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

Works Contracts	Photographic Records
ND/2019/01	Hard paved exposed slope surface	Hydroseeding for slope area
ND/2019/02	Hard paved exposed slope surface	Temporary ditches to direct storm water to wastewater treatment facilities
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	Deployment of silt curtain around works area in Ng Tung Rive
ND/2019/05	Provision of sand bags around works area	Temporary ditches to direct storm water to wastewater treatment facilities
ND/2019/06	Grasscrete for slope protection	Provision of concrete berm around site area
ND/2019/07	Covering exposed slope surface with tarpaulin	Temporary rainwater storage area for rainstorm event