tida board progress report

TICD LLC

TIDA Board Progress Report

Infrastructure Plan and Sustainability Plan Updates

October 14, 2009

AGENDA

– Water System– Wastewater System– Stormwater Management– Electrical Supply– Energy Sustainability Alternatives

Proposed Domestic Water System2009

1. No changes to conceptual layout of the domestic water system

2. Reduced total domestic demands

3. Prepared “Water Tank Siting Study”

1. Water demands revised by SFPUC based on the 2004 Water Study. Includes water demands and conservation projected to 2030.

• 2006 Estimated Domestic Water Demand1.54 million gallons per day

• 2009 Estimated Domestic Water Demand1.10 million gallons per day

2. EIR to study potential for recylced water use within residential unit toilets for further reduction in domestic water demand

Proposed Domestic Water SystemRevised Domestic Water Demands

Proposed Domestic Water SystemWater Tank Siting Study

Tank Siting Study1.Reviewed potential locations for water tanks based on

a. Topographyb. Elevationc. Accessd. Site plan

2.10 potential locations identified

3.Coordinated with SFPUC to determine preferred locations

Proposed Domestic Water SystemWater Tank Siting Study

Tank Siting Study1.Three potential tank sites identified

2.Location Ja. Will replace existing 1 mill. gallon tank

3.Location E & Ha. Only one tank will be needed for systemb. Location H preferredc. Both being studied in EIR

Proposed Domestic Water SystemStatus of SFPUC Coordination

Status of Planning with SFPUC

1.Conceptual Agreement;a. Water system layoutb. Domestic water demandsc. Water tank location alternativesd. System design criteria

2.Draft Letter of Agreement Pending Final Water Supply Assessment

Proposed Wastewater System2009

1. No changes to conceptual layout of the sanitary sewer system

2. Reviewed Wastewater Treatment Alternatives

Baseline System1.Headworks/Primary Sedimentation2.Secondary Treatment Using TF/SC3.MF and RO for recycled water4.UV prior to recycled use or outfall to Bay

Proposed Wastewater SystemWastewater Treatment Plan Alternatives

Alternative 11.Secondary effluent receives further treatment in constructed wetland prior to MF/RO and UV2.Wetland area will require signage and fencing.3.Water quality improved prior to outfall to Bay

Alternative 21.Disinfected effluent not recycled would be polished in wetland prior to outfall to Bay2.Wetland area would not require signage or fencing3.Water quality improved prior to outfall to Bay

Additional Options Considered

1.Membrane Bioreactors (MBR)a. Power requirements and operational costs are significantly higher

2.Wastewater Treatment Ponds (Oswald Ponds)a. Ponds would require 10 to 15-acres of area and would not be accessible to publicb. Ponds would need to be 15 to 20 feet deepc. Would need to be constructed above ground with levees due to groundwater and potential

hazardous materialsd. Levees would require significant geotechnical stabilization e. Ponds would not be compatible with proposed open space program

Proposed Wastewater SystemWastewater Treatment Plan Alternatives


1.Conceptual agreement;a. System layoutb. Sewer demandsc. System design criteria

2.Draft Letter of Agreement for wastewater system design criteria

3.Finance, design, construction and O&M of wastewater treatment plant will be the responsibility of the SFPUC

a. SFPUC in agreement with the waste water treatment plant alternatives being studied

4.SFPUC studying the potential for a cogeneration plant at the wastewater treatment plant.

5.TIDA and PUC working on terms to transfer 4-6 acres of land for demonstration scale sustainable infrastructure and technologies

Proposed Wastewater SystemStatus of Discussions with the SFPUC

Proposed Reclaimed Water System2009

1. Recycled water for irrigation and appropriate commercial plumbinga. EIR to study the potential for recycled water in residential toilets

2. Removed recycled water from YBIa. Minimal demand and significant energy to pump to higher elevations

3. Will continue to refine the layout with the SFPUC through the Master Planning phases and Final Designs

1. All treatment flows pumped to wetland area2. No treatment train3. Increased construction, energy consumption, and operation and maintenance costs

associated with number and size of lift stations.

Proposed Storm Drainage System2006

• Full array of stormwater treatment around the island –optimized to land uses and development program.

• More localized treatment around the Island• Treatment train approach – robust system with

treatment provided by horizontal development.

Proposed Storm Drainage System2009

• Multiple removal mechanisms, high treatment levels • Most flexible with phasing• Utilizes stormwater as a resource for wetland habitat

creation and educational visibility• Less pumping of storm water .

Proposed Storm Drainage SystemExamples of Treatment Elements

Roadway Bio-Retention Cells

Flow Through PlantersOpen Space Bio-Retention Cells

Pervious Pavements Wetland AreasBio-Swales


1.Conceptual agreement;a. Treatment conceptsb. System design criteria

2.Draft Letter of Agreement Pending

Proposed Wastewater SystemStatus of Discussions with the SFPUC

Off-Site Electrical Service

1. Total proposed power demand at full build out is less than the capacity of the existing system

2. No upgrades to the system required for Treasure Island development

3. SFPUC may construct optional upgrades for added reliability and redundancy.

Off-Site Electrical Service

Optional Upgrades for Reliability and Redundancy1.Improvements to Davis Substation

a. Cooling fans to increase capacityb. Connection to adjacent substation and improved switch gear for redundancy

2.Improvements to Overhead Linea. New conductor to increase capacityb. Add redundant line to existing poles to increase capacity and reliabilityc. Add underground line

3.Additional connection to PG&E system at lands end prior to connection to submarine cables.

ADDITIONAL CONNECTION TO PG&E`


1.Conceptual Agreement with the optional off-site improvements being studied in the EIR

2.Working closely with the SFPUC to finalize on-site system layout and peak loads.

Electrical ServiceStatus of Discussions with the SFPUC

• Solar Power Generation• District Energy – Central Plant• Automated Waste Collection

Energy Sustainability Alternatives

• Design-build-operate• Operators• Integrated Systems Providers• Financing Companies

Energy Sustainability AlternativesDiscussions with Industry Providers


Ground-mount1. Potential ground-mount locations


Central Heating and Cooling• Combined heat & power

Central Heating and Cooling• Centralized vs. Satellite Plant Options

Central Plant DistrictSatellite Plant Districts


Energy Sustainability AlternativesAutomated Waste Collection

Automated Waste Collection1. Discussions with Recology and Transvac

2. Turnkey system at no cost to Project

3. Equal or lower trash collection rates than traditional method

Envac

•Street Cross Section

Energy Sustainability AlternativesAutomated Waste Collection

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