Appendix B.1
Construction Impact Assessment
East Rail Extension - Sheung Shui to Lok Ma Chau Spur Line EIA
Assumptions for construction equipment for each construction activity
which has potential construction noise impact (unmitigated)
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Construction
Equipment Type |
Sound Power Level per piece |
Number of equipment |
Total Sound Power Level, dB |
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1. Site formation for temporary works areas, new permanent
access roads, and Lok MA Chau Terminus*** |
Dump Trucks* Bulldozers* Water Pumps (electric) Generators, silenced |
114.0 112.0 88.0 100.0 |
2 1 3 2 Activity : |
117.0 112.0 92.8 103.0 118 |
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2. Improvement Works to Existing Sheung Shui Station |
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Part 1* |
Bore piling machine |
115.0 |
2 |
118.0 |
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Activity : |
118.0 |
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Part 2 |
Concrete Lorries* |
106.0 |
2 |
109.0 |
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Wood Saw |
108.0 |
1 |
108.0 |
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Generators, silenced |
100.0 |
2 |
103.0 |
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Vibratory Pokers* |
110.0 |
5 |
117.0 |
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Bar Bender / Cutter |
90.0 |
1 |
90.0 |
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Welding Machine |
100.0 |
1 |
100.0 |
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Activity : |
118 |
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3. Alignment Construction |
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Part 1* |
Bore piling machines and oscillators |
115.0 |
1 |
115.0 |
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Activity : |
115 |
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Part 2 |
Concrete Lorries* |
106.0 |
1 |
106.0 |
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Wood Saw |
108.0 |
1 |
108.0 |
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Generators, silenced |
100.0 |
1 |
100.0 |
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Vibratory Pokers* |
110.0 |
3 |
114.8 |
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Bar Bender / Cutter |
90.0 |
1 |
90.0 |
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Welding Machine |
100.0 |
1 |
100.0 |
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Batching Plant |
108.0 |
1 |
108.0 |
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Activity : |
117 |
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Part 3 |
Gantry Hoist |
112.0 |
1 |
112.0 |
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Activity : |
112 |
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4. Water mains diversion near Sheung Shui |
Lorry* Welding Machine Generators, silenced Concrete Lorry* Hand Held Drill* Air Compressor |
109.0 100.0 100.0 106.0 100.0 102.0 |
1 1 1 1 1 1 Activity : |
109.0 100.0 100.0 106.0 100.0 102.0 112 |
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5. Hard, rippable material
at Pak Shek Au |
Bulldozer with Ripper* Dump Truck* |
112.0 114.0 |
1 1 Activity : |
112.0 114.0 116 |
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* Mobile equipment is
assumed to be operating at the Notional Point Source 50 % of working
time. |
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** Parts
represent different phase of the same activity in a sequence. |
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The equipment of different parts will not be operated
the same time. |
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*** The Lok Ma Chau Terminus site is over 500 m
away from any RNSRs. |
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6. Road Widening on Lok Ma Chau Road |
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Part 1 |
Excavator |
112 |
1 |
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Lorry* |
109.0 |
1 |
109.0 |
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Super-silenced Generator |
95.0 |
1 |
95.0 |
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Activity : |
114 |
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Part 2 |
Concrete Lorry Mixer* |
106.0 |
1 |
106.0 |
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Hand Held Vibratory Poker* |
110.0 |
1 |
110.0 |
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Super-silenced Generator |
95.0 |
1 |
95.0 |
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Activity : |
112 |
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Part 3 |
Asphalt Paver* |
106.0 |
1 |
106.0 |
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Road Roller* |
105.0 |
1 |
105.0 |
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Lorry* |
109.0 |
1 |
109.0 |
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Activity : |
112 |
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7. Construction of Huanggang Footbridge |
Pneumatic passenger Hoist Large Diameter Bore Piling - Grab and Chisel Vibratory Poker Tug Boat Concrete Lorry Mixer Concrete Pump Diesel Mobile Crane Tower Crane |
108.0 115.0 113.0 110.0 109.0 109.0 112.0 95.0 |
1 1 1 1 1 1 1 1 Activity : |
108.0 115.0 113.0 110.0 109.0 109.0 112.0 95.0 120 |
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* Mobile equipment is
assumed to be operating at the Notional Point Source 50 % of working
time. |
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** Parts represent different phase
of the same activity in a sequence. |
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The equipment
of different parts will not be operated the same time. |
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*** The Huanggang site is at least 650away from
any NSRs. |
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Appendix B.2
Unmitigated Predicted Noise Levels at Worst Affected Representative Noise
Sensitive Receivers during each Concurrent Group of Activities
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Refer to Section 3 Vol. Of Final EIA Report for definitions
of Groups A to D assessment Scenarios. |
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Group A1 Sound Power Level of Activity 1 = 118 dB
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Distance from Activity 1 |
Predicted noise levels due to Activity 1 |
Total predicted noise level at each RNSR
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RNSRs |
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21 |
50 |
79 |
79 |
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22 |
100 |
73 |
73 |
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19 |
50 |
79 |
79 |
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27 |
100 |
73 |
73 |
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Group A2 Sound Power Level of Activity 5 = 116 dB |
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Distance from Activity 5 |
Predicted noise levels due to Activity 5 |
Total predicted noise level at each RNSR
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RNSRs |
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21 |
50 |
77 |
77 |
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22 |
25 |
83 |
83 |
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23 |
80 |
73 |
73 |
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23 |
15 |
87 |
87 |
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Group A3 Sound Power Level of Activity 7 = 120 dB
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Distance from Activity 7 |
Predicted noise levels due to Activity 1 |
Total predicted noise level at each RNSR
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RNSRs |
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33 |
650 |
59 |
59 |
Group B
Sound Power Level of Activity 3, Part 1 = 115 dB.
Sound Power Level of Activity 3, Part 2 = 117 dB.
Sound Power Level of Activity 3, Part 3 = 112 dB.
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Distance
from
Activity
3, Part 1, m |
Predicted
noise levels due
to Activity 3, Part 1 |
Distance
from Activity
3, Part 2, m |
Predicted
noise levels due
to Activity 3, Part 2 |
Distance
from Activity
3, Part 3, m |
Predicted
noise levels due
to Activity 3, Part 3 |
Total
predicted noise levels at each RNSR |
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RNSRs |
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13 |
30 |
80 |
30 |
82 |
30 |
77 |
85 |
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14 |
30 |
80 |
30 |
82 |
30 |
77 |
85 |
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22 |
30 |
80 |
30 |
82 |
30 |
77 |
85 |
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23 |
80 |
72 |
80 |
74 |
80 |
69 |
77 |
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24 |
30 |
80 |
30 |
82 |
30 |
77 |
85 |
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25 |
25 |
82 |
25 |
84 |
25 |
79 |
87 |
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26 |
100 |
70 |
100 |
72 |
100 |
67 |
75 |
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27 |
40 |
78 |
40 |
80 |
40 |
75 |
83 |
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28 |
60 |
74 |
60 |
76 |
60 |
71 |
79 |
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29 |
60 |
74 |
60 |
76 |
60 |
71 |
79 |
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30 |
60 |
74 |
60 |
76 |
60 |
71 |
79 |
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31 |
50 |
76 |
50 |
78 |
50 |
73 |
81 |
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32 |
60 |
74 |
60 |
76 |
60 |
71 |
79 |
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33 |
110 |
69 |
110 |
71 |
110 |
66 |
74 |
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Group C
Sound Power Level of Activity 2, Part 1 = 118 dB.
Sound Power Level of Activity 2, Part 2 = 118 dB.
Sound Power Level of Activity 4 = 112 dB.
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Distance
from Activity
2, Part 1, m |
Predicted
noise levels due
to Activity 2, Part 1 |
Distance
from Activity
2, Part 2, m |
Predicted
noise levels due
to Activity 2, Part 2 |
Distance
from Activity
4, m |
Predicted
noise levels due
to Activity 4 |
Total
predicted noise levels at each RNSR |
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RNSRs |
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1 |
96 |
73 |
96 |
73 |
/ |
0 |
76 |
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2 |
52 |
79 |
52 |
79 |
/ |
0 |
82 |
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3 |
45 |
80 |
45 |
80 |
175 |
62 |
83 |
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5 |
60 |
77 |
60 |
77 |
60 |
71 |
81 |
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6 |
130 |
71 |
130 |
71 |
50 |
73 |
76 |
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7 |
135 |
70 |
135 |
70 |
100 |
67 |
74 |
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9 |
/ |
0 |
/ |
0 |
130 |
65 |
65 |
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13 |
/ |
0 |
/ |
0 |
15 |
83 |
83 |
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14 |
/ |
0 |
/ |
0 |
15 |
83 |
83 |
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Group D Sound Power Level of Activity 6, Part 2 or 3 = 112
dB
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Group D Sound Power Level of Authority, Part 1 = 114 dB |
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Distance from Activity 6, Part 2 or 3, m |
Predicted noise levels Activity 6, Part 2 or 3, dB(A) |
Distance from Activity 6, Part 1, m
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Predicted noise
levels Activity 6, Part 1, dB(A)
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RNSRs |
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RNSRs |
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34 |
20 |
81 |
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34 |
20 |
83 |
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35 |
15 |
83 |
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35 |
15 |
85 |