4717 EVERGREEN WAY 2016-01-01 MF Import

� �y�c t �1 , , ... � ti ei . � � H � � yy ��.. � � z The conclusions and recommcndations presented in this report arc bascd on the 5 exploration � pits completed for this swdy. The number, location, and dcpth of thc explorations were o c o ` completed within site and budgetary constraints. Because of the nature of exploratory work '° y ,ro, �+ below ground, extrapolation of subsudace conditions between field explorations is necessary. � � � It should be notcd that dit(ering subsurface conditions may sometimes be present due to the ' random nature of deposition and the alteration of topography by nast gradmg and/or filling. °z n o �^ The nawre and extent of any variations between the field explorat�ons may not become fully � ;° � evident until construction. If variations are observed at that time, it may be necessary to re- � y � evaluate specific recomr�endati�ns in this report and make appropriate changes. z, �: � y H '- 3.1 Exploration Pits o m � � r �', Exploration pits were excavatcd with a tractor-mounted backhoe. The pits permitled direct, �' visual obsen•ation of subsurface conditions. Materials encountered in lhe exploration pits were y � N studied and classified in the ficld by z ficld geologist from our firm. All explonUon pits were backfilled immediately after examination and logging. Selected samples were then transported to our laboratory for further visual classification and testing, az necessary. 4.Q SUB�TRFACE CONDITIONS Subsudace conditions at the project site were infcrred from the fcld explontions accomplished ' for this study, visual reconnaissance of the site and review �f topography provided on the previously mentioned topographic survey and in applicable gr;ologic literature. As shown on the field logs, the explorauon prts gencrally encountered fill materials overlying natural deposits oi medium dense sands overlymg dense sands. The following section presents more l — detailed subsuriace information. � � � �� 4] Stratieraohv Fill soils (those not namnlly placed) werc encoumered in all of the exploration pits. The fill 1 �� ranged in thickness from a minimum of 2 feet to a maximum of 9 feet in EP-4 and EP-3, �..` • respectively. As noted on lhe exploration ]ogs, the majority of fill consisted of inedium dense i � ' to dense, moist, grey, brown and 1an, fine to medium sand wuh some silt, gravel and organics. These materials appeared to be in a denser condition in the area where vlilmington Avenue ��.� used to be located. This is also the generallocatiun for the proposed building. In the Ir�� proposed parking areas, the upper 1-1/2 to 2 feet of the fill was in a loose to medium dense cond�uon. ' Natural soils beneath the fill materials consisted for the most part of inedium dense, moist, I �� brownish orange, fine ro medium sands with some silt and occas�onal charcoal pieces. With depth, this material became greyer and contained ]ess silt. This material was found to extend to a maximum depth of approx�mately I1 feet below the exi;,ting ground surface in EP-1 and +, �,� EP-3. This matc:ial has been interpreted as recessional outwash sediraents depositcd from I ��,�I . meltwaters dur.ng the retreat oF the last glacial ice front. ; Underlying the recessional soil, and beneath the fill where recessional sediments were absent, � a dense, moist, grey, medium sand was encountered. The rop of this material was cnwuntered ��, between ]0 and 11 fcet decp in EP-1 through EP-3. In E-P-4 and EP-5, a medium dcnse to deuse with depth, fine to medium sand which graded into a fine to coarse sand with some gravel was observed below the fill material. The dense sands noted above have been 3 r •