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� � Q99o4-as2 <br /> • Emlrom�nta� <br /> ~�� Gsotechnical <br /> N .Construction <br /> con.�errro•rn�+n.«nw• n..nny <br /> July 2, 1999 <br /> Mr. Rich Wilson Tel: 206/933-4890 <br /> Development Services of America Fax: 206/933-4889 <br /> 4025 Delridge Way SW, Suite 100 <br /> Seattle, Washington 98106-1272 <br /> Re: Report of Geutechnical Design Recommendations <br /> Proposed Warehouse Development <br /> CSR Gravel Pit Site <br /> Hardeson Road <br /> EvereR,Washi�gton <br /> PSI Project No. 745-85001-6 <br /> Dear Mr. Wilson: <br /> At your request, we have prepared this report addressing geotechnical recommendations for the <br /> proposed project. The site greding is currently underway al the site for the proposed 'ouilding and <br /> parking areas. The geotechncial engineer of record for the grading activities is GeoEngineers, Inc. <br /> Recommendations for site preparation and grading are presented in their report dated November <br /> 19, 1998. The information included in the report by GeoEngineers was usecl as the basis (or Ihe <br /> engineering recommendations presented withir this report. <br /> The proposed development is located on a 32- acre parcel within the Associated Sand and Grevel <br /> pit in Everett, Washington. The development will consis� of an approximately 300,OU0 square-foot <br /> warehouse building, extensive paved parking areas, a detention pond, and possible future <br /> expansion area for an office building. The rough grading of the site will be provided by the current <br /> owner and the fill placement will be observed and tested by GeoEngineers. Up ro about 20 feet of <br /> compacted fill will be placed in the building area with the upper 5 feet of the fill compacted ro at <br /> least 95% of the maximum dry density as determined by ASTM 1557. Below ihat upper i feet thF <br /> compaction requirement is 92% o(the maximum dry density as determined by ASTM 1557. <br /> Geotechnical recommendations for design and construction of the proposed development are <br /> presented in ihe (ollowing sections. <br /> Foundations <br /> The proposed building can be supported on conventional spread footing•(oundations, bearing on <br /> compacted fill, as noted above. With the foundation subgrade prepared as described, an allowable <br /> bearing capacity of 2,500 pounds per square foot (psf) can be used for design. We recommend that <br /> continuous footings have a minimum width of 16 inches and individual footings, a minimum width <br /> of 24 inches. All exterior footings shall be placed a minimum of 18 inches below (inish grade. A <br /> one-third increase in allowable bearing capaciry may be used for short-term loads with respect to <br /> seismic or wind effects. We estimate the post�construction settlement will be on the order of 1 <br /> inch, with differential settlements on the order of �'+ inch between adjacent footings. <br /> lnfc�rntrrNou lo (3ni(d O�i ''6 <br /> Pmiessiocal Service Industnes,Inc.•3257 t6th Avenue Wost•Seattle.WA 9Bt 19•Pnone 2062B2�Ofi66•Faa 20F✓262•0710 <br />