LAVWMA FY 2020/21 Capital Projects

Rebuild Three Pumps and Their Associated Motors

This project has been delayed from FYE21.The costs include $357,000 for the new pumps, rebuilding two motors, engineering services, and DSRSD staff time to remove the old pumps and install the new pumps and rebuilt motors. The projected delivery date for the new pumps is December 16, 2022

Cost $510,000

San Leandro Sample Station (SLSS) Design Improvements

This project has evolved from what was described for last year’s budget and is being carried over. It also now includes:

  1. 24-inch flow control valve
  2. 20-inch flow control valve
  3. Two 30-inch flow meters
  4. Two chlorine residual analyzers
  5. Miscellaneous piping and fittings to accommodate different pipe sizes
  6. Improvements to the Programmable Logic Controller (PLC), Human Machine Interface (HMI), Supervisory Control and Data Acquisition System (SCADA), networking and programming

The SLSS station has to be designed to measure chlorine residual and monitor pH continuously. These parameters have to be measured both when effluent is going to EBDA and when effluent is dechlorinated and diverted to San Lorenzo Creek during wet weather events or during system testing. Composite samples of LAVWMA’s effluent need to be taken when its directed to both EBDA and San Lorenzo Creek. Grab samples of LAVWMAs Effluent also need to be collected for Bacteriological analysis in both situations. The design of the SLSS is complicated by the following factors: 1) The discharge to San Lorenzo Creek wet weather outfall is rare; 2) During normal daily operations the LAVWMA pumps shut off during peak demand periods and therefore the pipeline is not full during those times; 3) The station is not staffed continuously. The goal of this project is to work with operational staff and the RWQCB to design the station to meet operational, maintenance and regulatory expectations in a manner which creates as little day to day maintenance as possible. The project will now also address probable sea level rise at the discharge point and provide a design to ensure discharge will always be possible. Approximately $90,000 has been spent on design through the end of the fiscal year. The 75% plans and specifications have been received and reviewed.

Cost: $900,000

Pump Station Motor Control Center (MCC) and Soft Starter Upgrades

In last year’s budget this was described as a two- year project. COVID-19 issues have delayed the design portion of the project. DTN Engineers is under contract for the design and technical support during construction. The final Engineer’s Estimate was $2,300,000 – $2,500,000. The original estimate was $1,065,000. The increased costs are due to the following:

  1. Added two auxiliary medium voltage MCCs to handle the power factor corrections automatically.
  2. Added additional enhanced protection features to the existing main power distribution switchgear and sole sourced Eaton for all of this enhanced work. Specified Eaton to provide software configuration for the Power Quality SEER for communication with the new starters. Current starters do not have any digital communication with the existing power distribution network. This will match systems at DSRSD making operation and maintenance standardization.
  3. Added motor winding insulation monitoring system as a customized feature so that staff does not have to shut down the pump to monitor the health of the motor windings. These systems monitor when pumps run or are off.
  4. Added control panel modifications to replace existing Eaton RTD modules with new RTD controllers, and also added a fiber link from the pump pad to the building control panel. Required all these RTD controllers digitally communicate back to the PLC for data monitoring and alarm.
  5. Miscellaneous items:
    1. Modifications of the existing doors into the electrical room.
    2. Redo the stairs at the control panel to accommodate new conduit runs.
    3. Customized switchgear dimensions to fit the existing cable/conduit terminations.
    4. Added a Storage bin for staff to store electrical parts.
  6. Added Construction Management Services to ensure proper oversight of the project. DSRSD does not have adequate staff at this time to provide internal Construction Management Services.
  7. The Notice of Substantial Completion was sent to the Contractor on August 8, 2022.

Cost: $2,500,000

Cathodic Protection Projects

This project is being carried over from FYE21. Corrpro is proceeding with this project. There were eleven tasks and the simplest eight have been completed. Three tasks require permitting, excavation and traffic control and are in development.  This project has been delayed and is carried over from last year.

Cost: $135,000

PLC Upgrade at the Pump Station
This project is being carried over from FYE21. The existing Programmable Logic Controller (PLC) at the pump station is almost 20 years old and is near the end of its useful life. It is an OPTO22 system and needs to be upgraded to Allen Bradley PLC to match the PLCs used by DSRSD. An upgrade to the OPTO22 system at the San Leandro Pump Station is already complete. This is a complex project that requires engineering design, equipment, installation, and construction support. Upon completion the system will be consistent with that of DSRSD improving operation and performance.

Cost: $300,000

Pipeline Inspection

ne of the recommendations from the risk analysis project was to inspect portions of the pipeline and provide a report with future recommendations. The report recommended repairs on one section that will cost approximately $35-40,000. The repot also recommends continuing to inspection portions of the forcemains annually such that the entire pipeline will have been inspected within about five years. Much of this cost is for DSRSD staff. DSRSD staff has developed a plan that will be implemented this fall.

Cost: $100,000

Electrical Improvements to the Main Switchgear at the Pump Station

This project is being carried over from FYE21. This project will improve the original equipment at the pump station. It includes upgrading to multi-function relays at the main service switch gear, which will require some design and interfacing with PG&E. It also includes adding time delay/remote close/trip switches for the main breakers to reduce the arc flash hazard to staff. Both of these items were recommended by the 2016 Pump Station Evaluation Report.

Cost: $50,000

Replace Seventeen Valve Actuators at the Pump Station

There are seventeen valves that have electric actuators at the pump station. All of the valves actuators were installed when the pump station was upgraded twenty years ago and they are at the end of their useful lives. The actuators will be replaced with the newest technology and will match the style that are commonly used at DSRSD. The actuators cost approximately $9,000 each and will be installed by DSRSD staff. The total cost includes staff time for the installation.

Cost: $250,000

Replace Three Flow Meters at the Junction Structure

The three flowmeters at the junction structure are at the end of their useful lives and are no longer as accurate as required for reporting purposes. The project will include replacing all three and then determine if further modifications, such as, snorkels, are required for the flow measurement accuracy required. The cost of the project includes the three meters plus installation and testing costs

Cost $250,000

Other Misc. LAVWMA Renewal/Replacements

As needed.

Cost: $50,000

Other Misc. EBDA Renewal/Replacements

As needed.

Cost: $50,000

CIP Planning/Mgmt./Contingency

As needed.

Cost: $50,000

Total Expenditures: $2,650,000