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

7.3.9 Impact Description and Significance: Summary
Table 7.12 provides a summary of the key impacts to air quality associated
with the construction, operation and decommissioning of the proposed power
plant.
Table 7.12
Summary of Impact Significance Pre-mitigation
Impact Source Significance
Construction
Dust
Site traffic associated with
construction, worse in dry
seasons
Major negative
PM 10 and NO 2 / NO x
Site Vehicle Emissions and
vehicles accessing site
Insignificant Negative
Operation
NO 2 Burning of natural gas Minor Negative
CO Burning of natural gas Insignificant Negative
Greenhouse gases
Emissions of greenhouse gases
during operations
Significant Negative
Decommissioning
Dust
PM 10 and NO 2
Site traffic associated with
decommissioning, worse in
dry seasons
Site Vehicle Emissions and
vehicles accessing site
Major Negative
Insignificant Negative
7.4 NOISE
7.4.1 Impact Assessment Methodology
Nigeria Interim Guidelines and Standards for Noise
The Federal Environmental Protection Agency Decree 1988 Interim Guidelines
and Standards for Industrial Effluent, Gaseous Emissions and Noise Limitation
(Government Notice 1991) provides guidelines and standards to ensure
industrial activities are compatible with a clean and safe environment in
Nigeria. Chapter 4 of the Guidelines present noise exposure limits for Nigeria.
These limits relate to occupational noise exposure and set out limits protect
workers from noise induced hearing loss. The limits for daily noise exposure
for workers should not exceed an equivalent noise level of 90 dB over an 8-
hour working period. This standard is, however, applicable for occupational
noise exposure only, and is not suitable as criteria for assessing the
significance of environmental noise impacts to receptors outside the project
AZURA EDO IPP
7-29
DRAFT EIA REPORT