Appendix 4.2       Tentative Construction Programme (Dechlorination Plant)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2008

2009

Construction Tasks

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Site formation & site establishment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Excavation and backfilling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Erection of formwork, reinforcement fixing & concreting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fabrication of steelwork

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Installation of E&M equipment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Testing and commissioning

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix 4.2

Construction Noise Impact Assessment

 

 

 

 

 

 

 

 

 

 

 

Powered Mechanical Equipment (PME) for Different Construction Tasks during 

Normal Daytime Working Hours (Unmitigated Scenario)

 

 

 

 

 

 

 

 

 

 

 

 

Proposed Dechlorination Plant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Site formation & site establishment

 

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

 

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Breaker, excavator mounted

-

-

CNP028

1

122

100%

0

122

Excavator

-

-

CNP081

1

112

100%

0

112

Dump Truck

-

-

CNP067

1

117

100%

0

117

Air Compressor

-

-

CNP002

1

102

100%

0

102

Generator

-

-

CNP102

1

100

100%

0

100

 

 

 

 

 

 

 

Total

124

 

 

 

 

 

 

 

 

 

Excavation and backfilling

 

 

 

 

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

No. Items

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Dump Truck

-

-

CNP067

1

117

100%

0

117

Excavator

-

-

CNP081

1

112

100%

0

112

Generator

-

-

CNP102

1

100

100%

0

100

Air Compressor

-

-

CNP002

1

102

100%

0

102

Breaker, excavator mounted

-

-

CNP028

1

122

100%

0

122

 

 

 

 

 

 

 

Total

124

 

 

 

 

 

 

 

 

 

Erection of formwork, reinforcement fixing & concreting

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

No. Items

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Mobile Crane

-

-

CNP048

1

112

100%

0

112

Concrete Lorry Mixer

-

-

CNP044

1

109

100%

0

109

Bar Bender and cutter

-

-

CNP021

1

90

100%

0

90

Concete Pump

-

-

CNP047

1

109

100%

0

109

Poker

-

-

CNP170

3

113

100%

0

118

Chipper, hand held

-

-

CNP043

1

112

100%

0

112

Saw, circular wood

-

-

CNP201

1

108

100%

0

108

Generator

-

-

CNP102

1

100

100%

0

100

Air Compressor

-

-

CNP002

1

102

100%

0

102

 

 

 

 

 

 

 

Total

121

 

 

 

 

 

 

 

 

 

Fabrication of steelwork 

 

 

 

 

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

No. Items

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Backhoe

-

-

CNP081

1

112

100%

0

112

Mobile Crane

-

-

CNP048

1

112

100%

0

112

Lorry

-

-

CNP141

1

112

100%

0

112

Generator

-

-

CNP102

1

100

100%

0

100

Air Compressor

-

-

CNP002

1

102

100%

0

102

 

 

 

 

 

 

 

Total

117

 

 

Appendix 4.2

Construction Noise Impact Assessment

 

 

 

 

 

 

 

 

 

 

 

Powered Mechanical Equipment (PME) for Different Construction Tasks during Normal

Daytime Working Hours (Mitigated Scenario - Use of Quiet Plant)

 

 

 

 

 

 

 

 

 

 

 

Proposed Dechlorination Plant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Site formation & site establishment

 

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

 

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Breaker, excavator mounted

[1]

-

C2/4

1

119

100%

0

119

Excavator

[1]

-

C3/97

1

105

100%

0

105

Dump Truck

[1]

-

C9/20

1

103

100%

0

103

Air Compressor

-

-

CNP002

1

102

100%

0

102

Generator

[1]

-

CNP 103

1

95

100%

0

95

 

 

 

 

 

 

 

Total

119

 

 

 

 

 

 

 

 

 

Excavation and backfilling

 

 

 

 

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

No. Items

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Dump Truck

[1]

-

C9/20

1

103

100%

0

103

Excavator

[1]

-

C3/97

1

105

100%

0

105

Generator

[1]

-

CNP 103

1

95

100%

0

95

Air Compressor

-

-

CNP002

1

102

100%

0

102

Breaker, excavator mounted

[1]

-

C2/4

1

119

100%

0

119

 

 

 

 

 

 

 

Total

119

 

 

 

 

 

 

 

 

 

Erection of formwork, reinforcement fixing & concreting

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

No. Items

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Mobile Crane

[1]

-

C7/114

1

101

100%

0

101

Concrete Lorry Mixer

[1]

-

C6/23

1

100

100%

0

100

Bar Bender and cutter

-

-

CNP021

1

90

100%

0

90

Concete Pump

[1]

-

C6/36

1

106

100%

0

106

Poker

[1]

-

C6/32

3

100

100%

0

105

Chipper, hand held

-

-

CNP043

1

112

100%

0

112

Saw, circular wood

-

-

CNP201

1

108

100%

0

108

Generator

[1]

-

CNP 103

1

95

100%

0

95

Air Compressor

-

-

CNP002

1

102

100%

0

102

 

 

 

 

 

 

 

Total

115

 

 

 

 

 

 

 

 

 

Fabrication of steelwork

 

 

 

 

 

 

 

 

Powered Mechanical Equipment

 

TM Ref./

No. Items

SWL/Item

On-time

Noise Barrier

Total SWL

(PME)

 

 

other Ref.

 

dB(A)

%

Reduction

dB(A)

Backhoe

[1]

-

C8/33

1

102

100%

0

102

Mobile Crane

[1]

-

C7/114

1

101

100%

0

101

Lorry

[1]

-

C3/59

1

105

100%

0

105

Generator

[1]

-

CNP 103

1

95

100%

0

95

Air Compressor

-

-

CNP002

1

102

100%

0

102

 

 

 

 

 

 

 

Total

109

Note: (1) Use of Quiet PME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix 4.2     Construction Noise Impact Assessment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Calculation of Construction Noise Levels at Representative NSR - Unmitigated Scenario

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NSR: N1

 

 

 

2008

2009

 

SWL

Distance

SPL

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Site formation & site establishment

124

120

77

 

 

 

 

 

 

77

77

 

 

 

 

 

 

 

 

 

 

 

Excavation and backfilling

124

120

77

 

 

 

 

 

 

 

 

77

 

 

 

 

 

 

 

 

 

 

Erection of formwork, reinforcement fixing & concreting

121

120

74

 

 

 

 

 

 

 

 

 

74

74

74

 

 

 

 

 

 

 

Fabrication of steelwork

117

120

70

 

 

 

 

 

 

 

 

 

 

 

70

70

70

70

70

 

 

 

Installation of E&M equipment #

-

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

-

 

 

Testing and commissioning #

-

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

-

-

 

 

 

Total SPL, dB(A)

 

 

 

 

 

 

77

77

77

74

74

76

70

70

70

70

-

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

# As advised by DSD, no PME would be required for installation of E&M equipment and testing & commissiong

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix 4.2     Construction Noise Impact Assessment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Calculation of Construction Noise Levels at Representative NSR - Mitigated Scenario

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NSR: N1

 

 

 

2008

2009

 

SWL

Distance

SPL

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Site formation & site establishment

119

120

73

 

 

 

 

 

 

73

73

 

 

 

 

 

 

 

 

 

 

 

Excavation and backfilling

119

120

73

 

 

 

 

 

 

 

 

73

 

 

 

 

 

 

 

 

 

 

Erection of formwork, reinforcement fixing & concreting

115

120

69

 

 

 

 

 

 

 

 

 

69

69

69

 

 

 

 

 

 

 

Fabrication of steelwork

109

120

62

 

 

 

 

 

 

 

 

 

 

 

62

62

62

62

62

 

 

 

Installation of E&M equipment #

-

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

-

 

 

Testing and commissioning #

-

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

-

-

 

 

 

Total SPL, dB(A)

 

 

 

 

 

 

73

73

73

69

69

70

62

62

62

62

-

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

# As advised by DSD, no PME would be required for installation of E&M equipment and testing & commissiong