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. , the I -680 NB Bernal on -ramp but that no widening of the embankment or the bridge at the Arroyo will be necessary. Per Caltrans standards, the BKF Project Team will provide a Geotechnical Design and Materials B K F Report. The scope of work for the geotechnical investigative work, analysis and reporting is as follows: The BKF Project Team will review readily available geologic and soil literature in the vicinity of the Project site including review of as -built drawings and existing Log Of Test Borings prior to performing any field exploration. Permits /USA Clearances: The BKF Project Team will comply with local permit requirements and will field locate the borings and call for USA clearance. Field Exploration: For the proposed pavement widening, The BKF Project Team will drill and collect R- value samples from five locations along the ramp and the roadway. For the 1000 feet of retaining wall, we will drill up to 3 borings to 30' depth. The sampling will be performed in the dirt shoulder area and no pavement coring is included. The boring locations will depend upon the available access and overhead and underground utilities. Traffic control is not anticipated at this time. Laboratory Testing: The BKF Project Team will perform R -value tests on three (3) bulk samples. In addition tests such as unconfined compression, Atterberg limits and gradation will be performed. Soils Analysis /Evaluation: The BKF Project Team will perform engineering analyses and develop design recommendations for the proposed pavement sections. We will use the Traffic Index provided by the client. Standard Caltrans retaining wall recommendations will be provided for the proposed retaining wall. Draft Geotechnical Report: The BKF Project Team will prepare preliminary recommendations for the proposed pavement section and geotechnical recommendations for the Caltrans standard wall design. Final Geotechnical Design and Materials Report: The BKF Project Team will prepare a detailed report which incorporates the comments on the Draft Geotechnical Report and includes final design recommendations for the proposed pavement and retaining wall. Site Investigation Report Investigations In accordance with Caltrans standard requirements, Aerially Deposited Lead (ADL) testing will be required for work within the State right of way. The BKF Project Team will prepare a work plan and Health and Safety Plan for CALTRANS' review and approval. The work plan will identify the required borings for ADL testing. Field investigations will include drilling the approved borings and collecting soil samples for ADL testing using EPA Test Method 6010 and PH using EPA Test Method 9045. The results of the testing and analysis will be summarized in a Site Investigation Report to be used by for Project design and submitted to Caltrans for approval. Deliverables: Base Sheets Site Investigation Report and Workplan Supplemented Survey Data Draft Geotechnical Report Traffic Operations Report Final Geotechnical Design and Materials Report CEQA Categorical Exemption NEPA Categorical Exclusion Task 3 Geometric and Concept Design Development— Duration 1.5 month concurrent with Task 2 Upon completing the review of available documentation and obtaining initial traffic operations analysis results, BKF will initiate the geometric refinement process by evaluating the geometric design that would satisfy the Project's need and purpose. For the preliminary design, the development of the geometry and profile of a project is not just a check of horizontal and vertical conforms. Setting the geometry properly can minimize costly project impacts. Many sensitive components to cost and schedule involve right of way requirements, magnitude of utility relocations, grade differentials at conforms, impacts to structures, effects to adjacent roads and environmental impacts. The geometric design will be developed with sufficient detail to describe the existing and proposed project elements. It is essential that the geometric drawings produce a design that minimize right of way, cost and time consequences and meet Caltrans'