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June 3, 2015 <br />ES-3588.Q1 <br />Polygon NW <br />PO Box 1349 <br />Bellevue, Washington 98009 <br />Attention: IUIr. Eddy Stevens <br />Subject: Final Report <br />Buiiding 5, Lots 5.1 thru 5.7 <br />Building 6, Lots 6.1 thru 6.4 <br />Building 20, Lots 20.1 thru 20.8 <br />k `� :� ✓ <br />`� 3 <br />'�E:€ �,: �p�,�i �i e <br />.�;yr:K4�`,,. <br />G�:'.j.�,+":L" ��.... <br />�,t,:�'.�>�<'�3�. <br />Earth Solutions NW ��c <br />Construction Monitoring and Consulting Services <br />Silver Lake Center <br />Building 5-1904 thru 1928 — 113th Place Southeast <br />Building 6- 1919 thru 1929 —113th Place Southeast <br />Building 20 - 1'1002 thru '110'f6 — 20t" Drive Southeast <br />Everett, Washington <br />Dear Mr. Stevens: <br />� C;eote�_h;iir_al �n;;ineeri�i}; <br />� C:nrsh'ucti�m h�tpniloring <br />� Envir�;nrne;i�al Scierlces <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 January 26 to Apri( 3, 2015. Our representatives <br />made 11 site visits to observe building foundation subgrade and test building slab backfill. <br />Our representative observed building foundation subgrade to be dense and suitable for support <br />af the proposed structures. <br />Our representative conducted 5Q field density tests in accordance with ASTM Test Designation <br />D2922 (Nuclear Gauge Method). Three representative soil 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 (Madified Proctor). Density test results indicate adequate <br />compaction of at least 95 percent af the tested locations of the building slab backfill. <br />Based on our observations and testing, the �arthwork construction was accomplished in <br />accordance with the praject plans and our geotechnical recommeredations. <br />18C5 - "136tn {'I�:ce� �a.t., ju�� : 2O�1 � 6�:' � ,^ �rls,. otS��J.i ° i 415j ��?-�•7(y4 � FP�Y (4�5) �49-4J"I"i <br />r' <br />