6.B.(2) Proposal for Phase I Environmental Assessment

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or reporting activity. However, we note that there were essentially no requirements for registration, UST closure documentation or collection of environmental samples as confirmation of "clean closure" during the time period which the station operated. Without any form of closure documentation available to PES, the historical presence of the gasoline service station was considered a Historical Recognized Environmental Condition. Accordingly, a subsurface assessment involving the collection and analysis of soil and/or groundwater samples was recommended to determine the extent to which, if any, environmental impact as a result of the historical gasoline service station operations has occurred. Also identified as Historical Recognized Environmental Conditions associated with the former service station operation were potential use of petroleum and/or hazardous substances (facility also performed automotive maintenance) and associated disposal practices, as well historical use of below ground hydraulic lifts. However, observations made during a 1995 Geotechnical Soils Investigation (Shilts Graves & Associates) indicated that the hydraulic lift systems were removed from the ground (based upon visual observations of the former service bay floor slab). It remains unknown as to whether environmental contamination as a result of hydraulic lift system operation occurred. To date, PES nor the City of South Bend, have been able to obtain information regarding the "Site Plan" for development as a gasoline service station, which would indicate a location of the UST systems, hydraulic lifts and other features of the operation. Prior to initiating any on-site assessment activities, PES will contact the "Building Department" to determine if any construction plans for obtaining a Building Permit were filed. PRPOSED SCOPE OF SERVICES Phifer Environmental Services, LLC is pleased to provide the following Scope of Services for performing the environmental consulting with respect to a Phase II Environmental Assessment of the subject site: Task 1-Ground Penetrating Radar Survey As previously indicated, the history of the subject site indicates that from at least 1968 through 1975 the site operated as a gasoline service station, for which there are no records of "closure". The first stage in assessing the subject site will be the determination as to whether the UST systems were removed from the ground or closed in place. In order to do so, PES recommends that a Ground Penetrating Radar Survey be undertaken to identify the former UST tankpit location (assuming USTs were removed) based upon placement of fill materials, determine if the UST remain at the site (closed in place), and potentially establish the layout of dispensers and associated feed lines. In addition, the GPR survey will also identify the location/presence of any on-site utility lines. Ground Penetrating Radar (GPR) offers the means to detect buried objects that are not otherwise detectable. In addition to the ability to locate metal objects (i.e., underground storage tanks, drums), GPR is able to detect non-metallic objects. The system, when operated, sends radar pulses into the surface, receives, and processes the reflected energy. Through advanced processing technology, the system calibrates the di-electric constant of the surrounding material. When the signal is reflected from the material having a different di-electric constant, the signal is displayed on the screen as an