GeoEngineers Inc 10/9/2017 - Laserfiche WebLink

Scope of Services to City of Everett September 25, 2017 Page 2 4. Explore subsurface soil and groundwater conditions by completing up to four borings at the site. The borings will each extend to depths of about 30 to 40 feet and will be completed using truck-mounted drilling equipment. Groundwater piezometers will be constructed in at least two of the borings. We will also explore shallow subsurface soil and groundwater conditions along the toe of slope in at least four locations using hand equipment such as hand augers. The hand augers will extend 1 to 4 feet below the ground surface, and be used in conjunction with the borings. We will prepare an exploration plan for review by the City. • We assume that the City will obtain all necessary permits to complete the borings. We also understand that the City will provide traffic control services needed to complete our drilling services within the roadway right-of-way. • Locate and clear existing utilities at the proposed boring locations. We understand the City will locate utilities along the project area. We will also contact the One Call Utility Locate Service before beginning our explorations. • We will hire an experienced drilling contractor to supply and operate the drilling equipment. Drilling of the borings will be performed under the direction of an engineer or geologist from our firm who will classify the materials encountered, obtain representative samples of the various soils, and develop a detailed log of the explorations. 5. Perform laboratory tests on samples obtained from the borings and hand augers. The laboratory tests may include moisture content determination,Atterberg Limits, and grain size analyses, as appropriate. 6. Evaluate pertinent physical and engineering characteristics of the soils based on the results of the field exploration, laboratory testing and our experience, and provide conclusions and geotechnical recommendations for the following: • summary of subsurface conditions based on our site reconnaissance and field explorations; • slope stability results along two cross-sections, estimated geometry of the failure surface, and mechanism that likely caused the slope movement and distress to the pavement; • mitigation alternatives(at least two)for stabilization of the roadway and underground utilities; • recommendations for storm water and groundwater control; • recommendations for sedimentation and erosion control during and following construction. 7. Provide recommendations for interim stabilization of the slope in areas requiring immediate attention, including support during utility pipe evaluations. We will summarize our interim action recommendations in a letter. Interim action recommendations will likely be provided prior to completing drilling and laboratory testing for the project and prior to issuing our draft geotechnical report. 8. Results of the evaluations will be incorporated into the project's final geotechnical engineering report documenting our services. A draft version will be issued for review and the report will be finalized following receipt of review comments. 9. Provide consultation, project management, and attend meetings, as requested. We anticipate that at least four team meetings requiring our attendance will be completed during design of the project. GeoEngineers,Inc. File No.0661-113-00