3210 36TH PL NE 2018-01-02 MF Import

APPENDIX A FIELD EXPLORATIONS � GENERA! Subsurlace conditions were explored at Ih� site Uy advancing one borine, exca�a[ing six test pits, and b}' � completing ten conc penetration tcsts (CPTs). The locations oC thc explorations �vcre sun°ayed by Du��id � Gvans & Associates and are shown on the Site Plan, Figure 2. SOIL BORINGS Thc soil boring was drilled using a truck-mountcd Mobilc Q-Gl drill rig providcd and operatcd b} Holocenc Drilling on May 4, 200G. The boring ��as advanced approximately 99'/ feet below the existint ground surface. The boring was continuously munitored by a gcologist fram our firm �vho examined and classified the soils encountcred, obtained representative soil samples, observed groundwater conditions, and prepared a detailed log of thc boring. Soils �vere visually classified in general accordance «�ith �� ASTl�1 D 2488, which is described in Pigurc A-L A key to the boring log symbols is shown in ['igure A-l. The samples �cere obtained using an SY'I' samplcr driven into d�e soil widi a 1�10-puund hammcr. The ' �;amber c�f blo�vs rcquiied to dri��e the sampler the last 12 inches or other indicated distanc�s are rccorded on the bonng log. Thc log of dic boring is presented in Pigurc A-2. The boring log is based an our inteipretation uf the hcld and laboratory data and indicates the varii us tvpes of soils cn�ountered. The log also indicates [he depths at which these soils or their characteristics change; althougii the change might actually be gradu:.l. Tesr Pirs The test pit excsvations were performed using a track-mounted excavator provided by Concrete Nor'wcst on May �, 20CG. The test pits were excavated I6 to l9 feet belo�v the existing ground sur£ace. The test pits were abscrved by a geulogist tiam our fimi who identified the test pit locations, classi6ed the soils encountered, obtained represcntativc soil samples and maintained a detailed log of each test pit. In addition, pertinent infonnalion induding soil sample depths, stratigraphy, groundwatcr seepage and test pit caving were recorded. 'Che soils encountered during excavation operations «ere visually classitied in general accordance with the suil classification system described in Figurc A-l. Representative soil samples were obtained from the test pits, logged, sealed in plastic bags, and transported to our laboratory. The field classitications were further evaluated in our IaUorarory. The lo��s of the test pits are presented in Pigures A-3 to A-3. The test pit explorations were backfillcd with the materials cxcavated fram the test pits. The backfill was placed in Iifts and tampcd to the extcnt practical using the bucket of the excavaror. The backfill at the test p:t locations is not engineered fill and may need to be removed and replaced, depending upon the test pit location and the planned improvements. CONE PENETRATION TESTS �CPT� Subsurface soil conditions �vere also cxplored by completing ten CPT soundings at the site on May 4, 2006. CPT explora[ions CPT-1 through CPT-4 extended approximately l00 feet below the existing ground surface and CPT-5 through CPT-10 were advanced approxima[ely 20 feet belo�v the existing ground surface. Ncrthwest Cone Explorations, Inc. provided cone penetrometer resting s.rvices under subcontract to GcoGngincers. i FilrA�o.99d'7-004-00 PQg�.'1-1 �iEOENGINEF.N� prmGrr ll. 100G