1920 GRAND AVE 2016-01-01 MF Import

stre srebt►try Our geologic reconnaissance of the site included visual observauons of the surface conditions and the surrounding area. In general,tMe site appears te be stable with no evidence of recent soil movement or deep-seated sliding. 'Ihe vegetation in the area also gives no indication of past instability. � One sign of focmcr instability in the arca is located to the north of the site on the face of the lower slope. On a small section of the slope a surface failure has taken place. It appears the topsoil became samrated and the vegetation was displaced on the slope. It is our opinion that the site is relatively stable in its prcsent condition. The risk of damage to the existing suuctures or to adjacent properties from soil instability during and following constructian will be minimal, subject to the conditions set forth in this eeport,and the proposed constn�ction will not increase the potential for soil movement. Recommendatlons The project will include the excavation of the basement level parking,whicn will extend to a depth of approximately 10 feet below the elevation of the street. Due to the conditions found at that depth and the proximity of the condominium to the top of the slope,we recommend that the westem portion of the foundation of the condominium be suppocted on drilled piers. The remainder of the foundation may be supported upon conventional spread footings. Slte Preparatlon Upon removal of the existing residences, it is our understanding that the anticipated earthwork will consist of excavating to the basement elevation, approximately 10 feet belaw the elevation of the sidewalk and approximately 10 feet west. Building Areas In general, the vegetated areas within the building pad should be stripped prior to the placement of foundations or swctural fdl. The topsoil and vegetation should be removed from the site or stockpiled and used in landscaped areas, if needed. [t is anticipated that the topsoil depth will be six inches. � From the review of the site plan provided, there will be a wt along the � eastem f,uilding line which will extend to a depth of eight to 10 feet below the existing grade. Upon completion of the excavation for the lower level, it is anticipated that the sti(f silts and dense sands will be exposed. This surface should not require any funher preparation prior to the placement of�he footings, unless precipitation during the excavation dismrbs the �� l� PoR Gardner Con�ominiums•CaeofeMnical Report Paye 4