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