Public Fill Management in Hong Kong

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Amy Merritt
5 years ago
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1 Public Fill Management in Hong Kong Presented by Mr. Peter MOK Chief Engineer/ Fill Management, CEDD Fill Management Division Civil Engineering and Development Department

2 Construction and Demolition (C&D) Materials 2 Inert C&D Materials (Public Fill) Rocks, earth, concrete, asphalt, bricks and bentonite, etc. Non-inert C&D Materials Wood, vegetation and plastic, etc.

3 Sources of Surplus Public Fill 3 Public fill generated from Construction Demolition Renovation Excavation Road Works Building Foundation

4 Surplus Public Fill 4 Fill generation in 2015 Total generation 23 million tonnes Fill bank received 16 million tonnes (45,000 tonnes / day) Average no. of truckloads 3,500 /day Private : Public 50% : 50%

5 Composition of Surplus Public Fill 5 Mixed Rock and Soil 56% Slurry 11% Bentonite 2% Broken Rock 2% Soil 20% Reclaimed Asphalt Pavement 1% Broken Concrete 4% Building Debris 4% *According to the statistics of surplus public fill received at Public Fill Reception Facilities in 2015

6 Construction Waste Disposal Charging Scheme 6 Construction Activities Public Fill (Entirely Inert) Mixed C&D Materials (Inert >=50%) Mixed C&D Materials (Inert <50%) Inert C&D Materials Sorting Facility ($100/t) Non-inert C&D Materials Landfill ($125/t) Fill Bank ($27/t)

3- R Principle 7 Reduce Reuse Recycle Better project planning and design to reduce public fill generation Sort the construction waste to recover the reusable

7 3- R Principle 7 Reduce Reuse Recycle Better project planning and design to reduce public fill generation Sort the construction waste to recover the reusable public fill Set up crushing facility to produce recycled products for use in government projects Store the surplus fill at temporary fill banks for future re-use

8 Reclamation to Absorb Surplus Public Fill 8 Public fill are mainly reused in reclamation projects About 500 to 700 ha of land was reclaimed every five years from 1985 to 2004 Year Land Reclaimed (ha) * * Excluding reclamation of 1,274 ha at Chek Lap Kok and West Kowloon

9 Stockpile of Surplus Public Fill 9 With the pace of reclamation slowed down in early 2000s, two fill banks were set up at Tseung Kwan O and Tuen Mun in 2002 to stockpile the surplus materials temporarily In end 2015, Tseung Kwan O Fill Bank Tuen Mun Fill Bank Stockpile 11.9 million tonnes 5.7 million tonnes Capacity 12.6 million tonnes 5.9 million tonnes Fill banks are practically full Total stockpile = 17.6 million tonnes (15 storeys high if stacked in Victoria Park)

10 Delivery Scheme to Mainland 10 Fill banks cannot handle surplus public fill alone In 2004, the then ETWB entered into cooperation agreement with State Oceanic Administration (SOA) ( 國家海洋局 ) to deliver surplus public fill to Mainland for disposal CEDD worked with SOA South China Sea Branch ( 南海分局 ) and in 2006 obtained approval of a disposal site in Taishan ( 台山 ) Delivery started in 2007 In 2015, 13 Mt of public fill was delivered to Taishan. (Note: public fill received at fill bank in 2015 was 16 Mt)

11 Public Fill Reception Facilities 11 Tuen Mun Area 38 Fill Bank 屯門第 38 區填料庫 Tseung Kwan O Area 137 Fill Bank 將軍澳第 137 區填料庫 Mui Wo Temporary Public Fill Reception Facility 梅窩臨時接收設施 Chai Wan Barging Point 柴灣躉船轉運站

Facility 將軍澳第 137 區臨時建築廢物篩選分類設施 Tuen Mun Area 38

12 Construction Waste Sorting Facilities 12 Tseung Kwan O Area 137 Temporary Construction Waste Sorting Facility 將軍澳第 137 區臨時建築廢物篩選分類設施 Tuen Mun Area 38 Temporary Construction Waste Sorting Facility 屯門第 38 區臨時建築廢物篩選分類設施

13 Fill Bank Operation 13 1 Visual Inspection 3 2 Register Vehicle Details Receiving public fill delivered by trucks 13 Weighing

Timber and Domestic Waste Warning to license holder or truck

14 Fill Bank Operation 14 Dumping of Non-inert waste at Public Fill Reception Facilities is not permitted Sludge Metal, Timber and Domestic Waste Warning to license holder or truck drivers Cancellation of dumping license Increased checking frequency

15 Fill Bank Operation Sample Inspection

16 Fill Bank Operation 16 Full Inspection

17 Fill Bank Operation 17 Receiving public fill delivered by barges to fill bank

18 Fill Bank Operation 18 Stockpiling public fill

beyond possible extreme travel distance of landslide debris Travel angle 15 o (GEO TGN 15) Fill

19 Geotechnical Risk of Temporary Stockpile 19 Consequence of Failure Consideration Platforms are temporary in nature Risk under extreme weather conditions Facilities / human activities must lie beyond possible extreme travel distance of landslide debris Travel angle 15 o (GEO TGN 15) Fill banks pose no significant risk Control maximum height of stockpile Travel angle 15 o Extreme travel distance

$observed at slope crest Provide proper drainage system Stockpiles platforms \ <$

20 Geotechnical Risk of Temporary Stockpile 20 Risk Control at Work Fronts No activities at bottom of slopes during dumping operation Suspend operations during extreme weather Excavation do not undermine slopes Fence off for repairs if cracks observed at slope crest Provide proper drainage system Stockpiles platforms \ < 20m > \ 8m

21 Geotechnical Risk of Temporary Stockpile 21 Supervision and Inspections Supervision by in-house professional team Weekly and monthly safety inspections

22 Cross-boundary Delivery Scheme 22 Delivering public fill by vessels to mainland 22

Cross-boundary Delivery Scheme 23 Taishan disposal site 170 km from HK Delivery commenced in July 2007 Up to end 2015, about 87 Mt of public fill has been delivered to reclaim about 636ha of land

23 Cross-boundary Delivery Scheme 23 Taishan disposal site 170 km from HK Delivery commenced in July 2007 Up to end 2015, about 87 Mt of public fill has been delivered to reclaim about 636ha of land Taishan 台山 Taishan Hong Kong 香港 Hong Kong Year Delivery Quantity (Mt) 台山距離香港約 170 公里需 65 艘遠洋船去運送往返來回約 22 小時有機會受惡劣天氣影響每日額外消耗 19,000 公升柴油每日額外碳排放量公噸 9 比本地填海每公噸多 $

24 Cross-boundary Delivery Scheme 24 Vessel Capacity: 3,500 ~ 5,000 tonnes Travelling time: 12 to 14 hours 24

25 Conclusions 25 Less Generation More Reuse More Recycling

26 26 Thank You

Town of Hollis Solid Waste Flow Control Ordinance

Town of Hollis Solid Waste Flow Control Ordinance ARTICLE I. GENERAL 1.1 Short title. Town of Hollis This ordinance shall be known as and may be cited as the "Solid Waste Flow Control Ordinance for the Municipality of Hollis" and shall be referred to