LONGMEADOW PARWAY SOIL REMEDIATION

Kane County Department of Transportation designed the Longmeadow Parkway to alleviate traffic congestion from Route 31 to Route 25. In the engineering and surveying for this project, large volumes of contaminated soils impacted by lead and semi-volatile organic compounds were found. The site was then enrolled in the Illinois EPA Site Remediation Program (SRP). BCC was contracted to remediate the site so that final construction of the highway could continue.

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Because the project involved the treatment of hazardous materials, strict adherence to the Resource Conservation and Recovery Act - Area of Contamination Policy was required, along with the development of a Regulated Substances Pre-Construction Plan, and the preparation of a waste profile to the landfill operator.

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The scope of work included:

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• Surveying and dividing the SMZ into eleven 4-ft lifts and 133 excavation treatment grids, organized into 150 CY batches and extending to a total depth of 44 ft

• In-situ stabilization of 57,100 CY of lead-impacted soils

• Post-treatment batch confirmation testing

• Excavation of 37,300 CY of non-special waste

• Transportation and off-site disposal of 94,300 CY of soil to a Subtitle D landfill

• Installation of clay cap

• Consolidation of treated soils and non-special waste

• Site restoration of 23,500 SY by placing topsoil and seed and blanket