Estate Service Asset - PDO

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Petroleum Development Oman Estate Services Asset Environmental Assessment 2002 Review and Update Impact Rating Nature of impact (beneficial / adverse) Duration of impact (short term / long term) Likelihood of occurrence (very low / low / medium / high / very high) Significance of impact (slight / minor / localized / major / massive) Potential risk level (low, medium, high and extreme) Depletion of Ground Water Resources Adverse Long term Low Localized Medium 6.5 Impacts on Air Environment The potential environmental effects on the air environment and the associated environmental hazards are listed below: Environmental Hazards - Release of gaseous emissions from stationary sources - Release of gaseous emissions from mobile sources - Generation of noise from stationary sources - Generation of noise from mobile sources Potential Environmental Effects - Air pollution - Noise pollution • Air Pollution Air emissions from the activities of estate services asset are not significant. There are no continuous stacks. Vent emissions are limited to the vent air from the kitchens. There are no significant fugitive emission sources. The significant point source of air emissions is the clinical waste incinerator, which may emit toxic gases such as carbon monoxide, hydrogen chloride, hydrogen fluoride, dioxins and furans. Since the stack gases are not monitored, their concentrations are unknown. However, since the volumetric flow rate of the stack emissions are quite low and the incinerator is operated only once a month for about 6 hours, they will not have any perceptible impact on the ambient air quality. The emissions from vehicles used by the estate services staff and their contractor staff are not considered to be significant. Therefore, it is reasonable to assume that the impact on ambient air quality from the activities of estate services will be very low. However, the limited air quality data available so far indicate the air quality within the MAF area affected by “trans-boundary” vehicular emissions and by stack and fugitive emissions from other industrial activities in MAF area. The vehicular traffic on the Qurum Heights highway, which passes along the northwest-southeast boundary of MAF industrial area, is quite high. Based on the above discussion, the overall impact on ambient air quality is rated as below: ©HMR Environmental Engineering Consultants C6 - 4 Oman’s Environmental Consultancy HMR\1501\Estate Services
Petroleum Development Oman Estate Services Asset Environmental Assessment 2002 Review and Update Impact Rating Air Pollution Nature of impact (beneficial / adverse) Adverse Duration of impact (short term / long term) Long term Likelihood of occurrence (very low / low / medium / high / very high) Medium # Significance of impact (slight / minor / localized / major / massive) Localised Potential risk level (low, medium, high and extreme) High # # The direct risk from the estate services activities is low. However, when the transboundary emissions are considered, the potential risk level is elevated to high. • Noise Pollution Noise generation sources are not significant in areas serviced by estate services. The stationary sources include diesel generators and small compressors, pumps and motors used in several places such as STPs, air conditioning plants, water pumping stations. The diesel generators are operated very sparingly for emergency power supply. Among the other sources, the motors used in the RAH-STP may be considered significant due to its proximity to residential units. However, the noise level at source is not very high. The mobile noise generating sources are the vehicles used for the transportation of people and goods in and out of PDO’s coastal areas. From the above sources, the noise generation is rated as intermittent. All these equipment generate noise levels ranging from 65 dB(A) to above 90 dB(A) at the source points. Based on the above discussion, the impact on ambient noise is assessed as below: Impact Rating Nature of impact (beneficial / adverse) Duration of impact (short term / long term) Likelihood of occurrence (very low / low / medium / high / very high) Significance of impact (slight / minor / localized / major / massive) Potential risk level (low, medium, high and extreme) Increase in Ambient Noise Levels Adverse Long term Low Minor Medium 6.6 Impacts on Water Environment With respect to water environment, only groundwater is considered since the estate services asset has no interface with the marine environment. The potential environmental effects on the water environment and the associated environmental hazards are listed below: Environmental Hazards - Land discharge of treated sewage effluent - Accidental spills and leaks of oils and chemicals Potential Environmental Effects - Groundwater pollution The groundwater in the MAF area is highly saline. The groundwater flow is discharged into the sea. The land discharge of treated sewage effluent can affect the ©HMR Environmental Engineering Consultants C6 - 5 Oman’s Environmental Consultancy HMR\1501\Estate Services
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