chapter - 1 introduction - Meghalaya State Pollution Control Board

Hills Cement Co. Limited.
TABLE 5.2
NOISE POLLUTION LEVEL OF THE EQUIPMENTS
Equipments Noise Level in dB (A)
Mills 86 - 100
Forced draft fan 85 - 100
Induced draft fan 76 - 97
Compressors 82 - 105
Turbo generator 90
Mitigation measures
In general, the following measures will be adopted for noise pollution
control:
• Technical Measures
• Administrative measures
• Personnel protection Measures
In Thermal Power Plant, the noise sources are mostly high pressure Pumps,
Turbines and leaking Steam pipelines.
The following technical measures will be taken to reduce noise:
• Checking leakages in High Pressure Pipelines and plugging them, as
required.
• Providing enclosures / barriers for turbines high-pressure pumps.
• Proving silencers at inlet / outlet of the Fans.
• Regular checking of vibration level due to high speed machines and
taking necessary step to mitigate the same.
In the Boiler Plant there are various noise producing areas such as High
Pressure pipelines where technical measures will not be practically effective.
In such cases, the following administrative measures are proposed:
• Workers will be put on rotational duties.
• Regular medical check up for all workers.
Besides above, the workers exposed to high noise will be provided with
personnel protective devices such as earplugs and earmuffs.
Pollution Control Consultants (India) Pvt. Ltd. 98