Embarking on Concurrent Remediation and Redevelopment – What are the Keys to Success?
Embarking on Concurrent Remediation and Redevelopment:
What are the Keys to Success?
Frank Dombrowski (WEC Energy Group)
Julie Zimdars, P.E. and Graham Fazio (Natural Resource Technology, Inc. (NRT) an OBG Company)
Mr. Frank Dombrowski is a Principal Environmental Consultant with WEC Energy Group and has 32 years of experience in the Environmental industry. He has been with WEC Energy Group for 12 years and is involved in former MGP investigations and remediations, substation retirements, spill response, and property transfers. Prior to this, he worked for 20 years in the environmental consulting field doing risk assessments and risk-benefit analysis.
Planning and implementing concurrent remediation and redevelopment at former MGP sites can be a challenging and labor intensive process. Our recent experience at Wisconsin sites will be shared to provide insights on potential pitfalls and keys to success. While remediation conducted before redevelopment has advantages, it may leave lingering responsibilities and liabilities because of an unclear or modified end use. If redevelopment is imminent, it could be a win-win for the developer and RP if technical and contractual challenges can be overcome. The process may add upfront cost, but the concurrent method can ultimately result in significant savings by eliminating duplicative efforts and provide certainty for regulatory closure and long term liabilities.
Questions that typically require resolution include:
• Will impacted groundwater enter the building foundation drain system post-remediation, and will it require treatment?
• Will there be vapor intrusion concerns that remain following remedial measures, and will a passive or active mitigation system be needed?
• Will the foundation system (e.g., pilings) create preferential pathways for contaminant migration and how will this be addressed?
• What health and safety concerns may be present for construction workers?
Two to three recent case studies of concurrent remediation/redevelopment will be presented. Benefits, challenges and lessons learned will be shared and explanations of how these are being addressed and resolved will be presented. Several key items are needed for a successful project, and should be addressed in contractual agreements executed with the municipality or developer, including:
• Addressing unknowns which could affect the building design, construction activities and schedule, and regulatory decisions concerning post-closure obligations;
• Detailed cost assessment and allocation of construction items that are incremental for the remediation of MGP impacts versus building construction; and,
• Understanding of environmental conditions and whether modifications to the construction methods or sequencing should be considered.