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Basic dataStandard ID: GBZ 2.1-2019 (GBZ2.1-2019)Description (Translated English): Occupational exposure limits for hazardous agents in the workplace -- Part 1: Chemical hazardous agents Sector / Industry: National Standard Classification of Chinese Standard: C52 Classification of International Standard: 13.100 Word Count Estimation: 54,596 Date of Issue: 2019 Date of Implementation: 2020-04-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GBZ2.1-2019: Occupational exposure limits for hazardous agents in the workplace -- Part 1: Chemical hazardous agents---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Occupational exposure limits for hazardous agents in the workplace - Part 1.Chemical hazardous agents ICS 13.100 C 52 Replace GBZ 2.1-2007 Occupational exposure limits for hazardous factors in the workplace Part 1.Chemical harmful factors 2019-08-27 released 2020-04-01 implementation ForewordThe occupational exposure limits in Tables 1 to 3 of this standard are mandatory, and the rest are recommended. This standard is formulated in accordance with the "Law of the People's Republic of China on Occupational Disease Prevention and Control" GBZ 2 "Occupational Exposure Limits for Hazardous Factors in the Workplace" is divided into two parts. --Part 1.Chemical harmful factors; --Part 2.Physical factors. This part is part 1 of GBZ 2. This part was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GBZ 2.1-2007 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1.Chemical Hazardous Factors". With GBZ 2.1 -Compared to.2007, the main technical changes except for editorial changes are as follows. --Add 6 normative reference documents. GBZ /T 300, GBZ /T 192, GBZ /T 295, GBZ /T 224, GBZ /T 225 and GBZ /T 229.2; --Add 9 concepts or definitions related to occupational exposure; delete 5 terms in normative reference documents; introduce peak exposure concentration Concept and replace over-limit multiples; - To summarize and increase the occupational exposure limits for 28 chemical hazards developed and revised in recent years. - Adjust the Chinese or English names of 8 chemical substances and the CAS numbers of 8 substances; --Increase the sensitization label of 16 substances, the skin label of 4 substances, the carcinogenic label of 14 substances, and adjust the label of 7 substances Cancer identification; - Incorporate the exposure limit of nitric oxide into the exposure limit of nitrogen dioxide; -Clearly list the adverse health effects on which exposure limits are based; --In Chapter 4 "Health Requirements", occupational exposure biological limits (biological monitoring indicators and exposure limits) have been added. The health industry standard occupational exposure biological limits and testing method standards were confirmed, and 28 biological monitoring indicators were summarized and listed And exposure limits. Among them, 13 kinds of occupational exposure biological limit values, biological material testing and biological monitoring approved in recent years have been added. Test quality requirements; --Further improve the relevant requirements of the monitoring and detection methods; for the PC-TWA for total dust and respirable dust Confirmed the priority of TWA for the determination of respirable dust; - Added the principles and requirements for occupational exposure control of chemical hazardous factors in the workplace; --- Added Appendix B, giving information on the main drafters and main drafters of the new limit; --Further refinement and improvement have been made to Appendix A for the correct use instructions. Increased the control principles of occupational exposure to harmful factors and Key points, action levels, occupational exposure classification and its control, occupational disease hazard operation classification management principles, etc., the original standard Part of the content in Appendix A "Instructions for Correct Use" has been revised into the standard text. Drafting organizations of this section. Occupational Health and Poisoning Control Institute of China Center for Disease Control and Prevention, School of Public Health of Fudan University, Military Medical School of Subjects, Tongji School of Public Health, Huazhong University of Science and Technology, School of Public Health of Peking University, Guangdong Occupational Disease Prevention and Treatment Institute, etc. The main drafters of this section. Li Tao, Zhang Min, Yan Huifang, Zhu Xiaojun, Chen Qingsong, Li Wenjie, Xu Bohong, Wu Weiai, Zheng Yuxin, Liu Hongtao, Zhou Zhijun, Wang Sheng, Gu Jingyu, Qiu Chuangyi, Yang Lei, Liu Xiaoyan, Du Xieyi, Qiu Bing, Ding Chunguang, Wang Enye, Nie Wu, Zhu Zhiliang. The previous version of the standard replaced by this part. --GBZ 2-2002; --GBZ 2.1-2007. Occupational exposure limits for hazardous factors in the workplace Part 1.Chemical harmful factors1 ScopeThis section specifies the hygiene requirements, testing, evaluation and control principles for occupational exposure to chemical hazardous factors in the workplace. This part is applicable to the management, control and occupational health supervision of industrial enterprise sanitation design and occupational exposure to chemical harmful factors in the workplace Check etc.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GBZ 1 Hygienic Standard for Design of Industrial Enterprises GBZ 159 Sampling specification for monitoring hazardous substances in the air in workplaces GBZ /T 160 (all parts) Determination of toxic substances in workplace air GBZ /T 192 (all parts) Determination of dust in the air in the workplace GBZ /T 224 Occupational Health Terminology GBZ /T 225 Guidelines for the prevention and treatment of occupational diseases in employers GBZ /T 229.2 Classification of occupational hazards in the workplace Part 2.Chemicals GBZ /T 295 General rules of biological monitoring methods for occupational population GBZ /T 300 (all parts) Determination of toxic substances in workplace air 3 Terms, definitions and abbreviations The following terms and definitions defined in GBZ /T 224 apply to this document. 3.1 Chemical hazards The chemical harmful factors referred to in this section include chemical substances, dust and biological factors existing or produced in the workplace. 3.2 Occupational exposure Workers in occupational activities through the respiratory tract, skin and mucous membranes and other occupational harmful factors contact process. 3.3 Adverse health effects The harmful health effects or toxic effects of the body due to exposure to occupational harmful factors. Only reach a certain level of contact, That is, excessive exposure can cause health damage. 3.4 Critical adverse health effects It is used to determine the allowable exposure concentration of a certain occupational harmful factor, that is, the adverse health effect based on the occupational exposure limit. 3.5 Occupational exposure limits; OELs Workers have long-term repeated exposure to one or more occupational harmful factors in the process of occupational activities, which will not cause the majority of contacts to be unhealthy Allowable exposure level for health effects. Occupational exposure limits for chemical hazardous factors are divided into time-weighted average allowable concentration and short-term exposure allowable There are three types of concentration and maximum allowable concentration. Note. Rewrite GBZ /T 224-2010, definition 5.1. 3.5.1 Permissible concentration-time weighted average; PC-TWA The average allowable exposure concentration for 8 h working day and 40 h working week specified by time as weight. 3.5.2 Permissible concentration-short term exposure limit; PC-STEL Under the premise that the actual measured average exposure concentration of 8 h working day and 40 h working week complies with PC-TWA, workers are allowed to take a short time (15 min) The weighted average concentration of exposure. Note. Rewrite GBZ /T 224-2010, definition 5.3. 3.5.3 Maximum allowable concentration; MAC The concentration of chemical harmful factors that should not be exceeded in a working day, at any time and at the workplace. Note. Rewrite GBZ /T 224-2010, definition 5.2. 3.6 Peak exposures; PE The maximum or peak concentration of a specific substance in the air determined in the shortest analyzable time period (no more than 15 minutes). For contact With PC-TWA but not yet established PC-STEL chemical hazards, peak exposure concentration should be used to control short-term exposure. In compliance Under the premise of PC-TWA, any short time (15 min) exceeding the maximum connection level of PC-TWA is allowed within a working day. Touch concentration. 3.7 Exposure level Workers detected by standard testing methods are actually exposed to occupational hazards in the workplace during a specific period of time during professional activities The concentration or strength of the element. Note. Rewrite GBZ /T 224-2010, definition 2.22. 3.8 Ratio of occupational exposure level to OELs The ratio of the actual exposure level of workers exposed to a certain occupational harmful factor to the corresponding occupational exposure limit of the factor. When workers are exposed to more than two chemical hazardous factors, the actual measured value of each chemical hazardous factor and its corresponding occupational exposure limit The sum of the ratios of is called the ratio of mixed exposure. 3.9 Action level The level of actual exposure of workers to chemical harmful factors has reached the level that employers need to adopt occupational exposure monitoring, occupational health The level of control measures or actions such as occupational hygiene training and notification of occupational hazards, also known as the administration level or management Concentration (administration concentration). The action level of chemical harmful factors varies according to the workplace environment and the harmful factors exposed to it, generally this factor Half the allowable concentration. Note. Rewrite GBZ /T 224-2010, definition 2.23. 3.10 Biological monitoring Systematically measure the content (concentration) of chemical substances or their metabolites in workers’ blood, urine, and other biological materials, or The systematic monitoring of the level of harmless biological effects is to evaluate the degree of exposure of workers to chemical harmful factors and their possible health effects. Note. Rewrite GBZ /T 224-2010, definition 6.1.2. 3.11 Biological exposure limits; BELs The maximum allowable value recommended for the chemical substances or their metabolites in the biological materials of workers, or the biological effects caused by them, is also A guide value for evaluating the results of biological monitoring. Work for 5 days a week and exposure for 8 hours a day. When the biological monitoring value is within its recommended range, it is extremely Most workers will not be adversely affected by health. Also known as Biological Exposure Indices (BEIs) or Biological limit values (BLVs). Note. Rewrite GBZ /T 224-2010, definition 5.9.4 Hygiene requirements4.1 Occupational exposure limits for chemical harmful factors in the air in the workplace The occupational exposure limits of chemical hazardous factors in the air in the workplace are shown in Table 1.5 Monitoring and testing principles and requirements5.1 The sampling of hazardous substances in the air in the workplace shall be carried out in accordance with GBZ 159. 5.2 The detection of chemical harmful factors and dust in the air of the workplace shall be carried out in accordance with GBZ /T 160, GBZ /T 300 and GBZ /T 192.If there is no phase The corresponding testing methods can refer to domestic and foreign recognized testing methods, but they should be included in the quality control procedures. 5.3 For dusts with separate allowable concentrations of total dust and respirable dust, the exposure concentration of respirable dust should be determined first. 5.4 The determination of harmful substances and their metabolites or effect indicators in biological materials matched with BELs shall be carried out in accordance with GBZ /T 295.6 Principles and requirements for occupational exposure control of chemical hazardous factors in the workplace6.1 Priority principles for the control of chemical harmful factors 6.1.1 The control of exposure to chemical hazardous factors in the workplace should be based on the actual situation of occupational disease hazards in the workplace and in accordance with the requirements of GBZ 1. Require comprehensive control measures. 6.1.2 Eliminate the substitution principle. Prioritize the use of new technologies, new processes, new materials, and new equipment that are beneficial to protecting the health of workers, and use harmless Replace harmful, low-toxicity hazards and high-toxicity processes, technologies and materials, and control workers’ exposure to chemical hazards from the source. 6.1.3 Engineering control principles. If the production process, technology and raw and auxiliary materials fail to meet the hygienic requirements, they should be based on the production process and chemical The characteristics of harmful factors, corresponding engineering control measures such as dust prevention, anti-virus, ventilation, etc., will be adopted to make the workplace chemical The concentration of harmful factors meets hygiene requirements. 6.1.4 Principles of management control. By formulating and implementing management control measures, workers’ exposure to chemical Low-hazard health effects. 6.1.5 Principles of personal protection. When the adopted control measures still cannot achieve effective control of contact, other control measures should be used in combination. And appropriate personal protective equipment; personal protective equipment is usually used when other control measures are not ideal to achieve the control objectives. 6.1.6 When evaluating the rationality and feasibility of prevention and control measures, the types of occupational hazards and the The cost to be paid. 6.2 Key points of occupational exposure control 6.2.1 When formulating occupational exposure control measures, full consideration should be given to all possible routes of exposure, including inhalation through the respiratory tract and skin inhalation. Collection and oral intake; 6.2.2 The control measures taken should be targeted and can effectively prevent the health hazards that may be caused by the harmful factors; 6.2.3 The most effective and reliable control measures should be selected to avoid the leakage of harmful factors or minimize their spread as much as possible; 6.2.4 The relevant elements of all control measures shall be regularly checked and evaluated, and their continuous effectiveness shall be maintained; 6.2.5 All relevant workers shall be informed of the chemical hazards that may occur during work and the corresponding control measures Conduct occupational disease prevention and control knowledge training; 6.2.6 It should be ensured that the control measures taken will not threaten the health and lives of workers. 6.3 Requirements for occupational exposure control of chemical hazardous factors in the workplace 6.3.1 When workers are exposed to chemical hazards that have MACs, the maximum maximum value at any time and at any workplace within a working day The maximum exposure concentration (CME) shall not exceed its corresponding MAC value. 6.3.2 When workers are exposed to the chemical harmful factors of PC-TWA and PC-STEL, the actual measured time-weighted average of the day The exposure concentration of time weighted average (CTWA) shall not exceed the PC-TWA corresponding to this factor At the same time, the exposure concentration of short term (CSTE) during a working day shall not exceed The corresponding PC-STEL value. 6.3.3 When workers are exposed to chemical hazards that only have PC-TWA but have not yet established PC-STEL, the actual CTWA measured on the day The corresponding PC-TWA value shall not be exceeded; at the same time, the contact level of workers that instantaneously exceeds the PC-TWA value by 3 times shall not exceed 15 min, no more than 4 times during a working day, consecutive intervals no less than 1 h, and under no circumstances can exceed the PC-TWA value 5 times. 6.3.4 For the control of chemical harmful factors that have not yet established OELs, in principle, the vast majority of workers should be It will not harm its health. Employers can use existing information and refer to OELs developed by domestic and foreign authoritative organizations to formulate their own Use sanitary standards and take effective measures to control workers’ exposure. 6.4 Control measures When the concentration of workers exposed to chemical harmful factors exceeds the action level, the employer shall refer to the requirements of GBZ /T 225 to take measures including dust prevention, Engineering control measures such as anti-virus, monitoring of harmful factors in the workplace, occupational health monitoring, notification of occupational hazards, occupational health training and other technologies And management control measures. The level of action is not to be used as the basis for determining job allowances for workers exposed to occupational hazards. 6.5 Occupational exposure level of chemical hazardous factors and classification control 6.5.1 According to the workers’ actual exposure to chemical harmful factors, the workers’ exposure level can be divided into 5 levels, and the corresponding recommended levels Control measures are shown in Table 5. 6.5.2 Refer to GBZ /T 229.2 for the classified management of occupational hazards of chemicals in the workplace.7 Instructions for using this section correctlySee Appendix A for instructions on the correct use of this section.Appendix A(Normative appendix) Instructions for using this section correctly A.1 The purpose of establishing occupational exposure limits for chemical hazardous factors in the workplace A.1.1 Occupational exposure limit is the exposure limit value of occupational harmful factors. Establishment of occupational exposure limits for chemical hazardous factors in the workplace The purpose is to guide employers to take preventive and control measures to prevent workers from excessive exposure to chemical harmful factors during professional activities. Adverse health effects. A.1.2 Occupational exposure limits for chemical hazards in the workplace are the employer’s assessment of workplace hygiene, and workers’ exposure to chemical hazards. The degree of factors and the important technical basis for the control effect of protective measures are the key to the implementation of occupational health risk assessment, risk management and risk communication. It can also be used as a reference value for setting the alarm value of occupational hazards in the workplace. A.1.3 The occupational exposure limit of chemical hazardous factors in the workplace is also the responsibility of the occupational health An important technical basis for health technical service organizations to carry out occupational health risk assessment and occupational disease hazard assessment. A.2 Correct application of different types of occupational exposure limits A.2.1 PC-TWA, PC-STEL or MAC should be used correctly when evaluating the occupational health status of the workplace or the personal exposure level of workers. And carry out air sampling and monitoring in accordance with relevant standards. A.2.2 PC-TWA is the main indicator for evaluating the exposure level of workers and......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GBZ2.1-2019_English be delivered?Answer: Upon your order, we will start to translate GBZ2.1-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. 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