Construction Phase Air Quality. Potential construction phase air quality impacts pertinent to the Designated Project would include dust nuisance and gaseous emissions from the construction plants and vehicles. Fugitive dust emissions arising from minor earthworks for the removal of existing slope surface material, drilling operations and wind erosion would be the main sources of air pollution. Given that the number of plants to be used on site would be limited and the works area would be small, adverse dust impacts during construction would not be anticipated with the incorporation of mitigation measures stipulated in the Air Pollution Control (Construction Dust) Regulation. Vehicle and plant exhause emissions from the site would not be considered to constitute a significant source of air pollution. Noise According to the construction programme of this Designated Project, the site works are scheduled for commencement in March 2008 with a duration of 7 months. No construction activities would be anticipated to be carried out at the Designated Project during the restricted hours (between the hours of 7 p.m. and 7 a.m., or at any time on a general holiday) under the Noise Control Ordinance. Apart from the Xxx Sin Leng Country Park, there was no NSR identified within the assessment area. Visitors to the country park would potentially be impacted by the proposed construction works at the Designated Project. However, the EIAO-TM does not specify a limit for construction noise levels received at a country park. Taking into account the transient nature of visitors to the country park, insurmountable construction noise impact on this NSR would not be anticipated. Water Quality Water-bodies potentially affected by the proposed slope works include drainage culverts to the immediate northern and southern end of the works area of the Designated Project (Figure 2 refers). Site runoff and drainage from the works area of the Designated Project, if uncontrolled, could enter the drainage culverts. The Designated Project is located inside the Water Gathering Ground demarcated by WSD and therefore the “Conditions for Working within Water Gathering Grounds”, issued by WSD, should be strictly followed for the slope works (see Section 5 of this report). During the construction phase, runoff and drainage from construction site would be the main sources of potential water quality impacts to the nearby water-bodies. Site runoff and drainage may contain increased loads of suspended solids and contaminants. Potenti...
Construction Phase Air Quality. The construction phase air qua lity impact assessment indicates that dust generating activities and gaseous emissions from construction plant for the Proposed Beach Development may potentially cause air quality impacts to adjacent Air Sensitive Receivers (ASRs). The construction of the Proposed Beach Development involves site formation, localised widening of Xxxx Xxx Road, building works, construction of gabion, groynes and culverts and sand filling for the beach. Excavation, dredging, filling, truck movements, materials handling and wind erosion of open stockpiles of dusty materials have been identified to be the key dust generating activities. In view of the small scale of the Proposed Beach Development and the small size of the worksite, no adverse fugitive dust impact is envisaged with the implementation of dust control measures and adoption of good site practices. Potential air quality impacts associated with gaseous emissions of diesel-powered construction vehicles and equipment are expected to be relatively small as only a small number of diesel construction vehicles and plant will be operated in the limited works areas at any one time. The requirement for all construction plant to use ultra-low- sulphur diesel (ULSD) will further reduce the potential air quality impacts. The potential cumulative dust impacts from the contemporary occurrence of the Tolo Harbour Sewerage of Unsewered Areas Stage I Phase IIC project (Tolo Harbour Sewerage Improvement) works have been assessed, the cumulative dust impacts will expect to be minor. To ensure compliance with the relevant dust criterion at the ASRs and implementation of appropriate control measures during the construction phase, a programme for dust monitoring and site audit has also been recommended.
Construction Phase Air Quality
