Resource Efficiency
OPC total electric power requirement is approximately 7MW at maximum production capacity from the grid. Upon resuming operation, the overall power consumption will be assessed and applicable energy efficiency measures will be applied including but not limited to boiler efficiency and the power factor.
EHC’s total electric power requirement is approximately 14 MW of which, 9.7 MW will be self-generated by converting the heat release from the exothermic reaction in the nitric acid plant using steam turbines. The remaining power needs will be supplied by the national grid. EHC will also install an onsite 1 MW diesel-driven emergency generator.
Pollution Prevention
Ambient Air Conditions and Stack Emissions
OPC has a 10 ton boiler that uses 13.4 Million m3/y of natural gas. OPC’s flare and boiler are the sources of air emissions to the atmosphere. The released gases from the process (nitrogen, hydrogen, propylene, propane) are sent directly to the flare system. The liquid hydrocarbons (propylene, propane) are heated prior being sent as gas to the flare. The latest air monitoring conducted in 2009 before the shutdown demonstrated that the company was operating in compliance with Egyptian and the WBG EHS Guideline requirements. OPC will install continuous emissions monitoring for PM, CO, SOx, NOx and, once operation starts, as previously it will monitor ambient air (PM, SOx, and NOx) as well as hydrocarbons and oxygen. Further, OPC will install oxygen and hydrogen detectors throughout the plant to identify potential leaks and to prevent accidents.
As part of the ESIA, EHC conducted ambient air monitoring of SO2, CO, NO2, PM10, PM2.5, NH3, ozone, lead, total suspended particles, and PM. The results indicated that the ambient air quality will comply with national legislation and the associated WBG EHS Guideline. EHC also conducted air dispersion modeling to predict the contribution of NOx emissions from the boiler and nitric acid plant, and of particulate matter from the ammonium nitrate plant to the local air quality at normal conditions, emergency situations, and non-routine operations. The results indicated that the cumulative impact to the background ambient air concentrations with the release of EHC’s air emissions will result in air quality standards being maintained within those defined by the local required and those associated with the WBG EHS Guideline. There will also be a flare at the port for emergency situations.
For the construction phase, EHC has established measures (i.e., regular spraying of off-road tracks, cover stockpiling locations, transport material in closed/covered trucks, etc.) to reduce generation of air emissions. The company has also being monitoring the ambient air conditions during the operational phase and the results reveal that the air conditions have been complying with Egyptian and WBG EHS Guideline requirements.
For the operation phase, the plant will have bag filter
s to control PM emissions, and scrubbers to control gaseous emissions. In addition, the gas turbine generator will be equipped with dry low NOx burners to reduce NOx emissions and it will use low sulphur (8 ppmv or less H2S) natural gas to reduce SO2 emissions. EHC will also control the fugitive emissions from the packaging area by installing a local exhaust ventilation system which in turn it will send the collected emissions to bag filters to ultimately reduce the particulates released to the atmosphere. It will also have portable leak detection equipment to identify and prevent fugitive emissions. For the operation phase, EHC will conduct ambient and stack emissions monitoring as well as install continuous emissions monitoring to measure PM, SOx, NOx and CO.
Green House Gases (GHGs)
OPC has one boiler with 10 tons capacity burning natural gas. The estimated amount of CO2 emissions from this process is estimated to be 25,000 tons of CO2 eq/year.
CO2 will be directly emitted during EHC operations; additionally N2O, which is also a greenhouse gas, is expected to be emitted during the operation of the nitric acid plant. The estimated amount of CO2 from the plant operations is 92,000 ton of CO2 eq/year, and of N2O are 82,000 tons of CO2 eq /year.
Water and Liquid Effluents
OPC’s total consumption is approximately 65 m3/h. The water needs are satisfied by the municipal water system. However, in case of supply shortage, OPC can access groundwater from its onsite wells for which it has a permit.
OPC generates domestic waters and wastewater from the reverse osmosis unit. The wastewater generated at the reverse osmosis (RO) units is diluted to <700ppm of total dissolved solids and used for irrigation on the greenbelt around the plant. The 20 m3/day of domestic waters generated are collected in a septic tank, and trucked to the domestic wastewaters treatment plant.
EHC will consume 69 m3/hr of water which will be obtained from onsite wells, authorized by the Ministry of Irrigation and Water Resources. If additional water is needed, EHC will dig additional water wells within its own premises with appropriate approval from the Ministry of Irrigation and Water Resources. Due to the high salinity and high content of hardness and sulphate, EHC needs to treat and desalinize the raw water before use. A closed cooling water system will be provided as the cooling medium in the nitric acid and ammonium nitrate units.
EHC will generate the following wastewaters: (a) concentrated brine from the RO process; and (c) sanitary wastewaters. EHC is being designed to operate as a zero discharge system. All residual wastewaters will be passed through an oil and grease separator, as needed, prior being routed to an evaporation pond, which comprises of 4 basins, for final disposal. In addition, wastewater with small quantities of nitric acid will be neutralized prior being discharged into the evaporation pond. The pond sludge will be removed reg
ularly and analyzed to be classified (hazardous/non-hazardous) and consequently sent to the appropriate disposal/treatment facility by a licensed waste handling contractor. In the instances when the brine treatment unit may not be available, the highly concentrated brine will be discharged via a separate line into the evaporation pond. The sanitary wastewater will be treated in a biological treatment unit. The treated effluent will be disposed into a water disposal pit and the storm water will be sent to storm water soak pits.
As part of the ESIA, EHC also conducted groundwater quality assessment to establish the baseline. To prevent soil and ground contamination, EHC will install double lining on the evaporation pond and will ensure sound practices to prevent its damage during routine removal of solids. It will also establish continuous monitoring of the groundwater quality.
The water from the collected dredged material at the port will be released back into the sea after being analyzed to ensure it is free of pollutants. The contractor commissioned to complete the dredging is being required to implement the needed measures to reduce turbidity, control actions to avoid soil contamination (i.e., spills, leakages), control air pollution emissions, noise levels, etc.
Hazardous Materials and Hazardous Wastes
Propylene (450 ton/d) is the main hazardous material used at OPC. It is stored in 3 isolated spherical tanks equipped with appropriate cooling, firefighting and leak detection equipment, which can be operated independently for each tank remotely from the control room or locally at the tank.
OPC has a Hazardous Materials Waste Register that is followed during operation to assure appropriate safety measures are being followed.
EHC’s hazardous materials include ammonia (storage tank 20,000 MT); nitric acid (storage tank 7,600 MT); ammonium nitrate (bags 1.2 MT); and diesel (storage tank 70 MT). Ammonia is stored/handled in liquid as well as gas state and ammonium nitrate is stored/ handled in various forms including molten ammonium nitrate in the ammonium nitrate unit, ammonium nitrate stockpiles in the packaging area, and bagged ammonium nitrate stacks in the onsite warehouse.
EHC’s hazardous chemicals will be stored in dedicated and secure locations. All hazardous storage areas will have external and internal signs indicating the class and classification of the substances stored. EHC will implement all needed management and control measures for the proper handling of the ammonium nitrate including storage in well-ventilated buildings; ensuring thorough cleaning of the storage area before the material is transported for storage; placement of the storage area away from flammable materials and sources of heat, fire or explosion (i.e., oil storage, gas pipelines, timber yards, flammable liquids, flammable solids and combustible materials); conducting regular inspections and maintenance of electrical equipment
and fittings; strictly forbidding smoking; and clearly displaying material safety datasheets and safety instructions in the storage area. EHC also incorporated risk mitigation measures in the design of the warehouse and bagging areas to help minimize the likelihood and /or consequences of an ammonium nitrate explosion from chemical contamination, external fire, or high energy impact. Specifically, the warehouse will have explosion resistant walls of 200 mm thick reinforced concrete, it will be maintained at a temperature lower than 32 ˚C, it will have an automatic sprinkler system and proper protection from electrical storms, as well as, CCTV – 24 hour security surveillance and security fencing and gates to prevent access to non-authorized personnel. The 5,000 m3 nitric acid storage tank will be surrounded by an acid resistant surface impounding area to handle releases in case of possible leakage.
The EHC wastes generated during the construction phase are segregated and stored in roll-off containers at waste yards managed by the EPC contractor. Domestic solid waste is stored in waste skips and disposed of in a local landfill. Hazardous wastes generated during the construction (i.e., used lubricating oil, batteries, empty drums of paint/solvent/additives, floor sweepings from material storage yard, oily sludge, contaminated soils from spills, electrical and mechanical components, etc.) are stored in drums and containers at the waste yard established by the EPC contractors, and then transferred to licensed waste treatment contractors.
All EHC operational wastes will be strictly controlled and the waste management plan to be developed will establish the waste management procedures to be implemented to ensure its storage, treatment and disposal in accordance with national legislation and IFC requirements. As part of the waste management plan, EHC will develop a tracking system for the collection, transportation, treatment and disposal of all hazardous waste streams leaving the site location. For the operation phase, EHC will have a dedicated roofed well ventilated hazardous waste area in the downstream wind direction, meeting all relevant fire code requirements, with impervious sloped floor, drainage channel, and sump and pump system. This area will have segregated areas by chemical characteristics; restricted entrance/exit and eyewash and showers. The hazardous wastes will be delivered to the Elnasrya landfill which is a government approved site for delivering hazardous wastes through an approved contractor. It is located in Alexandria at approximately 250 km distant from the plant. The non-hazardous wastes such as wooden pallets and sludge from the water treatment unit will be disposed of at Suez Governorate.
EHC and OPC will implement comprehensive Waste Management Plans for both hazardous and non-hazardous waste ensuring safe storage and timely treatment and/or removal of waste. Copy of these Plans will be submitted to IF
C as indicated in the ESAP.
The port dredged material will be temporarily placed in an onsite impermeable lined disposal basin for drying which is located less than 1 km from the port. The dried material will be finally placed in the Sadat Quarries located within 35 km from the port, or equivalent as per Suez Governorate guidance, as authorized by the EEAA and Suez Governorate. EHC will submit to IFC, as indicated in the ESAP, a copy of the dredged material handling and disposal including the relevant transportation impacts and mitigations.
Noise
The noise sources in OPC are limited to pumps, compressors, etc., thus the impact is localized at the equipment area. It is mandatory to use appropriate PPE to mitigate the impact of potential noise. Upon re-commissioning the plant, OPC will make sure the noise levels are maintained in compliance with Egyptian requirements and WBG EHS Guidelines.
The noise model that was conducted as part of EHC’s ESIA for predicting noise impacts during the operation phase indicated that noise levels at the nearby locations will be acceptable to the Egyptian requirements and WBG EHS Guidelines. EHC will implement measures to reduce noise levels further including installing mufflers/silencers to noise generating machinery and generators to reduce noise levels; placing site noisy equipment (e.g. generators) away from receptors, where possible; installing vehicles exhaust silencers, restricting working hours for particularly loud or intrusive activities, among others. In addition, it will also conduct regular inspection and maintenance of vehicles and equipment. EHC will ensure the noise levels are maintained in compliance with Egyptian and IFC requirements.