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NELSON <br />GEOTECHNICAL <br />ASSOCIATES, INC <br />FIELD REPORT <br />ProjecL• <br />Owner: <br />Location: <br />1731 I 135"� Avc. NE �A-500 WCathCr. <br />Woodinville, WA 98072 PutpoSC of <br />(425)48G-1f69 �AX481-2510 Visit: <br />Nielson Residencc <br />Thom Nielson <br />3606 Mukiltco Boulevard <br />Everett, WA <br />Cloudy,60's <br />Poundation Cvaluation <br />File No.: 795808 <br />Datc: 9/ 18108 <br />Report No: 3 <br />Page: 1 of 2 <br />By: AD <br />We visited the site today at dic request of Thom Niclson to observe and evaluate the foundation <br />subgrade at his sitc located at 3G06 Mukiltco Doulevard in Everett, Washington. <br />Upon arrival, we met with Thom and the on-sitc contractor. Thcy inl'ormed us that thcy over-excavated <br />thc loosc/soft soil from thc eastem and parts of the northem and southem footing lines (see Site Plan). <br />We observed that thc excavation was approximatcly four fcet below the existing ground surface. Thc <br />soil exposed gencrally consisted of gray, silty fine to medium sand with gravel, interpreted to be native <br />soil. We :valuated thc foundation areas by probing with a%z-inch diameter probe rod under moderate <br />pressurc. Most of thc subgrade was penetrated approximatcly '/a to 1 inch. We interpreted it co be <br />dcnse. <br />We observed soft soil within the northern foundation. Wc recommended that these soils be removed to <br />exposc dense soil. We also obscrvcd soft soil with organics, as well as washed rock within the eastem <br />foundation line (sce site pl�n). We recommended that area of rock be removed to be ablc to observe the <br />soil bclow thc rock. Thc soil exposed bclow the rock mainly consisted orange-brown to brown-gray <br />silty sand with gravcl. Most of thc soil probcd approximatcl� '/2 inch, but an arca of an old drain that <br />had been removed was soft and probed approsimately 6 to 8 inches. We recommended that this area be <br />over-excavated and replaced with rock. Thom and the contractor agreed. <br />The contractor informed us that tliey would begin backfilling with 2- to 4-inch nck later in the moming. <br />Thcy askcd if thcy would be able to cap thc rock with 2'/-inch minus rock. �Ye recommended that he <br />cap thc rock spalls with ti to 12 inchcs of 2'/-inch minus rock <br />We recommend that any water-saturated soi; bc removed prior to placing rock spalls. Based on our <br />obscrvations while on sitc, and provided that the small arcas of subgrade are over-excavated to dense <br />matcrial, it is our opinion th�it the evah�ated subgradc should providc adequate support for the planned <br />loads. <br />AttachmcnL• Sitc plan <br />Dislribution: <br />� <br />Signcd: - � <br />, �� <br />3;-, <br />