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[Fugitives Regulations] EPA analysis of suspended particle concentration indicates that arson is more effective than tear gas

2019-12-04T04:38:41.846Z


The anti-revision case has been in the air for nearly half a year. Police earlier pointed out that about 10,000 tear gas bombs were used in more than 900 demonstrations, raising public concerns about tear gas affecting air quality and physical health. The Secretary for Food and Health, Chen Zhaoshi, responded to written questions from members of the Legislative Council saying that the spread of tear gas residues is limited and will not be suspended in the air for a long time. She also pointed out that the EPA's analysis of particle data from air monitoring stations in areas where tear gas has been used since June has not shown any abnormalities; instead, arson activities have affected air quality.


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Written by: Zhang Jiamin

2019-12-04 12:30

Last updated: 2019-12-04 12:30

The anti-revision case has been in the air for nearly half a year. Police earlier pointed out that about 10,000 tear gas bombs were used in more than 900 demonstrations, raising public concerns about tear gas affecting air quality and physical health.

The Secretary for Food and Health, Chen Zhaoshi, responded to written questions from members of the Legislative Council saying that the spread of tear gas residues is limited and will not be suspended in the air for a long time. She also pointed out that the EPA's analysis of particle data from air monitoring stations in areas where tear gas has been used since June has not shown any abnormalities; instead, arson activities have affected air quality.

The Secretary for Food and Health, Chen Zhaoshi, said that after large-scale public events, the FEHD would provide street cleaning services as soon as the road conditions allowed. (Profile picture)

The Secretary for Food and Health, Chen Zhaoshi, responded to a written question by Legislative Councillor Hu Zhiwei today (4th), stating that tear gas is mainly a granular substance, which will settle down after application, and its residue will generally be attached to the ground or objects after settling Surface, will not be suspended in the air for a long time, and the diffusion range is limited.

Tear smoke has not significantly increased the concentration of suspended particles

She also mentioned that the Environmental Protection Agency had analyzed particle data recorded at air monitoring stations near areas where tear gas has been used since June. After comparing different data, it was found that there was no abnormality in air particle levels, that is, tear gas did not significantly increase the concentration of suspended particles in the entire area. On the other hand, on the days when arson occurred, the nearby monitoring station recorded that the suspended particle concentration rose to twice the normal level for several hours, indicating that the arson has affected the air quality in the nearby area.

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Guidelines stating not to use high-pressure water guns

She also said that the FEHD would provide street cleansing services as soon as possible under the conditions of the road surface and increase the frequency of cleaning the affected streets. In addition, the Department and the Housing Department have issued work guidelines to employees and service contractors, stating that high pressure water jets should not be used during cleaning to avoid re-raising residual particles. In addition, when FEHD employees use street washing vehicles to wash the streets, they must also turn off the auxiliary engines of the street washing vehicles or adjust the nozzle water pressure to a minimum to avoid raising residual particles. For non-public areas, cleaning services should be provided by the site owner or manager. The Department of Health has issued health information on tear gas and uploaded it to the CHP website.

As for the Science Museum and History Museum affected by the PolyU conflict earlier, the LCSD has cleaned the site during the closing period, including cleaning or replacing the air-conditioning system screens. The fresh air dampers of the air-conditioners were closed beforehand.

[Urban conflict] Government refuses to disclose tear gas component

[Police Press Conference] Tsim Sha Tsui fired tear gas

[12.1. Atlas] Do not Don't forget the parade of the beginning of the heart, the policemen of the empty waterfront of the tip of Tsui Tsui fired tear gas bombs

[Fugitives Regulations] 400 people participate in the procession to promote the parking of tear gas participants.

Police have used about 10,000 tear gas bombs since June 11.12 Large and multi-regional conflicts account for up to 20% in a single day

[Fugitives Regulations] Citizens Release Tear Grenades in Police in Distressed Areas

Fugitive Ordinance Dioxin Tear Gas

Source: hk1

All news articles on 2019-12-04

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