770 NORTH HALSTED STREET

The mid-rise buildings located at 770 North Halsted Street date back to 1925, at which time they were used for the manufacturing of coatings and other chemicals, and were host to multiple underground storage tanks.

Carlson was retained to conduct additional Phase II environmental site investigations in anticipation of a property transaction and was then later tasked with obtaining a No Further Remediation letter through the Illinois Environmental Protection Agency’s (IEPA’s) Site Remediation Program.  Carlson completed soil, groundwater, and soil gas investigations and identified both inorganic and organic contaminants.

Limited access to impacted material beneath a basement and in an enclosed courtyard prompted the evaluation of in situ stabilization of metals-impacted soils.  Long term testing of in situ stabilization of the metals using lime kiln dust confirmed this approach was unsatisfactory; as a result, Carlson successfully made a case for impractical remediation under the Tier 3 provisions of the IEPA’s Tiered Approach to Corrective Action Objectives regulations, and the Agency agreed to allow the impacted material to remain in place.

Our site closure strategy also included minimizing our Client’s reporting burden by applying an alternative Tier 3 model which better described the site conditions and which dramatically reduced the predicted lateral migration distance of potential groundwater impacts resulting in a substantially smaller number of parties requiring neighbor notification.