1. Wastewater from concrete batch plants (CBP) a. Prior to operation of CBP, construct settling/retention ponds with sufficient specifications/capacity for treatment of wastewater (e.g., from washing of equipment such as mixer drums, trucks and chutes; contact storm water, etc.)b. Properly operate and maintain settling/retention ponds to ensure effluent quality meets applicable QCVN 24:2009/BTNMT (National Technical Regulation for Industrial Wastewater) Part of contractor’s bid cost Contractor MAUR/PMU2, CSC, PMISC Table 10.1: Environmental mitigation plan for the depotEnvironmental Aspect/ Concern Proposed Mitigation Measures Estimated Cost Responsibility Implementation Monitoring2. Air quality impacts due to gaseous and dust emissions a. Strictly implement approved Dust Control Plan;b. Wherever possible, use electrically- powered equipment rather than gas or diesel-powered equipment;c. Position any stationary emission sources (e.g., portable diesel generators compressors, etc.) as far as is practical from sensitive receptors;d. Use only vehicles and equipment that are registered and have necessary permits;e. Burning of wastes generated at the construction sites, work camps and other project-related activities shall be strictly prohibited;f. Construction equipment and vehicles shall be well-maintained and shall meet national QCVN emission standards;g. Specify the use of clean fuels such as ultra-low sulphur diesel in dump trucks and other heavy-duty diesel vehicles and/or equipment, in conjunction with the use of particulate trap control devices, as well as catalytic converters, to avoid excessive diesel emissions.h. Keep stockpiles moist and cover vehicles with tarpaulin sheets or other suitable materials to minimize dust emission and prevent spillage of Part of contractor’s bid cost Contractor MAUR/PMU2, CSC, PMISC Table 10.1: Environmental mitigation plan for the depotEnvironmental Aspect/ Concern Proposed Mitigation Measures Estimated Cost Responsibility Implementation Monitoring materials (e.g., soil, cement, stone, sand, aggregates, excavated soil, construction wastes, etc.).i. Provide temporary covers (e.g., tarpaulins, grass, etc.) on long term materials stockpiles.j. Concrete mixing areas at the Depot site shall be located at least 300 m from the nearest residential area.k. Clean road surfaces of debris/spills from construction equipment and vehicles.l. Install temporary fencing or barriers around particularly dusty activities in vicinity of sensitive receivers;m. Ensure availability of water trucks on site and if the works surface and access roads near sensitive receptors (i.e., residential areas, roadside tea and food stalls and other sensitive receptors) are dry and spray water on the exposed surfaces to reduce dust emission.n. All construction equipment and machinery shall be fitted with emission control equipment in full compliance with the national (QCVN) and local regulations.o. Fuel-efficient and well-maintained haulage trucks will be used to minimize exhaust emissions. Smoke belching vehicles and equipment shall not be allowed and shall be Table 10.1: Environmental mitigation plan for the depotEnvironmental Aspect/ Concern Proposed Mitigation Measures Estimated Cost Responsibility Implementation Monitoring removed from the project.p. Impose speed limits on construction vehicles to minimize road dust in areas where sensitive receptors are located.q. Locations for stockpiling material at the depot area will be at least 100 m from the nearest residential sensitive receivers.r. Undertake immediate repairs of any malfunctioning construction vehicles and equipment.s. Discourage idling of enginest. Provide prior notification to the community on schedule of construction activitiesu. Implement community complaints hotline 3. Noise impacts due to operation of construction equipment/ vehicles and various construction activities a. Strictly implement Noise Control Planb. All construction equipment and vehicles shall be well maintained, regularly inspected for noise emissions, and shall be fitted with appropriate noise suppression equipment consistent with applicable national and local regulations.c. Use only vehicles and equipment that are registered and have necessary permits.d. Avoid noisy construction activities in vicinity of sensitive receivers (e.g., residential areas) during night time Part of contractor’s bid cost Contractor MAUR/PMU2, CSC, PMISC
Table 10.1: Environmental mitigation plan for the depot
Environmental Aspect/ Concern Proposed Mitigation Measures Estimated Cost Responsibility
Implementation Monitoring
Such activities shall be restricted to daylight hours.
e. Truck drivers and equipment operators shall minimize the use of horns.
f. Impose speed limits on construction vehicles to minimize noise emission along areas where sensitive receptors are located (houses, etc.).
g. Provide temporary noise barriers (3-5
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