500 LAUREL DR 2016-01-01 MF Import

Geotechnical Engineering Study Page 12 00-2267 Three Story Addition - 500 Laurel Street, Everett January 31, 2001 traffic activity. it should also be clearly understood that a substantial portion of the soils are considered to be "moisture sensitive" and subject to rapid disturbance and deterioration e�•en under light pedestrian traffic when wet. The site is, as mentioned earlier, underlain at relatively shallow depth by a firm and ccmpetent native silty sand and sandy silt soil. FuRhermore, there is no shallew groundwater level bE��eath the sita, and no visible evidence of any localized erosional damage, shallow sloughin3 or deeper seated failure on the site slope or in the immediately surrounding area. Based on our visual site evaluation, and as supported by our geotechnical analyses, it is our professional opinion that the sites' westem slope is stable under both static and dynamic conditions in its existing condition and configuration. It is also our opinion that the site slope should be expected to remain stable in its post construction configuration under static and dynamic conditions fortha reasonable lif�etime oftt�e residence. The distance bet�.�een the closest point of the existing residence to the crest of the existing bluff slope, the bui(dings northwestern comer, is twenty-three (23) feet. If the addition is built as currently intended the distance between the northwestem corner of the addition and the crest of the slope will be twenty-two feet six inches (22' - 6"). Bast� on the firm and competent soils fcund beneath the site it is oi:r professional opinion that this distance is a sufficient setback to preserve the integrity of the structure and avoid disturbing the slope. These and other geotechnical aspects of the project are discussed in m�re detail in the following sections of this report. Site Prea�ration and General carthwork General: Based on our understanding of the proposed site development, it is our opinion that the proposed construction is geotechnically feasible provided tnat our recommendations are carefully followed. It appears that there will be a need for only a minor amount of excavation to create the space for the new addition. The following paragraphs outline the eartnwork measures likely to be involved in site development. I DPmolition: The first step in construction of the proposed addi±�on will be to demolish and �emove a substantial portion uf the low concrete retaining wall that z3