| Appendix 4.7 |
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| Predicted
Noise Levels from Submarine Outfall
Construction (Unmitigated) |
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| Sensitive receiver |
Distance
from Construction Activities, m |
Erection of Steel
Working Platform1 |
Erection
of of Scaffold |
Drilling and
Installation of HDPE Pipeline |
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| SWL |
117.7 |
116.1 |
111.6 |
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| |
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117.69 |
0.00 |
111.65 |
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| CMV1 |
-- |
-- |
-- |
-- |
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| CMV2 |
-- |
-- |
-- |
-- |
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| CMV3 |
-- |
-- |
-- |
-- |
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| CMV4 |
-- |
-- |
-- |
-- |
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| CMV5 |
-- |
-- |
-- |
-- |
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| CMV6 |
-- |
-- |
-- |
-- |
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| THT |
-- |
-- |
-- |
-- |
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| SKW1 |
-- |
-- |
-- |
-- |
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| SKW2 |
-- |
-- |
-- |
-- |
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| SKW3 |
-- |
-- |
-- |
-- |
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| SKW4 |
-- |
-- |
-- |
-- |
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| SKW5 |
-- |
-- |
-- |
-- |
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| SKW6 |
-- |
-- |
-- |
-- |
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| SKW7 |
-- |
-- |
-- |
-- |
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| SKW8 |
-- |
-- |
-- |
-- |
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| SKW9 |
-- |
-- |
-- |
-- |
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| SKW10 |
-- |
-- |
-- |
-- |
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| SKW11 |
-- |
-- |
-- |
-- |
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| SKW12 |
-- |
-- |
-- |
-- |
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| TSW1 |
-- |
-- |
-- |
-- |
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| TSW2 |
-- |
-- |
-- |
-- |
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| TSW3 |
-- |
-- |
-- |
-- |
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| TSW4 |
-- |
-- |
-- |
-- |
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| MTW1 |
190 |
67.1 |
65.5 |
61.0 |
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| MTW2 |
240 |
65.1 |
63.5 |
59.0 |
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| Note: |
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| 3
dB(A) facade effect was added in the calculation |
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| --
The noise level at this particular NSR is negligible as it would be
more than 300m away from the construction activity. |
|
| 1 Since the three stages of "Erection of Steel Working
Platform" would not be carried out concurrently, the highest total
SWLs amongst the three stages was selected for the assessment as a
worst-case scenario. |
|
| Boldface indicate an exceedance of the noise criteria of 75dB(A) for
residential uses and 70 dB(A) for temple and library |
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