02.12.2012 Views

Final Report - Asian Development Bank

Final Report - Asian Development Bank

Final Report - Asian Development Bank

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

14<br />

TA 4721-PRC: Preparing the Shaanxi-Qinling Mountains Integrated Ecosystem Management Project<br />

<strong>Final</strong> <strong>Report</strong> Appendix 15<br />

XEPB<br />

EMU<br />

All construction sites Construction IAs<br />

Contractors<br />

Soil erosion and siltation will be minimized by preventive measures<br />

including: (1) sediment trap for the access road to collect and slow runoff,<br />

(2) appropriately engineered storm-water diversions, (3) optimizing work<br />

schedule, especially excavation related work, to minimize the exposure<br />

time and avoid rain season. (4) reduction of slop and appropriate<br />

engineering design in the terrace (5) restoration construction sites with<br />

planting shrubs and grass.<br />

Soil erosion and<br />

siltation<br />

XEPB<br />

EMU<br />

All construction sites Construction IAs<br />

Contractors<br />

About 135t/d sanitary wastewater will be discharged from the work camps<br />

during the construction phase. All wastewater will be collected by mobile<br />

toilets and transferred to the temporary septic tank and treated to national<br />

standards and used for watering forestland. No direct discharge of<br />

untreated wastewater will be made to surface water bodies.<br />

4. Wastewater<br />

Disposal of septic<br />

wastewater<br />

XEPB<br />

EMU<br />

All construction sites Construction IAs<br />

Contractors<br />

It is anticipated that some wastewater, about 0.5 m3/ per washing, will be<br />

produced during the concrete preparation. This type of wastewater usually<br />

contains suspended solids of 5000 mg/L with a pH value about 12. The<br />

wastewater will be treated onsite by sedimentation and neutralization in a<br />

treatment tank. The treated clean water will be reused. Site will be covered<br />

with soil and planted with shrubs and grasses.<br />

Recycle of<br />

construction<br />

wastewater<br />

XEPB<br />

EMU<br />

All construction sites Construction IAs<br />

Contractors<br />

5. Air Quality<br />

Generation of dust Increased dust levels from construction activities will be the major impact<br />

on air quality. The dust emission sources include construction machinery,<br />

rock blasting, foundation excavation, cement mixing and material<br />

transportation. The dust control measures implemented on a case-by-case<br />

basis, such as siting the storage and preparation of construction material<br />

nearby and in a downstream area so that the transportation and impact can<br />

be minimized. Dust from construction traffic will be mitigated by covered<br />

transport truck, road compaction, and water spraying.<br />

6. Noise

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!