LAVWMA FY 2020/21 Capital Projects

Rebuild Three Pumps and Their Associated Motors

Due to COVID-19 issues and the increasing costs of raw materials to manufacture these specialized pumps, the cost for this project have increased. A Notice Inviting Bids was posted on July 6, 2021 and bids were due on August 5, 2021.

Cost: $460,000

Resealing of all Three Storage Basins

Due to COVID-19 and staffing issues, this project is being carried over from FYE20. The basins need to be resealed approximately every ten years. GPS analysis did not show any settling. The rebar has been cut off even with the decks and the basins are ready to be sealed. The project will be combined with sealing of DSRSD’s storage basins, which may result in some cost savings.

Cost: $200,000

San Leandro Sample Station (SLSS) Design Improvements

This project has evolved from what was described for last year’s budget. 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.

Cost: $670,000

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.

Cost: $2,500,000

Road Drainage Improvements at the LAVWMA Pump Station

Included in last year’s budget, this project has been delayed due to COVID-19 and staffing issues. It will be combined with similar projects for DSRSD, which may result in some cost savings. This project will improve road drainage north of the storage basins.

Cost: $35,000

Cathodic Protection Projects

A survey is conducted every year on the cathodic protection system. Surveyors typically identify areas that need improvements. In recent years additional sections of pipeline have been checked resulting in significant improvements needed this year. There are eight routine projects to be completed for a total of $23,700. In addition, there are three more complex projects that need to be completed at a total cost of $160,000. They include 1) One of the parallel pipelines needs high resistance bond repairs as high resistance connections have been observed. This project will result in new bonding cables terminated at anew test station to be monitored in future annual surveys; 2) Livermore interceptor electrical discontinuity repairs. Two sections of this pipeline have been determined to be lacking cathodic protection, which will be installed resulting in a new test section; 3) Emergency Discharge Lateral Discontinuity Repairs. A section of this segment is without cathodic protection which needs to be installed resulting in a new test section for future surveys. All three of these projects require excavation which increases the costs.

Cost: $185,000

PLC Upgrade at the Pump Station

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. It will also be helpful with managing the system under the likely terms of the new EBDA agreement. This project was recommended by the 2016 Pump Station Evaluation Report.

Cost: $300,000

Pipeline Inspection

The pipeline inspection being conducted through the Pump Station Risk Analysis and Pipeline Inspection Project will result in recommendations for additional inspection of sections of the pipelines that were not addressed through that project. The pipeline is extraordinarily complex with many siphon sections that go under major highways or are very deep underground. Inspecting these sections is difficult and will require coordination between staff and contractors. This project will allow inspection of additional sections to contribute to development of a reliable remaining useful life of the most valuable asset in the system.

Cost: $100,000

Electrical Improvements to the Main Switchgear at the Pump Station

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

Smart Detectors on High Maintenance Air/Vac and Air Release Valves

This project would install Smart Detectors on pipeline vaults with high maintenance air/vac and air relief valves. The Smart Detectors would monitor the depth of the vault if an Air Relief Valve or Combination Valve fails or begins to leak water into the vault. The detector would recognize the level in vault is rising with water, and then send a signal/alarm to Operations which may prevent a spill to storm drains or creeks along the length of the pipelines. It will help to ensure compliance with Regional Board Sanitary Sewer Overflow requirements.

Cost: $40,000

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: $3,951,000