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February 9, 2016 <br />ES-3588.01 <br />'� Ear,th '. <br />� ` Solutions <br />` NW«� <br />��:� . ����w_ <br />Earth Salutic�ns NW c.�C <br />a Geotechnical Enkineerin�; <br />° COsi,truc:i:ion Monitoring <br />• Fnvironmental S.r.ier�r_r�s <br />Polygon Northwest <br />PO Box 1349 <br />Bellevue, Washington 9$009 <br />Attention: Mr. Thomas Heinz <br />������°��: �is��l 6������fi — ���€Oc��r�� '�7, �.�s��, '@7.'� ��s� 17,� <br />Construction Moni#oring and Consulting Services <br />Silver Lake Center <br />2024 and 2026 —112`" Place Southeast <br />Everett, Washington <br />City of Everett Permits C� 411-038 and C9 505-005 <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 July 31, 2015. Our representatives <br />made three site visits to observe or test building foundation subgrade and building slab backfill. <br />Our representative observed building foundation subgrade to be dense and suitable for support <br />of the proposed structure. <br />Our representative conducted two field density tests in accordance with ASTM Test <br />Designation D2922 (Nuclear Gauge Method). One represerotative soil samples were returnc� <br />to our laboratory for analysis of the maximum dry density and optirr�um moisture content in <br />accordance with ASTM D1557-02 (Modified Proctor). Density test results indicate adequafie <br />compaction of at least 95 percent at the tested locations of the building s(ab backfilf. <br />Based on our abservations and testing, the earthwork construction was accompfished i� <br />accordance with the project pfans and our geotechnical recommendations. <br />1Y05 - [3{idt ('l�tce. N.E, 5�:,t� it.11 8r',itt,ur•, 11:'� `)SO05 ° '4 �:�) -,�.�)--�7O-1 • FAX ('.'�i 4 �9-4; 11 <br />;� a <br />:\ <br />��� <br />