La. Admin. Code tit. 33 § III-1325
Abrasive Blasting- the operation of cleaning or preparing a surface by forcibly propelling a stream of abrasive material against the surface.
Abrasive Blasting Equipment- any equipment utilized in abrasive blasting operations.
Abrasive Material (Abrasives, Abrasive Media)- any material used in abrasive blasting operations including, but not limited to, sand, slag, steel shot/grit, garnet, CO2, or walnut shells.
Emission Control Equipment- any device or contrivance, operating procedure, or abatement scheme, including, but not limited to, filters, ventilation systems, shrouds, or best management practices, that prevents or reduces the emission of air contaminants from blasting operations.
Enclose- to place tarps, shrouds, or a solid structure on all sides and above an area used for abrasive blasting, or to fully surround a structure to be blasted.
Hydroblasting- abrasive blasting using high-pressure liquid as the propelling force or as the active cleaning agent.
Indoor Abrasive Blasting-abrasive blasting conducted inside of a permanent building equipped with a particulate matter collection system.
Nuisance- any condition of the ambient air beyond the property line of the emission source that is offensive to the senses, or that causes or constitutes an obstruction to the free use of property, so as to unreasonably interfere with the comfortable enjoyment of life or property. In determining whether or not a nuisance exists, the department may consider factors including, but not limited to, the following:
a. the frequency of the emission;
b. the duration of the emission;
c. the intensity and offensiveness of the emission;
d. the number of persons impacted;
e. the extent and character of the detriment to the complainant; and
f. the source's ability to prevent or avoid harm.
Shade Factor-for shrouds, the percent of area impermeable to particles 100 grit or greater, or to sunlight.
Shroud or Tarp -a device that is designed to enclose or surround the blasting activity to minimize the atmospheric dispersion of fine particulates and direct that material to a confined area for subsequent removal and disposal.
Surround-to place tarps, shrouds, or a solid structure on all sides of an area used for abrasive blasting.
Wet Abrasive Blasting-abrasive blasting with the addition of water to the air abrasive stream.
Vacuum Blasting-abrasive blasting in which a seal is maintained between the assembly and the blasting surface, thereby allowing the spent abrasive, surface material, and dust to be immediately collected by a vacuum device, equipped with a high efficiency (at least 95 percent) particulate filtration system.
La. Admin. Code tit. 33, § III-1325