On January 16, the Ministry of Housing and Urban-Rural Development of the People's The 2020 "Civil Construction Engineering Indoor Environmental Pollution Control Standards", which will come into effect today (August 1, 2020), and the original "Civil Construction Engineering Indoor Environmental Pollution Control Specifications" GB 50325-2010 will be abolished at the same time.

The new standard adds toluene and xylene to the five organic pollutants (radon, formaldehyde, benzene, ammonia, TVOC), and tightens indoor air The concentration limit of pollutants in the air, to a greater extent, protects people's health!

 

 

Compared with the old standard, the new standard puts forward stricter requirements for pollutant control↓↓↓

 

(1) Increased the types of pollutants in indoor air. In GB 50325-2010 (2013 edition), there are 5 kinds of indoor air pollutants (radon, formaldehyde, benzene, ammonia, TVOC). This standard adds toluene on the basis of GB 50325-2010 (2013 edition). and xylene, seven types in total.

 

(2) Strictly limit the concentration of pollutants in indoor air. Most of the pollutant concentration limits in this standard are stricter than GB 50325-2010 (2013 edition), and some pollutant concentration limits are even stricter than the "Indoor Air Quality Standard" GB/T 18883-2002 .

Since this standard and the GB/T 18883-2002 standard have different sampling requirements for indoor air pollutants (such as the closing time of doors and windows before sampling), it cannot be directly carried out Compare.

(3) Stricter pollution control requirements are put forward for the decoration of kindergartens, school classrooms, student dormitories, etc.

Article 6.0.14 of this standard stipulates that during the acceptance of interior decoration and decoration of kindergartens, school classrooms, student dormitories, and elderly care housing facilities, the indoor air Radon, formaldehyde, ammonia, benzene, toluene, xylene, TVOC random inspection amount shall not be less than 50% of the total number of rooms, and shall not be less than 20 rooms. When the total number of rooms is not more than 20,all of them should be inspected.

(4) The number of detection points for indoor pollutant concentration has been adjusted. In this standard, the number of detection points for rooms with an area greater than 1,000 square meters has been adjusted.

(5) The detection method of radon concentration in indoor air is clarified. GB 50325-2010 (2013 Edition) only has requirements for the uncertainty of measurement results and the lower limit of detection of radon concentration detection methods, and does not specify which detection methods can be selected.

This standard clarifies that the detection of radon concentration in the indoor air of civil buildings should adopt the pump suction electrostatic collection energy spectrum analysis method, pump suction scintillation chamber method, pump suction pulse ionization chamber method, activated carbon box-low background multi-channel & gamma; spectrometer method.

(6) Added TC composite adsorption tube for benzene series and volatile organic compounds (TVOC) (2,6-p-phenylbiphenyl Ether porous polymer-graphitized carbon black-X composite adsorption tube) sampling and detection method, which further improves and refines the sampling and measurement requirements for indoor air pollutants.

The increase in the amount of random inspection, the increase in pollutants and the reduction of limit values, and the optimization of detection methods all reflect the government's commitment to improvement Determination of the indoor environment of civil construction projects!

The new standard is better than the old standard in one sentence: higher labeling and stricter requirements. To meet the new standard, you must choose products that meet the high standard, Simon High Standard Inorganic Coatings is a product customized for the new standard.

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