Speaking at the press briefing on the project after the contract signing ceremony , the director of drainage services , mr raymond cheung tat - kwing , said today ( august 27 ) that tertiary - level treatment was given to the sewage collected at ngong ping in order to protect this environmentally sensitive area and the water quality of the water gathering ground for shek pik reservoir and other receiving water bodies 渠务署署长张达?今日（八月二十七日）在签约仪式后，向传媒简介工程内容时表示，为保护这环境敏感地带和石壁水塘集水区及其他接收水域的水质，因此在昂坪收集的污水，将采用三级程度处理。
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