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49ot�fg�1�// Mid -Basin Injection Centennial Park Project Fountain Valley, California Client Name: Orange County Water District Year Completed: 2017 Reference: Orange County Water District 18700 Ward Street Fountain Valley, CA 92708 Michael Markus, PE 714/378-3305 The Mid -Basin Injection Centennial Park Project is located within Centennial Park in the City of Santa Ana. Four injection wells constructed in below ground vaults are proposed to inject 12 MGD of GWRS water into the principal groundwater aquifer approximately 1,200 feet below ground surface. The project consists of the following: • Four (4) Submersible backflush pumps will be installed within the injection wells with a design flowrate of 3,000 gpm to purge the entire well column and surrounding strata. Each of the four injection wells will require a pipeline connection to deliver the supply water for injection. The source of water for these wells will be the GWRS pipeline located in the western levee of the Santa Ana River. Approximately 5,700 linear feet of supply pipeline will be constructed to injection wells within Centennial Park. The supply pipeline is proposed to be cement mortar coated and epoxy lined steel pipe, and will vary in size from 36-inch, 16-inch, and 12-inch. The supply line will cross the Santa Ana River which will require the pipeline to be constructed on the newly expanded Edinger Avenue Bridge. • Approximately 4,200 linear feet of 16-inch backflush pipeline will be constructed within Centennial Road to convey well backflush discharge to the lake or the Greenville -Banning Channel. • A monitoring well is proposed down gradient of the Park's injection wells to monitor the impacts to the groundwater basin. The monitoring well is proposed within the Heritage Museum of Orange County. The area around the monitoring well will be improved and a new irrigation system for the museum farm will be installed. • Two (2) Shared Facilities that will be occupied by OCWD and the City of Santa Ana. TETRA TECH 25E-45 Mid -Basin Injection Centennial Park Project Fountain Valley, California Client Name: Orange County Water District Year Completed: 2017 Reference: Orange County Water District 18700 Ward Street Fountain Valley, CA 92708 Michael Markus, PE 714/378-3305 The Mid -Basin Injection Centennial Park Project is located within Centennial Park in the City of Santa Ana. Four injection wells constructed in below ground vaults are proposed to inject 12 MGD of GWRS water into the principal groundwater aquifer approximately 1,200 feet below ground surface. The project consists of the following: • Four (4) Submersible backflush pumps will be installed within the injection wells with a design flowrate of 3,000 gpm to purge the entire well column and surrounding strata. Each of the four injection wells will require a pipeline connection to deliver the supply water for injection. The source of water for these wells will be the GWRS pipeline located in the western levee of the Santa Ana River. Approximately 5,700 linear feet of supply pipeline will be constructed to injection wells within Centennial Park. The supply pipeline is proposed to be cement mortar coated and epoxy lined steel pipe, and will vary in size from 36-inch, 16-inch, and 12-inch. The supply line will cross the Santa Ana River which will require the pipeline to be constructed on the newly expanded Edinger Avenue Bridge. • Approximately 4,200 linear feet of 16-inch backflush pipeline will be constructed within Centennial Road to convey well backflush discharge to the lake or the Greenville -Banning Channel. • A monitoring well is proposed down gradient of the Park's injection wells to monitor the impacts to the groundwater basin. The monitoring well is proposed within the Heritage Museum of Orange County. The area around the monitoring well will be improved and a new irrigation system for the museum farm will be installed. • Two (2) Shared Facilities that will be occupied by OCWD and the City of Santa Ana. TETRA TECH 25E-45