Metal Finishing Guide Book


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OSHA is concerned with employee health and safety. Familiarization with the following OSHA codes and the booth design and safety requirements that each governs is important. The relevant OSHA codes are OSHA 1910.107 Spray Finishing, OSHA 1910.94 Ventilation and OSHA 1910.95 Noise Exposure. OSHA relies on the current National Fire Prevention Association (NFPA) Bulletin 33 to formulate guidelines on fire prevention. In addition to NFPA-33, OSHA also bases compliance decisions on the electrical guidelines outlined in the current NFPA-70 (National Electrical Code). For guidelines on the acceptability of certain spray booth components, OSHA refers to Underwriters Laboratory (UL), ETL Testing Laboratories (ETL), Factory Mutual (FM), and Industrial Risk Insurers (IRI). These organizations evaluate equipment according to fire and safety standards. The Environmental Protection Agency regulates the allowable amount of toxic material in exhaust stack emissions, liquid, and solid waste streams. The EPA has no jurisdiction over booth design, which is designated by NFPA-33. State Agencies Federal agencies, such as OSHA, often maintain state offices to enforce their own federal regulations and to administer any state mandated variations in those regulations. Also, each state has an environmental agency (such as Georgia Environmental Department) that conducts a review of all installations. The purpose of the review is to obtain a disclosure or prediction regarding the level of pollutants the booth will emit. If the level is acceptable, the state agency issues a permit to operate an air contaminant source. If the pollutant level is unacceptable, the agency may deny the permit, require the use of exhaust air treatment equipment, or require the use of a different coating material. Filing an application for a permit to operate an air contaminant source can cause delays in installing and operating the equipment. The permit to operate is needed before the equipment can be used, and often before installation and assembly can begin. The application forms are usually complicated, and when completed the application is subject to administrative review before approval. Local Agencies City and county authorities conduct code inspections to evaluate hardware and installation methods for compliance with OSHA, NFPA-33 (Spray Applications), NFPA-70 (National Electrical Code), and any local ordinances. Some municipalities are now writing EPA compliance into their local ordinances as well. The burden of compliance falls on the end user. Ignorance of the regulations and procedures is not a defense against prosecution, and penalties for noncompliance are becoming more severe. Become familiar with all the agencies having jurisdiction, including the environmental agency review and application requirements. Spray Booth Classifications Spray booth classifications are outlined in NFPA-33. NFPA classifies booth areas according to the types of electrical equipment and other possible ignition sources that can safely be used within those areas. Class I covers flammable gases and vapors and Class II covers combustible dusts. Divisions 1 and 2 cover locations in the classified area in which these 772

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