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The work to be done under this contract includes the installation of the Dual Stage Hydrodynamic Separator (DSBB 11-24-150) and the RCP piping diversion system at the location near the intersection of Mandela Parkway and 24th Street in the City of Oakland as shown on the Plans and specified in these Specifications. The DSBB will be furnished by the city. The work shall include, but not limited to, mobilization, traffic control, temporary fencing and barricade, clearing and grubbing, water pollution control, dust control, control of ground and surface waters, installation of shoring system; removal and disposal of existing RCP piping; removal and replacement of existing concrete and asphalt concrete pavements, curbs and gutters, saw cutting; installation of signage, pavement markings and traffic striping; removal and disposal of debris and materials, soil excavation, off hauling and disposal of excavated materials to appropriate disposal site, preparation of subgrade, supplying and placement of structure base materials and pipe bedding materials; structural excavation and backfill; trench excavation and backfill; roadway excavation and backfill; furnishing and installation of materials and components of the storm water treatment unit, sump, riser, manhole/access hatches; supplying and placement of structural concrete, junction boxes, weir wall, pipe collars; installing 72” and 96” RCP piping; furnishing and installation of manholes, manhole frames and covers; supplying and placement of imported backfill materials, permanent and temporary resurfacing, protection of existing facilities and utilities; as well as furnishing and installation of the Project 1006066 Mandela Parkway Trash Capture Device – ReBid December 2023 associated appurtenances necessary or required to satisfactorily complete the work as shown on the Plans and required in these Specifications.

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