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June 3, 2015 <br />ES-3588.01 <br />, �.� "% <br />• .� �.'��SOIUf101�S <br />Nw«< <br />E�rth Solutians ��'W ��_�, <br />. _�� .... <br />;r ::.... . ... .. .. .. � <br />- ,;.;, , ,, , -,�.: , . , ... . <br />� <br />Polygon NW <br />PO Box 1349 <br />Bellevue, Washington 98009 <br />��e� �ticr�: Mr. ��cfy Stevens <br />Subject: Final Report <br />Building 7, Lots 7.1 thru 7.6, <br />Buifding 8, Lots 8.1 thru 8.4 and <br />Building 19, Lots 19.1 thru 19.8 <br />Construction Monitoring and Consulting Services <br />Silver Lake Center <br />Building 7- 11220 thru 11230 — 19`h Drive Southeast <br />Building 8- 11217 thru 11231 — 19th Drive Southeast <br />Building 19 - 11018 thru 11032 — 20t" Drive Southeast <br />Everett, Washington <br />Dear Mr. Stevens: <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 February 13 to April 27, 2015. Our <br />represenYa�ives r��ade eight site visits to observe building foundation subgrade and test building <br />slab backfill. <br />Our representative observed building foundation subgrade to be dense and suitable for support <br />of the proposed structures. <br />Our representative conducted 24 field density tests in accordance with ASTM Test Designation <br />D2922 (Nuclear Gauge Method). Two representative soif samples were returned to our <br />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 focations of the building slab backfill. <br />8ased on our observations and testing, the earthwork construction was accomplished in <br />accordance with the project plans and our geotechnical recommendations. <br />:� �Y ;,� . : , _ -:�: - „;-t�. . a .. -.. <br />. ,:y�ic�'��:�' <br />Ki <br />: � -. <br />y <br />:::� ;v <br />.; : <br />