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INTEROFFICE MEMORANDUM <br />DEPARTMENT OF PUBLIC WORKS <br />DIVISION OF UTILITIES <br />TO: Members of the Board of Public Works <br />Eric Horvath, Director of Public Works <br />Catherine Fanello, Board of Public Works Attorney <br />FROM: Al Greek, Director of Utilities <br />Jacob M. Klosinski, Assistant City Engineer <br />SUBJECT: Agenda Request Form — Change Order No. 15 <br />Project No. 114-053: Wastewater Treatment Plant Secondary Treatment <br />Improvements <br />DATE: October 13, 2017 <br />The Division of Utilities is requesting the Board of Public Works approval of Change Order No. <br />15 for Project No. 114-053 Wastewater Treatment Plant Secondary Treatment Improvements. <br />Refer to attached documents for supporting details for the subject work. <br />Change Order No. 15 addresses the following changes: <br />COP 52.1 -- RAS Pump Station Coating, Credit <br />COP 88 — Untangle Float Switches at Dewatering Wells <br />COP 89 — Replace Dewatering Pump #7, Reinstallation Labor <br />COP 91 — Remove and Reroute Electrical Conduit Aeration Gallery <br />COP 93.1 — Relocate Air Release Valve, Air ReleaseNacuum Valve <br />COP 94.1 — RAS Chlorination Piping and Distribution <br />COP 95 — Re -install Knife Gate Valve, Gallery #1, Final Clarifier 2 <br />COP 96 — Rotate Existing Knife Gate Valve Seats Gallery #1 and #2 <br />Unused Unit Price Quantity Deductions (See Attached Summary) <br />NET DECREASE FOR CHANGE ORDER NO. 15 ITEMS <br />Original Contract Sum <br />Net change by previously authorized change orders <br />The contract sum prior to this change order <br />By this change order, the project amount decreases by <br />The new contract sum including this change order is <br />This Change Order represents a total change of <br />Total change for the entire project <br />Time Extensions resulting from Change Order No. 14: <br />Substantial Completion: <br />Final Completion: <br />($ 15,000.00) <br />$ 4,386.00 <br />$ 3,373.00 <br />$ 4,913.00 <br />$ 16,448.00 <br />$ 30,633.00 <br />$ 3,068.00 <br />$ 2,999.00 <br />52 570.00) <br />($ 1,750.00) <br />$11,885,000.00 <br />$ 2,036,615.47 <br />$13, 921, 615.47 <br />($ 1,750.00) <br />$13, 919, 865.47 <br />-0.02% <br />+17.12% <br />0 days <br />0 days <br />