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This document outlines specifications for Phase 2 of a sewer interceptor project, covering various aspects of construction including jacking operations, annular space grouting, sewer abandonment using low-density cellular concrete (LDCC), and extensive roadway work. Roadway specifications detail preparation, surface treatment, dust control, joint preparation, leveling courses, adjustments for castings, traffic sensor devices, utility pole coordination, hydrant and valve management, street signage, driveways, sidewalks, curbing, planting strips, shoulders, guard rails, fences, walls, survey markers, layout stakes, pavement markings, and the construction of new stone masonry retaining walls. It also specifies requirements for gravel subbase and base courses, reclaimed base course, pavement binder, base, intermediate, and top courses, and crack sealing. Measurement and payment details are provided for each work item. Submittals for LDCC installation include manufacturers' specifications, product data, and references from similar projects. Quality control and testing are emphasized throughout, with specific requirements for density and compressive strength of LDCC, and material composition and compaction for pavement courses. The contractor is responsible for all labor, materials, equipment, and incidentals required for the specified work, with specific payment items and units defined for each task.
The bid notice indicates that payment will be made on the basis of the percentage of work completed as determined in the contractor's approved schedule of values.
The contractor shall engage an independent, Commonwealth of Massachusetts registered professional land surveyor to provide a detailed horizontal and vertical settlement monitoring program during the jacking operation.
The contractor shall be responsible for repairing or replacing, to the engineer's satisfaction, any guard rails, fences, or walls, or any part thereof, which becomes damaged as a result of their activities.
The engineer will be notified at least 72 hours prior to the startup inspection and a site inspector representing the owner will be present during the startup inspection.
The grouting subcontractor shall submit certified laboratory testing results documenting the required performance of the proposed chemical grouting at least 30 days prior to the commencement of injection operations.
