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City of Ramsey <br /> Project 61700969 <br /> March XX,2017 <br /> Page 8 <br /> DRAFT <br /> F. Investigation Results <br /> F.1. Geologic Conditions <br /> Soil boring logs with descriptions of the various soil strata encountered during the soil boring operations <br /> and water level information are contained in Appendix A.The depths shown as changes between the soil <br /> types are approximate.The actual changes may be transitional,and the transition depths are likely to be <br /> horizontally variable. <br /> All soil borings encountered sand from the surface to the terminal depth of the boring.Groundwater was <br /> encountered in borings S-1,S-4,S-6,S-8,and S-9 at depths ranging from 20.49 to 27.36 feet bgs. <br /> F.2. Field Screening <br /> Soil recovered from the soil borings was screened by the field technician for evidence of contamination, <br /> including odors, staining,and the presence of debris. No odors,staining,or debris were observed in the <br /> soils recovered from any of the nine borings,with the exception of concrete debris observed in borings S- <br /> 3,S-4,S-6,and a piece of coal in boring S-3. <br /> Organic vapor/PID readings were recorded for soil samples collected from each borings. Observed <br /> organic vapor concentrations ranged from 0.0 to 1.4 parts per million (ppm),which are considered to be <br /> general background readings. Soil screening PID results are included on the boring logs in Appendix A. <br /> F.3. Soil Analytical Results <br /> A summary of the soil analytical results is provided in Table 1.The complete laboratory reports with <br /> chain-of-custody forms are included in Appendix D. <br /> The soil analytical results can be compared with the Soil Reference Values(SRVs)and Screening Soil <br /> Leaching Values(SLVs)which are also listed on Table 1.SRVs and SLVs are allowable risk-based <br /> contaminant concentrations derived by the Minnesota Pollution Control Agency(MPCA) using risk <br /> assessment methodology, modeling, and risk management policy to guide investigation and cleanup <br /> actions. SRVs relate to direct-contact exposure scenarios and SLVs relate to potential leaching of <br /> contaminants to groundwater. Concentrations of contaminants in soil,SRVs,and SLVs are expressed in <br /> units of milligrams per kilogram (mg/kg). <br /> BRAUN <br /> INTERTEC <br />