Estate Service Asset - PDO

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Petroleum Development Oman Estate Services Asset Environmental Assessment 2002 Review and Update facilities in place, the risk to public safety and health is insignificant. LPG is stored in compressed cylinders outside the kitchens. The hazards associated with LPG storage are fire and explosion. LPG cylinders are designed for safe storage under the prevailing environmental conditions and no incidents have been reported so far. Therefore, the risk to public health and safety from LPG storage is considered insignificant. Among the chemicals, the major chemical used is sodium hypochlorite solution at about 4% strength, which is stored in 200 L plastic drums near swimming pools and MAF water storage tank. Considering that the concentration is low and the storage areas are provided with cemented floors with leak containment facilities, the risk to public safety and health from chemical storage is considered insignificant. Based on the above discussion, the impacts on public health and safety are 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) Public Health and Safety Adverse Short term Very low Minor Low ©HMR Environmental Engineering Consultants C6 - 8 Oman’s Environmental Consultancy HMR\1501\Estate Services
Petroleum Development Oman Estate Services Asset Environmental Assessment 2002 Review and Update 7 SUMMARY OF SIGNIFICANT ENVIRONMENTAL EFFECTS AND MITIGATION MEASURES The identification and assessment of environmental hazards and effects in the asset are discussed in Chapter 6. All adverse environmental effects with medium to extreme risk are considered as significant environmental effects. In this chapter, the additional mitigation measures required for minimizing the environmental consequences from these effects are developed. It may be noted that PDO has a comprehensive environmental management plan as a part of the HSE management system (refer Chapter 2), which is implemented in the asset. No change in the existing environmental management system is required. However, certain additional mitigation measures will reduce the potential environmental risk and improve the overall environmental performance. The significant environmental effects are listed below along with explanatory notes. Environmenta l Effect Land contamination Air pollution Depletion of groundwater resources Impact Rating • Adverse • Long term • Medium occurrence • Localised significance • Adverse • Long term • Medium occurrence • Localised significance • Adverse • Long term • Low occurrence • Localised significance Potential Risk Level • High risk • High risk • Medium risk Comments • MAF STP effluent quality exceeded the permissible limits. • The potential risk is predominantly due to long term discharge of large amount of treated sewage on land areas that are accessible to public. • STP monitoring is not comprehensive and some critical parameters such as heavy metals, phenols, sodium absorption ratios etc. are not monitored. • While the ambient air quality in the areas serviced estate services is least affected by air emissions from estate services activities, transboundary emissions have a significant impact. • Significant residential populations are present near MAF industrial area. • Currently available air quality data in MAF indicate significant concentrations of some pollutants. • Over the past 5 years, the water consumption in areas serviced by estate services increased by 18%. • Per capita domestic water consumption in RAH continues to be high at about 400 L/d. ©HMR Environmental Engineering Consultants C 7 - 1 Oman’s Environmental Consultancy HMR\1501\Estate Services
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