Table C-2 Predicted Noise Level (PNL) - Unmitigated
Installation of Underground Cable                      
  Activity   Total SWL NSRs SR1 SR2 SR3 SR4 SR5 SR6 SR7 SR8
        Construction Noise Criteria dB(A) 75 75 75 75 75 70 75 75
        Distance from source (m) 20 10 20 40 30 10 10 50
        Facade reflection dB(A) +3 +3 +3 +3 +3 +3 +3 +3
        Screening effect dB(A) 0 0 0 0 0 0 0 0
A Road Breaking A1 109   78 84 78 72 74 84 84 70
    A2 117   86 92 86 80 N.A. N.A. N.A. N.A.
    A3 112   81 87 81 75 N.A. N.A. N.A. N.A.
B Trench Excavation   112 Predicted Noise Level dB(A) 81 87 81 75 77 87 87 73
C Road Reinstatement C1 105   74 80 74 68 70 80 80 66
    C2 109   78 84 78 72 74 84 84 70
    C3 113   82 88 82 76 78 88 88 74
Construction of Cable Tunnel                      
  Activity   Total SWL NSRs SR1 SR2 SR3 SR4 SR5 SR6 SR7 SR8
        Distance from source (m) >300 >300 >300 70 >300 >300 >300 >300
        Facade reflection dB(A) +3 +3 +3 +3 +3 +3 +3 +3
        Screening effect dB(A) 0 0 0 0 0 0 0 0
A General   121   N.A. N.A. N.A. 79 N.A. N.A. N.A. N.A.
B Site Formation   123   N.A. N.A. N.A. 82 N.A. N.A. N.A. N.A.
C Using TBM (Envisaged Design)   92 Predicted Noise Level dB(A) N.A. N.A. N.A. 50 N.A. N.A. N.A. N.A.
D Drill & Blast (Alternative Design)   123   N.A. N.A. N.A. 82 N.A. N.A. N.A. N.A.
E Tunnel Lining   114   N.A. N.A. N.A. 72 N.A. N.A. N.A. N.A.
A+B General + Site Formation   125   N.A. N.A. N.A. 84 N.A. N.A. N.A. N.A.
A+D General + Drill & Blast   125 Predicted Noise Level dB(A) N.A. N.A. N.A. 84 N.A. N.A. N.A. N.A.
C+E TBM + Lining (Inside Tunnel)   114   N.A. N.A. N.A. 72 N.A. N.A. N.A. N.A.
Laying of Submarine Cable                        
  Activity   Total SWL NSRs SR1 SR2 SR3 SR4 SR5 SR6 SR7 SR8
        Distance fr source (m) >300 >300 >300 >300 100 >300 >300 >300
        Facade reflection dB(A) +3 +3 +3 3 +3 +3 +3 +3
        Screening effect dB(A) 0 0 0 0 0 0 0 0
A Laying Submarine Cable   #### Predicted Noise Level dB(A) N.A. N.A. N.A. N.A. #### N.A. N.A. N.A.
Note:
(1) Bolded value means PNL exceeds the daytime construction noise criteria.
(2) N.A. Either too far away (>300m) or no such activity
(3) SR1 Ham Tin Tsuen
SR2 Ham Tin Tsuen
SR3 Pui O Lo Wan Tsuen
SR4 Hostel (Lot No. 27) in the vicinity of Pui O Tunnel Portal
SR5 Greenery Crest
SR6 Buddhist Wai Yan Memorial College
SR7 Village House along Pak She Praya Street
SR8 Cheung Kwai Estate