1136 GRAND AVE A&B 2016-01-01 MF Import

. . � April 23, 2007 Mr. Scott Anderson L&A Job No. 6A 126 Page 13 7'he subject site is underlain by very-dense and stable fresh till soils of very-high shear strength and high resistance against erosion. 7'hcrefore, geological restraints of the site which may impact the stability of the adjacent steep slope are eithcr nun-existent or can bc minimized to an accep�able Icvcl of risk if thc recommendations in this report are fully implemented and observed. The vegetation cover or thc steep slope should be preserved and not to be disturbed. Site grading, grading of the driveway, and building footprint excavation fot the development of the duplex building will bc achieved with comentional earihwork equipment. If the rccommendations in this report arc followed during grading work, the construction method and technique should have little impact on the stability of thc adjacent stecp slope. Sincc thc drivews; and utility lines will approach the duplex building from the street side away from the adjacer.t stecp slope, driveway construction and utility installation should also have minimal impact on thc stabiliq�of thc adjaccnt stccp slop�. "I'u maintain thc stability of the adjaccnt steep slope, thc dtiplex building to br: constructed on thc site should bc sufficiently setback Gom the crest of the slopc of gradient 40% or more. Based on the above, it is our recommendation that the building should bc set back at Ieast IS feet from the top of adjacent stecp slope. Also, thc footing foundations of the building should be embedded at Icast 12 inches into the underlying, very-dense, fresh till soils. RISK EVALUATION STATEMENT 7�he site is underlain at shallow dcpth by vcry-dense fresh till soils. Thesc soils are of high shear strcn�th in thcir undisturbed native slate and have c�cellent resistance against slope failures. Proper erosion and drainage control is kcy to maintain site stability. It is our judgment that providcd the rccommcndations in this report arc fully implcmented and observed during construction, the arcas disturbcd by construction activitics will bc stabilized and remain stable LIU & ASSOCIATES, INC.