Environmental Assessment
Volume B-3.5
Mine
Noise
Ambatovy Project
69
January 2006
Table 3.5-3 Predicted Noise Levels-Mine Site
Location
Sound Level
[dBA]
Behontsa
31
Berano
42
Sahamalotra
31
Predicted noise levels are also presented as a noise map in Figure 3.5-2.
3.5.4.7 Residual Impact Analysis
The basis for the analysis of noise impacts is both a comparison of predicted
noise levels to World Bank criteria and a determination of the amount of change
in baseline noise levels. Table 3.5-4 compares the predicted noise levels to the
World Bank criteria. Table 3.5-5 provides and analysis of the amount of change
in baseline noise levels.
Table 3.5-4 Comparison of Predicted Noise Levels with World Bank Criteria, Mine
Site
World Bank Criteria [dBA]
Location
Sound Level
[dBA]
Day
Night
Meets Criteria
Behontsa
31
55
45
yes
Berano
42
55
45
yes
Sahamalotra
31
55
45
yes
Table 3.5-5 Expected Change in Baseline Noise Levels, Mine Site
Location
Period
Period L
eq
[dBA]
Predicted
Project Noise
Level [dBA]
Combined
Noise Level
[dBA]
Amount of
change
[dBA]
day
42
31
42
0
Behontsa
night
34
31
36
+2
day
41
42
45
+4
Berano
night
40
42
44
+4
day
41
31
41
0
Sahamalotra
night
40
31
40
0
