San Jacinto Valley RWRF Centrate Equalization Design Amendment

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San Jacinto Valley RWRF Centrate Equalization Design Amendment Erik Jorgensen June 25, 2020 |

San Jacinto Valley RWRF Centrate Equalization Design Amendment Erik Jorgensen June 25, 2020 | emwd. org

Background • Centrate from biosolids dewatering at SJVRWRF is currently returned to the secondary

Background • Centrate from biosolids dewatering at SJVRWRF is currently returned to the secondary process without equalization impairing nutrient treatment and removal • In August 2018, the Board awarded a contract to Kennedy/Jenks Consultants (KJ) for the engineering design of the SJVRWRF Centrate Equalization Project 2 | emwd. org

Background (continued) • Staff is also advancing the SJVRWRF Plant 1 Rehabilitation project •

Background (continued) • Staff is also advancing the SJVRWRF Plant 1 Rehabilitation project • Additional modifications to the SJVRWRF Centrate Equalization Project are now needed to address project cost saving measures being implemented under the Plant 1 rehabilitation project • The impact to the centrate equalization project includes added yard piping and flow measurement equipment to return centrate to both Plants 1 and 2 3 | emwd. org

Consultant’s Scope of Work KJ proposes to perform design revisions as follows: • •

Consultant’s Scope of Work KJ proposes to perform design revisions as follows: • • Additional yard piping and flow measurement equipment Addition of chemical metering system to mitigate struvite formation. Staff negotiated a fee in the amount of $54, 705 to address the added scope of services. KJ was competitively selected for this project. They are providing a high level of service. 4 | emwd. org

Schedule Notice to Proceed August 2018 Design Amendment Notice to Proceed July 2020 Complete

Schedule Notice to Proceed August 2018 Design Amendment Notice to Proceed July 2020 Complete Final Design March 2021 Award of Construction Contract August 2021 Substantial Completion August 2022 Project schedule developed to coordinate with implementation of SJVRWRF Plant 1 Rehabilitation. 5 | emwd. org

Recommendation Approve and authorize Execution by the General Manager, or his designee, to execute

Recommendation Approve and authorize Execution by the General Manager, or his designee, to execute an amendment to the engineering services agreement with Kennedy/Jenks Consultants in an amount of $54, 705 for the design of the SJVRWRF Centrate Equalization Project; bringing the total agreement to an amount of $298, 705; and additional appropriation of $132, 609 bringing the total project cost to an amount of $441, 905. 6 | emwd. org

Contact Information Erik Jorgensen, P. E. Principal Civil Engineer (951) 928 -3777 Ext. 4471

Contact Information Erik Jorgensen, P. E. Principal Civil Engineer (951) 928 -3777 Ext. 4471 Email: jorgense@emwd. org 7 | emwd. org