AIPG Michigan Section Technical Workshop - Presentation - June 2017
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The document summarizes the remedial investigation and remediation of the former Marysville Power Plant Complex and Greenwood Oil Terminal sites. It discusses the site history, limitations on remediation options, the investigation and planning strategy, remedial investigation activities that identified contaminants of concern, remedy implementation including excavation, and progress toward obtaining no further action status for areas within two years as planned. Final thoughts stress the importance of early research, developing a conceptual site model, focusing the investigation on exposure pathways, anticipating regulatory delays, and involving the regulatory agency from the beginning of the process.
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AIPG Michigan Section Technical Workshop - Presentation - June 2017
- 1. Remedial Investigation and Remediation of the Former Marysville Power Plant Complex AIPG Michigan Section Technical Workshop – Environmental Risk Management June 13, 2017 David B. Warwick Derrick A. Lingle
- 2. • Site History/Setting • Limitations/Prohibitions • Strategy and Planning • Remedial Investigation • Remedy Implementation • No Further Action – Status • Final Thoughts 2 Overview
- 3. Project Partners • Commercial Development Company – Adam Peetz, Project Manager • Envirologic • MDEQ - SE District – Emily Bertolini – Cheryl Wilson • St. Clair County Brownfield Redevelopment Authority 3
- 4. Setting the Stage 4 Add aerial with site boundaries
- 5. 5
- 6. Marysville Power Plant – History/Setting 6 Add site plan, cross section, historical photos, and link to implosion video
- 7. 7 Greenwood Oil Terminal – History/Setting Add historical photos/aerials, site plan, and cross section
- 8. 8 Greenwood Oil Terminal – History/Setting Add historical photos/aerials, site plan, and cross section
- 9. Limitations/Prohibitions • Approved NFAs across both sites within two years of the purchase agreement • No post-closure plans, post-closure obligations, monitoring, or Financial Assurance Mechanisms – Eliminated certain remedial options 9
- 10. Strategy & Planning • Review of existing information – Divestiture Phase II ESA: identified COCs and 11 AOCs – Historic data: aerials, topos, photos, as-built construction drawings, interviews with former employees • Developed Conceptual Site Model – Identified potential exposure pathways – Data gaps • Filed Restrictive Covenants – Groundwater use – Non-residential land use 10
- 11. Strategy & Planning • Developed Response Activity Plan for each AOC – Designed remedial investigation with probable remedies in mind – Informally presented to MDEQ for comment and acceptance • Prepared NFAs as AOCs were addressed 11
- 15. Remedial Investigation • GSI Pathway – Marysville Power Plant 15
- 16. Remedial Investigation • GSI Pathway – Greenwood Oil Terminal 16 Pore Water Sampler
- 17. Remedial Investigation • Direct Contact (both sites)/Off-Site Migration 17
- 18. Remedy Implementation • Excavation – Direct Contact (shallow) 18
- 19. Direct Contact Notification (at depth) Mixing Zone-Based GSI Criterion (FAV - arsenic) Direct Contact Notification (at depth) Site-Specific GSI Criteria Applied 19 Remedy Implementation
- 20. No Further Action – Status • Four NFAs submitted within two-year goal – Two NFAs approved – Two NFAs peer-reviewed – One NFA pending • Further characterization – Additional soil borings at the Greenwood Oil Terminal – ISM at the Marysville Power Plant 20
- 21. Final Thoughts • Do the research early – Aerial photos, site construction drawings, previous investigations, databases, historical information, interviews • Develop that Conceptual Site Model – ID exposure pathways that can be eliminated by Restrictive Covenants – ID applicable clean-up criteria for future land use – Restrict to non-residential • Focus RI on remaining exposure pathways to ID potential remedies • Anticipate regulatory delay • Involve MDEQ from the beginning 21
- 22. Thank You! Dave Warwick, Vice President warwick@envirologic.com Derrick Lingle, Project Manager lingle@envirologic.com 22
- 23. Marysville Power Plant – History/Setting 23
- 24. Marysville Power Plant – History/Setting 24
- 25. Marysville Power Plant – History/Setting 25 Add site plan, cross section, historical photos, and link to implosion video
- 26. 26
- 27. 27 Greenwood Oil Terminal – History/Setting Add historical photos/aerials, site plan, and cross section
- 28. Final Thoughts