3. Evaluation of control effect of occupational hazards in construction projects
3. 1 Before the completion and acceptance of the construction project, the construction unit entrusts an evaluation institution to evaluate the control effect of occupational hazards in the construction project.
3.2 Preparation of evaluation scheme
The evaluation unit shall, according to the pre-evaluation report of the feasibility demonstration of the construction project and the contents of the trial operation of the project construction, prepare an evaluation plan for the control effect of occupational disease hazards before the completion acceptance.
The evaluation plan mainly includes the following contents:
A. the purpose, basis and scope of the assessment;
B. General situation of project construction, construction and trial operation of various occupational disease prevention facilities;
C. Contents, methods and quality assurance measures of on-site investigation and monitoring;
D. organize the implementation plan, schedule and funding arrangement.
3.3 Field investigation
After accepting the entrustment of evaluation, the evaluation unit conducts occupational health investigation. Occupational health survey mainly includes the following aspects:
3.3. 1 Hygienic investigation of production process: Understand the whole process of production process and determine the occupational hazard factors in production.
A. Chemical factors (toxic substances, productive dust): names of raw materials, semi-finished products, intermediate products, products and wastes, quantities produced and used, physical and chemical characteristics, contact methods and workers' contact time;
B. Physical factors: noise, high temperature, low temperature, vibration, ionizing and non-ionizing radiation, etc.
C. biological factors: pathogenic pathogens existing in the production process.
3.3.2 Hygienic survey of working environment: the implementation of hygienic protection measures in general layout, production technology and equipment layout, building hygiene requirements, occupational disease protection equipment, emergency rescue facilities, personal occupational disease protection articles and sanitary facilities.
3.3.3 Investigate whether the construction project is implemented in strict accordance with the current Hygienic Standard for Design of Industrial Enterprises, and whether the occupational health review opinions put forward during the design review at various stages are implemented.
3.3.4 Investigation on Occupational Health Management
A. establish occupational health management institutions;
B. improve occupational health rules and regulations and operating procedures;
C. Occupational health education, determination of occupational hazard factors and health monitoring;
D. archiving of occupational health data.
3.4 On-site monitoring: determine the concentration (intensity) of occupational hazard factors in the workplace.
3.4. 1 inspection method: according to relevant national occupational health standards.
3.4.2 Test conditions: According to the design full-load production conditions.
3.4.3 Detection frequency: According to the type, nature, change and degree of harm of production process and occupational hazard factors, samples are generally taken continuously for three days, once a day in the morning and once a day in the afternoon.
At the same point in different time, each measurement shall not be less than three samples, and the average of the test results shall be taken (except the test results of physical factors such as radiation and noise).
Special circumstances shall be implemented according to the corresponding national occupational health standards.
3.4.4 See Annex 4 for the principle of setting test points for chemical factors and physical factors.
3.5 Occupational health examination
Carry out occupational health examination for workers who may be exposed to occupational hazards, determine occupational health examination items according to occupational hazard factors, and evaluate the control effect of occupational hazards according to the results of occupational health examination.
3.6 Evaluation results
A. Evaluate whether the site selection and general layout meet the requirements stipulated by the state;
B. engineering protection facilities and their effects;
C, calculating the average concentration (or intensity) of each test point of occupational disease hazard factors, wherein the geometric average is calculated for dust concentration test data, the arithmetic average or geometric average is calculated for poison concentration (if the test data is normal distribution, the arithmetic average is calculated for skewed distribution), and the average is not calculated for noise test data; The concentration (or intensity) of occupational hazard factors at each inspection point is qualified if it does not exceed the standard, and it is unqualified if it exceeds the standard;
D. According to the above calculation results, evaluate the control effect of protective facilities of occupational health projects; Evaluate the effect of occupational health protection and remedial measures for some posts with excessive occupational hazards due to the limitation of production technology or equipment technology level;
E. Evaluate the configuration of personal hygiene protection articles, emergency rescue facilities and warning signs;
F evaluate the implementation of occupational health management institutions, personnel and rules and regulations of construction projects.
3.7 Control Effect Evaluation Report
The evaluation report of construction project control effect shall include the following main contents:
A. evaluation purpose, basis, scope and content;
B. General situation and trial operation of construction projects;
C types, distribution, concentration or intensity of occupational hazards existing in the production process of construction projects, and the degree of occupational hazards;
D implementation of occupational disease protection measures, including general layout, production technology and equipment layout, building hygiene requirements, sanitary engineering protection facilities, emergency and rescue measures, personal protective facilities, auxiliary sanitary rooms and occupational health management measures;
E. effect evaluation of protective facilities against occupational hazards;
F. evaluation conclusions and recommendations.