PSA - Groundwater Remedy and Quarterly Sampling Plan - Oliver Industrial Park - Hull and Assoc.

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i:.HULL July 25, 2016 Mr. Chris Dressel Brownfield Coordinator City of South Bend Department of Community Investment 227 West Jefferson Blvd., Suite 1400 S South Bend, Indiana 46601 RE: Proposal to Implement a Groundwater Remedy; Conduct Quarterly Groundwater Sampling; and Fulfill Regulatory Requirements at Oliver Industrial Park, South Bend, Indiana (the Site); SBI074.300.0001. Dear Mr. Dressel: Hull & Associates, Inc. (Hull) is pleased to present the City of South Bend Redevelopment Commission (Client) the following proposal to provide professional engineering services for the above referenced project. The purpose of this document is to establish the Scope of Work as we understand it and to - provide a fee schedule for the project. Site Physical Setting and Background The Site is located approximately one mile southwest of downtown South Bend. From 1876 to 1989, activities at the Site included manufacturing of farm machinery and implements. The Site consists of several vacant lots and commercial/light industrial businesses, and is bordered by commercial/industrial properties to the southwest, south, and east of the Site; and an active rail line along the northern boundary of the Site. Residential properties are located across the western and northern boundaries of the Site. The Site is comprised of both vacant developed parcels totaling approximately 14.45 acres (+/-) of land located near the intersection of Chapin Street and Oliver Plow Court in South Bend, Indiana. The Site formerly comprised approximately 36 acres of land, but the City and private entities have redeveloped portions of the Oliver Industrial Park, effectively removing certain parcels of the Site from inclusion in the VRP. Multiple environmental assessments have been conducted at the Site. Soil sampling completed thus for has revealed that benzo(a)pyrene, dibenz(a,h)onthracene, tetrachloroethene, and TPH (historically detected in one location by obsolete method 41 8.1) are the only chemicals of concern (COCs) in soils that historically exceeded their respective VRP Tier II Nonresidential Cleanup Goals. Hull coordinated excavations in May through June 2016 that removed the last of the known COCs in soils at the Site. Soil remediation is now considered complete and a summary report documenting these activities will be submitted to the City in July 2016. Extensive on- and off -Site groundwater testing completed thus far has revealed that tetra chloroethene (PCE), trichloroethene (TCE), and vinyl chloride (VC) are the only COCs in groundwater that exceed their respective VRP Tier II Nonresidential Cleanup Goals or the Indiana Department of Environmental Management's (IDEM's) 2012 Remediation Closure Guide (RCG) Commercial and/or Residential Groundwater Screening Levels. In December 2011, Hull submitted a RWP for the Site that presented a general path forward for additional assessment and remediation pursuant to VRP requirements. In May 2013, IDEM responded with comments to the RWP. The City and Hull responded to IDEM's comments in a letter dated August 1, 2013. That August 1, 2013 letter outlined additional assessment activities that would be initiated by the City, which were subsequently completed. After ongoing correspondence between the City, Hull, and IDEM that corroborated general agreement that the Site was on an acceptable path toward an appropriate groundwater remedy, Hull submitted an amended RWP in December that proposed limited soil excavation and a relatively extensive on -Site groundwater remedy. To date, IDEM has not issued formal approval of 6397 Emerald Parkway, Suite 200 • Dublin, Ohio 43016 614.793.8777 fox 614.793.9070 www.hullinc.com