engineering controls and containment devices quizletengineering controls and containment devices quizlet

0000011279 00000 n Recycling equipment must be well-maintained and regularly monitored to ensure it is removing lead effectively. Waagbo, S. and McPhee, W. 1991. These controls focus on the source of the hazard, unlike other types of controls that generally focus on the employee exposed to the hazard. NIOSH. The various environmental controls include: Exposures may result from the release of dust and paint-chip particles when these items are removed with a prybar or cut with a saw. Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. You will be subject to the destination website's privacy policy when you follow the link. Abrasives used for injection include sand and slag materials, as well as soluble abrasives such as sodium bicarbonate. The cable splicing performed by electrical utility workers and utility contractors is another example of the use of lead pots. Filtered materials as well as other waste and debris should be placed in appropriately labeled, 6-mil plastic bags or sealed containers suitable for the transport of lead waste, and stored in a secure area pending disposal in accordance with State and/or local requirements. Another good opportunity to use elimination and substitution is when selecting new equipment or procedures. 0000020258 00000 n They help us to know which pages are the most and least popular and see how visitors move around the site. In addition, the volume of water required is reduced, with less than five gallons per minute typically used. The tank should be kept under negative pressure to remove the dust from the tank whenever workers are inside. OHS Meaning (Occupational Health And Safety)? Employees must also wash their hands and faces prior to eating, drinking, using tobacco products, or applying cosmetics, and they must not eat, drink, use tobacco products, or apply cosmetics in any work area where the PEL is exceeded. Dust generation is minimal, but dust can escape when cleaning areas are of difficult configuration because it may not be possible to maintain a seal between the tool and the surface in these areas. Mini-enclosure containment structures are usually light-weight, low wind-loading structures that isolate that area where blasting and surface priming is taking place on a given day. The use of this method is limited by the ability of the shears to reach the cutting area. The three principal projects involving the handling of lead shot, bricks, or sheets and lead-foil panels include the construction of linear accelerator suites, radiology (x-ray) suites, and industrial processing tanks. Use of ventilation system like fume hoods, snorkels, etc. Non-ventilation engineering controls can also include devices developed for the pharmaceutical industry, including isolation containment systems. Partial or full containments can be used to contain entire structures or portions thereof. In addition, the coating being worked on may consist of several layers of lead-based paint, each of which could contain as much as 50% lead. Use techniques with known low exposure potential such as encapsulation and removal/replacement instead of hand scraping with a heat gun. Interlock systems for lasers and machinery are other good examples of isolating processes. These cookies may also be used for advertising purposes by these third parties. Legionnaire's Disease, see OSHA's Safety and Health Topics Page for updated information. maintaining aseptic environment within the isolator, For a CAI, Net displacement of air is OUT of isolator by, For a CACI, Net displacement of air IN into isolator by, CACIs (compounding aseptic containment isolator) is mostly used for, What is the correct cleaning sequence for a vertical flow hood, Pole and hooks This system uses an expendable abrasive that is metered into a pressurized water jet (6,000 to 25,000 psi) for surface preparation. Administration - implementing safe work procedures, housekeeping policies, training, and supervision to improve chemical safety. 0000020586 00000 n Blast cleaning with recyclable abrasive such as steel grit or aluminum oxide requires specialized equipment for vacuuming or collecting the abrasive for reuse, separating the lead dust and fines from the reusable abrasive, and, in the case of steel grit, maintaining clean, dry air to avoid rusting of the abrasive. Examples of engineering controls are safe needle devices or lab equipment like sealed centrifuge rotors. /T1_5 11 0 R dry hand-scraping, removal, and replacement of building components, heat-gun removal, chemical stripping of lead-based paint, and encapsulation). The initial cost of engineering controls can be higher than some other control methods, but over the longer term, operating costs are frequently lower, and in some instances, can provide a cost savings in other areas of the process. In addition, these measures will minimize employee exposure to lead after the work shift ends, significantly reduce the movement of lead from the worksite, and provide added protection to employees and their families. In addition to the work practice controls previously described in Section B, the employer must provide training and information to employees as required by OSHA's lead in construction (. Engineering control can also be said to be is a piece of equipment, a machine, or mechanical device designed to minimise the harm associated with a hazard. Health hazards in this operation come from lead dust and paint chips created during tool use. OSHA's lead standard for construction applies to any construction activity that potentially exposes workers to airborne concentrations of lead. Work surface. 2VzXi\^E ?_[ /Type /Page Because most field soldering and brazing work is conducted with a torch, it is difficult to regulate operating temperatures to within recommended limits to reduce the amount of metal fumes generated. /Font << 0000019820 00000 n 0000014166 00000 n Productivity can be high with this method if the objective is to remove only loose, flaky paint. OSHA has found that appropriate work practices can be a vital aid in lowering worker exposures to hazardous substances and in achieving compliance with the PEL. Local exhaust ventilation, which includes both portable ventilation systems and shrouded tools supplied with ventilation, is generally the preferred method. Process gases are compressible; liquids are not. Vacuum Blasting Lead-Based Paint Structures. Until the employer performs an employee exposure assessment and determines actual employee exposure, the employer must assume that employees performing one of these tasks are exposed to the levels of lead indicated for that task in this Appendix. In this type of blasting, the blast nozzle has local containment (a shroud) at its end, and containment is usually accomplished through brush-lined attachments at the outer periphery and a vacuum inlet between the blast nozzle and the outer brushes. Because substitute materials can also be hazardous, employers must obtain a Material Safety Data Sheet (MSDS) before a material is used in the workplace. Summary of Secondary Engineering Controls Required for Each Classification of Compounded Sterile Preparation (CSP) Type of CSP per USP Chapter <797> ISO Class Requirement Segregated Compound- Because of the water, little dust is generated. 0000015403 00000 n /GS1 14 0 R If device is moved Engineering controls are built into equipment or processes to minimize hazards. For problems with accessibility in using figures and illustrations in this document, please contact the Office of Science and Technology Assessment at (202) 693-2095. If surfaces are peeling or deteriorating and scraping is necessary prior to encapsulation, this method will produce lead dust and paint chips. 0000012158 00000 n The abrasive also conditions the substrate, forming a "profile" of the metal, which improves the adherence of the new paint. The current OSHA lead standard for construction (29 CFR 1926.62) is unique in that it groups tasks presumed to create employee exposures above the PEL of 50 g/m3 as an 8-hour TWA. These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. Recommended/feasible engineering controls (e.g., isolation, substitution, change of process, wet methods, local exhaust ventilation, general ventilation) are then discussed for each task or operation, along with work practice controls that are unique to these activities. /ProcSet [/PDF /Text] Lead-Related Construction Tasks and Their Presumed 8-Hour TWA Exposure Levels, Severe Storm and Flood Recovery Assistance, OSHA Technical Manual (OTM) - Section V: Chapter 3. Lint free towels or wipes are to be used to wipe the surface of the PEC. You can review and change the way we collect information below. While elements of the PPE program depend on the work process and the identified PPE, the program should address: Employers should not rely on PPE alone to control hazards when other effective control options are available. Containment structures that are provided with negative-pressure dilution ventilation systems to reduce airborne lead concentrations within the enclosure, increase visibility, and control emissions of particulate matter to the environment. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. Blowing with compressed air is generally prohibited as a cleaning method, unless the compressed air is used in conjunction with a ventilation system that is designed to capture the airborne dust created by the compressed air (e.g. Ensure that workers avoid the smoke plume by standing to the side or upwind of the cutting torch whenever the configuration of the job permits. When considering a substitute, its important to compare the potential new risks of the substitute to the original risks. Controlling exposures to hazards in the workplace is vital to protecting workers. You can compound non-hazardous materials in hazardous areas but not the other way around, Initial installation Bags and containers must be labeled to indicate that they contain lead-containing waste. 1993a. If the objective is to remove tight paint, productivity may be low. airlock chamber. Figure V:3-1. with a less hazardous one. This chapter provides OSHA compliance officers and safety and health professionals with general information on the types of construction activities involving worker exposure to lead and the feasible engineering and work practice controls to reduce these exposures. Hand scraping of lead-based paints involves the use of a hand-held scraping tool to remove paint from coated surfaces. Speciality contractors are hired to do this work. Health Hazard Evaluation Report. Typically, five to ten gallons of water per minute are used. However, the advantage of sodium bicarbonate is that the abrasive is water soluble and, if the lead can be filtered from the water, the volume of debris is reduced because the dissolved bicarbonate is not considered hazardous. You can review and change the way we collect information below and Topics. Of ventilation system like fume hoods, snorkels, etc under negative pressure to remove paint. Slag materials, as well engineering controls and containment devices quizlet soluble abrasives such as encapsulation and removal/replacement instead of scraping. In this operation come from lead dust and paint chips created during tool use into or... Information below the substitute to the accuracy of a non-federal website with less than five gallons per minute are.!, the volume of water per minute typically used fume hoods, snorkels, etc and content you! 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