Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital
Project Profile
August 2017
Submitted by Queen Mary Hospital
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Table of Contents 1. BASIC INFORMATION ...... 1 1.1. Project Title ...... 1 1.2. Purpose and Nature of the Project ...... 1 1.3. Name of the Project Proponent ...... 2 1.4. Location and Scale of Project...... 2 1.5. Consideration of Alternative ...... 2 1.6 Designated Projects to be covered by the Project Profile ...... 3 1.7 Name and Telephone Number of Contact Person ...... 3 2. PROJECT PLANNING AND IMPLEMENTATION ...... 4 2.1 Project Scope ...... 4 2.2 Project Implementation...... 5 2.3 Project Timetable and Programme ...... 5 2.4 Interactions with Broader Programme Requirements ...... 6 3. MAJOR ELEMENTS OF THE SURROUNDING ENVIRONMENT ...... 7 3.1 Sensitive Receivers ...... 7 3.2 Major Elements of the Surrounding Environment ...... 9 4. POSSIBLE IMPACTS ON THE ENVIRONMENT ...... 10 4.1 Introduction ...... 10 4.2 Waste Management ...... 10 4.3 Water Quality Impact ...... 13 4.4 Air Quality Impact ...... 14 4.5 Noise Impact ...... 14 4.6 Land Contamination ...... 14 4.7 Unsightly Visual Appearance...... 15 4.8 Risk Of Accidents which Results in Pollution or Hazard ...... 15 4.9 Other Environmental Impacts Not Likely to Occur ...... 15 5. ENVIRONMENTAL PROTECTION MEASURES...... 17 5.1 Waste Management ...... 17 5.2 Independent Environmental Checker (IEC) ...... 21 6. USE OF PREVIOUSLY APPROVED EIA REPORTS ...... 22 7. CONCLUSIONS ...... 24
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Figures Figure 1.1 Location of Queen Mary Hospital Figure 1.2 Side Elevation View of Block K and surrounding Buildings Figure 1.3 LG4/F layout Plan of Block K showing the location of the Incinerator Room Figure 1.4 Layout Plan of the Incinerator Room with the Study Area highlighted in red Figure 1.5 Layout Plan of Incinerators’ Chimneys inside Service Duct 1 Figure 1.6 Elevation View of Section A-A of Figure 1.5 Figure 1.7 Elevation View of Section B-B of Figure 1.5 Figure 2.1 Illustration of the Sealing off of Chimneys at the Rooftop Figure 2.2 Illustration of the Works Area involved in Phase 1 Figure 2.3 Illustration of the Works Area involved in Phase 2 Figure 2.4 Layout Plan of the Incinerator Room with the Study Area highlighted in Red with items to be disposed in Phase 1 Figure 3.1 Locations of Selected Representative Air Sensitive Receivers (ASRs) Figure 3.2 Locations of Representative Noise Sensitive Receivers (NSRs) Figure 5.1 Illustration of three-compartment decontamination unit at Incinerator Room LG4/F, Block K Appendices Appendix 4.1 Photos of the Incinerators, Flues and Associated Ductworks Appendix 4.2 Photographic Log of Ash Sampling Appendix 4.3 Laboratory Results of Residual Ash Samples Appendix 4.4 Asbestos Assessment Report Appendix 4.5 Photos of the Asbestos-Containing Gaskets
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 1. BASIC INFORMATION
1.1. Project Title 1.1.1 Decommissioning and disposal of clinical waste incinerators at Block K, Queen Mary Hospital (the “Project”).
1.2. Purpose and Nature of the Project 1.2.1 Established in 1937, Queen Mary Hospital (QMH) is a major acute hospital in the Hong Kong West Cluster (HKWC) of the Hospital Authority (HA), serving a population of over 531,000 in the Central and Western and Southern Districts as well as treating many patients in other geographical districts in Hong Kong. It provides a full range of acute and tertiary services, including 24-hour Accident and Emergency (A&E) services, in-patient services, ambulatory care and rehabilitation services, as well as specialist services covering a wide range of specialties and subspecialties for the residents. 1.2.2 Being the teaching hospital of the Li Ka Shing Faculty of Medicine of The University of Hong Kong, QMH is responsible for providing professional clinical training, pioneering innovative technology, and conducting clinical trials for new treatment modalities. In addition, QMH serves as a tertiary and quaternary referral centre for many complex and advanced services such as organ transplant, neonatal intensive care, coronary care, burns and reconstructive surgery and neurosurgery, for the entire territory. Since July 2003, QMH has become the only designated liver transplant centre in Hong Kong to provide world-class standard liver transplant service. The A&E Department of QMH has been designated as one of the five trauma centres in the territory. 1.2.3 The redevelopment plan, featuring the use of QMH’s northern site to fit the hospital’s future service model as an academic health sciences center, involves the decanting of existing facilities of the north end of QMH complex to the ex-Senior Staff Quarters (SSQ) (which had been converted to and renamed as Block T). It presents a golden opportunity to enable the hospital to enhance its role as a premier teaching hospital, as well as further improving the hospital environment for our patients, medical students, academic partners and colleagues. 1.2.4 The Phase 1 Redevelopment Project of Queen Mary Hospital is conducted in two stages: Stage I Preparatory Works:
Conversion works at the vacated SSQ (renamed as Block T) Construction of a link bridge connecting Block T and the buildings in the hospital complex Road widening works within the hospital boundary Stage II Main Works:
Demolition of Clinical Pathology Building(CPB) and Housemen Quarters (HQ) of QMH as well as Pathology Building (PB) of the University of Hong Kong
Construction of New Block
Provision of an additional access road Construction of a proposed rooftop helipad
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 1.2.5 As part of the demolition of CPB, the existing Body Storage Room at CPB will be relocated to LG4/F of Block K. One of the preparatory works would be decommissioning and disposal of the two existing clinical waste incinerators at Incinerator Room at LG4/F of Block K. 1.2.6 The aforementioned decommissioning and disposal works would be followed by hospital’s renovation works to convert the Incinerator Room at LG4/F of Block K into the Body Storage Room. 1.3. Name of the Project Proponent Queen Mary Hospital 1.4. Location and Scale of Project 1.4.1 Queen Mary Hospital is located in 102 Pok Fu Lam Road on Hong Kong Island. Figure 1.1 shows the location and layout of the Queen Mary Hospital. 1.4.2 Queen Mary Hospital is comprised of Clinical Pathology Building, Main Block, Block J, Block K, Block L, Block S, Cancer Centre, Housemen Quarters, Nurses’ Quarters Block A and B, School of Nursing, Professorial Block, New Clinical Building and Administration Block. Photographic view of Block K and its surrounding buildings from the Northwest direction is shown in Figure 1.2. 1.4.3 The clinical waste incinerators and their associated ductworks are located at the Incinerator Room at LG4/F of Block K. The floor area of the Incinerator Room is approximately 156m2 (13m (D) x 12m (W)). The layout plan of LG4/F of Block K and the layout of the Incinerator Room are presented in Figures 1.3 and 1.4, respectively. The two chimneys, each is approximately 117m in height, are concealed in the concreted Service Duct 1 in the northern corner of Block K from G/F to Rooftop. Figure 1.5 shows the layout of incinerators’ chimneys in the Service Duct 1. Cross section elevation plans of Block K are shown in Figures 1.6 and 1.7. 1.4.4 There are two incinerators at the room. The dimension of the two incinerators are the same, each is approximately 17m3 (1.7m (W) x 2.8m (H) x 3.5m (D)) with 8,000 kg weight and consists of one combustion chamber with a furnace capacity of approximately 10m3 and a secondary combustion chamber of approximately 5m3. The capacity of each incinerator is 150kg/hr of pathological waste and it is driven by Towngas. The incinerators and associated ductworks are constructed mainly of steel except the combustion chamber which is lined with ceramic fire bricks. 1.4.5 The incinerators were installed in 1988. Some of the information such as manufacturer, model and its containing materials cannot be identified and trace from Hospital’s existing records. The usage record of the incinerators was unavailable and according to ex-post holder, the two incinerators had never been in operation ever since. The incinerators were operated only for testing and has been shut down more than 20 years. No recorded accidents or incidents occurred during the operation of the clinical waste incinerators. 1.5. Consideration of Alternative 1.5.1 As both chimneys are located inside the concrete service duct in the northern corner of Block K with limited access, removal of the chimneys will cause severe disruption to the hospital operation such as disturbance to patients, operation theatres, teaching activities, etc. if the decommissioning and demolition works are carried out in one single phase. Also,
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile the service duct is considered as confined space, additional precaution would be required. Furthermore, floor spaces would be needed to be isolated with restricted access for the demolition works and locations of decontamination compartments which would cause further restriction to the access of wards, treatment rooms, offices and operation theatres. 1.5.2 To miminise disruption and disturbance, the decommissioning and demolition works would be best to undertaken in 2 Phases, i.e. the decommission and demolition of the two incinerator units and associated ductworks within the Incinerator Room in the first phase whilst the vertical flues (chimneys) would be demolished when Block K is being demolished. 1.5.3 Additional advantage to carry out the Project in two phases would be the shortening the duration for the conversion of the Incinerator Room into Body Storage Room and to meet the schedule of the Stage II Main Works of QMH Redevelopment Project. 1.6 Designated Projects to be covered by the Project Profile 1.6.1 The decommissioning of the incinerator is classified as a Designated Project under Item 3 of Part II, Schedule 2 of Environmental Impact Assessment Ordinance (EIAO). It is required by the EIAO that an Environmental Permit (EP) is granted from the Environmental Protection Department (EPD) before the decommissioning and disposal works commence. 1.6.2 This Project Profile is prepared under Section 5(11) of EIAO to assess the environmental impacts and propose mitigation measures to meet the requirements of EIAO-TM for the direct application for Environmental Permit. 1.6.3 The Designated Project covered by this Project Profile includes two clinical waste incinerators and associated horizontal ductworks at Incinerator Room, LG4/F of Block K, and the two vertical flues (chimneys) from the ceiling of Incinerator Room, LG4/F to the Rooftop of Block K inside the Service Duct 1. Decommissioning and demolition works will be carried out in 2 Phases. In Phase 1, the incinerator units, the wall-mounted control panel and the horizontal ductworks section will be decommissioned and demolished. The two vertical flues of the incinerators will be decommissioned, and disconnected from the horizontal ductworks section (at ceiling level) and sealed up only in Phase 1. The chimneys will be demolished in Phase 2 when Block K is to be demolished. 1.7 Name and Telephone Number of Contact Person 1.7.1 Parsons Brinckerhoff (Asia) Ltd (PBA) has been commissioned as the Consultant for the Project. 1.7.2 The contact details for the relevant personnel at PBA are shown below: Dr. Alex Cheung Parsons Brinckerhoff (Asia), 7/F One Kowloon, 1 Wang Yuen Street, Kowloon Bay, Hong Kong Telephone: +852 2579 8899 Fax: +852 2856 9902
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 2. PROJECT PLANNING AND IMPLEMENTATION
2.1 Project Scope
2.1.1 The demolition works will be conducted in 2 Phases to minimise the disruption to the hospital operation.
2.1.2 In Phase 1, the incinerator units, the wall-mounted control panel and the horizontal ductworks section will be decommissioned and demolished. The two vertical flues (chimney) of the incinerators will be decommissioned, and disconnected from the horizontal ductworks section (at ceiling level) and sealed up only; but not demolished. In addition, the opening of the chimneys at the rooftop will be sealed up to minimise the entry of rainwater. Stainless steel plate will be securely fastened or welded in place to cover at each end of the chimneys with regular maintenance and inspection. Figure 2.1 illustrates the sealing off of the chimneys at the rooftop. All works except the sealing up of the chimneys at rooftop will be carried out inside the Incineration Room under full containment to avoid the release of any residual ash to the environment. 2.1.3 In Phase 2, the chimneys will be demolished when Block K is to be demolished. The demolition of the chimneys will be undertaken inside Service Duct 1 from the top down starting from the rooftop area under full containment to avoid the release of any particulate and dust to the environment. However, no demolition works of Block K would be commenced prior to the completion of the demolition of the chimneys. 2.1.4 Therefore, the demolition works in Phase 1 are limited to internal area in the Incinerator Room at LG4/F, Block K whilst in Phase 2 demolition works are limited to the internal area of Service Duct 1 of Block K. Figures 2.3 and 2.4 illustrates the works area involved in each phase. 2.1.5 Table 2.1 summarises the items to be disposed / retained at the Incinerator Room and photos of items to be disposed in Phase 1 are shown in Figure 2.4. Table 2.1 Items to be Disposed of/ Retained at the Incinerator Room in Phase 1
Item No. Description Disposed Retained of
Phase 1
1.1 Incinerator units
1.2 Horizontal Ductworks for incinerator units
1.3 Wall-mounted Control Panel for incinerator 1 & 2
1.4 Control panel for exhaust fan for LG501D compressor / vacuum EQP. Room
1.5 Fused link boxes
1.6 DDC control panel
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Item No. Description Disposed Retained of
1.7 FAD to KLG6
1.8 Air conditioning ductworks
Phase 2
2.1 Inner and outer steel shell of chimneys
2.2 Insulation materials
2.1.6 Description of the demolition works is presented in Section 5. 2.2 Project Implementation 2.2.1 The decommissioning and disposal works will be carried out by a Specialist Contractor appointed by the project proponent or its representative. 2.2.2 Under the Gas Safety Ordinance (CAP.51), registered gas contractor shall be employed to disconnect the gas supply and decommissioning of the incinerators. 2.3 Project Timetable and Programme 2.3.1 Phase 1 of the project is targeted to commence in October 2017 and complete in November 2017. The actual work period is expected not to exceed 14 days. A tentative project programme is shown in Table 2.2. Table 2.2 Tentative Programme for the Decommissioning and Disposal of the Incinerator Task Time Required
Site Preparation and Containment Construction
Preliminary site decontamination 0.5 day
Construction of containment 5 days
Smoke test 0.5 day
Removal
Removal and decommissioning of clinical waste 5 days incinerators and associated ductworks
Disposal of Waste Within 1 day from obtaining waste disposal permit 2.3.2 Currently, there is no timetable for the demolition of Block K, the programme for Phase 2 works will be incorporated into the programme for the demolition of Block K in future.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile However, the chimneys should be demolished prior to any demolition works of Block K. A tentative project programme for Phase 2 is shown in Table 2.3. Table 2.3 Tentative Programme for the Disposal of the Chimneys in Phase 2
Task Time Required
Site Preparation and Containment Construction
Preliminary site decontamination 0.5 day
Construction of containment 5 days
Smoke test 0.5 day Removal
Removal of chimneys and associated insulation materials 14 days
Disposal of Waste Within 2 day from obtaining waste disposal permit
2.4 Interactions with Broader Programme Requirements 2.4.1 The decommissioning of clinical waste incinerators and associated ductworks will be carried out prior to other construction works at the Incinerator Room, as part of the QMH’s Redevelopment Programme.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 3. MAJOR ELEMENTS OF THE SURROUNDING ENVIRONMENT
3.1 Sensitive Receivers 3.1.1 Sensitive receivers, as identified by the Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM), include residential developments; educational institutions; healthcare facilities; place of worship; agricultural areas; watercourses; beaches; groundwater resources; marine water resources; industries sensitive to pollution; airsheds with limited capacity to disperse pollution; areas of conservation value; place of high visual value; and sites of cultural heritage. 3.1.2 Representative Air Sensitive Receivers (ASRs) within the distance of 500m from the site boundary and representative Noise Sensitive Receivers (NSRs) within the distance of 300m from the site boundary have been identified and summarised in Tables 3.1 and 3.2, respectively. NSRs which do not rely on opened windows for ventilation are excluded. Locations of representative ASRs and representative NSRs are shown in Figures 3.1 and 3.2 respectively. Table 3.1 Locations of Representative Air Sensitive Receivers Distance from No. Name Type of Use the Project (m) Block K Clinical --- Clinical Pathology 1 Clinical 29 Building Housemen 2 Residential 32 Quarters The University of 3 Hong Kong Educational 74 Pathology Building Queen Mary 4 Clinical 99 Hospital Block S Queen Mary 5 Clinical 145 Hospital Main Block Sassoon Road 6 Recreation 165 Rest Garden 2 7 Cancer Center Clinic 208 8 Wei Lun Hall Residential 217 Sassoon Road 9 Recreation 220 Rest Garden 1 Nurses' Quarters 10 Residential 234 Block A 11 Lady Ho Tung Hall Residential 243 12 Professorial Block Educational 249 Residential Sandy Bay Upper 13 and 249 Village Cultivation 14 R.C. Lee Hall Residential 262 15 Lee Hysan Hall Residential 267 New Clinical 16 Educational 287 Building 17 Glamour Court Residential 299
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Distance from No. Name Type of Use the Project (m) The University of Hong Kong Jockey 18 Club Building for Educational 301 Interdisciplinary Research Nurses' Quarters 19 Residential 320 Block B 20 Royalton II Residential 321 Dexter H.C. Man 21 Residential 327 Building 22 CNT Bisney Residential 330 23 School of Nursing Educational 334 24 Bisney Gardens Residential 337 Institute of 25 Educational 339 Molecular Biology 26 Sunlight Court Residential 352 27 Royalton Residential 365 Partrick Mansion 28 Residential 366 Building 29 Mognolia Garden Residential 373 30 Bisney Cove Residential 383 31 Consort Villas Residential 391 32 Estate Building Office 392 33 Consort Garden Residential 396 Pok Fu Lam 34 Recreation 399 Country Park Pauline Chan 35 Educational 402 Building 36 Kai Ming Temple Worshipping 408 37 Bisney Villas Residential 412 Caritas Wu Cheng- 38 Chung Secondary Educational 419 School 39 Radcliffe Educational 426 40 May Court Residential 426 Tai Hau Wan 41 Village Sitting- Out Recreation 427 Area 42 Honourgarten Residential 430 43 King's Court Residential 437 44 Regent Palisades Residential 439 Mount Davis 45 Residential 445 Garden 46 Ebenezer School Educational 454 No. 7 Mount Davis 47 Residential 459 Road 48 Cherry Court Residential 465
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Distance from No. Name Type of Use the Project (m) Tai Hau Wan 49 Residential 479 Village The Hong Kong Jockey Club 50 Clinical Research Educational 482 Centre Laboratory Block 51 Dor Fook Mansion Educational 488 The University of Hong Kong Li Ka 52 Educational 491 Shing Faculty of Medicine 53 Jessville Educational 491 54 Greenvale Residential 492 55 Victoria Garden Residential 493 Bisney Road 56 Children's Recreation 496 Playground Ebenezer School & 57 Home For The Educational 496 Visually Impaired 58 Albany Court Residential 497 59 The Regalis Residential 499
Table 3.2 Locations of Representative Noise Sensitive Receivers Distance from No. Name Type of Use the Project (m) Block K Clinical --- NSR1 Wei Lun Hall Residential 217 NSR2 R.C. Lee Hall Residential 262 NSR3 Lee Hysan Hall Residential 267 NSR4 Glamour Court Residential 299
3.2 Major Elements of the Surrounding Environment
3.2.1 Queen Mary Hospital site is situated on a hillside in Pok Fu Lam, the south western side of Hong Kong Island. Pok Fu Lam Road is located at the west of the Project Site, buildings of the University of Hong Kong located at further west. The Project Site is surrounded by residential buildings in the west and in the south. To the north-west of the Project Site is Hong Kong Chinese Christian Churches Union Pokfulam Road Cemetery. To the east of the Project is Pokfulam Country Park.
3.2.2 All the above major elements of the surrounding environment are unlikely to affect the Project.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 4. POSSIBLE IMPACTS ON THE ENVIRONMENT
4.1 Introduction 4.1.1 The nature and scale of the Project is considered to be small and the works will be limited to internal areas, therefore, the potential impacts are considered minimal. 4.1.2 The key environmental impacts associated with the decommissioning and disposal of the incinerators and chimneys at the site are listed in Table 4.1 and are discussed in the following sections. Table 4.1 Potential Environmental Impacts
Likely to occur Source (without mitigation measures)
Waste management
Water quality
Air quality (dust emission)
Noise x
Land contamination x
Unsightly visual appearance x
Gaseous emission x
Odour x
Night-time operations x
Traffic generation x
Disruption of water movement or bottom x sediment
Ecological impact x
4.2 Waste Management 4.2.1 A list of substances or chemicals (in any form, quantity and concentration), including asbestos, dioxins, polychlorinated biphenyls (PCBs) and heavy metals (HMs), is specified under Schedule 1 of the Waste Disposal (Chemical Waste) (General) Regulation of the Waste Disposal Ordinance (WDO) that would cause pollution or constitute a danger to health or risk of pollution to the environment. Potential chemical wastes to be generated from the decommissioning and demolition of the incinerators and associated ductworks include residual ash and asbestos-containing materials in Phase 1 of the Project whilst chemical waste is not expected to be generated in Phase 2. 4.2.2 The key environmental impacts are associated with the residual ash remaining in the incinerator unit and ash collector. Ash sampling and analysis was undertaken to identify the associated risks and enable environmental protection and mitigation measures to be proposed accordingly.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Residual Ash 4.2.3 Visual inspection of the clinical waste incinerator site was conducted on 1 December 2016. Photos of the incinerator and the associated ductworks are showed in Appendix 4.1. 4.2.4 To establish the conditions in relation to the residual ash, and there was sufficient residual ash inside the combustion chambers and from the bottom of secondary combustion chambers, detailed ash sampling was undertaken on 1 December 2016. There is no residual ash found inside other parts of the incinerator including chimneys, flues and ductworks. 4.2.5 The contamination confirmatory investigation was undertaken by a Hong Kong Laboratory Accreditation Scheme (HOKLAS) accredited laboratory to examine the levels of Dioxins, PCBs and HMs in the residual ash. 4.2.6 The sampling locations are summarised in Table 4.2. Four (4) samples of residual ash were collected from the incinerator combustion chambers and bottom of secondary combustion chambers. A photographic log of the sampling is presented in Appendix 4.2. Composite ash samples, namely, Bottom Ash and Fly Ash, by combining the two bottom ash samples and the two fly ash samples at equal portion, respectively, were tested for Dioxins, PCBs and HMs. Table 4.2 Ash Sampling Locations
Ash Sampling Location
Bottom Ash 1 Bottom of combustion chamber of Incinerator No. 1
Bottom Ash 2 Bottom of combustion chamber of Incinerator No. 2
Fly Ash 1 Fly ash at bottom of secondary combustion chamber of Incinerator No. 1
Fly Ash 2 Fly ash at bottom of secondary combustion chamber of Incinerator No. 2
4.2.7 Tables 4.3 to 4.4 list the results of the analysis. Detailed analytical results are presented in Appendix 4.3. Table 4.3 Heavy Metals (HMs) Analysis of Residual Ash Samples Sampling Result (mg/kg) Parameter Reporting Limit (mg/kg) Bottom Ash Fly Ash Antimony 1 23 61 Arsenic 1 3 2 Barium 1 1010 310 Cadmium 0.2 15.9 39.4 Chromium III 1 194 190 Chromium VI 1 <1 <1 Cobalt 1 5 3 Copper 1 610 778 Lead 1 174 921 Manganese 1 314 289
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Sampling Result (mg/kg) Parameter Reporting Limit (mg/kg) Bottom Ash Fly Ash Molybdenum 1 13 45 Nickel 1 166 70 Tin 1 60 102 Zinc 1 1350 670 Mercury 0.05 3.92 6.31 Chemical Waste* Yes Yes
Note: * Classification in accordance with Part A Chemical Waste under Schedule 1 of the Waste Disposal (Chemical Waste) (General) Regulation
Table 4.4 Polychlorinated Biphenyls (PCBs) and Dioxins Analysis of Residual Ash Samples Sampling Result (mg/kg) Parameter Reporting Limit (mg/kg) Bottom Ash Fly Ash Dioxins (I-TEQ) - 1.30E-03 3.20E-03 PCBs 0.1 <0.1 <0.1 Chemical Waste* Yes Yes
Note: * Classification in accordance with Part A Chemical Waste under Schedule 1 of the Waste Disposal (Chemical Waste) (General) Regulation 4.2.8 As shown in Tables 4.3 – 4.4, both Composite Bottom Ash and Composite Fly Ash samples were found to contain heavy metals and dioxin. 4.2.9 In summary, the ash belongs to Part A Chemical Waste under Schedule 1 of the Waste Disposal (Chemical Waste) (General) Regulation. Protective measures would be required when the incinerators are demolished. 4.2.10 As the incinerators were operated only during the testing after installation, it is expected that residual ash deposited inside the incinerator unit and are minimal. The total volume of contaminated residual ash to be removed for the two incinerators is about 0.5m3 in total. Advice from the EPD was sought for disposal of the residual ash and waste generated from the demolition. The residual ash shall be regarded as chemical waste and disposed of at the Chemical Waste Treatment Centre (CWTC). Asbestos-containing Materials 4.2.11 An asbestos assessment was undertaken on December, 2016 by a Registered Asbestos Consultant. The Asbestos Assessment Report is presented in Appendix 4.4. 4.2.12 4 nos. of gasket (each approximately 20cm diameter and 5mm thick) to primary and secondary burner of incinerators were identified containing Chrysolite 70%. No asbestos-containing materials (ACMs) were identified in the survey for the flange gasket, door seal, the entrance of both incinerators and insulation materials for the chimneys. Photos of the asbestos-containing gaskets are presented in Appendix 4.5. 4.2.13 According to Government Gazette Notice (GN) No. 25/1997 G.N. 3021 under Sections 69(2) and 75(4) of Air Pollution Control Ordinance (Chapter 311), ACM non-woven non friable gasket is an exempted material. It is not required for an owner to submit an Asbestos Investigation Report (AIR) or an Asbestos Abatement Plan (AAP) to the Authority. However,
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile The removal of ACM requires special precautions and strict compliance with the Air Pollution Control Ordinance and relevant regulations; and All ACM wastes should be collected by a licensed chemical collector according to Waste Disposal (Chemical Wastes)(General) Regulation. 4.2.14 Prior to the commencement of any asbestos works, the project proponent or its representative shall notify the EPD 28 days in advance of the intended works on a specified notification form. Incinerator Unit and Others 4.2.15 As ash deposited inside the combustion chamber as well as attached to its associated walls, and ductworks, the Specialist Contractor shall use a High Efficiency Particulate Air (HEPA) vacuum to clean these materials, wet wiping before wrap them in polythene and dispose of at CWTC. 4.2.16 It is estimated that 50m3 of this contaminated waste would be generated from Phase 1 of the Project. For Phase 2, it is estimated that 50m3 of contaminated waste would be generated, mainly from the wet wiping of the inner shell of the chimneys. With implementation of appropriate mitigation measures as described in Section 5.1, no adverse impact is anticipated. 4.3 Water Quality Impact
4.3.1 The Practical Note for Professional Persons on Construction Site Drainage (PN1/94) issued by the EPD provides guidelines for the handling and disposal of construction site discharges and shall be adopted to minimise impacts on water quality.
4.3.2 Wastewater generated from the decommissioning and demolition works will be limited to general cleaning works, and water used in dust suppression whilst wastewater from the shower unit of the 3-compartment decontamination unit will be collected and discharge into the hospital sewerage system. Any water will be wiped dry with cloths. The damp cloths shall be stored in appropriate containers such as drums and jerricans for proper disposal. The Specialist Contractor should take precautionary measures to minimise the quantity of wastewater generated.
4.3.3 In order to estimate the sewage volume will be generated, the flow rate of 0.150 (for construction activity) + 0.080 (for commercial employee) m3 per day per construction worker in accordance with Table T-2 of EPD’s Guidelines for Estimating Sewage Flows for Sewage Infrastructure Planning was adopted. At this planning stage, eight (8) workers are expected to work for the Project each day and the demolition work will be completed in 14 days. A volume of 25.76m3 would be produced from the project. As the demolition works will be undertaken inside the hospital, the workers will use the toilets provided inside the hospital. The actual volume of wastewater to be generated is expected to be lower than the estimated figure and this would have minimal effect on the existing sewerage system.
4.3.4 In addition, cloths which have been used for wet wiping will not be re-used therefore the only wastewater generated by this cleaning process will be limited to that on the surfaces of the equipment; it is anticipated that this water will evaporate and no contaminated wastewater will be generated.
4.3.5 The floor drain in the incinerator room shall be covered with a temporary seal during the decommissioning and demolition works. The top of the chimney should be sealed with polyethylene sheets at least twenty-four (24) hours before the works commence.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 4.3.6 All wastewater arise (if any) from the Project should be treated in compliance with the standards for effluent discharged into foul sewers leading to Government sewage treatment plants, i.e. Table 1 of Technical Memorandum on Standards for Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters. The treated effluent shall also comply with the conditions of the Wastewater Discharge License. 4.3.7 Following the implementation of the above control measures, no unacceptable impact on water quality is anticipated. 4.4 Air Quality Impact
4.4.1 The Project would not involve any demolition works for structures in both phases. With the adoption of “Recommended Pollution Control Clauses for Construction Contracts” of the EPD, the air quality impacts would be minimised.
4.4.2 The decommissioning and demolition of the incinerator units and associated ductworks in Phase 1 will be carried out in an air-tight condition under negative pressure, and hand-held tools and small electric equipment will be used for the decommissioning works, no significant dust emissions are expected.
4.4.3 The demolition of the chimneys in Phase 2 will be carried out in a fully enclosed structure, and hand-held tools and small electric equipment will be used for the decommissioning works, no significant dust emissions are expected.
4.5 Noise Impact 4.5.1 For Phase 1, the demolition of incinerator, and associated ductworks will be taken inside the Incinerator Room and a fully enclosed structure, using hand tools and small powered tools. With the adoption of “Recommended Pollution Control Clauses for Construction Contracts” of the EPD, the construction noise impacts would be minimised. It is unlikely that the demolition activities would affect the nearby NSRs. 4.5.2 For Phase 2, the demolition of chimneys will be taken inside the Service Duct 1 and a fully enclosed structure, using hand tools and small powered tools. With the adoption of “Recommended Pollution Control Clauses for Construction Contracts” of the EPD, the construction noise impacts would be minimised. It is unlikely that the demolition activities would affect the nearby NSRs. 4.5.3 All demolition works in both phases will only be carried out between 07:00 and 19:00 on any day not being a general holiday including Sunday. “Recommended Pollution Control Clause for Construction Contracts” of the EPD will be adopted in the decommissioning and demolishing contract. If powered mechanical equipment is to be used between 19:00 and 07:00 and any time on a general holiday including Sundays, a construction noise permit (CNP) shall be obtained from the EPD. 4.6 Land Contamination 4.6.1 There are 2 nos. of incinerator unit in the Incinerator Room. Each incinerator unit of approximately 17m3 (1.7m (W) x 2.8m (H) x 3.5m (D)), each consisted of one combustion chamber and one secondary combustion chamber. The incinerator was constructed with a durable steel fabrication structure with a high temperature resistance lining and insulating refractory ceramic bricks on solid concrete base which built on top of a concrete slab in the incinerator room. The incinerators are fuelled by
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Towngas. During the site visit, the incinerators, the concrete base and slab are observed to be in good condition. 4.6.2 The incinerators have been shut down more than 20 years. They were installed since 1988 and had not been operated except testing after installation. 4.6.3 Given the above conditions, it is unlikely to have potential land contamination arising from the past operation of the incinerators. 4.7 Unsightly Visual Appearance 4.7.1 The decommissioning and demolition of the incinerators will be undertaken inside the Block K entirely. Minimal visual impact is anticipated. 4.8 Risk Of Accidents which Results in Pollution or Hazard 4.8.1 As with any project, there are risks involved with the Project which if not managed could result in a pollution event or hazard. 4.8.2 The key potential accidents and hazards and control measures are identified in Table 4.5. Table 4.5 Potential Risks and Control Measures
Risk Control Measure
Accidents associated with disconnecting A registered gas contractor will be the Towngas supply – potential impact to employed to undertake this work under human health the Gas Safety Ordinance (CAP.51). Release of dust (ash) into the The decommissioning and demolition environment – potential impacts to work will be carried out in full human health containment, a Specialist Contractor will be employed with adequate health and safety protection measures in place.
Release of chemical waste during A suitably licensed waste collector will transport – potential impacts to human be used to collect, transport and health and/or the environment dispose the chemical wastes to the designated treatment facility under the Trip Ticket System.
4.9 Other Environmental Impacts Not Likely to Occur 4.9.1 This section details the other environmental impacts which are not likely to occur in undertaken the Project. Gaseous Emission 4.9.2 No process will be undertaken in the decommissioning and demolition works which will generate gaseous emissions. Odour 4.9.3 No odours are expected as the majority of waste materials which will be generated by the Project are of solid residues and no odour generating process will be undertaken in the decommissioning and demolition works.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Night-time Operations 4.9.4 Decommissioning and demolition works will be undertaken between the hours of 07:00 and 19:00; hence, there will be no night-time operations associated with the Project. However, if night-time operation is necessary, a CNP should be obtained from the EPD in advance. Traffic Generation 4.9.5 Only limited quantity of demolition waste associated with the decommissioning and demolition works, traffic-associated environmental impact is not anticipated to be significant. Disruption of Water Movement or Bottom Sediment 4.9.6 No discharge to surface water, dredging or reclamation will be undertaken during the Project, therefore, no disruption of water movement or bottom sediment is anticipated. Ecological Impact 4.9.7 There are no nearby areas of ecological or conservation value. The Project will not have any ecological impact.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 5. ENVIRONMENTAL PROTECTION MEASURES
5.1 Waste Management 5.1.1 Decommissioning of the incinerator room and chimneys shall be conducted under full containment to avoid the release of any residual ash to the environment, which could be generated during the decommissioning works in both phases. The following sections detail the approach. Site Preparation and Containment Construction 5.1.2 Preliminary site decontamination of all debris shall be carried out using High Efficiency Particulate Air (HEPA) vacuum cleaner. Except the incineration units, all other existing items shall be removed from the Incinerator Room as far as practicable to avoid obstructing work activities. 5.1.3 All openings shall be sealed with three-layers of fire retardant polythene sheets. 5.1.4 A temporary structure shall be built from the Incinerator Room to enclose the incinerator units and horizontal ductworks (located immediately inside the Incinerator Room in the LG4/F of Block K) in Phase 1 whilst a temporary structure shall be built to enclose the Service Duct 1 in Phase 2. 5.1.5 A three-compartment decontamination unit shall be constructed for entry and exit in to the works area for Phase 1. The unit shall comprise a dirty room, a shower room and a clean room or at least 2m high with 1m x 1m base each with three-layers of fire retardant polythene sheet where all working personnel shall carry out decontamination procedures at the 3-compartment decontamination unit before leaving the works area in Phase 1. Site Supervisor should sign off decontamination record of each worker. The record should be kept on site for inspection by the Project Consultant upon request. Figure 5.1 illustrate the layout of the three-compartment decontamination unit. 5.1.6 Sufficient air movers shall be provided at the Incinerator Room in Phase 1 to exhaust air from the works area. Stand-by air movers shall also be installed. Sufficient air movers shall be maintained to give a minimum of six (6) air changes per hour (ACH) to the works area and, maintain a negative pressure of 1.5 to 4 mm of water within the works area throughout the entire course of the decommissioning works. A pressure monitor shall print out records and audible alarm shall be installed at an easily accessible location to demonstrate that negative pressure is maintained. New pre- filters and HEPA filters shall be used on the air movers. 5.1.7 A copy of the maintenance records of the air movers shall be kept on site for inspection upon request. The appointed Specialist Contractor shall also check the differential pressure of the air mover to ensure that the filter is not blocked. A differential pressure of above 5 mm of water indicates that the filters will need to be changed. All items remain inside the containment shall be covered with at least three (3) layers of fire retardant polythene sheets before the decommissioning works proceed. 5.1.8 Warning signs in both Chinese and English shall be put in conspicuous locations outside the temporary decontamination unit and displayed throughout the entire course of the decommissioning and demolition works.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Smoke Test 5.1.9 Prior to commencement of the decommissioning works, a smoke test with non-toxic smoke shall be carried out to ensure the tightness of the containment and to check whether there are any stagnant pockets of air (indicated by an aggregate of smoke that cannot be effectively extracted). 5.1.10 After a successful test, the air mover shall be switched on to exhaust smoke from the containment and to give a minimum of 6 ACH, and visually check that the absolute filters screen out the smoke effectively and that the pressure gauges read normal. The normal reading of the pressure range for maintaining six (6) air changes per hour shall be 1.5 to 4 mm of water (negative pressure). The audible alarm’s integrity shall also be checked, and the trigger shall be at least 1.5 mm of water (negative pressure). 5.1.11 If the alarm is triggered, the following actions should be performed:
Stop works, evacuate all personnel and prohibit entry; Report to site supervisor and relevant personnel; Check to ensure the monitoring results are correct and detector is not faulty Check the air mover is not faulty and repair/replace if faulty; and Check for air leakage of the containment and repair/replace if necessary. Demolition Works Phase 1 5.1.12 The residual ash inside the incinerator shall be removed by scrabbling. All inner walls of incinerator shall be cleaned using a HEPA vacuum cleaner and the wet wipes. The scrabbled material and the filtered materials from the HEPA vacuum cleaner shall be packed on site and stored in polythene-lined steel drums for disposal of at the designated treatment facility. The collection, transportation and disposal of chemical waste should be carried out by licensed waste collector monitored by the Trip Ticket System. 5.1.13 The detached sections of the incinerators and associated ductworks shall be wet wiped before wrap them with three layers of fire retardant polythene with a third layer secured with duct tape, and segregated from the chemical waste. 5.1.14 The insulation-lined combustion furnace shall be dismantled to manageable size and wet wiped before wrap them with three layers of fire retardant polythene with a third layer secured with duct tape. 5.1.15 All outer layers of polythene sheets shall be decontaminated by wet wipes before leaving the work area. 5.1.16 A registered gas contractor shall be employed to disconnect the Towngas supply to minimize the potential risk under the Gas Safety Ordinance (CAP.51). The appointed registered gas contractor shall give notice and liaise with Hong Kong and China Gas Company Limited to disconnect the gas supply prior to commencement of the decommissioning work and implement adequate precautions to ensure the safety of the gas pipes within and adjacent to the work area. 5.1.17 All workers shall wear full PPE which should include disposable protective overall (such as Tyvek) with hood, nitrile gloves, shoe covers, and full-face positive pressure respirators equipped with a combination cartridge that filters particulate and removes organic vapour.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 5.1.18 Following the completion of the demolition work, all surfaces in the incinerator room shall be decontaminated by HEPA vacuuming and wet wiping. Then the innermost polythene sheet shall be sprayed with Polyvinyl Alcohol (PVA) and upon drying, the inner polythene sheet shall be peeled off. The PVA decontamination process shall then be repeated for the second and third layers of the polythene sheets. All polythene sheets used shall be disposal of at the designated landfill under the surveillance of EPD’s Admission Ticket System. Phase 2 5.1.19 The insulation-lined vertical flues section (chimneys) shall be dismantled to manageable size from the top down starting from the rooftop area. Inner and outer steel shells shall be separated from insulation materials in the detached sections of the chimneys before disposed of. 5.1.20 All workers shall wear appropriate PPE which should include protective overall, gloves and mask that filters particulate. 5.1.21 Following the completion of the demolition work, all surfaces in the incinerator room shall be cleaned by HEPA vacuuming and wet wiping. Disposal Method Phase 1 5.1.22 All residual ash collected from the incinerator, used HEPA filters, scrabbled materials and the HEPA filtered materials shall be disposal of at Chemical Waste Treatment Centre. For the disposal of chemical waste produced from the Project, the Specialist Contractor is required to register with the EPD as a Chemical Waste Producer and to follow the requirements stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. Good quality containers compatible with the chemical wastes shall be used. Appropriate labels shall be affixed securely on each chemical waste container indicating the chemical characteristics of the chemical waste, such as explosives, flammable, oxidising, irritant, toxic, harmful, corrosive, etc. The Specialist Contractor should engage a licensed waste collector to collect, transport and disposed of the chemical wastes in accordance with the Waste Disposal (Chemical Waste) (General) Regulation of WDO under the monitoring of the Trip Ticket System. 5.1.23 For the gaskets (contains 70% chrysotile) to the primary and secondary burner of the incinerators, the removal of the gaskets requires special precautions and strict compliance with the Air Pollution Control Ordinance (APCO). The Specialist Contractor should follow the requirements stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. Good quality containers compatible with the chemical wastes shall be used. Appropriate labels shall be affixed securely on each chemical waste container indicating the chemical characteristics of the chemical waste. All ACM wastes should be collected by a licensed chemical waste collector according to the Waste Disposal (Chemical Waste)(General) Regulation under the monitoring of the Trip Ticket System and disposed at the designated landfill. 5.1.24 Other wastes such as the combustion chambers and outer shell panels and ductworks, polythene wrapping sheets, used PPE, waste generated from the dismantling work of the containment and cloths used for wet wiping are considered as contaminated wastes and shall be stored in appropriate containers such as drums and jerricans for disposal of at designated landfill site. As there is no evidence to confirm that all the deposited/contaminated ash inside the incinerator units, ductworks, etc. can be
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile completely removed by the vacuum cleaner/wet wiping, it seems not justified that part of the incinerator unit/ ductworks can be recycled. The combustion chamber is constructed with refractory bricks which will be removed individually and the outer steel shell will be cut to smaller pieces for disposal at designated landfill. Only the wall- mounted control panel would be recycled. Phase 2 5.1.25 Wastes generated in Phase 2 - demolition of chimneys including inner and outer steel shell to be recycled whilst insulation materials, used PPE, waste generated from the dismantling work and cloths used for wet wiping are considered as general wastes and shall be stored in appropriate containers such as drums and jerricans for disposal of at designated landfill site. It is estimated that 50m3 of waste would be generated in this Phase. 5.1.26 Table 5.1 summarises items that will be demolished and disposed for the Project (Phase 1 and Phase 2) and their proposed outlets. Table 5.1 Summary of Demolished and Disposed Items for the Project (Phase 1 and Phase 2) and Their Proposed Outlets Item No. Demolished and Disposed Item Estimated Proposed Quantity Outlet Phase 1 1. Residual ash 0.5 m3 CWTC 2. Asbestos contained materials (i.e. 4 nos. of Designated gaskets to the primary and gasket , Landfill secondary burner of the incinerators) each 20cm diameter and 5mm thick 3. Used HEPA filters, scrabbled 1m3 CWTC materials and the HEPA filtered materials 4. Combustion chambers and outer 50m3 Designated shell panels and ductworks(1), Landfill(2) polythene wrapping sheets, used PPE, waste generated from the dismantling work of the containment and cloths used for wet wiping 5. Wall-mounted control panel 0.3m3 Recycler listed under Hong Kong Waste Reduction Website
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Item No. Demolished and Disposed Item Estimated Proposed Quantity Outlet Phase 2 6. Inner and outer steel shell of 16m3 Recycler listed chimneys under Hong Kong Waste Reduction Website 7. Insulation materials and waste 50m3 Designated generated from the dismantling work Landfill(2) and cloths used for wet wiping Notes: (1) The combustion chamber is constructed with refractory bricks which will be removed individually and the outer steel shell will be cut to smaller pieces for disposal at designated landfill. (2) As there is no evidence to confirm that all the deposited/contaminated ash inside the incinerator units, ductworks, etc. can be completely removed by the vacuum cleaner/wet wiping, it seems not justified that part of the incinerator unit/ ductworks can be recycled. 5.2 Environmental Monitoring and Audit 5.2.1 Environmental monitoring is considered not necessary as no adverse environmental impacts are anticipated with the implementation of recommended mitigation measures. Environmental site audit should be conducted by an Independent Environmental Checker (IEC) during both phases of decommissioning and demolition works to check, review, verify and validate the overall environmental performance of the project, including the implementation of all the environmental protection and mitigation measures, submissions relating to environmental monitoring and auditing, and any other submissions required under the Environmental Permit for the project or the requirements outlined in the EIAO through report to EPD before and upon completion of the works. 5.2.2 The following monitoring procedures should be adopted and PBA as the Consultant would be responsible for the monitoring operations: To ensure that the general aspects of environmental quality will comply with the project requirements; To monitor the smoke test to ensure the tightness of the containment; To supervise the Contract to ensure that the requirements in the Project Profile are fully complied with; To instruct the Contractor when action is required to reduce or prevent any impacts To effectively and efficiently deal with any complaints on environmental performance; and To prepare a summary of the environmental performance of the Contractor on completion of the Project.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 6. USE OF PREVIOUSLY APPROVED EIA REPORTS
6.1.1 In terms of the decommissioning method and the size of the incinerator involved, the nature of this project is found to be similar to the following approved Project Profiles: Decommissioning and Disposal of Clinical Waste Incinerator and Associated Chimney at ex-Siu Lam Hospital in Tuen Mun, New Territories (Project Profile ref. PP-536/2016, DEP’s decision ref. DIR-247/2016 and Environmental Permit ref. EP-512/2016) Decommissioning of Clinical Waste Incinerators and Associated Chimneys at the Main Block of Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong (Project Profile ref. PP-521/2015, DEP’s decision ref. DIR-240/2015 and Environmental Permit ref. EP-498/2015) Decommissioning and Disposal of incinerator at Yan Chai Hospital (Project Profile ref. PP-394/2009, DEP’s decision ref. DIR 186/2009 and Environmental Permit ref. EP- 374/2009) Decommissioning and Disposal of Clinical Waste Incinerator at Wai Oi Block of Caritas Medical Centre (Project Profile ref. PP-312/2007, DEP’s decision ref. DIR-149/2007 and Environmental Permit ref. EP-278/2007) Decommission and Disposal of Clinical Waste incinerator at Tang Shiu Kin Hospital (Project Profile ref. PP-180/2002, DEP’s decision ref. DIR-074/2002 and Environmental Permit ref. EP-154/2003) Decommissioning of a Clinical Waste Incinerator at Pok Oi Hospital (Project Profile ref. PP-150/2001, DEP’s decision ref. DIR-062/2001 and Environmental Permit ref. EP- 117/2002) 6.1.2 The above Project Profiles shall serve as references for this Project at Queen Mary Hospital. The nature of above Project Profiles is detailed in Table 6.1. Table 6.1 Project Nature of the Referenced Project Profiles
Decommission and Disposal Parts Incinerator Ductworks Chimney Volume Project Profile of Residual Ash (m3) Ex-Siu Lam Hospital Yes Yes Yes 0.5 (ref. PP-536/2016) Pamela Youde Nethersole Eastern Hospital Yes Yes Yes 0.1 (ref. PP-521/2015) Yan Chai Hospital Yes Yes No 0.5 (ref. PP-394/2009) Caritas Medical Centre 10 (Total (ref. PP-312/2007) Yes Yes No chemical waste) Tang Shiu Kin Hospital Yes Yes Yes 0.27 (ref. PP-180/2002) Pok Oi Hospital 10 (Total Yes Yes Yes (ref. PP-150/2001) waste) This Project Yes Yes Yes 0.5
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 6.1.3 The findings of these Project Profiles suggested that it was not necessary to carry out a full-scale EIA Study for the decommissioning of the clinical waste incinerator at the respective hospitals.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 7. CONCLUSIONS
7.1.1 With reference to EIAO-TM, the potential environmental impacts of the decommissioning works of the clinical waste incinerator unit have been discussed and the appropriate mitigation measures to implement environmental control measures have been detailed. 7.1.2 The key focus from an environmental perspective is to avoid release of residue ash to the environment and to avoid contamination of the on-site facilities. Given the small size of the clinical waste incinerators, decommissioning and disposal is not expected to generate any significant environmental impact to the surrounding environment. Summary of the potential environmental impacts and proposed mitigation measures is listed in Table 7.1 Table 7.1 Summary of the Potential Environmental Impacts and Proposed Mitigation Measures
Potential Environmental Impact Proposed Mitigation Measures Release of residue ash The decommissioning and demolition work will be carried out in full containment, a Specialist Contractor will be employed with adequate health and safety protection measures in place. A suitably licensed waste collector will be used to collect, transport and dispose the chemical wastes to the designated treatment facility under the Trip Ticket System. Dust Wet wiping of the surface to minimise airborne dust. The decommissioning and demolition work will be carried out in full containment. Release of asbestos containing The decommissioning and materials and chemical waste demolition work will be carried out in full containment, a Specialist Contractor will be employed with adequate health and safety protection measures in place. A suitably licensed waste collector will be used to collect, transport and dispose the chemical wastes to the designated treatment facility under the Trip Ticket System. Wastewater The floor drain in the incinerator room shall be covered with a temporary seal during the decommissioning and demolition works. The top of the chimney should be sealed with polyethylene sheets at least twenty-four (24) hours before the works commence.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile 7.1.3 Other previously approved Project Profiles for similar projects have been referenced. It was suggested in these Project Profiles that it was not necessary to carry out a full- scale EIA study for the decommissioning of the clinical waste incinerators in hospitals. 7.1.4 This Project Profile has demonstrated that the decommissioning and disposal of the clinical waste incinerators and associated ductworks at Queen Mary Hospital (Designated Project) meet the requirements under EIAO-TM for a direct application for Environmental Permit under Section 5(11) of EIAO.
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Figures
Parsons Brinckerhoff (Asia) Ltd
NORTH
Queen Mary Hospital
Key Plan
Decommissioning and Disposal of Clinical Waste Figure No. Rev.: Incinerator at Block K, Queen Mary Hospital 1.1 5 Location of Block K at Queen Mary Hospital
Date: Jul 2017
Decommissioning and Disposal of Clinical Waste Figure No. Rev.: Incinerator at Block K, Queen Mary Hospital 1.2 2 Side Elevation View of Block K and surrounding Buildings
Date: Jul 2017
Incinerator Room Details are shown in Figure 1.4 NORTH
Not To Scale
Decommissioning and Disposal of Clinical Waste Figure No. Rev.: Incinerator at Block K, Queen Mary Hospital 1.3 3 LG4/F Plan of Block K Showing the Location of the Date: Incinerator Room Jul 2017 Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
NORTH
Decommissioning and Figure No. Rev.: Disposal of Clinical Waste 1.4 1 Incinerator at Block K, Queen
Mary Hospital Date: Layout Plan of the Incinerator Room with the Study Area May 2017 highlighted in Red
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile Chimneys for Boilers B A A
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Chimneys for Incinerators
Clinical Pathology Building
Not to Scale
Block K
Decommissioning and Figure No. Rev.: B Disposal of Clinical 1.5 0 Waste Incinerator at
Block K, Queen Mary Hospital Date: Layout Plan of Incinerators’ Mar 2017 Chimneys inside Service Duct 1
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Items to be demolished in Phase 2
Decommissioning and Disposal Figure No. Rev.: of Clinical Waste Incinerator at 1.6 1 Block K, Queen Mary Hospital
Elevation View of Section A-A of Date: Figure 1.5 (Detailed Directory of Block K is shown after Figure Jun 2017 1.7)
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Items to be demolished in Phase 2
Decommissioning and Disposal Figure No. Rev.: of Clinical Waste Incinerator at 1.7 1 Block K, Queen Mary Hospital
Elevation View of Section B-B Date: of Figure 1.5 (Detailed Directory of Block K is shown Jun 2017 after Figure 1.7)
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Stainless Steel Plates to seal off Chimneys Boilers’ Chimneys
Incinerators’ Chimneys
Decommissioning and Figure No. Rev.: Disposal of Clinical Waste 2.1 1 Incinerator at Block K, Queen Mary Hospital Date: Illustration of Sealing off of Jul 2017 Chimneys at the Rooftop
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
NORTH Works Area (inside Incinerator Room at LG4/F, Block K) in Phase 1
Not to Scale
Decommissioning and Figure No. Rev.: Disposal of Clinical Waste 2.2 0 Incinerator at Block K, Queen
Mary Hospital Date: Illustration of the Works Area Jun 2017 involved in Phase 1
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Works Area (inside Service Duct 1) in Phase 2
Works Area in Phase 11
Decommissioning and Disposal Figure No. Rev.: of Clinical Waste Incinerator at 2.3 1 Block K, Queen Mary Hospital
Date: Illustration of the Works Area involved in Phase 2 Jul 2017
Parsons Brinckerhoff (Asia) Ltd
NORTH Item (3) Horizontal Ductworks for Incinerator No. 1
Item (4) Horizontal Ductworks for Incinerator No. 2
Item (2) Incinerator No. 1 Date: Mar 2017
Item (5) Incinerator No. 5
Item (1) Wall-mounted Control Panel
Item No. Item to be disposed of Disposal Location (1) Wall-mounted Control Panels Recycler listed under Hong Kong Waste Reduction Website (2) Incinerator No. 1 Combustion chamber and outer shell panels to Designated Landfill; Residual Ash to CWTC (3) Horizontal Ductworks for Incinerator No. 1 Designated Landfill (4) Horizontal Ductworks for Incinerator No. 2 Designated Landfill (5) Incinerator No. 2 Combustion chamber and outer shell panels to Designated Landfill; Residual Ash to CWTC
Decommissioning and Disposal of Clinical Waste Figure No. Rev.: Incinerator at Block K, Queen Mary Hospital 2.4 2 Layout Plan of the Incinerator Room with the Study Area highlighted in Red with items to be disposed of in Phase 1 Date: Aug 2017 NORTH
Decommissioning and Disposal of Clinical Waste Incinerator at Block K, Queen Figure No. Rev.: Mary Hospital 3.1 0 Locations of Selected Representative Air Sensitive Receivers (ASRs) Date:
Jun 2017 NORTH
NSR 4
NSR 1 NSR 3 NSR 2
Decommissioning and Disposal of Clinical Waste Incinerator at Block K, Queen Figure No. Rev.: Mary Hospital 3.2 0 Locations of Representative Noise Sensitive Receivers (NSRs) Date:
Jun 2017
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Work Area and 3-Compartment Decontamination Unit sealed by Fire Retardant Polythene Sheets
Floor Drain (Covered)
Incinerator Room Boundary
Ventilation (Air Movers)
Photo of 3-Compartment Decontamination Unit (For illustration only)
Legend: Working Personnel Traffic Direction
Decommissioning and Disposal of Clinical Waste Incinerator at Block K, Queen Figure No. Rev.: Mary Hospital 5.1 3 Illustration of three-compartment decontamination unit and work area sealed with fire retardant polylthene sheet at Incinerator Room LG4/F, Block K in Phase 1 Date: Aug 2017 Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Appendices
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Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Appendix 4.1 Photos of the Incinerators, Flues and the Associated Ductwork
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Photo 1 The incineration chamber door (top) Photo 2 Fire resistance inner wall of the and the bottom ash collection door (bottom) of incineration chamber door. incinerator No. 1.
Photo 3 Fire resistance inner wall of the Photo 4 Residual bottom ash at the bottom of combustion chamber. The top of the chamber the combustion chamber. is in arch-like shape.
Photo 5 Residual ash viewed through the Photo 6 The door of fly ash collection chamber opened bottom ash collection door. at the back of incinerator No. 1.
Site Photos
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Photo 7 Residual fly ash in the fly ash chamber Photo 8 The general view of incinerator No. 1. in incinerator No. 1.
Photo 9 The incineration chamber door (top) Photo 10 Fire resistance, steel framed inner and bottom ash collection chamber door wall of the bottom ash collection door. (bottom) of incinerator No. 2.
Photo 11 Arch-like structure at the top of the Photo 12 Residual bottom ash viewed through combustion chamber, residual bottom ash left the opened bottom ash collection door of at the bottom of incinerator No. 2. incinerator No. 2.
Site Photos
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Photo 13 Door of fly ash collection chamber on Photo 14 Residual fly ashes presented in the the left of incinerator No. 2. fly ash collection chamber of incinerator No. 2, part of the fire resistance inner wall collapsed.
Photo 15 The general view of incinerator No. Photo 16 Chimney connecting to incinerator 2. No. 2, which connects directly to the open environment.
Photo 17 Associated ductwork connecting to Photo 18 Associated ductworks of incinerator the chimney of incinerator No. 1. No. 1.
Site Photos
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Photo 19 Associated ductwork connecting to Photo 20 Associated ductworks of incinerator the chimney of Incinerator No. 2. No. 2.
Photo 21 The general view of Service Duct 1 Photo 22 Close-up view of chimneys in at rooftop. Service Duct 1 at rooftop.
Photo 23 The exits of chimneys at rooftop. Photo 24 Exit of Chimney for incinerator No.1
Site Photos
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Photo 25 Exit of Chimney for incinerator No.2. Photo 26 Chimneys inside Service Duct 1.
Photo 27 The general view of wall-mounted Photo 28 Close-up view of wall-mounted control panel for Incinerator No. 1. control panel for Incinerator No. 1.
Photo 29 Close-up view of wall-mounted control panel for Incinerator No. 2.
Site Photos
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Appendix 4.2 Photographic Log of Ash Sampling
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Photo 1 Residual fly ash samples collected Photo 2 Residual bottom ash sample from incinerator No. 1 (right) and incinerator collected from incinerator No. 1. No. 2 (left).
Photo 3 Residual bottom ash sample collected from incinerator No. 2.
Site Visit on 1 December 2016
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Appendix 4.3 Laboratory Results of Residual Ash Samples
Parsons Brinckerhoff (Asia) Ltd
False
CERTIFICATE OF ANALYSIS
Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Laboratory : ALS Technichem (HK) Pty Ltd Page : 1 of 9 Contact : MR ALEX CHEUNG Contact : Fung Lim Chee, Richard Work Order : HK1648912 Address : 7/F, ONE KOWLOON, Address : 11/F., Chung Shun Knitting Centre, 1 - 3 Wing 1 WANG YUEN STREET, Yip Street, Kwai Chung, N.T., Hong Kong KOWLOON BAY, HONG KONG E-mail : [email protected] E-mail : [email protected] Telephone : +852 3900 2021 Telephone : +852 2610 1044 Facsimile : +852 2856 9902 Facsimile : +852 2610 2021
Project : QMH ASH Quote number : ---- Date Samples Received : 01-DEC-2016 Order number : ---- Issue Date : 21-DEC-2016 C-O-C number : ---- No. of samples received : 2 Site : ---- No. of samples analysed : 2
This report may not be reproduced except with prior written approval from the testing This document has been signed by those names that appear on this report and are the authorised signatories. laboratory. Signatories Position Authorised results for Chan Ka Yu, Karen Manager - Organics Organics Fung Lim Chee, Richard General Manager Inorganics
11/F., Chung Shun Knitting Centre, 1-3 Wing Yip Street, Kwai Chung, N.T., Hong Kong Tel: +852 2610 1044 Fax: +852 2610 2021 www.alsenviro.com Page Number : 2 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
General Comments This report supersedes any previous report(s) with this reference. Results apply to the sample(s) as submitted. All pages of this report have been checked and approved for release. When sampling time information is not provided by the client, sampling dates are shown without a time component. In these instances, the time component has been assumed by the laboratory for processing purposes. Testing period is from 01-DEC-2016 to 15-DEC-2016. Key: LOR = Limit of reporting; CAS Number = CAS registry number from database maintained by Chemical Abstracts Services. The Chemical Abstracts Service is a division of the American Chemical Society.
Specific Comments for Work Order: HK1648912 Sample(s) were received in ambient condition. Ash sample(s) analysed on an as received basis. Result(s) reported on a dry weight basis. Sample(s) as received, digested by In-house method E-ASTM D3974-09 prior to determination of metals. The In-house method is developed based on ASTM D3974-09 method. Dioxins was subcontracted to and analysed by ALS Czech Republic. Page Number : 3 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
Analytical Results Sub-Matrix: ASH Client sample ID BOTTOM ASH FLY ASH COMPOSITE COMPOSITE Client sampling date / time [01-DEC-2016] [01-DEC-2016]
Compound CAS Number LOR Unit HK1648912-001 HK1648912-002 EA/ED: Physical and Aggregate Properties EA055: Moisture Content (dried @ ---- 0.1 % 2.0 1.4 103°C) EG: Metals and Major Cations EG020: Antimony 7440-36-0 1 mg/kg 23 61 EG020: Arsenic 7440-38-2 1 mg/kg 3 2 EG020: Barium 7440-39-3 1 mg/kg 1010 310 EG020: Cadmium 7440-43-9 0.2 mg/kg 15.9 39.4 EG020: Cobalt 7440-48-4 1 mg/kg 5 3 EG020: Copper 7440-50-8 1 mg/kg 610 778 EG020: Lead 7439-92-1 1 mg/kg 174 921 EG020: Manganese 7439-96-5 1 mg/kg 314 289 EG020: Mercury 7439-97-6 0.05 mg/kg 3.92 6.31 EG020: Molybdenum 7439-98-7 1 mg/kg 13 45 EG020: Nickel 7440-02-0 1 mg/kg 166 70 EG020: Tin 7440-31-5 1 mg/kg 60 102 EG020: Zinc 7440-66-6 1 mg/kg 1350 670 EG049: Trivalent Chromium 16065-83-1 1 mg/kg 194 190 EG3060: Hexavalent Chromium 18540-29-9 1 mg/kg <1 <1 EP-066: Polychlorinated Biphenyls Total Polychlorinated biphenyls ---- 0.1 mg/kg <0.1 <0.1 EP-076HK: Polycyclic Aromatic Hydrocarbons (PAHs) Naphthalene 91-20-3 0.500 mg/kg 0.659 1.28 Acenaphthylene 208-96-8 0.500 mg/kg <0.500 <0.500 Acenaphthene 83-32-9 0.500 mg/kg <0.500 <0.500 Fluorene 86-73-7 0.500 mg/kg <0.500 <0.500 Phenanthrene 85-01-8 0.500 mg/kg <0.500 0.848 Anthracene 120-12-7 0.500 mg/kg <0.500 <0.500 Fluoranthene 206-44-0 0.500 mg/kg <0.500 0.597 Pyrene 129-00-0 0.500 mg/kg <0.500 <0.500 Benz(a)anthracene 56-55-3 0.500 mg/kg <0.500 <0.500 Chrysene 218-01-9 0.500 mg/kg <0.500 <0.500 Benzo(b)fluoranthene 205-99-2 0.500 mg/kg <0.500 <0.500 Benzo(k)fluoranthene 207-08-9 0.500 mg/kg <0.500 <0.500 Benzo(a)pyrene 50-32-8 0.500 mg/kg <0.500 <0.500 Indeno(1.2.3.cd)pyrene 193-39-5 0.500 mg/kg <0.500 <0.500 Dibenz(a.h)anthracene 53-70-3 0.500 mg/kg <0.500 <0.500 Benzo(g.h.i)perylene 191-24-2 0.500 mg/kg <0.500 <0.500 EP-076HK: Phenol, Hexachlorobenzene and Bis(2-ethylhexyl) Phthalate Page Number : 4 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
Sub-Matrix: ASH Client sample ID BOTTOM ASH FLY ASH COMPOSITE COMPOSITE Client sampling date / time [01-DEC-2016] [01-DEC-2016]
Compound CAS Number LOR Unit HK1648912-001 HK1648912-002 EP-076HK: Phenol, Hexachlorobenzene and Bis(2-ethylhexyl) Phthalate - Continued Phenol 108-95-2 0.50 mg/kg <0.50 <0.50 Hexachlorobenzene (HCB) 118-74-1 0.200 mg/kg <0.200 <0.200 Bis(2-ethylhexyl)phthalate 117-81-7 5.00 mg/kg <5.00 <5.00 EP-071HK_SR: Total Petroleum Hydrocarbons (TPH) C6 - C8 Fraction ---- 5 mg/kg 7 <5 C9 - C16 Fraction ---- 200 mg/kg <200 <200 C17 - C35 Fraction ---- 500 mg/kg 655 <500 EP-076S: Polycyclic Aromatics Hydrocarbons (PAHs) Surrogates Surrogate control limits listed at end of this report. 2-Fluorobiphenyl 321-60-8 0.1 % 68.2 78.8 4-Terphenyl-d14 1718-51-0 0.1 % Not Determined 60.8 EP-066S: PCB Surrogate Surrogate control limits listed at end of this report. Tetrachlorometaxylene 877-09-8 0.1 % 84.8 91.8 Dibutylchlorendate 1770-80-5 0.1 % 90.4 103 EP-080_SRS: TPH(Volatile)/BTEX Surrogate Surrogate control limits listed at end of this report. Dibromofluoromethane 1868-53-7 0.1 % 90.0 91.4 Toluene-D8 2037-26-5 0.1 % 93.6 95.5 4-Bromofluorobenzene 460-00-4 0.1 % 109 109 Page Number : 5 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
Laboratory Duplicate (DUP) Report Laboratory Duplicate (DUP) Report Matrix: SOIL Laboratory sample ID Client sample ID CAS Number LOR Unit Original Result Duplicate Result Method: Compound RPD (%) EA/ED: Physical and Aggregate Properties (QC Lot: 4377267) HK1648806-001 Anonymous EA055: Moisture Content (dried @ 103°C) ---- 0.1 % 24.6 24.8 1.0 HK1649578-001 Anonymous EA055: Moisture Content (dried @ 103°C) ---- 0.1 % 96.7 96.7 0.0 EG: Metals and Major Cations (QC Lot: 4374814) HK1648764-002 Anonymous EG020: Cadmium 7440-43-9 0.2 mg/kg 0.4 0.4 0.0 EG020: Mercury 7439-97-6 0.2 mg/kg 0.2 0.2 0.0 EG020: Antimony 7440-36-0 1 mg/kg 3 3 0.0 EG020: Arsenic 7440-38-2 1 mg/kg 13 13 0.0 EG020: Barium 7440-39-3 1 mg/kg 282 278 1.2 EG020: Cobalt 7440-48-4 1 mg/kg 10 10 0.0 EG020: Copper 7440-50-8 1 mg/kg 43 43 0.0 EG020: Lead 7439-92-1 1 mg/kg 19 20 0.0 EG020: Manganese 7439-96-5 1 mg/kg 129 129 0.0 EG020: Molybdenum 7439-98-7 1 mg/kg 16 15 0.0 EG020: Nickel 7440-02-0 1 mg/kg 25 24 0.0 EG020: Tin 7440-31-5 1 mg/kg 8 8 0.0 EG020: Zinc 7440-66-6 1 mg/kg 49 51 3.6 HK1648890-001 Anonymous EG020: Mercury 7439-97-6 0.05 mg/kg <0.05 <0.05 0.0 EG020: Cadmium 7440-43-9 0.2 mg/kg <0.2 <0.2 0.0 EG020: Antimony 7440-36-0 1 mg/kg <1 <1 0.0 EG020: Arsenic 7440-38-2 1 mg/kg 32 33 0.0 EG020: Barium 7440-39-3 1 mg/kg 18 18 0.0 EG020: Cobalt 7440-48-4 1 mg/kg 1 1 0.0 EG020: Copper 7440-50-8 1 mg/kg 2 2 0.0 EG020: Lead 7439-92-1 1 mg/kg 42 44 4.8 EG020: Manganese 7439-96-5 1 mg/kg 235 205 13.3 EG020: Molybdenum 7439-98-7 1 mg/kg 2 2 0.0 EG020: Nickel 7440-02-0 1 mg/kg 6 5 0.0 EG020: Tin 7440-31-5 1 mg/kg 2 2 0.0 EG020: Zinc 7440-66-6 1 mg/kg 30 31 0.0 EG: Metals and Major Cations (QC Lot: 4374847) HK1648468-002 Anonymous EG3060: Hexavalent Chromium 18540-29-9 1 mg/kg <1 <1 0.0 HK1648912-002 FLY ASH COMPOSITE EG3060: Hexavalent Chromium 18540-29-9 1 mg/kg <1 <1 0.0 EP-066: Polychlorinated Biphenyls (QC Lot: 4374163) HK1648912-001 BOTTOM ASH COMPOSITE Total Polychlorinated biphenyls ---- 0.1 mg/kg <0.1 <0.1 0.0 EP-076HK: Polycyclic Aromatic Hydrocarbons (PAHs) (QC Lot: 4373266) HK1648468-001 Anonymous Naphthalene 91-20-3 500 µg/kg <500 <500 0.0 Acenaphthylene 208-96-8 500 µg/kg <500 <500 0.0 Acenaphthene 83-32-9 500 µg/kg <500 <500 0.0 Fluorene 86-73-7 500 µg/kg <500 <500 0.0 Page Number : 6 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
Laboratory Duplicate (DUP) Report Matrix: SOIL Laboratory sample ID Client sample ID CAS Number LOR Unit Original Result Duplicate Result Method: Compound RPD (%) EP-076HK: Polycyclic Aromatic Hydrocarbons (PAHs) (QC Lot: 4373266) - Continued HK1648468-001 Anonymous Phenanthrene 85-01-8 500 µg/kg <500 <500 0.0 Anthracene 120-12-7 500 µg/kg <500 <500 0.0 Fluoranthene 206-44-0 500 µg/kg <500 <500 0.0 Pyrene 129-00-0 500 µg/kg <500 <500 0.0 Benz(a)anthracene 56-55-3 500 µg/kg <500 <500 0.0 Chrysene 218-01-9 500 µg/kg <500 <500 0.0 Benzo(b)fluoranthene 205-99-2 500 µg/kg <500 <500 0.0 Benzo(k)fluoranthene 207-08-9 500 µg/kg <500 <500 0.0 Benzo(a)pyrene 50-32-8 500 µg/kg <500 <500 0.0 Indeno(1.2.3.cd)pyrene 193-39-5 500 µg/kg <500 <500 0.0 Dibenz(a.h)anthracene 53-70-3 500 µg/kg <500 <500 0.0 Benzo(g.h.i)perylene 191-24-2 500 µg/kg <500 <500 0.0 EP-076HK: Phenol, Hexachlorobenzene and Bis(2-ethylhexyl) Phthalate (QC Lot: 4373266) HK1648468-001 Anonymous Hexachlorobenzene (HCB) 118-74-1 200 µg/kg <200 <200 0.0 Phenol 108-95-2 500 µg/kg <500 <500 0.0 Bis(2-ethylhexyl)phthalate 117-81-7 5000 µg/kg <5000 <5000 0.0 EP-071HK_SR: Total Petroleum Hydrocarbons (TPH) (QC Lot: 4373265) HK1648468-001 Anonymous C9 - C16 Fraction ---- 200 mg/kg <200 <200 0.0 C17 - C35 Fraction ---- 500 mg/kg <500 <500 0.0 EP-071HK_SR: Total Petroleum Hydrocarbons (TPH) (QC Lot: 4374179) HK1648468-001 Anonymous C6 - C8 Fraction ---- 5 mg/kg <5 <5 0.0 Method Blank (MB), Laboratory Control Spike (LCS) and Laboratory Control Spike Duplicate (DCS) Report Method Blank (MB) Report Laboratory Control Spike (LCS) and Laboratory Control Spike Duplicate (DCS) Report Matrix: SOIL Spike Spike Recovery (%) Recovery Limits (%) RPD (%)
Method: Compound CAS Number LOR Unit Result Concentration LCS DCS Low High Value Control Limit EG: Metals and Major Cations (QC Lot: 4374814) EG020: Antimony 7440-36-0 1 mg/kg <1 5 mg/kg 104 ---- 75 111 ------EG020: Arsenic 7440-38-2 1 mg/kg <1 5 mg/kg 91.3 ---- 75 111 ------EG020: Barium 7440-39-3 1 mg/kg <1 5 mg/kg 90.9 ---- 79 111 ------EG020: Cadmium 7440-43-9 0.2 mg/kg <0.2 5 mg/kg 102 ---- 80 108 ------EG020: Cobalt 7440-48-4 1 mg/kg <1 5 mg/kg 93.4 ---- 74 108 ------EG020: Copper 7440-50-8 1 mg/kg <1 5 mg/kg 94.8 ---- 79 109 ------EG020: Lead 7439-92-1 1 mg/kg <1 5 mg/kg 94.2 ---- 81 107 ------EG020: Manganese 7439-96-5 1 mg/kg <1 5 mg/kg 98.6 ---- 74 116 ------EG020: Mercury 7439-97-6 0.05 mg/kg <0.05 0.1 mg/kg 93.0 ---- 74 114 ------EG020: Molybdenum 7439-98-7 1 mg/kg <1 5 mg/kg 89.1 ---- 78 104 ------EG020: Nickel 7440-02-0 1 mg/kg <1 5 mg/kg 91.5 ---- 74 106 ------EG020: Tin 7440-31-5 1 mg/kg <1 5 mg/kg 102 ---- 79 109 ------EG020: Zinc 7440-66-6 1 mg/kg <1 5 mg/kg 96.2 ---- 76 118 ------Page Number : 7 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
Method Blank (MB) Report Laboratory Control Spike (LCS) and Laboratory Control Spike Duplicate (DCS) Report Matrix: SOIL Spike Spike Recovery (%) Recovery Limits (%) RPD (%)
Method: Compound CAS Number LOR Unit Result Concentration LCS DCS Low High Value Control Limit EG: Metals and Major Cations (QC Lot: 4374847) EG3060: Hexavalent Chromium 18540-29-9 0.5 mg/kg <0.5 2.5 mg/kg 110 ---- 92 122 ------EP-066: Polychlorinated Biphenyls (QC Lot: 4374163) Total Polychlorinated biphenyls ---- 0.1 mg/kg <0.1 0.5 mg/kg 75.0 ---- 43 152 ------EP-076HK: Polycyclic Aromatic Hydrocarbons (PAHs) (QC Lot: 4373266) Naphthalene 91-20-3 50 µg/kg <50 500 µg/kg 73.6 ---- 47 103 ------Acenaphthylene 208-96-8 50 µg/kg <50 500 µg/kg 64.4 ---- 46 90 ------Acenaphthene 83-32-9 50 µg/kg <50 500 µg/kg 69.8 ---- 52 97 ------Fluorene 86-73-7 50 µg/kg <50 500 µg/kg 70.3 ---- 55 98 ------Phenanthrene 85-01-8 50 µg/kg <50 500 µg/kg 77.4 ---- 52 99 ------Anthracene 120-12-7 50 µg/kg <50 500 µg/kg 74.4 ---- 42 95 ------Fluoranthene 206-44-0 50 µg/kg <50 500 µg/kg 87.5 ---- 65 97 ------Pyrene 129-00-0 50 µg/kg <50 500 µg/kg 89.1 ---- 58 105 ------Benz(a)anthracene 56-55-3 50 µg/kg <50 500 µg/kg 80.4 ---- 52 101 ------Chrysene 218-01-9 50 µg/kg <50 500 µg/kg 93.0 ---- 62 108 ------Benzo(b)fluoranthene 205-99-2 50 µg/kg <50 500 µg/kg 84.3 ---- 56 107 ------Benzo(k)fluoranthene 207-08-9 50 µg/kg <50 500 µg/kg 88.9 ---- 62 108 ------Benzo(a)pyrene 50-32-8 50 µg/kg <50 500 µg/kg 79.3 ---- 41 109 ------Indeno(1.2.3.cd)pyrene 193-39-5 50 µg/kg <50 500 µg/kg 89.4 ---- 52 122 ------Dibenz(a.h)anthracene 53-70-3 50 µg/kg <50 500 µg/kg 89.3 ---- 53 107 ------Benzo(g.h.i)perylene 191-24-2 50 µg/kg <50 500 µg/kg 93.8 ---- 56 115 ------EP-076HK: Phenol, Hexachlorobenzene and Bis(2-ethylhexyl) Phthalate (QC Lot: 4373266) Phenol 108-95-2 500 µg/kg <500 500 µg/kg 97.8 ---- 37 112 ------Hexachlorobenzene (HCB) 118-74-1 50 µg/kg <50 500 µg/kg 66.5 ---- 56 107 ------Bis(2-ethylhexyl)phthalate 117-81-7 1000 µg/kg <1000 500 µg/kg 105 ---- 72 136 ------EP-071HK_SR: Total Petroleum Hydrocarbons (TPH) (QC Lot: 4373265) C9 - C16 Fraction ---- 200 mg/kg <200 31.5 mg/kg 104 ---- 69 119 ------C17 - C35 Fraction ---- 500 mg/kg <500 67.5 mg/kg 105 ---- 58 119 ------EP-071HK_SR: Total Petroleum Hydrocarbons (TPH) (QC Lot: 4374179) C6 - C8 Fraction ---- 5 mg/kg <5 4.5 mg/kg 90.9 ---- 77 119 ------Page Number : 8 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report
Matrix: SOIL Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report Spike Spike Recovery (%) Recovery Limits (%) RPD (%) Concentration Laboratory Client sample ID Method: Compound CAS MS MSD Low High Value Control sample ID Number Limit EG: Metals and Major Cations (QC Lot: 4374814) HK1648764-001 Anonymous EG020: Antimony 7440-36-0 50 mg/kg 98.0 ---- 75 125 ------EG020: Arsenic 7440-38-2 50 mg/kg 82.5 ---- 75 125 ------EG020: Barium 7440-39-3 50 mg/kg 91.0 ---- 75 125 ------EG020: Cadmium 7440-43-9 50 mg/kg 97.5 ---- 75 125 ------EG020: Cobalt 7440-48-4 50 mg/kg 95.0 ---- 75 125 ------EG020: Copper 7440-50-8 50 mg/kg 85.2 ---- 75 125 ------EG020: Lead 7439-92-1 50 mg/kg 90.3 ---- 75 125 ------EG020: Manganese 7439-96-5 50 mg/kg 108 ---- 75 125 ------EG020: Mercury 7439-97-6 1 mg/kg 99.0 ---- 75 125 ------EG020: Molybdenum 7439-98-7 50 mg/kg 92.4 ---- 75 125 ------EG020: Nickel 7440-02-0 50 mg/kg 93.0 ---- 75 125 ------EG020: Tin 7440-31-5 50 mg/kg 98.7 ---- 75 125 ------EG020: Zinc 7440-66-6 50 mg/kg 109 ---- 75 125 ------EG: Metals and Major Cations (QC Lot: 4374847) HK1648468-001 Anonymous EG3060: Hexavalent Chromium 18540-29-9 25 mg/kg 109 ---- 75 125 ------EP-066: Polychlorinated Biphenyls (QC Lot: 4374163) HK1648912-002 FLY ASH COMPOSITE Total Polychlorinated biphenyls ---- 0.5 mg/kg 52.2 ---- 50 130 ------EP-076HK: Polycyclic Aromatic Hydrocarbons (PAHs) (QC Lot: 4373266) HK1648468-002 Anonymous Naphthalene 91-20-3 500 µg/kg 91.4 ---- 50 130 ------Acenaphthylene 208-96-8 500 µg/kg 87.3 ---- 50 130 ------Acenaphthene 83-32-9 500 µg/kg 89.2 ---- 50 130 ------Fluorene 86-73-7 500 µg/kg 86.4 ---- 50 130 ------Phenanthrene 85-01-8 500 µg/kg 85.1 ---- 50 130 ------Anthracene 120-12-7 500 µg/kg 87.5 ---- 50 130 ------Fluoranthene 206-44-0 500 µg/kg 85.1 ---- 50 130 ------Pyrene 129-00-0 500 µg/kg 85.2 ---- 50 130 ------Benz(a)anthracene 56-55-3 500 µg/kg 89.9 ---- 50 130 ------Chrysene 218-01-9 500 µg/kg 97.8 ---- 50 130 ------Benzo(b)fluoranthene 205-99-2 500 µg/kg 89.8 ---- 50 130 ------Benzo(k)fluoranthene 207-08-9 500 µg/kg 88.0 ---- 50 130 ------Benzo(a)pyrene 50-32-8 500 µg/kg 87.1 ---- 50 130 ------Indeno(1.2.3.cd)pyrene 193-39-5 500 µg/kg 97.8 ---- 50 130 ------Dibenz(a.h)anthracene 53-70-3 500 µg/kg 98.1 ---- 50 130 ------Benzo(g.h.i)perylene 191-24-2 500 µg/kg 101 ---- 50 130 ------EP-076HK: Phenol, Hexachlorobenzene and Bis(2-ethylhexyl) Phthalate (QC Lot: 4373266) HK1648468-002 Anonymous Phenol 108-95-2 500 µg/kg 96.2 ---- 50 130 ------Hexachlorobenzene (HCB) 118-74-1 500 µg/kg 82.1 ---- 50 130 ------Page Number : 9 of 9 Client : PARSONS BRINCKERHOFF (ASIA) LIMITED Work Order HK1648912
Matrix: SOIL Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Report Spike Spike Recovery (%) Recovery Limits (%) RPD (%) Concentration Laboratory Client sample ID Method: Compound CAS MS MSD Low High Value Control sample ID Number Limit EP-076HK: Phenol, Hexachlorobenzene and Bis(2-ethylhexyl) Phthalate (QC Lot: 4373266) - Continued HK1648468-002 Anonymous Bis(2-ethylhexyl)phthalate 117-81-7 500 µg/kg 98.3 ---- 50 130 ------EP-071HK_SR: Total Petroleum Hydrocarbons (TPH) (QC Lot: 4373265) HK1648468-003 Anonymous C9 - C16 Fraction ---- 31.5 mg/kg 100 ---- 50 130 ------C17 - C35 Fraction ---- 67.5 mg/kg 96.8 ---- 50 130 ------EP-071HK_SR: Total Petroleum Hydrocarbons (TPH) (QC Lot: 4374179) HK1648468-003 Anonymous C6 - C8 Fraction ---- 4.5 mg/kg 91.9 ---- 50 130 ------
Surrogate Control Limits
Sub-Matrix: ASH Recovery Limits (%) Compound CAS Number Low High EP-076S: Polycyclic Aromatics Hydrocarbons (PAHs) Surrogates 2-Fluorobiphenyl 321-60-8 50 130 4-Terphenyl-d14 1718-51-0 50 130 EP-066S: PCB Surrogate Tetrachlorometaxylene 877-09-8 50 130 Dibutylchlorendate 1770-80-5 50 130 EP-080_SRS: TPH(Volatile)/BTEX Surrogate Dibromofluoromethane 1868-53-7 80 120 Toluene-D8 2037-26-5 81 117 4-Bromofluorobenzene 460-00-4 74 121
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Appendix 4.4 Asbestos Assessment Report
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Appendix 4.5 Photos of the Asbestos-Containing Gaskets
Parsons Brinckerhoff (Asia) Ltd
Decommissioning and Disposal of Clinical Waste Incinerators at Block K, Queen Mary Hospital Project Profile
Parsons Brinckerhoff (Asia) Ltd