An aerospace manufacturer sought to divest a 47-acre property with soil and groundwater contamination from trichloroethylene (TCE) and other chemicals of concern. To prepare the land for divestment quickly, the company’s remediation and real estate teams needed to understand one another’s goals and reach agreement on a path forward. In addition, the soil needed to be remediated to residential risk-based soil remediation goals (SRGs) to garner the highest sale price. Developing and executing on a cohesive plan quickly was further complicated by public agency regulations with tight deadlines, and a vigilant community. The company engaged Haley & Aldrich to identify the best science to address numerous remediation, stakeholder, and regulatory challenges, and to bring together the disparate parties so they could reduce the company’s liabilities while protecting the environment and community.
Haley & Aldrich staff worked with the remediation, oversight agencies, and real estate stakeholders to create a shared understanding of issues, constraints, timelines, and risks. We identified potential future regulatory, remediation, and schedule impacts, and created supporting risk-based mitigation plans to get ahead of issues that could arise. With all stakeholders we defined an end goal and supporting plan with which all parties were aligned. To remediate and sell the property for residential reuse, the plan ensured that the site remained under a voluntary cleanup action throughout the project. We also secured residential risk-based SRGs and an Environmental Land Use Covenant (ELUC) to address potential exposure risks from VOCs in soil gas and groundwater.
We also recommended and led an investigation of the large factory floor for polychlorinated biphenyls (PCB) contamination, which the client believed was not a contaminant of concern at the site prior to demolition. We identified best management practices for the PCB-impacted materials and ultimately saved the client hundreds of thousands of dollars and significant time.
- Remediated soil to risk-based residential goals.
- Saved hundreds of thousands of dollars by proactively identifying an alternate waste management approach for rainwater.
- Recorded zero safety incidents, OSHA recordables, and time lost to incidents in nearly 10,000 hours worked.
- Saved client hundreds of thousands of dollars more in PCB-impacted building demolition waste.
- Received no comments from the oversight agency on work plans, avoiding rework, schedule delays, and cost overruns
- Utilized customized collection, acquisition, and reporting system to collect field data and reduce time and cost of data management and agency reporting
- Established an ELUC, allowing the site to be redeveloped for residential reuse without remediating VOCs in soil vapor
- Reduced TCE concentrations in groundwater by 30-60% since 2012 using enhanced in-situ bioremediation
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