Estate Service Asset - PDO

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Petroleum Development Oman Estate Services Asset Environmental Assessment 2002 Review and Update The clinical wastes constitute waste cotton, soiled bandages, used disposable syringes and needles, discarded medicines etc. generated from PDO’s medical clinics. No human anatomical wastes are generated since surgical procedures are not performed in the clinics. These clinical wastes are segregated from other wastes, packaged in puncture proof cardboard cartons, and thermally degraded in the incinerator located inside the waste management centre in PDO. The STP sludge that is generated in the sewage treatment plants is sent to sludge drying beds in sludge tankers. The dried sludge is applied on land within MAF and RAH areas as a soil conditioner. With respect to other hazardous waste such as waste batteries, waste transformer oils, waste lubricating oils, waste oil sludges, contaminated soils etc., they are not routinely generated. If any such wastes are generated, they are temporarily stored in the waste management centre, from where they are transferred to one of the hazardous waste storage facilities in the interior locations. The quantities of the wastes generated in the areas serviced by the estate services asset for the year 2002 are shown in Table 4.2 below: Table 4.2: Solid Wastes Generated in Areas Serviced by Estate Services Waste Type Waste Quantity Classification (2002) Method of Disposal Wet domestic waste Non-hazardous 2462 t Sent to Municipal Landfill Paper Non-hazardous 103 t Sold to waste dealer Scrap Iron Non-hazardous 9 t Sold to waste dealer STP Sludge Hazardous Not reported Used for soil enrichment in MAF area Discarded batteries Hazardous 29 units Neutralised and sold to waste dealers Clinical waste Hazardous 1919 kg Incinerated in the incinerator Waste plastic materials Non-hazardous Not reported Sold to waste dealer Aluminium Non-hazardous 477 kg Sold to waste dealer Incinerator ash Non-hazardous Not reported Sent to Municipal Landfill Empty metal drums Non-hazardous 91 pieces Crushed and sold as metal scrap 4.5 Noise Both stationary and mobile noise generating equipment are used in the areas serviced by estate services. The major stationary noise generating sources are the emergency diesel generators, which are operated very sparingly. The other sources include compressors, pumps and motors used in several places such as STPs, air conditioning plants, water pumping stations. Among these, the motors used in the RAH-STP may be considered significant for its continuous use and proximity to residential places. ©HMR Environmental Engineering Consultants C4 - 8 Oman’s Environmental Consultancy HMR\1501\Estate Services
Petroleum Development Oman Estate Services Asset Environmental Assessment 2002 Review and Update The mobile noise generating sources are the vehicles used for the transportation of people and goods in and out of PDO coastal areas. From all the above, the noise generation from these sources is considered as intermittent. All these equipment generate noise levels ranging from 65 dB(A) to above 90 dB(A) at the source points. 4.6 Accidental Leaks and Spills Accidental leaks and spills may occur from oils, chemicals, sewage and water during their storage and transfer. Oils and chemicals are not used in large quantities in the areas serviced by estate services. The volume of sewage generated every day is quite significant and may result in significant environmental impacts. The volume of water handled is also quite large; however any accidental leaks or spills of water do not result in any environmental consequences. • Oil leaks and spills Diesel oil is the only oil stored in bulk. In order to maintain adequate reserves of fuel for the standby DGs near the computer building, diesel fuel is stored in two aboveground mild steel tanks each of about 2.3 m 3 capacity. These storage tanks are placed on cemented floor and bunded for containment of any leaks and spills. Any major leaks and spills are recovered and sent to the oil saver pit located in MAF area for recycling. Minor leaks are sponged off and any resulting waste is disposed as oily waste. Electrical transformers and switchgear also hold oil inventories. As required by the Omani Electrical Standards, the transformer and switchgear areas are bunded and provided with spill containment provisions. In the event of any major spill, the waste oils are recovered and sent to the oil saver pit for recycling. Minor leaks are sponged off and any resulting waste is disposed as oily waste. It may be noted that only the transformer oils that are free (50 ppm PCB. • Chemical leaks and spills Among the chemicals, the only chemical with significant accidental leakage potential is the sodium hypochlorite solution used for disinfection of potable water as well as the water in the swimming pools. Sodium hypochlorite solution at about 4% strength is stored in 200 L plastic drums and the dosing is done using on-line dosing pumps to ©HMR Environmental Engineering Consultants C4 - 9 Oman’s Environmental Consultancy HMR\1501\Estate Services
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Estate Service Asset - PDO

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