25-REHABILITATION OF THE EAST ELEVATED STORAGE TANK

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SSPC-Guide 6 October 1, 2004 SSPC: The Society for Protective Coatings TECHNOLOGY GUIDE NO. 6 Guide for Containing Surface Preparation Debris Generated During Paint Removal Operations 1. Scope 1.1 This guide describes methods of paint removal, con- tainment systems and procedures for minimizing or preventing emissions from escaping the work area, and procedures for assessing the adequacy of the controls over emissions. 2.2 OUTLINE OF GUIDE 2.2.1 Procedures Included in this guide: • Selecting Methodsof Surface Preparation and Debris Collection (Section 4.1) • Specifying Containment Systems (Section 4.2) • Selecting Methods for Assessing the Quantity of 1.2 The containment systems are categorized in up to four classes per type of paint removal method, based on the extent to which emissions are controlled. 1.3 This guide is primarily intended for use with steel structures; however, some of the methods and materials may be suited for use on concrete, aluminum, wood, or other ma- terials of construction. 1.4 This guide is intended to be used by facility owners, specifiers, designers, and contractors. It may also be used by other interested parties. 1.5 A discussion of ventilation is included in the guide to assist users in both controlling emissions to the environment, and in enhancing worker protection and visibility within the containment. It is important to recognize that ventilation systems alone may or may not be sufficientto fully protect workerswhen the paint being removed contains lead or other toxic metals, and additional work practice and/or administrative controls and respiratory protection may be required to control worker exposures. Requirements or evaluation methods for worker health and safety are outside the scope of this guide. 2. Description and Definitions 2.1 GENERAL: During surface preparation, airborne particulate and debris from the removal of paint (particularly paints containing lead, cadmium, and chromate pigments) can contaminate the air, soil, and water surrounding work sites. The potential environmental hazards are reduced by minimiz- ing or eliminating the airborne particulate, and by containing and collecting the debris. Controlling airborne particulate and other emissions may be necessary to comply with Federal, state, and local regulations. Emissions (Section 4.3) • Implementing Containment Project (Section 4.4) 2.2.2 The guide also includes descriptions and comen- taries on: • Methods of Coating Removal (Section 5.1) • Methods of Cotlecting Debris (Section 5.2) • Containment Enclosure Components (Section 5.3) • Ventilation System Components (Section 5.4) • Methods for Assessing Quantity of Emissions and Methods of Assessing Efficiency of Debris Collection and Bulk Abrasive Recovery (Section 5.5) 2.3 DEFINITIONS 2.3.1 Action Level for Lead: Employee exposure, without regard to the use of respirators, to an airborne concentration of lead of 30 micrograms per cubic meter of air (30 Ng/m3) calculated as an eight-hour TWA per OSHA General Industry Standard 29 CFR 1910.1025 and OSHAConstruction Industry Standard 29 CFR 1926.62. 2.3.2 Containment System: A containment system in- cludes the cover panels, screens, tarps, scaffolds, supports, and shrouds used to enclose an entire work area or a paint removal tool. The purpose is to minimize or prevent the debris generated during surface preparation from entering into the environment, and to facilitate the controlled collection of the debris for disposal. Containment systems may also employ the use of ground covers or water booms. 2.3.3 Emfssions: When used inthis guide, emissions from the containment that require control include airborne plumes of material, as well as spills or leaks of water, abrasive, paint chips, and debris. 509 9-1