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Sunwood Drive — Street Improvements <br />Ramsey, Minnesota <br />NTI Project No. 16.61770.100 <br />SUBSURFACE EXPLORATION SUMMARY <br />NTI performed the subsurface exploration program on November 8, 2016 with a two -person crew using <br />a truck -mounted CME-55 drill rig. Samples were generally collected in accordance with ASTM D 1586 <br />"Standard Test Method for Standard Penetration Testing (SPT) and Split -Barrel Sampling of Soils." <br />The boring locations and depths were determined by a representative with the City of Ramsey. The <br />boring locations were staked in the field by NTI. The borings terminated at nominal depths 11.0 feet <br />below the existing pavement surface. . <br />Elevations were not provided to NTI, therefore, NTI has assumed a ground surface elevation of 100.0 <br />feet for each of the boring locations. Please refer to the Boring Location Diagram, the Boring Logs in <br />Appendix C, and the Pavement Core Photographs in Appendix D. <br />Sunwood Drive - (Borings S-1 through S-11) <br />Bituminous pavement thickness in this project area ranged from approximately 4.3 to 8.3 inches at the <br />boring locations. Apparent aggregate base was not observed at the boring locations. Previously placed <br />fill soils, generally consisting of poorly graded sand with silt (SP-SM), were encountered extending to <br />depths ranging from approximately 2.0 to 7.0 feet below the top of pavement. <br />Native alluvial soils consisting of poorly graded sand (SP), silty sand (SM), and poorly graded sand with <br />silt (SP-SM) were generally observed extending to the boring termination depths. Varying amounts of <br />gravel were encountered throughout the boring locations. <br />Groundwater was observed in the boreholes at depths ranging from approximately 7.0 to 9.5 feet below <br />the top of pavement at the time of drilling. Table 1 summarizes the encountered subsurface conditions <br />for these project areas. <br />Page 2 of 7 <br />