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February 25, 2016 <br />ES-3588.01 <br />Polygon Northwest <br />PO Box 1349 <br />Bellevue, Washington 98009 <br />Attention: Mr. Thomas Heinz <br />�.; ; . farth _ :. <br />�olu�ions <br />NW«< . ; <br />Ea.rth Solutior�s NW ��� <br />Subject: Final Report— Building 16, Units 16.1 thru 'i6.4 <br />Construction Monitoring and Consulting Services <br />Silver Lake Center <br />2Q20, 2018, 2014, & 2012 —'I 12th Place Southeast <br />Everett, Washington <br />° C;eoter.:hnic:ai Ln�ineering <br />• Constructiar: Monitoring <br />� Environinental'�cience� <br />City of Everett Permits C1411-078, C1411-077, C1411-076, � C141't-75 <br />Dear Mr. Heinz: <br />In accordance with your request, Earth Solutions NW, LLC (ESNW) provided construction <br />monitoring and consulting services at the subject site. Our services included providing onsite <br />observations and testing on a part-time from June 22 to August 3, 2015. Our representatives <br />made four site visits to observe and test the building foundation subgrade. <br />Our representative observed building foundation subgrade to be dense and suitable for suppork <br />of the proposed structure. <br />Our representative conducted four field density tests in accordance with ASTM Test <br />Designatian D2922 (Nuclear Gauge Method). One representative soil sample was returned to <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 o€ at least 95 percent at the tested locations of the building slab backfill. <br />Based on our observations and testing, the earthwork construction was accomplished in <br />accordance with the project plans and our geatechnical recommendations. <br />18O5 - 1"i(ith ('I�i��e� N.E, �uitr.� ZU1 • helle�•ue, Vt/A 9ti(705 "(42:i) 44'�-=:70''- • FAX (�25) 449-?711 <br />Ll��� <br />