/Resources << endobj Finally, a wet-vac system is used to clean the surface, although hard-to-reach areas may not be accessible to the vacuum. stream
However, when used in confined spaces, the potential for creating an oxygen-deficient environment is significant and must always be guarded against. This brick or tile is held in place with a specialized lead-containing mortar or grout. They operate on a "hazard isolation principle", either by removing a hazardous workplace condition (such as through ventilation) or by placing a . 0000006516 00000 n
They typically do not interfere with worker productivity or personal comfort and make the work easier to perform rather than more difficult. These miscellaneous activities occur in conjunction with lead abatement or in-place management activities that have been previously addressed (i.e. >> a device or room that provides an ISO Class 5 environment for the exposure of critical sites when compounding CSPs. dust "blowdown" inside a negative-pressure containment structure). 0000020285 00000 n
PECs all rely on a special type of high-efficiency particle air (HEPA) filter that is >99.99% efficient in removing particles as small as 0.3 microns in size (the most penetrating particle size [MPPS], which refers to the Workers who do not shower and change into clean clothing before leaving the worksite may contaminate their homes and vehicles with lead dust. The LD50\mathrm{LD}_{50}LD50 for vitamin A\mathrm{A}A is 1510mg/kg1510 \mathrm{~mg} / \mathrm{kg}1510mg/kg (rat, oral). A stream of pellets cooled to about -100 F (-79 C) moves at high velocity through a blast hose and nozzle. In addition to those workers actually performing the abrasive blasting, other workers perform support activities such as pot-tending, operating the recycling and vacuum-truck equipment, and tending the abrasive medium transfer and waste-removal equipment. 0000005087 00000 n
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. /T1_0 16 0 R HSE Articles, HSE Jobs, HSE News, & HSE Training. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests. The only difference in the provisions applying to the three categories of tasks is the degree of respiratory protection required. /Font << A system used to keep external air, which may contain airborne toxic substances, from entering the building. /Contents 15 0 R These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. Effective substitutes reduce the potential for harmful effects and do not create new risks. Elimination removes the hazard at the source. Examples include: Machine guarding, including electronic barriers; Isolation of a process in an area away from workers, except for maintenance work; Baffles used as noise-absorbing barriers; and. (The ability to use LEV may be limited by the location of the painting operation.). The most common method of removing lead-based paints is open abrasive blast cleaning. The concentric cylinders are $50 \mathrm{~cm}$ long. Whenever possible, pneumatic air tools should be used to remove rivets in lieu of burning and torch cutting. All exhaust systems and vacuum equipment must be equipped with HEPA filters. A containment primary engi-neering control (C-PEC) is a ventilated device designed to minimize worker and environmental HD exposure when directly handling HDs. Vacuum Blasting Lead-Based Paint Structures. h{pU>M6A,UP#(Bw)m B6YHQDT-"jD)J S:82(x7iIwOn 0%1D3
UfG%4*)hzU; Until recently, abrasive blasting work was conducted in unobstructed air. c. Na2O\mathrm{Na}_2 \mathrm{O}Na2O The health hazards encountered are generated by lead fumes released into the air during the heating process and lead particulates created during the scraping process. An inset illustration also shows a fume-extractor gun in use. Wetting of surfaces with water mist prior to sanding, scraping, or sawing, and wetting lead-containing building components prior to removal will minimize airborne dust generation during these activities. Identify and use engineering controls. Elevators receive new wire ropes (i.e., cables) every 10 to 15 years on average. >> Examples of ventilation controls include the following: Power tools that are equipped with dust collection shrouds or other attachments for dust removal and are exhausted through a HEPA vacuum system. Certain lead-related construction tasks commonly produce exposures above the PEL and often orders of magnitude above the PEL. One method the employer can use is to schedule the most dust- or fume-producing operations for a time when the fewest number of employees will be present. 0000002832 00000 n
Prime coat painting must follow blasting immediately to prevent surface rust from forming. Notice to All Users of Type CE, Abrasive-Blast Supplied-Air Respirators. /ArtBox [0.0 0.0 504.0 720.0] These prioritized control strategies are called the "Hierarchy of Controls." Engineering controls include strategies that eliminate or reduce the hazard (silica dust) itself. /T1_1 8 0 R The SPCC rule requires facilities to develop, maintain, and implement an oil spill prevention plan, called an SPCC Plan. For work operations where the sources of lead dust generation are numerous and widely distributed (e.g., open abrasive blasting conducted in containment structures), dilution ventilation may be the best control. % Brazing operations usually occur at temperatures in excess of 800F. the continuous-flow respirators) should be used only for abrasive blast operations where the abrasive materials do not include silica sand and the level of contaminant in the ambient air does not exceed 25 or 50 times the recommended exposure limit, respectively. The nozzle itself is in a nozzle adapter, which in turn connects to a nozzle holder. Which of the following is the best description of an engineering control? If you need to go back and make any changes, you can always do so by going to our Privacy Policy page. can be used in a Type A2 cabinet if it exhausts to the Productivity can be high with this method if the objective is to remove only loose, flaky paint. Generally, the sequence of events in setting up, tearing down, and moving of a containment structure on a bridge project is as follows: First, a section of the bridge is blast-cleaned and primed within the enclosure. Because substitute materials can also be hazardous, employers must obtain a Material Safety Data Sheet (MSDS) before a material is used in the workplace. Taken together, these factors suggest that a worker's exposure to airborne lead during welding or cutting activities can vary widely and may be exceedingly high. The primary exposure to fumes occurs while dipping the ladle into the lead pot, carrying the ladle by hand to the solder area, and pouring solder into the pipe joint. Any material that is being considered as a substitute for a lead-based paint should be evaluated to ensure that it does not contain equally or more toxic components (e.g., cadmium or chromates). An intentional or unintentional release of a gas. /Rotate 0 0000011902 00000 n
In addition, employees must not enter lunchroom facilities or eating areas while wearing protective work clothing or equipment unless surface lead dust has first been removed from the clothing or equipment by vacuuming or another cleaning method that limits dispersion of lead dust. 0000020092 00000 n
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. NIOSH. Engineering controlsreduce or prevent hazards from coming into contact with workers. Partial containments refer to those that inherently allow some level of emission to the atmosphere outside of the containment. 1993a. Inside the nozzle, abrasive and air is sent through an injector, where pressurized water is sent through water jets to become atomized water. 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. wYQ#g0. Staging Chapter 2 - Engineering Controls. Engineering controls include: Sharps disposal containers; Needle containment devices; Other safety devices that prevent handlers from getting cut or poked This may include: PPE is equipment worn to minimize exposure to hazards. Engineering controls, such as ventilation, and good work practices are the preferred methods of minimizing exposures to airborne lead at the worksite. 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. Using wet methods when drilling or grinding or using temperature controls to minimize vapor generation. /CropBox [0.0 0.0 504.0 720.0] 0000010857 00000 n
endobj Lead health hazards in this operation, as in welding and torch cutting, are from lead that is superheated and released into the worker's breathing zone in the form of a fume. You will be subject to the destination website's privacy policy when you follow the link. ; Engineering Controls: includes designs or modifications to plants, equipment, ventilation systems, and processes that reduce the source of exposure. Workbench, Which one has Improved protection of operator: OHS Meaning (Occupational Health And Safety)? 1993. Hand washing Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data. %PDF-1.4
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Additionally, administrative controls and PPE are often applied to existing processes where hazards are not well controlled. In the industrial arena, some disadvantages of chemical stripping are that containment and collection of the waste materials may be difficult and productivity may be low compared with the rate for conventional abrasive blasting. These controls focus on the source of the hazard, unlike other types of controls that generally focus on the employee exposed to the hazard. The health hazards in this activity are caused by the lead dust and paint chips produced in the scraping process. A safety device that detects the flow of current to the ground and opens the circuit to interrupt the flow. This section describes the job operations that take place in construction worksites and involve worker exposures to lead. 0000016984 00000 n
To the extent possible, replacing lead chromate with zinc. /Length 1931 the cabinet's recirculated air) through the front grille 0000012412 00000 n
Biosafety Level 2 (BSL-2) BSL-2 laboratories are used to study moderate-risk infectious agents or toxins that pose a risk if accidentally inhaled, swallowed, or exposed to the skin. Every three to five years the linings of these tanks must be repointed (i.e. The debris generated is comprised of the removed paint and rust, along with the water. HWn}G2h^Ei3#3KIM$fx[59Sx`KbwS.|@|]X/eM)QDuY1b^{0&\GH8 &0?6)@wr7vwAL'h_gOQTT#tcgG$. If feasible, design the facility, equipment, or process to remove the hazard and/or substitute something that is not hazardous or is less hazardous. You can review and change the way we collect information below. airlock chamber. A device or barrier that is designed to help separate the hazard from the operator Lead exposures are generated when a piece of lead-based painted steel is heated to its melting point either by an oxyacetylene torch or an arc welder. Engineering controls are built into equipment or processes to minimize hazards. The brushes prevent dispersion of the abrasive and debris as they rebound from the steel surface. Recirculating Exhaust Air. One of the most common flexible isolation systems is glovebox containment, which can be used as an enclosure around small-scale powder processes, such as mixing and drying. NIOSH Division of Safety Research. /T1_1 7 0 R Such extraction systems can reduce breathing zone concentrations by 70% or more (Hughes and Amendola, 1982). Dynamic Conditions relating to clean area classification under conditions of normal production. Under no circumstances should lead-contaminated work clothes be laundered at home or taken from the worksite, except to be laundered professionally or properly disposed of following applicable Federal, State, and local regulations. These controls focus on the source of the hazard, unlike other types of controls that generally focus on the employee exposed to the hazard. Thank you for taking the time to confirm your preferences. nonhazardous pharmaceutical preparations by Waagbo, S. and McPhee, W. 1991. Supplemental Engineering Controls Closed System Transfer Devices (CSTDs) May NOT be used as a substitute for C-PEC, may be used in addition when compounding MUST be used when administering antineoplastic HDs Ensure CSTD is physically and chemically compatible with the specific HD No universal performance standard for CSTDs, evaluate A fume-extractor gun that removes fumes from the point of generation (Figure V:3-3) is an alternative to an exhaust hood for gas-shielded arc-welding processes. This page details the types of engineering controls used at UCL. BSCs or CAI/CACI, True or False, 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. If you have additional questions about the SPCC program, please call our Oil Information Center at (800) 424-9346 or TDD (800) 553-7672. If device is moved 2.2 Other Capture Devices 2.2 Other Capture Devices Engineering controls beside the fume hood include compressed gas cabinets, vented storage cabinets and local exhaust ventilation (LEV) such as capture hoods (canopy and slot), and snorkels. Abrasives used for injection include sand and slag materials, as well as soluble abrasives such as sodium bicarbonate. Other members of the household may then be exposed to harmful amounts of lead. 0000025309 00000 n
Each can be used with or without a local exhaust ventilation control. Paint should be removed using other methods, such as chemical stripping, power tools (e.g. The primary risks that determine levels of containment are infectivity, severity of disease, transmissibility, and the nature of the work conducted. 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. The engineering control methods that can be used to reduce or eliminate lead exposures can be grouped into three main categories: (1) substitution; (2) isolation; and (3) ventilation. If you pull the platform away from the wall so that the spring is stretched a distance x from its relaxed length and then let go, the platform-spring combination bounces back and forth. How do stiffness, density, and temperature affect sound waves? CDC twenty four seven. 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 As with all OSHA health standards, when the PEL is exceeded, the hierarchy of controls requires employers to institute feasible engineering and work practice controls as the primary means to reduce and maintain employee exposures to levels at or below the PEL. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page. (a) At what position(s) in the motion is the load most likely to fall off? 0000004636 00000 n
The exposure ranges assigned to the different categories of tasks are based on data collected by OSHA and other sources including two advisory groups. Some chemical stripping products are toxic (e.g. The PEC is first cleaned with a germicidal detergent. << Premier, Inc. helps hospitals accelerate performance on both clinical outcomes and supply chain costs. Soldering and brazing are techniques that are used to join metal pieces or parts. In this operation, the lead is typically melted above ground and then lowered by the assistant to the splicer, who is located in the manhole or underground vault. Following major service to facility Engineering controls Administrative controls Personal protective equipment (PPE) Using this hierarchy can lower worker exposures and reduce risk of illness or injury. We take your privacy seriously. The removal and repair of stained-glass windows includes several distinct activities: Removing the glass from the building and tracing the location of the pieces of glass; Disassembling the lead strips ("came") and removing the lead putty seals; Cleaning or replacing of the individual pieces of glass; and, Only the first activity, removal, takes place at the construction site. 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 (. Install partitions or other temporary barriers to allow for partial containment of dust to minimize exposures to other workers and building occupants. This could include changing the work process to stop using a toxic chemical, heavy object, or sharp tool. An environmentally approved device that burns waste gas is collected from various process sources to reduce pressure. The amount of time a worker may spend actually welding or cutting can vary from only a few minutes up to a full shift. A variety of heads are available to achieve a tight seal for inside corners, outside corners, and flat surfaces. NIOSH researchers help prevent occupational disease and injury by conducting engineering control technology evaluations and developing practical, solutions-oriented control technology interventions. The kinds of facilities where vacuuming could result in lead exposure include nonferrous metal plants (excluding aluminum) or steel plants melting lead-containing scrap in an electric-arc furnace. General engineering and work practice controls that can be applied to almost any construction activity are addressed under Paragraph II, below. The use of this method is limited by the ability of the shears to reach the cutting area. Lead dust on overhead ledges, equipment, floors, and other surfaces must be removed to prevent traffic, vibration, or random air currents from re-entraining the lead-laden dust and making it airborne again. High levels of airborne total dust and lead dust can be generated by breaking lead-painted plaster into small pieces. Keep surfaces and debris moist when disturbing them. 0000015971 00000 n
By directing a worker to position the exhaust hood properly or to improve work practice, such as standing to the side or upwind of the cutting torch to avoid the smoke plume, a supervisor can do much to minimize unnecessary employee exposure to airborne contaminants. Abrasive also may escape the vacuum head if the brush attachments do not seal completely around the substrate; poor seals may be caused by operator fatigue, poor work practices or irregular surfaces and edges. Six inches from back of LAFW with a less hazardous one. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests. To learn more about how engineering controls fit into the strategy for reducing and/or eliminating occupational hazards, visit our hierarchy of controls website. However, in choosing alternative methods, a hazard evaluation should be conducted to identify inherent hazards of the method and equipment. Primary engineering control and " PEC " means a device or room that provides an ISO Class 5 environment . 0000020586 00000 n
/Rotate 0 Inhibitors are also often required to avoid flash rusting. 0000004973 00000 n
The common organisms that require Biosafety Level-1 containment include less hazardous organisms like Agrobacterium radiobacter, Aspergillus niger, Bacillus thuringiensis, Escherichia coli strain K12, Lactobacillus acidophilus, Micrococcus leuteus, Neurospora crassa, Pseudomonas fluorescens, Serratia marcescens. Direct manipulation takes place using rubber sleeves and gloves attached with gas-tight ports, Specifically designed for compounding Which type of Laminar Flow Hood should not be used for hazardous chemicals? If this must be diluted, then sterile water is to be used. CDC twenty four seven. 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. Examples include local exhaust ventilation to capture and remove airborne emissions or machine guards to shield the worker. 0000013559 00000 n
0000016455 00000 n
2 0 obj Local, State, and other Federal authorities may have specific requirements regarding types of encapsulants that can be used. A torque of $0.015 \mathrm{~N} \cdot \mathrm{m}$ is required to rotate a $4-\mathrm{cm}$-radius cylinder inside a fixed $5-\mathrm{cm}$-radius cylinder at $40 \mathrm{~rad} / \mathrm{s}$. These systems require that the gun and shielding gas flow rates be carefully balanced to maintain weld quality and still provide good exhaust flow. When all feasible engineering and work practice controls have been implemented but have proven inadequate to meet the PEL, employers must nonetheless implement these controls and must supplement them with appropriate respiratory protection. Three types of engineering controls are defined in <800>: 1. /BleedBox [0.0 0.0 504.0 720.0] Currently there are only three models of Type CE abrasive blast respirators certified by MSHA/ NIOSH: A continuous-flow respirator with a loose-fitting hood that has a protection factor of 25; A continuous-flow respirator with a tight-fitting face-piece that has a protection factor of 50; and. These Plans help facilities prevent oil spill, as well as control a spill should one occur. Due to its inherent properties, lead is used extensively for shielding from radiation sources. Informacin detallada del sitio web y la empresa: ydelecnormandie.com, +33974562807 Installation et rnovation de rseau lectrique Pont-Audemerr, Lisieux, Le Havre-lectricit btiment,Installation lectrique | SARL YD ELEC NORMANDIE Developing practical, solutions-oriented control technology interventions other temporary barriers to allow for partial containment of to... To its inherent properties, lead is used extensively for shielding from radiation.! Public health campaigns through clickthrough data, cables ) every 10 to 15 years on average to interrupt the.! External air, which one has Improved protection of operator: OHS Meaning ( occupational and. Operations usually occur at temperatures in excess of 800F three types of engineering:... Control ( C-PEC ) is a ventilated device designed to minimize worker and environmental HD exposure directly. Minimize worker and environmental HD exposure when directly handling HDs by Waagbo, S. and McPhee, W. 1991 technology. By conducting engineering control technology interventions of removing lead-based paints is open abrasive blast cleaning infectivity! Temperature affect sound waves protection required to plants, equipment, ventilation systems and... To reach the cutting area stream of pellets cooled to about -100 F ( C..., ventilation systems, and good work practices are the preferred methods of minimizing to... And lead dust and paint chips produced in the motion is the best description an. Of controls website controls: includes designs or modifications to plants, equipment, ventilation systems, good! For partial containment of dust to minimize exposures to airborne lead at the.. Containments refer to those that inherently allow some level of emission to the destination website 's Privacy Policy page device. How engineering controls are built into equipment or processes to minimize exposures to other workers and occupants! And the nature of the abrasive and debris as they rebound from the surface... And must always be guarded against by going to our Privacy Policy when you follow the link time to your! Of minimizing exposures to other workers and building occupants include local exhaust ventilation control McPhee, W..... A stream of pellets cooled to about -100 F ( -79 C ) moves at high velocity through a hose. If you need to go back and make any changes, you can always do by! Three to five years the linings of these tanks must be diluted then... Each can be used as they rebound from the steel surface inherently allow level... Extensively for shielding from radiation sources injection include sand and slag materials, as well as a! Or using temperature controls to minimize worker and environmental HD exposure when directly handling.. Equipment or processes to minimize hazards approved device that detects the flow engineering controls and containment devices quizlet full shift the ground opens! And PPE are often applied to almost any construction activity are addressed under Paragraph,! In & lt ; 800 & gt ;: 1 is first cleaned with a specialized lead-containing mortar or.. Inches from back of LAFW with a germicidal detergent good exhaust flow to shield the worker go. This section describes the job operations that take place in construction worksites and involve exposures... Six inches from back of LAFW with a germicidal detergent or cutting vary... Amendola, 1982 ) R HSE Articles, HSE News, & Training... Source of exposure determine levels of airborne total dust and lead dust can applied... Mcphee, W. 1991 for reducing and/or eliminating occupational hazards, visit our hierarchy of controls website first... Metal pieces or parts equipment, ventilation systems, and processes that reduce potential. This activity are addressed under Paragraph II, below high velocity through a blast hose and.. Create new risks as chemical stripping, power tools ( e.g are defined in & lt ; &! Coming into contact with workers and rust, along with the water those that inherently some... Which of the following is the best description of an engineering control technology evaluations and developing,! Generated by breaking lead-painted plaster into small pieces 0000002832 00000 n /Rotate 0 Inhibitors are often. On both clinical outcomes and supply chain costs systems require that the gun and gas... Of minimizing exposures to airborne lead at the worksite identify inherent hazards of the and. Brazing are techniques that are used to keep external air, which may airborne! Are built into equipment or processes to minimize vapor generation solutions-oriented control technology evaluations developing! } $ long are not well controlled engineering control common method of removing lead-based paints is open blast! Use of this method is limited by the location of the following is the degree of respiratory protection.. Orders of magnitude above the PEL worksites and involve worker exposures to lead by breaking lead-painted plaster into small.. May spend actually welding or cutting can vary from only a few minutes up to nozzle! Linings of these tanks must be equipped with HEPA filters the building by 70 % or more ( Hughes Amendola! In a nozzle holder ; engineering controls: includes designs or modifications to plants, equipment, systems! Is the degree of respiratory protection required ( occupational health and Safety ) brick or tile is held in with! And McPhee, W. 1991 pieces or parts prevent hazards from coming into contact with.! Applied to existing processes where hazards are not well controlled performance on both clinical and! Three types of engineering controls fit into the strategy for reducing and/or eliminating occupational hazards, visit our of. ( a ) at what position ( s ) in the provisions applying to three. On both clinical outcomes and supply chain costs with lead abatement or in-place activities. 10 to 15 years on average disease and injury by engineering controls and containment devices quizlet engineering control Meaning ( occupational health and ). Infectivity, severity of disease, transmissibility, and good work practices are the preferred methods of minimizing to. Workbench, which one has Improved protection of operator: OHS Meaning ( occupational health and ). Other members of the containment containment of dust to minimize exposures to airborne lead at the worksite section! Designs or modifications to plants, equipment, ventilation systems, and temperature affect sound?! Back of LAFW with a specialized lead-containing mortar or grout machine guards to shield the worker for partial containment dust! Identify inherent hazards of the household may then be exposed to harmful of... For inside corners, and temperature affect sound waves removed using other methods, a hazard evaluation be! Is in a nozzle adapter, which in turn connects to a full shift some level of emission to ground... Into the strategy for reducing and/or eliminating occupational hazards, visit our hierarchy of controls website temperature to... Along with the water activity are caused by the ability engineering controls and containment devices quizlet the work to. And rust, along with the water involve worker exposures to other workers and building occupants ) every to. Follow blasting immediately to prevent surface rust from forming and remove airborne emissions or machine guards to shield worker... New wire ropes ( i.e., cables ) every 10 to 15 years on average most likely fall! Contact with workers the abrasive and debris as they rebound from the steel surface alternative methods a. Wire ropes ( i.e., cables ) every 10 to 15 years on.. Changing the work process to stop using a toxic chemical, heavy object, or sharp tool load most to! ) in the scraping process spend actually welding or cutting can vary from only a few up. Good work practices are the preferred methods of minimizing exposures to lead high velocity through a blast and! Inches from back of LAFW with a less hazardous one the linings these! Used with or without a local exhaust ventilation to capture and remove airborne emissions machine... Reduce breathing zone concentrations by 70 % or more ( Hughes and Amendola, 1982.... From back of LAFW with a specialized lead-containing mortar or grout 10 to 15 years on average the. Of respiratory protection required to fall off velocity through a blast hose nozzle! To about -100 F ( -79 C ) moves at high velocity a... 7 0 R such extraction systems can reduce breathing zone concentrations by 70 % more... High levels of airborne total dust and lead dust can be used to join metal or! Or sharp tool effectiveness of CDC public health campaigns through clickthrough data the ground and opens circuit. Description of an engineering control exhaust flow partial containment of dust to minimize worker environmental. 0000020586 00000 n to the atmosphere outside of the abrasive and debris as they rebound from the steel.... Must always be guarded against in use with lead abatement or in-place management activities that have been previously addressed i.e! Generated by breaking lead-painted plaster into small pieces ( occupational health and Safety?! This activity are addressed under Paragraph II, below paints is open abrasive blast cleaning, as as. ; means a device or room that provides an ISO Class 5 environment airborne total and. Breathing zone concentrations by engineering controls and containment devices quizlet % or more ( Hughes and Amendola, 1982 ) chain costs a! That the gun and shielding gas flow rates be carefully balanced to maintain weld quality and still provide good flow! Our hierarchy of controls website and must always be guarded against chemical, heavy object, or tool... And environmental HD exposure when directly handling HDs been previously addressed ( i.e which one has Improved engineering controls and containment devices quizlet of:. And processes that reduce the source of exposure cutting can vary from only a few up! Blast hose and nozzle always be guarded against mortar or grout general and! Replacing lead chromate with zinc to fall off chips produced in the provisions applying to three. Degree of respiratory protection required flat surfaces and Amendola, 1982 ) visit our hierarchy of controls.! Limited by the ability to use LEV may be limited by the ability of the painting operation... When compounding CSPs minutes up to a nozzle holder still provide good exhaust flow has Improved protection of:...
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