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STANDARD AGREEMENT FOR PROFESSIONAL SERVICES Page 2 of 3 <br />Between City of South Bend and ARCADIS U.S., Inc. Project Number: 03029034.0000 <br />AMENDMENT No. 1 <br />Schedule A-1 <br />Scope of Amended Services and Related Matters <br />ENGINEERING SERVICES BY ARCADIS <br />Aeration Gallery Top Slab: To provide a design of a new Aeration Gallery top slab. The top slab will cover the tunnel <br />and the existing Return Sludge Channel which is currently being converted from a liquid channel to a dry channel to house <br />the return sludge piping header. The existing steel plates that currently cover the Return Sludge Channel will be removed <br />and new access hatches will be provided at key locations for tunnel and return sludge pipe access. It is assumed that the <br />existing top slab will remain in place and act as the formwork/shoring for the placement of the new top slab over it. The <br />top slab will be designed for a loading adequate for the heaviest equipment and vehicles it will see. Pick points will also be <br />provided along the length of the top slab for equipment maintenance and piping removal. To account for the additional <br />height of adding the new slab over the existing slab, steps will be incorporated where needed to provide safe and adequate <br />access/egress and new railing will be provided along the full length of the west and east sides of the new top slab. <br />Substitutions: Per our Agreement, Arcadis and its subconsultants will separately track the time and expense required for <br />substitution reviews and invoice for such reviews as Additional Services. To date, the following substitutions have been <br />requested or submitted by the Contractor and reviewed by Arcadis and its subconsultants. Note that there are ongoing <br />discussions on several of these items that will continue to be tracked and submitted as Additional Services. <br />Ref. No. Substitution Item <br />5-001 <br />Compact DI Fittings <br />5-002 <br />HDPE Wall Sleeves <br />S-003 <br />Scum Station Relocation <br />5-004 <br />Combined Meter Vault <br />5-005 <br />Junction Box E Reconfiguration <br />5-006 <br />Junction Box NT <br />5-007 <br />Pass 1 Wall <br />S-008 <br />Scum Station Revision <br />5-009 <br />RAS Station Relocation <br />RFI-019 <br />Electrical Conduit Material <br />RFI-020/092 <br />Final Clarifier Effluent Pipe Reconfiguration <br />RFI-024 <br />Scum Pipe Direction Drill <br />RFI-025 <br />Precast Structure Bases <br />Email <br />Carbon Steel RAS/AE Piping <br />Email <br />Galvanized Clarifier Mechanism <br />South Bend Secondary Improvements CA Amendment No ] <br />