A Holistic Approach to Site Assessment of Former Landfill and - PowerPoint PPT Presentation

A Holistic Approach to Site Assessment of Former Landfill and Sustainable Remediation Jane Oakeshott Montreal SusRem 2016 1 The world’s leading sustainability consultancy

Contents • Proposed Development • Sustainability Context • Site History, SI & GQRA • Development Options • DQRA • Sustainable Remediation Assessment : MCA • Environment, Social & Economic • Carbon Footprint • Conclusions • Acknowledgements: Don Reid & Alan Thomas 2 The world’s leading sustainability consultancy

Introduction (1) • Proposed Development • Intermodal rail freight exchange • Large distribution centre next to key rail and road radials / national arterial routes • Few suitable sites - requires sufficient land- take, high level • Ground conditions connection & access secondary arrangements, and consideration proximity to the intended • Main constraint: fixed market development level 3 The world’s leading sustainability consultancy

Introduction (2) • Background / Setting for the Assessment of Sustainable Remediation for this site • Project & Sustainability Objectives • Constraints • Stakeholders • Boundaries • Scope & assessment criteria 4 The world’s leading sustainability consultancy

Sustainable Remediation Framework • Based on SuRF-UK Framework for Sustainable Remediation 2010 • Risk Based Land Management principles are at the heart of Sustainable Remediation. • Helps address two fundamental questions: i) Is Remediation Really Necessary? ii) How Much Remediation Is Necessary? Setting the remediation Setting the remediation technical approach specification and strategy CLIENT OBJECTIVE REMEDIAL SITE PROJECT REMEDIATION PLANNING REMEDIATION RISK OPTIONS INVESTIGATION DEFINITION OPTIMISATION (brownfield) CONSTRUCTION ASSESSMENT APPRAISAL CLIENT GOAL Community & stakeholder engagement Sustainable Procurement ability to influence sustainability 5 The world’s leading sustainability consultancy

Sustainable Management Practices: Site Investigation • Former Landfills & Regulatory Context • Site Investigation & GQRA • Initial Engagement Regulators • Findings: • Extent & nature landfill deposits • Generic QRA: - Human Health - Controlled Waters - Gas 6 The world’s leading sustainability consultancy

Development Option (1) • Initial Proposal • Cut-and-Fill under voluntary scheme, CL:AIRE Waste Code of Practice (CoP) adopted in England & Wales • Details CoP (Certainty, Quantity, Suitability, Protection Human Health & Environment) • Liaison regulators • Initial stance • CoP not appropriate, • Permitting regime inflexible - removal landfill • First Option: excavate & replace all waste material … .. • Further liaison – CoP might be applicable if supported by DQRA 7 The world’s leading sustainability consultancy

SMP: Detailed Quantitative Risk Assessment • Brief Details: • Conceptual Model: S-P-R • Definition source term • Finding / agreeing compliance point / receptor with regulator … • Results • Critical to eventual agreement with regulator … . 8 The world’s leading sustainability consultancy

Development Options (2 & 3) • RA: Sign off contaminated land/brownfield officers, resistance still from permitting officers regarding CoP • Second Option: Cut material not suitable for re-use without treatment /containment - not practicable - replace • But then …… Update of Permitting Regime • New Recovery Permit (benefit, suitable, minimum quantity, substitute non-waste, appropriate standards: RA & engineering) • Application to both onsite material redistribution and import • Third Option: Cut-and-Fill & Import Selected Former Waste Material 9 The world’s leading sustainability consultancy

Development Options: Summary 1 st Option: Excavation & replace all landfill material, latter to include import to make up site levels 2nd Option: Replace all cut landfill material & replace, latter to include import to make up site levels 3rd Option: Cut-and-fill with screening for re-use, import of recovered waste to make up site levels 10 The world’s leading sustainability consultancy

Sustainable Remediation Assessment: MCA • ERM developed multi-criteria/ attribute analysis based on CL:AIRE SuRF-UK indicators for 3 categories: • Environment • Social • Economic • First step: relative weighting of the above categories and their sub-categories • Second step: assessment of the remediation development options to determine relative ranking 11 The world’s leading sustainability consultancy

MCA: Environment Relative Assessment Relative Environment Sustainability Criteria Weighting Option 1 Option 2 Option3 Impact on water 3 2 1 1 Impact on soil 2 1 0 0 Impact on air emissions - climate change 3 -1 0 0 Impact on air emissions - local 4 -4 -3 -1 Impact on ecology 1 0 0 0 Natural resource use and waste generation 5 -5 -3 2 Net Environmental Benefit -36 -15 9 • Carbon footprinting undertaken to support assessment of impact on air emissions 12 The world’s leading sustainability consultancy

Carbon Footprint System Boundaries Landfill Excavation & Placement of Material on-site Transport Transport Import Fill Off-site Landfill Material Fuels Imported material Materials & energy used Excavated waste 13 The world’s leading sustainability consultancy

Carbon Footprint 60,000 ¡ 50,000 ¡ 40,000 ¡ t ¡CO 2 -­‑eq ¡ 30,000 ¡ 20,000 ¡ 10,000 ¡ 0 ¡ Op,on ¡1 ¡ Op,on ¡2 ¡ Op,on ¡3 ¡ Excava,on ¡works ¡ Imported ¡Material ¡Transport ¡ Material ¡to ¡Landfill ¡Transport ¡ 14 The world’s leading sustainability consultancy

MCA: Social Relative Assessment Relative Social Sustainability Criteria Weighting Option 1 Option 2 Option3 Human health - chronic & acute risks 3 -2 -1 0 Ethics and equality 1 0 0 0 Neighbourhood & locality 4 -5 -2 -1 Communities and community involvement 2 1 1 1 Uncertainty & evidence 4 -4 -2 2 Net Social Benefit -40 -17 6 • Stakeholders – local community important but regulator most influential 15 The world’s leading sustainability consultancy

MCA: Economic Relative Assessment Relative Economic Sustainability Criteria Weighting Option 1 Option 2 Option3 Direct economic costs & benefits 5 -5 -2 2 Indirect economic costs & benefits 3 -3 -1 1 Employment opportunities & human capital 2 1 1 1 Induced economic costs and benefits 1 1 1 1 Project lifespan & flexibility 3 3 2 1 Net Economic Benefit -22 -4 19 16 The world’s leading sustainability consultancy

MCA: Summary • Environmen t, Social & Economic Net Benefit 30 ¡ Net ¡environmental ¡benefit ¡ 20 ¡ Net ¡social ¡benefit ¡ Net ¡economic ¡benefit ¡ 10 ¡ 0 ¡ Op,on ¡1 ¡ Op,on ¡2 ¡ ¡ Op,on ¡3 ¡ • Sustainability Net Benefit -­‑10 ¡ -­‑20 ¡ 60 ¡ -­‑30 ¡ Overall ¡net-­‑benefit ¡(Sustainability) ¡ 40 ¡ -­‑40 ¡ 20 ¡ -­‑50 ¡ 0 ¡ Op,on ¡1 ¡ Op,on ¡2 ¡ ¡ Op,on ¡3 ¡ -­‑20 ¡ -­‑40 ¡ -­‑60 ¡ -­‑80 ¡ -­‑100 ¡ -­‑120 ¡ 17 The world’s leading sustainability consultancy

MCA: sensitivity • Relative net-benefit • Relative net-benefit (minus economic criteria) 60 ¡ 60 ¡ Overall ¡net-­‑benefit ¡(Sustainability) ¡ Overall ¡social ¡& ¡environmental-­‑benefit ¡(Sustainability) ¡ 40 ¡ 40 ¡ 20 ¡ 20 ¡ Economic ¡ ¡ criteria ¡ 0 ¡ 0 ¡ ¡56% ¡ Op,on ¡1 ¡ Op,on ¡2 ¡ ¡ Op,on ¡3 ¡ Op,on ¡1 ¡ Op,on ¡2 ¡ ¡ Op,on ¡3 ¡ -­‑20 ¡ -­‑20 ¡ -­‑40 ¡ -­‑40 ¡ Economic ¡ ¡ criteria ¡ -­‑60 ¡ -­‑60 ¡ ¡11% ¡ -­‑80 ¡ -­‑80 ¡ Economic ¡ ¡ criteria ¡ -­‑100 ¡ -­‑100 ¡ ¡22% ¡ -­‑120 ¡ -­‑120 ¡ • Option 3 - economic criteria >50% of overall evaluation, • Removal of economic criteria (not prime concern of regulator): significant reduction of ‘score’ and differential with option 2 18 The world’s leading sustainability consultancy

Conclusions • Regulatory context & continued engagement with regulators critical • Risk Assessment underpinned eventual option and regulatory acceptance • Sustainability case strengthened by metrics – sustainability assessment multi-criteria analysis & carbon footprinting 19 The world’s leading sustainability consultancy