2222 EVERETT AVE 2016-01-01 MF Import

Subsurfuce Erpinration, Gealogic Hruard, and Bverett Sd7ool Disrrict Mnirrtenance Facility Prelimrnnry Georechnical Engineering Report Eve�ett. WnshiuGton � Desirn Recommendnrrons � -- third may be uscd for short-term wind or seismic loading. Perimeter footings should be buried at least 18 inches into the surrounding soil for frost protection and interior footings require only 12 inches of burial. No footing should be founded in or directly above loose, organic, or existing fill soils. All footings should have a minimum width of 24 incaes. It should be noted that the area bounded by lines extending downward at IH:1V from any footing must not intersect another footing or intersect a tilled area which has not been compacted to at least 95 percent of ASTM:D 1557. In addition, a I.SH:1V line extending down from any footing must not daylight as sloughing or raveling may eventually undermine the footing. "1'hus, footings should not be placed near the top cdee of steps or cuts in the bearing soils. Anticipated total setdement of footings founded direcdy on piling, the glaciolacustrine soils, or approved strucmral fill atop the glaciolacustrine soils should be on the order of 1 inch with differential se[dements on the order of � inch. Anticipated settlement of footings founded on a new 3-foot thick structural fill pad should be on the order of I to 2 inches. Diswrbed soil not removed from footing excavations prior to footing placement could result in increa;ed setdements. AESI should inspect all footine areas prior to placing concrete, to verify that the Jesign hearing capaciry of the soils has been auained and that construction couforms to thc recommendations contained in this report. 7'he Ciry of Everett may require these inspectiuns. Pcrimeter footing drains should be provided as discussed under the section on Drai�rage Cnnsiderutrons. C � 10.2 Pile Suppor� Where die loa�s are moderate to high and/or the buildings can tolrra�c litde to no differential setdement, the building can also be placed on piling that extends a minimum of 5 feet into the underlying glaciolacustrine suils. The piling should consist of drilled piers or augercast piling as opposed to �•ibration-intensive driven piles. We are available to provide pier or pile design recommendatiuns if this option is selected. 11A Lr�TGRAL �NALL PRC-SSURES All backfill behind walls should be placed as per our recommendations for structural fill and as described in this section of the report. Horizontally backfilled walls, which are free to yield laterally at least O. l percent of dieir height, may be designed using an equivalent tluid equalto 35 pounds per cubic foot (pc�. Fully restrained, horizontally backfilled rigid walls, which cannot yield, should be dcsigned for an equivalent fluid of 50 pcf. ( �� • 2�� ASSOCI.4TED F11RTH SC/ENCES, lNC. /OCida-KEOIOSI.�r�n�„r�,�,�l.o,_w,e• Page 11 � �