HULHULE-MALE’ BRIDGE PROJECT

EIA for the proposed Hulhule-Male’ Bridge Project
NO, NO 2 , VOC and NO 3 . This background value of O 3 in the prediction refers to the WHO
criterion, and thereby, works out to the air quality standard of 100-120 μg/m 3 of O 3 , which is
mainly based on the highest concentration limit for 8 consecutive hours.
6.6.2.3 Evaluation standard
The air impact evaluation of this project adopts the standard in Air quality guidelines-global
update 2005 set by World Health Organization, in which the impact of CO on human health is
mainly based on acute effect, hence quality standard of CO follows the limit at 15 min,30
min,1 h and 8 h, namely 100 mg/m 3 ,60 mg/m 3 ,30 mg/m 3 and 10 mg/m 3 respectively. In
contrast to the minimum time scale of hours in long-term conprehensive file output by ADMS-
EIA, the maximum landing concentration of CO at regional grid point will follow the standard of
maximum landing concentration per hour. NO 2 adopts annual average concentration of 40 μg/m 3
provided by WHO, and hourly average concentration is 200μg/m 3 .
6.6.2.4 Prediction and evaluation on impact
(1) Analysis on predicted concentration of regional grid
Table 6.9 provides the maximun landing concentration at the regional grid point.
Table 6.9 Maximum landing concentration at the regional grid point
Road
Crosssea
bridge
Evaluation
factors
NO 2
CO
Concentration
types
Average
concentration
Hourly
concentration
Hourly
concentration
Maximum
value
Quality
standard
10.194 40
45.602 200
Unit
μg/m 3
Up to
standard
or not
Up to
standard
Up to
standard
0.188 30 mg/m 3 Up to
standard
Maximum
accounting for
standard rate
25.49%
22.80%
0.63%
According to the caculation results, the maximum hourly concentration of NO 2 is at 18:00,
October 26, 2014, and the maximum hourly concentration of CO is at 5:00, on February 19,
2014. According to the prediction results of grid points, the maximum landing concentration
emission of both NO 2 and CO discharged from vehicle exhaust on all the roads can meet the
standard limit in Air quality guidelines-global update 2005 provided by WHO. Figure 6.15,
Figure 6.16 and Figure 6.17 illustrates the distribution diagram of predicted annual average
concentration of NO 2 , predicted hourly average concentration of NO 2 and predicted hourly
average concentration of CO at regional grid points.
Prepared by: CDE Consulting & China Shipping Environment Technology
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