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<br />. Perform subsurface'explora\iop c,onsisti~ 6F'iliilling, logging, and sampling of eleven (I I) hollow-stem auger
<br />borings (HAS) to a maximtjm depth gf ~O', below the exisring ground. Represenrative relatively undisrurbed
<br />and bulk soil samples will b~ collected :it ~d.ected depth intervals and rransponed to the laboratory for testing.
<br />Th~ borings will be backfilled w{th nariv~ soil cutrings.
<br />
<br />Performlaborarory testing on sdecred soil samples to determine in-situ dry density and moisture content.
<br />Atterberg Limits.'shear strength, grain size analyses, expansion index, pH, minimum resistivity, chloride, and
<br />sulfate content.
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<br />. Review, evaluation and analysis of the data collected will be performed under the supervision of a registered
<br />Geotechnical Engineer and geologist licensed in the State of California. Analysis will include: Characterization
<br />of earth materials and ground water level; Site seismicity, horizontal peak ground acceleration and UBC
<br />seismic design parameters; Determination of allowable bearing pressure, shallow foundation system and
<br />resistance to lateral loads; Determination of total and differential dynamic settlement estimates for proposed
<br />sound wall and foundations for signal light poles and streetlight poles; Evaluation ofliquefaction potential;
<br />Performing necessary slope stability analyses; Evaluation of corrosion potential of concrete and metal in contact
<br />with onsite soils; Foundation selection and design parameters; Recommendations for new pavement sections
<br />for rehabilitation, widening and utility trenches; Recommendations for grading next to existing structures;
<br />Recommendations for remporary excavations, cuts and fills, and utility trench backfill; and development of
<br />earthwork and grading specifications.
<br />
<br />. Preparation of a report indicaring the locarions of the borings, boring logs, listing of all field explorarion and
<br />lab testing performed, various findings, conclusions and recommendations.
<br />
<br />Phase II: Design Development
<br />
<br />TaskA: Field Review
<br />
<br />The field review will be performed to obtain the following:
<br />
<br />. Confirmation of all affected surface topography within the proposed R1W-to-RJW limits, especially all surface
<br />utilities.
<br />
<br />. Map all failed pavement areas for inclusion on street widening plans
<br />
<br />. Note: Harris already mapped all existing tributary drainage boundaries and flow directions (see Exhibit 3,
<br />elsewhere in this proposal)
<br />
<br />. Look for perimeter conflicts for proposed sound walls, such as adjacent trees, patios, patio covers, room
<br />additions / house structures, swimming pools, etc. Note: extended aerial will also help to identifY these issues.
<br />
<br />. Note existing conditions that may affecr the design, especially at all of the proposed join points and impacred
<br />areas at side street curb returns and cul-de-sacs.
<br />
<br />. Notation of any access concerns / traffic control concerns.
<br />
<br />. Notation of any potential utility issues and other construction challenges.
<br />
<br />. Photographic documentation of the entire site and prepare rwo color photo logs (one for City staff).
<br />
<br />_I Harris & Associates.
<br />
<br />Bristol Corridor Widening - Phase I
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