10117 EVERGREEN WAY Geotech Report 2018-01-02 MF Import

�� DAVID L. NELSON AND ASSOCIAT[5, INC. Cunsulling liry;inccring(�rnlugy September 28, 1984 Project No. 7884 Page six Alternate foundation support within this area could consist oS I drilled piers which penetrate the dense glacial soils . We would expect penetr,ation of approximately 12' to 17' below � existing grade to a�hieve pier loads of 12 to 1$ tons per pier. I Due to the existance of ground water within this area, poured in place piers may :not be acceptable unless performed in the I normally drier periods of the yearo Auger cast-in-place piles ma,y 'oe necessary to maintain an adequate pile diameter. The minimum pier/pile diameter recommended is 12 .inches. Interior slabs-on-grade would be required to be either piled with the structure or allowed to '£loat' independantly of the pier/pile supported structure . Long term settlement of fl•oa¢ing slab areas is expected. Adequate drainaga should be performed around the structure areas. We suggest the use of foundation and roof drain systems, indepen- dantly directed into the main storm dx•ain system. We suggest . the foundation drain scheme shown on the enclosed Subdrain and Backfill Scheme be utilized for all structures plaoed on shallow foundations with interior slabs-on-�rade . � Pavement Sections Site area development for the parking and access driveway areas � should anticipate adequate pavement sections due to the fine I grained nature of the on-site soils. � I During the noi�cnally drier periods of the year, we suggest that ' the pavement areas be cleared of all sur�icial organic material � and proofrollecl to determine if any soft spots occur. These should be removed a.nd replaced with suitable granular struc+.ural fill. Subsequent t;o proofrolling, a minimum 6" thick �ubbase of granular structural fill should be placed and compacted. F� minimum 4" 1;hick base of crushed rock should then be placed priar to placement of a minimum 2" thick asphaltic concrete surfacing. . ' I. i ' I I