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June 3, 2015 <br />ES-3588.Q1 <br />� � Earth <br />5olutions <br />NW«� <br />Earth Solutions NW �_LC <br />° ;::;eotech�,icai ; n;ir,eer�n; <br />• (:��r�struci:�.;n �ti1r�niior;,i� <br />• Envi�;�r�mr-ntal Scicr::.C; <br />Polygon NW <br />PO Box 1349 <br />Bellevue, Washington 98009 <br />Attention: Mr. Eddy Stevens <br />Subject: Final Report <br />Building 7, Lots 7.1 thru 7.6, <br />Building 8, Lots 8.1 thru 8.4 and <br />Buitding 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 — 20th Drive Sautheast <br />Everett, Washington <br />Dear Mr. Stevens: <br />In accordance with your request, Earth Solutions NW, LLC (ESNW) provided construction <br />monitoring and consultinq services at the subject site. Oiir s�rvic�s incl��ded r�rovidjnJ ensii� <br />observaYions and testing on a part-time from February 13 to April 27, 2015. Our <br />representatives made 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 soi! samples were returned to our <br />laboratory for analysis of the maximum dry density and opiimum 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 backfill. <br />Based on our observations and testing, tF�e earthwork construction was accomplished in <br />accordance with the project plans and our geotechnical recommendations. <br />if�fiS 136rh PiatN ti.� , S�n::c� ::l' • C3c�;,:��i�<:�, `:1'; lr.i'11:; ';�>; r<i-=�,'t�.'� Q 1=:1X -4>., #�:S) .'1 <br />r'��.,,��� <br />� <br />