2030 GRAND AVE 2018-01-01 MF Import

' Subsurface Erploration and '0?6 Grai�d.a venue Geotechnica!Engineering Report ( Everett. IVnsLinemr� Desi¢n Recommendations l 1 7.1 1'��»norarv c�� s�o��s It is anticipated tha[ buiiding ezcavation wiil be close to properry lines. Therefore, temporary I cut slopes will not be feasible alo��g d�e north, south, west, and east property lines. Temporary or permaner.t shoring will b,: necessary to establish desired foundation erades, and protect esisting svuctures and utilitie��. Excavation will likely encounter ground water I seepages at varying depths across d�c site. AESI should be consulted to provide temporary or permanent shoring recommendations once buiiding design plans have been created. I S.0 STRUCTURAL PILL { The placement of strucmral till is not anticipated for this project. However, if the project � dcsign changes or cond�tions warrant, the following recommendations should be followed. All � references to structural fill in this report refer to subgrade preparation, fill type, placement, and compaction of materials as discussed in this section. If a percentage of cumpaction is specitied under another section of this report, the value given in that section should be used. ! Siructural till is defined as non-organic soil, acceptable to the geotechnical eneineer, placed in masimum 8-ind� lease lifls, with each lift being compacted ro at least 95 percent of the � „r�dili.� PfCCIUC :1)1X!IIP1171 C{ensity using ASTM•n 1557 a� the standard. The contractor should note that any proposed fill soils must be evaluared by AESI prior to their I use in tills. This would require that we have a sample of the material d8 hours in advance of tdlin� activities to perf'orm a Proctor test and determine its fiel� compaction standard. Soils in which the amount of fine-graineJ material (smaller than No. 200 sieve) is greater than 1 approximately 5 percent (measured on the minus No. d sieve size) should be considered moisture-sensitive. Use of moisture-sensitive soils in strucmral fills should be limited ro 1 favorable dry �veather and dry subgrade conditiuns. 7'he on-site soils eenerally contained trace to moder,ue anwunts of silt and are considered slightly moisture tolerant. The use of on-site excavated soils for structural till will likely be suitable except during and immediately � following wet weather. ;1 rcpresentative from our firm should inspect the stripped subgrade and be present during � placement of' strucmral till to observe the work and perform a representative number of in- place densiry tests. In this way, the adequacy of the eardiworh may be evaluated as filling progresses, and any pro`�lem areas may be corrected at that time. It is important to understand i ih;.�t taking random compaction tcsts on a part-time basis �vill not assure uniformiq� or � acceptable perfonnance of a fill. As such. �� are a�ailablr to aid d�c o��ner in developine a suitabl� monitoring and testin�, freyuenc)'. ( 1 — �� g ��XJp �ISSOGATED E�''TNSClEA'CES, /NC. � ��xe„-etM�i,x�-tn-rnere-�x�-u_x PageB