Agmt 2018 CSA CoSL and BKF Engineers for Annual Street Overlay

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1.6 Subgrade and Pavement Evaluation Consultant will complete deflection testing for all streets. Deflection testing and analysis shall be done consistent with California Test Method 356 and the California Highway Design Manual Chapter 630, topic 635. At each test section, Consultant will core the pavement to determine the existing thickness of the road section. Bore locations shall be marked with white paint and submitted to USA for utility clearance. During marking of pavement borings, Consultant will meet with a City representative familiar with the site's underground utilities to assist in avoiding conflicts between pavement borings and existing underground utilities. Upon encountering detectable underground utilities during pavement boring, consultant shall investigate and document the type and depth of the utility.. Consultant will quantity and qualify the engineering properties of the subgrade soils including moisture content, R - Value, and Plasticity Index as part of the geotechnical evaluation. Consultant will work with the contractor to acquire representative samples of the roadway to find if concrete pavement lies below the asphalt. 1.7 Storm Drain System and Existing Hydrology Patterns: Using information from GIS, USGS, and field review, Consultant will establish general drainage patterns for each street in the project area. Consultant will conduct interviews with City maintenance staff to determine locations of potential problems. Consultant will video existing drainage patterns to document existing conditions during rainfall. 1.8 Utility Locating and Potholing. Consultant will locate existing non -gravity utilities by potholing and identify potential utility conflicts. Consultant will submit a work plan and traffic control plan; if work is done by a sub -consultant, they will submit insurance meeting the requirements of this contract.. Consultant will supervise the potholing and record the results. All potholes will be backfilled with a controlled low strength material. Deliverables: • Project report consisting of findings, pavement design matrix, including repair options for each street, existing structural sections, etc. Task 2: Preliminary Engineering (30% PS&E) Objective: Based on the selection of streets to receive repair, Consultant will refine the design and confirm the estimated cost of improvement. 2.1 Cost Analysis: Consultant will refine the estimate confirming that the scope of work for the pavement rehabilitation is within budget. Should the scope exceed the budget, Consultant will provide value - engineering strategies. 2.2 Project Report: Consultant will document findings and recommendations in a report format that will serve as the basis of design. This report will include: • Executive Summary • Summary of existing surface conditions including updated PCI, horizontal and vertical grades, deflection test results, pavement and base properties, soil properties, and accessibility compliance • Summary of storm drain runoff patterns • List of potential project risks including permit conditions, public utility relocations, or private property coordination necessary to complete the work • Recommendations for pavement restoration including projected design life. Consulting Services Agreement between City of San Leandro and Last revised 06/28/2018 BKF Engineers, Inc. for Annual Street Overlay/Rehabilitation 2018-19 COSL Project No. 2019.0050 Exhibit A — Page 3 of 6