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� � . , - Elemen[Ma[erials Technolo� P 651 645 3601 � 662 Cromwell Avenue F 651 659 7348 �lement St Pa��,MN T 888 786 7555 55114-1720 USA Infostpaulaelement.com element.com Mr. David Scott SOIL OBSERVATION 1905 Heritage Drive RESIDENCE—1905 HERITAGE DRIVE Orono, MN 55391 ORONO, MINNESOTA Date: June 25, 2013 Project Number: ESP013890P FIELD OBSERVATION REPORT Subject: Excavation Observation Date of Observation: June 24, 2013 Observation By: Howard Peterson Time: 8:30am Weather: Sunny, 73°F Personnel Contacted: David Scott (Home owner), Carl Tuma, Tuma Excavating Remarks: We were requested to visit the site of a proposed garagelshop addition at the above referenced address. At the time of our observation the mass excavation had been partially done. The south and North wall lines had been excavated approximately 20'to 25'west of the existing basement. The previously placed fill had been removed to approximately 1' to 10' below the planned basement floor. During the excavation a buried tree approximately 18" in diameter was exposed. The exposed soils in the excavation bottom appeared to be competent sandy lean clay in a soft to firm condition. There was also a small area on the new west wall that had been exposed at approximately 10'to 12' below the new basement floor. The exposed soils appeared to be competent sand or sandy lean clay. However, in the three areas mentioned there was not enough oversize provided for the required engineered fill. Carl Tuma asked about using 3" minus material for engineered fill. In our opinion it would be suitable provided it was installed in small lifts. Because of the amount of oversize required and limited working space, we recommended that helical screw piles be considered as an option. If helical piles are used the existing excavation would need to be filled with compacted soil to support the new basement floor. Any new fill should be compacted in thin lifts to a minimum of 95% of Standard Proctor density. .. . ,-_ , REVIEWED BY: Kevin Zalec, P.E. Staff Engineer This report shall not be reproduced,except in full,without pnor permission of Element Matenals Technology. EAR Controlled Data�This document contains technical data whose export and re-exporVretransfer is subject to control by the U.S.Department of Commerce under the Export Administration Ad and the Export Administration Regulations. The Department of Commerce's pnor wntten approval is required for the export or re-export/retransfer of such technical data to any foreign person,foreign entity or foreign organization whether in the United States or abroad.