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GEOTECHNICAL ENGINEERING SCOPE OF WORK <br /> PRELIMINARY DESIGN <br /> LIFT STATION No. 24 REPLACEMENT PROJECT <br /> CITY OF EVERETT,WASHINGTON <br /> GEOENGINEERS JOB No.0661-068-00 <br /> INTRODUCTION AND BACKGROUND <br /> GeoEngineers, Inc. is pleased to present our scope and fee estimate for preliminary geotechnical <br /> engineering services for the proposed Lift Station No. 24 Replacement Project in Everett, Washington. <br /> Our scope is based on our discussions with Thomas Perry and Caroline Sullivan of Murray Smith & <br /> Associates,Inc.,our experience on similar lift station projects, and a brief site visit. <br /> Lift Station No. 24 is located at the east end of 120th Street SE and immediately west of the I-5 corridor. <br /> The interurban trail and a wooded area separate the lift station from the I-5 corridor. Residential <br /> properties are located north and south of the site, although the north property is currently being <br /> re-developed. We understand that the new station capacity is to be approximately the same as the existing <br /> capacity of 3,500 gallons per minute or as otherwise determined by the preliminary design effort. The <br /> plan recommends that the new station be in service in the year 2010. <br /> Critical geotechnical aspects of the project include foundation and below grade wall design for the <br /> replacement lift station, settlement or uplift concerns, construction of temporary cut slopes and shoring <br /> systems,control of ground water during excavation, and the placement and compaction of backfill. <br /> SCOPE OF SERVICES <br /> The purpose of our services is to evaluate subsurface soil and groundwater conditions as a basis for <br /> providing geotechnical engineering design recommendations for preliminary design of the lift station. <br /> Our proposed scope of services will consist of the following tasks: <br /> 1. Review previous geologic and subsurface information. <br /> 2. Plan the exploration program based on the preferred lift station altemative and obtain permits <br /> 3. Explore subsurface soil and groundwater conditions at the site by drilling two (2) borings to a <br /> depth of at least 50 feet. The field explorations will be completed under the direction of a <br /> geotechnical engineer or geologist who will maintain a detailed log of each exploration and <br /> obtain samples of the various materials encountered. The samples will be collected for additional <br /> examination and analysis,as necessary, for development of our recommendations. <br /> 4. Install a piezometer in one of the borings for subsequent groundwater monitoring. The <br /> piezometer will consist of 1-inch diameter PVC with a flush steel monument cover. Groundwater <br /> 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 moisture <br /> content, density, and particle size distribution. Based on the subsurface soil conditions <br /> encountered in the borings,triaxial strength tests may also be completed. <br /> 6. Through engineering studies and analyses, conclusions and recommendations will be formulated <br /> concerning: <br /> a. Detailed descriptions of the soil and groundwater conditions encountered at each boring <br /> location, including the presence and effect of any existing fill material or unsuitable soil <br /> conditions,as appropriate. <br /> 4 5 <br /> File No.0661-068-00 <br /> GEOENGINEERS_G <br />