Murray, Smith, and Associates, Inc. 2/1/2017

coordinates,north zone, as specified by COE. The vertical datum will be NAVD-88. The topographic survey will be developed as a 1'=20' scale file with one or two foot contours, in accordance with COE standards. • Package and electronically transmit the topographic and boundary survey information to the project team for their use in the site plan and reservoir design. 208.2 Preliminary Geotechnical Engineering- GeoEngineers will provide geotechnical engineering services consisting of subsurface explorations and evaluation of soils and groundwater conditions for the reservoir and site improvements. A more detailed description of services to be performed is provided below. • Review geologic and hydrogeologic references, available groundwater data, and previous geotechnical reports regarding subsurface soil and groundwater conditions. Participate in scoping discussions with MSA and/or the City of Everett, as requested. • Visit the site to complete a geologic reconnaissance of the current site and slope conditions, soil exposures, seepage areas, evaluate near-surface soils with hand tools, and to complete photographic documentation. • Meet with utility representatives and clear boring locations. GeoEngineers will call the One Call Service and also subcontract a private utility locator to aid in locating the borings. • Explore subsurface soil and groundwater conditions at the site by drilling 5 borings with a track drill rig to depths ranging from 15 to 80 feet. GeoEngineers representative will maintain a detailed log of each boring and obtain samples of the various materials encountered. The samples will be returned to GeoEngineers office for additional examination and laboratory testing. GeoEngineers will plan to leave cuttings on site in an area designated by City staff Based on the project understanding, borings are proposed in the following areas: o Two borings within the proposed new reservoir footprint to confirm existing fill characteristics, and the variability of transitional deposits below the foundation considering settlement analyses (estimated 50 to 60 feet each) o One boring in the north portion of the site for trenching recommendations for the new pipe(15 feet) o One boring at the proposed new valve house location (25 feet considering the slope in this area) o One boring at the crest of the steep slope to supplement the previous borings in this area and obtain laboratory data for slope stability analyses (estimated 80 feet) • Evaluate pertinent physical and engineering characteristics of the soils from the results of the field explorations and geotechnical laboratory tests performed on samples obtained from the explorations. Anticipate completing moisture content tests, gradation tests, Atterberg Limits testing, and consolidation testing, as appropriate. • Describe site conditions including detailed subsurface soil conditions encountered based on results of the field explorations and geotechnical laboratory analysis. • Develop a critical cross section for slope stability analyses based on GeoEngineers' review of site conditions, and the results of drilling and laboratory testing. Develop City of Everett MURRAY,SMITH&ASSOCIATES,INC. Replacement of Reservoir 2 January 12,2017 Engineers/Planners Prelim Design Page 10