Wastewater Management
The following mitigation measures are presented for minimizing impact from wastewater handling and disposal;
- Construction equipment and vehicle washing to be carried out at designed areas provided with wash water collection systems. Alternatively, equipment and vehicle washing may be carried out at off-site locations (such as central workshops of contracting companies), where adequate facilities are available. The wash water collection system will typically include settling tanks for separation of suspended solids and oil& grease. The floating oil& grease is to be removed using skimmers or soaking pads and collected in drums. The water after settling is to be routed to Sewage treatment plant (STP) for treatment.
- Sewage generated on-site to be collected through underground pipes into holding tanks, from where the sewage will be routed to onsite sewage treatment plant or alternatively transport periodically by vacuum trucks and transferred to an approved sewage treatment plant to the site for treatment and disposal;
- The hydro test water need to be collected in the lined pond and the water to be tested for any contaminants. If the collected hydrotest water is found not to be contaminated, and further if the water quality conforms to land discharge standards, then the water can be discharged on to the land in small quantities. The discharge will be done in a way as to avoid drainage from large areas. However, if the water is found contaminated then it is to be evaporated in the pond, else it is to be treated in the wastewater treatment plant after the plant is operational.
- Accidental spillages of hazardous substances to be immediately remediated to prevent contaminated runoffs and potential contamination of soil and groundwater;
- Waste consignment notes to be prepared and documented for transportation of wastewater (sanitary and other wastewater), if any, to offsite treatment facilities.
Soil, spill containment and clean-up
- Spillage of any harmful substance shall be immediately reported to TTCL and owner representative in charge. Where the potential for spill is evident, the appropriate spill kit shall be provide and readily for use. The necessary training should be provided to ERT.
- All chemical substance that can leach out, as well as all liquid, shall be stored in such a way that any leaks shall not cause a risk of soil contamination (e.g. placement in a vat, double tanks, etc.).
- The used of any fueling device which may be locked open for hands free operation is prohibited. All fueling devices shall be carrying out with 100% hand control.
- If leak causes soil contamination, it shall be cleaned up immediately. The clean up costs (namely, carry out of analysis, soil drillings and the clean up operation itself) shall be paid for by the polluter. (PPP; Polluter Pay Principle).
- The moving of soil or modifying the level of the grounds is only permitted after written confirmation from owner representative in charge.
- The storage of chemical is not allowed on the site. The sole exception on this rule is made when the products are needed for executing activities. At the working point, a storage of max 24 hours is permitted given they are stored on a safe (e.g. fire, explosion, pollution etc.) and environmentally aware way (see soil). When the storage of big quantities imposes itself, this shall be discussed with and put down in writing by owner representative and TTCL person in charge and Environment Consultant Service Company.
Traffic Management Plan
The main aim of traffic management plan is to assist TTCL and subcontractor employees in complying with all applicable traffic and transportation requirements during construction state. Furthermore the propose of this plan is to provide the framework for movement of equipment, workers and local community to/from the project site.
- The employees including the drivers are to be trained on the driving requirement to be followed for the project;
- The movements of heavy vehicles and equipment are to be planned in such a way such as to avoid peak hours on main roads in order to minimize traffic congestion;
- Training on defensive driving are to be provided for drivers. The drivers are also to be trained on emergency response measures and requirements;
- Approved transporters are to be used for transportation of hazardous materials and heavy equipment/goods.
4.3 PROJECT SITE SECURITY
TTCL shall arrange appropriate security system and develop site security plan for the project and lay down area.