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City of Pleasanton DRAFT Recycled Water Infrastructure Expansion Phase 1A Design of Additional Improvements A booster pump station is needed to increase system pressure at the Sports Park and to convey recycled water south along the Valley Avenue corridor. The booster pump station would be supplied by a connection to the recycled water system at the Sports Park where the Arroyo Mocho crossing enters the turf fields and discharge into the system just downstream of the supply connection, boosting pressure in the system south of the Arroyo Mocho. The booster station would be sized to accommodate the following operating scenarios: • A: Phase 1A customers south of Arroyo Mocho only,consisting of all of the Sports Park and Tennis Center meter connections. Minimum service pressure for Sports Park is 75 psi at the meter. • B: Scenario A plus the proposed Valley Avenue extension to the Bernal Community Park on Laguna Creek Lane, including additional irrigation customers in KoII Center,Township development,Safeway commercial development and Bernal Community Park. Minimum service pressure is 60 psi to these customers at the meter. • C: Scenario B plus the future extension to Callippe Reserve Golf Course pond, including additional irrigation customer Callippe Reserve Golf Course. Minimum service pressure to Callippe irrigation supply pond discharge is 5 psi, however this demand is off-peak and does not impact booster pump station sizing. Task Description: RMC shall perform the following: 1. Hydraulic model analysis for each scenario using demand information provided by the City. Results of the analysis will confirm extension pipeline diameters(up to two potential alternatives will be considered based on City's preference to bid alternate sizes), booster pump station discharge pressure requirements, identify the pump design flow and head conditions. The RMC team will also use the hydraulic modeling as a basis for conducting a pressure surge analysis to determine extent of transients within the overall system caused by a sudden power outage at the booster station and recommend mitigation to control the transients to within the service capabilities of the PVC pipe systemz, 2. Review site constraints and meet with City Parks staff to address siting and operational requirements and features for the new pump station. 3. RMC will coordinate with packaged pumping system manufacturers to obtain competitive pricing quotations for comparable systems: a. RMC will research systems available from manufacturers(e.g. Grundfos)to meet the required discharge head and flow from hydraulic analysis,and obtain initial equipment selections for packaged pump stations from three manufacturers. To facilitate this, RMC will prepare a project narrative including critical design and operational criteria. No detailed specifications are anticipated. b. RMC will confirm manufacturer's ability to incorporate surge control measures into the packaged system (as determined in Task 1). c. RMC will review the initial selections to confirm that they meet stated requirements and will normalize equipment package scopes and construction details to the extent possible through negotiation with the manufacturers.The intent of this negotiation Scope of Work 2