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Geotechnical Engineering Report-Revised lrerracon <br /> Kaiser Everett Medical Center Everett,Washington -- s--- y� <br /> December 18, 2019 Terracon Project No. 81195071 GeoReport <br /> Existing Fill <br /> As noted in Geotechnical Characterization, existing fill was potentially encountered to depths <br /> ranging from about 3 to 8 feet. Support of pavements, on or above existing fill soils, is discussed <br /> in this report. However, even with the recommended construction procedures, there is inherent <br /> risk for the owner that compressible fill or unsuitable material, within or buried by the fill will, not <br /> be discovered. This risk of unforeseen conditions cannot be eliminated without completely <br /> removing the existing fill but can be reduced by following the recommendations contained in this <br /> report. A Geotechnical Engineer can assist in identifying existing fill during construction. <br /> If the owner elects to construct pavements on the existing fill, the following protocol should be <br /> followed. Once the planned subgrade elevation has been reached the entire pavement area <br /> should be proofrolled. Areas of soft or otherwise unsuitable material should be undercut and <br /> replaced with either new structural fill or suitable, existing on-site materials. <br /> Fill Material Types <br /> Fill required to achieve design grade should be classified as structural fill and general fill. <br /> Structural fill is material used below, or within 10 feet of structures, pavements or constructed <br /> slopes. General fill is material used to achieve grade outside of these areas. Earthen materials <br /> used for structural and general fill should meet the following material property requirements: <br /> Fill Type Recommended Materials Acceptable Location for <br /> Placement <br /> 9-03.9(1) Ballast <br /> 9-03.9(3) Crushed Surfacing Base Course <br /> Beneath and adjacent to <br /> Granular 9-03.12(1)A Gravel Backfill for Foundations Class A' structural slabs,foundations, <br /> and pavement subgrades <br /> 9-03.14(1) Gravel Borrow <br /> On-site Soils (i.e. Stratum 2, 3) <br /> Section 9-03.14(3) Common Borrow' Grade filling, utility trench <br /> General Fill backfill outside the building <br /> On-site Soils (i.e. Stratum 1, 2, 3)2,3 foundation and apertures <br /> Responsive ■ Resourceful ■ Reliable 7 <br />