(d) Before beginning works the contractor should be submitted licenses for all borrow materials use for project.The construction of the Subproject will use existing borrow pits or quarries located near the Site. However, in case that new borrow pits and quarries, owned by the Contractor, are needed the Contractor shall carry out the following activities:■ Locations of stockpiles, quarries and borrow pits shall be identified and demarcated, ensuring that they are far away from critical areas such as steep slopes, erosion prone soils, cultivated lands, and areas that drain directly into water bodies. Locations of stockpiles, quarries and borrow pits shall be in nonproductive land to the maximum extent possible and be approved at least by the Department of Natural Resources and Environment (herein referred to as "DONRE");■ Location of stockpiles, quarries and borrow pits shall avoid sensitive areas such as nature reserves, scenic spots, forest parks, water source protection areas, etc;■ An open ditch shall be built around the stockpile site to intercept wastewater;■ Limit extraction of material to approved and demarcated quarries and borrow pits;■ Stockpile topsoil when first opening the borrow pit. After all usable borrow has been removed, tile previously stockpiled topsoil should be spread back over the borrow area and graded to a smooth, uniform surface, sloped to drain. On steep slopes, benches or terraces may have to be specified to help conữol erosion;■ Excess overburden should be stabilized and re-vegetated. Where appropriate, organic debris and overburden should be spread over the disturbed site to promote re-vegetation. Natural re-vegetation is preferred to the extent practicable;
■ Existing drainage channels in areas affected by the operation should be kept free of overburden;
■ Prior to the initiation of construction, the materials stockpiles shall be constructed with peripheral storm water drains and interception ditches to divert storm water into rivers downstream, in order to avoid direct erosive impact from storm water. If necessary, sedimentation ponds will also be constructed to remove sands and other solids in storm water before it reaches the rivers downstream.
■ The Contractor shall ensure that all borrow pits used are left in a trim and tidy condition with stable side slopes, re-establishment of vegetation, restoration of natural water courses, avoidance of flooding of the excavated areas wherever possible so no stagnant water bodies are created which could breed mosquitoes;
■ When the borrow pits cannot be refilled or reasonably drained, the Contractor shall consult with the local community to determine their preference for reuse such as fish farming or other community purposes;
■ No foreign material generated/ deposited during construction shall remain on site;
■ Areas affected by stockpiling shall be reinstated to the satisfaction of the SES and the Environment Officer (EO) of the PMU.
(e) Contractors shall restore temporary concrete batching and asphalt plant sites to their original condition on completion of Project works. This shall include the clean-up of spillage and debris before leaving temporary construction sites, spillage and debris shall be disposed of according to section 2.4.1.
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