chapter - 1 introduction - Meghalaya State Pollution Control Board

Hills Cement Co. Limited.
The noise generation will be reduced at source by erecting noise dampening
enclosures, by maintaining the machines and greasing them regularly. The
vehicles are and will be equipped with silencers. The equipments shall be
provided with acoustic shields or enclosures to limit the sound level inside the
plant, the existing equipment already have these provisions. The secondary
protective measures will be adopted at receptor points to reduce negative
impact due to high noise levels. All the workers engaged at and around high
noise generating sources are and shall be provided with ear protection
devices like ear mufflers/plugs. Their place of attending the work will be
changed regularly so as to reduce their exposure duration to high levels.
They will be regularly subjected to medical check-up for detecting any
adverse impact on the ears. The existing and proposed green belt will also
help to prevent noise generated within the plant from spreading beyond the
plant boundary in its own limited way.
The following measures will be taken up to keep the noise levels with in
permissible limits. a) Provision and maintenance of thick green belt to screen
noise) Proper maintenance of noise generating machinery including
Transportation vehicles) Provision of air silencers to modulate the noise
generated by the machines/equipments) Reducing the exposure time of
workers to the higher noise levels by rotation) Proper encasement of noise
generating sources will be done to control noise level. Besides, ear
muffs/plugs will be provided to the workers in the close vicinity of noise
source) Provision will be made for special vibration dampers and monitoring
to prevent propagation of vibration to surrounding areas. All workers working
in noise borne area will be regularly subjected to medical check-up for
detecting any adverse impact on their TLV of hearing.
The above control measures have already been adopted in existing
machinery/plant, which are very successful as is clear from the monitoring
results.
5.6 WATER POLLUTION
Mitigation measures
The plant is designed for closed re-circulation cooling water system. The
discharge of wastewater from other sources as DM water plant, boilers blow
down will not be significant and can be re-used for dust suppression and in
plant gardening etc.
Pollution Control Consultants (India) Pvt. Ltd. 99