MPCA Green and Sustainable Remediation Initiative June 3, 2014 Sustainable Remediation Roundtable Washington, D.C. Rebecca A. Bourdon, PG Hydrogeologist

Contaminant risk mitigation decision making cognizant of environmental effects, community goals and economic impacts. PRPs GSR Definition

01.02 Toolkit for Greener Practices ARRA LUST Green BMPs LUST Fund- Financed Contract Language LUST GSR Guidance 5.13 PRP GSR Evaluation Project 3 MPCA's GSR Evolution

ITRC GSR Products  Overview Document Green and Sustainable Remediation: State of the Science and Practice  (GSR-1, 2011)  Technical & Regulatory Guidance Document: Green and Sustainable Remediation: A Practical Framework  (GSR-2, 2011)

ASTM Greener Cleanups Guide 5 Published November 2013

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8 15 PM S 12 H YDROS 3 QUESTION SURVEY 2 WEEKS 3 MEETINGS 1 HR EACH

Tools Selection Increasing Tool Complexity and Data Needs

10 Data, Assumptions, Calculations Environmental Impact

11 Option 1 Purchase & Demo Building Option 2 LIF, Excavate Source Area & Monitoring (2 yrs) Option 3 LIF, Dual-Phase Extraction & Monitoring (1 yr post-CA) Environmental Impact Total GHGs In Metric Tons Economic Impact $140,000* Land & Bldg *Assessed Value (2012) $86,300 Market Value (2012) $69,400 $95,000 Social Impact Degree of Difficulty to Implement Degree of Disturbance Difficult High Moderately Difficult Low to High Moderately Difficult Low to Moderate Green and Sustainable Remediation Quantitative Evaluation

12 M EASUREMENT Impact

13 Option 1 Sub-Slab Depressurization And Sanitary Sewer Lining Option 2 Basement Filling And Sanitary Sewer Lining Option 3 Source Area Excavation And Sanitary Sewer Lining Environmental Impact Total GHGs (metric tons) ,007 Economic Impact Costs to-date: $98, $71,100$169,320$345,090 Social Impact Degree of Difficulty to Implement Degree of Disturbance Degree of Stakeholder Preference Low Low Moderate Moderate Moderate to High High High High Low Important Message: The Project Team notes closure is anticipated post corrective action, but is not guaranteed until confirmation indoor air monitoring and other considerations are satisfied. Green and Sustainable Remediation Quantitative Evaluation

14 Sustainable Remediation - Environmental Footprint Summary (SiteWise) PhaseActivities GHG EmissionsTotal Energy Used Accident Risk Fatality Accident Risk Injury metric tonMMBTU Component 1 Consumables E+00NA Transportation-Personnel E+001.9E-051.5E-03 Transportation-Equipment E+007.3E-075.9E-05 Equipment Use and Misc E+010.0E+00 Residual Handling E+00 Sub-Total E E E-03 Component 2 Consumables E+02NA Transportation-Personnel E+001.3E-051.0E-03 Transportation-Equipment E+009.1E-077.3E-05 Equipment Use and Misc E+00 Residual Handling E+00 Sub-Total E E E-03 Component 3 Consumables E+03NA Transportation-Personnel E+001.8E-051.5E-03 Transportation-Equipment E+002.2E-071.8E-05 Equipment Use and Misc E+002.1E-065.4E-04 Residual Handling36, E+021.3E-051.0E-03 Sub-Total37, E E E-03

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16 Toward Sustainability Using Better-Informed Decision-Making And Demonstrable Impacts