ENVIRONMENT HEALTH AND SAFETY (EHS) The effective anticipation and avoidance, minimization, or compensation/offsets of environmental risks and impacts in hydropower development depend on a number of key aspects:
- Land sliding
- Electrical hazards
- Heavy rainfall
- Falling hazards
- Equipment related emergencies
Landslide: It may occur due to wind and rainfall which may stall the traffic in the site and needs to be cleared immediately.
Suffocation: It may occur inside the tunnel due to its deep structure. Electrical hazards: these may occur due to miss-handling of equipment’s
Earthquake: The area is prone to earthquakes as it falls in (zone 5) which can interrupt working and can cause damage to the property and life.
Floods: these may arise due to heavy rainfalls.
Falling Hazards: the work involves the working of laborers at height. Therefore there is always a risk of falling.
Equipment-related emergencies: The emergencies may also arise due to the failure of the equipment.
Prevention and precautions at emergency situations:
- Land sliding:
• The protection and safety kit should be used in such areas.
• Safety kit consists of a reflecting jacket, helmets, and gam boots.
• Working should be stopped in bad weather conditions.
NOTE: if oxygen content exceeds 21.5%, then fire hazards will increase.
- Electrical hazards:
• Proper guidance should be given to workmen to operate machines.• Main supply should be cut down in the case of electrical mishappening.
• Regular maintenance should be given to machines.
• To prevent the whole project from being damaged again, retaining walls are provided at the powerhouse.
• One should switch off the main supply of power in case of floods.
- Heavy rainfall:
• Machinery should be covered with sheds.
• Checking of machines should be done before its operation.
- Falling hazards:
• Safety belts should be used along with ropes.
• Workers should be made aware of it and its possibilities.
- Equipment related emergencies:
• Regular maintenance should be done.
• The equipment should be used in accordance with their permissible limits.
- Electrical fire:
• Fire extinguishers should be used.
• Electrical appliances should be handled with care.
➢ Fire extinguisher
➢ Sand bucket
➢ Face shield
➢ Nose mask
➢ Hand gloves
➢ Earplugs/ ear muffs
➢ Safety belts
Types of fires:
There are 4 types of fires namely Type A, Type B, Type C, Type D.
- Type A: When solids such as sand, leaves, etc. catch fire, it is categorized as type A fire. This type of fire can be resolved by using water.
- Type B: When liquids such as gasoline catch fire, it is categorized as type B fire. This type of fire can be resolved by using a fire extinguisher of type B.
- Type C: When gases catch fire, it is categorized as type C fire. This type of fire can be resolved by using a fire extinguisher of type C.
- Type D: When a fire erupts due to electrical faults, it is categorized as a type D fire. This type of fire can be resolved by switching off the main supply.
Types of fire extinguishers:
i. Type A: It is a dry chemical powder fire extinguisher.
ii. Type B: It is a foam fire extinguisher.
iii. Type C: It is a carbon monoxide fire extinguisher.