Further to the first batch of test results on water, soil and surface wipe samples as well as the test results for CS powder of air samples released on 28 December, 2019, The Hong Kong Polytechnic University (PolyU) today announced all the remaining test results for the air samples collected at various locations on campus (see Appendix I).
The tests cover analyses of several major contaminants including dioxins, total Polychlorinated Biphenyls (PCBs), Polycyclic Aromatic Hydrocarbons (PAHs) as benzo(a)pyrene (BaP) and 2-Chlorobenzalmalononitrile (the active ingredient of CS powder) in the air samples (see Appendix II).
All the test results for dioxins, PCBs, PAHs as BaP and CS powder in the air samples are below the applicable reference levelsof international organisations.
Based on the safety assessments of the buildings on the North campus, including assessment of building structural safety and checking of indoor air quality, the results met the applicable health and safety references for resumption of operations. The University also cleaned the filters of air handling systems and potable water tanks as well as conducted a thorough clean-up of the campus and individual buildings.
The University is committed to providing PolyU members with a safe and healthy environment for study and work.