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

Air quality measurements were taken using handheld instruments (Multi Gas
Detector and Handheld Aerosol Monitoring) and the following parameters
were measured: CO, carbon dioxide (CO 2), sulphur dioxide (SO 2), Volatile
Organic Compounds (VOC), H 2S, ammonia (NH 3) and Total Suspended
Particulates (TSP). The results of the ambient air quality measurements are
presented in Table 4.3 and Table 4.4 below.
Table 4.3
Dry season air quality results
Sample
Code
VOC CO 2 CO SO 2 H 2S TSP
ppm mg/m 3
A1 0.2 580 1.0 ND ND 0.088
A2 0.2 630 1.0 ND ND 0.091
A3 0.2 550 1.0 ND ND 0.078
A4 0.1 520 2.0 0.1 ND 0.073
A5 0.1 530 1.0 ND ND 0.065
A6 0.4 590 1.0 ND ND 0.058
A7 0.5 630 ND 0.1 ND 0.051
A8 0.7 660 2.0 ND ND 0.057
FMEnv NS NS 10 0.1 NS 0.25
Limits
Source: EnvAccord Fieldwork, 2011 NS= Not Specified ND= Not Detected
Table 4.4
Wet season air quality results
VOC CO 2 CO SO 2 H 2S NH 3 TSP
Sample
Code
ppm mg/m 3
A1 ND 470 3.0 ND 1.0 ND 0.036
A2 ND 660 2.0 ND ND ND 0.046
A3 ND 860 1.0 ND ND ND 0.038
A4 ND 730 ND ND ND ND 0.046
A5 0.1 470 1.0 ND ND ND 0.025
A6 ND 560 1.0 ND ND ND 0.079
A7 ND 510 1.0 ND ND ND 0.028
A8 0.1 430 2.0 ND ND ND 0.023
A9 0.1 520 3.0 ND 1.0 ND 0.040
A10 ND 510 ND ND ND ND 0.082
FMEnv NS NS 10 0.1 NS 0.25
Limits
Source: EnvAccord Fieldwork, 2011 NS= Not Specified ND= Not Detected
Results of the concentration levels of nitrogen dioxide (NO 2) were taken from
the ambient air quality study conducted for the neighbouring NIPP, during
both the wet season (7 – 12 August 2006). The air sampling was done at two
hour intervals at each sample location for ten hours in the morning, afternoon
and evening periods. A Toxi Rae Single Gas Monitor was used to take the
AZURA EDO IPP
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