Appendix A – Emission Factor for General Construction

        

 

Emission Factor             = 1.2 tons per acre of construction per month of activity

                                    = 296.5 g/m2/month

 

Assumption:                  Based on 26 working day per month and 10 operation hours per day

 

                                    296.5 g/m2/month = 296.5 x 1/26 x 10 x 60 x 60 g/m2/month

                                                               = 3.2 x 10-4 g/s/m2     

 

Emission Strength of Identified Sources

 

Assumption: 40% of the site area used concurrently for various construction activities

 

Reclamation Area at Pui O                                            : 3.2 x 10-4 g/s/m2 x 40%

                                                                                      1.28 x 10-4 g/s/m2

 

Excavation Area at Pui O Tunnel Portal                                     : 3.2 x 10-4 g/s/m2 x 40%

                                                                                      1.28 x 10-4 g/s/m2

 

Excavation Area at Tai Long Wan Tunnel Portal             : 3.2 x 10-4 g/s/m2 x 40%

                                                                                      1.28 x 10-4 g/s/m2

 

Cable Trench at South Lantau (1.2m trench width)          : 3.2 x 10-4 g/s/m2 x 1.2m x 40%

                                                                                      1.536 x 10-4 g/s/m

 

Cable Trench at Cheung Chau (1.2m trench width)         : 3.2 x 10-4 g/s/m2 x 1.2m x 40%

                                                                                      1.536 x 10-4 g/s/m