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Establishment of site security
Chemical plant drain down & dismantling- >500 Tanks- >5000 Pipe Runs
Demolition
Site assessment and characterisation
Construction of a water treatment system
Creation of a18 ha nature reserve
Ecological mitigation
Treatment trials - Eurodemo
Detailed design and regulatory approvals
Full project review
Works To Date
2
04-12-01
TEMPL
.Y
SCALE
APPROVED
DATE
t.
JTS
Off Site Plant Area High Level Stocking Area
Waste Tip inc. Lagoon
2
River Rother and Flood Plain
NE
Water Table
Vapours
Direct Contact: Inhalation / ingestion
Aggressive attack on services / foundations
Leaching of contaminants migration into controlled waters
Wind blown particulates from exposed soils & during disturbance - onto third party land and general public
River RotherLagoon 2
DIAGRAMMATIC CONCEPTUAL MODEL
Metal Contamination
Organic Contamination
Inorganic Contamination
Leachables
Human Health
Structures / Services
Made Ground
Alluvium
Coal Measures
Legend
SW
Source
Pathway
Coal Measures
Groundwater Flow
3
• Complex project nature required early contractor
involvement to ensure the exact nature and cost
of the works were understood
• Bespoke Early Contractor Involvement contract
developed
Bringing a Delivery Expert Into the Team
Preferred contractor appointed May 2006 VSD Avenue – JV
• DEC• Volker Stevin• Sita Remediation
4
Avenue remediation options derived by partnership working.
Seven re-use criteria
Technologies used focus on contamination removal
Current remediation strategy submitted for planning in May 2007
Planning determined November 2007
Full project review 2008
Remediation technologies to be used
–Selective excavation–Complex sorting –Soil washing–Bio-remediation–Thermal desorption
Derivation of Remediation Options
5
River
Flood Relief Scheme
Nature Reserve
Residential Development
Sports Pitches
Option 3 - Full Site Clean-Up, Reclamation and Development
Delivery TimeMain works – 54 months
Anticipated Completion Date – April 2014
Outcomes and Outputs - Environmental liabilities met
- Landowner liabilities met
- Future development area created
- Sports/leisure facilities created
- Nature reserve created
- Landform fully improved
- Full flood relief scheme created
Cost - £172.3m
Lowest Risk Option