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INTER -OFFICE MEMORANDUM <br />DEPARTMENT OF PUBLIC WORKS <br />DIVISION OF ENVIRONMENTAL SERVICES <br />TO: Members of the Board of Public Works <br />Eric Horvath, Director of Public Works <br />Michael Schmidt, 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. 4 <br />Project No. 114-053: Wastewater Treatment Plant Secondary Treatment <br />Improvements <br />DATE: August 1, 2016 <br />The Department of Environmental Services (DES) is requesting the Board of Public Works <br />approval of Change Order No. 4 for Project No. 114-053 Wastewater Treatment Plant <br />Secondary Treatment Improvements. Refer to attached documents for supporting details. <br />Change Order No. 4 addresses the following changes: <br />Remove and Replace, Eight (8) Aeration Air Header Pipes <br />$206,823.00 <br />Dewatering Pump Timing Relays <br />$ <br />3,091.00 <br />Gallery 4, Heating Panel Conduit Reroute <br />$ <br />3,167.00 <br />Fiber Optic Cable and Conduit Reroute <br />$118,631.00 <br />Lower Dewatering Wells <br />$ <br />26,685.00 <br />Nitrification Pipe Removals <br />$ <br />1,492.00 <br />Remove Five (5) Four Inch Diameter Conduits at Aeration Channel $ <br />3,108.00 <br />Aeration Tank Pass 1 Concrete Baffle Wall Removals <br />$ <br />10,713.00 <br />Pressure Relief Valves, Full Depth Removals <br />$ <br />22,406.00 <br />Remove and Replace Four (4) 36" Diameter Knife Gates Valves <br />$210,660.00 <br />NET INCREASE FOR CHANGE ORDER NO. 3 ITEMS $606,776.00 <br />Original Contract Sum $11,885,000.00 <br />Net change by previously authorized change orders $ 101,221.75 <br />The contract sum prior to this change order $11,986,221.75 <br />By this change order, the project amount increases by $ 606,776.00 <br />The new contract sum including this change order is $12,592,997.75 <br />This Change Order represents a total change of +5.11% <br />Total change for the entire project +5.96% <br />Time Extensions: 21 Days added to Substantial Completion, August 16, 2017 <br />21 Days added to Final Completion, September 15, 2017 <br />The primary funding sources for the construction of this project is the 2012 Sewer Bond (661- <br />0630-415-42-06). If there are any questions regarding the subject project, please contact Al <br />Greek (Ext. 4210) or Jacob M. Klosinski (Ext. 9496) at the Division of Utilities. <br />