Table 10.4 Specific Water Quality Mitigation Measures for Major Construction Works in the Reporting Month

Works Contracts	Photographic Records
ND/2019/01	Temporary wastewater storage tank for storm water retention		Hydroseeding for stockpile area
ND/2019/02	Provision of sand bags around works area		Covering exposed slope surface by tarpaulin
ND/2019/03	Wastewater from wheel washing was directed to wastewater treatment facility		Regular clearance of water for wheel washing facility
ND/2019/04	Surface channels and earth bunds to direct storm water to wastewater treatment facilities for works area near Siu Hang San Tsuen Stream	Provision of wastewater treatment facilities for works area near Siu Hang San Tsuen Stream		Deployment of silt curtain around works area in Ng Tung River
ND/2019/05	Deployment of sand bags around works area		Smart checking operation of wastewater treatment facilities
ND/2019/06	Grasscrete for slope protection		Provision of concrete berm around site area
ND/2019/07	Covering exposed slope surface by tarpaulin		Additional wastewater treatment facilities for rainstorm event