North Residential District Transformation

THE OHIO STATE UNIVERSITY

Lawhon was contracted by The Ohio State University to perform a fast-track Phase I Environmental Site Assessment (ESA) of fifty one (51) parcels that comprise the North Residential District. As part of this effort, L&A reviewed and analyzed available property records and historical photographs for current and past uses. Federal, state, and local lists of hazardous waste sites were also evaluated to determine if the properties were listed or if any neighboring sites with the potential to impact the sites were listed. City, county & state agencies were contacted for records of problems associated with the sites. Detailed field investigations were also performed to determine if there were any adverse environmental conditions present and to identify any hazardous materials that may be present. L&A also conducted interviews with persons knowledgeable about past and present uses of the subject sites.

At the completion of the Phase I ESA, L&A recommended additional investigation to assess the subsurface for potential environmental impacts due to the presence of abandoned underground storage tanks and the historic use of the subject property and adjacent sites. To evaluate concerns identified during the Phase I ESA, L&A performed a limited Phase II site investigation in eleven (11) areas of concern throughout the North Residential District. The scope of work included the completion of forty-two (42) soil borings to assess the subsurface conditions and a geophysical survey using ground-penetrating radar (GPR) and Electromagnetic (EM) Terrain Conductivity Profiling to determine the presence or former location of USTs and/or fuel lines.

L&A’s investigation identified six potential USTs on the subject property that would need to be removed and tested if encountered during construction activities associated with the North Residential Transformation Project. L&A also recommended that construction plans associated with four areas include a petroleum contaminated soil plan (PCS) based on the detected concentrations of benzene and total petroleum hydrocarbons.