Hong Kong authorities have vowed to work through the night and into the morning to clean all water tanks at a private residential estate in Quarry Bay that were found to contain bitumen, the city’s fifth such case this year.
The Water Supplies Department said on Sunday night that its laboratory tests had confirmed that the black particles found in the polluted drinking water of 14 blocks of the Taikoo Shing residential development in Quarry Bay were bitumen.
Bitumen is a black, sticky substance…