Agreement No. CE 1/2008 (WS) Environmental Impact Assessment Improvement of Fresh Water Supply to Cheung Chau Final Report - Investigation 2831/B&V/015/Issue 3

January 2010 [2831_EIA_fs_v3_jan10.doc] B&V

Appendix 8.1

Details of Construction Noise Impact Assessment

Appendix 8.1Equipment List and Associated Sound Power Level for Construction Activities (unmitigated)

(A) Horizontal Directional Drilling at Cheung ChauA1. Site Clearance / Formation & Equipment mobilizationType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator / loader 081 112 2 118Crane 048 112 1Village vehicle # (note 1) 101 2Generator, silenced 102 100 3Derrick barge 061 104 1Tug boat 221 110 1Concrete mixer (petrol) 046 96 1

A2. Drilling (Pilot bore, Forward reaming)Type of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Crane 048 112 1 119Drilling rig # 110 1Agitator # 90 1Drilling fluid mixer # 90 1Drilling fluid pump # 105 3Bentonite filtering plant 162 105 1Mud tanks and recycling unit (pump) # 105 4Water / mud pump (electric) 281 88 5Hydraulic power pack # 100 3Village vehicle # (note 1) 101 2Generator (for drilling rig) 101 108 1Generator, silenced 102 100 3Air compressor 003 104 2

A3. Pipe installation and connectionsType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Crane 048 112 1 119Drilling rig # 110 1Agitator # 90 1Drilling fluid mixer # 90 1Drilling fluid pump # 105 3Bentonite filtering plant 162 105 1Mud tanks and recycling unit (pump) # 105 4Water / mud pump (electric) 281 88 5Hydraulic power pack # 100 3Hand held drill / grinder (electric) 065 98 1Saw, wire # 101 1Village vehicle # (note 1) 101 2Generator (for drilling rig) 101 108 1Generator, silenced 102 100 3Air compressor 003 104 2

A4. Testing and commissioningTM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)

Crane 048 112 1 115Village vehicle # (note 1) 101 2Water / mud pump (electric) 281 88 2Hydraulic power pack # 100 3Generator, silenced 102 100 3Air compressor 003 104 2

A5. Demobilization & site reinstatementType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator / loader 081 112 1 117Crane 048 112 1Village vehicle # (note 1) 101 2Generator, silenced 102 100 2Derrick barge 061 104 1Tug boat 221 110 1Concrete mixer (petrol) 046 96 1

(B) Construction of land-based water main at Cheung ChauB1. Road breakingType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Hand-held breaker 026 114 1 114Air compressor 002 102 1

B2. Trench excavationType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator 081 112 1 113Village vehicle # (note 1) 101 1Water pump, submersible 283 85 1Generator, silenced 102 100 1

B3. Pipe layingType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator 081 112 1 113Village vehicle # (note 1) 101 1Power pack (for pipe fusion machine) 168 100 1Hand held drill / grinder (electric) 065 98 1Water pump, submersible 283 85 1Generator, silenced 102 100 1

B4. BackfillingType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator 081 112 1 113Power rammer 169 108 1

B4. Road reinstatementType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Village vehicle # (note 1) 101 1 102Concrete mixer (petrol) 046 96 1

PME = Powered Mechanical EquipmentSWL = Sound Power LevelTM = Technical Memorandum on Noise from Construction Work other than Percussive PilingBS = BS 5228# = Sound power level of other commonly used PME (source: EPD website on Guidance Notes for Licence Application under the NCO)note 1 = equivalent to light goods vehicle

2831_EIA_CNOISE_dec09.xls Page 1 of 6 eqmt

Appendix 8.1Equipment List and Associated Sound Power Levels for the Construction Activities (Level 1 mitigation : Use of Quiet Plant)

(A) Horizontal Directional Drilling at Cheung ChauA1. Site Clearance / Formation & MobilizationType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator / loader C.4-64 103 2 114Crane C.4-50 99 1Village vehicle # (note 1) 101 2Generator, silenced 102 100 3Derrick barge 061 104 1Tug boat 221 110 1Concrete mixer (petrol) 046 96 1

A2. Drilling (Pilot bore, Forward reaming)Type of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Crane C.4-50 99 1 118Drilling rig # 110 1Agitator # 90 1Drilling fluid mixer # 90 1Drilling fluid pump # 105 3Bentonite filtering plant 162 105 1Mud tanks and recycling unit (pump) # 105 4Water / mud pump 281 88 5Hydraulic power pack # 100 3Village vehicle # (note 1) 101 2Generator (for drilling rig) 101 108 1Generator, silenced 102 100 3Air compressor 003 104 2

A3. Pipe installation and connectionsType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Crane C.4-50 99 1 118Drilling rig # 110 1Agitator # 90 1Drilling fluid mixer # 90 1Drilling fluid pump # 105 3Bentonite filtering plant 162 105 1Mud tanks and recycling unit (pump) # 105 4Water / mud pump 281 88 5Hydraulic power pack # 100 3Hand held drill / grinder (electric) 065 98 1Saw, wire # 101 1Village vehicle # (note 1) 101 2Generator (for drilling rig) 101 108 1Generator, silenced 102 100 3Air compressor 003 104 2

A4. Testing and commissioningTM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)

Crane C.4-50 99 1 112Village vehicle # (note 1) 101 2Water / mud pump 281 88 2Hydraulic power pack # 100 3Generator, silenced 102 100 3Air compressor 003 104 2

A5. Demobilization & site reinstatementType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator / loader C.4-64 103 1 113Crane C.4-50 99 1Village vehicle # (note 1) 101 2Generator, silenced 102 100 2Derrick barge 061 104 1Tug boat 221 110 1Concrete mixer (petrol) 046 96 1

(B) Construction of land-based water main at Cheung ChauB1. Road breakingType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Hand-held breaker (note 2) 107 1 108Air compressor 002 100 1

B2. Trench excavationType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator C.4-64 103 1 106Village vehicle # (note 1) 101 1Water pump, submersible 283 85 1Generator, silenced 102 100 1

B3. Pipe layingType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator C.4-64 103 1 108Village vehicle # (note 1) 101 1Power pack (for pipe fusion machine) 168 100 1Hand held drill / grinder (electric) 065 98 1Water pump, submersible 283 85 1Generator, silenced 102 100 1

B4. BackfillingType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Excavator C.4-64 103 1 107Power rammer D.3-119 105 1

B4. Road reinstatementType of PME TM Code / BS Ref. SWL - dB(A) No. of Units Total SWL - dB(A)Village vehicle # (note 1) 101 1 102Concrete mixer (petrol) 046 96 1

PME = Powered Mechanical EquipmentSWL = Sound Power LevelTM = Technical Memorandum on Noise from Construction Work other than Percussive PilingBS = BS 5228# = Sound power level of other commonly used PME (source: EPD website on Guidance Notes for Licence Application under the NCO)note 1 = equivalent to light goods vehiclenote 2 = use hand-held breaker with noise level of 107 dB(A) or below.

2831_EIA_CNOISE_dec09.xls Page 2 of 6 eqmt (quiet)

Appendix 8.1Equipment Lists and Associated Sound Power Level for Construction Activities (Level 2 Mitigation : Quiet Plant + Temporary Barrier)

(A) Horizontal Directional Drilling at Cheung ChauA1. Site Clearance / Formation & MobilizationType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Excavator / loader C.4-64 103 -5 98 2 112Crane C.4-50 99 -5 94 1Village vehicle # (note 1) 101 -5 96 2Generator, silenced 102 100 -10 90 3Derrick barge 061 104 0 104 1Tug boat 221 110 0 110 1Concrete mixer (petrol) 046 96 -10 86 1

A2. Drilling (Pilot bore, Forward reaming)Type of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Crane C.4-50 99 -5 94 1 108Drilling rig # 110 -10 100 1Agitator # 90 -10 80 1Drilling fluid mixer # 90 -10 80 1Drilling fluid pump # 105 -10 95 3Bentonite filtering plant 162 105 -10 95 1Mud tanks and recycling unit (pump) # 105 -10 95 4Water / mud pump 281 88 -10 78 5Hydraulic power pack # 100 -10 90 3Village vehicle # (note 1) 101 -5 96 2Generator (for drilling rig) 101 108 -10 98 1Generator, silenced 102 100 -10 90 3Air compressor 003 104 -10 94 2

A3. Pipe installation and connectionsType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Crane C.4-50 99 -5 94 1 108Drilling rig # 110 -10 100 1Agitator # 90 -10 80 1Drilling fluid mixer # 90 -10 80 1Drilling fluid pump # 105 -10 95 3Bentonite filtering plant 162 105 -10 95 1Mud tanks and recycling unit (pump) # 105 -10 95 4Water / mud pump 281 88 -10 78 5Hydraulic power pack # 100 -10 90 3Hand held drill / grinder (electric) 065 98 -10 88 1Saw, wire # 101 -10 91 1Village vehicle # (note 1) 101 -5 96 2Generator (for drilling rig) 101 108 -10 98 1Generator, silenced 102 100 -10 90 3Air compressor 003 104 -10 94 2

A4. Testing and commissioningTM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)

Crane C.4-50 99 -5 94 1 103Village vehicle # (note 1) 101 -5 96 2Water / mud pump 281 88 -10 78 2Hydraulic power pack # 100 -10 90 3Generator, silenced 102 100 -10 90 3Air compressor 003 104 -10 94 2

A5. Demobilization & site reinstatementType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Excavator / loader C.4-64 103 -5 98 1 112Crane C.4-50 99 -5 94 1Village vehicle # (note 1) 101 -5 96 2Generator, silenced 102 100 -10 90 2Derrick barge 061 104 0 104 1Tug boat 221 110 0 110 1Concrete mixer (petrol) 046 96 -10 86 1

(B) Construction of land-based water main at Cheung ChauB1. Road breakingType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Hand-held breaker (note 2) 107 0 107 1 108Air compressor 002 100 0 100 1

B2. Trench excavationType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Excavator C.4-64 103 0 103 1 106Village vehicle # (note 1) 101 0 101 1Water pump, submersible 283 85 0 85 1Generator 102 100 0 100 1

B3. Pipe layingType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Excavator C.4-64 103 0 103 1 108Village vehicle # (note 1) 101 0 101 1Power pack (for pipe fusion machine) 168 100 0 100 1Hand held drill / grinder (electric) 065 98 0 98 1Water pump, submersible 283 85 0 85 1Generator 102 100 0 100 1

B4. BackfillingType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Excavator C.4-64 103 0 103 1 107Power rammer D.3-119 105 0 105 1

B4. Road reinstatementType of PME TM Code / BS Ref. SWL - dB(A) Barrier Correction Corrected SWL No. of Units Total SWL - dB(A)Village vehicle # (note 1) 101 0 101 1 102Concrete mixer (petrol) 046 96 0 96 1

PME = Powered Mechanical EquipmentSWL = Sound Power LevelTM = Technical Memorandum on Noise from Construction Work other than Percussive PilingBS = BS 5228# = Sound power level of other commonly used PME (source: EPD website on Guidance Notes for Licence Application under the NCO)note 1 = equivalent to light goods vehiclenote 2 = use hand-held breaker with noise level of 107 dB(A) or below.

2831_EIA_CNOISE_dec09.xls Page 3 of 6 eqmt (quiet+barrier+restrict)

Appendix 8.1Predicted Construction Noise Levels (unmitigated) at Representative NSRs

NSR Construction Activities Total SWLdB(A)

HorizontalDistance

(m)

VerticalDistance

(m)

DistanceCorrection

dB(A)

FacadeCorrection

dB(A)

Predicted Noise Level dB(A)

A1 Site clearance / formation & equipment mobilization 118 86 35 47 + 3.0 74

A2 Drilling (pilot bore & forward reaming) 119 86 35 47 + 3.0 74

A3 Pipe installation and connections 119 86 35 47 + 3.0 74

A4 Testing and commissioning 115 86 35 47 + 3.0 70

A5 Demobilization & site reinstatement 117 86 35 47 + 3.0 73

B1 Road breaking 114 90 35 48 + 3.0 70

B2 Trench excavation 113 90 35 48 + 3.0 68

B3 Pipe laying 113 90 35 48 + 3.0 68

B4 Backfilling 113 90 35 48 + 3.0 69

B5 Road reinstatement 102 90 35 48 + 3.0 57

A1 Site clearance / formation & equipment mobilization 118 62 10 44 + 3.0 77

A2 Drilling (pilot bore & forward reaming) 119 62 10 44 + 3.0 78

A3 Pipe installation and connections 119 62 10 44 + 3.0 78

A4 Testing and commissioning 115 62 10 44 + 3.0 74

A5 Demobilization & site reinstatement 117 62 10 44 + 3.0 76

B1 Road breaking 114 22 10 36 + 3.0 82

B2 Trench excavation 113 22 10 36 + 3.0 80

B3 Pipe laying 113 22 10 36 + 3.0 80

B4 Backfilling 113 22 10 36 + 3.0 81

B5 Road reinstatement 102 22 10 36 + 3.0 70

A1 Site clearance / formation & equipment mobilization 118 166 16 52 + 3.0 69

A2 Drilling (pilot bore & forward reaming) 119 166 16 52 + 3.0 69

A3 Pipe installation and connections 119 166 16 52 + 3.0 69

A4 Testing and commissioning 115 166 16 52 + 3.0 65

A5 Demobilization & site reinstatement 117 166 16 52 + 3.0 67

B1 Road breaking 114 48 16 42 + 3.0 75

B2 Trench excavation 113 48 16 42 + 3.0 74

B3 Pipe laying 113 48 16 42 + 3.0 74

B4 Backfilling 113 48 16 42 + 3.0 74

B5 Road reinstatement 102 48 16 42 + 3.0 63

A1 Site clearance / formation & equipment mobilization 118 192 2 54 + 3.0 68

A2 Drilling (pilot bore & forward reaming) 119 192 2 54 + 3.0 68

A3 Pipe installation and connections 119 192 2 54 + 3.0 68

A4 Testing and commissioning 115 192 2 54 + 3.0 64

A5 Demobilization & site reinstatement 117 192 2 54 + 3.0 66

B1 Road breaking 114 75 2 46 + 3.0 72

B2 Trench excavation 113 75 2 46 + 3.0 70

B3 Pipe laying 113 75 2 46 + 3.0 70

B4 Backfilling 113 75 2 46 + 3.0 71

B5 Road reinstatement 102 75 2 46 + 3.0 60

Notes:Daytime construction noise criteria: residential premises 75 dB(A)Please refer to Figure 8.1 for location of NSR.Figures in BOLD denote exceedance of the daytime construction noise standards

NSR 1

NSR 2

NSR 3

NSR 4

2831_EIA_CNOISE_dec09.xls Page 4 of 6 PNL (unmit)

Appendix 8.1Predicted Construction Noise Levels (Level 1 Mitigation : Use of Quiet Plant) at Representative NSRs

NSR Construction Activities Total SWLdB(A)

HorizontalDistance

(m)

VerticalDistance

(m)

DistanceCorrection

dB(A)

FacadeCorrection

dB(A)

Predicted Noise Level dB(A)

A1 Site clearance / formation & equipment mobilization 114 86 35 47 + 3.0 69

A2 Drilling (pilot bore & forward reaming) 118 86 35 47 + 3.0 73

A3 Pipe installation and connections 118 86 35 47 + 3.0 73

A4 Testing and commissioning 112 86 35 47 + 3.0 67

A5 Demobilization & site reinstatement 113 86 35 47 + 3.0 69

B1 Road breaking 108 90 35 48 + 3.0 63

B2 Trench excavation 106 90 35 48 + 3.0 62

B3 Pipe laying 108 90 35 48 + 3.0 63

B4 Backfilling 107 90 35 48 + 3.0 62

B5 Road reinstatement 102 90 35 48 + 3.0 57

A1 Site clearance / formation & equipment mobilization 114 62 10 44 + 3.0 73

A2 Drilling (pilot bore & forward reaming) 118 62 10 44 + 3.0 77

A3 Pipe installation and connections 118 62 10 44 + 3.0 77

A4 Testing and commissioning 112 62 10 44 + 3.0 71

A5 Demobilization & site reinstatement 113 62 10 44 + 3.0 72

B1 Road breaking 108 22 10 36 + 3.0 75

B2 Trench excavation 106 22 10 36 + 3.0 74

B3 Pipe laying 108 22 10 36 + 3.0 75

B4 Backfilling 107 22 10 36 + 3.0 74

B5 Road reinstatement 102 22 10 36 + 3.0 70

A1 Site clearance / formation & equipment mobilization 114 166 16 52 + 3.0 64

A2 Drilling (pilot bore & forward reaming) 118 166 16 52 + 3.0 68

A3 Pipe installation and connections 118 166 16 52 + 3.0 68

A4 Testing and commissioning 112 166 16 52 + 3.0 62

A5 Demobilization & site reinstatement 113 166 16 52 + 3.0 64

B1 Road breaking 108 48 16 42 + 3.0 69

B2 Trench excavation 106 48 16 42 + 3.0 67

B3 Pipe laying 108 48 16 42 + 3.0 69

B4 Backfilling 107 48 16 42 + 3.0 68

B5 Road reinstatement 102 48 16 42 + 3.0 63

A1 Site clearance / formation & equipment mobilization 114 192 2 54 + 3.0 63

A2 Drilling (pilot bore & forward reaming) 118 192 2 54 + 3.0 67

A3 Pipe installation and connections 118 192 2 54 + 3.0 67

A4 Testing and commissioning 112 192 2 54 + 3.0 61

A5 Demobilization & site reinstatement 113 192 2 54 + 3.0 62

B1 Road breaking 108 75 2 46 + 3.0 65

B2 Trench excavation 106 75 2 46 + 3.0 64

B3 Pipe laying 108 75 2 46 + 3.0 65

B4 Backfilling 107 75 2 46 + 3.0 65

B5 Road reinstatement 102 75 2 46 + 3.0 60

Notes:Daytime construction noise criteria: residential premises 75 dB(A)Please refer to Figure 8.1 for location of NSR.Figures in BOLD denote exceedance of the daytime construction noise standards

NSR 1

NSR 2

NSR 3

NSR 4

2831_EIA_CNOISE_dec09.xls Page 5 of 6 PNL (mit 1)

Appendix 8.1Predicted Construction Noise Levels (Level 2 Mitigation : Use of Quiet Plant + Temporary Noise Barrier) at Representative NSRs

NSR Construction Activities Total SWLdB(A)

HorizontalDistance

(m)

VerticalDistance

(m)

DistanceCorrection

dB(A)

FacadeCorrection

dB(A)

Predicted Noise Level dB(A)

A1 Site clearance / formation & equipment mobilization 112 62 10 44 + 3.0 71

A2 Drilling (pilot bore & forward reaming) 108 62 10 44 + 3.0 67

A3 Pipe installation and connections 108 62 10 44 + 3.0 67

A4 Testing and commissioning 103 62 10 44 + 3.0 62

A5 Demobilization & site reinstatement 112 62 10 44 + 3.0 71

Notes:Daytime construction noise criteria: residential premises 75 dB(A)Please refer to Figure 8.1 for location of NSR.Figures in BOLD denote exceedance of the daytime construction noise standards

NSR 2

2831_EIA_CNOISE_dec09.xls Page 6 of 6 PNL (mit 2)

Agreement No. CE 1/2008 (WS) Improvement of Fresh Water Supply to Cheung Chau - Investigation

[Appendix8.1_Fig_1_Photos of NSRs.doc] B&V

APPENDIX 8.1

NSR 1 NSR 2

NSR 3 NSR 4

Figure 1 Photographs of the Representative Noise Sensitive Receivers