2222 EVERETT AVE 2016-01-01 MF Import

Subs�vjncc Erploration, Gcologic Nrkard, and Everett Sclroo!District Mniatrnunce Fnciliry Preliminary Geoteci+nica!Engineering Report Everett, Washingmn Design Recommendations The conclusions and recommenda[ions presenred in this report �re based on the exploration borings compieted for this swdy. The number, location, and depth of the explorations were complered within site constraints. Bccause of the nature of e�ploratory work below ground, extrapolation of subsurface conditions between field explorations is necessary. It should be ❑oted that differing suUsurface conditions may sometimes be present duc to the random nature of deposition and the alteration of topography by past grading and/or filling. The nature and extent oF any variations benveen �he field explurations may not become Cully evide�it until construction. If variations are observed at tl�at time, it may be necessary to re-evaluate specific recommendations in this report and make appropriate cha�ges. 3.1 Exploration Pits Seven exploration pits were completed by a subcontracted backhoe. All of the pits �vere excavated to approximately 13 feet below die existing surface. During the excavating, samples were obtained uf each distinct soil type in eacn pit. The samples obtained from the pits were classified in the field and representative portions placed in watertight containers. 'i'he samples were then transponcd to our laboratory for further visual classificatiun and geotechnical laboratory testing, as necessary. The pits were condnuously observed and logged by an engineering geologist from our firm. The exploration logs presented in the Appcndix are based on the tield logs, excavat;•�� rates and action, atid inspection of[hc samples secured. \ 4.0 SUBSU;FAC� CONDITIONS Subsurface conditions at the project site were inferred from dic 5eld explorations accomplished for d�is snidy, visual reconnaissance of the site, and a revie�v of applicciblc �cologic literature. As shown on the ticld logs, the exploration pits generally encountered loose to medium dense fill overlying a deposit cousisting of stiff to very stiff�laciolacustrine silt and medium dense to dense glaciolacustrine silty sand. The following section presents more detailed subsurface information organire� from the upper (youngest) to the lower (oldest) material and sediment types. 4.1 Strati�raphv Fill Fill soils were encountered in a(I seven cxploration pits excavated at the site. The fill was between 6 to 10 fcet dcep. Generally, fill in the north half of the site was a medium dense silty sand wiQi litde gravcl and trace amounts of cobbles and organics. This fill is interpreted to bc derived from till soils. The fill encountered in d�e east side of the south h:ilf of the site ,vas variable in nature and ranged From medium dense silry sand to debris luden silts and loosc C ��' Z�f .iSSOClATED FIIRTN SCIENCES, GVC. lOC.'da-Af01051Al-D:Iwplb�it-0/-N7x Page 3 �\ �../