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Azura-Edo Independent Power Plant Environmental Impact ... - IFC

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Ref<br />

#<br />

Potential<br />

impact<br />

contaminatio<br />

n from<br />

borehole<br />

construction,<br />

accidental<br />

spills and<br />

increased<br />

erosion<br />

• Water use<br />

2.5 Biodiversity<br />

<strong>Impact</strong>s related<br />

to:<br />

• Clearing of<br />

vegetation<br />

and habitat,<br />

• disturbance<br />

of fauna due<br />

Desired<br />

Outcome<br />

resources<br />

Minimise<br />

habitat loss,<br />

potential<br />

soil/ water<br />

contaminatio<br />

n and<br />

disturbance<br />

of fauna<br />

Description of mitigation<br />

appropriate methods such as effective site drainage, and<br />

sediment/silt trapping mechanism.<br />

• Use cut-off drains to divert surface runoff from exposed<br />

soils or construction areas;<br />

• Install oil/water separators and silt traps before effluent<br />

leaves the site;<br />

• Design permanent drainage installations for heavy rainfall<br />

events and protect stormwater channels using slope<br />

limitation techniques, rip-rap and lining;<br />

• Store hydrocarbons, fuels, lubricants and chemicals in<br />

bunded and lockable oil storage containers, with hoses and<br />

gauges kept within the bund.<br />

• Regular checking and maintenance of all plant and<br />

machinery to minimise the risk of fuel or lubricant<br />

leakages;<br />

• Remove all water accumulation within bunds using<br />

manually controlled positive lift pumps not gravity drains;<br />

• Training of relevant staff in safe storage and handling<br />

practices, and rapid spill response and cleanup techniques;<br />

• Minimise stockpiling, 10 m buffer zone between drainage<br />

channels and stockpiles (leaving existing vegetation in<br />

place and shield stockpiles using geotextiles if necessary;<br />

• Minimise vegetation clearing and re-vegetate bare soil<br />

before the wet season;<br />

• Adequate sewage collection and treatment of sewage on<br />

site;<br />

• Adequate collection and disposal of sludge on site;<br />

• Line all areas for concrete mixing; and<br />

• Separate all waste on site and locate waste storage areas on<br />

hardstanding (or bunded).<br />

• Limit vegetation clearing to what is absolutely necessary;<br />

• Cleared areas not required for buildings, facilities or<br />

infrastructure should be revegetated or covered with<br />

hardstanding;<br />

• Clearly demarcate work areas to limit disturbance;<br />

• Mark and protect any Threatened floral species on site;<br />

• Development of a BMP enlisting the services of an<br />

entymologist and botanist. This will include demarcation<br />

Performance<br />

Indicator<br />

Nigerian,<br />

WHO and<br />

World Bank<br />

requirements<br />

Hectares of<br />

rehabilitated<br />

land<br />

Implementati<br />

on of<br />

measure<br />

Monitoring<br />

effluent<br />

leaves the<br />

site<br />

Visual<br />

inspection<br />

and<br />

photographic<br />

record<br />

Timing/<br />

Frequency<br />

After<br />

constructi<br />

on<br />

Daily<br />

Responsibility Estimated<br />

Cost (USD)<br />

HSE<br />

Coordinator,<br />

<strong>Azura</strong> <strong>Power</strong><br />

liquid<br />

effluent and<br />

receiving<br />

water bodies<br />

(approx 1,000<br />

USD for setup<br />

and 5,000<br />

USD for each<br />

monitoring<br />

event)<br />

Part of HSE<br />

Coordinator’<br />

s duties

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