| Annex B-6 - Operational
Noise Assessment |
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| NSR: |
Village House at Sha Po Kong |
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Distance from NSR to Source |
1100 |
m |
to the nearest site
boundary |
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| Emission Group No. |
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No. of plant |
SPL at 1m |
Correction, dB(A) |
SPL at NSR |
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dB(A) |
No. of Plant |
Distance(1) |
Barrier(2) |
Facade |
dB(A) |
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| ABSORBER ISLAND |
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| 1 |
Booster fans |
4 |
85 |
6.0 |
-60.8 |
-10 |
3 |
23 |
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Gas-Gas heater |
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| 2 |
Oxidation air compressors |
4 |
90 |
6.0 |
-60.8 |
-10 |
3 |
28 |
659.6 |
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| 3 |
Absorber vessel |
4 |
85 |
6.0 |
-60.8 |
-10 |
3 |
23 |
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Recycle pumps |
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Absorber bleed pumps |
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Makeup water transfer
pump |
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Absorber drain tank transfer
pumps |
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Absorber island sump pumps |
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Absorber island sump agitators |
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| LIMESTONE PREPARATION ISLAND |
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| 4 |
Limestone ball mill |
1 |
90 |
0.0 |
-60.8 |
-10 |
3 |
22 |
164.9 |
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| 5 |
Reagent slurry feed pumps |
1 |
85 |
0.0 |
-60.8 |
-10 |
3 |
17 |
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Limestone prep sump pumps |
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Limestone prep sump agitators |
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| GYPSUM DEWATERING ISLAND |
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| 6 |
Hydrocyclone overflow return
pumps |
1 |
85 |
0.0 |
-60.8 |
-10 |
3 |
17 |
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Secondary hydracyclone feed
tank pumps |
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Chloride purge transfer pumps |
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Reclaim water pumps |
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Gypsum dewatering island sump
pumps |
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Instrument & Service Air
Compressors |
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Belt filters |
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| WASTEWATER TREATMENT FACILITY |
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| 7 |
Mixers |
1 |
85 |
0.0 |
-60.8 |
-10 |
3 |
17 |
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Centrifugal pumps |
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Progressive cavity pumps |
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Aeration blowers |
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Chemical dosing pumps |
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Clarifier sludge recycle pumps |
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| MATERIAL HANDLING |
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| 8 |
Limestione silos- full time
opeation |
1 |
85 |
0.0 |
-60.8 |
-10 |
3 |
17 |
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Conveyors |
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Two dust collection systems |
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Bin discharge vibrators |
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Electro-magnet |
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| GYPSUM TRANSFER |
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| 9 |
Conveyors |
1 |
85 |
0.0 |
-60.8 |
0 |
3 |
27 |
521.5 |
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| LIMESTONE
TRANSFER |
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| 10 |
Conveyors |
1 |
85 |
0 |
-61 |
0 |
3 |
27 |
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Dust collector |
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Electro-magnet |
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Barge unloader |
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| GYPSUM TRANSFER TO BARGE
LOADER |
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| 11 |
Conveyor |
1 |
85 |
0.0 |
-60.8 |
0 |
3 |
27 |
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Electro magnet |
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Barge loader |
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TOTAL SPL at NSR, dB(A)
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35 |
3014.6 |
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| Note: |
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| (1) A negative
correction factor of 10dB(A) has been applied in the assessment due to no
direct line of sight. |
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| (1)
Given the considerable distance between the noise sources and the NSR, the
distance correction has been considered as attenuation due to spherical |
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| wave
propagation. |
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| (2)
With the equipment will be
screened by the existing building structures at Castle Peak Power Station and
topography, a negative correction factor |
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| of
10dB(A) has been applied in the assessment. |
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| (3)
The SCR reactors do not have machinery / equipment that are major noise
sources and the location of the SCR reactors will be largely shielded by
the |
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| boiler house
structure. The SCR reactors are
therefore not required to be included in the EIA noise assessment. |
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| NSR: |
Planned Holiday Camp |
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Distance from NSR to Source |
1200 |
m |
to the nearest site
boundary |
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| Emission Group No. |
|
No. of plant |
SPL at 1m |
Correction, dB(A) |
SPL at NSR |
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|
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| |
dB(A) |
No. of Plant |
Distance(1) |
Barrier(2) |
Facade |
dB(A) |
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|
| ABSORBER
ISLAND |
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|
|
|
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|
|
|
|
| 1 |
Booster fans |
4 |
85 |
6.0 |
-61.6 |
-10 |
3 |
22 |
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| |
Gas-Gas heater |
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| 2 |
Oxidation air compressors |
4 |
90 |
6.0 |
-61.6 |
-10 |
3 |
27 |
554.2 |
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| 3 |
Absorber vessel |
4 |
85 |
6.0 |
-61.6 |
-10 |
3 |
22 |
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| |
Recycle pumps |
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| |
Absorber bleed pumps |
|
|
| |
Makeup water transfer pump |
|
|
| |
Absorber drain tank transfer
pumps |
|
|
| |
Absorber island sump pumps |
|
|
| |
Absorber island sump agitators |
|
|
| LIMESTONE
PREPARATION ISLAND |
|
|
|
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|
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| 4 |
Limestone ball mill |
1 |
90 |
0.0 |
-61.6 |
-10 |
3 |
21 |
138.6 |
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| 5 |
Reagent slurry feed pumps |
1 |
85 |
0.0 |
-61.6 |
-10 |
3 |
16 |
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| |
Limestone prep sump pumps |
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|
| |
Limestone prep sump agitators |
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| GYPSUM
DEWATERING ISLAND |
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| 6 |
Hydrocyclone overflow return
pumps |
1 |
85 |
0.0 |
-61.6 |
-10 |
3 |
16 |
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| |
Secondary hydracyclone feed
tank pumps |
|
|
| |
Chloride purge transfer pumps |
|
|
| |
Reclaim water pumps |
|
|
| |
Gypsum dewatering island sump
pumps |
|
|
| |
Instrument & Service Air
Compressors |
|
|
| |
Belt filters |
|
|
| WASTEWATER
TREATMENT FACILITY |
|
|
|
|
|
|
|
|
|
|
| 7 |
Mixers |
1 |
85 |
0.0 |
-61.6 |
-10 |
3 |
16 |
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|
|
| |
Centrifugal pumps |
|
|
| |
Progressive cavity pumps |
|
|
| |
Aeration blowers |
|
|
| |
Chemical dosing pumps |
|
|
| |
Clarifier sludge recycle pumps |
|
|
| MATERIAL
HANDLING |
|
|
|
|
|
|
|
|
|
|
| 8 |
Limestione silos- full time
opeation |
1 |
85 |
0.0 |
-61.6 |
-10 |
3 |
16 |
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|
| |
Conveyors |
|
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| |
Two dust collection systems |
|
|
| |
Bin discharge vibrators |
|
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| |
Electro-magnet |
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| GYPSUM
TRASFER |
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| 9 |
Conveyors |
1 |
85 |
0.0 |
-61.6 |
-10 |
3 |
16 |
43.8 |
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| LIMESTONE TRANSFER |
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| 10 |
Conveyors |
1 |
85 |
0 |
-62 |
-10 |
3 |
16 |
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Dust collector |
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Electro-magnet |
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Barge unloader |
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| GYPSUM
TRASFER TO BARGE LOADER |
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| 11 |
Conveyor |
1 |
85 |
0.0 |
-61.6 |
-10 |
3 |
16 |
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Electro magnet |
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Barge loader |
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| |
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|
TOTAL SPL at NSR, dB(A)
= |
31 |
1350.0 |
|
|
|
|
| Note: |
|
|
|
|
| (1) A negative
correction factor of 10dB(A) has been applied in the assessment due to no
direct line of sight. |
|
|
|
|
| (1)
Given the considerable distance between the noise sources and the NSR, the
distance correction has been considered as attenuation due to spherical |
|
|
|
| wave
propagation. |
|
|
|
|
| (2)
With the equipment will be
screened by the existing building structures at Castle Peak Power Station and
topography, a negative correction factor |
|
|
|
|
|
| of
10dB(A) has been applied in the assessment. |
|
|
|
|
| (3)
The SCR reactors do not have machinery / equipment that are major noise
sources and the location of the SCR reactors will be largely shielded by
the |
|
|
|
| boiler house
structure. The SCR reactors are
therefore not required to be included in the EIA noise assessment. |
|
|
|
|
|
|
|
|
|
|
|
|
|
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