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125 <br /> Triangle R:::,�!Ui io iI; T ro,,, j' <br /> a � Project DevOoprneiit Scope Work, <br /> oup In'lnl or urure <br /> Laboratory Testing <br /> Representative split-spoon, undisturbed Shelby tube, and bulk samples will be obtained to verify visual <br /> field classification and determine soil index and strength properties. Samples will be tested for natural <br /> moisture content, Atterberg limits, grain size, moisture density relationship (Proctor), California Bearing <br /> Ratio (CBR), and consolidation/strength properties. Unconfined compressive strength testing will be <br /> performed on recovered rock cores in order to determine strength properties. For retaining wall soil <br /> samples, Corrosion (pH, resistivity, sulfate, and chloride) testing may be required in order determine the <br /> corrosive potential characteristics for these structures. Further testing may be warranted depending on <br /> site conditions and design/analysis. <br /> It should be noted that Triassic Basin soil and rock conditions may require specialized testing and <br /> identification for engineering characteristics. If required, slake testing, locating slickenside seams, and <br /> defining locations of degradable rock along the project corridor will be performed. <br /> The URS Team will subcontract the laboratory testing services to Geotechnics. All tests will be <br /> performed in accordance with the latest AASHTO (American Association of State Highway and <br /> Transportation Officials), ASTM and NCDOT testing procedures, and soils will be classified according to <br /> the Unified Soil Classification System (USCS). <br /> Engineering Analysis and Recommendations <br /> After completion of the field investigation and laboratory testing, we will evaluate the field and <br /> laboratory test data, and perform engineering analysis and reporting that will include the following: <br /> • Field and laboratory test results, boring logs, and color photographs depicting site conditions. <br /> • A discussion of the understanding of the proposed construction including locations, dimensions, <br /> bearing elevations, loading conditions, etc. <br /> A discussion of the regional and site geology and topography. <br /> Subsurface water level elevations and its effect on the proposed design and construction. <br /> Engineering interpretations of the field and laboratory data. <br /> Preliminary recommendations for foundation type, bearing capacity/factored resistance, point <br /> of fixity, minimum tip elevation, etc. <br /> Preliminary recommendations for wall type, soil strength parameters, and global stability for <br /> retaining and noise walls. <br /> �ro Preliminary recommendations of typical pavement sections for the proposed parking facilities. <br /> RU Preliminary recommendations for stable slopes for any permanent cuts or fills. <br /> Preliminary recommendations for subgrade improvement and site preparation. <br /> Preliminary recommendations for backfill materials and placement including on-site availability, <br /> recommended index properties, grain size distributions, classifications, and moisture and <br /> density compaction criteria. <br /> Deliverable: <br /> Geotechnical Report(s) and lab results for the structures itemized. <br /> Nl urharn-Orange IIL..'ight Rail ..rrainsit: Pr ject: � June 2013 � 16 DRAFT <br />