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SSPC-Guide 6
<br />October 1, 2004
<br />evaporation. The softened paint is removed by peeling the
<br />cover or by hand scraping. Washing, flushing, and neutraliza-
<br />tion of the surface may be required, as well as collection of the
<br />rinsings for proper disposal. NOTE: Chemical stripping solu-
<br />tions themselves can be hazardous and may require special
<br />handling and disposal.
<br />5.2 METHODS OF COLLECTING DEBRIS: Methods of
<br />collection include, but are not limited to, the following:
<br />5.2.1 Localized Collection at Point of Cleaning: This
<br />method involves surrounding the coating removal equipment
<br />with a localized containmentenclosure equipped with avacuum
<br />(i.e. localized exhaust) to permit the collection of the debris as
<br />it is being generated. The localized containment or chamber
<br />should conform to the surtace (e.g., to irregularities such as
<br />welds, angles, and appurtenances as well as flat surfaces)
<br />through the use of masks, brushes, or other suitable means
<br />that will minimize the escape of abrasive, dust, paint, or debris.
<br />This method may be more effective in controlling emissions
<br />when used on large open structures such as tank shelis as
<br />compared with complex structures such as joists or trusses.
<br />The vacuum machine may be an integral part of the coating
<br />removal equipment or abrasive reclaimer, or may be a sepa-
<br />rate machine, but coating removal and vacuuming must be
<br />accomplished simultaneously.
<br />5.2.2 General Area Collection: This method of collection
<br />involves the removal of spent abrasive and paint debris from
<br />a containment structure that encloses the work area, workers,
<br />and tools, rather than only enclosing the removal tool itseif.
<br />Collection methods include, but are not limited to:
<br />5.2.2.1 Bulk Collection: Collection of debris from ground
<br />covers, floor, deck, or structure components, either during or
<br />after surface preparation. Collection may inciude the use of
<br />brooms, magnetic brooms, brushes, shovels, wheelbarrows,
<br />buckets, bucket loaders, vacuums, vacuum trucks, conveyors,
<br />or other suitable means. Note that in the case of hazardous
<br />paint removal, OSHA regulations place restrictions on the use
<br />of some of these methods.
<br />5.2.2.2 Channeling: Controlling the flow of debris in the
<br />direction of a central removal location is accomplished by the
<br />use of tarps, rigid panels, augers, funnels, or other suitable
<br />materials or equipment. The materials should be selected with
<br />consideration of the nature of the debris being channelled (e.g.
<br />water, chemical stripper, dry particulate, etc.). At the removal
<br />location, further collection may be accomplished using me-
<br />chanical conveyors, vacuums, orother means. The channelling
<br />materials and equipment may be a part of, or independent of,
<br />the containment structure.
<br />5.2.3 Work Site Collection: This method of collection
<br />involves the removal of spent abrasive and paint debris from
<br />the work site and surrounding property outside of containment.
<br />Collection should occur on a routine basis (e.g., at the end of
<br />each work day, or as specified) to prevent dispersion by wind
<br />or rain. The bulk collection methods described in 5.2.2.1 are
<br />suitable for this purpose.
<br />5.3 CONTAINMENT ENCLOSURE COMPONENTS: The
<br />components of containment enclosures are identified below.
<br />Consideration should be given to the use of flame retardant
<br />materials when applicable. Tables A, W, C, and P provide
<br />guidance on combining each of the components to design a
<br />containment system Specifiers should research local regula-
<br />tions andjobsite conditions regarding the use offlame retardant
<br />materials. NFPA 701 provides an example of the testing that
<br />can be required.
<br />5.3.1 Containment Materials
<br />5.3.1.1 Type A1 - Rigid: Containment materials consist
<br />of single panels, interlocking panels, or modular fabrications
<br />constructed of plywood, aluminum, rigid metal, plastic, or
<br />similar materials.
<br />5.3.1.2 Type A2 - Flexible: Containment materials are
<br />comprised of screens, tarps, drapes, plastic sheeting, or
<br />similar materials.
<br />5.3.2 Penetrability of Containment Materials
<br />5.3.2.1 Type B1 - Air Impenetrable: Materiafs that are
<br />impervious to dust or wind, including, but not limited to:
<br />• Tarps or Drapes: Formed or coated woven material
<br />free of holes or openings.
<br />Plastic Sheeting: Single or double ply, heavy wall
<br />construction plastic. Reinforced plastic may be neces-
<br />sary for some applications.
<br />Panels: Panels of plywood, aluminum, corrugated
<br />plastic, metal, orsimilar rigid materials. NOTE: Open-
<br />ings in materials reduce recovery efficiencies.
<br />5.3.2.2 Type 132a - Air Penetrable-Tightly Woven:
<br />Material that is tig htly woven, but not coated. Material is capable
<br />of retaining airborne particles but because it is not coated, does
<br />not meet the definition of Air Impenetrable. Tightness of the
<br />weave may be compromised with extended use.
<br />5.3.2.3 Type B2b - Air Penetrable-Open Mesh: Materiai
<br />that is formed or woven to allow air flow but that can retain
<br />some airborne particles. NOTE: The design wind loads of air
<br />penetrable materials such as screens are the same as air
<br />impenetrable materials such as tarps. Openings in materials
<br />reduce recovery efficiencies
<br />5.3.2.4 Type 63a - Water Impermeable: Material that is
<br />impermeable to water.
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