Is a Ton of Material Worth a Ton of Work? Stephanie Boyd, Williams College, Charley Stevenson, Integrated Eco Strategy,

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Presentation transcript:

Is a Ton of Material Worth a Ton of Work? Stephanie Boyd, Williams College, Charley Stevenson, Integrated Eco Strategy,

Overview of project Three scenarios Methodology Analysis of findings Financial analysis Transportation impact Lessons learned Agenda

Kellogg – Originally the President’s House and currently one of the oldest structures (1794) on campus

Before…

Deconstruction…

Moving Kellogg… Video of Kellogg House Move

Landfill Energy recovery Recycling Reuse Source reduction Waste hierarchy Avoid for LEED 100% Diversion LBC Avoid for LEED Perform for LEED

FOUNDATION REMOVED and RECYCLED BASE CASE (Theoretical) BASE CASE (Theoretical) ACTUAL STORY MAXIMUM REUSE- RECYCLE (Theoretical) MAXIMUM REUSE- RECYCLE (Theoretical) MOST Material Landfilled SOME Material Landfilled Some Relocation SOME Material Landfilled Some Relocation Most Material NOT Landfilled Some Relocation Most Material NOT Landfilled Some Relocation Scenarios we considered…

EPA’s: WAste Reduction Model

Range of Emissions Impact by Material Source: METALS

Base Case Metals and concrete recycled Other materials landfilled

Weight Processing/ Transport Emissions Reuse Emissions Recycle Emissions Combustion Emissions Landfill Emissions Material TonsTonnes Aluminum (recycled) Fiberglass (reused) Other0.39 Copper (recycled) Glass (reused) Wood Flooring (reused) Carpet (recycled, reused) Asphalt Shingles (recycled) Drywall (recycled) Steel (reused, recycled) Scrap Wood (landfill) Mixed C&D (landfill) Clean Wood (reused, recycled) Concrete (recycled) Total The Actual Story Higher reuse Higher recycling Some landfill

By weight, most material was recycled. Significant portion of non-foundation materials was landfilled.

WeightDisposal Emissions Reuse Emissions Recycle Emissions Combustion Emissions Landfill Emissions Maximize Reuse Recycling Assumptions MaterialTonsTonnes Aluminum Fiberglass Insulation Other Copper Glass Wood Flooring Carpet % reused, compared to 46% Asphalt Shingles % reused, rather than recycled Drywall Steel Medium Density Fiberboard/Scrap Wood % recycled rather than combusted, landfilled Mixed Construction and DemolitionDebris % recycled rather than landfilled Dimensional Lumber/Clean Wood % recycled rather than reused Concrete Total Maximum Reuse and Recycling

Emissions Savings by Scenario

Most emissions benefit due to wood Concrete – lot of weight, small benefit. ….and metals.

CostsDemolitionActualMaximum Foundation $ Deconstruction/Demolition $ $ Total $ $ Cost per tonne emissions $ $ -889 Cost per ton of material $ 56 $ 186 Financial Analysis

How far should you drive? Example: 130 miles to Boston

Reuse or recycle as much of the wood as possible Concrete has minimal impact on emissions Are we measuring/evaluating the right things? Transportation not as important as we thought! Planning, planning, planning Lessons Learned

Stephanie Boyd Director Zilkha Center for Environmental Initiatives Williams College Charley Stevenson Integrated Eco Strategy Williamstown, MA Stephanie Boyd Director Zilkha Center for Environmental Initiatives Williams College Charley Stevenson Integrated Eco Strategy Williamstown, MA QUESTIONS AND COMMENTS

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