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HomeMy WebLinkAboutPR 689 HS - SELECTION, USE, AND CARE OF RESPIRATORS-1- PR.689.HS TITLE: PROCEDURE PR.689.HS SELECTION, USE, AND CARE OF RESPIRATORS Date issued: 20 November 2018 Last revised: Authorization: Senior Staff: (20 November 2018) 1.0 OBJECTIVE To set out a process for ensuring the health and safety of Ottawa-Carleton District School Board (OCDSB) workers who require respiratory protection during the performance of their work. 2.0 DEFINITIONS In this procedure, 2.1 Assigned Protection Factor (APF) means the workplace level of respiratory protection that a respirator or class of respirators is expected to provide to users. 2.2 Bioaerosol means a suspension of airborne particles that contain living organisms or were released from living organisms. 2.3 Escape Respirator refers to a single use respirator capable of providing a person, working in a normally safe environment with sufficient time to escape from suddenly occurring respiratory hazards. 2.4 Filtering Facepiece Respirator means a NIOSH-certified, negative pressure, particulate respirator with a filter as an integral part of the facepiece or with the entire facepiece composed of the filtering medium. It is different from other respirators because the filtering media itself is the mask. Negative pressure means that the flow of air through the filter is achieved via inhalation. This type of respirators is commonly used for protection against dusts. 2.5 Immediately Dangerous to Life or Health (IDLH) means an atmosphere that poses an immediate threat to life, or that will cause irreversible adverse health effects or impair an individual’s ability to escape. 2.6 Maximum Use Concentration (MUC) means the maximum atmospheric concentration of a hazardous substance from which an employee can expect to be protected when wearing a respirator, and is determined by the Assigned Protection Factor (APF) of the respirator and the exposure limit of the hazardous substance. -2- PR.689.HS 2.7 Oxygen Deficient Atmosphere is an atmosphere containing a concentration of oxygen less than 19.5%. 2.8 Qualified Person means an individual who possesses the knowledge, experience, and training to fulfill the competencies of the role(s) defined in this procedure. 2.9 Respirator User means a worker who is required by the employer, in the course of their employment, to wear a respirator. 2.10 Short Term Exposure Limit (STEL) means the acceptable average exposure without protection over a short period of time, usually 15 minutes, as long as the time -weighted average is not exceeded. 2.11 Supervisor means a person who has charge of a workplace or authority over a worker. 2.12 Worker means any of the following: a) a person who performs work or supplies services for monetary compensation; b) a secondary school student who performs work or supplies services for no monetary compensation under a work experience program authorized by the school board that operates the school in which the student is enrolled; c) a person who performs work or supplies services for no monetary compensation under a program approved by a college of applied arts and technology, university or other post-secondary institution; d) a person who receives training from an employer, but who, under the Employment Standards Act, 2000, is not an employee for the purposes of that Act because the conditions set out in subsection 1 (2) of that Act have been met; or e) such other persons as may be prescribed under the Ontario Occupational Health and Safety Act, who perform work or supply services to an employer for no monetary compensation. 3.0 RESPONSIBILITY 3.1 Supervisor, Occupational Health and Safety Division (OH&S) will: a) maintain and update this procedure, in consultation with the Joint Health and Safety Committee (JHSC) as necessary, at least every three years; b) ensure periodic, formal evaluations of the respiratory protection program are conducted to ensure effectiveness; c) provide support for conducting hazard assessments for respiratory protection; d) retain hazard assessment records; e) provide a means for recording training and fit-test records; and f) provide support for monitoring, sampling, and/or measuring airborne contaminants. -3- PR.689.HS 3.2 Supervisors will: a) consult with the OH&S Division to assist with hazard assessments prior to assigning workers to perform work using respirators; b) submit completed hazard assessments to the OH&S Division for retention; c) consult with the OH&S division, where necessary, to assist with the selection of an appropriate respirator for a worker under th eir supervision (conduct hazard assessment); d) notify the Supervisor, OH&S of any incident where the use of a respirator could have prevented or contributed to an incident or injury; e) ensure that training, screening and fit-test records are retained for each worker issued a respirator; f) monitor respirator use to ensure that the requirements of this procedure are being met; and ensure that any worker under their supervision using a respirator in the workplace: i. completes a Respirator User Screening Form (Appendix A) before being fit-tested for a respirator; ii. is fit-tested to wear the specific make, model and size before issuing the respirator; iii. has received training as outlined in this procedure before wearing a respirator in the workplace; iv. demonstrates competency in using the respirator; and v. uses, maintains, cleans and stores the respirator in accordance with this procedure, the manufacturer’s instructions, training, and safe work procedures; and g) consider requests for accommodations that are submitted by workers based on creed or other grounds protected by the Ontario Human Rights Code, and consult with the OH&S division and other staff as required per Procedure PR.667.HR Religious or Creed-based Accommodations for Employees. 3.3 Workers who are required by the employer in the course of their employment to wear a respirator will: a) participate in respiratory protection training as required; b) complete a Respirator User Screening Form (Appendix A) before being fit-tested for a respirator; c) use a respirator as prescribed by this procedure; d) wear, maintain, store and care for respirators as prescribed by this procedure; e) report any condition that may impair their ability to safely use a respirator; f) ensure that no object or material interferes with the seal or operation of a respirator, including facial hair; -4- PR.689.HS g) check that the respirator is clean and in good operating condition prior to each use and at intervals that will ensure that it continues to operate effectively; h) perform a positive and negative seal check after each donning of a respirator (Appendix B); i) remove any potentially defective respirator from service and report it to the supervisor immediately; j) only use or wear a make/model/size respirator fo r which they have been fit-tested and authorized to use or wear; and k) advise their immediate supervisor of any accommodations that may be required based on creed or any other protected ground in the Ontario Human Rights Code, and cooperate in the provision of those accommodations . 3.4 Respirator Fit Testers will: a) conduct fit tests in accordance with CSA Standard Z94.4 Selection, Use and Care of Respirators. 4.0 PROCEDURE General 4.1 Only respirators approved by National Institute of Occupational Safety and Health (NIOSH) are permitted for use at the OCDSB. 4.2 Respirators will only be used where required by regulation, OCDSB safe work procedures, or where engineering and administrative controls are impractical or impossible to implement to reduce exposure to contaminants to an acceptable level. 4.3 Respirators must be used where prescribed based on the hazard(s) present regardless of the department or job class. Respirators may be required for any worker, including operations and maintenance personnel, teachers, or support staff. 4.4 Where an employee may come in contact with asbestos in the course of their duties, respirators shall be used in accordance with Procedure PR.619.HS Asbestos Management. 4.5 OCDSB workers will not: a) perform work requiring them to use Self-Contained Breathing Apparatus (SCBA); b) rely on a respirator for protection in an atmosphere that is immediately dangerous to life and health; or c) perform work in an area likely to develop an oxygen deficient atmosphere. Hazard Assessment (General) 4.6 In all circumstances where there is reason to believe that a worker will be exposed to airborne hazards in their work environment, a hazard assessment (Appendix C) must be conducted by, or in consultation with a Qualified Person, in accordance with the following guidelines: -5- PR.689.HS a) A single hazard assessment may be conducted for similar work being p erformed in similar conditions at different locations. b) A hazard assessment determines the nature of the hazard as it determines: i. the contaminants present; ii. the physical state of airborne contaminants; iii. whether the atmosphere is potentially oxygen deficient; iv. relevant exposure limits for the airborne contaminants; v. whether the atmosphere is immediately dangerous to life or health; vi. whether the respirator use is required by a regulation; vii. whether oil is present; viii. whether the contaminant can be absorbed through or is irritating to the skin or eyes; and ix. measures, or estimates the concentration of airborne contaminants. 4.7 Records of hazard assessments shall be maintained by the Occupational Health and Safety Division to document the initial and ongoing need for respirators. Hazard Assessment for Bioaerosol Protection 4.8 Hazard assessments for bioaerosols must be conducted in consultation with the OH&S Division and in accordance with CSA Standard Z94.4 Selection, Use and Care of Respirators. Respirator Selection 4.9 Where it has been determined that a respirator is required to be worn, the selection of the respirator must be done in consultation with a Qualified Person and in accordance with the steps outlined in “Flow Chart for Respirators Selection Process” at Appendix D. 4.10 Types of respirators used by OCDSB workers include: a) Supplied air (pressure-demand or continuous flow); or b) Powered and non-powered air-purifying respirators: i. Gas and vapour-removing; ii. Particulate-removing; and iii. Gas, vapour and particulate-removing. 4.11 Respirators for protecting against asbestos hazards shall be selected in accordance with Table 4 in Appendix E (Respirator Selection Tables) and Regulation 278/05: Designated Substance – Asbestos on Construction Projects and in Buildings and Repair Operations. 4.12 The selection of the appropriate respirators for the hazards identified and evaluated shall be documented and submitted to the Occupational Health and Safety Division for retention. Should the respiratory hazards change, the respirator selection process shall be repeated and documented. Selection of Escape Respirators 4.13 Designated escape respirators must only be used to exit a contaminated atmosphere. -6- PR.689.HS 4.14 Air-purifying respirators with particulate filters or chemical cartridges are approved for escape from atmospheres containing specific contaminants in concentrations that are not immediately dangerous to life or health and oxygen content of at least 19.5% by volume. This includes half and full facepiece respirators that are routinely used in many work environments. Mouthpiece-type cartridge respirators are approved for escape only. 4.15 Selection of escape respirators does not rely on Assigned Protection Factors (APF), like the respirators required for regular work activities. Instead, escape respirators are selected based on a consideration of the time needed to escape, and the likelihood of IDLH or oxygen deficiency conditions. 4.16 For escape respirators, it is critical to determine the potential for generation of a hazardous condition caused by an accident or equipment failure. Training 4.17 Supervisors and Respirator Users will receive instruction and training, which includes: a) their roles and responsibilities under this procedure; b) respiratory hazards encountered in the workplace, their potential health effects on the worker, and the means to control them; c) the rationale for the respirators selected and where to find more information about them; d) limitations of the respirator; e) procedures to follow in case of emergency; and f) care and practical use, including: i. donning and doffing (avoiding contamination) and, where required, redonning of respirators; ii. user seal checks; iii. care; iv. cleaning; v. inspection; vi. end-of-service recognition; vii. change-out of filter elements; viii. identification of problems; ix. use under failure or emergency modes; x. storage; xi. removal from Service; xii. basic Maintenance; and xiii. familiarity with, and adherence to manufacturer’s instructions. 4.18 Training materials and content must be developed in consultation with the OH&S Division. -7- PR.689.HS 4.19 Training will be provided by Qualified Persons with a practical understanding of this procedure and the roles, responsibilities and requirements within. 4.20 Supervisors will maintain training records, including the following: a) the name and E.I.N. of the respirator user; b) the date training was completed; c) the name of the trainer; and d) the results of fit testing, including the make, model, and size of respirator assigned to each worker. 4.21 The training record will be retained for the duration of employment of the respirator user. Respirator Fit Testing 4.22 A fit test shall be carried out: a) after completion of user screening; b) after or during training; c) prior to initial use of a respirator; d) when changes to a user’s physical condition (e.g., significant weight change or changes to facial or dental features) could affect the respirator’s fit; e) when there is a change in the respirator (e.g., make, model, size); f) when a respirator user experiences continued significant discomfort during use or difficulty in completing a successful user seal check; g) when there is a change in Personal Protective Equipment (PPE) use that could affect the respirator; and h) at least every 2 years. 4.23 Individuals will present themselves for fit testing free from interference of hair where the respirator seals to the skin of the face or neck. 4.24 Individuals will present themselves for fit testing in the same personal condition they would expect to be in when using the respirator. This includes hair styles (e.g., hair buns) and wearing or not wearing dentures, eyeglasses, or contact lenses. 4.25 Individuals will present themselves for fit testing in such a way that personal accessory such as head coverings, garments, facial jewelry, or other items shall not come between the skin and the sealing surface of the respirator. 4.26 Fit test records will be retained for respirator users for the duration of employment of the respirator user and will meet all the following requirements: a) the name of the person tested; b) the date of the tests; -8- PR.689.HS c) the specific make, model, and size of respirator; d) the type of fit test and test agent used; e) pass/fail criteria for the fit test; f) a list of additional PPE worn during the fit test; g) notes on restrictions related to facial hair, use of dentures and corrective eyewear, or any particular fitting difficulties such as unusual facial features or use of facial jewelry or cosmetics; h) the name of the person conducting the fit test; and i) documentation of the individual user’s competency and corresponding fit test results. Use of Respirators 4.27 Respirators requiring a tight fit in order to perform effectively must not be worn when an effective seal to the face or neck of the person cannot be achieved and maintained. 4.28 When using tight-fitting respirators, persons must wear or not wear dentures according to the conditions under which a successful fit test was obtained. 4.29 Temples on eyeglasses or any other materials such as hair, cloth, tissue, straps, or jewelry must not come between the skin and the sealing surface of the facepiece or interfere with the operation of the respirator. 4.30 Particulate filters (N, P, and R filters) must be replaced when breathing becomes difficult or as recommended by the manufacturer. In the case of Powered Air-Purifying Respirators (PAPRs), particulate filters must be replaced when the air flow does not meet the manufacturer’s requirements. 4.31 If used in atmospheres where oil is present, “R” rated particulate filters must be replaced after 8 hours of use. 4.32 Gas/vapour-removing cartridges or canisters equipped with an end-of-service-life indicator must be replaced when the indicator dictates. 4.33 Gas/vapour-removing cartridges or canisters not equipped with an end-of-service-life indicator must be replaced based on an established procedure or schedule that ensures that the cartridge is changed before the service life has ended. Consult the manufacturer’s instructions and/or the OH&S Division for assistance. Cleaning and Sanitizing 4.34 Respirators must be cleaned and sanitized (Appendix G). Respirators designed not to be cleaned must be discarded after use. Inspection 4.35 Users must inspect their respirators before and after each use, including: -9- PR.689.HS a) condition of component parts (e.g., facepiece, helmet, hood, suit, head harness, valves, connecting tubes, harness assemblies, filters, cartridges, canisters, cylinders); b) tightness of connections; c) end-of-service-life indicator (if available); d) shelf-life dates; and e) proper functioning of regulators, alarms, and other warning systems. 4.36 Any respirator that does not pass the inspection must be removed from service immediately. Storage 4.37 Respirators must be stored in a manner that will protect them against dust, ozone, sunlight, heat, extreme cold, excessive moisture, vermin, damaging chemicals, oils, greases, or any other potential hazard that can have a detrimental effect on the respirator. 4.38 Respirators must be stored in a manner that will prevent deformation of rubber or other elastomeric parts. 4.39 Respirators must be stored in sealed plastic bags and placed in a location where they are unlikely to be inadvertently disturbed or damaged, such as a locker or rigid storage bin. Health Surveillance 4.40 Prior to fit testing and respirator use, the supervisor will ensure that a Respirator User Screening Form (Appendix A) is completed that confirms that individuals are free from any physiological or psychological condition that could preclude them from using the selected respirator. All health information will be treated as medically confidential. 4.41 Where the supervisor or respirator user is concerned that a physiological or psychological condition exists that could preclude the use of a respirator, an opinion from a health care professional must be obtained regarding that person’s ability to use a respirator (Appendix A). a) This opinion must be obtained before the person is permitted to use a respirator or if a change in conditions warrants an additional opinion. b) The written opinion shall indicate whether the user: i. meets medical requirements; ii. meets medical requirements with limitations; or iii. does not meet medical requirements to use the selected respirator. Program Evaluation 4.42 The Occupational Health and Safety Division will ensure that the respiratory protection program is reviewed every two years including: a) a review of program elements against regulatory requirements; -10- PR.689.HS b) identification of management processes, including the clear definition of roles and responsibilities and adequate resources; c) a review of documented program procedures; d) examination of records to verify that documented procedures are being followed; e) confirmation that workplace practices comply with program requirements; f) documentation of performance problems and subsequent resolution or cor rective action plans; g) stakeholder input to verify worker acceptance (e.g., regarding comfort, ease of breathing, fatigue, vision, mobility, job interference, utility); h) proper selection, use, and maintenance of respirators; i) effective training of all stakeholders as evidenced by ongoing demonstration of competencies; j) proper inspection of respirators; and k) proper storage and maintenance of respirators. 5.0 APPENDICES Appendix A – OCDSB 935 Respirator User Screening Form Appendix B – User Seal Checks Appendix C – OCDSB 936 Respiratory Protection Hazard Assessment Form Appendix D – Flow Chart for Respirators Selection Process Appendix E – Respirators Selection Tables Appendix F – Guidelines for Values Calculation Appendix G – Cleaning and Sanitizing Respirators 6.0 REFERENCE DOCUMENTS Employment Standards Act, 2000 Ontario Occupational Health and Safety Act, 1990 Regulation 278/05: Designated Substance – Asbestos on Construction Projects and in Buildings and Repair Operations Infrastructure Health and Safety Association – Construction Health and Safety Manual (Respiratory Protection) Procedure PR.619.HS: Asbestos Management Procedure PR.667.HR Religious or Creed-based Accommodations for Employees Appendix B – User Seal Checks 1 Negative-pressure User Seal Check Using Tight-Fitting Elastomeric Facepiece A negative-pressure user seal check can be conducted on air-purifying respirators and atmosphere-supplying respirators equipped with tight-fitting facepiece. This check can be difficult or impossible to conduct on respirators incorporating air- purifying elements that do not allow the inhalation inlets to be temporarily sealed: a) The user seal check consists of closing off the inlet opening(s) of the respirator air-purifying elements so that upon inhalation, passage of air into the facepiece will not occur. In the case of atmosphere-supplying respirators, the user seal check consists of closing off the air supply hose. b) To avoid possible disruption of the facial seal, a non-permeable, flexible plastic wrap may be used to seal the air inlets instead of attempting to maintain a seal with the hands. c) The user shall inhale gently and hold a breath for at least 5 s. The facepiece will collapse slightly on the face and shall remain collapsed while the breath is held. d) During this period, the facepiece shall not be disturbed by the user attempting to maintain a seal on the inlet opening of the air-purifying elements. e) If the facepiece remains collapsed while a breath is being held, the user seal check is successful. f) If the facepiece does not remain collapsed while a breath is being held, the user shall verify that obstructs the sealing surface, adjust the facepiece and harness, and repeat the user seal check. g) If the facepiece still does not remain collapsed while a breath is being held, then the user shall remove the respirator, inspect the components for the cause of the leakage, correct any problems discovered, or obtain a replacement respirator and repeat the user seal check. h) Users shall not use a respirator for which a user seal check cannot be completed successfully. Positive-pressure User Seal Check Using Tight-Fitting Elastomeric Facepieces A positive-pressure user seal check can be conducted on respirators equipped with tight-fitting facepiece that contain both inhalation and exhalation valves: a) Don the respirator facepiece, closing off the exhalation valve or breathing tube, or both, and exhaling gently. Note: For some respirators, the positive-pressure user seal check requires that the exhalation valve cover be removed, then replaced following completion of the user seal check. b) During this period, the facepiece shall not be disturbed by the user attempting to maintain a seal on the exhalation valve. c) If a slight positive pressure can be maintained inside the facepiece without detection of any outward leakage of air, the user seal check is successful. d) If a slight positive pressure cannot be maintained inside the facepiece for 5 s, the user shall verify that nothing obstructs the sealing surface, adjust the facepiece and harness, and repeat the user seal check. e) If a slight positive pressure still cannot be maintained inside the facepiece, the user shall remove the respirator, inspect the components for the cause of the leakage, correct any problems discovered, or obtain a replacement respirator and repeat the user seal check. f) Users shall not use a respirator for which a user seal check cannot be completed successfully. *The respirator is intended only for escape, if it shows the following message; “Error! Reference source not found”. **Information on cartridges or canisters approved for use for classes of chemical or for specific gases or vapours can be found on the NIOSH Certified Equipment List: https://www.cdc.gov/niosh/npptl/topics/respirators/cel/default.html Solid or liquid aerosol No Yes Gas or vapour No A combination of gas/vapour and particulate Yes Appendix D: Flow Chart for Respirators Selection Process (Reference: Procedure PR.689.HS Selection, Use, and Care of Respirators) Above applicable exposure limit Below applicable exposure limit Calculate concentration of airborne contaminants No respirator required End Are conditions immediately dangerous to life or health? OCDSB workers don’t perform this type of work Yes End No Is the contaminant an eye irritant? No Yes Full-faced or hooded respirator required Half-mask or quarter mask required What is the physical state of the contaminant? Are oil particles present? Start Is the respirator intended for use during normal work activities?* Refer to escape respirators (where?!!) Use a filter of any series (i.e., N-, R-, or P- series) End Use R- or P- series if the filter is to be used for only one work shift. Use only P- series if the filter is to be used for more than one work shift. Use an air-purifying chemical cartridge/canister respirator** (Table 2) End End End Use a respirator from Table 3 End Appendix E – Respirator Selection Tables 1 Table 1 Particulate Respirators Assigned Protection Factor (APF) Type of Respirator 5 Quarter mask respirator 10 Any air-purifying elastomeric half-mask respirator equipped with appropriate type of particulate filter. Appropriate filtering facepiece respirator. Any air-purifying full facepiece respirator equipped with appropriate type of particulate filter. Any negative pressure (demand) supplied-air respirator equipped with a half-mask. 25 Any powered air-purifying respirator equipped with a hood or helmet and a high efficiency (HEPA) filter. Any continuous flow supplied-air respirator equipped with a hood or helmet. 50 Any air-purifying full facepiece respirator equipped with N-100, R-100, or P-100 filter(s). Any powered air-purifying respirator equipped with a tight-fitting facepiece (half or full facepiece) and a high- efficiency filter. Any negative pressure (demand) supplied-air respirator equipped with a full facepiece. Any continuous flow supplied-air respirator equipped with a tightfitting facepiece (half or full facepiece). Any negative pressure (demand) self -contained respirator equipped with a full facepiece. 1000 Any pressure-demand supplied-air respirator equipped with a halfmask. 2000 Any pressure-demand supplied-air respirator equipped with a full facepiece. 2 Table 2 Gas/Vapour Respirators Assigned Protection Factor (APF) Type of Respirator 10 Any air-purifying half mask respirator equipped with appropriate gas/vapour cartridges. Any negative pressure (demand) supplied-air respirator equipped with a half mask. 25 Any powered air-purifying respirator with a loose-fitting hood or helmet equipped with appropriate gas/vapour cartridges. Any continuous flow supplied-air respirator equipped with a hood or helmet. 50 Any air-purifying full facepiece respirator equipped with appropriate gas/vapour cartridges or gas mask (canister respirator). Any powered air-purifying respirator equipped with a tight-fitting facepiece (half or full facepiece) and appropriate gas/vapour cartridges or canisters. Any negative pressure (demand) supplied-air respirator equipped with a full facepiece. Any continuous flow supplied-air respirator equipped with a tight-fitting facepiece (half or full facepiece). 1000 Any pressure-demand supplied-air respirator equipped with a half-mask. 2000 Any pressure-demand supplied-air respirator equipped with a full facepiece. 3 Table 3 Gas/Vapour & Particulate Respirators Assigned Protection Factor (APF) Type of Respirator 10 Any air-purifying half-mask respirator equipped with appropriate gas/vapor cartridges in combination with appropriate type of particulate filter. Any full facepiece respirator with appropriate gas/vapor cartridges in combination with appropriate type of particulate filter. Any negative pressure (demand) supplied-air respirator equipped with a half-mask 25 Any powered air-purifying respirator with a loose-fitting hood or helmet that is equipped with an appropriate gas/vapor cartridge in combination with a high efficiency particulate filter. Any continuous flow supplied-air respirator equipped with a hood or helmet. 50 Any air-purifying full facepiece respirator equipped with appropriate gas/vapor cartridges in combination with an N-100, R-100 or P-100 filter or an appropriate canister incorporating an N-100, P-100 or R-100 filter. Any powered air-purifying respirator with a tight-fitting facepiece (half or full facepiece) equipped with appropriate gas/vapor cartridges in combination with a high-efficiency filter or an appropriate canister incorporating a high-efficiency filter. Any negative pressure (demand) supplied-air respirator equipped with a full facepiece. Any continuous flow supplied-air respirator equipped with a tight-fitting facepiece (half or full facepiece). 1000 Any pressure-demand supplied-air respirator equipped with a half-mask. 2000 Any pressure-demand supplied-air respirator equipped with a full facepiece. 4 Table 4 Respirator Selection for Work with Asbestos Work Category Required respirator Type 1 Operations Worker requests that the employer provide a respirator to be used by the worker, as described in paragraph 12 of section 14 of Regulation 278/05. Air purifying half-mask respirator with N-100, R-100 or P-100 particulate filter Type 2 Operations Work described in paragraph 1 of subsection 12 (3) of Regulation 278/05. One of the following: - Air purifying full-facepiece respirator with N-100, R-100 or P-100 particulate filter - Powered air purifying respirator equipped with a tight-fitting facepiece (half or full-facepiece) and a high efficiency filter or N-100, P-100 or R-100 particulate filter - Negative pressure (demand) supplied air respirator equipped with a full- facepiece - Continuous flow supplied air respirator equipped with a tight fitting facepiece (half or full-facepiece) Work described in paragraphs 2 to 7 and 9 to 11 of subsection 12 (3) of Regulation 278/05. Air purifying half-mask respirator with N-100, R-100 or P-100 particulate filter 5 Breaking, cutting, drilling, abrading, grinding, sanding or vibrating non- friable material containing asbestos by means of power tools, if the tool is attached to a dust collecting device equipped with a HEPA filter as described in paragraph 8 of subsection 12 (3) of Regulation 278/05. Material is not wetted One of the following: - Air purifying full-facepiece respirator with N- 100, R-100 or P-100 particulate filter - Powered air purifying respirator equipped with a tight-fitting facepiece (half or full- facepiece) and a high efficiency filter or N- 100, P-100 or R-100 particulate filter - Negative pressure (demand) supplied air respirator equipped with a full-facepiece - Continuous flow supplied air respirator equipped with a tight fitting facepiece (half or full-facepiece) Material is wetted to control spread of fibre Air purifying half-mask respirator with N-100, R-100 or P-100 particulate filter Type 3 Operations Breaking, cutting, drilling, abrading, grinding, sanding or vibrating non-friable material containing asbestos by means of power tools, if the tool is not attached to a dust collecting device equipped with a HEPA filter as described in paragraph 5 of subsection 12 (4) of Regulation 278/05. Material is not wetted Pressure demand supplied air respirator equipped with a half mask Material is wetted to control spread of fibre One of the following: - Air purifying full-facepiece respirator with N-100, R-100 or P-100 particulate filter - Powered air purifying respirator equipped with a tight- fitting facepiece (half or full-facepiece) and a high efficiency filter or N-100, P-100 or R-100 particulate filter - Negative pressure (demand) supplied air respirator equipped with a full-facepiece - Continuous flow supplied air respirator equipped with a tight fitting facepiece (half or full-facepiece) Work with friable material containing Material is not wetted Pressure demand supplied air respirator equipped with a full facepiece 6 asbestos, as described in paragraphs 1 to 4 and 6 of subsection 12 (4) of Regulation 278/05. Work with friable material, as described in paragraphs 1 to 4 and 6 of subsection 12 (4) of Regulation 278/05, that contains a type of asbestos other than chrysotile. Work with friable material, as described in paragraphs 1 to 4 and 6 of subsection 12 (4) of Regulation 278/05, that contains only chrysotile asbestos Material was applied or installed by spraying, and is wetted to control spread of fibre Pressure demand supplied air respirator equipped with a half mask One of the following: - Air purifying full-facepiece respirator with N-100, R-100 or P-100 particulate filter - Powered air purifying respirator equipped with a tight- fitting facepiece (half or full-facepiece) and a high efficiency filter or N-100, P-100 or R-100 particulate filter - Negative pressure (demand) supplied air respirator equipped with a full-facepiece - Continuous flow supplied air respirator equipped with a tight fitting facepiece (half or full-facepiece) Work with friable material containing asbestos, as described in paragraphs 1 to 4 and 6 of subsection 12 (4) of Regulation 278/05. Material was not applied or installed by spraying, and is wetted to control spread of fibre One of the following: - Air purifying full-facepiece respirator with N-100, R-100 or P-100 particulate filter - Powered air purifying respirator equipped with a tight- fitting facepiece (half or full-facepiece) and a high efficiency filter or N-100, P-100 or R-100 particulate filter - Negative pressure (demand) supplied air respirator equipped with a full-facepiece - Continuous flow supplied air respirator equipped with a tight fitting facepiece (half or full-facepiece) 7 8 9 10 11 12 13 Appendix F – Guidelines for Values Calculation 1. The Assigned Protection Factor is determined by the type of respirator as indicated in Appendix E. 2. The Maximum Use Concentration (MUC) is determined by the lesser of: a) APF multiplied by the exposure limit; b) The respirator manufacturer’s MUC for a hazardous substance (if any); or c) The immediately dangerous to life or health concentration of the contaminant. The MUC usually can be determined mathematically by multiplying the assigned protection factor specified for a respirator by the exposure limi t, short-term exposure limit, ceiling limit, peak limit, or any other exposure limit used for the hazardous substance. 3. The Short Term Exposure Limit (STEL) is determined by the Ministry of Labour. 4. The Time-Weighted Average (TWA) is determined by the Ministry of Labour. Appendix G: Cleaning and Sanitizing Respirators Respirators shall be cleaned as follows: a) Remove filters, cartridges, or canisters. Disassemble facepieces by removing speaking diaphragms, pressure-demand valve assemblies, hoses, and any other components as recommended by the manufacturer. Discard or repair any defective parts. b) Wash components in warm [43° C (110°F) maximum] water with a mild detergent or with a cleaner recommended by the manufacturer. A stiff bristle (not wire) brush may be used to facilitate the removal of dirt. c) Rinse components thoroughly in clean, warm [43° C (110°F) maximum], preferably running water. Drain. d) When the cleaner used does not contain a disinfecting agent, respirator components should be immersed for 2 min in one of the following: i. hypochlorite solution (50 ppm of chlorine), made by adding approximately 1 mL of laundry bleach (5 to 6% chlorine) to 1 L of water at 43° C (110°F); ii. aqueous solution of iodine (50 ppm of iodine), made by adding approximately 0.8 mL of tincture of iodine (6 to 8 g ammonium or potassium iodide/100 cc of 45% alcohol) to 1 L of water at 43° C (110°F); or iii. other commercially available cleansers of equivalent disinfectant quality when used as directed, if their use is recommended or approved by the respirator manufacturer. e) Rinse components thoroughly in clean, warm [43° C (110°F) maximum], preferably running water. Drain. The importance of thorough rinsing cannot be overemphasized. Detergents or disinfectants that dry on facepieces can result in adverse skin reactions (e.g., dermatitis). In addition, some disinfectants can cause deterioration of rubber or corrosion of metal parts if not completely removed. f) Components should be hand-dried with a clean, lint-free cloth or air- dried. g) Reassemble the facepiece, replacing filters, cartridges, and canisters where necessary. h) Ensure that all components work properly in accordance with the manufacturer’s instructions.