Occupational health "three simultaneous" means that the occupational disease protection facilities of a construction project must be designed, constructed and put into use at the same time as the main project.

The "three simultaneous" system is one of the earliest environmental management systems introduced in China. It is an original creation of China, based on China's socialist system and construction experience, and is an effective environmental management system with Chinese characteristics.

According to Article 41 of China's Environmental Protection Law, which came into effect on January 1, 2015, "Facilities for preventing and controlling pollution in a construction project shall be designed, constructed and put into operation at the same time as the main project. The facilities for preventing and controlling pollution shall comply with the requirements of the approved environmental impact assessment documents and shall not be removed or left unused without authorization."

Expanded:

The role of the "three simultaneous" system

The "three simultaneous" system is aimed at eliminating the pollution that may be generated by various types of construction projects at the source, eliminating the root causes of environmental problems at the root, and alleviating the costs to be paid for the management of environmental problems afterwards. The "three simultaneous" system aims to eliminate pollution at source, eliminate the root causes of environmental problems, reduce the cost of ex post facto control, and control environmental impacts within the limits that the ecological environment can bear.

The role of the main "prevention" as the basis for the requirement to focus on the treatment of old sources of pollution, strict control of new pollution, reduce the generation and emission of pollutants, environmental pollution and damage has been caused by the active measures to be taken to deal with.

Based on the specific characteristics of environmental problems and the laws of nature, to change the past "pure governance, single governance" model, the implementation of comprehensive remediation to strengthen the environmental management of construction projects, to achieve comprehensive planning, rational layout, environmental protection into the national economy and social development plans for a comprehensive balance.