Water Supply Assessment for the proposed Freedom West 2.0 Project — CleanPowerSF Sfpuc Commission, July 22, 2025

DEPARTMENT

Water Enterprise

AGENDA NO.

7 MEETING DATE

July 22, 2025

AGENDA ITEM
Public Utilities Commission
City and County of San Francisco

Calendar: Regular Calendar
Contract/Project Manager: Paula Kehoe

Approve Water Supply Assessment for the Freedom West 2.0 Project

Summary of Proposed
Commission Action:

Approve the Water Supply Assessment for the proposed Freedom West 2.0 Project, pursuant to the State of California Water Code Section 10910 et seq., California Environmental Quality Act(CEQA) Section 21151.9, and CEQA Guidelines Section 15155.

Background: The San Francisco Public Utilities Commission (SFPUC), as the entity responsible for the supply and delivery of drinking water to the City and County of San Francisco, must assess availability of water supply for new development projects under applicable state law as part of the environmental review process. California Water Code (Water Code) Sections 10910-10915) establishes a nexus between the regional land use planning process and the environmental review process. The law also reflects the growing awareness of the need to incorporate water supply and demand analysis at the earliest possible stage in the land use planning process. The core of this law is the requirement for a public water system, such as that of the SFPUC, to prepare a Water Supply Assessment (WSA) on whether available water supplies are sufficient to serve the demand generated by projects of a specified size (water demand projects), as well as the reasonably foreseeable cumulative demand in the region over the next 20 years under a range of hydrologic conditions.

The WSA is subject to Commission approval.

The San Francisco Planning Department carries out the City’s lead agency responsibilities under the California Environmental Quality Act (CEQA) and is preparing an Environmental Impact Report for the proposed Freedom West

2.0 Project (the Project). The Project will redevelop approximately 10.4 acres in the Fillmore/Western Addition neighborhood. The Project site includes two blocks and is bounded by Golden Gate Avenue to the north, Gough Street to the east, Fulton Street to the south, and Laguna Street to the west. Bethel AME Church, located at the corner of Laguna Street and Golden Gate Avenue an d 880 McAllister Street are not part of the Project. The site is currently developed with 358 units of affordable cooperative housing and surface parking spaces owned by the Freedom West Homes Corporation. The proposed project includes the replacement of the existing cooperative housing units. It will also build new residential, commercial, hotel, parking, and community facilities, including a Science, Technology, Engineering and Math (STEM) workforce training center. The Project will create public and private common spaces, including public access to a previously vacated Agenda Title: Approve Water Supply Assessment for the Freedom West 2.0 Project Commission Meeting Date: July 22, 2025

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portion of Octavia Street. Overall, the Project will include 2,876,100 gross square feet (gsf) of above ground building area consisting of: 2,614,700 gsf of residential space, 108,000 gsf of hotel space, 68,600 gsf of commercial space, 14,800 gsf of cultural, institutional, and educational space, and 63,000 gsf of podium parking. The total number of housing units is 2,291 comprising 400 co-op/affordable housing units and 1,891 market -rate units. The hotel includes a total of 150 rooms. The Project will provide approximately 56,050 gsf of public space, including 49,500 gsf of two publicly accessible blocks of Octavia Street (proposed as “Octavia Green”), between Fulton St. and Golden Gate Ave, and approximately 84,475 gsf of common space for residents.

In reviewing the Project, the Planning Department determined that it qualifies as a water demand project and therefore requires preparation of a WSA because it is a mixed-use development that includes more than 500 dwelling units.

The content of a WSA is specified by the Water Code and includes identification of any existing water supply entitlements or contracts and detailed information about groundwater supplies. It assesses the adequacy of water supplies to serve the proposed project and cumulative demand.

The WSA must be completed by the public water supplier that would serve the proposed project and be approved by its governing body at a public meeting. Approval of a WSA is not approval of the development project for which the WSA is prepared. A WSA is an informational document required to be prepared for use in the City’s environmental review of a proposed project under CEQA. The Project has already been accounted for in SFPUC’s water supply planning as described in the 2020 Urban Water Management Plan.

Furthermore, the SFPUC prepared an interim set of retail water demand projections to account for housing unit projections associated with the Housing Element 2022 Update. The Housing Element 2022 Update Environmental Impact Report, which supported the City’s adoption of the Housing Element in January 2023, assumed slightly higher housing unit projections than those used in the 2020 Urban Water Management Plan.

Because the Project has already been accounted for in the 2020 Urban Water Management Plan, the Project is also accounted for in the 2023 Interim Water Demand Projections.

The attached WSA analyzes the sufficiency of long -term water supplies to serve the Project and cumulative development over a 20- year projection. In December 2018, the State Water Resources Control Board (SWRCB) adopted amendments to the Water Quality Control Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary (Bay -Delta Plan Amendment).

The City, along with multiple other water agencies, filed suit in early 2019 challenging the validity of the Bay -Delta Plan Amendment. That lawsuit, Agenda Title: Approve Water Supply Assessment for the Freedom West 2.0 Project Commission Meeting Date: July 22, 2025

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which is consolidated with other legal challenges, is currently pending before the California Court of Appeal, Third District. In January 2021, the SWRCB moved to implement the Bay-Delta Plan Amendment on the Tuolumne River by issuing a water quality certification under Section 401 of the Clean Water Act in the Federal Energy Regulatory Commission (FERC) licensing proceedings for the hydropower projects associated with the New Don Pedro and La Grange dams. The City and other water users on the Tuolumne River filed legal and administrative challenges to these SWRCB actions. The SWRCB has since set aside the water quality certification and withdrawn it from the FERC record, and FERC has not yet reissued a license for the New Don Pedro Hydropower Project. Alongside the water quality certification, on August 8, 2022, the SWRCB issued a CEQA Notice of Preparation for an alternative means of implementing the Bay -
Delta Plan Amendment. Any
future amendments to or implementation of the Bay-Delta Plan Amendment may be subject to further legal challenges.

Recognizing the obstacles to implementing the Bay-Delta Plan Amendment, the SWRCB, by Resolution No. 2018- 0059 adopted the Bay- Delta Plan Amendment and directed SWRCB staff to help complete a “Delta watershed- wide agreement, including potential flow measures for the Tuolumne River” by March 1, 2019, and to incorporate such agreements as an “alternative” for a future amendment to the Bay-Delta Plan to be presented to the SWRCB “as early as possible after December 1, 2019.” In accordance with the SWRCB’s inst
ruction, on March 1, 2019, the SFPUC, in partnership with other key interested parties, submitted a proposed project description for the Tuolumne River that could form the basis for an agreement (Healthy Rivers and Landscapes Agreement) to the SWRCB that w ould serve as an amendment to the Bay-Delta Plan. On March 26, 2019, the SFPUC adopted Resolution No. 19-0057 to support its participation in the Healthy Rivers and Landscapes Agreement negotiation process. In November 2022, the SFPUC and partner water agencies on the Tuolumne River signed onto a non- binding Memorandum of Understanding between the State and other parties to structure their participation in the Healthy Rivers and Landscapes Agreements negotiation process. This framework document is designed to facilitate the parties’ development of enforceable agreements and amendments to the Bay- Delta Plan, with actions and funding to integrate additional water flows with the physical landscape to help improve habitat for native fish in the Sacramento -San Jo
aquin River Delta watershed,
including the Tuolumne River. On March 29, 2024, in furtherance of the Memorandum of Understanding, the SFPUC submitted the key components of its proposed Healthy Rivers and Landscapes Agreement to the SWRCB.

The SFPUC continues to actively participate in this process and as of the date of the issuance of this WSA, those negotiations remain ongoing.

Implementation of the Bay- Delta Plan Amendment is uncertain given the ongoing negotiations, litigation, and regulatory proceedings. Given the current uncertainty regarding the extent and timing of implementation of the Agenda Title: Approve Water Supply Assessment for the Freedom West 2.0 Project Commission Meeting Date: July 22, 2025

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Bay-Delta Plan Amendment, this WSA analyzes water supply and demand through 2045 under three scenarios:

• Scenario 1: No implementation of the Bay-Delta Plan Amendment • Scenario 2: Implementation of the Healthy Rivers and Landscapes Agreement
• Scenario 3: Implementation of the Bay-Delta Plan Amendment

The WSA concludes that:

• During normal years, the SFPUC’s total projected water supplies will meet the projected demands of its retail customers, including those of the Project, existing customers, and foreseeable future development under Scenario 1, Scenario 2, and Scenario 3.
• During single dry years and multiple dry years under Scenario 1, the SFPUC can meet the projected demands of its retail customers, including those of the Project, existing customers, and foreseeable future development without the need for water use reducti on beyond the level of service (LOS) goal of 20% system -wide water use reduction.
• During single dry years and multiple dry years under Scenario 2, the SFPUC would still face a shortfall, thus requiring water use reduction, but to a lesser degree and in closer alignment to the LOS goal of no more than 20% system -wide water use reduction compared to that which would occur under Scenario 3. Because negotiations in furtherance of the November 2022 Memorandum of Understanding continue in earnest, and litigation challenging the adoption of the Bay-Delta Plan Amendment remains pending, SFPUC further finds that the supply under Scenario 2 is more likely to occur than that projected in Scenario 3.
• During single dry years and multiple dry years under Scenario 3, the SFPUC cannot reliably meet the projected demands of its retail customers, including the Project, existing customers, and foreseeable future development, without water use reduction at a l
evel greater
than that required to achieve the LOS goal of a maximum of 20% system-wide average water use reduction. The SFPUC estimates it would impose up to 36% water use reductions across the retail service area.
• The SFPUC’s Water Shortage Contingency Plan describes allocation methods and processes that may be used in future droughts. For both residential and commercial customers, the SFPUC may implement varying levels of water use reductions based on the baseline level of water use, e.g., require less reduction from customers that use less water to begin with. For the Project specifically, these policies may result in lower levels of mandatory water use reduction because of the installation of water -efficient plumbing fixtures and/or non-potable water systems associated with new construction.

Agenda Title: Approve Water Supply Assessment for the Freedom West 2.0 Project Commission Meeting Date: July 22, 2025

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• Under Scenario 3, the relatively small volume of water demand generated by the Project, which demand likely will be further reduced by compliance with SFPUC’s Non- potable Water Ordinance, would not exacerbate the projected shortfalls resulting from implementation of the Bay-Delta Plan Amendment. Regardless of whether the Project is constructed, with implementation of the Bay- Delta Plan Amendment, the SFPUC’s existing and planned water suppl ies will not meet the water demands of its retail service area in dr y years without significant demand reductions.

Environmental
Review:

Approval of the Water Supply Assessment is not considered approval of a project as defined in s ection 15378 of the CEQA Guidelines. The Water Supply Assessment is required by and prepared according to the CEQA Guidelines and is an informational document only. Approval of the Water Supply Assessment does not constitute the Commission’s approval of the proposed Freedom West 2.0 Project.

Attachment: 1. Water Supply Assessment for the Freedom West 2.0 Project

PUBLIC UTILITIES COMMISSION
City and County of San Francisco

RESOLUTION NO.

WHEREAS, Under the California Environmental Quality Act (CEQA) and California Water Code Section 10910(g)(1), the San Francisco Public Utilities Commission (SFPUC) is required to prepare and approve a Water Supply Assessment of whether available water supplies are sufficient to serve the demand generated by projects of a specified size as well as the reasonably foreseeable cumulative demand in the region over the next 20 years under a range of hydrologic conditions; and

WHEREAS, The Freedom West 2.0 Project (Project) proposes to replace the existing cooperative housing units and will build 2,291 housing units across 2,614,700 gross square feet (gsf) of residential space, 150 hotel rooms across 108,000 gsf of hotel space, 68,600 gsf of commercial space, 14,800 gsf of cultural, institutional, and educational space, 63,000 gsf of podium parking, and 56,050 gsf of public space; and

WHEREAS, The Project requires the preparation of a Water Supply A ssessment because it is a mixed-use development that includes more than 500 dwelling units; and

WHEREAS, A Water Supply Assessment must be completed by the public water supplier that would serve the proposed project and be approved by its governing body at a public meeting; and

WHEREAS, A Water Supply Assessment is an informational document that assesses the adequacy of water supplies to serve a proposed project and is required to be prepared as part of the CEQA environmental review process; and

WHEREAS, The water demand associated with the Project is encompassed within the 2020 Urban Water Management Plan water demand projections; and

WHEREAS, The water demand associated with the Project is also encompassed within the 2023 Interim Water Demand Projections, which the SFPUC prepared after the 2020 Urban Water Management Plan to account for slightly higher housing unit projections associat ed with the Housing Element 2022 Update adopted by the City; and

WHEREAS, Approval of a Water Supply Assessment is not considered an approval action as defined in Section 15378 of the CEQA Guidelines and approval of the Water Supply Assessment does not constitute the Commission’s approval of the proposed Project; and

WHEREAS, SFPUC staff prepared the attached Water Supply Assessment for the Project, analyzing water supply and demand under three scenarios: (1) No implementation of the Bay- Delta Plan Amendment (Scenario 1), (2) Implementation of the Healthy Rivers and Landscapes

Agreement (Scenario 2), and (3) Implementation of the Bay-Delta Plan Amendment (Scenario 3); and

WHEREAS, The Water Supply Assessment concludes that the SFPUC’s total projected water supplies through 2045 will (1) meet the demands of the Project in normal years under all three scenarios, (2) meet the demands of the Project in dry years without rationi ng beyond the SFPUC’s level of service (LOS) goal of no more than 20% system-wide rationing under Scenario 1, (3) require water use reduction but to a lesser degree and in closer alignment to the LOS goal of no more than 20% system -wide water use reduction under Scenario 2 and in comparison to Scenario 3; and (4) not reliably meet the projected demands of the Project without rationing at a level greater than that required to achieve the LOS goal under Scenario 3; and

WHEREAS, In dry years, the P roject may have lower levels of mandatory water use reduction compared to existing buildings because of the installation of water -efficient plumbing fixtures and/or non-potable water systems associated with new construction; and

WHEREAS, The Project is required to comply with the City’s Non- potable Water Ordinance, Article 12C of the San Francisco Health Code or obtain an exemption from the City; and

WHEREAS, The relatively small volume of water demand generated by the P roject itself would not exacerbate the projected shortfalls resulting from implementation of the Bay-Delta Plan Amendment; now, therefore, be it

RESOLVED, This Commission hereby approves the attached Water Supply Assessment for the Freedom West 2.0 Project pursuant to the California Water Code Section 10910(g).

I hereby certify that the foregoing resolution was adopted by the San Francisco Public Utilities Commission at its meeting of July 22, 2025.

Director of Commission Affairs
San Francisco Public Utilities Commission

OUR MISSION: To provide our customers with high-quality, efficient and reliable water, power and sewer services in a manner that values environmental and community interests and sustains the resources entrusted to our care.

525 Golden Gate Avenue, 13th Floor
San Francisco, CA 94102
T 415.554.3155
F 415.554.3161
TTY 415.554.3488

DATE: Ju ne 23, 2025

TO: Commissioner Kate H. Stacy, President
Commissioner Joshua Arce, Vice President
Commissioner Avni Jamdar
Commissioner Steve Leveroni
Commissioner Meghan Thurlow

THROUGH: Dennis J. Herrera, General Manager

FROM: Steven R. Ritchie, Assistant General Manager, Water

SUBJECT: Water Supply Assessment for Freedom West 2.0

1.0 Introduction
The California Water Code (Sections 10910 through 10915) requires urban water suppliers like the San Francisco Public Utilities Commission (SFPUC) to furnish a Water Supply Assessment (WSA) to the city or county that has jurisdiction to approve the environmental documentation for certain qualifying projects (as defined in Water Code Section 10912(a)) subject to the California Environmental Quality Act (CEQA). The WSA process typically relies on information contained in a water supplier’s Urban Water Management Plan and involves answering specific questions related to the estimated water demand of the proposed project. This memo serves as the WSA for the Freedom West 2.0 Project located at 710 McAllister Street, 889 McAllister Street, 735 Gough Street, and 550 Fulton Street (proposed project), for use in the preparation of an environmental impact report by the San Francisco Planning Department (Case No. 2020-006887ENV, San Francisco Planning Department).

1.1 2020 Urban Water Management Plan and 2023 Interim Water Demand Projections
The SFPUC Commission (Commission), by Resolution No. 21-0100, adopted the 2020 Urban Water Management Plan (UWMP) for the City and County of San Francisco. The water demand projections in the UWMP incorporated housing unit growth projections from the Housing Element 2022 Update objective and employment growth projections from the 2017 Land Use Allocation (LUA 2017) with the San Francisco Planning Department providing both projections. Since the SFPUC’s adoption of the 2020 UWMP in June 2021, the Planning Commission certified the Housing Element 2022 Update Environmental Impact Report (Housing Element EIR) in November 2022. The Housing Element EIR, which supported the City’s adoption of the Housing Element in January 2023, assumed slightly higher housing unit projections than those used in the 2020 UWMP, but was still in line with the objective to produce an average of 5,000 housing units per year. Nonetheless, because of the slightly higher housing unit projections associated with the Housing Element

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EIR, the SFPUC determined that its 2020 UWMP no longer accounted for all projected retail water demands.

The SFPUC will not be updating its 2020 UWMP until the next five-year cycle, which is anticipated to begin in 2025. Therefore, during this interim period, the SFPUC has prepared the 2023 Interim Water Demand Projections (Attachment A) to document the SFPUC’s projected retail water supplies when compared to projected retail water demands associated with the adopted Housing Element 2022 Update. The San Francisco Planning Department provided the updated housing unit projections for SFPUC to update its water demand projections.

The water demand projections are presented in five-year increments through 2045, meeting Water Code requirements.

Growth associated with the proposed project was encompassed within the growth projections used in the 2020 UWMP, and therefore encompassed within the updated growth projections used in the 2023 Interim Water Demand Projections. Consequently, water demand associated with the proposed project was encompassed within the water demand projections in the 2020 UWMP, and therefore encompassed within the 2023 Interim Water Demand Projections. In other words, the proposed project has already been accounted for in SFPUC’s water supply planning.

The WSA for a qualifying project within the SFPUC’s retail service area may use information from the UWMP and, as applicable, the 2023 Interim Water Demand Projections. Therefore, the 2020 UWMP and 2023 Interim Water Demand Projections are incorporated by reference throughout this WSA, as shown in bold, italicized text. The 2020 UWMP and 2023 Interim Water Demand Projections may be accessed at www.sfpuc.gov/uwmp .

As described in detail in Section 7.3.1 of the UWMP, in December 2018, the State Water Resources Control Board (SWRCB) adopted amendments to the Water Quality Control Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary (Bay-Delta Plan Amendment). The City, along with multiple other water agencies, filed suit in early 2019 challenging the validity of the Bay-Delta Plan Amendment. That lawsuit, which is consolidated with other legal challenges, is currently pending before the California Court of Appeal, Third District. In January 2021, the SWRCB moved to implement the Bay-Delta Plan Amendment on the Tuolumne River by issuing a water quality certification under Section 401 of the Clean Water Act in the Federal Energy Regulatory Commission (FERC) licensing proceedings for the hydropower projects associated with the New Don Pedro and La Grange dams. The City and other water users on the Tuolumne River filed legal and administrative challenges to these SWRCB actions. The SWRCB has since set aside the water quality certification and withdrawn it from the FERC record, and FERC has not yet reissued a license for the New Don Pedro Hydropower Project. Alongside the water quality certification, on August 8, 2022, the SWRCB issued a CEQA Notice of Preparation for an alternative means of implementing the Bay-Delta Plan Amendment. Any future amendments to or implementation of the Bay- Delta Plan Amendment may be subject to further legal challenges.

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Recognizing the obstacles to implementing the Bay-Delta Plan Amendment, the SWRCB, by Resolution No. 2018-0059 adopting the Bay-Delta Plan Amendment, directed staff to help complete a “Delta watershed-wide agreement, including potential flow measures for the Tuolumne River” by March 1, 2019, and to incorporate such agreements as an “alternative” for a future amendment to the Bay-Delta Plan to be presented to the SWRCB “as early as possible after December 1, 2019.” In accordance with the SWRCB’s instruction, on March 1, 2019, the SFPUC, in partnership with other key interested parties, submitted a proposed project description for the Tuolumne River that could form the basis for an agreement (Healthy Rivers and Landscapes Agreement) with the SWRCB that would serve as an amendment to the Bay-Delta Plan. On March 26, 2019, the SFPUC adopted Resolution No. 19-0057 to support its participation in the Healthy Rivers and Landscapes Agreement negotiation process. In November 2022, the SFPUC and partner water agencies on the Tuolumne River signed onto a non-binding Memorandum of Understanding between the State and other parties to structure their participation in the Healthy Rivers and Landscapes Agreements negotiation process. This framework document is designed to facilitate the parties’ development of enforceable agreements and amendments to the Bay- Delta Plan, with actions and funding to integrate additional water flows with the physical landscape to help improve habitat for native fish in the Sacramento- San Joaquin River Delta watershed, including the Tuolumne River. On March 29, 2024, in furtherance of the memorandum of understanding, the SFPUC submitted the key components of its proposed Healthy Rivers and Landscapes Agreement to the SWRCB. The SFPUC continues to actively participate in this process and as of the date of the issuance of this Water Supply Assessment, those negotiations remain ongoing.

Implementation of the Bay-Delta Plan Amendment is uncertain given the ongoing negotiations, litigation, and regulatory proceedings. Given the current uncertainty regarding the extent and timing of the implementation of the Bay- Delta Plan Amendment, this WSA analyzes water supply and demand through 2045 under three scenarios:

1. Scenario 1: No implementation of the Bay-Delta Plan Amendment

2. Scenario 2: Implementation of the Healthy Rivers and Landscapes Agreement

3. Scenario 3: Implementation of the Bay-Delta Plan Amendment

1.2 Basis for Requiring a WSA for the Proposed Project
The proposed project qualifies for preparation of a WSA under Water Code Section 10912(a) because it is a mixed-use development that includes more than 500 dwelling units. The proposed project is characterized further in Section 1.3.

1.3 Proposed Project Description
The proposed project consists of the redevelopment of approximately 10.4 acres in the Fillmore/Western Addition neighborhood. The proposed project site includes two blocks and is bounded by Golden Gate Avenue to the north, Gough Street to the east, Fulton Street to the south, and Laguna Street to the

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west. Bethel AME Church, located at the corner of Laguna Street and Golden Gate Avenue, and 880 McAllister are not part of the proposed project.

The site is currently developed with 358 units of affordable cooperative housing and surface parking spaces owned by the Freedom West Homes Corporation.

The proposed project includes the replacement of the existing cooperative housing units. It will also build new residential, commercial, hotel, parking, and community facilities, including a Science, Technology, Engineering and Math (STEM) workforce training center. The Project will create public and private common spaces, including public access to a previously vacated portion of Octavia Street.

Overall, the Project will include 2,876,100 gross square feet (gsf) of above ground building area consisting of: 2,614,700 gsf of residential space, 108,000 gsf of hotel space, 68,600 gsf of commercial space, 14,800 gsf of cultural, institutional, and educational space, and 63,000 gsf of podium parking. The total number of housing units is 2,291 comprising 400 co-op/affordable housing units and 1,891 market-rate units. The hotel includes a total of 150 rooms. The Project will provide approximately 56,050 gsf of public space, including 49,500 gsf of two publicly accessible blocks of Octavia Street (proposed as “Octavia Green”), between Fulton St. and Golden Gate Ave, and approximately 84,475 gsf of common space for residents.

For additional details on the proposed project, see Attachment B.

2.0 Water Supply
This section reviews San Francisco’s existing and planned water supplies.

2.1 Regional Water System
See Section 3.1 of the 2020 UWMP for descriptions of the San Francisco Regional Water System (RWS), Section 6.1 of the 2020 UWMP for water rights held by City and County of San Francisco, and Section 7.1 of the 2020 UWMP for the SFPUC Water System Improvement Program.

2.2 Existing Retail Supplies
Retail water supplies from the RWS are described in Section 6.1 of the 2020 UWMP.

Local groundwater supplies, including the Westside Groundwater Basin, and recycled water supplies, including the Harding Park Recycled Water Project and Pacifica Recycled Water Project, are described in Section 6.2 of the 2020 UWMP.

2.3 Planned Retail Water Supply Sources
The San Francisco Groundwater Supply Project is described in Section 6.2.1.1 of the 2020 UWMP.

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The Westside and Treasure Island Recycled Water Projects are described in Section 6.2.2 of the 2020 UWMP.

2.4 Summary of Current and Future Retail Water Supplies A breakdown of water supply sources for meeting SFPUC retail water demand through 2045 in normal years is provided in Section 6.2.5 of the 2020 UWMP.

For planning purposes, the SFPUC defines “normal year” as based on historical hydrology under conditions that allow the reservoirs to be filled over the course of the snowmelt season, allowing full deliveries to customers.

Normal year supplies include, but are not limited to, RWS supply, groundwater, and recycled water. For dry-year supplies, see the next section.

2.5 Dry-Year Water Supplies
The SFPUC undertook several water supply projects through the Water System Improvement Program to meet dry-year demands with no greater than 20 percent system-wide rationing in any one year. Descriptions of these dry- year supplies are provided in Section 7.2 of the 2020 UWMP.

2.6 Additional Water Supplies
The SFPUC is increasing and accelerating its efforts to acquire additional water supplies and explore other projects that would increase overall water supply resilience through the Alternative Water Supply Program. A description of this program and the supplies being studied is provided in Section 7.4 of the 2020 UWMP.

3.0 Water Demand
This section reviews the projected retail water demands and the demand associated with the proposed project.

3.1 Projected Retail Water Demand
The projected retail water demand through 2045 is described in Section 4.1 of the 2020 UWMP and updated in the 2023 Interim Water Demand Projections (Attachment A). This section of the 2020 UWMP also describes the methodology used for demand projections and the factors considered.

Updates specific to the change in housing unit projections are described in the 2023 Interim Water Demand Projections.

3.2 Proposed Project Water Demand
The project sponsor provided a memo describing the methods and assumptions used to estimate the water demand of the proposed project, along with the resulting demand (Attachment B).

Because the proposed project must comply with San Francisco’s Non-potable Water Ordinance (Article 12C of the San Francisco Health Code) except for areas that are exempt such as 100% affordable housing or otherwise exempted by the City, estimates for both potable and non-potable demands

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were submitted as part of the WSA request. The Non-potable Water Ordinance requires new development projects with 100,000 square feet or more of gross floor area, that apply for a site permit after January 1, 2022, to install and operate an onsite non-potable water system. Commercial buildings must meet their toilet and urinal flushing and drain trap priming demands through the collection, treatment, and use of available blackwater and condensate.

Residential and mixed-use buildings must meet their toilet and urinal flushing, irrigation, clothes washing, and drain trap priming demands through the collection, treatment, and use of available graywater and condensate. While not required, residential and mixed-use projects may use treated blackwater if desired. As indicated in the water demand memo provided on behalf of the project sponsor in Attachment B, the proposed project would meet the requirements of the Non-potable Water Ordinance by using alternate supplies, e.g., graywater and condensate to meet toilet and urinal flushing, drain trap priming, and irrigation demands.

Both potable and non-potable demands for the project were estimated using the SFPUC’s Non-potable Water Calculator. The SFPUC reviewed the memo to ensure that the methodology is appropriate for the types of proposed water uses, the assumptions are valid and thoroughly documented along with verifiable data sources, and a professional standard of care was used. The SFPUC concluded that the demand estimates provided on behalf of the project sponsor are reasonable. Water demand associated with the proposed project over the 20-year planning horizon is shown in Table 1.

The non-potable demand estimates in Table 1 are based on building uses anticipated at the time the WSA was requested, i.e., during the planning and environmental review stage of the proposed project. It is understood that these estimates will likely change as the proposed project’s design progresses, and information submitted for the WSA request is not part of the proposed project’s compliance with the Non-potable Water Ordinance. City review and approval of a proposed onsite water system must be performed separately through the Non-potable Water Program. However, the intent of providing a breakdown of potable and non-potable demand estimates in this WSA is to demonstrate that the proposed project will incorporate water reuse in compliance with City requirements and the proposed project’s sustainability goals, if any. As noted above in Section 1.1, the total demand of the proposed project, regardless of non-potable use, is already encompassed in the 2020 UWMP and the 2023 Interim Water Demand Projections. Furthermore, total demand represents the most conservative estimate and includes back-up potable supplies that must be provided by the SFPUC if non-potable supplies serving the proposed project are unavailable.

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Table 1: Net Water Demand Based on Project Phasing
2025 2030 2035 2040 2045
Potable Demand (mgd) -- 0.04 0.12 0.12 0.12
Non-potable Demand (mgd) -- 0.02 0.05 0.05 0.05
Total Demand (mgd) -- 0.06 0.17 0.17 0.17
Potential Potable Water
Savings as Percentage of
Total Demand -- 33% 29% 29% 29%
Existing Site Demand (mgd) 0.05
Net New Water Demand
(mgd) -- 0.01 0.12 0.12 0.12
mgd = million gallons per day

Notes:

1. Total demand conservatively assumes that all demands are met with potable supplies.

2. Existing site demands averaged over the most recent 5-year period. Existing demands are subtracted from total projected water demands to show the incremental increase in demands associated with the project (i.e., the net increase in water demand).

The San Francisco Planning Department has determined that the proposed project is encompassed within the housing projections described in the Housing Element 2022 Update and the employment projections from LUA 2017, as indicated in the letter from the Planning Department to the SFPUC (Attachment B). Therefore, the demand of the proposed project is also encompassed within the San Francisco retail water demands that are presented in the 2023 Interim Water Demand Projections, which considers retail water demand based on the housing and employment projections provided by the Planning Department. The following Table 2 shows the demand of the proposed project relative to total retail demand.

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Table 2: Proposed Project Demand Relative to Total Retail Demand 2025 2030 2035 2040 2045
Total Retail Demand
(mgd)1 -- 73.0 75.0 77.9 81.1
Net New Demand of
Proposed Project (mgd) -- 0.01 0.12 0.12 0.12
Total Demand of
Proposed Project as
Percentage of Total
Retail Demand2 -- 0.014% 0.16% 0.15% 0.15%
Notes:

1. Retail water demands are provided in Table 3 of the 2023 Interim Water Demand Projections.

2. The proposed project is accounted for in the housing and employment projections provided by the Planning Department; therefore, total demands associated with the proposed project are accounted for in the 2023 Interim Water Demand Projections.

4.0 Conclusion

4.1 Comparison of Projected Supply and Demand
For all scenarios presented here, local supplies (i.e., supplies not from the RWS) correspond to those in Table 6-5 of the 2020 UWMP. Procedures for determining RWS supply availability according to the SFPUC’s Water Shortage Allocation Plan are described in Section 8.2.4 of the 2020 UWMP.

As explained previously in Section 3.2, water demands associated with the proposed project are already captured in the retail demand projections presented in the 2020 UWMP and the 2023 Interim Water Demand Projections.

The proposed project is expected to represent up to 0.16% of the total retail water demand. Total retail demands correspond to those in Table 3 of the 2023 Interim Water Demand Projections and reflect both passive and active conservation, onsite water reuse savings, and water loss.

4.1.1 Scenario 1: No Implementation of the Bay-Delta Plan Amendment Table 3 below is adapted from Table 5 of the 2023 Interim Water Demand Projections and compares the SFPUC’s retail water supplies and demands through 2045 during normal year, single dry year, and multiple dry years under Scenario 1. Under this scenario without implementation of the Bay-Delta Plan Amendment, existing and planned supplies would meet all projected RWS demands in all years. Even though system-wide shortages of RWS supplies would occur in the 4
th and 5th years of a multi-year drought in 2045 projected levels of demand, retail customers would reduce their demands by 5% as required by the Water Supply Agreement between SFPUC and its Wholesale

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Customers. To achieve a small reduction such as this, the SFPUC may prohibit certain discretionary outdoor water uses and/or call for voluntary water use reduction by its retail customers pursuant to its Water Shortage Contingency Plan (Appendix K of the 2020 UWMP). The required level of water use reduction is well below the SFPUC’s RWS level of service (LOS) goal of limiting water use reduction to no more than 20% on a system-wide basis (i.e., an average throughout the RWS) in drought years. The LOS goal was adopted by the Commission in 2008 through Resolution No. 08-0200.

4.1.2 Scenario 2: Implementation of the Healthy Rivers and Landscapes Agreement
The Healthy Rivers and Landscapes Agreement has yet to be accepted by SWRCB as an alternative to the Bay-Delta Plan Amendment and thus the shortages that would occur with its implementation are not known with certainty. However, given that the objectives of the Healthy Rivers and Landscapes Agreement are to provide fishery improvements while protecting water supply through flow and non-flow measures, the RWS supply shortfalls under the Healthy Rivers and Landscapes Agreement would be less than those under the Bay-Delta Plan Amendment, and therefore would require water use reductions of a lesser degree than that which would occur under Scenario 3.

The degree of water use reduction would also more closely align with the SFPUC’s RWS LOS goal of limiting water use reduction to no more than 20% on a system-wide basis in drought years.

4.1.3 Scenario 3: Implementation of the Bay-Delta Plan Amendment Table 4 below provides projected supplies and demands under Scenario 3. The RWS is projected to experience significant shortfalls in single dry and multiple dry years through 2045, regardless of whether the proposed project is constructed. These significant shortfalls are a result of implementation of the Bay-Delta Plan Amendment and not attributed to the incremental retail demand associated with the proposed project. Shortfalls would range from about 11 to 29 mgd, corresponding to water use reduction in the retail service area ranging from approximately 15-36%, over the next 20 years.

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Table 3: Projected Supply and Demand Comparison Under Scenario 1 (No Implementation of the Bay-Delta Plan Amendment) (mgd)

Normal
Year
Single
Dry
Year1
Multiple Dry Years2
Year 1 Year 2 Year 3 Year 4 Year 5
2025
Total Retail Demand3 71.3 71.3 71.3 71.3 71.3 71.3 71.3 Total Retail Supply4 71.3 71.3 71.3 71.3 71.3 71.3 71.3 Shortfall 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Shortfall as % of
Demand 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
2030
Total Retail Demand3 73.0 73.0 73.0 73.0 73.0 73.0 73.0 Total Retail Supply4 73.0 73.0 73.0 73.0 73.0 73.0 73.0 Shortfall 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Shortfall as % of
Demand 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
2035
Total Retail Demand3 75.0 75.0 75.0 75.0 75.0 75.0 75.0 Total Retail Supply4 75.0 75.0 75.0 75.0 75.0 75.0 75.0 Shortfall 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Shortfall as % of
Demand 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
2040
Total Retail Demand3 77.9 77.9 77.9 77.9 77.9 77.9 77.9 Total Retail Supply4 77.9 77.9 77.9 77.9 77.9 77.9 77.9 Shortfall 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Shortfall as % of
Demand 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
2045
Total Retail Demand3, 5 81.1 81.1 81.1 81.1 81.1 77.0 77.0 Total Retail Supply4 81.1 81.1 81.1 81.1 81.1 81.1 81.1 Shortfall 0.0 0.0 0.0 0.0 0.0 4.1 4.1
Shortfall as % of
Demand 0.0% 0.0% 0.0% 0.0% 0.0% 5.3% 5.3%
Notes:

1. During all single dry years, no RWS system-wide shortages are in effect.

2. During multiple dry years, no RWS system-wide shortages are in effect until years 4 and 5 at 2045 levels of demand. During those years, a 10% system-wide shortage is in effect.

3. Total retail demands correspond to those in Table 3 of the 2023 Interim Water Demand Projections.

4. Total retail supplies correspond to those in Table 5 of the 2023 Interim Water Demand Projections.

5. As amended in 2018, Section 2.1 of the Water Shortage Allocation Plan requires retail customers to conserve a minimum of 5% during droughts. If, during a declared water shortage, retail demands on the RWS are lower than the retail allocation in a dry year, retail demands on the RWS will be reduced by 5%. This provision is in effect in years 4 and 5 of a multi-dry year sequence at 2045 levels of demand.

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Table 4: Projected Supply and Demand Comparison Under Scenario 3 (Implementation of the Bay-Delta Plan Amendment) (mgd)

Normal
Year
Single
Dry
Year1
Multiple Dry Years2
Year 1 Year 2 Year 3 Year 4 Year 5
2025
Total Retail Demand3 71.3 71.3 71.3 71.3 71.3 71.3 71.3 Total Retail Supply4 71.3 59.5 59.5 51.5 51.5 51.5 51.5 Shortfall 0.0 -11.8 -11.8 -19.8 -19.8 -19.8 -19.8
Shortfall as % of Demand 0.0% -16.5% -16.5% -27.8% -27.8% -27.8% -27.8% 2030
Total Retail Demand3 73.0 73.0 73.0 73.0 73.0 73.0 73.0 Total Retail Supply4 73.0 61.4 61.4 53.4 53.4 53.4 53.4 Shortfall 0.0 -11.6 -11.6 -19.6 -19.6 -19.6 -19.6
Shortfall as % of Demand 0.0% -15.9% -15.9% -26.8% -26.8% -26.8% -26.8% 2035 Total Retail Demand3 75.0 75.0 75.0 75.0 75.0 75.0 75.0 Total Retail Supply4 75.0 63.8 63.8 55.5 55.5 55.5 51.4 Shortfall 0.0 -11.2 -11.2 -19.5 -19.5 -19.5 -23.6
Shortfall as % of Demand 0.0% -14.9% -14.9% -26.0% -26.0% -26.0% -31.5% 2040
Total Retail Demand3 77.9 77.9 77.9 77.9 77.9 77.9 77.9 Total Retail Supply4 77.9 66.4 66.4 57.9 57.9 52.0 52.0 Shortfall 0.0 -11.5 -11.5 -20.0 -20.0 -25.9 -25.9
Shortfall as % of Demand 0.0% -14.8% -14.8% -25.7% -25.7% -33.2% -33.2% 2045
Total Retail Demand3 81.1 81.1 81.1 81.1 81.1 81.1 81.1 Total Retail Supply4 81.1 60.1 60.1 60.1 60.1 52.1 52.1 Shortfall 0.0 -21.0 -21.0 -21.0 -21.0 -29.0 -29.0
Shortfall as % of Demand 0.0% -25.9% -25.9% -25.9% -25.9% -35.8% -35.8% Notes:

1. During a single dry year, system-wide shortages of 30-40% are in effect (see Table 8-3 of the 2020 UWMP). For this analysis, shortages greater than 20% are considered to have the same retail/wholesale allocation as the maximum Stage 4, 16-20% system-wide shortage in the Water Shortage Allocation Plan.

2. During multiple dry years, system-wide shortages of 30-55% are in effect (see Table 8-3 of the 2020 UWMP). For this analysis, shortages greater than 20% are considered to have the same retail/wholesale allocation as the maximum Stage 4, 16-20% system-wide shortage in the Water Shortage Allocation Plan.

3. Total retail demands correspond to those in Table 3 of the 2023 Interim Water Demand Projections.

4. Total retail supplies correspond to those in Table 4 of the 2023 Interim Water Demand Projections with a correction made for volumes shown in the Normal Year column. The 2023 Interim Water Demand Projections has a typo which was revised in this table to show that total retail demand equals total retail supply for the Normal Year; the shortfall between demand and supply is unchanged (i.e., zero).

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4.2 Potential for Shortages in SFPUC Service Area
The inflow to SFPUC reservoirs can vary greatly from year to year, based on the hydrology of the region. When inflows are low during dry years, the potential exists for water supply shortages in the SFPUC service area. The occurrence of shortages depends on the magnitude and duration of dry conditions, and on the system demand for water supply.

• In an evaluation of historical hydrology (1920 – 2017) combined with 2020 system demand, the potential for water supply shortages due to dry hydrology is low.
• When projected system demand in 2045 (an increase over 2020 demand) is evaluated along with historical hydrology, the potential for shortage increases but remains relatively low.
• When large increases in instream flow requirements (such as those associated with the Bay-Delta Plan update) are included in either of the above evaluations, the potential for water shortages in the SFPUC system increases markedly. The instream flow requirements are analogous to an increase in demand in this evaluation.

4.3 Water Use Reduction Implications to the Proposed Project While the levels of water use reduction described above apply to the retail service area (i.e., approximately 15-36% under Scenario 3), the SFPUC may allocate different levels of water use reduction to individual retail customers based on customer type (e.g., dedicated irrigation, single family residential, multi-family residential, commercial) to achieve the required level of retail system-wide demand reduction. Allocation methods and processes that have been considered in the past and may be used in future droughts are described in the SFPUC’s Water Shortage Contingency Plan (Appendix K of the 2020 UWMP). For both residential and commercial customers, the SFPUC may implement varying levels of water use reductions based on the baseline level of water use, e.g., require less reduction from customers that use less water to begin with. Under the Water Shortage Contingency Plan, the allocation method or combination of methods that would be applied during water shortages caused by drought would be subject to the discretion of the General Manager.

In accordance with the Water Shortage Contingency Plan, the level of water use reduction that would be imposed on the proposed project would be determined at the time of a drought or other water shortage and cannot be established with certainty prior to the shortage event. However, newly constructed buildings, such as the proposed project, have water-efficient fixtures and non-potable water systems that comply with the latest regulations and should be better prepared than older buildings to meet the required reductions.

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4.4 Findings
Regarding the availability of water supplies to serve the proposed project beginning in 2030, the SFPUC finds, based on the entire record before it, as follows:

• During normal years, the SFPUC’s total projected water supplies will meet the projected demands of its retail customers, including those of the proposed project, existing customers, and foreseeable future development under Scenario 1, Scenario 2, and Scenario 3. • During single dry years and multiple dry years under Scenario 1—No implementation of the Bay-Delta Plan Amendment or the Healthy Rivers and Landscapes Agreement—the SFPUC can meet the projected demands of its retail customers, including those of the proposed project, existing customers, and foreseeable future development without the need for water use reduction beyond the LOS goal of 20% system-wide water use reduction.
• During single dry years and multiple dry years under Scenario 2— Implementation of the Healthy Rivers and Landscapes Agreement—the SFPUC would still face a shortfall in single dry and multiple dry years, thus requiring water use reduction, but to a lesser degree and in closer alignment to the LOS goal of no more than 20% system-wide water use reduction compared to that which would occur under Scenario 3.

Because negotiations in furtherance of the November 2022 Memorandum of Understanding continue in earnest, and litigation challenging the adoption of the Bay-Delta Plan Amendment remains pending, SFPUC further finds that the supply under Scenario 2 is more likely to occur than that projected in Scenario 3.
• During single dry years and multiple dry years under Scenario 3— Implementation of the Bay-Delta Plan Amendment—the SFPUC cannot reliably meet the projected demands of its retail customers, including the proposed project, existing customers, and foreseeable future development, without water use reduction at a level greater than that required to achieve the LOS goal of a maximum of 20% system-wide average water use reduction. The SFPUC estimates it would impose up to 36% water use reductions across the retail service area. • The SFPUC’s Water Shortage Contingency Plan describes allocation methods and processes that may be used in future droughts. For both residential and commercial customers, the SFPUC may implement varying levels of water use reductions based on the baseline level of water use, e.g., require less reduction from customers that use less water to begin with. For the proposed project specifically, these policies may result in lower levels of mandatory water use reduction because of the installation of water-efficient plumbing fixtures and non-potable water systems associated with new construction.

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• Under Scenario 3, the relatively small volume of water demand generated by the proposed project, which demand will be further reduced by compliance with SFPUC’s Non-potable Water Ordinance, would not exacerbate the projected shortfalls resulting from implementation of the Bay-Delta Plan Amendment. Regardless of whether the proposed project is constructed, with implementation of the Bay-Delta Plan Amendment, the SFPUC’s existing and planned water supplies will not meet the water demands of its retail service area in dry years without significant demand reductions.

While this WSA contains information provided by or on behalf of the project sponsor regarding the proposed project’s plans for onsite water reuse and demand estimates using the SFPUC’s Non-potable Water Calculator, any information submitted to the SFPUC for preparation of this WSA does not fulfill the requirements of the Non-potable Water Ordinance. City review and approval of a proposed onsite water system must be performed separately through the Non-potable Water Program.

Approval of this WSA by the Commission is not equivalent to approval of the development project for which the WSA is prepared. A WSA is an informational document required to be prepared for use in the City’s environmental review of a project under CEQA. It assesses the adequacy of water supplies to serve the proposed project and cumulative demand.

Furthermore, this WSA is not a “will serve” letter and does not verify the adequacy of existing distribution system capacity to serve the proposed project.

A “will serve” letter and/or hydraulic analysis must be requested separately from the SFPUC City Distribution Division to verify hydraulic capacity.

If there are any questions or concerns, please contact Steve Ritchie at (415) 934-5736 or [email protected]
.

Attachments: Attachment A, 2023 Interim Water Demand Projections Attachment B, Freedom West 2.0 Project Demand Memo

Attachment A –
2023 Interim Water Demand Projections

2023 Interim Water Demand
Projections
for the City and County of San Francisco

Prepared by:

San Francisco Public Utilities Commission

September 2023

San Francisco Public Utilities Commission

2023 Interim Water Demand Projections i
Table of Contents

1.0 Introduction ......................................................................................................................................... 1

1.1 Purpose of Water Supply Assessments ........................................................................................ 1

1.2 Purpose of this Document ............................................................................................................. 1

1.3 What this Document Does and Does Not Address ....................................................................... 1

2.0 Housing Unit Projections ................................................................................................................... 2

3.0 Retail Water Demands ........................................................................................................................ 2

4.0 Water Supply and Demand Comparisons ........................................................................................ 5

4.1 With Bay-Delta Plan Amendment .................................................................................................. 5

4.2 Without Bay-Delta Plan Amendment............................................................................................. 5

List of Tables
Table 1: Housing Unit Projections ................................................................................................................. 2 Table 2: Multi-Family Residential Water Demands (million gallons per day [mgd]) ..................................... 3 Table 3: Retail Water Demands (mgd) ......................................................................................................... 4 Table 4: Retail Supply and Demand Comparison for Projected Normal & Dry Year Scenarios With Bay- Delta Plan Amendment (mgd) ....................................................................................................................... 6 Table 5: Retail Supply and Demand Comparison for Projected Normal & Dry Year Scenarios Without Bay- Delta Plan Amendment (mgd) ....................................................................................................................... 8

List of Appendices
Appendix A: San Francisco Planning Memorandum
Appendix B: Woodard & Curran Memorandum

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2023 Interim Water Demand Projections 1

1.0 Introduction

1.1 Purpose of Water Supply Assessments
The California Water Code (Sections 10910 through 10915) requires urban water suppliers to evaluate water supply availability to inform environmental review for qualifying projects ("water demand projects") defined in Water Code Section 10912(a). Water Code Section 10910 requires the preparation of a "water supply assessment" (WSA) for water demand projects that include a determination of whether available water supplies are sufficient to serve the demand generated by the project, as well as reasonably foreseeable cumulative demand over a 20 year period, including years of normal precipitation, single dry, and multiple dry years. If the water supplies needed by a water demand project were accounted for in the water supplier's most recently adopted Urban Water Management Plan (UWMP), under Water Code Section 10910(c)(2), the water supplier may incorporate the requested information from the UWMP in preparing a WSA for a water demand project.

1.2 Purpose of this Document
The SFPUC most recently adopted the 2020 UWMP update for the City and County of San Francisco in June 2021. As described in the 2020 UWMP, Section 4.1.2, Projected Retail Demands, the 2020 UWMP relied on the San Francisco Planning Department's (SF Planning) housing projections based on the Housing Element 2022 Update, which was still under development when the 2020 UWMP was adopted.

One of the objectives of the Housing Element 2022 Update was to produce an average of 5,000 housing units per year with adjustments for certain large development plans. Since the SFPUC’s adoption of the 2020 UWMP in June 2021, the Planning Commission certified the Housing Element 2022 Update Environmental Impact Report (Housing Element EIR) in November 2022. The Housing Element EIR, which supported the City’s adoption of the Housing Element in January 2023, assumed slightly higher housing unit projections than those used in the 2020 UWMP, but was still in line with the objective to produce an average of 5,000 housing units per year. Nonetheless, as a result of the slightly higher housing unit projections associated with the Housing Element EIR, the SFPUC determined that its 2020 UWMP no longer accounted for all projected retail water demands.

The SFPUC will not be updating its UWMP until 2025. Therefore, during this interim period, the SFPUC has prepared the 2023 Interim Water Demand Projections herein to document the SFPUC’s projected retail water supplies when compared to projected retail water demands associated with the adopted Housing Element 2022 Update. This document also adjusts the retail water supply projections to meet the updated retail water demands.

The information in this document, in concert with the background information provided in the 2020 UWMP that are not superseded by the 2023 Interim Water Demand Projections herein, can be used in the development of WSAs for pending water demand projects.

1.3 What this Document Does and Does Not Address
This document only updates the following items from the 2020 UWMP as they are directly related to the change in housing unit projections:
• Retail water demand projections, specifically demands of the in-City multi-family residential sector, through 2045
• Retail water supply and demand comparisons (i.e., surpluses and shortfalls) during normal, single dry, and multiply dry years through 2045
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2023 Interim Water Demand Projections 2
This document does not update the following items from the 2020 UWMP as they are not directly related to the change in housing unit projections:
• Population projections associated with the Housing Element 2022 Update • Employment projections associated with the Housing Element 2022 Update • Retail water demands for the single family residential and non-residential sectors • Retail water loss
• Retail water savings associated with Conservation and Onsite Water Reuse programs • Suburban retail water demands
• Wholesale water demands
• Status of water supply projects

2.0 Housing Unit Projections
SF Planning provided updated housing unit projections in alignment with the Housing Element EIR in a memorandum to the SFPUC dated August 18, 2023 (Appendix A). Per SF Planning’s recommendation, it is assumed that the number of single-family detached houses will not increase from existing stock and that all future net housing growth will take the form of multi-family structures.

Table 1 compares the updated housing unit projections to those used in the 2020 UWMP in 5-year increments from 2025 to 2045. SFPUC used the updated housing unit projections as inputs to the same water demand forecasting model (i.e., econometric model) that was developed for the 2020 UWMP, described in the next section.

Table 1: Housing Unit Projections
2025 2030 2035 2040 2045
Used in 2020 UWMP 425,118 450,923 476,728 502,533 528,338 2023 Update 432,667 458,333 483,600 509,000 534,000
Net Change 7,549 7,410 6,872 6,467 5,662

3.0 Retail Water Demands
As described in the 2020 UWMP, Section 3.2, Retail Service Area, retail customers include the residents, businesses, and industries located within City limits, referred to as the in-City retail service area. Retail service is also provided to a patchwork of customers located outside the City, such as the Town of Sunol, San Francisco International Airport, Lawrence Livermore National Laboratory, and Castlewood County Service Area. These areas are not contiguous and are collectively referred to as the suburban retail service area.

The SFPUC uses econometric models to project the demands for its in-City single family residential, multi-family residential, and commercial/industrial sectors. Other in-City non-residential demands (i.e., irrigation and municipal) and suburban retail demands are estimated based on historical consumption and supplement the demands projected by the econometric models. Water loss is forecasted separately. For San Francisco Public Utilities Commission

2023 Interim Water Demand Projections 3
more information about how retail water demand projections were developed for the 2020 UWMP, refer to Section 4.1.2, Projected Retail Demands, of the 2020 UWMP.

The SFPUC, with the support of its consultant team that developed the econometric models used for the 2020 UWMP, re-ran the model specific to the multi-family residential sector using the updated housing unit projections described in the previous section. No other model inputs were changed from those that were used for the 2020 UWMP. The resulting model outputs are detailed in Appendix B and summarized in Table 2 below. Multi-family residential demands increased by about 0.5 to 0.6 mgd, or 1.5 to 2.5%, compared to those in the 2020 UWMP.

Table 2: Multi-Family Residential Water Demands (million gallons per day [mgd]) 2025 2030 2035 2040 2045
Used in 2020 UWMP 23.7 25.6 27.9 30.3 33.0
2023 Update 24.3 26.2 28.4 30.9 33.5
Difference 0.6 0.6 0.6 0.5 0.5
% Difference from 2020 UWMP 2.5% 2.3% 2.0% 1.8% 1.5%

Total retail water demand projections are shown in Table 3, which supersedes Table 4-1 of the 2020 UWMP. These projections comprise the updated multi-family residential demands from Table 2 and the unchanged demands for the remaining sectors. The demands of the remaining sectors are not updated as they are not directly related to the change in housing unit projections. Total retail demands increased by about 0.6 to 0.8% compared to those in the 2020 UWMP.

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2023 Interim Water Demand Projections 4
Table 3: Retail Water Demands (mgd)
Retail Sector or Use Type
Actuala Projectedb
2020 2025 2030 2035 2040 2045
In-City Retail
Single-Family Residential 14.5 13.7 13.5 13.4 13.5 13.5 Multi-Family Residential 22.9 24.3 26.2 28.4 30.9 33.5
Non-residential 20.9 22.9 22.9 22.8 23.1 23.6
Water Lossc 7.2 6.0 6.0 6.0 6.0 6.0
Subtotal In-City Retail Demand 65.3 66.9 68.6 70.6 73.5 76.7 Suburban Retail
Single-Family Residentiald 0.1 0.1 0.1 0.1 0.1 0.1
Non-Residential 3.1 4.0 4.0 4.0 4.0 4.0
Groveland CSDe 0.3 0.3 0.3 0.3 0.3 0.3
Water Lossc 0.0 0.0 0.0 0.0 0.0 0.0
Subtotal Suburban Retail Demand 3.5 4.4 4.4 4.4 4.4 4.4 Total Retail Demand 68.8 71.3 73.0 75.0 77.9 81.1
% Difference from 2020 UWMP N/A 0.8% 0.8% 0.8% 0.7% 0.6% a Actual consumption data are obtained from customer billing data. b Single family residential and multi-family residential demand projections are from an econometric model developed for the SFPUC. Non-residential demands include commercial/industrial demands, which are also from an econometric model, as well as municipal and irrigation demands, which are assumed to remain constant at the previous five-year average level.
c Water losses include both apparent and real losses. Suburban retail water losses are considered to be negligible. Actual water loss in 2020 is based on SFPUC’s July 2019 – June 2020 water loss audit. d Suburban retail residential demands are for single family only as no multi-family residential buildings are served.
e Groveland Community Services District (CSD) is accounted for as a retail customer for the purpose of this table and subsequent retail supply and demand comparisons in the 2020 UWMP. Demand projections were provided by Groveland CSD based on its population projections and assumed per capita water use of 107 GPCD (projections are subject to change as part of its UWMP process). In the corresponding standardized tables in UWMP 2020 Appendix B, Groveland CSD is not reported as retail, but rather wholesale.

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2023 Interim Water Demand Projections 5

4.0 Water Supply and Demand Comparisons
This section compares the SFPUC’s retail water supplies (unchanged from the 2020 UWMP) and demands (updated in Table 3) through 2045 during normal, single dry, and multiple dry years. The supply and demand comparisons are presented for two Regional Water System (RWS) supply scenarios: (1) with full implementation of the Bay-Delta Plan Amendment and (2) without implementation of the Bay- Delta Plan Amendment. For more information about these scenarios and how their corresponding supplies were estimated, refer to Section 8, Water Supply Reliability Assessment, of the 2020 UWMP1.

4.1 With Bay-Delta Plan Amendment
The instream flow requirements of the Bay-Delta Plan Amendment would impact the RWS supplies in single dry years and multiple dry years. The comparison of retail demands and supplies under the Bay- Delta Plan Amendment is presented in Table 4, which supersedes Table 8-4 of the 2020 UWMP and demonstrates the following:
• Normal Years: During normal hydrologic years, the SFPUC will have adequate supplies to meet its projected retail water demands. This is unchanged from the 2020 UWMP. • Single Dry Year: During single dry years, there would be an anticipated 30 to 40% shortage of RWS supplies. When the supplies available to retail customers (RWS plus local supplies) are compared to the projected retail demands, a retail supply shortfall of 15% to 26% (11 to 21 mgd) is expected in single dry year conditions. These shortfalls are less than 1%, or 1 mgd, higher than estimated in the 2020 UWMP.
• Multiple Dry Years: If a multiple dry year event occurs, there would be anticipated shortages in RWS supplies of 30 to 49%, depending on demand levels. When the supplies available to retail customers (RWS plus local supplies) are compared to the projected retail demands, there is an anticipated shortfall of almost 36%, or 29 mgd, by the fifth dry year at 2045 projected levels of demand. This shortfall is less than 1%, or 1 mgd, higher than estimated in the 2020 UWMP.

4.2 Without Bay-Delta Plan Amendment
Without implementation of the Bay-Delta Plan Amendment, existing and planned supplies would meet all projected RWS demands in all years except deep into a multi-year drought at 2045 projected levels of demand. The comparison of retail demands and supplies is presented in Table 5, which supersedes Table 8-6 of the 2020 UWMP and demonstrates the following:
• Normal Years: During normal hydrologic years, the SFPUC will have adequate supplies to meet its projected retail water demands. This is unchanged from the 2020 UWMP. • Single Dry Year: During single dry years, there are no anticipated shortages of RWS supplies.

This is unchanged from the 2020 UWMP.
• Multiple Dry Years: In the multiple dry year scenario, the SFPUC would only experience system- wide shortages in RWS supplies of 10% during years 4 and 5 of an extended drought at 2045

1 Section 7.3.1, page 7-5, of the 2020 UWMP states, “Although the [State Water Resources Control Board] has stated it intends to implement the Bay-Delta Plan Amendment on the Tuolumne River by the year 2022, given the current level of uncertainty, it is assumed for the purposes of this draft UWMP that the Bay-Delta Plan Amendment will be fully implemented starting in 2023.” To date, the Bay-Delta Plan Amendment has not been implemented and the SFPUC currently does not have an anticipated date for implementation.

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2023 Interim Water Demand Projections 6
levels of demand. In a 10% shortage, retail customers would reduce their demands by 5% as required by the Water Supply Agreement between SFPUC and its Wholesale Customers. As a result of this demand reduction, there is a projected surplus of 5.3%, or 4.1 mgd, which is 0.1 mgd greater than that estimated in the 2020 UWMP.

Table 4: Retail Supply and Demand Comparison for Projected Normal & Dry Year Scenarios With Bay-Delta Plan Amendment (mgd)

Normal
Year
Single
Dry
Yeara
Multiple Dry Yearsb
Year 1 Year 2 Year 3 Year 4 Year 5
2025
Total Retail Demand 71.3 71.3 71.3 71.3 71.3 71.3 71.3
Baseline Retail Demandc 71.3 71.3 71.3 71.3 71.3 71.3 71.3 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 70.7 59.5 59.5 51.5 51.5 51.5 51.5
Retail Groundwatere 1.4 1.4 1.4 1.4 1.4 1.4 1.4
Retail Recycled Waterf 2.1 2.1 2.1 2.1 2.1 2.1 2.1
RWS Supply Utilized by Retailg 67.2 56.0 56.0 48.0 48.0 48.0 48.0 Difference (Supply Surplus or Shortfall) 0.0 -11.8 -11.8 -19.8 -19.8 -19.8 -19.8 Difference as Percentage of Demand 0.0% -16.5% -16.5% -27.8% -27.8% -27.8% -27.8% 2030
Total Retail Demand 73.0 73.0 73.0 73.0 73.0 73.0 73.0
Baseline Retail Demandc 73.0 73.0 73.0 73.0 73.0 73.0 73.0 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 72.4 61.4 61.4 53.4 53.4 53.4 53.4
Retail Groundwatere 2.4 2.4 2.4 2.4 2.4 2.4 2.4
Retail Recycled Waterf 2.5 2.5 2.5 2.5 2.5 2.5 2.5
RWS Supply Utilized by Retailg 67.5 56.5 56.5 48.5 48.5 48.5 48.5 Difference (Supply Surplus or Shortfall) 0.0 -11.6 -11.6 -19.6 -19.6 -19.6 -19.6 Difference as Percentage of Demand 0.0% -15.9% -15.9% -26.8% -26.8% -26.8% -26.8% 2035
Total Retail Demand 75.0 75.0 75.0 75.0 75.0 75.0 75.0
Baseline Retail Demandc 75.0 75.0 75.0 75.0 75.0 75.0 75.0 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 74.5 63.8 63.8 55.5 55.5 55.5 51.4
Retail Groundwatere 3.4 3.4 3.4 3.4 3.4 3.4 3.4
Retail Recycled Waterf 2.5 2.5 2.5 2.5 2.5 2.5 2.5
RWS Supply Utilized by Retailg 68.6 57.9 57.9 49.6 49.6 49.6 45.5 Difference (Supply Surplus or Shortfall) 0.0 -11.2 -11.2 -19.5 -19.5 -19.5 -23.6 Difference as Percentage of Demand 0.0% -14.9% -14.9% -26.0% -26.0% -26.0% -31.5%

San Francisco Public Utilities Commission

2023 Interim Water Demand Projections 7

Normal
Year
Single
Dry
Yeara
Multiple Dry Yearsb
Year 1 Year 2 Year 3 Year 4 Year 5
2040
Total Retail Demand 77.9 77.9 77.9 77.9 77.9 77.9 77.9
Baseline Retail Demandc 77.9 77.9 77.9 77.9 77.9 77.9 77.9 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 77.4 66.4 66.4 57.9 57.9 52.0 52.0
Retail Groundwatere 4.4 4.4 4.4 4.4 4.4 4.4 4.4
Retail Recycled Waterf 2.5 2.5 2.5 2.5 2.5 2.5 2.5
RWS Supply Utilized by Retailg 70.5 59.5 59.5 51.0 51.0 45.1 45.1 Difference (Supply Surplus or Shortfall) 0.0 -11.5 -11.5 -20.0 -20.0 -25.9 -25.9 Difference as Percentage of Demand 0.0% -14.8% -14.8% -25.7% -25.7% -33.2% -33.2% 2045
Total Retail Demand 81.1 81.1 81.1 81.1 81.1 81.1 81.1
Baseline Retail Demandc 81.1 81.1 81.1 81.1 81.1 81.1 81.1 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 80.6 60.1 60.1 60.1 60.1 52.1 52.1
Retail Groundwatere 4.4 4.4 4.4 4.4 4.4 4.4 4.4
Retail Recycled Waterf 2.5 2.5 2.5 2.5 2.5 2.5 2.5
RWS Supply Utilized by Retailg 73.7 53.2 53.2 53.2 53.2 45.2 45.2 Difference (Supply Surplus or Shortfall) 0.0 -21.0 -21.0 -21.0 -21.0 -29.0 -29.0 Difference as Percentage of Demand 0.0% -25.9% -25.9% -25.9% -25.9% -35.8% -35.8% Normal, single dry, and multiple dry year conditions are on a water year basis. a During a single dry year, system-wide shortages of 30 – 40% are in effect (see Table 8-3 of the 2020 UWMP). For this analysis, shortages greater than 20% are considered to have the same retail/wholesale allocation as the maximum Stage 4, 16-20% system-wide shortage in the Water Shortage Allocation Plan (WSAP). b During multiple dry years, system-wide shortages of 30 – 55% are in effect (see Table 8-3 of the 2020 UWMP). For this analysis, shortages greater than 20% are considered to have the same retail/wholesale allocation as the maximum Stage 4, 16-20% system-wide shortage in the WSAP.
c Total retail demands correspond to those in Table 3 and reflect passive and active conservation, onsite water reuse savings, and water loss. Demands for Groveland Community Services District is included in the table above. d As amended in 2018, the WSAP Tier One Allocation Plan requires retail customers to conserve a minimum of 5% during droughts. If, during a declared water shortage, retail demands on the Regional Water System (RWS) are lower than the retail allocation in a dry year, retail demands on the RWS will be reduced by 5%. An N/A on this row means that either this 5% rationing requirement doesn't apply (i.e. no declared water shortage), or retail customers are already rationing greater than 5%.
e Groundwater supplies are assumed to be equivalent to projected demands for the San Francisco Groundwater Supply Project (ramping up to 4 mgd by 2040) and Castlewood County Service Area (0.4 mgd). Groundwater availability would not be affected by dry year conditions.
f Recycled water supplies are assumed to be equivalent to projected demands related to the Westside Recycled Water Project (1.6 mgd by 2021 and 1.8 mgd by 2030), Harding Park and Fleming Golf Courses (0.23 mgd), and Sharp Park Golf Course (up to 0.1 mgd) and Treasure Island (0.2 mgd by 2025 and 0.4 mgd by 2030). Recycled water availability would not be affected by dry year conditions.
g Procedures for RWS allocations and the WSAP are described in Section 8.3 of the 2020 UWMP. Groundwater and recycled water are assumed to be used before RWS supplies to meet retail demand. However, in normal years, if groundwater and recycled water supplies are not available, up to 81 mgd of RWS supply could be used.

San Francisco Public Utilities Commission

2023 Interim Water Demand Projections 8

Table 5: Retail Supply and Demand Comparison for Projected Normal & Dry Year Scenarios Without Bay-Delta Plan Amendment (mgd)

Normal
Year
Single
Dry
Yeara
Multiple Dry Yearsb
Year 1 Year 2 Year 3 Year 4 Year 5
2025
Total Retail Demand 71.3 71.3 71.3 71.3 71.3 71.3 71.3
Baseline Retail Demandc 71.3 71.3 71.3 71.3 71.3 71.3 71.3 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 71.3 71.3 71.3 71.3 71.3 71.3 71.3
Retail Groundwatere 1.4 1.4 1.4 1.4 1.4 1.4 1.4
Retail Recycled Waterf 2.1 2.1 2.1 2.1 2.1 2.1 2.1
RWS Supply Utilized by Retailg 67.8 67.8 67.8 67.8 67.8 67.8 67.8 Difference (Supply Surplus or Shortfall) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Difference as Percentage of Demand 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 2030
Total Retail Demand 73.0 73.0 73.0 73.0 73.0 73.0 73.0
Baseline Retail Demandc 73.0 73.0 73.0 73.0 73.0 73.0 73.0 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 73.0 73.0 73.0 73.0 73.0 73.0 73.0
Retail Groundwatere 2.4 2.4 2.4 2.4 2.4 2.4 2.4
Retail Recycled Waterf 2.5 2.5 2.5 2.5 2.5 2.5 2.5
RWS Supply Utilized by Retailg 68.1 68.1 68.1 68.1 68.1 68.1 68.1 Difference (Supply Surplus or Shortfall) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Difference as Percentage of Demand 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 2035
Total Retail Demand 75.0 75.0 75.0 75.0 75.0 75.0 75.0
Baseline Retail Demandc 75.0 75.0 75.0 75.0 75.0 75.0 75.0 5% Retail Demand Reductiond N/A N/A N/A N/A N/A N/A N/A Total Retail Supply 75.0 75.0 75.0 75.0 75.0 75.0 75.0
Retail Groundwatere 3.4 3.4 3.4 3.4 3.4 3.4 3.4
Retail Recycled Waterf 2.5 2.5 2.5 2.5 2.5 2.5 2.5
RWS Supply Utilized by Retailg 69.1 69.1 69.1 69.1 69.1 69.1 69.1 Difference (Supply Surplus or Shortfall) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Difference as Percentage of Demand 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%

San Francisco Public Utilities Commission

2023 Interim Water Demand Projections 9

During those years, a 10% system-wide shortage is in effect. c Total retail demands correspond to those in Table 3 and reflect passive and active conservation, onsite water reuse savings, and water loss. Demands for Groveland Community Services District is included in the table above. d As amended in 2018, the Water Shortage Allocation Plan (WSAP) Tier One Allocation Plan requires retail customers to conserve a minimum of 5% during droughts. If, during a declared water shortage, retail demands on the Regional Water System (RWS) are lower than the retail allocation in a dry year, retail demands on the RWS will be reduced by 5%. An N/A on this row means that either this 5% rationing requirement doesn't apply (i.e. no declared water shortage), or retail customers are already rationing greater than 5%.
e Groundwater supplies are assumed to be equivalent to projected demands for the San Francisco Groundwater Supply Project (ramping up to 4 mgd by 2040) and Castlewood County Service Area (0.4 mgd). Groundwater availability would not be affected by dry year conditions.
f Recycled water supplies are assumed to be equivalent to projected demands related to the Westside Recycled Water Project (1.6 mgd by 2021 and 1.8 mgd by 2030), Harding Park and Fleming Golf Courses (0.23 mgd), and Sharp Park Golf Course (up to 0.1 mgd) and Treasure Island (0.2 mgd by 2025 and 0.4 mgd by 2030). Recycled water availability would not be affected by dry year conditions.
g Procedures for RWS allocations and the WSAP are described in Section 8.3 of the 2020 UWMP. Groundwater and recycled water are assumed to be used before RWS supplies to meet retail demand. However, in normal years, if groundwater and recycled water supplies are not available, up to 81 mgd of RWS supply could be used.

S an Francisco Public Utilities Commission
2023 Interim Water Demand Projections
Appendix A – San Francisco Planning Memorandum

August 18, 2023

Paula Kehoe
Director of Water Resources, SFPUC
525 Golden Gate Street, 10th Floor
San Francisco, CA 94102

Re: Projections of growth for San Francisco through 2050

Dear Paula:

On October 27, 2020, the Planning Department provided SFPUC household and job growth projections to inform the citywide water demand projections in the 2020 update of the SFPUC’s Urban Water Management Plan (UWMP). The SFPUC adopted the 2020 UWMP in June 2021. Since that time, the Planning Commission certified the Housing Element 2022 Update Environmental Impact Report (Housing Element EIR or EIR) in November 2022. The EIR, which supported the City’s adoption of the Housing Element in January 2023, assumed slightly higher household projections than those used in the UWMP . As you requested, this memo provides the EIR’s household projections1 to inform a minor update to SFPUC’s water demand projections.

Citywide Growth Projections

Table 1 shows the Planning Department’s housing projections for the years 2020-2050. We recognize that the 2020 UWMP water planning horizon extends only to 2045.

Table 1: Development Projections
2020 2025 2030 2035 2040 2045 2050
Housing Units 407,000 432,667 458,333 483,600 509,000 534,000 559,000

The Housing Element update is required to be adopted every eight years by state law and was approved by the Board of Supervisors in January 2023 and certified by the state Department of Housing and Community Development on February 1, 2023. One of the primary goals of the Housing Element 2022 Update is to improve housing affordability by increasing the rate of housing production compared with the past several decades. The projections are based on the Housing Element objective of producing an average of approximately 5,000

1 The Housing Element EIR assumed slightly less job growth than that assumed in the Planning Department’s October 27, 2020 memo used to inform the 2020 UWMP water demand projections (i.e., EIR assumed 869,000 jobs in 2045 whereas October 2020 memo assumed 894,255 jobs). Given that the 2020 UWMP water demand projections used more conservative (i.e., slightly higher) job growth assumptions, there is no need to update the water demand projections to account for the Housing Element EIR job growth assumptions.

2 housing units per year, with adjustments for certain large development plans. These projections were analyzed in the Housing Element EIR. (The projections can be found in Appendix C of the EIR.) The Housing Element EIR considered two projection years – 2035 and 2050. For the purposes of generating the 5-year incremental projections required by the SFPUC through 2045, the Planning Department assumes a constant, straight-line average pace of housing production for the periods of 2020-2035 and 2035-2050.

Regarding the typology of projected new housing stock, our memo provided to SFPUC dated October 27, 2020, to inform preparation of the 2020 UWMP , contained analysis supporting a Planning Department recommendation that the SFPUC assume for the purposes of modelling citywide projected housing development in San Francisco that the number of single-family detached houses will not increase from existing stock and that all future net housing growth will take the form of multi-family structures. This recommendation is unchanged.

Sincerely,

Joshua Switzky
Acting Director of Citywide Planning

cc:

Fan Lau, SFPUC
Lisa Gibson, Planning
Wade Wietgrefe, Planning
Debra Dwyer, Planning
Julie Moore, Planning
Scott Edmondson, Planning
Peter Miljanich, City Attorney
Andrea Ruiz-Esquide, City Attorney

San Francisco Public Utilities Commission

2023 Interim Water Demand Projections

Appendix B – Woodard & Curran Memorandum

SFPUC 1 Woodard & Curran, Inc.

SFPUC Demand Forecast Model Re-Run with Updated Housing Unit Forecast August 25, 2023

TECHNICAL MEMORANDUM
TO: Paula Kehoe, Director of Water Resources, San Francisco Public Utilities Commission Fan Lau, Water Resources Division, San Francisco Public Utilities Commission PREPARED BY: Chris Hewes, Woodard & Curran
REVIEWED BY: Katie Cole, Woodard & Curran
DATE: August 25, 2023
RE: SFPUC Demand Forecast Model Re-Run with Updated Housing Unit Forecast

In 2020, the San Francisco Public Utilities Commission ( SFPUC) engaged The Brattle Group to develop an econometric-based water demand forecast model (Model) to generate retail water demands for the SFPUC’s 2020 Urban Water Management Plan (UWMP). A key input to the Model was household development forecasts provided b y the San Francisco Planning Department (October 27, 2020 memo from Joshua Switzky, Land Use & Community Planning Program Manager) . At the time, these forecasts were in draft form, developed during preparation of the city’s General Plan Housing Element (Ho using Element 2022 Update). Since June 2021 when the 2020 UWMP was published, the Planning Commission certified the Housing Element 2022 Update Environmental Impact Report (EIR) in November 2022. The EIR, which supported the City’s adoption of the Housing Element in January 2023, assumed slightly higher household forecasts than those used in the UWMP.

Woodard & Curran worked with the Model developers to re-run it with the updated housing development forecasts provided by the San Francisco Planning Department (see Section 1 – Updated Model Inputs). The resulting Model outputs (water demands) were combined with other values external to the Model that together provide full retail water demand for SFPUC (see Section 2 – Updated Results).

1. UPDATED MODEL INPUTS
See Table 1 for the updated housing development forecast provided by the San Francisco Planning Department ( August 18, 2023 memo from Joshua Switzky, Acting Director of Citywide Planning ). Per SFPUC's guidance in the previous Model effort, and re-confirmed by the San Francisco Planning Department for the current Model effort, it was assumed that there will not be an increase in the number of single-family detached houses from the existing stock. Therefore, the water demand forecast for the single-family sector is the same as the prior outputs. All future housing growth is expected to occur in the multi-family residential sector. No other inputs to the Model were changed (e.g., employment forecast, econometric variables, etc.).

Table 1: Housing Development Forecast
Housing Units 2020 2025 2030 2035 2040 2045
For 2020 UWMP 399,313 425,118 450,923 476,728 502,533 528,338 For 2023 Update 407,000 432,667 458,333 483,600 509,000 534,000

SFPUC 2 Woodard & Curran, Inc.

SFPUC Demand Forecast Model Re-Run with Updated Housing Unit Forecast August 25, 2023

2. UPDATED RESULTS
See Table 2 for the updated outputs directly from the Model. Table 3 shows the updated multi -family residential sector forecast details. Tables 2 and 3 contain rows that specify the water savings associated with the Onsite Water Reuse Program. These savings were esti mated for the 2020 UWMP but are not updated for this memo as (1) they are estimated separately from the Model and (2) the types of new multi -family residential projects and their participation in the Onsite Water Reuse Program are currently unknown.

See Table 4 for a comparison of the previous and updated multi-family residential sector forecasts.

See Table 5 for the updated retail demand forecast, which incorporates additional information that is external to the Model, as it was presented in the 2020 UWMP (e.g., municipal and irrigation demands in the “non-residential” sector, as well as Suburban Retail demands).

SFPUC 3 Woodard & Curran, Inc.

SFPUC Demand Forecast Model Re-Run with Updated Housing Unit Forecast August 25, 2023 Table 2: Model Outputs (mgd)

Notes:

FY2019-20: This column is a forecast that assumes no COVID -19 pandemic and average weather conditions. Actual demand for FY2019-20 is shown in Table 5 of this memo.

Unadjusted Baseline Demand: This is the raw output of the statistical forecast model.

Conservation Adjustments: These estimates are the output of the SFPUC Conservation model and have not been updated in this memo.

Multifamily Residential Fire Accounts: These values were supplied by SFPUC and have not been updated in this memo.

Commercial and Industrial: These forecasts are unchanged from the previous forecasts.

Grand Total: This row does not include water losses, suburban accounts, irrigation accounts , or municipal accounts.

The volumes from these additional sector types are included in Table 5 of this memo and are unchanged from the previous forecasts.

SFPUC 4 Woodard & Curran, Inc.

SFPUC Demand Forecast Model Re-Run with Updated Housing Unit Forecast August 25, 2023 Table 3: Multi-Family Demand Forecast Details

Notes:

FY2019-20: This column is a forecast that assumes no COVID -19 pandemic and average weather conditions. Actual demand for FY2019-20 is shown in Table 5 of this memo.

Unadjusted Baseline Demand: This is the raw output of the statistical forecast model.

Conservation Adjustments: These estimates are the output of the SFPUC Conservation model and have not been updated in this memo.

Table 4: Multi-Family Residential Water Demand Forecast (mgd) Multi-Family Residential Actuala Projectedb
2020 2025 2030 2035 2040 2045
From 2020 UWMP 22.9 23.7 25.6 27.9 30.3 33.0
From 2023 Update (from Table 3) 22.9 24.3 26.2 28.4 30.9 33.5 Difference 0.0 0.6 0.6 0.6 0.5 0.5
a Actual consumption data are obtained from customer billing data. b Multi-family residential demand projections are from an econometric model developed for the SFPUC.

SFPUC 5 Woodard & Curran, Inc.

SFPUC Demand Forecast Model Re-Run with Updated Housing Unit Forecast August 25, 2023 Table 5: Retail Water Demand Forecast (mgd)
Retail Sector or Use Type Actuala Projectedb
2020 2025 2030 2035 2040 2045
In-City Retail
Single-Family Residential 14.5 13.7 13.5 13.4 13.5 13.5 Multi-Family Residential 22.9 24.3 26.2 28.4 30.9 33.5
Non-residential 20.9 22.9 22.9 22.8 23.1 23.6
Water Lossc 7.2 6.0 6.0 6.0 6.0 6.0
Subtotal In-City Retail Demand 65.3 66.9 68.6 70.6 73.5 76.7 Suburban Retail
Single-Family Residentiald 0.1 0.1 0.1 0.1 0.1 0.1
Non-Residential 3.1 4.0 4.0 4.0 4.0 4.0
Groveland CSDe 0.3 0.3 0.3 0.3 0.3 0.3
Water Lossc 0.0 0.0 0.0 0.0 0.0 0.0
Subtotal Suburban Retail Demand 3.5 4.4 4.4 4.4 4.4 4.4 Total Retail Demand 68.8 71.3 73.0 75.0 77.9 81.1
a Actual consumption data are obtained from customer billing data. b Single family residential and multi-family residential demand projections are from an econometric model developed for the SFPUC. Non-residential demands include commercial/industrial demands, which are also from an econometric model, as well as municipal and irrigation demands, which are assumed to remain constant at the previous five -year average level.
c Water losses include both apparent and real losses. Suburban retail water losses ar e considered to be negligible.

Actual water loss in 2020 is based on SFPUC’s July 2019 – June 2020 water loss audit. d Suburban retail residential demands are for single family only as no multi-family residential buildings are served. e Groveland Community Services District (CSD) is accounted for as a retail customer for the purpose of this table and subsequent retail supply and demand comparisons in the 2020 UWMP. Demand projections were provided by Groveland CSD based on its population projections and assumed per capita water use of 107 GPCD (projections are subject to change as part of its UWMP process). In the corresponding standardized tables in UWMP 2020 Appendix B, Groveland CSD is not reported as retail, but rather wholesale.

Attachment B –
Freedom West 2.0 Project Demand Memo

May 8, 2025
To: Jennifer Lee, Water Resources Division, San Francisco Public Utilities Commission From: Megan Calpin, Environmental Planning Division, San Francisco Planning Re: 710 McAllister Street / Freedom West Homes 2.0
Planning Department File No. 2020-006887ENV
The purpose of this memorandum is to request that the San Francisco Public Utilities Commission (SFPUC) prepare a Water Supply Assessment (WSA) for the proposed project at 710 McAllister Street, in compliance with CEQA Guidelines Section 15155 and Sections 10910 through 10915 of the California Water Code.

The project sponsor (MacFarlane Partners) propose to redevelop the approximately 10.37-acre site in the Western Addition neighborhood in San Francisco, within the Market & Octavia Area Plan boundaries. The project site is comprised of four parcels, currently developed with 20 two- to three-story residential buildings that contain 358 cooperative (co-op) housing units and two multi-purpose buildings, open space and surface parking lots. The project would demolish all existing uses on the project site and construct approximately 2,614,700 gross square feet of residential floor area with 2,291 total residential dwelling units distributed throughout the project site; approximately 108,000 gross square feet of hotel floor area with 150 rooms; approximately 68,600 gross square feet of commercial uses; approximately 14,800 gross square feet of cultural, institutional, educational (CIE) uses; and approximately 867,000 gross square feet of parking in the form of 1,640 off-street parking spaces and 14 off-street loading spaces. Project construction would occur in three phases, with subphases, beginning approximately early 2027 and finishing in mid-2034.

The project sponsor provided project information intended to meet the requirements outlined in the SFPUC guidance memo dated July 31, 2024. A summary of the project description, average daily water demands, and supporting tables prepared by the project sponsor’s consultant (based on the SFPUC Non-Potable Water Calculator(s) Version 9.3), are attached. Should you have questions or need additional information from the Planning Department or the project sponsor, please contact me at 628.652.7508 or [email protected].

Sincerely,
Megan Calpin
Senior Environmental Planner
San Francisco Planning Department

BKF ENGINEERS
255 Shoreline Drive, Suite 200, Redwood City, CA 94065 | 650.482.6300 Memo
Date: June 06, 2025
To: San Francisco Planning Department
From: BKF Engineers
Subject: Freedom West Homes, Water Supply Assessment
This memorandum presents the project description and project information regarding water demand for the San Francisco Public Utilities Commission (SFPUC) to prepare a Water Supply Assessment (WSA) for the Freedom West Homes project.

This memorandum is expected to be attached to the WSA as an appendix and referenced in the WSA as needed. Table 1 provides the basic information of the proposed project.

1. Introduction
The project consists of the redevelopment of approximately 10.4 acres in the Fillmore Western Addition. The Project site includes two blocks and is bounded by Golden Gate Avenue to the north, Gough Street to the east, Fulton Street to the south, and Laguna Street to the west.

Bethel African Methodist Episcopal (AME) Church located at the corner of Laguna Street and Golden Gate Avenue, and 880 McAllister are not part of the Project.

The site is currently developed with 358 units of affordable cooperative housing and surface parking spaces owned by the Freedom West Homes Corporation. The Project includes the replacement of the existing cooperative housing units. It will also build new residential, commercial, hotel, parking, and community facilities, including a Science, Technology, Engineering and Math (STEM) workforce training center. The Project will create public and private common spaces, including public access to a previously vacated portion of Octavia Street.

Overall, the Project will include 2,876,100 gross square feet (gsf) of above ground building area consisting of: 2,614,700 gsf of residential space, 108,000 gsf of hotel space, 68,600 gsf of commercial space, 14,800 gsf of Cultural, Institutional, and Educational (CIE) space, and 63,000 gsf of podium parking. The total number of housing units is 2,291 comprising of 267 co- op housing units, 133 affordable housing units, and 1,891 market-rate units. The hotel includes a total of 150 rooms. The Project will provide approximately 56,050 gsf of public space including 49,500 gsf public access to two blocks of Octavia Street (proposed as “Octavia Green”), between Fulton St. and Golden Gate Ave, and approximately 84,475 gsf of common space for residents.

June 6, 2025

Page 2 of 7 ends

Table 1: Project Information
Project Name Freedom West Homes
Project Contact MacFarlane Partners, LLC
Project Address(es)
710 McAllister Street;
889 McAllister Street;
735 Gough Street; and
550 Fulton Street.

Assessor’s Parcel Number(s)
0770027
0783023
0783024
0783025
Estimated Project Completion Date (if
project construction and/or occupancy
would be phased, provide completion or
occupancy date of each phase)
Phase 1: June 2030
Phase 2: October 2033
Phase 3: June 2034
Proposed Land Use(s)
Residential
Commercial
Cultural, Institutional, and Educational (CIE)
Podium Parking
Hotel
Open Space
Total Building Size* – Residential,
Commercial, CIE, Podium Parking, and
Hotel (gross square feet)
Phase 1: 1,125,600
Phase 2: 768,500
Phase 3: 982,000
Total: 2,876,100
Total Lot Size (square feet)
Building Lot Area: 402,000
Open Space Lot Area: 49,500
Total Lot Area: 451,500
Days in Operation Per Year 365
Site Permit Application No. (if applicable) N/A
*See Table 2 for Individual Building Sizes
June 6, 2025

Page 3 of 7 ends

Table 2: Building Information
Building ID Residential
Area
Commercial
Area
CIE
Area
Hotel
Area
Podium
Parking
Area
Total
Housing
Units
Percent
Affordable
Housing
Percent
CO-OP
Housing
Phase 1
NW-CO-OP 362,800 7,800 11,400 - - 267 - 100%
NE-A 188,800 7,200 3,400 - - 133 100% -
NE-B 168,400 4,300 - - - 176 - -
NE-C 135,000 - - - - 135 - -
NE-D 225,700 3,800 - - - 224 - -
Phase 1 Total 1,080,700 23,100 14,800 - - 935 14% 29%
Phase 2
SW-A 178,000 - - 9,300 166 - -
SW-B 91,000 4,100 - - 7,600 74 - -
SW-C 83,800 2,600 - - 8,700 72 - -
SW-D 87,200 600 - - 9,300 74 - -
SW-E 102,000 5,300 - - - 81 - -
SW-F 171,000 8,000 - - - 140 - -
Phase 2 Total 713,000 20,600 - - 34,900 607 0% 0%
Phase 3
SE-A 381,400 7,400 - - - 311 - -
SE-B 157,600 7,300 - - 16,600 151 - -
SE-C 2,000 - 108,000 - - - -
SE-D 282,000 8,200 - - 11,500 287 - -
Phase 3 Total 821,000 24,900 - 108,000 28,100 749 0% 0% Total 2,614,700 68,600 14,800 108,000 63,000 2,291 6% 12% June 6, 2025

Page 4 of 7 ends

WSA Applicability
☐ Residential development Number of dwelling units: . ☐ Shopping center or business
establishment
Number of employees: .

Square footage of floor space: .
☐ Hotel and/or motel Number of rooms: . ☐ Industrial, manufacturing,
processing plant, or industrial park
Number of persons to be housed: .

Acreage of land to be occupied: .

Square footage of floor space: .
☒ Mixed-use development
Number of dwelling units: 2,291
Number of employees: TBD
Square footage of floor space: 2,876,100
Number of hotel and/or motel rooms: 150
Acreage of land to be occupied: 9.2
☐ None of the above categories
Would the project use an average of 50,000 gallons per
day or 18.25 million gallons per year?
☐ Yes or ☒ No

2. Existing Water Demand
The Existing Project Water Demand is based on the average 5-year water consumption billing information provided by the San Francisco Public Utilities Commission (SFPUC). See Table 3 for existing demand for each project phase. The existing water demands for the existing site include uses within the existing buildings and site irrigation.

3. Proposed Project Water Demand
The Proposed Project Water Demand is based on the proposed building gross square footage, proposed site areas, and the use of the San Francisco Public Utilities Commission (SFPUC) Non-Potable Water Calculator. See Tables 3 and 4 and the attached Non-Potable Water Calculators for each construction phase. The total water demand is shown for each phase of the project in Table 3 and shown over a 15 year period in Table 4. Project Phase 1 will redevelop Block 0770, followed by Project Phase 2 which will redevelop half of Block 0783, and project Phase 3 which will redevelop the remainder of Block 0783. See Project Phasing Figure

1. As shown in Tables 3 and 4 below, the total water demand for project full build-out (Phase 1 + Phase 2 + Phase 3 with completion of the project in 2033) is approximately 170,000 gallons per day (gpd), or 60.3 million gallons per year (gpy). Of the total water demand, 19.3 million gpy or 29 % is expected to be met by non-potable water supply.

June 6, 2025

Page 5 of 7 ends

Table 3: Net Water Demand Based on Project Phasing
Demand of Proposed Project Phase 1 Phase 1 + Phase 2 Phase 1 + Phase 2 + Phase 3
Potable Demand (mgd) 0.04 0.07 0.12
Non-potable Demand (mgd) 0.02 0.03 0.05
Total Demand (mgd)a 0.06 0.10 0.17
Potential Potable Water
Savings as Percentage of Total
Demand
33% 30% 29%
Existing Phase Area Demand
(mgd)b 0.02 0.03 0.05
Net New Water Demand (mgd) 0.04 0.07 0.12
*mgd = million gallons per day
a. Total demand conservatively assumes that all demands are met with potable supplies. b. Existing water demand information is based on the 5-year water consumption billing information provided by SFPUC. Existing demands are subtracted from total projected water demands to show the incremental increase in demands associated with the project (i.e., the net increase in water demand).

Table 4: Net Yearly Water Demand
Demand of Proposed Project 2025 2030 2035 2040 2045
Potable Demand (mgd) 0.00 0.04 0.12 0.12 0.12
Non-potable Demand (mgd) 0.00 0.02 0.05 0.05 0.05
Total Demand (mgd)a 0.00 0.06 0.17 0.17 0.17
Potential Potable Water
Savings as Percentage of Total
Demand
0% 33% 29% 29% 29%
Existing Phase Area Demand
(mgd)b 0.05 0.05 0.05 0.05 0.05
Net New Water Demand (mgd) 0.00 0.01 0.12 0.12 0.12
*mgd = million gallons per day
a. Total demand conservatively assumes that all demands are met with potable supplies. b. Existing site demands were averaged over the most recent five-year period. Existing demands are subtracted from total projected water demands to show the incremental increase in demands associated with the project (i.e., the net increase in water demand).

June 6, 2025

Page 6 of 7 ends

4. Compliance with City and County of San Francisco Ordinances Water Efficient Irrigation Ordinance1
The project will comply with this ordinance and design the new landscaping and irrigation systems to comply with the requirements of a Tier 2 project (new landscape area of at least 500 sf).

Residential Water Conservation Ordinance2
This ordinance requires residential properties sold after 2009, or are in the process of selling or performing major interior improvements to fix all leaks in the plumbing system and replace inefficient fixtures with efficient fixtures. Since the project will demolish all existing buildings, this ordinance is not applicable.

Commercial Water Conservation Ordinance3
This ordinance requires commercial buildings to replace non-compliant toilets, urinals, showerheads and faucets. Since the project will demolish all existing buildings, this ordinance is not applicable.

Recycled Water Use Ordinance4
The project is located outside of a designated recycled water use area. Therefore, this ordinance is not applicable.

Non-potable Water Ordinance5
This ordinance requires new development projects that apply for a site permit after January 1, 2022 of 100,000 gross square feet or more to install and operate an onsite water reuse system.

The project will comply with this ordinance, except where the ordinance is not applicable (i.e. 100% affordable housing, 100% permanent supportive housing or a housing project funded or constructed pursuant to the HOPE SF Program). The project will consider rainwater capture and reuse for site irrigation, and greywater capture and reuse for indoor non-potable purposes such as toilet flushing. The project will likely assess non-potable supply on a building-scale system. 1 https://www.sfpuc.gov/construction-contracts/design-guidelines-standards/water-efficient-landscape 2 https://www.sfpuc.gov/construction-contracts/design-guidelines-standards/residential-water-conservation 3 https://www.sfpuc.gov/construction-contracts/design-guidelines-standards/commercial-water-conservation 4 https://www.sfpuc.gov/construction-contracts/design-guidelines-standards/recycled-water-use 5 https://www.sfpuc.gov/construction-contracts/design-guidelines-standards/onsite-water-reuse June 6, 2025

Page 7 of 7 ends

Attachments

1. Phase 1A Summary Sheet from the Non-Potable Water Use Calculator

2. Phase 1B Summary Sheet from the Non-Potable Water Use Calculator

3. Phase 1C Summary Sheet from the Non-Potable Water Use Calculator

4. Phase 2A Summary Sheet from the Non-Potable Water Use Calculator

5. Phase 2B Summary Sheet from the Non-Potable Water Use Calculator

6. Phase 3A Summary Sheet from the Non-Potable Water Use Calculator

7. Phase 3B Summary Sheet from the Non-Potable Water Use Calculator

8. Project Program Figure 1

9. Project Phasing Figure 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 1A
Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 382,000 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 2,263,772 33% of total Total Annual Water Demand (gallons/year): 6,773,500
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 113,063 113,314

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: NW CO-OP Freedom West Homes 2.0 Phase 1A Project Address: 889 McAllister Street
735 Gough Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2029 -
Building Type: Mixres MIPS MIPS -
Total Building Size (GSF): 382,000 0 0 382,000
Total Lot Size (ft2): 67,699 0 0 67,699
Number of Residential Units: 267 0 0 267
Impervious Surface Above Grade (ft2): 53,349 0 0 53,349 Impervious Surface Below Grade (ft2): 29,310 0 0 29,310 Irrigated Landscaped Area (ft2): 9,760 0 0 9,760

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 0 0 0
Blackwater: 3,539,029 0 0 3,539,029 (includes GW)
Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 3,539,029 0 0 3,539,029
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 1,300,695 0 0 1,300,695
Drain Trap Priming: 0 0 0 0
Irrigation: 79,246 0 0 79,246
Clothes Washing: 883,831 0 0 883,831
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 2,263,772 0 0 2,263,772
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: NW CO-OP SITE 2: SITE 3: Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2029 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2030 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2031 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2032 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2033 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2034 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2035 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2036 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2037 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2038 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2039 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2040 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2041 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2042 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 2043 3,539,029 2,263,772 0 0 0 0 3,539,029 2,263,772 2,263,772 This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000
2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 50,000
100,000
150,000
200,000
250,000
300,000
350,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 1B
Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 537,200 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 4,338,066 33% of total Total Annual Water Demand (gallons/year): 13,344,900
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 216,854 216,953

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: NE-B NE-C NE-D Freedom West Homes 2.0 Phase 1B Project Address: 889 McAllister Street
735 Gough Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2030 2030 2030 -
Building Type: Mixres Resident Mixres -
Total Building Size (GSF): 172,700 135,000 229,500 537,200 Total Lot Size (ft2): 32,312 24,963 18,212 75,487
Number of Residential Units: 176 135 224 535
Impervious Surface Above Grade (ft2): 28,660 17,538 13,862 60,060 Impervious Surface Below Grade (ft2): 2,737 5,570 3,260 11,567 Irrigated Landscaped Area (ft2): 915 1,855 1,090 3,860

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 1,759,736 0 1,759,736
Blackwater: 2,308,799 0 2,932,782 5,241,581 (includes GW) Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 2,308,799 1,759,736 2,932,782 7,001,317
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 838,983 633,874 1,062,895 2,535,752
Drain Trap Priming: 0 0 0 0
Irrigation: 7,429 15,062 8,850 31,341
Clothes Washing: 582,600 446,881 741,491 1,770,972
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 1,429,013 1,095,816 1,813,237 4,338,066
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: NE-B SITE 2: NE-C SITE 3: NE-D Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2030 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2031 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2032 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2033 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2034 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2035 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2036 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2037 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2038 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2039 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2040 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2041 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2042 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2043 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 2044 2,308,799 1,429,013 1,759,736 1,095,816 2,932,782 1,813,237 7,001,317 4,338,066 4,338,066 This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
7,000,000
8,000,000
2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 100,000
200,000
300,000
400,000
500,000
600,000
700,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 1C
Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 206,400 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 1,111,118 33% of total Total Annual Water Demand (gallons/year): 3,358,100
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 55,527 55,584

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: NE-A Freedom West Homes 2.0 Phase 1C Project Address: 889 McAllister Street
735 Gough Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2030 -
Building Type: Mixres MIPS MIPS -
Total Building Size (GSF): 206,400 0 0 206,400
Total Lot Size (ft2): 37,813 0 0 37,813
Number of Residential Units: 133 0 0 133
Impervious Surface Above Grade (ft2): 28,913 0 0 28,913 Impervious Surface Below Grade (ft2): 6,675 0 0 6,675
Irrigated Landscaped Area (ft2): 2,225 0 0 2,225

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 0 0 0
Blackwater: 1,767,737 0 0 1,767,737 (includes GW)
Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 1,767,737 0 0 1,767,737
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 652,791 0 0 652,791
Drain Trap Priming: 0 0 0 0
Irrigation: 18,066 0 0 18,066
Clothes Washing: 440,260 0 0 440,260
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 1,111,118 0 0 1,111,118
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: NE-A SITE 2: SITE 3: Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2030 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2031 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2032 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2033 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2034 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2035 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2036 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2037 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2038 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2039 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2040 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2041 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2042 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2043 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 2044 1,767,737 1,111,118 0 0 0 0 1,767,737 1,111,118 1,111,118 This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
2,000,000
2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 2A
Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 286,300 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 1,874,706 33% of total Total Annual Water Demand (gallons/year): 5,603,800
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 93,630 93,840

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: SW-E SW-F Freedom West Homes 2.0 Phase 2A Project Address: 550 Fulton Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2033 2033 -
Building Type: Mixres Mixres MIPS -
Total Building Size (GSF): 107,300 179,000 0 286,300
Total Lot Size (ft2): 19,869 19,869 0 39,738
Number of Residential Units: 81 140 0 221
Impervious Surface Above Grade (ft2): 7,720 17,869 0 25,589 Impervious Surface Below Grade (ft2): 21,429 9,280 0 30,709 Irrigated Landscaped Area (ft2): 3,095 5,095 0 8,190

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 0 0 0
Blackwater: 1,073,867 1,852,120 0 2,925,987 (includes GW) Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 1,073,867 1,852,120 0 2,925,987
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 395,854 680,792 0 1,076,646
Drain Trap Priming: 0 0 0 0
Irrigation: 25,130 41,369 0 66,499
Clothes Washing: 268,129 463,432 0 731,561
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 689,113 1,185,593 0 1,874,706
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: SW-E SITE 2: SW-F SITE 3: Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2033 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2034 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2035 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2036 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2037 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2038 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2039 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2040 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2041 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2042 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2043 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2044 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2045 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2046 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 2047 1,073,867 689,113 1,852,120 1,185,593 0 0 2,925,987 1,874,706 1,874,706 This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 50,000
100,000
150,000
200,000
250,000
300,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 2B.1 Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 385,100 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 2,545,697 33% of total Total Annual Water Demand (gallons/year): 7,801,400
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 127,248 127,322

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: SW-A SW-B SW-C Freedom West Homes 2.0 Phase 2B.1 Project Address: 550 Fulton Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2033 2033 2033 -
Building Type: Mixres Mixres Mixres -
Total Building Size (GSF): 187,300 102,700 95,100 385,100 Total Lot Size (ft2): 19,456 19,456 17,325 56,237
Number of Residential Units: 166 74 72 312
Impervious Surface Above Grade (ft2): 15,981 15,981 12,800 44,762 Impervious Surface Below Grade (ft2): 2,605 2,605 3,395 8,605 Irrigated Landscaped Area (ft2): 870 870 1,130 2,870

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 0 0 0
Blackwater: 2,165,922 980,255 949,332 4,095,510 (includes GW) Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 2,165,922 980,255 949,332 4,095,510
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 781,253 360,960 347,390 1,489,602
Drain Trap Priming: 0 0 0 0
Irrigation: 7,064 7,064 9,175 23,303
Clothes Washing: 549,498 244,957 238,336 1,032,791
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 1,337,815 612,981 594,901 2,545,697
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: SW-A SITE 2: SW-B SITE 3: SW-C Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2033 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2034 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2035 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2036 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2037 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2038 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2039 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2040 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2041 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2042 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2043 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2044 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2045 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2046 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 2047 2,165,922 1,337,815 980,255 612,981 949,332 594,901 4,095,510 2,545,697 2,545,697 This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000
4,500,000
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 2B.2 Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 87,800 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 603,347 33% of total Total Annual Water Demand (gallons/year): 1,848,800
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 30,153 30,182

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: SW-D Freedom West Homes 2.0 Phase 2B.2 Project Address: 550 Fulton Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2033 -
Building Type: Mixres MIPS MIPS -
Total Building Size (GSF): 87,800 0 0 87,800
Total Lot Size (ft2): 17,325 0 0 17,325
Number of Residential Units: 74 0 0 74
Impervious Surface Above Grade (ft2): 12,800 0 0 12,800 Impervious Surface Below Grade (ft2): 3,395 0 0 3,395
Irrigated Landscaped Area (ft2): 1,130 0 0 1,130

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 0 0 0
Blackwater: 966,637 0 0 966,637 (includes GW)
Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 966,637 0 0 966,637
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 349,215 0 0 349,215
Drain Trap Priming: 0 0 0 0
Irrigation: 9,175 0 0 9,175
Clothes Washing: 244,957 0 0 244,957
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 603,347 0 0 603,347
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: SW-D SITE 2: SITE 3: Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2033 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2034 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2035 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2036 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2037 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2038 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2039 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2040 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2041 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2042 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2043 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2044 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2045 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2046 966,637 603,347 0 0 0 0 966,637 603,347 603,347
2047 966,637 603,347 0 0 0 0 966,637 603,347 603,347
This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 200,000
400,000
600,000
800,000
1,000,000
1,200,000
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 3A
Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 483,200 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 3,576,576 33% of total Total Annual Water Demand (gallons/year): 10,959,500
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 178,798 178,859

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: SE-B SE-D Freedom West Homes 2.0 Phase 3A Project Address: 710 McAllister Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2033 2033 -
Building Type: Mixres Mixres MIPS -
Total Building Size (GSF): 181,500 301,700 0 483,200
Total Lot Size (ft2): 33,275 29,700 0 62,975
Number of Residential Units: 151 287 0 438
Impervious Surface Above Grade (ft2): 28,825 24,750 0 53,575 Impervious Surface Below Grade (ft2): 3,335 3,700 0 7,035 Irrigated Landscaped Area (ft2): 1,115 1,250 0 2,365

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 0 0 0
Blackwater: 1,996,871 3,771,552 0 5,768,423 (includes GW) Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 1,996,871 3,771,552 0 5,768,423
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 733,644 1,373,850 0 2,107,494
Drain Trap Priming: 0 0 0 0
Irrigation: 9,053 10,149 0 19,203
Clothes Washing: 499,845 950,036 0 1,449,880
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 1,242,541 2,334,035 0 3,576,576
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: SE-B SITE 2: SE-D SITE 3: Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2033 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2034 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2035 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2036 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2037 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2038 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2039 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2040 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2041 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2042 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2043 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2044 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2045 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2046 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 2047 1,996,871 1,242,541 3,771,552 2,334,035 0 0 5,768,423 3,576,576 3,576,576 This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
7,000,000
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 100,000
200,000
300,000
400,000
500,000
600,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

NON-POTABLE WATER CALCULATOR
Project Summary Sheet Freedom West Homes 2.0 Phase 3B
Project Contact: Jim Bond
0 [email protected]
Total Gross Square Footage: 498,800 Estimated Final Site/Building Permit Issuance Date: 1/0/1900

1. Demand and Supply Summary
Demand Met by Non-Potable Supply (gallons/year): 2,999,506 28% of total Total Annual Water Demand (gallons/year): 10,734,600
6-Month Compliance Periods
January - June July - December
Potable Make-Up Allocation (gallons/period): 149,969 149,982

2. Building Information Summary
Site 1 Site 2 Site 3 Project Total
Project / Building Name: SE-A SE-C Freedom West Homes 2.0 Phase 3B Project Address: 710 McAllister Street
San Francisco, CA
Assessor's Block & Lot No. / APN: NO APN INFORMATION -
Date of Completion: 2034 2034 -
Building Type: Mixres Visitor/Hotel MIPS -
Total Building Size (GSF): 388,800 110,000 0 498,800
Total Lot Size (ft2): 23,599 21,157 0 44,756
Number of Residential Units: 311 0 0 311
Impervious Surface Above Grade (ft2): 17,949 11,857 0 29,806 Impervious Surface Below Grade (ft2): 5,150 9,300 0 14,450 Irrigated Landscaped Area (ft2): 500 0 0 500

3. Summary of Non-Potable Demands and Supplies for the Project Non-Potable Supply Estimates
Annual Supply (gpy)
Onsite Alternate Water Sources Site 1 Site 2 Site 3 Project Total Graywater: 0 0 0 0
Blackwater: 4,079,078 2,682,908 0 6,761,986 (includes GW) Condensate: 0 0 0 0
Rainwater/Stormwater: 0 0 0 0
Other Supplies: 0 0 0 0
TOTAL: 4,079,078 2,682,908 0 6,761,986
Non-Potable Demand Estimates
Annual Demand (gpy)
Project Non-Potable Demands Site 1 Site 2 Site 3 Project Total Toilets/Urinals: 1,481,941 484,025 0 1,965,966
Drain Trap Priming: 0 0 0 0
Irrigation: 4,060 0 0 4,060
Clothes Washing: 1,029,481 0 0 1,029,481
HVAC/Cooling: 0 0 0 0
Other Demands: 0 0 0 0
TOTAL: 2,515,481 484,025 0 2,999,506
6/5/2025 7. Project Summary Page 1 of 2

4. Project Phasing
SITE 1: SE-A SITE 2: SE-C SITE 3: Project Total
15-Year Timeframe
(enter dates on Tab 1)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
NP Offset
Supplies
(gpy)
Selected NP
Demand
(gpy)
Re-Used Non-
Potable Supplies
(gpy)
2034 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2035 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2036 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2037 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2038 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2039 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2040 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2041 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2042 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2043 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2044 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2045 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2046 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2047 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 2048 4,079,078 2,515,481 2,682,908 484,025 0 0 6,761,986 2,999,506 2,999,506 This offset analysis assumes the full year of supplies is available to offset non-potable demands. Some scenarios may require storage to allow excess supplies from one part of the year to be used in later months with available demand.
0 1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
7,000,000
8,000,000
2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 Gallons per Year
Year
Onsite Supplies and Non-Potable Demand Over 15-Year Timeframe Total Onsite Supply Total Non-potable Demand
0 100,000
200,000
300,000
400,000
500,000
600,000
January February March April May June July August September October November December Gallons Per Month
Selected Onsite Supply vs. Selected Non-Potable Demand (All Sites On-Line) Total Onsite Supply Total Non-potable Demand
6/5/2025 7. Project Summary Page 2 of 2

CleanPowerSF Sfpuc CommissionJuly 22, 2025

CleanPowerSF Sfpuc Commission
July 22, 2025