2004/08/18 Council Agenda Packet

b against defects and deficiencies in the work of the construction Contractor, and to advise the Construction Contractor when defects and deficiencies are observed in the work. Efforts will be directed toward determining that the completed project will conform to the plans and specifications, but the Consultant shall not be responsible for the means, methods, techniques, or procedures of construction selected by the Construction Contractor(s) or for any failure of Construction Contractor(s) to comply with laws, ordinances, rules, or regulations applicable to the construction work. The parties recognize that the Construction Contractor(s) is responsible for ensuring that construction is in accordance with the plans and specifications. Notwithstanding any inferences, references, or statements to the contrary contained within this document, the Consultant and City understand that the Consultant would not direct any Construction Contractors, Subcontractors, etc., at the job site, and it is hereby agreed that the Consultant would assume no obligation for any acts, errors, or omissions of parties other than the Consultant. Assist in preparing field note records and documents to assure the project is administered in accordance with Federal, State, and/or other funding agency requirements, including requirements of the Washington State Department of Ecology. Assist in preparing daily construction reports, detailing the Construction Contractor's operations performed for each day, record decisions and observations of a general or specific nature in chronological order. Measure quantities of materials installed, log equipment and staff used, and other related items. Items included in this scope of work: 3.1 Drilled shafts. Observation and logging shaft construction and confirmation of suitable tip elevation. Sampling and testing of drilled shaft structural concrete. Review of deformation data (monitoring) of existing sewer and structural earth wall adjacent to the shafts. Reporting on construction activities related to the shafts. 3.2 East Embankment. The existing east embankment fill will need to be extended roughly 100 feet to the south, and the surcharge at the west end of the embankment will need to be upgraded. This portion of construction will necessitate the extension of the previously constructed Wall 7, and the TAR roadway alignment and footprint will require preloading to mitigate long-term settlements. Construction of segments of temporary retaining walls along the BNSF right-of-way will also be required to retain the TAR preload. Task includes construction observation and QC/QA testing of imported and recycled gravel borrow fill; temporary retaining wall along TAR, and geogrid-reinforced block wall (Wall 7), structural earth wall at the east bridge abutment (Wall 6). 3.3 Landfill gas collection system elements and pump station. Construction observation and associated testing for low permeability soil barrier (LPSB); bentonite sand backfill (BSB); excavation, shoring and backfill at the pump station and condensate knockouts. 3.4 South 31d and West Approach. Construction observation and associated earthwork and pavement testing for subgrade preparation and benching and fill placement. 4.0 PRELOAD MONITORING 4.1 Settlement Plate Monitoring: Project plans include 9 settlement plates to be installed along the Temporary Access Road and at the 41st Street extension. Regular surveys of the settlement plates will be conducted by the Contractor during the preload embankment construction and by the Consultant thereafter (Task 2.2). Contractor-required settlement plate survey frequency is at least once a week. After embankment preload construction is complete, the settlement plates shall be surveyed on a monthly basis (see Task 2.2). 23 Attachment A: Scope of Work Page 2