BEST MANAGEMENT PRACTICES TO MINIMIZE IMPACTS TO MARINE WATER QUALITY

Transcription

1 Second International Seminar on the Design & Construction of the Second Penang Bridge November 2012 BEST MANAGEMENT PRACTICES TO MINIMIZE IMPACTS TO MARINE WATER QUALITY ERE CONSULTING GROUP SDN BHD (together with Fanli Marine)

2 THE FIRST PENANG BRIDGE Iconic symbol for Penang and a national landmark Officially opened on 15 September 1985 by : Tun Yang Dipertua Negeri Tun Dr Awang Hassan Overall length: 13.5km (8.4km over the South Channel) Bridge designer : The late Tan Sri Prof Chin Fung Kee 4 th longest bridge in Southeast Asia Cable-stayed concrete girder No EIA Height of the tower above water: 101.5m

3 BEFORE THE FIRST PENANG BRIDGE

4 Outline FERRY Oldest ferry service in Malaysia began operation in 1920 connects Sultan Abdul Halim ferry terminal to Raja Tun Uda to ferry terminal at Weld Quay

5 What attracts you to go to Penang?

6 Outline

7 THE SECOND PENANG BRIDGE Another iconic symbol for Penang and national landmark Overall length: 24km (connects Batu Kawan and Batu Maung) Length over water : 16.9 km The longest bridge in Southeast Asia (once completed) Cable-stayed bridge and box girder bridge Targeted open date : January 2014 EIA, EMP and other studies carried out

8 THE PARTIES INVOLVED ERE Independent Auditor Site audit and inspections for each package (including documentation review) Submit audit report to DOE Penang Fanli Marine Fisheries Impact Assessment Study & Monitoring

9 THE SECOND PENANG BRIDGE THE CHALLENGE : HOW TO GET EVERYBODY TO WORK TOGETHER TOWARDS MEETING THE ENVIRONMENTAL REQUIREMENTS? WHAT ARE THE ENVIRONMENTAL REQUIREMENTS? WHAT ARE THE ENVIRONMENTAL CONCERNS? WHAT S THE MONITORING MECHANISM?

10 Summary of Environmental Reports (Prior to construction works) Package Construction Activity Reports Package 1 Main Navigation Span and Sub Structure and Foundation Works for Approach Span, Dredging and Offshore Disposal Environmental Impact Assessment (EIA) - Penang Second Bridge Environmental Assessment Dredging and Disposal of Dredged Material (to fulfill EIA approval condition no. 37) Package 2 Super Structure Works for Approach Spans Environmental Management Plan Penang Second Bridge Environmental Management Plan Dredging and Disposal of Dredged Material Environmental Impact Assessment Construction of Jetties for Pre-Cast Segment Casting Yard (additional requirement imposed by DOE Penang) Environmental Management Plan Package 3 Batu Kawan Expressway and Batu Kawan and Batu Maung Interchange Environmental Management Plan Package 3a Environmental Management Plan Package 3b Environmental Management Plan Package 3c Monitoring and reporting in terms of marine Environmental water quality, Management river Plan water Package quality 3d, air and noise, etc. is conducted in specific frequency to fulfill the approval conditions. Fisheries Impact Assessment Study

11 Summary of Environmental Reports (During construction) Package Construction Activity Reports Package 1 Main Navigation Span and Sub Structure and Foundation Works for Approach Span, Dredging and Offshore Disposal Environmental Monthly Report Environmental Quarterly Report TSS Mapping Report Package 2 Package 3 Super Structure Works For Approach Spans Batu Kawan Expressway and Batu Kawan and Batu Maung Interchange Environmental Monthly Report Environmental Quarterly Report Environmental Monthly and Quarterly Report Package 3a Environmental Monthly and Quarterly Report Package 3b Environmental Monthly and Quarterly Report Monitoring and reporting in terms of marine Package water 3c quality, river water quality, air and noise, etc. is conducted in specific frequency to fulfill the approval conditions. Environmental Monthly and Quarterly Report Package 3d

12 Monitoring Mechanism (During Construction Stage) Monitoring and audit reports (internal and external submission) :- marine and river water quality air and noise level fisheries impact monitoring compliance to EIA approval conditions and EMP report (by various packages) Implementation of mitigating measures

13 Monitoring Mechanism (During Construction Stage) MEETINGS & SITE INSPECTIONS: Monitor compliance by various packages at site Discuss monitoring and audit findings ( Mesyuarat Bulanan Aspek Keselamatan, Kesihatan & Alam Sekitar ) Penalty for non-compliance (internal) SERIOUS!!!!

14 THE SECOND PENANG BRIDGE - What are the key environmental concerns? - What are the sensitive receptors? - Why do we monitor? (where, when, what, frequency)

15 THE SECOND PENANG BRIDGE ENVIRONMENTAL CONCERNS: - IMPACTS MARINE WATER QUALITY - IMPACTS TO MARINE ECOLOGY AND FISHERIES ACTIVIES

16 Construction Phase Dredging & Piling Activities Disposal of Dredged Materials Potential Impacts: Marine water quality - High total suspended solids (TSS), turbidity and sedimentation in the water column Marine life and resources - potential decrease in marine fish landing and aquaculture production Potential Impacts: Marine water quality - high total suspended solids (TSS), turbidity and sedimentation in the water column. Marine life and resources - potential decrease in marine fish landing and aquaculture productions

17 Sensitive Receptors Sensitive Receptors: Fisheries and aquaculture areas areas at Pulau Aman, Sg Jejawi, Sg Udang and Sg Kerian Corals Mangroves along the coastline, particularly at river mouths Batu Maung Batu Kawan aquaculture

18 THE SECOND PENANG BRIDGE ENVIRONMENTAL MONITORING & AUDIT : - WATER QUALITY (MARINE AND RIVER) - FISHERIES IMPACT ASSESSMENT MONITORING - COMPLIANCE TO DOE REQUIREMENTS - IMPLEMENTATION OF MITIGATING MEASURES

19 THE SECOND PENANG BRIDGE WATER QUALITY MONITORING (MARINE AND RIVER) PICTURE OF MEETING

20 Environmental Monitoring for Package 1

21 Marine Water Sampling Locations (Disposal Site & Along Transportation Route) 4 stations (monthly) (WQ) 4 stations along the transportation route (quarterly) (TW)

22 TSS level at WQ2 (April 2009 September 2012)

23 TSS level at WQ3 (April 2009 September 2012)

24 TSS level at WQ4 (April 2009 September 2012)

25 Water Quality Sampling Results (over 3 years) TSS within the baseline limit for the period of 3 years except for few months Online web tracking records showed that there was no illegal dumping of dredged material during transportation

26 Sampling Locations for Dredged Materials

27 TSS Mapping

28 Water Quality Sampling Locations 7 River Water 11 Marine Water Frequency: Monthly

29 THE SECOND PENANG BRIDGE FISHERIES IMPACT ASSESSMENT MONITORING

30 Water Quality Macrobenthos Coral Reef Fisheries Impact Assessment Fisheries Aquaculture

31 FISHERIES IMPACT ASSESSMENT Water Quality Assessment (Bimonthly) 12 sampling points (In-situ and Ex-situ) Compared against: Marine Water Quality Criteria and Standards for Malaysia ASEAN Marine Water Quality Criteria Various published water quality limits for aquatic environment Focus :- parameters related to aquatic ecological health Sampling points located close to major habitats, fishing grounds and aquaculture areas

32 Water Quality & Macro-benthos Sampling Points

33 FISHERIES IMPACT ASSESSMENT Macro-benthos Assessment (Quarterly) Method based on APHA (2005) Collection of sediment samples at 12 sampling points

34 FISHERIES IMPACT ASSESSMENT Coral Reef Assessment (Quarterly) 4 diving sites at Pulau Perjudi Using line transect method

35 Fisheries Assessment (Quarterly) 5 areas FISHERIES IMPACT ASSESSMENT Data collection via: Interviews with selected fishermen Data from the DoF & PNK

36 FISHERIES IMPACT ASSESSMENT Cockle Biomass Assessment 2 sites Collection of cockle length and weight to Indicate their size Estimate their production Sg. Jejawi Sg. Kerian

37 Aquaculture Assessment 4 areas FISHERIES IMPACT ASSESSMENT Data collection via: Interviews with selected cage culture operators & cockle farmers Data from the DoF & PNK

38 Fisheries Impact Assessment Monitoring Results Cockle biomass: The value obtained at S1 and S2 during 2 nd 10 th monitoring ranged from tonnes/ha. Marine capture fisheries: During 2 nd 10 th monitoring, total catch at the landing points ranged from tonnes/month. Aquaculture: The marine cage culture production ranged from kg/m 2 in 2 nd 10 th monitoring.

39 Fisheries Impact Assessment Monitoring Results Macrobenthos: Average density during 2 nd 10 th monitoring ranged from ind./m 2. Annelida was the most common dominant phylum Coral reef: A total of 29 species have been identified throughout most of the monitoring period. Most abundant species were Star Coral (Favites sp.), Anemone Coral (Goniopora sp.) and Boulder-shaped Coral (Porites sp.)

40 Fisheries Impact Assessment Monitoring Results Where seabed productivity (macrobenthos) was concerned, the area still provide food resources for fish and supported nutrient cycling

41 THE SECOND PENANG BRIDGE COMPLIANCE TO DOE AND IMPLEMENTATION OF MITIGATION MEASURES

42 BEST MANAGEMENT PRACTICES IMPLEMENTED FOR SECOND PENANG BRIDGE

43 Siltation & Sedimentation Management SILT CURTAIN Reduce dispersion of suspended sediment from dredging works SILT TRAP Capture run-off from earthworks activities (Package 3C) SILT FENCE - Capture surface runoff from the earthworks activities (Package 3C)

44 Siltation & Sedimentation Management SILT FENCE (Package 3C) GABION WALL (Package 3B)

45 Dredged Material Management & Disposal CLAM SHELL method for dredging works Dredged material disposed at Pulau Kendi Transported to Pulau Kendi using barges Online Tracking Web Fleet used to monitor the barge to ensure no illegal dumping

46 Grout Management GROUT TANK - at the working platform to capture the slurry from the floating batching plant (Main span (Pier 24 & 25)) GROUT POND - at the batching plant to capture the slurry from the washing activity (Package 3A)

47 Generator Set Management Package 3B (land side) All generator sets are placed within the containment tray to capture any spillage Main Span (Marine side)

48 Fuel Management Main Span (Marine side) Package 2 (land side) All skid tanks are placed within the containment bund to capture any spillage

49 Scheduled Waste Management Package 2 (Land side) Package 2 (Marine side) Scheduled wastes placed within the proper scheduled waste storage area. All scheduled wastes have been labeled in accordance to the Environmental Quality (Scheduled Wastes) Regulations

50 Oil and Grease Management Package 2 (Marine side) Package 2 (Land side) Oil and grease traps installed at the washing area to capture the oil and grease from the washing

51 Waste Management Land side Construction waste kept inside the bins and wrapped prior to sending to the mainland for disposal Package 2 (Marine side)

52 Sewage Management Package 2 (Land side) Main Span (Marine Management ) Septic tanks installed for the sewage discharge from the toilets. Desludging carried out regularly.

53 Slope Management Silt trap (Package 3A) Plastic sheets placed on the slopes to prevent soil erosion

54 Housekeeping Good housekeeping on the barges

55 Summary: THE SECOND PENANG BRIDGE - Key success factors CLOSING THE LOOP (plan, implement, checking and taking actions) - Proper monitoring mechanism in place to ensure compliance by all parties - Persistence and patience required from all parties (Relentless checking and issuance of penalty keeps everybody on their toes)

56 Thank You for your attention