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

Table 9.1
Summary of cumulative impacts due to Azura Edo IPP and NIPP emissions
Pollutant
Averaging
Period
Source
Criterion
µg/m 3
Max. Impact
µg/m 3
NO 2
Annual mean EU/WHO 40 0.438
1 hour mean EU/WHO 200 60.9
1 hour mean Nigeria 75-113 60.9
The cumulative emission is only marginally higher than that of the Azura Edo
IPP alone and none of the predicted levels exceeded the criteria. The 1 hour
average predicted emissions of NO 2 from both the Azura Edo IPP and NIPP
are such that no air quality standard is exceeded or approached.
The predicted dispersion pattern also shows that the peak impact occurs over
a very small area primarily due to directional wind conditions. On this basis,
the 25 percent threshold for protection of the airshed for future development
is less significant than would be the case where the peak impacts are across a
larger area.
The cumulative impacts on air quality are therefore considered to be of
insignificant negative significance as a result of emissions of NO 2.
9.2 NOISE
The proposed Azura Edo IPP plant is located adjacent to the NIPP plant,
which is currently under construction. As such, an assessment of the
cumulative noise impacts is required to understand the impacts related to the
operation of both of these plants in close proximity. There are no other known
developments in the area which could contribute significantly to the noise
levels.
The EIA produced for the neighbouring NIPP plant states:
“The Project operational phase Noise is not expected to be significant on the
receptions in the vicinity of the site. The communities that are nearest
receptions live not less than 1km from the power plant. Although the project
operational noise will not affect them, the plant will be designed so that
ambient noise at the perimeter fence will not exceed FMEnv standard, for
power plant of 93dB(A) at 1m distance. Operational noise will not be audible
at the nearest receptor. The noise impact of the communities will be
insignificant. (p.148)”
AZURA EDO IPP
9-4
DRAFT EIA REPORT