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t.r <br /> 4. Provide paper copies of the survey control drawing for project. <br /> Task 6— Geotechnical Study <br /> This task will execute a geotechnical study for the identified site for the design and <br /> construction of the new station and related underground utilities and site improvements. <br /> Perform field investigations (borings), laboratory analysis and technical evaluations. The <br /> geotechnical study will be performed by MSA's geotechnical subconsultant, GeoEngineers, <br /> Inc. and include the following subtasks. <br /> MSA/GeoEngineers Responsibilities: <br /> 1. Review previous geologic and subsurface information. <br /> 2. Plan the exploration program based on the preferred lift station alternative and obtain <br /> permits <br /> 3. Explore subsurface soil and groundwater conditions at the site by drilling two (2) <br /> borings to a depth of at least 50 feet. The field explorations will be completed under <br /> the direction of a geotechnical engineer or geologist who will maintain a detailed log <br /> of each exploration and obtain samples of the various materials encountered. The <br /> samples will be collected for additional examination and analysis, as necessary, for <br /> development of our recommendations. <br /> 4. Install a piezometer in one of the borings for subsequent groundwater monitoring. <br /> The piezometer will consist of 1-inch diameter PVC with a flush steel monument <br /> cover. Groundwater levels will be obtained for up to one year after installation <br /> 5. Perform laboratory tests on representative samples of the soils, including tests for <br /> moisture content, density, and particle size distribution. Based on the subsurface soil <br /> conditions encountered in the borings, triaxial strength tests may also be completed. <br /> 6. Through engineering studies and analyses, conclusions and recommendations will be <br /> formulated concerning: <br /> a. Detailed descriptions of the soil and groundwater conditions encountered at <br /> each boring location, including the presence and effect of any existing fill <br /> material or unsuitable soil conditions, as appropriate. <br /> b. Trenching and temporary excavation techniques; including shoring, temporary <br /> slopes, and pipe support. <br /> c. Discussion of geologic and seismic hazards associated with the site, including <br /> recommended mitigation measures, if needed. <br /> 37 <br /> City of Everett MURRAY,SMITH&ASSOCIATES,INC. LS 24 Predesign <br /> August 2007 Engineers/Planners 13 <br /> F:\BD\Clients\Everett,WA\Lift Station No.24lPre-DesigntScope of Work Revised 8-6-07.doc <br />