1004 BROADWAY EVCC STUDENT HOUSING - PUBLIC WORKS 2017-01-13

Geoteclu�ical Report - Revised Proposed Apartments: 1002, 1006, and 1008 Broadway Sh�eet, Cverett, Washington May 12, 2015 sliding resistance developed between the concrete and the subgrade soil. Passive soil resistance may be calculated using an equivalent tluid weiglit of 350 pcf, asslnning foundations are backfilled with structural fi1L The above values include a factor of safety of 1.5. Unless covered by pavements or slabs, the passive resistance in the upper 12 inches of soil sliould be neglected. 4.2.2 Peri�netcr Footi�:g D�•ains Footing drains should be installed around the perimeter of the building, at or just below the invert of the footings. Under no circumstances should roof downspout dcain lines be connected to the footing drain systems. Roof downspouts must be separately tightlined to appropriate discharge locations. Cleanouts should be installed at strategic locations to allow for periodic maintenance of tlie footing drain and downspout tightline systems. 4.2.3 Footi»g Srrbg�•ade Preparation All footing subgrade should be properly prepared and in a dense condition prior to setting foi7ns and placing reinfoccing steel. Any loose or softened soil should be removed from the footing excavations. The �dequacy of the footing subgrade soits should be veritied by a representative of PanGEO, prior to placing foi-�ns or rebar. 4.3 FLoous S�nBs The floor slabs for the proposed building may be constiucted using conventional concrete slab-on-grade i7oor construction. The floor slab should be supported on competent native soil or on structural fill. Any over-excavations, if needed, should be backfilled with shuctural fill. Intei•ior concrete slab-on-grade floors sllould be underlain by 1 capillary bc•eak consisting of �t least of 4 inches of pea gravel or compacted '/-inch, clean crushed rock (less than 3 percent fi�ies). The capillary break material should meet the bradational ►•eyuii•ements provided in Table 2, below. Tablc 2— Capillary Brcak Grndation Sieve Size Yercent Passing '/-inch 100 No. 4 0— ]0 IS-p�8 100113mndw;p'. Rcvised 1�21�'C % 1'eil�i��i�, �I1C.