Police District Seven
Phase II Environmental Site Assessment

Carnow Conibear was contracted to provide Phase II Environmental Site Assessment (ESA) services at the site located at the proposed Police District 7 site on West 63rd Street in Chicago, Illinois. The site covers approximately five acres. 

Carnow Conibear was contracted to provide Phase II Environmental Site Assessment (ESA) services at the site located at the proposed Police District 7 site on West 63rd Street in Chicago, Illinois. The site covers approximately five acres. The Phase I ESA identified the historical uses of the site as automotive repair facilities, filling stations, and dry cleaning establishments, and the potential presence of underground storage tanks (USTs) on two of the site parcels as the recognized environmental conditions (RECs) associated with the site and recommended a Phase II ESA be performed.
 
The purpose of the Phase II ESA was to determine if the identified RECs identified had impacted the site soil. The Phase II ESA consisted of performing a geophysical survey, performing soil borings, and collecting soil samples from areas of potential contamination. The geophysical survey used electromagnetic equipment to identify metallic anomalies in the subsurface that may be associated with underground storage tanks (USTs). The survey identified three areas where USTs may potentially be located.
                                   
Soil borings were located in areas of known RECs and additional borings were added for general coverage of the overall site. Soil samples were analyzed for the appropriate parameters to address the REC and characterize the site. The soil sample analytical results were compared to the Tier 1 soil remediation objectives (SROs) for industrial/commercial properties and the construction worker scenario.
 
The Phase II ESA detected several constituents at concentrations exceeding the Tier 1 SROs for industrial/commercial properties and the construction worker scenario. Carnow Conibear recommended that site remediation work be incorporated into the site redevelopment design plans and specifications in order to manage impacted soil, prevent site cross-contamination, and minimize the soil volume which may require removal and disposal during the site construction activities, that soils at the site be characterized and properly disposed at an approved licensed landfill (if off-site removal is required as part of future construction activities), and that a site specific safety plan be prepared to protect construction workers during the excavation activities that require handling of impacted soils above the Tier 1 SROs for construction workers. This project was funded by the Public Building Commission of Chicago.
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