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ATTACHMENT 1 <br /> 41., <br /> Pakpour Consulting Group, Inc. <br /> December 22, 2021 <br /> Updated January 5, 2022 <br /> SM Saklaen <br /> Associate Civil Engineer, Engineering <br /> City of Pleasanton <br /> P.O. Box 520 <br /> Pleasanton, CA 94566 <br /> Subject: Addendum No. 1 Budget Increase <br /> Val Vista Park Underdrain System Improvements CIP#21457 <br /> City of Pleasanton <br /> Dear SM, <br /> Per your request we are following up the December 1,2021 field meeting with Park Maintenance <br /> Division (Parks) staff to review City comments for the 65% submittal plans for the Val Vista Park <br /> Underdrain System Improvements CIP #21457 project. Pakpour Consulting Group's (PCG) <br /> original design proposal dated June 10, 2021 excluded detailed design plans and specifications <br /> for the pump stations, wet-wells, control systems and electrical supply to provide power. We <br /> understand now Parks staff preference is to include the following additional scope items: <br /> • Package Pump Station <br /> • Simplex Control Panel System <br /> • Electrical Power Supply <br /> • Additional Project Specific Details <br /> Task 1.1—Package Pump Station Design <br /> The City requested PCG to explore various pump station layouts with local suppliers to develop a <br /> decision matrix for the two proposed small pumps stations included with the 65%submittal plans <br /> for City staff review and approval. The submittal package also included a memorandum <br /> summarizing the estimated excess irrigation flowrates for Parks staff review and approval. We <br /> understand Parks staff will be responsible for maintaining the underdrain collector line system <br /> for the three existing soccer fields and two proposed small pump stations to be located west of <br /> Field Nos. 1 and 3. Parks staff now prefer a package pump station design. <br /> The package pump station supplier,Jensen Engineered Systems (JES), includes a project specific <br /> design, plans and specifications with the construction cost. Pump station commissioning and <br /> training of Parks staff can be provided by JES as sperate cost items, which will be included with <br /> the project specifications. <br /> { 6601 Owens Drive,Suite 230,Pleasanton,CA 94588 <br /> (925)224-7717•FAX(925)224-7726•www.pcgengr.com ZernI o11 Int(�rtiiied �� <br />