4.6 Summary of environmental impacts of CETP operation Impacts Assessment Sources Description Negative Positive term Dredging Odor emitted from collection and Sludge will be generated from CETP, which could affect transport of septage directly to life enjoyment of people along the haulage route. and transport However, this impact is easily mitigated. Micro-organism dispersion when M of septage the truck is not covered properly. Air pollution due to transportation L means: dust, SO2, CO2, CO, NOx Surface water Treated water discharged to water Pollute the surrounding surface This impact is M H pollution bodies unavoidable but can be mitigated. Groundwater Wastewater leakage Long-term and wide-spread. M contamination Special attention to pressurized pipes. Infiltration from sludge drying Long-term and dangerous if the lake bottom is not properly M beds or tanks lined. Operational Algae blooming creating Long-term and directly harmful for local residents M conditions for flies and problems mosquitoes development Not high because it is far from residential areas M Air Odors Not high because the buffer zone dimension satisfies TCVN M environment 7222:2002 (300m) pollution Noise L Solid waste Domestic solid waste of workers Small quality and will be collected by public service. L disposal Hazardous waste: chemicals, oils, Small quality but high risk. It must be managed properly. M debris Sludge solid waste from screenings Sewage contains SS, oil and grease, BOD and nutrition. management Impacts from bacteria and odor of stabilized sludge are not Settled sand at intake structure high. Furthermore, with the high content of nutrition, stabilized Raw sludge at ASPS sludge is suitable for agricultural purposes. Biological sludge
term 4.6 Summary of environmental impacts of CETP operation Impacts Sources Description Assessment Negative Positive Dredging and transport of septage Odor emitted from collection and transport of septage Sludge will be generated from CETP, which could affect directly to life enjoyment of people along the haulage route. However, this impact is easily mitigated. Micro-organism dispersion when the truck is not covered properly. M Air pollution due to transportation means: dust, SO2, CO2, CO, NOx L Surface water pollution Treated water discharged to water bodies Pollute the surrounding surface This impact is unavoidable but can be mitigated. M H Groundwater contamination Wastewater leakage Long-term and wide-spread. Special attention to pressurized pipes. M Infiltration from sludge drying beds or tanks Long-term and dangerous if the lake bottom is not properly lined. M Operational problems Algae blooming creating conditions for flies and mosquitoes development Long-term and directly harmful for local residents M Not high because it is far from residential areas M Air environment pollution Odors Not high because the buffer zone dimension satisfies TCVN 7222:2002 (300m) M Noise L Solid waste disposal Domestic solid waste of workers Small quality and will be collected by public service. L Hazardous waste: chemicals, oils, debris Small quality but high risk. It must be managed properly. M Sludge management solid waste from screenings Sewage contains SS, oil and grease, BOD and nutrition. Impacts from bacteria and odor of stabilized sludge are not high. Furthermore, with the high content of nutrition, stabilized sludge is suitable for agricultural purposes. Settled sand at intake structure Raw sludge at ASPS Biological sludge
VIPMP%20ESMF%2020120802%20(TAL%20revised%209%20Mar%202015)%20-%20with%20Roxanne's%20inputs.docx