La. Admin. Code tit. 33 § III-2151
Cleaning Activity- physical removal of foreign material from a substrate being cleaned. It includes such actions as wiping, brushing, flushing, or spraying.
Cleaning Classification- cleaning is considered to have three main classifications:
Cleaning of External Surfaces- solvent is applied to the external surface being cleaned (as contrasted to the interior of tanks or pipes). Surfaces that fall within this classification include rollers in printing machines, wings of airplanes, floors, tables, and walls. The cleaning activities applied to the external surface may include wiping, brushing, mopping, or spraying.
Cleaning of Internal Surfaces/Containers- solvent is applied to an interior surface for cleaning. Surfaces may include the inside of tanks/vessels, batch reactors, columns, heat exchangers, paint spray booths, and fuel tanks. The cleaning activities applied may include flushing, agitation, spraying, mopping, or brushing. Any combination of activities may be used, depending upon the shape and size of the unit operation and upon the type of residue that is being removed.
Cleaning of Parts-s olvent engulfs the entire surface of the part as it is dipped into a container of solvent or the part is cleaned above the container by a cleaning activity such as spraying or wiping. Equipment or the unit operation where this might take place includes part washers, batch-loaded cold cleaners, ultrasonic cleaners, and spray gun washers.
Cleaning of Removable Parts- solvent engulfs the entire surface of the part as it is dipped into a container of solvent or the part is cleaned above the container by a cleaning activity such as spraying or wiping. Equipment or the unit operation where this might take place includes part washers, batch-loaded cold cleaners, ultrasonic cleaners, and spray gun washers.
Cleaning Practice- a repeated or customary action that is specific to an industry. An example is nightly maintenance of a spray booth in an automobile assembly plant.
Cleaning Tool- an item used to aid cleaning, such as a wiping rag, a brush, a scraper, or a water jet.
Closed-Loop Recycling (In-Process Recycling)- reuse or recirculation of a chemical material within the boundaries used to develop a material balance around a unit operation system. A recovery or regeneration (R and R) unit operation may be within the boundaries selected for the primary unit operation system if it is:
Hazardous Air Pollutant (HAP)- any of the substances identified in LAC 33:III.5115.
In-Process Recycling- see Closed-Loop Recycling.
Line Flushing- the procedure of completely cleaning out a large paint circulating system such as those found at auto assembly plants. The system includes the paint mix tanks and perhaps hundreds of feet of piping. This procedure is only necessary when a system is inadvertently contaminated or for a routine color change. (Although the system is essentially a closed loop, some losses can occur during the flushing; i.e., through various vents, from transfer operations, and from the paint mix tanks.)
Material Balance- the sum of all materials entering a system equated to the sum of all materials leaving the same system. Emissions from storage vessels shall be included.
Net Usage- the net usage (U) of solvent, in appropriate weight units, shall be calculated on a monthly basis as follows: opening solvent inventory (A), plus any estimated opening in-process solvent inventory (B), minus the closing solvent inventory (C), minus any closing in-process solvent inventory (D), minus the corrected waste solvent collected during the month, corrected by subtracting the amount of water and solid contaminants (W), i.e., U = A + B - C - D - W.
Off-Site Recycling- an R and R unit operation system located outside of the plant boundaries.
On-Site Recycling- an R and R unit operation located within the plant boundaries from which waste solvent is returned to a process other than that which generated the waste solvent. A material balance for the R and R unit operation (distillation, filtration, etc.) shall be developed independently. (See Storage Container.)
Pollution Prevention- practices or process changes that decrease or eliminate emissions (or wastes) at the source. Such prevention techniques include the use of new materials, modification of equipment, and changes in work practices.
Product Substitution- replacement of any product or raw material intended for an intermediate or final use, with another. This substitution is a source reduction activity if either the VOC emission or the quantity of waste generated is reduced.
Purging- the process wherein individual paint applicators and portions of paint delivery lines are emptied of one color paint, cleaned, and filled with another.
Reclaim- process or regenerate a material to recover a usable product. (See Recycled.)
Recovery or Regeneration (R and R) Unit Operation- a device for purifying solvent that may use any of a variety of techniques, including extraction, distillation, filtration, adsorption, or absorption.
Recycled- used, reused, or reclaimed. A material is used or reused if it is employed as an ingredient (including its use as an intermediate) to make a product; i.e., when solvent, recovered by distillation, is reused in the plant.
Reused- see Used or Reused.
Solvent- a substance that has the potential to emit VOCs and the sum of the partial pressures of the VOCs exceeds 1.5 psia at operating conditions.
Source Reduction- any activity or treatment that prevents, reduces, or eliminates the generation of VOC emissions (or waste), including product substitution or elimination and pollution prevention.
Treatment- destruction or degradation of waste using techniques such as combustion or neutralization to produce material that is less toxic and more environmentally benign. (See Recycled.)
Unit Operation- an industrial operation classified or grouped according to its function in the operating environment. Examples include distillation columns, paint mixing vessels (tanks), spray booths, parts cleaners, and printing machines. A unit operation may consist of one or more items of equipment, e.g., both a reactor and a mixing vessel or several mixing vessels. There may be considerable variation in the type of unit operations from one industry to another. (See Unit Operation System.)
Unit Operation System (UOS)- the ensemble of equipment around which a material balance is performed. A UOS includes all possible points/sources from which losses could occur to the atmosphere as a result of its being cleaned. This includes losses from solvent storage, during the dispensing of solvent, and from residual solvent on or in cleaning tools (such as rags). An item of equipment used for cleaning parts is, by definition, a unit operation. Therefore, carry-out losses during removal of cleaned parts is to be considered in a material balance.
Used or Reused- employed as an ingredient (including use as an intermediate) in an industrial process to make a product. (For example, in purifying a waste solvent, distillation bottoms from one column may be used as feedstock to another column.)
Waste Minimization- the reduction, to the extent feasible, of hazardous waste that is generated or subsequently treated and stored. It includes any source reduction or recycling activity undertaken by a generator that results in either the reduction of total volume or quantity of hazardous waste, or both, so long as such reduction is consistent with the goal of minimizing present and future threats to human health and the environment. In order of preference waste minimization activities are: source reduction, recycling, and treatment.
Work Practice- specific human activities within industry that lead to a reduction in VOC emissions (or waste). The activities include increased operator training, management directives, segregation of the waste solvent, and practices that lead to a reduction in cleaning frequency. It does not include the use of specialized equipment, such as solvent dispensers.
La. Admin. Code tit. 33, § III-2151