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(20 NTI <br />NORTHERN <br />TECHNOLOGIES, WC. <br />January 14, 2016 <br />1408 Northland Drive, Suite 1D7 <br />Mendota Heights, MN 55120 <br />P:7B2.423.9175 F:651.3B9.419❑ <br />www.NTlgeo.com <br />Bolton & Menk, Inc. <br />Attention: Kevin Kielb, P.E. <br />2035 County Road D East, Suite B <br />Maplewood, MN 55109 <br />Subject: Geotechnical Exploration and Engineering Review <br />Riverdale Drive Improvement Project <br />Ramsey, Minnesota <br />NTI Project No. 15.61197.100 <br />Unearthing confidenceTM <br />Northern Technologies, Inc. (NTI) has completed a total of 5 soil borings for the Riverdale Drive <br />reconstruction project in Ramsey, Minnesota. The scope of services included determining existing <br />subsurface conditions and providing recommendations for site preparation, excavations, engineered fill <br />and compaction, depths of unsuitable soils to be removed, ground water management and potential <br />difficulties during construction. Our services were performed in accordance with our proposal dated <br />November 15, 2015. <br />PROJECT AND SITE DESCRIPTION <br />The proposed project consists of the construction of Riverdale Drive between Traprock Street Northwest <br />and Ramsey Boulevard in the City of Ramsey, Minnesota. NTI assumes that the proposed project may <br />include below grade utility improvements, minor grade changes and the construction of an asphalt <br />surfaced roadway. <br />NTI was not aware of invert elevations or other design details of the proposed utilities at the time this <br />report was prepared. <br />SUBSURFACE EXPLORATION SUMMARY <br />NTI performed the subsurface exploration program on December 21, 2015 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 />Precision Expertise Geotechnical • Materials <br />rnRGO LBISMARCK • GRAND FORKS MINOT • MENDOTA HEIGHTS • RAMSEY • ST• CLOUD <br />