OSHA standard 29 CFR 1910.146 (c) subsection (C) states: Before an employee enters the space, the internal atmosphere shall be tested with a calibrated gas detector, for the following conditions in the order given: (1) oxygen content, (2) flammable gases and … OSHA's confined space standard 1910.146 states that before an employee enters a permit-required confined space, "the internal atmosphere shall be tested, with a calibrated direct reading instrument, for the following conditions in the order given: (1) oxygen content, (2) flammable gases and vapors and (3) potential toxic air contaminants." Common gas hazards in confined spaces. Posted by Mindy W. on Aug 9th 2018. confined space can result in injuries or death by asphyxiation or as a result of an explosion. Get contact details and address| ID: 3679614012 Section 18 - Confined Spaces Regulation (O. Reg. These Detectors will warn the user by audible, visual and vibrating alarm of a gas hazard. Oxygen content should be less than 23% but maintained at levels greater than 19.5%. There is also a motion sensor that sounds an alarm if the user becomes disabled. However, they are limited to just 4 sensors, usually without the ability to … More importantly, 60,000 PPM of any toxic gas will kill you This entrant training requirement includes rescuers. To ensure that the air in a confined space is safe to breathe, it will be important for responders to test the oxygen levels before they enter the location. Gas checks prior to entering a confined space can be carried out by lowering your gas monitor via a drop line. Supersedes: UNMC 2002 . RKI's high quality safety instrument for personal protection. Gas detection manufacturers produce instruments with a variety of sensor configurations. an unsafe oxygen level, or. (1) ATMOSPHERE LIMITS. The oxygen sensor continually monitors the oxygen level in the enclosed area. A space is a confined space if it is: Elevated levels of carbon monoxide or hydrogen sulfide are deadly. Approving the Confined Space Entry Form/Risk Assessment. - 4-gas monitors are great solutions for most confined space applications. XT-X000-Y-NA - GasAlertMax XT 4-Gas Detector for O2 (Oxygen). It is important to test the air inside confined spaces for oxygen as well as toxic and flammable gases prior to entry. Use a suitable detector to determine whether the confined space contains a safe oxygen level for breathing. An elevated level of oxygen can be highly explosive. Confined Space Programs RES 202-PPT-2-1-6 Attendant communicating with the entrants working inside the confined space. Vasthi Engineers Portable Confined Space Monitor offer the latest and most innovative monitors available for confined Space Entry (CSE). An elevated level of oxygen can be highly explosive. JJS Technical Services 1900 East Golf Rd., Suite 950 Schaumburg, IL 60173 1-866-4 JJSTECH (1-866-455-7832) sales@jjstech.com Following pre-entry checks, workers need to be protected upon entering confined spaces. A Confined Space can become a Permit Required Confined Space with presence of the following factors: A hazardous or potentially hazardous atmosphere; Potential for engulfment or suffocation (basically robbing a person of the ability to breathe) Physical hazard(s) (e.g. This is to meet general safety and health considerations and also required in the 2008 NIH Design Requirements Manual (DRM) for Biomedical Laboratories and Animal Research Facilities. Pyrophoric Deposition Ensure the pyrophoric deposition (sludge) is water wetted. The unit uses 3 cells to monitor for the 4 standard confined space gases of H²S, CO, LEL and O². Toxic gas – poisoning hazard. However, guidance in standards, eg BS EN 45544-4 relating to toxic gas detectors, is not comprehensive enough. Gas suppliers in Singapore of Calibration Gas for gas detectors. They usually have the lowest up front cost and are smaller and lighter than other confined space monitors in the market. Oxygen monitoring devices are required in certain other locations under the OSHA confined space regulation. The confined space supervisor is responsible for making sure that Where possible, carry out atmospheric testing without entering the confined space. Workers should have some mobile gas detector or measurer with them to detect the presence of any toxic gas within the space. Gas testing shall be undertaken in accordance with PR-1172 – Permit to Work System Section 3.5 and PR-1148 - Entry into a Confined Space Procedure. The MGT is a small format, confined space gas detector designed for simultaneous monitoring of the following gases: Carbon monoxide 0 – 100ppm; Flammable gases 0-100% LEL; Hydrogen sulphide 0 – 50ppm; Oxygen 0 – 25%VOL Inspection, Maintenance and Repairs - height safety equipment, roof safety systems, confined space rescue equipment Electrical - commercial, residential and hazardous area Aegis Sales & Service is a level 1 service centre for Honeywell BW gas detectors. The unit is available as either a pumped or, as is more common, natural diffusion monitor. Confined space entry gas detection equipment should be used prior to entry to determine hazardous gas levels. Surfaces coated with combustible material should be cleaned or shielded to prevent ignition. locations to continuously monitor oxygen levels. Gas or flammable vapour – fire or explosive hazard. Find here Oxygen Analyzer, O2 Analyzer manufacturers, suppliers & exporters in India. Item Multi-Gas Detector Confined Space Kit; Detects Carbon Monoxide, Combustible, Oxygen; Gas Type CO, LEL, O2; Sensor Range CO 0 to 1000 ppm, LEL 0 to 100%, O2 0 to 30.0%; Resolution CO (1 ppm Increments), LEL (1% LEL Increments), O2 (0.1% Vol. Basic confined space atmospheric monitoring should routinely include oxygen concentration and flammable gases and vapors. The GasAlertMax XT II Confined Space Kit offers all the essential tools required for confined space entry, including a 4-gas detector, calibration and sampling equipment, an IR connectivity kit, and more. So if a gas detector indicates there is an atmospheric hazard, n o entry is permitted. Combustible Gas Meter/Confined Space Meter (CGM) – This instrument is typically used prior to entering a confined space. Besides that, such testing equipment is also used for air monitoring during confined space work in progress. Confined Space Manure Gas Monitoring A gas monitor with remote sampling enables measurements to be taken by workers located safely outside the storage facility. Ensuring all those involved in the confined space entry are trained based on the training requirements outlined in … A confined space means an enclosed or partially enclosed space that: ... an atmosphere that does not have a safe oxygen level, or Confined Space and Vessel Entry Gas Testing: Oxygen deficiency – suffocation / death. Confined Space Entry . It is important to test the air inside confined spaces for oxygen as well as toxic and flammable gases prior to entry. A four gas detector is known as a confined space entry gas detector. Non-permit Required Confined Space: A confined space that does not contain or have the potential to contain any hazard capable of causing death or serious physical harm. Flammable & / or Toxic Atmosphere Ensure the confined space is flushed, purged and thoroughly ventilated as required. Lack of Oxygen Ensure the confined space is free from any flammable / toxic atmosphere and has sufficient oxygen for normal breathing. Internal pump offers quick pre-entry confined space testing. Confined space gas monitor features simultaneous detection of LEL, O2, H2S, CO and option of toxic sensor (SO2, HCN, NO2, NH3 or Cl2). In many workplaces, including those in the oil and natural gas industries, confined spaces are job hazards. This combination of sensor makes for a versatile detector, suitable for dual-use applications such as Confined Space and Purging or Inerting. Great for confined spaces. Combustible gas – To test for levels of flammable or explosive gases. A wide range of toxic level and explosive gas detection products available through Eastern Energy Services for confined space gas detection and explosive environments. Investing in portable detectors that go beyond compliance provides extra confidence that everyone, inside or outside the confined space, may work in safety and live in health. Two common questions we receive about confined space entry have to do with ventilation. Gas detectors serve as a first line of defense in determining the safety of an environment. Warning: Never use oxygen to purge a confined space: this can create a fire and explosion hazard. a1-cbiss supplies a range of confined space entry gas detectors which give you a measure of indication that it is safe for you or your colleagues to enter into an environment. The GfG Audible, Visual Alarm, LCD Display, Confined Space Monitor Monitors Carbon Monoxide, Hydrogen Sulfide, Oxygen & Combustible, -20 to 50°C Working Temp, CSA Listed can be found within the Gas Detectors & Kits category. ALTAIR® 4X & 4XR Multigas Detectors — monitors oxygen, combustible and toxic gases simultaneously • Non-Permit Confined Space - A confined space that does not contain, or with respect to atmospheric hazards, does not have the potential to contain any hazard(s) capable of causing death or physical harm. Data logging is an option on all our multi-gas monitors Atmospheric hazards in a confined space are those that expose entrants to risk such as death, entrapment, injury, or acute illness from one or more of the following causes of gas detector. Ideal for detecting Carbon Monoxide, Flammable gases, Hydrogen Sulphide and Oxygen depletion/enrichment. The 0-100% volume Thermal Conductive sensor in the Riken Model GX-8000 (Type A) additionally allows monitoring of volume levels of combustibles in oxygen-depleted environments and inert gas atmospheres. performed “using Confined Space Entry proceduresprocedures .”. Confined space portable gas detector detect carbon monoxide, hydrogen sulfide, oxygen deficiency and combustible gases. Two common questions we receive about confined space entry have to do with ventilation. Bluetooth communication with iOS & Android App. These are most commonly used prior to entry into a confined space to determine hazardous gas levels. EC-600 Stand alone detector with display, alarm relays, alarms buzzer for Carbon Monoxide. 632/05) 18 (1) The employer shall appoint a person with adequate knowledge, training and experience to perform adequate tests as often as necessary before and while a worker is in a confined space to ensure that acceptable atmospheric levels are maintained in the confined space in accordance with the relevant plan. When should a confined space detector be used? ensure that the confined space is continuously provided with sufficient air to maintain minimum Oxygen concentration of 19.0% to 23% by volume. Make sure that the oxygen content in the confined space is not enriched. Policy Number: Safety 32 . Oxygen enrichment – fire / explosion hazard. However, some may arise through the work being carried out, or because of ineffective isolation of plant nearby, e.g. Gas Monitors. Before entering confined space manure storage, gas detection equipment must be used to determine concentrations of hazardous gases and oxygen … It offers all the essential tools required for confined space entry, including a 4-gas detector, calibration and sampling equipment, IR connectivity kit and more. Warning: Never use oxygen to purge a confined space: this can create a fire and explosion hazard. They utilize a pump to pull the gas sample into the instrument and should be used prior to entering a confined space. Ultra Visibility on Gas Readings When you’re sampling gases in a confined space, you need to constantly watch the readings on your gas detector, and the Honeywell BW™ Ultra makes them easy to see. 00 They may also be lacking in oxygen. RKI's high quality safety instrument for personal protection. Confined spaces pose a variety of risks to your workers - and many of them are invisible until it's too late. In confined spaces this is critical as by definition a confided space is typically difficult to … A confined space can be defined as "a place which is substantially enclosed (though not always entirely), and where serious injury can occur from hazardous substances or conditions within the space or nearby (e.g. A direct reading gas monitor shall be used. Unfortunately, humans cannot sense a reduced Oxygen level. Gas Alert Max XT II confined space. OSHA regulations require the oxygen concentration to be between 19.5 and 23.5 percent and flammable vapors or gases to be below ten percent of the lower explosive limit (LEL). Stand alone Sample Draw (pump) detector with display and alarm relays for Combustibles, Oxygen, Carbon Dioxide and a variety of Toxic Sensors. The GasAlertMax XT II Confined Space Entry Kit is easy to use, easy to carry. This smart plug and play sensor is intended for use in confined space entry and area monitoring applications. “It is a portable gas detector designed for applications where there is a need to detect potentially hazardous or combustible atmospheres in factories, rooms, work areas, and confined … For example: (These numbers can vary slightly from jurisdiction to jurisdiction.) Entry into a confined space means a person’s head or upper body is in the confined space or within the boundary of the confined space. 4 Gas Confined Space BW Flex 4 Whether you’re protecting workers or first responders —in industries from steel and wastewater to paper and pulp — Honeywell BW™ Flex delivers the flexibility you need. These sensors protected the worker from the most common and immediate atmospheric hazards, namely asphyxiation from lack of oxygen; explosion by accidental ignition of such compounds as natural gas, propane or gasoline; and … confined space. A fully trained and compliant senior officer armed with a portable gas detector could look at the lower percentage of oxygen as a potential sign of irregularity in the confined area. A whole new experience in confined-space gas detection. Most confined space instruments include an oxygen sensor, a catalytic (pellistor) sensor for the measurement of percent LEL combustible gas, … Confined space gas detector kits use a remote sampling pump to pull a gas sample into the monitor for assessment. The POLI MP400P is an advanced model with built-in pump that allows a full selection of sensors for a wide range of applications, including Confined Space Entry, while the POLI MP400 is a basic, 4-gas diffusion detector for worker safety at hazardous locations. The MGT confined space gas detectors is the ideal, compact solution for confined space gas monitoring. The aim is to educate people about the risks, understand the dangers and look at what measures can be taken to monitor and provide gas detection … Investing in portable detectors that go beyond compliance provides extra confidence that everyone, inside or outside the confined space, may work in safety and live in health. More than 60% of confined space fatalities involved those who attempted to rescue the first-in workers, who could have been first exposed to gas hazards. Point out all the duct passage and utility channels around the space. A fixed oxygen depletion alarm or oxygen deficiency monitor is an oxygen sensor that constantly monitors a defined space, can control third party systems, and can audibly and visually indicate an incident. Unique Safety Services - Offering Honeywell Confined Space Portable Gas Detectors at Rs 40500/piece in Mumbai, Maharashtra. 27 Oxygen Deficient Atmosphere – An atmosphere containing less than 19.5% oxygen by volume. a1-cbiss supplies a range of confined space entry gas detectors which give you the confidence to ensure that you or your colleagues are entering into a safe environment. is or is likely to be a risk to health and safety from—. Features. Oxygen can be harmful to confined space workers in two ways: deficiency and excess. Easy to use. Confined Spaces and Gas Detection. We have monitors for every budget. Oxygen can be harmful to confined space workers in two ways: deficiency and excess. KSEIBI 423990 Aluminum Confined Space Tripod Kit Manhole Entry and Rescue Equipment Set with 65' Winch, Pulley, Carabiner, Fall Protection Safety Harness and Carrying Storage Bag 5.0 out of 5 stars 4 $1,499.00 $ 1,499 . Honeywell is the global leader in gas detection technology, with the broadest range of sensing technologies developed to protect workers and operations from toxic and combustible gases, VOCs and other gas hazards. The reasons for this should be obvious. Where possible, carry out atmospheric testing without entering the confined space. Optionally the CO and/or H2S sensors can be swapped out for 1 of 9 other toxic gas sensors. Features sensor options for carbon monoxide, hydrogen sulfide, and oxygen … The gas detector includes a plurality of gas sensors, a location module, at least one geometry sensor, a communication module, and a processing unit. xvii) A designated supervisor of the executing agency must be deputed outside the confined space whose sole responsibility will be to watch the safe execution of The disadvantage is that to test a confined space remotely before entry, you'll have to tie a rope to the gas detector and lower it down into the space. workers, observers, rescue personnel (see Appendix 1)). Two of the major issues center on air quality and what you are breathing, both prior to entry and during occupation of a confined space. It is true that a toxic gas will displace the oxygen in a confined space. More than 60% of confined space fatalities involved those who attempted to rescue the first-in workers, who could have been first exposed to gas hazards. OSHA's 1910.134 is the impetus for using a multi-gas monitor to perform atmospheric testing prior to entering a confined space. Oxygen gas detection instruments will typically trigger an alarm when the oxygen level drops below 19.5% volume, the OSHA-mandated level. However, when remote sampling this way, you only need to keep the monitor at a certain layer of the confined space's atmosphere for a couple of seconds to get an accurate sample. Notify Supervisor before the Confined Space Entry Step 3 Verify Confined Space Meter has been calibrated and is in working order Step 4 Complete the top portion of the Permit-Confined Space Entry Form Step 5 Ensure all rescue equipment (e.g. High quality Exd IICT6 Digital RS485 Oxygen Gas Detector For Confined Space from China, China's leading Industrial Gas Detectors product market, With strict quality control Industrial Gas Detectors factories, Producing high quality Exd IICT6 Digital RS485 Oxygen Gas Detector For Confined Space … Confined space gas detector kits use a remote sampling pump to pull a gas sample into the monitor for assessment. Vasthi Instruments Portable Confined Space Monitor offers the latest and most innovative monitors available for confined Space Entry (CSE). Toxic gas levels – Typical confined space monitors have hydrogen sulfide (H 2 S) and carbon monoxide (CO) sensors; additional toxic sensors may be used based on the application. Search. Detect up to 5 gases simultaneously – Confined Space: LEL, O2, H2S, CO – Toxic/IR: HCN, NO2, SO2, and CO2 – H2 Compensated CO sensor. Oxygen Deficiency: Refers to an atmosphere with a partial pressure of Oxygen (PO2) less than 132 mm mercury (Hg). Several breaths and you go down. Additionally, you must monitor oxygen levels to ensure that spaces contain adequate supplies of air. This is standard practice before entering any confined space. Alibaba.com offers 1,629 confined space gas detector products. a1-cbiss supplies a range of confined space entry gas detectors which give you the confidence to ensure that you or your colleagues are entering into a safe environment. Therefore an instrument capable of dealing with these three issues is necessary. The standard in 4 gas confined space monitor rentals, the QRAE Plus is dependable, accurate, and compact. Portable Multi-Gas Detectors are worn by the person either working in the area where multiple gases need to be monitored at the same time, or for confined space entry. When should a confined space detector be used? Use the probe to test the air in a hazardous area before entering. Oxygen. Never try to ‘sweeten’ the air in a confined space with oxygen as this can greatly increase the When monitoring the atmosphere in a confined space, there are several important issues that need to be considered, reviewed, and managed. The confined space kit is for use when remote sampling is required. Rae Systems. Multi-Gas Detector Confined Space Kit, Detects Carbon Monoxide, Combustible, Oxygen Item # 36J674 Mfr. CONFINED Space KIT: RKI GX2012 72-0290-22-A LEL/02/H2S/CO, 10' Hose and Probe, Carrying CASE and Certificate for Free Calibration Service 5.0 out of 5 stars 1 $995.00 $ 995 . While each application of toxic gas detector is usually different from the others, general background information and A confined space air quality testing equipment holds a very important role in ensuring a safe entry. This article focuses on Gas Detection In Confined Spaces – the risks of entering and working in confined spaces and specifically those associated with oxygen depletion/enrichment and/or toxic and flammable gases. In exercise of the powers conferred by section 65 of the Workplace Safety and Health Act, the Minister for Manpower hereby makes the following Regulations: 1. By definition a confined space is any space that is large enough and so configured that an employee can bodily enter and perform assigned work, has limited or restricted means for entry or exit, and is not designed for continuous employee occupancy. There are two types of widely used LEL sensors; catalytic “Wheatstone bridge” or infrared (IR) sensors. Monitors up to 4 gas hazards for confined space entry and remote sampling. Furthermore, our fixed systems can be installed with integral or remote sensors to continuously monitor a confined space and warn personnel when hazardous conditions exist. Except as provided in sub. OSHA dictates that the minimum "safe level" of oxygen in a confined space is 19.5%, while the maximum "safe level" of oxygen in a confined space is 23.5%.. With low oxygen levels being the biggest cause of death in confined spaces, accurate oxygen level measurements are essential. A wide variety of confined space gas detector options are available to you, such as usage, special features. A PID sensor is now available for the Draeger X-am 7000 combustible gas detector. Singapore suppliers of portable and fixed type gas detectors, monitors, MCU panels. The standard multi gas detector monitors Combustible Gases such as Methane (CH4) and LPG, Carbon Monoxide (CO), Hydrogen Sulfide / Sulphide (H2S) and Oxygen (O2). lack of oxygen)." For those working in a confined space where toxic or flammable gas could be present, the use of the correct gas detector can mean the stark difference between life and death. Test the atmosphere for oxygen Use a suitable detector to determine whether the confined space contains a safe oxygen level for breathing. Increments); Housing Color Black; Operating Temp. The unit is available as either a pumped or, as is more common, natural diffusion monitor. This means it can detect and measure CO2, O2, H2S and combustible gasses. 3.3 The workers at a confined space should: • observe the procedures as may be implemented by the proprietor or contractor (sec.13(a) of F&IU(Confined … Most confined space instruments include a fuel-cell type oxygen sensor, a catalytic (pellistor) sensor for the measurement of combustible gas, and one or two electrochemical sensors for detecting specific toxic gases. Model # VK-K1032110111 Gas Detection for Confined Spaces. Elevated levels of carbon monoxide or hydrogen sulfide are deadly. ILHR 32.64 Air quality. the gmi 11-500 gas detector is suited for confined space, reads in %lel, %vol and features (o2) oxygen monitoring Designed for either gas/air or gas/nitrogen/air purging, with the ability to measure oxygen during a nitrogen purge the GMI Gasurveyor 11-500 measures … QRAE rentals come standard with LEL, O2, CO, and H2S sensors installed and calibrated. The employer must identify and label all confined spaces at their facility and take steps to prevent unauthorized entry into them. When testing has determined that the atmosphere is safe, Handheld Confined Space detector (BW Ultra) used for detecting O2, LEL, H2S, and CO. Additional Sensors can be added. A gas detector for use in a confined space is described. The standard configuration monitors for the Lower Explosive Limit (LEL) of combustible gases, Hydrogen Sulfide (H2S), Oxygen (O2) and Carbon Monoxide (CO). The most important feature to look for in a confined space gas detector is 4 gas detection. The Thermal Conductivity volume sensor allows for combustible monitoing in oxygen-depleted / inert gas atmospheres; typlically used for Purging and Inerting applications. However, for worker safety in and around cylinder storage area and in spaces designated as a confined space, a portable detector can be more suited. This is because the space will fill with the substance quicker and ease of exit may be inhibited. Robust, lightweight, sample drawing confined space monitor for combustibles, oxygen and toxic gases (VOL/LEL/O2/CO/H2S). Choosing the right gas detector for confined space work 6/1/2016 - SPI The majority of fatal accidents occurring in confined spaces are related to air problems due to a deficiency or surplus of oxygen, gas behaviour and toxic vapours, explosive levels of products, etc. Portable electronic gas monitors are available to test the levels of both toxic gases and oxygen in a confined space, but it is important to ensure that the monitor you choose will test the level of all the relevant gases. Oxygen depletion can occur in a variety of ways, depending on the type of confined space. See for yourself our detector performance, by conducting confined space atmosphere spot and pre-entry checks with MSA's Portable Gas Detection Instruments. A ‘confined space’ is defined as an enclosed or partially enclosed space that: is not designed to be occupied by a person, and. Prior to entering a Permit Required or Alternate Entry confined space, prepare the gas detector by ensuring the device has been recently calibrated (check manual for … The BW Technologies GasAlertMax XT II Confined Space Entry Kit includes: GasAlertMax XT II 4-gas detector (H2S, CO, O2, %LEL) Monitors up to 4 gas hazards for confined space entry and remote sampling. Fires and explosions Combustible gases have an explosive range with a lower explosive limit ( LEL ) and an upper explosive limit ( UEL ) . Find many great new & used options and get the best deals for BW GasAlert MAX-XT II Multigas Monitor Detector W/ New Oxygen, Confined Space at the best online prices at … within a confined space or assisting with such work from immediately outside the confined space (sec.11(1) of F&IU(Confined Spaces) Reg.). Confined space gas detector kits use a remote sampling pump to pull a gas sample into the monitor for assessment. Oxygen can also be used up by rusting metal, combustion, or bacteria-digesting sewage. Get contact details & address of companies manufacturing and supplying Oxygen … toxic gases and oxygen encountered in tunnels. Portable instruments are the de-facto standard for confined space entry and are used by teams of people to sample and enter sewers, tanks, pits and other such locations. SENSIT® GOLD G2 Multi-Gas Detection Instrument is used for gas leak surveys, gas leak pinpointing, gas pipe purging and confined space applications. The confined space atmosphere shall be tested to determine whether dangerous air contamination and/or oxygen deficiency exists. Oxygen can also be used up by rusting metal, combustion, or bacteria-digesting sewage. Ideal for confined spaces, spot leak testing and mobile use, Honeywell’s portable gas detectors provide real-time visibility into the status and safety of hazardous-area workers, helping companies respond faster, more knowingly and decisively to safety incidents. World's smallest and lightest portable multi 5 gas detector. Designed for superior lifespan—patented sensors operate for over two years—and high performance, the ALTAIR Single-Gas Detector is the smart choice for market-leading, cost-effective gas monitors. The site was quite noisy, so I couldn’t hear the gas detector alarming but I could see the lights on the detector flash-ing. Smallest & lightest detector 2.9″ W x 2.6″ H x 1.06″ D , 4.58 ounces. You can adjust the alarm trigger points to suit your environment. Tests shall be for oxygen content and hydrocarbons / toxics. The enclosed working space may also give rise to other dangers due to the work being carried out. Blog Search. Several gases are frequently found in confined spaces and should be included in any effective confined space gas monitoring program. The monitors use patented design to ensure they are the most durable monitor available on the market. A confined space is determined by the hazards associated with a set of specific circumstances and not just because work is performed in a small space. In order to enter any confined space without the use of special types of PPE, such as a self-contained breathing apparatus (SCBA), atmospheric conditions must have ... oxygen content between 19.5 percent and …
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