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Proposed Modification to the Residence of Joel 8 Kathy Larsen February 12, 2004 <br />Everett, Washinglon ORA Project Number: 04-065-Report 1 <br />may need to be drawn down locally to a depth sever: '`eet below the desired level over <br />the area. A qualified groundwater hydrologist must design the dewatering system. <br />Due to the presence of Silty SAND below the water table, it may be� necessary to install <br />a temporary dewatering system if a permanent, gravity system is used to permanently <br />dewater the site. The designers should consider the affect of lowe; ing the groundwater <br />on surrounding properties. <br />6.7 Construction Observation and Testing <br />The recommendations presented in this report rely on adequate observation and testing <br />of construction materials and procedures by the geotechnical engineer or his qualified <br />representative. At a minimum, the testing program should include: <br />. Observation and review of site clearing and review of all foundation <br />excavations to evaluate whether actual conditions are consistent with those <br />encountered during exploration. <br />• Observation and testing of placement and compaction of all fill and backfill <br />materials to evaluate compliance with specifications. <br />. Full-time moniroring during the install�tion and load testing of piles. <br />. Field inspection and laboratory testing of materials and field inspection of <br />methods as required by the appropriate Uniform Building Code. Typically, this <br />includes inspection of placement of reinforcing steel; inspection and testing of <br />portland cement concrete to evaluate compliance with specifications <br />regarding slump, temperature, air content, and strength. <br />7. REPORT LIMITATIONS <br />The recommendations presented in this report are for the exclusive use of Joel and <br />Kathy Larsen for the proposed modificaiions to the residence at 832 Rucker Avenue in <br />Everett, Washington. The recommendations are based on the available subsurface <br />information obtained by Otto Rosenau & Associates, Inc. and on design details for the <br />Otto Rosenau & Associates, Inc. Page 12 of 13 <br />i 5/a.7 <br />