Agmt13 URS Corporation - Laserfiche WebLink

Browse Search

-WII��Y�Y 1 lYI�YI�1111�1��. ...________.____'_ .. .. .. IXHIBIT �An SCOPE OF SERVICES AND FEE The scope and fee terms for Amendment No. 2 are described below. Scope of Work Consultant will conduct and document an Extended Phase I (XPI) Study to: 1) determine the potential presence/absence, nature, depth, and lateral extent of any intact archaeological deposits or paleosols; and 2) refine the sensitivity analysis for buried archaeological resources within the Area of Potential Effects (APE). The following tasks and assumptions constitute the scope of work. Task 1: XPI Plan and Geoarchaeological Archival Analvsis - Consultant will prepare a brief XPI testing plan for submittal to and approval by Caltrans prior to any field investigations. This plan will outiine the field methods, decision thresholds, timetables, and permit requirements for the field investigation. It is assumed that a large portion of this background data has been previously compiled in available geoarchaeological reports in the Project vicinity, which are applicabie to the current Project. Once the field investigation plan is approved by Caltrans, Consultant will conduct an initial site visit to confirm landforms and utility clearances, plot boring locations, and maric locations for Underground Services Alert (USA). A private utility locator will be utilized to identify potential utilities within the investigation locations. Consultant will obtain the required drilling permit from the County of San Mateo. Due to the inherent safety issues when working adjacent to an active roadway and with drilling equipment, and in accordance with Consultant policy, a health and safety plan will be prepared prior to any�eld activities. Task 2: Geoarchaeolopical Field Investiqation - Consultant will conduct and document a targeted field investigation focused on the columns and abutments, and respective pile foundations, for interchange structural improvements. This will involve mapping of surFace geomorphology, as well as "Geoprobe" coring in the targeted areas to establish a subsurface context for the project area and identify any subsurface archaeological deposits, if present. Given the location of the piles, depth of impact, anticipated depth of the Holocene alluvial surfaces, and accessibility issues, the XPI program is limited to coring. The exact depth of each core will be limited by a number of factors. It is anticipated that the most geoarchaeologically sensitive area will be the upper approximately 15 feet of the alluvial landform below the Bay Mud. If this threshold is identified in the field and reached at a shallower depth than the proposed column depth, coring will be terminated prior to reaching the final column depth. Otherwise, the total depth of proposed project impacts will be cored. Altematively, due to the high clay content and stiffness of the Bay Mud formation, and underiying alluvial landform, it may not be possible to reach the�nal column depth. At this point, it is assumed that three days of coring will be sufficient to explore the APE for buried archaeological resources. REV:04-07-15 VR Page 4 of 7 A-4 ATTY/AGR.Amend No.2/URS