced in a full cook process using an acidic cooking liquor of sulfites of calcium, magnesium, ammonia or sodium. Following cooking operations, spent cooking liquor is washed from the pulp on vacuum or pressure drums. Also included are mills using belt extraction systems for pulp washing. (30) “PCP” means pentachlorophenol. (31) “Production” means the annual off-the-machine production, including off-the-machine coating where applicable, divided by the number of operating days during that year. (32) “Semi-chemical subcategory” includes those mills at which pulp is produced using a process that involves the cooking of wood chips under pressure with a variety of cooking liquors including neutral sulfite and combinations of soda ash and caustic soda. The cooked chips are usually refined before being converted into board or similar products. Sodium base neutral sulfite semi-chemical and ammonia base neutral sulfite semi-chemical mills are included in this subcategory for BPT and NSPS. (33) “Settleable solids” means the amount of settleable matter present in an effluent sample as determined by the test described in “Standard Methods for the Examination of Water and Wastewater,” 15th edition (1980). (34) “Soda subcategory” includes those mills at which bleached soda pulp is produced in full cook process employing a highly alkaline sodium hydroxide cooking liquor. (35) “TCP” means trichlorophenol.