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City of Ramsey Project B1700969 March XX, 2017 Page 11 G. Conclusions Based on the results of this assessment, the following conclusions are provided: • With the exception of concrete debris observed in borings S-3, S-4, S-6, and a piece of coal in boring S-3, evidence of potential environmental impacts were not observed. • The sampling and testing conducted as part of this Phase II ESA did not detect chemicals of concern at concentrations greater than MPCA cleanup levels or Unregulated Fill Criteria'. However, based on the history of the Site and the Site's status as a closed leaking petroleum storage tank site, it is likely that petroleum impacted soil is present in places at the Site. Based on the lack of detected soil impacts and the relatively low concentrations of DRO identified in groundwater, any soil contamination is likely to be limited in magnitude and extent. • Groundwater is impacted by DRO at concentrations greater than its MDH HBV. Based on the Site's association with several former leaking petroleum storage tank cases, and the absence of detected contamination during the recent tank removal activities, the identified groundwater impacts are likely due to a historical petroleum release. • Soil vapor is not impacted at concentrations greater than Industrial ISVs. However, based on the presence of detectable concentrations of PCE in soil vapor sample SG-2, it appears that a source of the vapor may be present in the vicinity of the collected sample. Based on the relatively low concentration, the release is either small and/or SG-2 is on the edge of a vapor plume. The other two soil vapor samples, SG-1 and SG-3, did not exhibit detectable concentrations of PCE, indicating that the Site is not significantly impacted by PCE vapors. Best Management Practices for the Off -Site Reuse of Unregulated Fill, dated February 2012, prepared by the Minnesota Pollution Control Agency. BRAUN INTERTEC