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

• SO 2. The SO 2 levels (ppm) were recorded at 0.1 ppm at two of the sampling
locations, however at several locations SO 2 was not detected during the dry
season, with no SO 2 detected during the wet season sampling.
• TSP. The approximate concentration level of TSP matter of 10 µm in size -
PM 10) was given between 2.6 – 4.6 and 1.2 – 4.1 µg/m3 for the dry and wet
seasons respectively.
NO 2. The results of the ambient air quality survey are indicative of a relatively
clean air shed with values within the Nigerian Ambient Air Quality Standards,
and international WHO standards for NO 2. This may be reflective of the rural
nature of the environment with little or no existing emissions sources.
Ambient air quality was monitored across ten locations including the Orior-
Osemwende, Ihovbor-Evboeka and Idunmwowina-Urho-Nisen communities.
In addition, a control site was selected 1 km from the Project site. The results
demonstrated that the NO 2 levels did not go above 0.02 ppm across both the
wet and dry seasons.
4.8 AMBIENT NOISE ENVIRONMENT
The site is directly accessed via a tarred road connecting the Project site to the
Benin City Bypass, a major expressway approximately 3 km to the east of the
Site. Surrounding communities engage in informal trading, slash and burn
agriculture and some employment in the formal sector. It is anticipated that the
main underlying sources of noise will be road traffic and farming activities and
short-term construction noise from the neighbouring NIPP.
The measurement of ambient noise levels were recorded using an Extech
Integrating Sound Level Meter (model number 407780). A total of eight
sampling locations were selected during the dry season including a sampling
location in close vicinity to the Ihovbor-Evboeka community. A total of ten
sampling locations were chosen during the wet season including the
transmission line corridor, and the Orior-Osemwende and Ihovbor-Evboeka
communities. The results of the noise sampling are illustrated in Table 4.6.
Table 4.6
Noise Data - Wet and Dry Season
Sample Code
Noise Level - dB (A)
Wet Season
Dry Season
A1 53.8 49.9
A2 50.4 53.7
A3 51.3 51.2
A4 49.6 58.5
A5 45.0 47.0
A6 46.0 54.5
AZURA EDO IPP
4-22
DRAFT EIA REPORT