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BACKGROUND On August 16, 2016, City Council authorized the expansion of the recycled water system on Gibraltar Drive from West Las Positas to Hacienda Drive, Tassjara Tank vault improvements, and purchase of a pre-packaged booster station to be installed at Ken Mercer Sports Park. The available loan and grant funds upon completion of the original recycled water infrastructure construction project totaled $2,532,000. The three components of system expansion work considered on August 16, 2016 were estimated to cost a total of $1,475,000. The expansion of piping on Gibraltar Drive and Tassjara Tank vault improvements have been completed by Ranger Pipelines, Inc., and final costs of $963,000 are being invoiced by the contractor. The purchase of the station is estimated to cost $423,824. The cost to install the station varies based upon the selected location. There are loan and grant funds available in the original budget to cover all the costs. The hydraulic modeling during the original design of the recycled water system identified that the sports park may require a booster station to meet the water demands within the watering window of 10 p.m. to 6 a.m. Steps taken in the attempt to allow the system to operate successfully without a booster station included increasing the number of recycled water service points and connecting all the separate irrigation systems in the park. Despite these efforts, upon startup of the recycled water system, several field trials led to the conclusion that efficient watering of the fields in the available watering window does require a booster station. During the original design, the south side of the Arroyo Mocho channel crossing was identified as the ideal location to place the booster station. It was also determined that the station should be sized to provide service to the Sports Park and Tennis and Community Park. Upon approval by City Council in August to purchase a booster station, detailed design work was conducted, including additional hydraulic modeling. The design team was tasked to look into several scenarios which included the requirements for the two parks as well as the requirements to provide service to the south side of the City should the system eventually be expanded. It was identified that the size of the booster station for the sports park alone would be able to provide additional service to the south side of town (including the Tennis and Community Park) by only slightly increasing the pressure. It was also determined that the additional pressure required did not change the size of the pumps required. The station is now designed to accommodate the Sports Park and Tennis and Community Park needs, as well as the future expansion of the system to the south side of the City. The design of the booster station was completed by RMC Water and Environment, and proposals were requested from four pre-packaged booster station manufacturers. Two firms, Patterson Pumps ($368,542) and Pumpworks ($504,825), responded with proposals. Upon review of the proposals, Patterson Pumps was found to be the most responsive proposal. Staff recommends Council authorize the purchase of the Patterson Pumps system. Page 2 of 6