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April 21, 2016 <br />ES-3588.01 <br />� ; ��.rth . ; <br />� �oliutions, <br />'' N1Ni� ; <br />Earth Soluiions NW ��c <br />• C�E�otechni�al Engin���eriri�? <br />° {�o!7strUriion Monitorin�; <br />• FnvironmenP.al Scien:.;es <br />Polygon Northwest <br />PO Box 1349 <br />Bellevue, Washington 98009 <br />Attention: Ms. Michelle Dittman <br />Subject: Final Report — Building 4 <br />Construction Moni#oring and Consulting Services <br />Silver Lake Center <br />2001, 2003, 2005, 2007 & 2009 —113th Place Southeast <br />Everett, Washington <br />City of Everett Permits C1411-023, C1411-Q22, C1411-021, C1411-020, & <br />C1411-019 <br />Dear Ms. Dittman: <br />In accordance with your request, Earth Solutions NW, LLC (ESNW} �rovided construction <br />monitoring and consulting services at the subject site. Our services included providing onsite <br />observations and testing on a part-time from December 2, 2015 to January 4, 2016. Our <br />representatives made four site visits to observe and test the buiiding foundation subgrade, and <br />structural fill. <br />Our representative observed building foundation subgrade to be dense and suitable for support <br />of the proposed structure. <br />Dur representative conducted five field density tests in accardance with ASTM Test <br />Designation D2922 (Nuclear Gauge Method). One representative soil sample was returned ta <br />our laboratory for analysis of the maximum dry density and optimum moisture content in <br />accordance with ASTM D1557-02 (Modified Proctor). Density test results indicate adequate <br />compaction of at least 95 percent at the tested locations of the building slab backfil(. <br />Based on our observations and testing, the earthwork construction was accomplished in <br />accordance with the project plans and our geotechnical recommendations. <br />�13t�5 _ �liiitf�i I'I l:.0 1�,'.E:, S�.�iie ��('1 ° 't�r'llr,',�e, l'1�� y(;(i:).`� � ��;; , `y._2.%LI,i � fAX!°15J `t'li3-�}?'I I <br />