CSA Nichol Consulting Engineers 06012022 (2)

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Consulting Services Agreement between City of San Leandro and March 22, 2022 NCE for Annual Street Paving 21-23 Exhibit A – Page 5 of 11 information will be included in this review, such as quantities and treatments of failed pavement sections (base repairs) and full width milling and wedge grinding requirements. Unless otherwise indicated in this scope of work, the pavement term “resurfacing” shall signify a surface application of asphalt rubber cape seal (ARCS) over the existing pavement with dig out repairs at selected locations as needed. Similarly, the term “rehabilitation” shall signify milling and replacing the upper asphalt concrete surface (‘mill and fill”) and include dig-out repairs at selected locations as necessary. Other treatment options or revisions to the street selections may be considered in the future as more information becomes available during the design. A Pavement Design Technical Memorandum summarizing the field data collection and recommended repairs for the selected streets will be prepared for City review. This memorandum will be a ‘living’ document that will be updated throughout the course of the project as new information becomes available or to reflect revisions requested by the City. Subtask 2.1 Pavement Coring: NCE will collect selected pavement section core samples (4” – 8” diameter cores) on all mill and fill street sections. For each core sample, Consultant will measure and record the thickness and material type of each layer encountered in the pavement structural section, including the presence of any pavement reinforcing fabric. Bulk samples of subgrade materials will be collected at the core locations for laboratory testing such as R-value, moisture content and Atterberg Limits (plasticity index) determinations. The presence of AB will be measured at all cores. A dynamic cone penetrometer test will be completed at selected core locations to estimate AB and subgrade layer properties. Additionally, Consultant will apply for and obtain an encroachment (or similar) permit from the City prior to starting the coring. Consultant will arrange for traffic control services during the coring to minimize any inconvenience to traffic, parking and public access. Preparation of individual traffic control plans for coring is assumed not to be required. All work on collector or arterial streets shall be restricted to within the hours of 9:00 am and 3:00 pm. Subtask 2.2 Pavement Deflection Testing Consultant will perform non-destructive pavement deflection testing in accordance with California Test Method (CTM) 356 to evaluate the structural capacity of existing pavement section on arterial and collector streets to be rehabilitated by mill and fill where such data would be relevant to the design of the pavement repair. Consultant to develop the extent of deflection testing with the City and based on available street information. Additionally, Consultant will apply for and obtain an encroachment (or similar) permit from the City prior to starting the deflection testing. Consultant will arrange for traffic control services during the deflection testing to minimize any inconvenience to traffic, parking and public access. Preparation of individual traffic control plans for deflection testing is assumed not to be required. Task 3 – Utility Coordination and Encroachment Permitting Consultant will issue project notification letters to applicable utility providers with a preliminary project schedule for street resurfacing and rehabilitation and request utility facility maps, as-builts and record drawings for street sections planned for rehabilitation. As part of Task 6.2, below, Consultant will locate utilities using GPR and coordinate with and provide this information to applicable utility providers. DocuSign Envelope ID: DCD04F48-8A5B-4F32-9A2F-91EC4E276E20