San Bruno City Council
January 24, 2023

Regional and Local
Bay Area Air Quality Management District
BAAQMD is the regional government agency that regulates sources of air pollution within the nine San Francisco Bay Area counties. The BAAQMD regulates GHG emissions through the following plans, programs, and guidelines.
2017 Clean Air Plan
To protect the climate, the 2017 CAP (prepared by BAAQMD) includes control measures designed to reduce emissions of methane and other super-GHGs that are potent climate pollutants in the nearterm, and to decrease emissions of carbon dioxide by reducing fossil fuel combustion.

CEQA Air Quality Guidelines
The BAAQMD CEQA Air Quality Guidelines are intended to serve as a guide for those who prepare or evaluate air quality impact analyses for projects and plans in the San Francisco Bay Area. The jurisdictions in the San Francisco Bay Area Air Basin utilize the thresholds and methodology for 2023-2031 Housing Element Update 127 Initial Study
City of San Bruno December 2022 (Revised January 2023)
assessing GHG impacts developed by BAAQMD within the CEQA Air Quality Guidelines. The guidelines include information on legal requirements, BAAQMD rules, methods of analyzing impacts, and recommended mitigation measures.

CEQA Thresholds of Significance for Climate Impacts
The BAAQMD CEQA Air Quality Guidelines (see discussion above) also included thresholds of significance for greenhouse gas emissions. For projects that are not located within a jurisdiction with an adopted GHG Reduction Strategy or projects that would be inconsistent with an adopted GHG Reduction Strategy, the Guidelines recommended a GHG emissions threshold of 1,100 metric tons (MT) or 4.6 MT per year per capita. These thresholds were developed based on meeting the 2020 GHG target of reducing statewide GHG emissions 80 percent below 1990 levels as set forth in the scoping plan that addressed AB 32. Interpolation of the 2020 GHG target through the year 2031 (when buildout of the Housing Element Update would be complete) results in a GHG emissions significance threshold of 2.7 MTCO2e per year per capita.

On April 20, 2022, BAAQMD adopted new qualitative thresholds for assessing the impacts that projects and plans would have on climate change. BAAQMD provided a justification report that described these new qualitative thresholds that are recommended for lead agencies to consider when approving projects or plans through the CEQA process.73 For land use projects, BAAQMD developed plan- and project-level thresholds that evaluate the significance of operational GHG emissions based on its effect on the State’s efforts to meet the identified long-term climate goals. These thresholds are identified in Table 4.8-1 below.

Table 4.8-1: BAAQMD GHG Significance Thresholds
Plan-Level Thresholds
A. Meet the State’s goals to reduce emissions to 40 percent below 1990 levels by 2030 and carbon neutrality by 2045; or
B. Be consistent with a local GHG reduction strategy that meets the criteria under State CEQA Guidelines Section 15183.5(b).

Project-Level Thresholds
A. Projects must include, at a minimum, the following project design elements:

1. Buildings
a. The project will not include natural gas appliances or natural gas plumbing (in both residential and nonresidential development).
b. The project will not result in any wasteful, inefficient, or unnecessary energy usage as determined by the analysis required under CEQA Section 21100(b)(3) and Section 15126.2(b)of the State CEQA Guidelines.

2. Transportation
a. Achieve a reduction in project-generated vehicle miles traveled (VMT) below the regional average consistent with the current version of the California Climate Change Scoping Plan 73 Bay Area Air Quality Management District. CEQA Thresholds for Evaluating the Significance of Climate Impacts from Land Use Projects and Plans. April 2022.
2023-2031 Housing Element Update 128 Initial Study
City of San Bruno December 2022 (Revised January 2023)
(currently 15 percent) or meet a locally adopted Senate Bill 743 VMT target, reflecting the recommendations provided in the Governor’s Office of Planning and Research's Technical Advisory on Evaluating Transportation Impacts.
b. Achieve compliance with off-street electric vehicle requirements in the most recently adopted version of CALGreen Tier 2.

B. Be consistent with a local GHG reduction strategy that meets the criteria under State CEQA Guidelines Section 15183.5(b).

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating greenhouse gas emissions impacts resulting from planned development within the City, including the following:

Policies Description
T-F Provide efficient local transit—such as a shuttle system—to the BART and Caltrain stations to avoid dependence on individual motor vehicles.

ERC-13 Through environmental review, assure that all projects affecting resources of regional concern (e.g., the San Francisco garter snake habitat, water and air quality, the San Francisco Fish and Game Reserve) satisfy regional, State and federal laws.

ERC-25 Maintain and improve air quality by requiring project mitigation, such as Transportation Demand Management (TDM) techniques, where air quality impacts are unavoidable.

ERC-31 Prepare a Greenhouse Gas Emissions Reduction Plan, focusing on feasible actions the City can take to minimize the adverse impacts of Plan implementation on climate change and air quality. The Plan will include but will not be limited to:
• An inventory of all known, or reasonably discoverable, sources of greenhouse gases (GHGs) that currently exist in the City and sources that existed in 1990. In determining what is a source of GHG emissions, the City may rely on the definition of “greenhouse gas emissions source” or “source” as defined in section 38505 of the California Global Warming Solutions Act (“AB 32”) or its governing regulations.

The inventory may include estimates of emissions drawing on available information from State and regional air quality boards, supplemented by information obtained by the City.
• A projected inventory of the new GHGs that can reasonably be expected to be emitted in the year 2025 due to the City’s discretionary land use decisions pursuant to the 2025 General Plan Update, as well as new GHGs emitted by the City’s internal government operations. The projected inventories will include estimates, supported by substantial evidence, of future emissions from planned land use and information from state and regional air quality boards and agencies. • A target for the reduction of those sources of future emissions reasonably attributable to the City’s discretionary land use decisions under the 2025 General Plan and the City’s internal government operations, and feasible GHG emission reduction measures whose purpose shall be to meet this reduction target by regulating those sources of GHG emissions reasonably attributable to the City’s discretionary land use decisions and the City’s internal government operations. 2023-2031 Housing Element Update 129 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
ERC-33 Require all large construction projects to mitigate diesel exhaust emissions through use of alternate fuels and control devices.

Transit Corridors Plan
As noted in Section 3.1.1.1, Housing Opportunity Sites 1, 2, 4, 5, 7, 9, 11, 12, 15, 17, 20, 21, 22, and 23 are located within the TCP area. Chapter Seven of the TCP includes the following policies designed to reduce emissions associated with vehicle traffic.

Policies Description
Trans-F Develop and implement a Transportation Demand Management (TDM) Program that reduces the amount of peak period motor vehicle traffic and encourages the use of modes other than the single-occupant vehicle.

Trans B-1 Provide a local circulator shuttle service between the Downtown, BART station, and Caltrain station, with potential stops at the San Francisco International Airport Trans C-2 Provide a network of bicycle priority streets that provide linkages throughout the Plan area. As appropriate, bicycle priority streets should provide traffic-calming measures to limit vehicle travel and speeds.

Trans C-4 Implement a citywide bicycle parking ordinance that specifies bicycle parking, locker, and shower requirements.

Bayhill Specific Plan
As noted in Section 3.1.1.1, Housing Opportunity Sites 3 and 13 are located within the Bayhill Specific Plan area. In addition to the Bayhill Specific Plan policies designed to reduce air quality impacts (refer to Section 4.3.1.2), Chapter Six of the Bayhill Specific Plan includes mandatory “Environmental Quality Policies”, including the following which pertain to greenhouse gas emissions.

Policy 6-14
Policy 6-14 requires all future development within the Bayhill Specific Plan area to reduce construction-related GHG emissions by implementing the recommended best management practices provided in BAAQMD’s 2017 CEQA Guidelines.

Policy 6-15
Policy 6-15 requires all future development within the Bayhill Specific Plan to achieve LEED Silver Certification or equivalent, use electric space and water heaters, employ solar panels on 30 percent of the roof, and implement recycling and reusable produce use programs.

Policy 6-16
Policy 6-16 requires all future development within the Bayhill Specific Plan that does not comply with Policy 6-15 to purchase GHG mitigation credits equivalent to the GHG emissions reductions that would be provided by implementation of Policy 6-15. 2023-2031 Housing Element Update 130 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policy 6-17
Policy 6-17 encourages building owners within the Bayhill Specific Plan to engage in PG&E Energy Efficiency and/or San Mateo County Energy Efficiency programs.

4.8.1.3 Existing Conditions
Unlike emissions of criteria and toxic air pollutants, which have regional and local impacts, emissions of GHGs have a broader, global impact. Global warming is a process whereby GHGs accumulating in the upper atmosphere contribute to an increase in the temperature of the earth and changes in the weather patterns.

The U.S. EPA reported that in 2018, total gross nationwide GHG emissions were 6,676.6 million metric tons (MMT) carbon dioxide equivalent (CO2e).74 These emissions were lower than peak levels of 7,416 MMT that were emitted in 2007. CARB updates the statewide GHG emission inventory on an annual basis where the latest inventory includes 2000 through 2017 emissions.75 In 2017, GHG emissions from statewide emitting activities were 424 MMT. The 2017 emissions have decreased by 14 percent since peak levels in 2004 and are 7 MMT below the 1990 emissions level and the State’s 2020 GHG limit. Per capita GHG emissions in California have dropped from a 2001 peak of 14.1 MT per person to 10.7 MT per person in 2017. The most recent Bay Area emission inventory was computed for the year 2011.76 The Bay Area GHG emission were 87 MMT. As a point of comparison, statewide emissions were about 444 MMT in 2011.

4.8.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Generate greenhouse gas (GHG) emissions,
either directly or indirectly, that may have a
significant impact on the environment?
2) Conflict with an applicable plan, policy, or
regulation adopted for the purpose of reducing
the emissions of GHGs?
74 United States Environmental Protection Agency. Inventory of U.S. Greenhouse Gas Emissions and Sinks 1990- 2018. Accessed October 24, 2022. https://www.epa.gov/sites/production/files/2020-04/documents/us-ghg-inventory2020-main-text.pdf 75 California Air Resources Board. 2019 Edition, California Greenhouse Gas Emission Inventory: 2000 – 2017.

Accessed October 24, 2022. https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2017/ghg_inventory_trends_00-

17.pdf
76 Bay Area Air Quality Management District. Bay Area Emissions Inventory Summary Report: Greenhouse Gases Base Year 2011. Accessed October 24, 2022. http://www.baaqmd.gov/~/media/files/planning-andresearch/emission-inventory/by2011_ghgsummary.pdf 2023-2031 Housing Element Update 131 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.8.2.1 Approach to Greenhouse Gas Emissions Analysis
The discussion under Impact GHG-1 evaluates whether the GHG emissions generated by buildout of all Housing Opportunity Sites at the densities assumed by the Housing Element Update would exceed a 2.7 MTCO2e per year per capita threshold (refer to the discussion in Section 4.8.1.2 under “CEQA Thresholds of Significance for Climate Impacts”). Additionally, since the City of San Bruno does not have an adopted GHG Reduction Strategy, the discussion under Impact GHG-2 assesses, based on the latest BAAQMD thresholds of significance for climate impacts, whether the project would meet the State’s goals to reduce emissions to 40 percent below 1990 levels by 2030 and carbon neutrality by 2045. Consistent with this approach, the discussion under Impact GHG-2 analyzes whether the Housing Element Update as a whole would conflict with AB 32, SB 32, Senate Bill 375 and Plan Bay Area 2050, and the 2017 Clean Air Plan.

Impact GHG-1: The project would not generate GHG emissions, either directly or indirectly, that may have a significant impact on the environment. (Less than Significant Impact with Mitigation Incorporated)
Construction-Related GHG Emissions
Construction of future development under the Housing Element Update would result in the temporary generation of GHG emissions. Emissions would originate from mobile and stationary construction equipment exhaust and employee and haul truck vehicle exhaust. Construction-related GHG emissions would vary substantially depending on the level of activity, length of the construction period, specific construction operations, types of equipment, and number of personnel.

BAAQMD has not established a quantitative threshold for assessing construction-related GHG emissions. Rather, BAAQMD recommends evaluating whether construction activities would conflict with statewide emission reduction goals and implement feasible Best Management Practices. Mitigation Measure GHG-1.1 below would require future development under the Housing Element Update to comply with these measures; accordingly, construction of future development would not generate GHG emissions that would have a significant impact on the environment. (Less than Significant Impact with Mitigation Incorporated)
Mitigation Measures:

MM GHG-1.1: Prior to approval, the 2023-2031 Housing Element shall be include a policy requiring applicants and their contractors to implement the following measures prior to and during construction:
a. Prior to issuance of any discretionary permits that would allow demolition or construction (grading, excavation, building, etc.) activities at the Housing Opportunity Sites, the applicant shall submit a construction management plan that demonstrates that:
• Alternative fueled (e.g. biodiesel, electric) construction vehicles/equipment shall make up at least 15 percent of the fleet; 2023-2031 Housing Element Update 132 Initial Study
City of San Bruno December 2022 (Revised January 2023)
• Buildings shall be constructed with local building materials of at least 10 percent (sourced from within 100 miles of the City limits); and
• Contractors shall recycle and reuse at least 50 percent of construction waste or demolition materials.

Operational-Related GHG Emissions
Buildout of the Housing Opportunity Sites identified in Table 3.2-1 at the densities assumed by the Housing Element Update would result in the construction of 2,709 housing units, including an estimated six single-family residences, 967 low-rise apartment units, and 1,735 mid-rise apartment units.77 GHG emissions generated by buildout of all the Housing Opportunity Sites through the year 2031 was estimated using the California Emissions Estimator Model (CalEEMod) Version 2020.4.0 and compared to the 2.7 MTCO2e per year per capita threshold identified in Sections 4.8.1.2 and

4.8.2.1 above. The methodology, data inputs, assumptions, and results are described further in Appendix A. Table 4.8-2 below shows the annual and per year per capita emissions resulting from operation of future development under the Housing Element Update. 77At the time of analysis, the technical studies prepared for the Housing Element Update assumed buildout would result in six single-family residences, 967 low-rise apartment units, and 1,735 mid-rise apartment units. The City now anticipates that buildout of the Housing Element Update would result in 138 single-family detached, 836 lowrise apartment, and 1,735 mid-rise apartment units, which corresponds with an additional 363 daily vehicle trips.

This represents an increase of approximately two percent in the number of vehicle trips, which the Air Quality, Greenhouse Gas Emissions, Noise, Vibration, and Transportation consultants have confirmed would not change the conclusions presented in this Initial Study and Appendices A, B, and C. Appendix D and the associated water supply analysis are unaffected by this change.
2023-2031 Housing Element Update 133 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Table 4.8-2: Calculated GHG Emissions of the Housing Element Update Source Category GHG Emissions (MTCO2e)
Area 139
Energy Consumption 1,812
Mobile 7,032
Solid Waste Generation 629
Water Usage 240
Total MTCO2e 9,852
Project Population1 7,1502
Project Per Year Per Capita Emissions 1.38 MTCO2e/year/per capita Significance Threshold 2.7 MTCO2e/year/per capita
Exceed Threshold? No
Source: Illingworth & Rodkin, Inc. San Bruno 2023-2031 Housing Element Update Air Quality & Greenhouse Gas Assessment. September 14, 2022.

Notes:
1 Refer to Section 4.14 Population and Housing of this Initial Study. 2 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study.

As shown in Table 4.8-2, GHG emissions generated by buildout of the Housing Element Update would not generate GHG emissions in excess of the interpolated 2031 MTCO2e per year per capita threshold. Further, the emissions reported in Table 4.8-2 are conservative, since they do not take into account the GHG emissions generated by existing uses or the GHG reductions that would be achieved with adherence to the policies and mitigation measures identified in the General Plan, TCP, and Bayhill Specific Plan and their associated EIRs. Therefore, the project would support state goals for reducing emissions to 40 percent below 1990 levels by 2030.

As noted in the 2022 CARB Scoping Plan, approximately 35 percent of California’s GHG reduction potential is from local activities that local governments have authority over.78 Accordingly, while reducing GHG emissions associated with private development is a critical component in achieving carbon neutrality, even reducing GHG emissions associated with private development to net zero through direct mitigation or purchase of equivalent GHG credits (which would be economically infeasible) cannot by itself achieve carbon neutrality. As discussed above, GHG emissions generated by buildout of the Housing Opportunity Sites at the densities assumed in the Housing Element would be well below the interpolated 2031 MTCO2e per year per capita threshold, demonstrating that the project is aligned with the state’s goal of achieving carbon neutrality. Future development under the 78 California Air Resources Board. Draft 2022 Scoping Plan Update, Appendix D. May 10, 2022. 2023-2031 Housing Element Update 134 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Housing Element Update can further support the state’s goal of carbon neutrality with implementation of the following mitigation measure.

Mitigation Measures:

MM GHG-1.2: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites to demonstrate adherence with the following design measures prior to issuance of any discretionary permits that would allow construction of residential units:
a. Construction of natural gas infrastructure and the use of natural gas appliances shall be prohibited;
b. Future developments shall include all electric appliances; c. At a minimum, future development shall comply with off-street electric vehicle requirements in the most recently adopted version of CALGreen Tier 2 requirements.

Application of the design measures identified in MM GHG-1.2 would ensure that all future residential development under the Housing Element Update would be consistent with BAAQMD’s project-level thresholds for building design. Additionally, as discussed in Section 4.17 Transportation under Impact TRN-2, buildout of the Housing Element Update would reduce VMT by 0.07 VMT per capita, and all future development would result in a VMT per resident 15 percent or greater below the regional average. Accordingly, future development under the Housing Element Update would be consistent with the plan- and project-level thresholds set forth by BAAQMD that are designed to support the State’s long-term goal of carbon neutrality. For these reasons, the project would not generate GHG emissions that would have a significant impact on the environment. (Less than Significant Impact with Mitigation Incorporated)
Impact GHG-2: The project would not conflict with an applicable plan, policy, or regulation adopted for the purpose of reducing the emissions of GHGs. (Less than Significant Impact)
AB 32 and SB 32
AB 32 as originally adopted in 2006 set forth targets that would reduce statewide GHG emissions to 1990 levels by 2020. SB 32 amended AB 32 and set forth targets to reduce statewide GHG emissions to 40 percent below the 1990 level by 2030. As discussed under Impact GHG-1, the project supports the State’s short-term goal of achieving a 40 percent reduction in GHG emissions below 1990 levels by 2030. Further, the Housing Element Update would support the State’s long-term goal of achieving carbon neutrality by 2045. Accordingly, the project would not conflict with AB 32 or SB 32. (Less than Significant Impact)
SB 375 and Plan Bay Area 2050
As discussed in Section 4.8.1.2, Plan Bay Area 2050 is the SB 375-mandated SCS for the ninecounty Bay Area region, which encompasses the City of San Bruno. Plan Bay Area 2050 establishes 2023-2031 Housing Element Update 135 Initial Study
City of San Bruno December 2022 (Revised January 2023)
a course for reducing per capita GHG emissions through the promotion of compact, high-density, mixed-use neighborhoods near transit, particularly within identified Priority Development Areas (PDAs).

With the exception of Housing Opportunity Sites 6 and 8, all of the Housing Opportunity Sites are located within a PDA.79 The Transportation Analysis (refer to Appendix C) analyzed the VMT generated by future development at Sites 6 and 8, and found that the VMT per resident would be 15 percent below the regional average or greater. As a whole, the Housing Element Update would reduce VMT by 0.07 VMT per resident. Further, the Housing Element Update addresses the City’s regional housing needs allocation upon which Plan Bay Area 2050 is based; therefore the project directly supports implementation of Plan Bay Area 2050 and by extension, SB 375. (Less than Significant Impact)
2017 Clean Air Plan
As discussed in detail in Section 4.4 Air Quality under Impact AIR-1, the Housing Element Update is consistent with the 2017 Clean Air Plan. (Less than Significant Impact) 2022 CARB Scoping Plan
As discussed under Impact GHG-1, the project supports the State’s short-term goal of achieving a 40 percent reduction in GHG emissions below 1990 levels by 2030 and the State’s long-term goal of achieving carbon neutrality. Therefore, the project would not conflict with the 2022 CARB Scoping Plan. (Less than Significant Impact)
79 Metropolitan Transportation Commission. “Priority Development Areas (Plan Bay Area 2050)”. Accessed October 6, 2022. https://opendata.mtc.ca.gov/datasets/priority-development-areas-plan-bay-area-2050 2023-2031 Housing Element Update 136 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.9 HAZARDS AND HAZARDOUS MATERIALS

4.9.1 Environmental Setting

4.9.1.1 Regulatory Framework
Overview
The storage, use, generation, transport, and disposal of hazardous materials and waste are highly regulated under federal and state laws. In California, the EPA has granted most enforcement authority over federal hazardous materials regulations to the California Environmental Protection Agency (CalEPA). In turn, local agencies have been granted responsibility for implementation and enforcement of many hazardous materials regulations under the Certified Unified Program Agency (CUPA) program.

Worker health and safety and public safety are key issues when dealing with hazardous materials.

Proper handling and disposal of hazardous material is vital if it is disturbed during project construction. Cal/OSHA enforces state worker health and safety regulations related to construction activities. Regulations include exposure limits, requirements for protective clothing, and training requirements to prevent exposure to hazardous materials. Cal/OSHA also enforces occupational health and safety regulations specific to lead and asbestos investigations and abatement.

Federal and State
Federal Aviation Regulations Part 77
Federal Aviation Regulations, Part 77 Objects Affecting Navigable Airspace (FAR Part 77) sets forth standards and review requirements for protecting the airspace for safe aircraft operation, particularly by restricting the height of potential structures and minimizing other potential hazards (such as reflective surfaces, flashing lights, and electronic interference) to aircraft in flight. These regulations require that the Federal Aviation Administration (FAA) be notified of certain proposed construction projects located within an extended zone defined by an imaginary slope radiating outward for several miles from an airport’s runways, or which would otherwise stand at least 200 feet in height above the ground.

Comprehensive Environmental Response, Compensation, and Liability Act The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), commonly known as Superfund, was enacted by Congress on December 11, 1980. This law created a tax on the chemical and petroleum industries and provided broad federal authority to respond directly to releases or threatened releases of hazardous substances that may endanger public health or the environment. Over five years, $1.6 billion was collected and the tax went to a trust fund for cleaning up abandoned or uncontrolled hazardous waste sites. CERCLA accomplished the following objectives:
• Established prohibitions and requirements concerning closed and abandoned hazardous waste sites;
2023-2031 Housing Element Update 137 Initial Study
City of San Bruno December 2022 (Revised January 2023)
• Provided for liability of persons responsible for releases of hazardous waste at these sites; and
• Established a trust fund to provide for cleanup when no responsible party could be identified.

The law authorizes two kinds of response actions:
• Short-term removals, where actions may be taken to address releases or threatened releases requiring prompt response; and
• Long-term remedial response actions that permanently and significantly reduce the dangers associated with releases or threats of releases of hazardous substances that are serious, but not immediately life-threatening. These actions can be completed only at sites listed on the EPA’s National Priorities List.

CERCLA also enabled the revision of the National Contingency Plan (NCP). The NCP provided the guidelines and procedures needed to respond to releases and threatened releases of hazardous substances, pollutants, or contaminants. The NCP also established the National Priorities List.

CERCLA was amended by the Superfund Amendments and Reauthorization Act on October 17, 1986.80
Resource Conservation and Recovery Act
The Resource Conservation and Recovery Act (RCRA), enacted in 1976, is the principal federal law in the United States governing the disposal of solid waste and hazardous waste. RCRA gives the EPA the authority to control hazardous waste from the “cradle to the grave.” This includes the generation, transportation, treatment, storage, and disposal of hazardous waste. RCRA also sets forth a framework for the management of non-hazardous solid wastes.

The Federal Hazardous and Solid Waste Amendments (HSWA) are the 1984 amendments to RCRA that focused on waste minimization, phasing out land disposal of hazardous waste, and corrective action for releases. Some of the other mandates of this law include increased enforcement authority for the EPA, more stringent hazardous waste management standards, and a comprehensive underground storage tank program.81
Government Code Section 65962.5
Section 65962.5 of the Government Code requires CalEPA to develop and update a list of hazardous waste and substances sites, known as the Cortese List. The Cortese List is used by state and local agencies and developers to comply with CEQA requirements. The Cortese List includes hazardous substance release sites identified by the Department of Toxic Substances Control (DTSC) and State Water Resources Control Board (SWRCB).82
80 United States Environmental Protection Agency. “Superfund: CERCLA Overview.” Accessed October 24, 2022. https://www.epa.gov/superfund/superfund-cercla-overview. 81 United States Environmental Protection Agency. “Summary of the Resource Conservation and Recovery Act.” Accessed October 22, 2022. https://www.epa.gov/laws-regulations/summary-resource-conservation-and-recoveryact. 82 California Environmental Protection Agency. “Cortese List Data Resources.” Accessed October 24, 2022. https://calepa.ca.gov/sitecleanup/corteselist/.
2023-2031 Housing Element Update 138 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Toxic Substances Control Act
The Toxic Substances Control Act (TSCA) of 1976 provides the EPA with authority to require reporting, record-keeping and testing requirements, and restrictions relating to chemical substances and/or mixtures. Certain substances are generally excluded from TSCA, including, among others, food, drugs, cosmetics, and pesticides. The TSCA addresses the production, importation, use, and disposal of specific chemicals including polychlorinated biphenyls (PCBs), asbestos, radon, and leadbased paint.

California Accidental Release Prevention Program
The California Accidental Release Prevention (CalARP) Program aims to prevent accidental releases of regulated hazardous materials that represent a potential hazard beyond the boundaries of a property. Facilities that are required to participate in the CalARP Program use or store specified quantities of toxic and flammable substances (hazardous materials) that can have off-site consequences if accidentally released. The San Mateo County Environmental Health Services Department reviews CalARP risk management plans as the CUPA.

Asbestos-Containing Materials
Friable asbestos is any asbestos-containing material (ACM) that, when dry, can easily be crumbled or pulverized to a powder by hand, allowing the asbestos particles to become airborne. Common examples of products that have been found to contain friable asbestos include acoustical ceilings, plaster, wallboard, and thermal insulation for water heaters and pipes. Common examples of nonfriable ACMs are asphalt roofing shingles, vinyl floor tiles, and transite siding made with cement.

The EPA began phasing out use of friable asbestos products in 1973 and issued a ban in 1978 on manufacture, import, processing, and distribution of some asbestos-containing products and new uses of asbestos products.83 The EPA is currently considering a proposed ban on ongoing use of asbestos.84 National Emission Standards for Hazardous Air Pollutants (NESHAP) guidelines require that potentially friable ACMs be removed prior to building demolition or remodeling that may disturb the ACMs.

HSC Division 13, Section 19827.5
California Health and Safety Code Section 19827.5 prohibits the issuance of demolition permits prior to the receipt of a written asbestos notification confirming that the building that has been submitted to the United States Environmental Protection Agency or to a designated state agency, or both, pursuant to Part 61 of Title 40 of the Code of Federal Regulations, or the successor to that part. The permit may be issued without the applicant submitting a copy of the written notification if the applicant declares that the notification is not applicable to the scheduled demolition project. 83 United States Environmental Protection Agency. “EPA Actions to Protect the Public from Exposure to Asbestos.” Accessed October 24, 2022. https://www.epa.gov/asbestos/epa-actions-protect-public-exposure-asbestos 84 Ibid. 2023-2031 Housing Element Update 139 Initial Study
City of San Bruno December 2022 (Revised January 2023)
CCR Title 8, Section 1532.1
The United States Consumer Product Safety Commission banned the use of lead-based paint in 1978.

Removal of older structures with lead-based paint is subject to requirements outlined by the Cal/OSHA Lead in Construction Standard, CCR Title 8, Section 1532.1 during demolition activities.

Requirements include employee training, employee air monitoring, and dust control. If lead-based paint is peeling, flaking, or blistered, it is required to be removed prior to demolition.

Regional and Local
Municipal Regional Permit Provision C.12.f
Polychlorinated biphenyls (PCBs) were produced in the United States between 1955 and 1978 and used in hundreds of industrial and commercial applications, including building and structure materials such as plasticizers, paints, sealants, caulk, and wood floor finishes. In 1979, the EPA banned the production and use of PCBs due to their potential harmful health effects and persistence in the environment. PCBs can still be released to the environment today during demolition of buildings that contain legacy caulks, sealants, or other PCB-containing materials.

With the adoption of the San Francisco Bay Region Municipal Regional Stormwater National Pollutant Discharge Elimination System (NPDES) Permit (MRP) by the San Francisco Bay Regional Water Quality Control Board on November 19, 2015, Provision C.12.f requires that permittees develop an assessment methodology for applicable structures planned for demolition to ensure PCBs do not enter municipal storm drain systems.85 Municipalities throughout the Bay Area are currently modifying demolition permit processes and implementing PCB screening protocols to comply with Provision C.12.f. Buildings constructed between 1950 and 1980 that are proposed for demolition must be screened for the presence of PCBs prior to the issuance of a demolition permit. Single-family homes and wood-frame structures are exempt from these requirements.

Bay Area Air Quality Management District
BAAQMD is vested with authority to regulate airborne pollutants through both inspection and law enforcement, and is to be notified 10 days in advance of any proposed demolition or abatement work.

The BAAQMD regulates the demolition of buildings and structures that may contain asbestos. The provisions that cover these operations are found in BAAQMD Regulation 11, Rule 2: Hazardous Materials; Asbestos Demolition, Renovation and Manufacturing. Individual project contractors are required to implement standard state and federal procedures for asbestos containment and worker safety. The demolition or removal of asbestos-containing building materials is subject to the limitations of BAAQMD Regulation 11, Rule 2. The rule requires special handling of asbestoscontaining material (e.g., by keeping materials continuously wetted). Rule 2 prohibits any visible emissions of asbestos-containing material to outside air. Individual project applicants are required to consult with the BAAQMD’s Enforcement Division prior to commencing demolition of a building containing asbestos materials.
85 California Regional Water Quality Control Board. San Francisco Bay Region Municipal Regional Stormwater NPDES Permit. November 2015.
2023-2031 Housing Element Update 140 Initial Study
City of San Bruno December 2022 (Revised January 2023)
San Mateo County Comprehensive Airport Land Use Plan
The ALUCP for the Environs of the San Francisco International Airport (SFO), prepared by the City/County Association of Governments of San Mateo County (C/CAG), is a State-mandated land use compatibility plan that addresses the compatibility of surrounding land uses in local jurisdictions with airport operations.

The ALUCP establishes safety compatibility policies to protect public health and safety by minimizing the public’s exposure to the risk associated with potential aircraft accidents in the airport vicinity. The ALUCP identifies five safety compatibility zones in the vicinity of SFO.

The ALUCP also establishes airport vicinity height limitations to protect public safety, health, and welfare by ensuring that aircraft can safely fly in the airspace around an airport and to protect the operational capability of airports. As noted in the ALUCP, the height of new development must be maintained below critical aeronautical surfaces.

Noise compatibility policies described within the ALUCP are intended to minimize the exposure of residents and occupants of future noise-sensitive development to excessive noise. CNEL noise contours identify areas where noise exposure is great enough to warrant land use controls to promote noise compatibility. The ALUCP includes forecasted 2015 and 2020 CNEL noise contours. Included in the ALUCP are policies and standards to protect people living in the vicinity of SFO from the effects of aircraft noise. Policy NP-2, Airport/Land Use Compatibility Criteria, establishes criteria to determine the compatibility of proposed land uses in the Airport Noise Compatibility Zones.

Commercial uses, including office and general retail, are considered compatible with noise levels up to 75 dB. Public and institutional uses are generally considered to be conditionally compatible with noise levels up to 70 dB and generally incompatible with noise levels above 70 dB. Residential uses are compatible with noise levels below 65 dB, conditionally compatible with noise levels between 65 and 70 dB, and generally incompatible with noise levels in excess of 70 dB.

San Mateo County Office of Emergency Services
The San Mateo County Office of Emergency Services maintains the Countywide Emergency Operations Plan (EOP). Revised in May 2015, the EOP establishes policies and procedures and assigns responsibilities to ensure the effective management of operations in the event of an emergency.

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating impacts of hazards and hazardous materials resulting from planned development within the City, including the following:

Policies Description
LUD-E Ensure that new development, especially in residential neighborhoods, is sensitive to existing uses, and is of the highest quality design and construction. 2023-2031 Housing Element Update 141 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
LUD-76 Assure that new development mitigates impacts on existing public services, including transit services, water, sewer, and storm drainage systems, police and fire protection, libraries, and parks and recreation facilities.

OSR-33 Balance fire prevention goals with the preservation of the mature tree stands along the city’s scenic corridors, including Sneath Lane, Skyline Boulevard, I-280, and Crystal Springs Road, consistent with the Tree Preservation Ordinance and Ordinance 1284.

Landscaping of public rights-of-way along these corridors should complement the natural state.

ERC-12 Balance the need for fire safety and invasive plant species management with new considerations along the city’s scenic corridors. Encourage buildings to be locked outside of the tree’s drip-line or 12 feet from the tree trunk, whichever is greater, and/or incorporating special techniques to minimize root damage, etc.

ERC-19 Regulate new development – specifically industrial uses – as well as construction and demolition practices to minimize pollutant and sediment concentrations in receiving waters and ensure waterbodies within San Bruno and surface water discharged into San Francisco Bay meets or exceeds relevant regulatory water quality standards.

ERC-20 Require implementation of Best Management Practices to reduce accumulation of nonpoint source pollutants in the drainage system originating from streets, parking lots, residential areas, businesses, and industrial operations.

ERC-21 Continue programs to inform residents of the environmental effects of dumping household waste, such as motor oil, into storm drains that eventually discharge into San Francisco Bay.

ERC-22 Regularly measure and monitor water quality in San Bruno’s surface water to ensure maintenance of high quality water for consumption by humans and other species throughout the region.

ERC-23 Regulate new development to minimize stormwater runoff rates and volumes generated by impervious surfaces, and maximize recharge of local groundwater aquifers when feasible. Utilize the recommendations provided in the Bay Area Stormwater Management Agency’s Start at the Source Design Guidance Manual for Stormwater Quality Protection.

ERC-24 Require that new development incorporate features into site drainage plans that reduce impermeable surface area and surface runoff volumes. Such features may include:
• Additional landscaped areas including canopy trees and shrubs; Reducing building footprint;
• Removing curbs and gutters from streets and parking areas where appropriate to allow stormwater sheet flow into vegetated areas;
• Permeable paving and parking area design;
• Stormwater detention basins to facilitate infiltration; and • Building integrated or subsurface water retention facilities to capture rainwater for use in landscape irrigation and other non-potable uses.

HS-C Reduce the potential for damage from seismic hazards through geotechnical analysis, hazard abatement, emergency preparedness, and recovery planning.

HS-E Ensure the health, safety, and welfare of San Bruno residents by requiring appropriate use, disposal, and transport of hazardous materials.
2023-2031 Housing Element Update 142 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
HS-G Ensure that all development heeds safety precautions from the San Francisco International Airport.

HS-23 Ensure appropriate clean-up of all former commercial and industrial sites according to relevant regulatory standards prior to reuse.

HS-24 Control the transport of hazardous substances to minimize potential hazards to the local population. Identify appropriate regional and local routes for transportation of hazardous materials, and require that fire and emergency personnel can easily access these routes for response to spill incidents.

HS-25 Review and revise City regulations regarding manufacturing, storage, and usage of hazardous materials as necessary to minimize potential hazards.

HS-26 Restrict siting of businesses that use, store, process, or dispose of large quantities of hazardous materials in areas subject to seismic fault rupture or strong ground shaking (Figure 7-2).

HS-27 Initiate a public awareness campaign—through flyers, website, and mailings—about household hazardous waste management, control, and recycling through San Mateo County programs and San Bruno Garbage.

HS-28 Require that lead-based paint and asbestos surveys be conducted by qualified personnel prior to structural demolition or renovation, in buildings constructed prior to 1980.

HS-29 Require abatement of lead-based paint and asbestos prior to structural renovation and demolition, and compliance with all State, federal, OSHA, Bay Area Air Quality Management District, and San Mateo County Health, Environmental Health Division rules and regulations.

HS-30 Regulate development on sites with known or suspected contamination of soil and/or groundwater to ensure that construction workers, the public, future occupants, and the environment are adequately protected from hazards associated with contamination, in accordance with federal, State, and local rules, regulations, policies, and guidelines.

HS-31 Require that developers compact infill soil following the removal of underground storage tanks.

HS-37 Require that all sponsors of new housing (residential and senior housing units) record a notice of Fair Disclosure, regarding the proximity of the proposed development to San Francisco International Airport and of the potential impacts of aircraft operation, including noise impacts, per Ordinance 1646 and AB 2776.

HS-39 Pursue mitigation of noise impacts from the San Francisco International Airport to the fullest extent possible. Support and advocate for operational practices, changes to aircraft, new technologies, and physical improvements that would reduce the area in San Bruno impacted by aircraft noise.

HS-40 Prohibit new residential development within the 70+ Airport CNEL areas, as dictated by Airport Land Use Commission infill criteria.

HS-42 Require new residential development within the 65 dBA CNEL SFO noise contour to submit an avigation easement to the airport. Specific avigation easement requirements shall be consistent with the County of San Mateo Comprehensive Airport-Land Use Compatibility Plan for SFO.
2023-2031 Housing Element Update 143 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Ordinance 1284
Adopted in June 1977, this ordinance limits building heights to 50 feet or three stories unless approved by City voters and prohibits increases of residential densities in areas zoned residential as of 1974.

Policies Description
HS-48 Work together with other affected cities, the Airport Land Use Commission, and San Mateo County to achieve further reduction of SFO airport-generated noise and safety concerns.

HS-49 Require all new development to comply with FAR Part 77 and San Mateo County CALUP height restriction and safety compatibility standards, in accordance with Airport Land Use Commission guidelines.

HS-50 Actively and aggressively participate in forums and discussions regarding operations and expansion plans for San Francisco International Airport. Seek local representation on task forces, commissions, and advisory boards established to guide airport policies and programs.

HS-51 Require all new development to comply with FAR Part 77 height restriction standards, in accordance with Airport Land Use Commission guidelines.

PFS-F Provide adequate public safety services for all San Bruno properties – including police protection, fire suppression, emergency medical care, and emergency management.

PFS-26 Ensure adequate staffing and facilities for the City’s Police and Fire departments to achieve desired levels of service, particularly surrounding transit areas and along urbaninterface hazard areas.

PFS-30 Require installation and maintenance of fire protection measures in high-risk and urbaninterface areas:
• Proper siting and access;
• Brush clearance (non-fire resistant landscaping 50 feet from structures); • Use of fire resistive materials (pressure-impregnated, fire resistive shingles or shakes);
• Landscaping with fire resistive species; and
• Installation of early warning systems (alarms and sprinklers).

PFS-31 Ensure adequate fire water pressure as a condition of approval for all new development projects.

PFS-32 Require installation of residential sprinklers in areas with steep slopes and/or diminished access.

PFS-35 Require installation of automatic sprinkler systems in all hotel, motel, and other overnight lodging facilities, in mixed commercial/residential uses, and in apartment buildings of three or more units.

PFS-39 Minimize risks to single-access residential neighborhoods by providing alternative access for fire and other emergency personnel.
2023-2031 Housing Element Update 144 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Ordinance 1446
Adopted in November 1984, Ordinance 1446 gives “the City of San Bruno the authority to approve the enlargement or extension of existing buildings and the construction of new buildings and structures in the Tanforan Park Shopping Center without further voter approval; provided that the height of any such building or structure shall not exceed the height of the tallest building or structure existing at the time of adoption of the ordinance”. The highest structure existing at the time of adoption was the Target building, which is at an elevation of 126 feet and 9 inches AMSL. If any proposed building height exceeds the current allowance, such proposal would require City Council to place such request on a future ballot measure.

Bayhill Specific Plan
As noted in Section 3.1.1.1, Housing Opportunity Sites 3 and 13 are located within the Bayhill Specific Plan area. Chapter Six of the Bayhill Specific Plan includes mandatory “Environmental Quality” policies, including the following which pertain to hazards and hazardous materials.

Policy 6-7
Policy 6-7 requires new development with hazardous materials on site to create digital pre-incident plans. These plans shall be distributed to the San Bruno Fire Department as a condition of approval of a development entitlement prior to the issuance of a certificate of occupancy for the project site.

Policy 6-8
Policy 6-8 requires any dewatering conducted during construction to be subject to review and approval by the County of San Mateo’s Groundwater Protection Program.

4.9.1.2 Existing Conditions
General Plan and Municipal Code Conforming Sites
Residential development at the densities proposed by the Housing Element Update (refer to Table 3.2 1) are allowed at Housing Opportunity Sites 6, 8, 10, 16, 18, and 19 under their existing General Plan land use designation and zoning designation, and therefore no General Plan amendments or rezoning is required. The existing conditions at these sites related to hazards and hazardous materials are discussed below.

Housing Opportunity Site 6
Housing Opportunity Site 6 is currently developed with multiple uses, including a privately operated golf driving range, parking lot storage for a private bus operator, and a maintenance building for the San Bruno Park School District. Site 6 is not on the Cortese List.86 The nearest school is the Crestmoor Canyon Stratford School, located 0.18-miles south of Site 6. The nearest airport, SFO, is located approximately 2.05 miles east of Site 6, which is beyond the outer boundary of safety compatibility zones and CNEL noise contours established in the ALUCP. Critical aeronautical 86 California Environmental Protection Agency. “Cortese List Data Resources.” Accessed October 24, 2022. https://calepa.ca.gov/sitecleanup/corteselist/.
2023-2031 Housing Element Update 145 Initial Study
City of San Bruno December 2022 (Revised January 2023)
surfaces at Site 6 are 150 feet above ground level (AGL) or greater. As shown on Figure 4.20-1, Site 6 is located within a Wildland Fire Hazard Area.

Housing Opportunity Site 8
Housing Opportunity Site 8 is currently developed with the former Edgemont Elementary School campus. Site 8 is not on the Cortese List.87 The nearest school is Allen Elementary, located approximately 0.05-miles north of Site 8. SFO is located approximately 1.10-miles east of Site 8, which is located beyond the outer boundary of safety compatibility zones and CNEL noise contours established in the ALUCP. Critical aeronautical surfaces at Site 8 are 150 feet AGL or greater. As shown on Figure 4.20-1, Site 8 is not located within a Wildland Fire Hazard Area or Wildland/Urban Interface Area.

Housing Opportunity Sites 10 and 16
Housing Opportunity Sites 10 and 16 are vacant dirt lots that are located adjacent to each other on San Marco Avenue. Sites 10 and 16 are not on the Cortese List. 88 The nearest school is the City Park
Stratford School located 0.3-miles west of Sites 10 and 16. SFO is located approximately one mile northeast of Sites 10 and 16, which are located beyond the outer boundary of safety compatibility zones and CNEL noise contours established in the ALUCP. Critical aeronautical surfaces at Sites 10 and 16 are 100 feet AGL or greater. As shown on Figure 4.20-1, Sites 10 and 16 are not located within a Wildland Fire Hazard Area or Wildland/Urban Interface Area.

Housing Opportunity Site 18
Housing Opportunity Site 18 is developed with a two-story office building, pedestrian plaza, and surface parking lot. Site 18 is not on the Cortese List. 89 The nearest school is the El Portal Special
Education School, located approximately 0.3-miles west of Site 18. SFO is located approximately

1.3-miles east of Site 18, which is located beyond the outer boundary of the safety compatibility zones established in the ALUCP, but within the 65-70 dB CNEL noise contour. Critical aeronautical surfaces at Site 18 are 65 feet AGL or greater. As shown on Figure 4.20-1, Site 18 is not located within a Wildland Fire Hazard Area or Wildland/Urban Interface Area.

Housing Opportunity Site 19
Housing Opportunity Site 19 is developed with a single-story pet hospital and surface parking lot.

Site 19 is not on the Cortese List.90 The nearest school is the El Portal Special Education School, located approximately 0.3-miles west of Site 19. SFO is located approximately 1.10-miles east of Site 19, which is located beyond the outer boundary of the safety compatibility zones established in the ALUCP, but within the 70-75 dB CNEL noise contour. Critical aeronautical surfaces at Site 19 are 65 feet AGL or greater. As shown on Figure 4.20-1, Site 19 is not located within a Wildland Fire Hazard Area or Wildland/Urban Interface Area.
87 California Environmental Protection Agency. “Cortese List Data Resources.” Accessed October 24, 2022. https://calepa.ca.gov/sitecleanup/corteselist/. 88 Ibid. 89 Ibid. 90 Ibid. 2023-2031 Housing Element Update 146 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Transit Corridors Plan Area Sites
As noted in Section 3.1.1.1, Housing Opportunity Sites 1, 2, 4, 5, 7, 9, 11, 12, 15, 17, 20, 21, 22, and 23 are located within the TCP area. The TCP EIR identified a total of 26 sites that were on the Cortese List, including Housing Opportunity Sites 11, 12, 15, and 23. Since the certification of the TCP EIR in 2012, none of the other Housing Opportunity Sites located within the TCP have been added to the Cortese List.

The eastern boundary of the TCP area is located approximately 0.5-miles west of SFO;. Sites 7 and 20 are located in the 65-70 dB CNEL noise contour but outside of any safety compatibility zones.

Sites 15 and 21 are located within the 65-70 dB noise contour and Safety Compatibility Zone 3. Aall of the remaining Housing Opportunity Sites located within the TCP are located beyond the outer boundary of safety compatibility zones and CNEL noise contours established in the ALUCP. Critical aeronautical surfaces in the TCP area are 100 feet AGL in height or greater.

As shown on Figure 4.20-1, none of the TCP Housing Opportunity Sites are located within a Wildland Fire Hazard Area or a Wildland/Urban Interface Area.

Bayhill Specific Plan Area Sites
As noted in Section 3.1.1.2, Housing Opportunity Sites 3 and 13 are located within the Bayhill Specific Plan area. Sites 3 and 13 are not on the Cortese List.

The eastern boundary of the Bayhill Specific Plan area is located approximately 1.3-miles west of SFO; Sites 3 and 13 are located beyond the outer boundary of safety compatibility zones and CNEL noise contours established in the ALUCP. Critical aeronautical surfaces at Sites 3 and 13 are 150 feet AGL in height or greater.

As shown on Figure 4.20-1, a small portion of Site 3 is within a Wildland/Urban Interface Area, while Site 13 is not located within a Wildland Fire Hazard Area or a Wildland/Urban Interface Area.

Housing Opportunity Site 14
Housing Opportunity Site 14 consists of 1122-1188 El Camino Real/300 Tanforan Shopping Center, which is developed with the Shops at Tanforan shopping mall, and 1292 Huntington Avenue, which is located opposite the Shops at Tanforan across the Sneath Lane/Huntington Avenue intersection and is developed with a vacant paved lot. The original Shops at Tanforan development was originally constructed in 1971; it underwent major renovations in 2005 and the Century Theatre and associated parking lot were added in 2007. The original Shops at Tanforan Development included a variety of retail uses, including a Sears department store and the associated Sears Automotive Center, which were located in the northeast corner of the site to the west of the existing Century Theatre building. 1292 Huntington Avenue has historically been undeveloped.

Historically, Site 14 was used for horse raising and grazing since the early days of the Spanish occupation on the Peninsula. Tanforan Racetrack, which opened in 1899, was the takeoff site of the first flight ever on the West Coast. Tanforan was also the site of the first ever aircraft carrier takeoff and landing in 1911, from the U.S.S. Pennsylvania. The Tanforan Racetrack held races of all types, 2023-2031 Housing Element Update 147 Initial Study
City of San Bruno December 2022 (Revised January 2023)
from horse races to races between cars and airplanes, before it burned down in 1964. In 1965, the site was used as a golf course.

The northeast corner of Site 14 (see Figure 4.9-1) where the former Sears Automotive Center operated is on the List of Leaking Underground Storage Tank (LUST) Sites, which is one of the lists compiled pursuant to Government Code Section 65962.5.91 Subsurface soil, soil vapor, and groundwater investigations identified soil and soil vapor contaminated within benzene, and groundwater contaminated with light non-aqueous phase liquids (LNAPL).92 The primary sources of contamination (underground petroleum storage tanks) were removed in 1985 and 2001; a secondary source of petroleum hydrocarbons was discovered between the San Bruno Police Department building at 1177 Huntington Avenue and the Century Theatre building. This secondary source was remediated between August 2019 and September 2019.93
Site 14’s listing is classified as “Open – Verification Monitoring”, and a monitoring and sampling program is ongoing to confirm successful completion of site cleanup. As of December 2019, no LNAPLs or sheen has been observed in any of the monitoring wells on-site, and benzene levels have been reduced below the San Mateo County Department of Environmental Health (SMCEHS) target low-threat closure criteria of 1,000 µg/L. Destruction of all remaining monitoring wells and disposal of investigation derived waste, followed by case closure, is expected by December 2023. Future development within the area shown in Figure 4.9-1 would be required to submit a Redevelopment Management Plan that includes 1) an evaluation of whether redevelopment activities will create new exposure pathways to human health and the environment that pose unacceptable risks, and, if so, how those risks will be mitigated, and 2) a discussion of how contaminated media will be handled and disposed during construction activities.94
Site 14 is located 1.10-miles northwest of the runway termination point of SFO, which places Site 14 within the 70-75 dB CNEL noise contour and Safety Compatibility Zone 4. The critical aeronautical surfaces at Site 14 are between 55 to 90 feet AGL, equivalent to 125 to 145 feet AMSL. The nearest school is the El Portal Special Education School, located approximately 0.35-miles west of Site 14.

As shown on Figure 4.20-1, a portion of Site 14 is located within a Wildland/Urban Interface Area. 91 California Environmental Protection Agency. “Cortese List Data Resources.” Accessed October 24, 2022. https://calepa.ca.gov/sitecleanup/corteselist/. 92 Nonaqueous phase liquids (NAPLs) are hydrocarbons that exist as a separate, immiscible phase when in contact with water and/or air. Light nonaqueous phase liquids (LNAPLs) have densities less than that of water. LNAPLs represent potential long-term sources for continued ground-water contamination at many sites. Source: United States Environmental Protection Agency. Light Nonaqueous Phase Liquids. June 2015. 93 AECOM. Corrective Plan Implementation Report. April 2020. 94 Gwinn, Brian. Hazardous Materials Specialist, Groundwater Protection Program, San Mateo County Environmental Health Services Department. Email communication dated September 8, 2022.

Source: AECOM, April 2017.

N
Site
Location
6HDUV$XWRPRWLYH
&HQWHU6LWH
SEARS AUTOMOTIVE CENTER SITE FIGURE 4.9-1
2023-2031 Housing Element Update
City of San Bruno
148 Initial Study
December 2022 (Revised January 2023)
2023-2031 Housing Element Update 149 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.9.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant with
Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Create a significant hazard to the public or the
environment through the routine transport, use,
or disposal of hazardous materials?
2) Create a significant hazard to the public or the
environment through reasonably foreseeable
upset and accident conditions involving the
release of hazardous materials into the
environment?
3) Emit hazardous emissions or handle hazardous
or acutely hazardous materials, substances, or
waste within one-quarter mile of an existing or
proposed school?
4) Be located on a site which is included on a list
of hazardous materials sites compiled pursuant
to Government Code Section 65962.5 and, as
a result, would it create a significant hazard to
the public or the environment?
5) For a project located within an airport land use
plan or, where such a plan has not been
adopted, within two miles of a public airport
or public use airport, result in a safety hazard
or excessive noise for people residing or
working in the project area?
6) Impair implementation of or physically
interfere with an adopted emergency response
plan or emergency evacuation plan?
7) Expose people or structures, either directly or
indirectly, to a significant risk of loss, injury,
or death involving wildland fires?
Impact HAZ-1: The project would not create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials. (Less than Significant Impact)
Construction of future development under the Housing Element Update would involve the routine transport, use, and disposal of hazardous materials such as fuel, solvents, paints, oils, grease, and caulking. Such transport, use, and disposal must be compliant with the RCRA, U.S. Department of Transportation hazardous materials regulations, and Cal/OSHA regulations. In addition, the San Bruno General Plan contains several policies (refer to Section 4.9.1.2) that ensure hazardous materials are appropriately transported, used, and disposed of. Therefore, the transport, use, or 2023-2031 Housing Element Update 150 Initial Study
City of San Bruno December 2022 (Revised January 2023)
disposal of hazardous materials during future construction activities would not create a significant hazard to the public or the environment.

Operation and maintenance of residential uses do not involve the use of acutely hazardous materials.

Potentially hazardous materials, including cleaning supplies, maintenance chemicals, and herbicides and pesticides for landscape maintenance, can be expected to be used by future residential development at the Housing Opportunity Sites. The transport, use, and disposal of these materials would be subject to the federal, state, and local laws and regulations identified above. Future residential development may include emergency diesel generators to be used in case of emergency; under Health and Safety Code 25507(a)(1)(A), the project would be required to establish and implement a Hazardous Materials Business Plan if the amount of diesel fuel stored on-site exceeds 55 gallons. Adherence with the aforementioned existing laws and regulations would ensure that the routine transport, use, or disposal of hazardous materials by future development under the Housing Element Update would not create a significant hazard to the public or the environment.

Impact HAZ-2: The project would not create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment. (Less than Significant Impact with Mitigation Incorporated)
Demolition
Based on the age of many of the existing buildings located on the Housing Opportunity Sites, hazardous materials such as ACMs, lead-based paint, and PCBs may be present in building materials.

General Plan Policy HS-28 requires lead-based paint and asbestos surveys be conducted prior to building demolition, and General Plan Policy HS-29 requires the abatement of all lead-based paint and asbestos prior to building demolition. Abatement activities would be conducted in accordance with Section 19827.5 of the California Health and Safety Code, BAAQMD regulations (specifically Regulation 11, Rule 2, Hazardous Materials; Asbestos Demolition, Renovation and Manufacturing) and Cal/OSHA requirements. Provision C.12.f of the NPDES MRP requires screening for the presence of PCBs prior to the demolition of any buildings constructed between 1955 and 1980.

Accordingly, all lead-based paint, ACMs, and PCBs present in building materials at Site 14 would be identified and disposed of in accordance with the TSCA and General Plan policies HS-24, thus ensuring that demolition of existing buildings at the Housing Opportunity Sites does not create a significant hazard to the public or environment through the release of ACMs, lead-based paint, and PCBs. (Less than Significant Impact)
Soil Contamination
General Plan and Municipal Code Conforming Sites
As documented in Section 4.9.1.2, there is no known soil contamination at Housing Opportunity Sites 6, 8, 10, 16, 18, or 19, and none of these sites are on the Cortese List. None of the existing uses at these sites are known sources of soil contamination. However, it is possible that soil contamination associated with past uses of these sites exists. If contaminated soil is present at these sites, grounddisturbing activities could expose construction workers and the public to health hazards from physical contact with contaminated materials or hazardous vapors. Improper handling or storage of 2023-2031 Housing Element Update 151 Initial Study
City of San Bruno December 2022 (Revised January 2023)
contaminated soil and groundwater can further expose the public to these hazards, or potentially spread contamination through surface water runoff or air-borne dust. In addition, contaminated groundwater can spread downgradient, potentially contaminating subsurface areas of surrounding properties.

Mitigation Measures:

MM HAZ-2.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Sites 6, 8, 10, 16, 18, and 19 to comply with the following measure:
a. The City shall require a Phase I Environmental Site Assessment (Phase I ESA) prior to issuance of any discretionary permits that would allow ground-disturbing activities, with a Phase II ESA also required if the Phase I ESA indicates evidence of potential site contamination. The City shall also require compliance with the site assessment(s) and any remediation, removal, and disposal requirements for soil, surface water, and/or groundwater contamination enforced by the Department of Toxic Substances Control (DTSC), Regional Water Quality Control Board (RWQCB), San Mateo County Department of Environmental Health (SMCEHS), California Division of Occupational Safety and Health (CalOSHA), U.S. Environmental Protection Agency (EPA), and other
jurisdictional agencies.

Adherence with MM HAZ-2.1 during construction of future development at Housing Opportunity Sites 6, 8, 10, 16, 18, and 19 would ensure that any contaminated soil present at these sites is identified and remediated in accordance with federal, state, and local regulations and requirements imposed by the DTSC, RWQCB, SMCEHS, CalOSHA, and the EPA. Therefore, future development of Housing Opportunity Sites 6, 8, 10, 16, 18, and 19 would not create a significant hazard to the public or the environment. (Less than Significant Impact with Mitigation Incorporated) Transit Corridors Plan Area Sites
As documented in Section 4.9.1.2, the TCP EIR identified a total of 26 sites in the TCP area that were on the Cortese List, including Housing Opportunity Sites 11, 12, 15, and 23. Since the certification of the TCP EIR in 2012, none of the other Housing Opportunity Sites located within the TCP have been added to the Cortese List. The TCP EIR imposed the following mitigation measure to ensure that future development within the TCP area, including at Sites 1, 2, 4, 5, 7, 9, 11, 12, 15, 17, 20, 21, 22, and 23, would not create a significant hazard to the public or the environment. • TCP Mitigation Measure 8-1: California Department of Toxic Substances Control (DTSC) remedial investigations and actions have occurred or are ongoing on the remaining 11 active sites and 15 closed sites (in some cases, a hazardous materials site closure notice may contain land use restrictions limiting future use of the site as a result of residual contamination that may exist). Development involving disturbance or re-use of one of these 26 sites cannot proceed until required remediation actions have been completed to DTSC satisfaction. The 2023-2031 Housing Element Update 152 Initial Study
City of San Bruno December 2022 (Revised January 2023)
DTSC may impose land use restrictions, which prevent the use of the property for residential, school, hospital, or day care purposes, on some sites, if warranted. In connection with each discretionary development approval application that the City initially determines could expose construction workers or occupants to hazardous materials contamination related to one of these sites, the City shall require a Phase I environmental site assessment (Phase I ESA) prior to property development, with a Phase II ESA also required if the Phase I ESA indicates evidence of potential site contamination. The City shall also require compliance with the site assessment, remediation, removal, and disposal requirements for soil, surface water, and/or groundwater contamination enforced by the DTSC, Regional Water Quality Control Board (RWQCB), San Mateo County Department of Environmental Health, California Division of Occupational Safety and Health (CalOSHA), U.S. Environmental Protection Agency (EPA), and other jurisdictional agencies.

Consistent with the conclusions of the TCP EIR, adherence with TCP Mitigation Measure 8-1 as required by the TCP EIR would ensure future development under the Housing Element Update at Sites 1, 2, 4, 5, 7, 9, 11, 12, 15, 17, 20, 21, 22, and 23, would not create a significant hazard to the public or the environment. (Less than Significant Impact) Bayhill Specific Plan Area Sites
As documented in Section 4.9.1.2, there is no known soil contamination at Sites 3 and 13, and neither site is on the Cortese List. Future development at Sites 3 and 13 would be required by the General Plan and Specific Plan policies to remove and remediate any contaminated soil encountered during ground-disturbing activities at an approved disposal facility in accordance with federal, state, and local regulatory requirements. Consistent with the conclusions of the Bayhill Specific Plan EIR, adherence with federal, state, and local regulations (refer to Section 4.9.1.1) would ensure that future development of Sites 3 and 13 under the Housing Element Update would not create a significant hazard to the public or the environment. (Less than Significant Impact) Housing Opportunity Site 14
As discussed in Section 4.9.1.2, subsurface soil, soil vapor, and groundwater beneath the northeast corner of Site 14 (refer to Figure 4.9-1) is contaminated with benzene and LNAPLs below SMCEHS thresholds. Per the SMCEHS, remediation has been completed pending the conclusion of a sampling and monitoring program, and destruction of all remaining monitoring wells and disposal of investigation derived waste, followed by case closure, is expected by December 2023. Prior to future development within the area shown in Figure 4.9-1, the SMCEHS would require the project proponent to submit a Redevelopment Management Plan that includes 1) an evaluation of whether redevelopment activities will create new exposure pathways to human health and the environment that pose unacceptable risks, and, if so, how those risks will be mitigated, and 2) a discussion of how contaminated media will be handled and disposed during construction activities.95 Accordingly, redevelopment of this portion of Site 14 would not create a significant hazard to the public or the environment.
95 Gwinn, Brian. Hazardous Materials Specialist, Groundwater Protection Program, San Mateo County Environmental Health Services Department. Email communication dated September 8, 2022. 2023-2031 Housing Element Update 153 Initial Study
City of San Bruno December 2022 (Revised January 2023)
The remainder of Site 14 may be contaminated with chemicals used in landscape maintenance and by petroleum hydrocarbons associated with the past use of the site by vehicles and aircraft. Additionally, there may be historic or existing dry-cleaning operations that were or are located in the surrounding area that could have resulted in subsurface contamination of Site 14 with dry cleaning chemicals, such as the chlorinated solvents perchloroethylene (PCE) and trichloroethene (TCE). Contaminated soil, soil vapor, and groundwater encountered and/or disturbed during construction could adversely affect construction workers and nearby sensitive receptors, if appropriate control measures are not implemented.

Mitigation Measures:

MM HAZ-2.2: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Site 14 to comply with the following measures:
a. Prior to the issuance of any discretionary permits that would allow ground-disturbing activities on Site 14 (outside of the area shown on Figure 4.9-1), the project proponent shall obtain a Phase I Environmental Site Assessment (ESA). The Phase I ESA shall be conducted in accordance with the United States Environmental Protection Agency’s All Appropriate Inquiries (AAI) Rule and the latest American Society for Testing and Materials (ASTM International) guidelines, and identify all potential subsurface contaminants warranting further investigation. b. If the Phase I ESA identifies any potential contaminants warranting further investigation, a Phase II ESA shall be prepared in accordance with the United States Environmental Protection Agency’s AAI Rule and the latest ASTM International guidelines. As part of the Phase II, a qualified environmental professional (as defined in Title 40 of the California Code of Regulations) shall take soil, soil vapor, and groundwater samples as determined necessary by the environmental professional in the area of proposed disturbance at 0.5 feet below ground surface (bgs) to the maximum proposed depth of disturbance. Collected soil samples shall be tested for all potential contaminants identified in the Phase I ESA to determine if contaminants exceed California Division of Occupational Safety and Health (Cal/OSHA) exposure limits or San Mateo County Environmental Health Services (SMCEHS) environmental screening levels for residential uses.
c. The results of the Phase II ESA shall be provided SMCEHS department.

If determined necessary by the SMCEHS, a Redevelopment Management Plan (RMP) or equivalent shall be prepared and submitted to the SMCEHS and the Director of Community and Economic Development or the Director’s designee that includes 1) an evaluation of whether redevelopment activities will create new exposure pathways to human health and the environment that pose unacceptable risks, and, if so, how those risks will be mitigated, and 2) a discussion of how contaminated media will be handled and disposed during construction activities. Once 2023-2031 Housing Element Update 154 Initial Study
City of San Bruno December 2022 (Revised January 2023)
approved by the SMCEHS and Community and Economic Development Department, the RMP or equivalent shall be implemented by a qualified environmental professional. The results of the RMP or equivalent shall be submitted to the SMCEHS and the Director of Community and Economic Development or the Director’s designee prior to the issuance of any issuance of any discretionary permits (e.g., grading, construction, occupancy, whichever occurs first).

Implementation of MM HAZ-2.2a would require the preparation of a Phase I ESA that identifies all potential subsurface contaminants which could create a significant hazard to the public (i.e., construction workers, future residents, adjacent receptors) or the environment. Implementation of MM HAZ-2.2b and MM HAZ-2.2c would ensure that the lateral and vertical extents of any existing subsurface contamination are defined and remediated to the satisfaction of the SMCEHS, which is the CUPA for San Mateo County (refer to the discussion in Section 4.9.1.1). Accordingly, implementation of the Housing Element as amended by MM HAZ-2.2 would ensure that future residential development at Site 14 would not create a significant hazard to the public or the environment. (Less than Significant Impact with Mitigation Incorporated) Impact HAZ-3: The project would not emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school. (Less than Significant Impact with Mitigation Incorporated)
A number of the Housing Opportunity Sites are located within a quarter-mile of school facilities.

Residential uses do not emit hazardous emissions. As discussed under Impact HAZ-1, hazardous materials used during construction and operation would be transported, used, and disposed of in accordance with the RCRA, U.S. Department of Transportation hazardous materials regulations, Cal/OSHA regulations, and the City’s General Plan (refer to Section 4.9.1.1). All diesel fuel stored at the Housing Opportunity Sites would be managed in accordance with Health and Safety Code 25507(a)(1)(A). Further, as discussed under Impact HAZ-2, adherence with federal, state and local regulations and mitigation measures MM HAZ-2.1 and HAZ-2.2 would ensure that future development does not create a significant hazard to the public or the environment. For these reasons, future development under the Housing Element Update would not emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school.
2023-2031 Housing Element Update 155 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact HAZ-4: The project would not be located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code Section 65962.5 and, as a result, create a significant hazard to the public or the environment. (Less than Significant Impact with Mitigation Incorporated) As documented in Section 4.9.1.2, Housing Opportunity Sites 11, 12, 14, 15, and 23 are on the Cortese List. Per the discussion under Impact HAZ-2, redevelopment of these sites would not create a significant hazard to the public or environment with implementation of MM HAZ-2.2 and adherence to TCP Mitigation Measure 8-1. Implementation of the aforementioned mitigation measures would ensure that future development of these sites under the Housing Element Update would not create a significant hazard to the public or environment.

Impact HAZ-5: The project would be located within an airport land use plan. The project would not result in a safety hazard or excessive noise for people residing or working in the project area. (Less than Significant Impact with Mitigation Incorporated)
As discussed in Section 2.5.3 City/County Association of Governments of San Mateo County, Section 4.11 Land Use and Planning under Impact LU-2, and Section 4.13 Noise and Vibration under Impact NOI-3, residential uses at all of the Housing Opportunity Sites (with the exception of Sites 14 and 19) are compatible with the noise contours identified in the ALUCP. Residential uses at all of the Housing Opportunity Sites are compatible with the safety compatibility zones identified in the ALUCP. Existing height restrictions of 50 feet (maximum of 90 feet for sites located in the TCP area) for future development on the Housing Opportunity Sites (with the exception of Site 14, which has a height restriction of 126 feet and nine inches AMSL pursuant to Ordinance 1446) would ensure building heights would not exceed critical aeronautical surfaces.

As documented in Section 4.9.1.2, Housing Opportunity Sites 14 and 19 are located within the 70-75 dB CNEL noise contour. As discussed in Section 4.13.2 under Impact NOI-3, the Noise and Vibration Assessment (refer to Appendix B) concluded that reducing interior noise levels to 45 dBA (as required by the California Building Standards Code, San Bruno General Plan, and ALUCP) in future residential development at Sites 14 and 19 is feasible using readily available building techniques. Future residential development at Sites 14 and 19 would be required by General Plan Policy HS-35 to comply with relevant noise insulation standards to achieve an indoor noise level of 45 dB CNEL or less. Although Sites 14 and 19 are located within a 70-75 dB CNEL contour and would require a Local Agency Override of the ALUCP (refer to the discussion in Section 2.5.3), redevelopment of Sites 14 and 19 with residential uses that comply with the 45 dB noise insulation requirements would not result in excessive noise exposure for future residents of Sites 14 and 19.

The critical aeronautical surfaces at Site 14 range between 55 to 90 feet AGL, equivalent to 125 to 145 feet AMSL. Building heights at Site 14 are limited to 126 feet, nine inches AMSL by Ordinance 1446 (refer to Section 4.9.1.1). Because the 2023-2031 Housing Element is a policy document and not a specific development proposal, the airspace compatibility policies of the ALUCP do not directly apply. However, future building heights at the Housing Opportunity Sites (including Site 14) would be required to comply with SFO Policy AP-3, which states that building heights must be the 2023-2031 Housing Element Update 156 Initial Study
City of San Bruno December 2022 (Revised January 2023)
“lower of (1) the height shown on the SFO critical aeronautical surfaces map (Exhibits IV-17 and IV18), or (2) the maximum height determined not to be a “hazard to air navigation” by the FAA in an aeronautical study prepared pursuant to the filing of Form 7460-1.” The use of construction equipment (such as building cranes) or the construction of buildings with heights in excess of 55 feet AGL could pose a safety hazard to construction workers and future residents.

Mitigation Measures:

MM HAZ-5.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Site 14 to comply with the following measures:
a. Prior to the issuance of any construction or building permits, the applicant shall submit a plan with a list of equipment to be used during construction that includes their height and proposed area of operation to the Director of Community and Economic Development or the Director’s designee. The use of equipment in locations where it would penetrate critical aeronautical surfaces shall be expressly prohibited by any construction or building permits issued. The plan sets shall include a page depicting the critical aeronautical surfaces on-site, a list of all equipment with heights of 55 feet or greater and their respective heights, and informs construction workers that the use of equipment with heights that would penetrate critical aeronautical surfaces is prohibited.
b. Future development at Housing Opportunity Site 14 shall comply with Policy AP-3 of the Comprehensive Airport Land Use Compatibility Plan for the Environs of San Francisco International Airport (ALUCP).

Buildings with heights in excess of the applicable critical aeronautical surface as shown in Exhibit IV-17 at Housing Opportunity Site 14 shall be prohibited unless the Federal Aviation Administration determines the proposed building height is not a hazard to air navigation in an aeronautical study prepared pursuant to the filing of Form 7460-1. Proof of compliance with Policy AP-3 of the ALUCP shall be provided to the Director of Community and Economic Development or the Director’s designee prior to issuance of any construction or building permits.

MM HAZ-5.1a would ensure that no construction or building permits are issued that would allow the use of construction equipment on Site 14 that could penetrate critical aeronautical surfaces, and that construction workers are informed on where the use of equipment with heights of 55 feet or greater is prohibited. Adherence with MM HAZ-5.1b would ensure no buildings are constructed that exceed critical aeronautical surfaces or would result in a hazard to air navigation according to the FAA.

Accordingly, implementation of the Housing Element as amended by MM HAZ-5.1 would ensure that future residential development at Site 14 would not result in a safety hazard for future workers or residents within the project area.
2023-2031 Housing Element Update 157 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact HAZ-6: The project would not impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan. (Less than Significant Impact)
The City of San Bruno is within the San Mateo County Emergency Operations Plan area. Under the Emergency Operations Plan, cities are responsible for responding to emergencies within their jurisdiction. As discussed in Section 4.15 Public Services under Impact PS-1 and Impact PS-2, future residential development under the Housing Element Update would pay development impact fees that would contribute to funding the construction of new and expanded fire and police facilities to help the City’s fire and police departments maintain and/or achieve their respective performance objectives. Further, during an emergency, the City would be able to request additional aid from the San Mateo County Emergency Operation Center, including additional personnel and equipment.

Accordingly, future development under the Housing Element Update would not impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan.

Impact HAZ-7: The project would not expose people or structures, either directly or indirectly, to a significant risk of loss, injury, or death involving wildland fires. (Less than Significant Impact)
As shown on Figure 4.20-1, Site 6 is located within a Wildland Fire Hazard Area, and Sites 3 and 14 are bordered by a Wildland/Urban Interface Area. Adherence with General Plan Policy PFS-30 would require future development at Sites 3, 6, and 14 to install and maintain a variety of fire protection measures, and all construction would be required by the City’s Municipal Code to be built to 2019 California and International Fire Code standards with fire suppression systems. Further, as discussed in Section 4.15 under Impact PS-1, fire protection services are adequate to meet new demand generated by redevelopment of Sites 3, 6, and 14. For these reasons, future development under the Housing Element Update would not expose people or structures, either directly or indirectly, to a significant risk of loss, injury, or death involving wildland fires. 2023-2031 Housing Element Update 158 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.10 HYDROLOGY AND WATER QUALITY

4.10.1 Environmental Setting

4.10.1.1 Regulatory Framework
Federal and State
The federal Clean Water Act and California’s Porter-Cologne Water Quality Control Act are the primary laws related to water quality in California. Regulations set forth by the Environmental Protection Agency (EPA) and the State Water Resources Control Board (SWRCB) have been developed to fulfill the requirements of this legislation. EPA regulations include the National Pollutant Discharge Elimination System (NPDES) permit program, which controls sources that discharge pollutants into the waters of the United States (e.g., streams, lakes, bays, etc.). These regulations are implemented at the regional level by the Regional Water Quality Control Boards (RWQCBs). The project site is within the jurisdiction of the San Francisco Bay RWQCB.

Under Section 303(d) of the federal Clean Water Act, the SWRCB and RWQCBs are required to identify impaired surface water bodies that do not meet water quality standards and develop total maximum daily loads (TMDLs) for contaminants of concern. The list of the state’s identified impaired surface water bodies, known as the “303(d) list” can be found on the on the RWQCB’s website.96
National Flood Insurance Program
The Federal Emergency Management Agency (FEMA) established the National Flood Insurance Program (NFIP) to reduce impacts of flooding on private and public properties. The program provides subsidized flood insurance to communities that comply with FEMA regulations protecting development in floodplains. As part of the program, FEMA publishes Flood Insurance Rate Maps (FIRMs) that identify Special Flood Hazard Areas (SFHAs). An SFHA is an area that would be inundated by the one-percent annual chance flood, which is also referred to as the base flood or 100- year flood.

Statewide Construction General Permit
The SWRCB has implemented an NPDES General Construction Permit for the State of California (Construction General Permit). For projects disturbing one acre or more of soil, a Notice of Intent (NOI) must be filed with the RWQCB by the project sponsor, and a Storm Water Pollution Prevention Plan (SWPPP) must be prepared by a qualified professional prior to commencement of construction and filed with the RWQCB by the project sponsor. The Construction General Permit includes requirements for training, inspections, record keeping, and, for projects of certain risk levels, monitoring. The general purpose of the requirements is to minimize the discharge of pollutants and to protect beneficial uses and receiving waters from the adverse effects of construction-related storm water discharges.
96 San Francisco Regional Water Quality Control Board. “The 303(d) List of Impaired Water Bodies.” Accessed August 11, 2022. https://www.waterboards.ca.gov/sanfranciscobay/water_issues/programs/TMDLs/303dlist.html. 2023-2031 Housing Element Update 159 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Regional and Local
San Francisco Bay Basin Plan
The San Francisco Bay RWQCB regulates water quality in accordance with the Water Quality Control Plan for the San Francisco Bay Basin (Basin Plan). The Basin Plan lists the beneficial uses that the San Francisco Bay RWQCB has identified for local aquifers, streams, marshes, rivers, and the San Francisco Bay, as well as the water quality objectives and criteria that must be met to protect these uses. The San Francisco Bay RWQCB implements the Basin Plan by issuing and enforcing waste discharge requirements, including permits for nonpoint sources such as the urban runoff discharged by a City’s stormwater drainage system. The Basin Plan also describes watershed management programs and water quality attainment strategies.

Municipal Regional Permit Provision C.3
The San Francisco Bay RWQCB re-issued the Municipal Regional Stormwater NPDES Permit (MRP) in May 2022 to regulate stormwater discharges from municipalities and local agencies (copermittees) in Alameda, Contra Costa, San Mateo, and Santa Clara Counties, and the cities of Fairfield, Suisun City, and Vallejo.97 Under Provision C.3 of the MRP, new and redevelopment projects that create or replace 5,000 square feet or more of impervious surface area are required to implement site design, source control, and Low Impact Development (LID)-based stormwater treatment controls to treat post-construction stormwater runoff. LID-based treatment controls are intended to maintain or restore the site’s natural hydrologic functions, maximizing opportunities for infiltration and evapotranspiration, and using stormwater as a resource (e.g. rainwater harvesting for non-potable uses). The MRP also requires that stormwater treatment measures are properly installed, operated, and maintained.

In addition to water quality controls, the MRP requires new development and redevelopment projects that create or replace one acre or more of impervious surface to manage development-related increases in peak runoff flow, volume, and duration, where such hydromodification is likely to cause increased erosion, silt pollutant generation, or other impacts to local rivers, streams, and creeks.

Projects may be deemed exempt from these requirements if: (1) the post-project impervious surface area is less than, or the same as, the pre-project impervious surface area; (2) the project is located in a catchment that drains to a hardened (e.g., continuously lined with concrete) engineered channel or channels or enclosed pipes, which extend continuously to the Bay, Delta, or flow-controlled reservoir, or, in a catchment that drains to channels that are tidally influenced; or (3) the project is located in a catchment or subwatershed that is highly developed (i.e., that is 70 percent or more impervious).98
97 California Regional Water Quality Control Board San Francisco Region. Municipal Regional Stormwater NPDES Permit, Order No. R2-2022-0018, NPDES Permit No. CAS612008. May 11, 2022 98 The Hydromodification Applicability Maps developed the permittees under Order No. R2-2009-0074 were prepared using this standard, adjusted to 65 percent imperviousness to account for the presence of vegetation on the photographic references used to determine imperviousness. Thus, the maps for Order No. R2-2009-0074 are accepted as meeting the 70 percent requirement.
2023-2031 Housing Element Update 160 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Municipal Regional Permit Provision C.12.f
Provision C.12.f of the MRP requires co-permittee agencies to implement a control program for PCBs that reduces PCB loads by a specified amount during the term of the permit, thereby making substantial progress toward achieving the urban runoff PCBs wasteload allocation in the Basin Plan by March 2030.99 Programs must include focused implementation of PCB control measures, such as source control, treatment control, and pollution prevention strategies. Municipalities throughout the Bay Area are updating their demolition permit processes to incorporate the management of PCBs in demolition building materials to ensure PCBs are not discharged to storm drains during demolition.

Buildings constructed between 1950 and 1980 that are proposed for demolition must be screened for the presence of PCBs prior to the issuance of a demolition permit. Single-family residential and wood frame structures are exempt.

San Mateo Countywide Water Pollution Prevention Program The San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) was established in 1990 to reduce the pollution carried by stormwater into local creeks, San Francisco Bay, and the Pacific Ocean. The program is a partnership of the C/CAG, each incorporated city and town in the county, and the County of San Mateo, which share a common National Pollutant Discharge Elimination System permit. The SMCWPPP includes pollution reduction activities for construction sites, illegal discharges and illicit connections, new development, and municipal operations. The program also includes a target pollutant reduction strategy and monitoring program.

San Mateo County Flood and Sea Level Rise Resiliency Control District The San Mateo County Flood and Sea Level Rise Resiliency District (formerly known as the San Mateo County Flood Control District) provides financing for flood control projects and manages the larger network of pipes, trenches, culverts, detention basins, and open channels throughout the district. There are three active flood control zones within this district: Colma Creek, San Bruno Creek, and San Francisquito Creek. The Colma and San Bruno zones intersect the City of San Bruno.

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating impacts on hydrology and water quality resulting from planned development within the City, including the following:

Policies Description
ERC-A Preserve open space essential for the conservation of San Bruno’s natural resources – including vegetation, wildlife, soils, water, and air.

ERC-D Reduce pollution levels within the surface water that San Bruno discharges into the San Mateo County Flood Control District, then into San Francisco Bay.

ERC-3 Protect natural vegetation in park, open space, and scenic areas as wildlife habitat, to prevent erosion, and to serve as noise and scenic buffers. 99 California Regional Water Quality Control Board San Francisco Region. Municipal Regional Stormwater NPDES Permit, Order No. R2-2022-0018, NPDES Permit No. CAS612008. May 11, 2022 2023-2031 Housing Element Update 161 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
ERC-4 Encourage the use of Best Management Practices in conserving the city’s valuable water supply sources.

ERC-18 Coordinate efforts with the San Mateo County Flood Control District, Caltrans, Golden Gate National Recreation Area, San Francisco Airport, Peninsula Watershed lands, and Junipero Serra County Park to develop or preserve and manage interconnecting wildlife movement corridors.

ERC-19 Regulate new development – specifically industrial uses – as well as construction and demolition practices to minimize pollutant and sediment concentrations in receiving waters and ensure waterbodies within San Bruno and surface water discharged into San Francisco Bay meets or exceeds relevant regulatory water quality standards.

ERC-20 Require implementation of Best Management Practices to reduce accumulation of nonpoint source pollutants in the drainage system originating from streets, parking lots, residential areas, businesses, and industrial operations.

ERC-23 Regulate new development to minimize stormwater runoff rates and volumes generated by impervious surfaces, and maximize recharge of local groundwater aquifers when feasible. Utilize the recommendations provided in the Bay Area Stormwater Management Agency’s Start at the Source Design Guidance Manual for Stormwater Quality Protection.

ERC-24 Require that new development incorporate features into site drainage plans that reduce impermeable surface area and surface runoff volumes. Such features may include:
• Additional landscaped areas including canopy trees and shrubs; • Reducing building footprint;
• Removing curbs and gutters from streets and parking areas where appropriate to allow stormwater sheet flow into vegetated areas;
• Permeable paving and parking area design
• Stormwater detention basins to facilitate infiltration; and • Building integrated or subsurface water retention facilities to capture rainwater for use in landscape irrigation and other non-potable uses.

HS-D Protect sites subject to flooding hazards by implementing storm drainage improvements, and by requiring building design and engineering that meets or exceeds known flood risk requirements.

HS-5 Require preparation of a drainage and erosion control plan for land alteration and vegetation removal on sites greater than 10,000 sq. ft. in size.

HS-16 Design and engineer new or redevelopment projects in potential flood hazard areas (e.g., Belle Air Park) to withstand known flood risk.

HS-18 Require developers to implement erosion and sedimentation control measures to maintain an operational drainage system, preserve drainage capacity, and protect water quality.

HS-20 Retain existing open space areas that serve as detention ponds in order to retain stormwater, recharge aquifers, and prevent flooding.

HS-22 Require that construction-related grading and other activities comply with the Association of Bay Area Governments’ (ABAG) Manual of Standards for Erosion and Sediment Control Measures and with the California Stormwater Quality Association (CASQA), Stormwater Best Management Practice Handbook for Construction. 2023-2031 Housing Element Update 162 Initial Study
City of San Bruno December 2022 (Revised January 2023)
City of San Bruno Urban Runoff Management Policies
Policies related to the management of urban runoff within the City are included in Title 10 of the San Bruno Municipal Code, Municipal Services, and Title 12, Land Use. Best Management Practices as defined in Chapter 10.12, Water Quality Controls, which reduce the presence of pollutants in the stormwater are outlined in Chapter 10.18, Storm Water Management and Discharge Control. 1) No person shall throw, deposit, leave, maintain, keep, or permit to be thrown, deposited, placed, left or maintained, any refuse, rubbish, garbage, or other discarded or abandoned objects, articles, and accumulations, in or upon any street, alley, sidewalk, storm drain inlet, catch basin, conduit or other drainage structure, business place, or upon any public or private lot of land in the city, so that the same might be or become a pollutant, except in containers or in lawfully established dumping grounds.
2) Standard for Parking Lots and Similar Structures. Persons owning or operating a parking lot, gas station pavement or similar structure shall clean those structures as frequently and thoroughly as practicable in a manner that does not result in discharge of pollutants to the city storm sewer system.
3) Best Management Practices for New Developments and Redevelopments. Any construction contractor performing work in the city shall endeavor, whenever possible, to provide filter materials at the catch basin to retain any debris and dirt flowing into the city’s storm sewer system. City may establish controls on the volume and rate of storm water runoff from new developments and redevelopments as may be appropriate to minimize the discharge and transport of pollutants.
4) Compliance with Best Management Practices. Where best management practices guidelines or requirements have been adopted by the city for any activity, operation, or facility which may cause or contribute to storm water pollution or contamination, illicit discharges, and/or discharge of non-storm water to the storm water system, every person undertaking such activity or operation, or owning or operating such facility shall comply with such guidelines or requirements as may be identified by the director of public works. (Ord. 1558 § 1, 1994) Provisions for the minimization of the adverse effects of water runoff are also included in Title 12 “Land Use”, Article I “Excavation and Grading, Chapter 12.12 “Soils and Engineering Geology Report” and 12.16 “Grading Regulations”. As an attached element of the grading plan, Subsection

12.12.050 “Erosion Control” requires an erosion control plan containing:
“Calculations showing estimated surface water runoff on the site and maintenance of non-vegetative erosion control measures. Vegetative control measures shall be in accordance with Association of Bay Area Governments Manual for Surface Runoff Control Measures, pages 1-50 through 1-57, inclusive. (Ord. 1369 § 1, 1981; prior code § 9-1.7(f))” Per Subsection 12.16.030, “Grading progress and inspection”, swales or ditches on terraces shall have a minimum gradient of three percent and shall be paved with reinforced concrete not less than three inches in thickness. They shall have a minimum paved width of five feet. A single run of swale or ditch shall not collect runoff from a tributary area exceeding fifteen thousand square feet (projected) without discharging into a down drain. Sediment basins may also be required by the city 2023-2031 Housing Element Update 163 Initial Study
City of San Bruno December 2022 (Revised January 2023)
engineer to detain runoff and trap sediment during construction until slope erosion planting has been established.

City of San Bruno Storm Drain Master Plan
To identify and address potential flood risks in the City of San Bruno, a Storm Drain Master Plan was adopted by the City in June 2014. In addition to updating the City’s flood control guiding document, the Master Plan defines a new Capital Improvement Program to address the storm drain system’s capacity deficiencies.

Transit Corridors Plan
Various policies in the TCP have been adopted for the purpose of avoiding or mitigating hydrology and water quality impacts resulting from planned development within the TCP area, including the following:

Policies Description
A13-1 Ensure that all projects comply with the Municipal Regional Stormwater Permit as required by the National Pollutant Discharge Elimination System (NPDES) program.

A13-2 Encourage Low Impact Development (LID) techniques to infiltrate, store, detain, evapotranspire, and/or biotreat stormwater runoff close to its source.

A13-3 Minimize impervious surfaces such as concrete, asphalt and hardscaping, especially for surface parking lots. Utilize permeable joint pavers, porous concrete and asphalt, reinforced grass pavement (turfcrete), cobblestone block A13-5 Include project features to reduce pollution at its source including covered trash, recycling, and loading facilities.

A13-6 Utilize landscaping that minimizes irrigation and runoff, promotes surface infiltration where possible, minimizes the use of pesticides and fertilizers, and incorporates appropriate sustainable landscaping practices.

A13-7 Ensure adequate tree canopies in the front setbacks of private development and in parking lots, greenways, parks, and plazas to slow and reduce the amount of rainfall that falls to the ground.

A13-8 Encourage the use of green roofs and water collection devices, such as cisterns and rain barrels, to capture water from the building for re-use.

A13-9 Consider incorporating water collection devices, detention areas, and drain spouts into architectural features, water features, or artwork A13-10 Incorporate any required stormwater treatment measures early in the site planning process to ensure that they will be effective and attractive.

A15-4 Encourage planting strips along the street edges that are designed to act as functional stormwater management systems in the form of “urban bioswales”.

Stormwater is directed into the planter strips to irrigate landscaping while filtering and reducing stormwater runoff.
2023-2031 Housing Element Update 164 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
A6-2 Install naturally drained, landscaped stormwater planters where possible, including on sidewalks, medians, bulbouts, parks and plazas, and traffic circles.

A6-3 Encourage the use of permeable pavers around tree wells instead of impervious materials to increase infiltration of stormwater runoff.

Bayhill Specific Plan
Various policies in the Bayhill Specific Plan have been adopted for the purpose of avoiding or mitigating hydrology and water quality impacts resulting from planned development within the Bayhill Specific Plan area, including the following:

Policies Description
5-15 Minimize Runoff.
a. Require new development to demonstrate no net increase in runoff from development, during both construction and operational phases. b. Applicants proposing new development shall prepare Drainage Report(s) for City’s review and approval prior to issuance of a grading, building, site development or any construction permits. All development, including interim conditions during construction and interim conditions with temporary improvements, within the Project Site is required to address stormwater management and implement stormwater control measures, including but not limited to on-site detention facilities, capture and re-use measures, green roofs, and/or other measures approved by the City, designed to maintain or reduce current, pre-development, surface runoff and stormwater discharge to the public storm drain system.
5-16 Employ Low-Impact Design. Require new development to incorporate low-impact design (LID), such as natural drainage systems and groundwater recharge features, consistent with stormwater permit requirements and the Green Infrastructure Plan.

Utilize LID techniques to infiltrate, store, detain, evapotranspire, and/or bio-treat stormwater runoff close to its source, where feasible.
5-17 Design new private open spaces, plazas, streetscapes, and landscaped areas in the public right-of-way for stormwater management and the efficient use of water. 5-18 Implement trash capture. Require new development to implement trash capture devices on site to reduce trash loads by 100 percent prior to discharging stormwater into the public storm drain system. Require new development to provide trash capture in public stormwater catch basins along the project frontage and any public stormwater catch basins newly installed as part of the development. Cover trash, recycling, and loading areas.
5-19 Utilize sustainable landscaping practices and principles that minimize irrigation and runoff, as well as the use of pesticides and fertilizers 6-8 Protect groundwater supplies from chemical pollution. Developers and property owners shall ensure that any development occurring on parcels where dewatering is needed (anticipated but not limited to parcels 5, 9, 12, 13, 14, or 15, see Figure 2-2) is 2023-2031 Housing Element Update 165 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
subject to review and approval by the County of San Mateo’s Groundwater Protection Program (see also, Policies 6-19 through 6-25).
6-18 Maintain high levels of water quality within the Westside Basin. Developers shall support the water quality of the Westside Basin by utilizing sustainable landscaping practices that minimize irrigation and runoff, promoting surface infiltration, and minimizing use of pesticides and fertilizers, where possible. 6-19 Require groundwater monitoring well installation and sampling prior to dewatering activity.* For any development proposing excavation and dewatering, project proponents shall install groundwater monitoring wells in the public right-of-way or easement and collect and test samples prior to dewatering activity. Wells are to be drilled as deep as the garage depth being proposed.
6-20 Require project proponents to provide estimates of construction dewatering duration, rates, volumes, methods, radius of impact, and disposal plan as part of project consideration and provide updated evaluations during construction. Require that an independent consultant monitor and confirm validity of the estimates during construction after dewatering efforts are underway and site conditions are better understood at a frequency determined by the City. The project shall be phased such that groundwater extractions do not exceed more than 8.5 percent of total designated max pumping volume allocation for the City of San Bruno from the South Westside Basin (i.e., less than 200 AF per year or less than 1,000 AF over 5 years). 6-24 Ensure that dewatering water quality is monitored and the presence of contaminants such as hydrocarbons and VOCs is ascertained. If petroleum hydrocarbons or VOCs are detected in dewatering water obtain a Fuel and VOC General Permit from the RWQCB prior to discharge of dewatering water to the storm drain. 6-32 Require that all applicants proposing to undertake excavation, drilling, or pile-driving activities for new buildings within the Plan Area retain a qualified paleontologist prior to the start of any ground-disturbing activities.
6-33 Require that all applicants undertaking earth moving projects within the Plan Area adequately respond to the discovery of paleontological resources.

4.10.1.2 Existing Conditions
Hydrology and Drainage
San Bruno’s Public Works Department Streets and Stormwater Division operates and maintains the storm drainage system in the City. The City’s existing storm drain network in shown in Figure

4.10-1. The City of San Bruno contains six watersheds that drain the City. The City’s primary drainage basins – San Bruno Creek (Watershed A), Crystal Springs Creek (Watershed B), and Huntington Creek (Watershed C) encompass 80 percent of San Bruno’s land area. 19 21
20 7
12 6
9 4
2 8
5 23
22 17
10 18
13 14
3 1
15 11
16 FEET
0 500 1000 2000 10
acres
Potential Flood Zone
Watershed Boundary
Storm Drain Lines
Included in South San Francisco
Storm Drain System
Included in Millbrae Storm Drain System
Creek
City Limits
Source: Bissel & Karn, 1991; Environmental
Science Associates, 1999
*
**
Bayhill Specific
Plan Boundary
Transit Oriented
Development Overlay
FLOODING AND STORM DRAINAGE FIGURE 4.10-1
City2023-2031 Housing Element Update
of San Bruno
166 Initial Study
December 2022 (Revised January 2023)
2023-2031 Housing Element Update 167 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Water Quality
San Bruno’s storm drain system prevents flooding by channeling stormwater runoff into San Mateo County Flood and Sea Level Rise Resiliency Control District channels, which then funnel the water to the San Francisco Bay. However, this runoff is not treated, and can deliver pollutants to the Bay from any impermeable surface within the City. Stormwater runoff accounts for up to 80 percent of the pollution entering San Francisco Bay, and can contain the following pollutants: oil, grease, or antifreeze from leaking cars or trucks; paint or paint products; leaves or yard waste; pesticides; herbicides, or fertilizers from yards and gardens; solvents and household chemicals; animal wastes, litter, or sewer leakage; and construction debris such as fresh concrete, mortar, or cement.100 Groundwater
Prior to 2016, groundwater comprised 50 percent of the City’s water supply, but the City’s water supply is now predominantly sourced (90 percent) from the San Francisco Public Utilities Commission (SFPUC) and North Coast County Water District (NCCWD) with the remaining supply (10 percent) provided from groundwater from the Westside Groundwater Basin. The surface water supply is supplied from five surface water supply turnouts. The groundwater is extracted from four wells in the central portion of the 40 square mile South Westside Groundwater Basin area. A fifth well is under construction and anticipated to be complete in 2022.101 Between 2019 and 2020, the City of San Bruno supplied 3.12 million gallons per day of water to 11,902 customers, with an average water demand of 69 gallons per resident.102 The City’s 2021 Urban Water Management Plan stated the City has adequate water supplies to support the City’s water demands during normal years, but that the City’s Water Shortage Contingency Plan would need to be implemented during single- and multiple-dry year scenarios in order to reduce demand to the level of available supplies.103
Flooding and Other Hazards
The City of San Bruno has no areas designated by FEMA as 100-year floodplain. 104 A small portion of eastern San Bruno is within the 500-year floodplains; however, none of the Housing Opportunity Sites are within the 500-year floodplain.105
A tsunami is a large tidal wave caused by an underwater earthquake or volcanic eruption. Tsunamis affecting the Bay Area can result from offshore earthquakes within the Bay Area. Tsunami inundation maps for San Mateo County show that San Bruno is not within a tsunami inundation area.106
100 Ibid. 101 City of San Bruno. Water System Master Plan. December 2021. 102 3,120,000 gallons / 45,257 residents = 68.9 gallons per resident. 103 City of San Bruno. 2020 Urban Water Management Plan. November 2021. 104 City of San Bruno. San Bruno General Plan. Adopted March 24, 2009. Page 7-6. 105 Federal Emergency Management Agency. "FEMA Flood Map Service Center Search All Products - San Mateo County All Jurisdictions." Accessed September 7, 2022. https://msc.fema.gov/portal/advanceSearch. 106 California Geological Survey. Tsunami Hazard Area Map. Accessed July 28, 2022. https://maps.conservation.ca.gov/cgs/informationwarehouse/ts_evacuation/?extent=- 13734968.0269%2C4446045.3469%2C13500153.4761%2C4550305.4535%2C102100&utm_source=cgs+active&utm_content=sanmateo 2023-2031 Housing Element Update 168 Initial Study
City of San Bruno December 2022 (Revised January 2023)
A seiche is defined as a standing wave generated by rapid displacement of water within an enclosed body of water (such as a reservoir, lake, or bay) due to an earthquake that triggers land movement within the water body or landsliding into or beneath the water body. The nearest enclosed body of water is San Andreas Lake, none of the Housing Opportunity Sites are located in the vicinity of this water body.

4.10.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Violate any water quality standards or waste
discharge requirements or otherwise
substantially degrade surface or ground water
quality?
2) Substantially decrease groundwater supplies or
interfere substantially with groundwater
recharge such that the project may impede
sustainable groundwater management of the
basin?
3) Substantially alter the existing drainage pattern
of the site or area, including through the
alteration of the course of a stream or river or
through the addition of impervious surfaces, in
a manner which would:
- result in substantial erosion or siltation onor off-site; - substantially increase the rate or amount
of surface runoff in a manner which would
result in flooding on- or off-site;
- create or contribute runoff water which
would exceed the capacity of existing or
planned stormwater drainage systems or
provide substantial additional sources of
polluted runoff; or
- impede or redirect flood flows?
4) In flood hazard, tsunami, or seiche zones, risk
release of pollutants due to project inundation?
5) Conflict with or obstruct implementation of a
water quality control plan or sustainable
groundwater management plan?
2023-2031 Housing Element Update 169 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.10.2.1 Approach to Hydrology and Water Quality Analysis Hydrology and water quality impacts from future housing development would be limited to the watershed in which the Housing Opportunity site is located. As discussed in Section 4.10.1.2, San Bruno is divided into six watersheds that drain the City. The City’s primary drainage basins – San Bruno Creek (Watershed A), Crystal Springs Creek (Watershed B), and Huntington Creek (Watershed C) encompass 80 percent of San Bruno’s land area. The cumulative effect of residential development at all of the Housing Opportunity Sites on hydrology and water quality is discussed in Section 4.21, Mandatory Findings of Significance.

Impact HYD-1: The project would not violate any water quality standards or waste discharge requirements or otherwise substantially degrade surface or ground water quality. (Less than Significant Impact)
The water quality of streams, creeks, ponds, and other surface water bodies can be greatly affected by pollution carried in contaminated surface runoff. Pollutants from unidentified sources, known as nonpoint source pollutants, are washed from streets, construction sites, parking lots, and other exposed surfaces into storm drains. Urban stormwater runoff often contains contaminants such as oil and grease, plant and animal debris (e.g., leaves, dust, animal feces, etc.), pesticides, litter, and heavy metals. In sufficient concentration, these pollutants have been found to adversely affect the aquatic habitats to which they drain.

Construction Activities
Future construction activities, such as grading and excavation, may result in temporary impacts to surface water quality. When disturbance to underlying soils occurs, the surface runoff that flows across the site may contain sediments that are ultimately discharged into the storm drainage system.

Future development of Housing Opportunity Sites that would disturb more than one acre of soil would trigger conformance with the Construction General Permit, which would require an NOI to be submitted to the RWQCB and a SWPPP must be developed to establish methods for controlling discharge associated with construction activities. Future development under the Housing Element Update would also be required to comply with the City’s Municipal Code (Chapter 12.16 Grading Regulations) which requires projects to prepare and implement an erosion control plan, thereby ensuring future development complies with local and regional regulations regarding the reduction of pollutants in stormwater. Accordingly, future development under the Housing Element Update in accordance with the Construction General Permit, the City’s Municipal Code and General Plan policies would not result in significant construction-related water quality impacts. (Less than Significant Impact)
Post-Construction
Future development under the Housing Element Update would be subject to Provision C.3 of the MRP. This requires the incorporation of site design, source control and runoff treatment controls to reduce the rates, volumes and pollutant loads of runoff from the project. Further, future development under the Housing Element Update would also be required to comply the City’s Urban Runoff Management Policies, which ensures new developments follow local and regional regulations regarding the reduction of pollutants in stormwater and implement City Best Management Practices 2023-2031 Housing Element Update 170 Initial Study
City of San Bruno December 2022 (Revised January 2023)
(BMP), such as stormwater filters, to reduce such pollutants. Therefore, the Housing Element Update would have a less than significant impact on post-construction water quality. (Less than Significant Impact)
Impact HYD-2: The project would not substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the project may impede sustainable groundwater management of the basin. (Less than Significant Impact)
Groundwater levels can fluctuate due to variations in rainfall and other factors. Groundwater from the Westside Groundwater Basin supplies approximately 10 percent of the City’s water supply. At this time, specific development details are not known for future development at the Housing Opportunity Sites. In the event that below-grade excavations are expected to encounter groundwater, redevelopment of the site would require dewatering in accordance with the City’s Groundwater Discharge Regulations outlined in Section 10.12 of the Municipal Code.

The Housing Element Update would rely on existing sources of water and the city’s existing water delivery system (refer to Section 4.19 Utilities and Service Systems for a discussion of the project’s water demand as it relates to supplies). The Housing Element Update would not establish new groundwater sources or result in a substantial depletion of aquifers relied upon for local water supplies. For these reasons, the Housing Element Update would not result in a significant groundwater impact.

Impact HYD-3: The project would not substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river or through the addition of impervious surfaces, in a manner which would result in substantial erosion or siltation on- or off-site; substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site; create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff; or impede or redirect flood flows. (Less than Significant Impact)
As shown on Figure 4.10-1, there are no watercourses that intersect any of the Housing Opportunity Sites, therefore, the Housing Element Update would not alter the course of any waterways. An aboveground channelized portion of San Bruno Creek transitions belowground at the westernmost border of Site 6; San Bruno Creek remains underground until emptying into the San Bruno Canal, located approximately 1.75 miles east of Site 6.

Future construction at the Housing Opportunity Sites could temporarily alter stormwater drainage patterns. Any erosion associated with future development of the Housing Opportunity Sites would be managed in accordance with the City’s Municipal Code (refer to Impact HYD-1). Stormwater runoff would be minimized in accordance with the Construction General Permit and SWPPP. Postconstruction, future development under the Housing Element Update would be subject to Provision C.3 of the MRP and the City’s Urban Runoff Management Policies, which ensures new 2023-2031 Housing Element Update 171 Initial Study
City of San Bruno December 2022 (Revised January 2023)
developments follow local and regional regulations regarding the reduction of pollutants in stormwater and implement City BMPs, such as stormwater filters, to reduce such pollutants. With adherence to the City’s Municipal Code, Provision C.3 of the MRP, and the Construction General Permit, the rate at which stormwater runoff enters the City’s storm drainage system from Housing Opportunity Sites would be reduced, thereby minimizing the risk of potential flood events. The Housing Element Update would, therefore, not substantially alter the drainage pattern of the site or area in a manner which would result in on or offsite erosion, flooding, or runoff impacts.

Impact HYD-4: The project would not risk release of pollutants due to project inundation in flood hazard, tsunami, or seiche zones. (Less than Significant Impact) None of the Housing Opportunity Sites are located in a 100-year floodplain or within a tsunami inundation zone. None of the Housing Opportunity Sites are located near a standing body of water where seiches could occur. Therefore, the Housing Element Update would not risk release of pollutants due to project inundation.

Impact HYD-5: The project would not conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan. (Less than Significant Impact)
Water Quality Control
As discussed under Impact HYD-1, future development under the Housing Element Update would comply with the City’s Post-Construction Urban Runoff Policy 6-29 and Provision C.3 of the RWQCB Municipal Regional NPDES Permit requirements, and would implement the City’s standard permit conditions addressing construction- and operational-related surface runoff quality.

Thus, the Housing Element Update would not conflict with or obstruct implementation of the San Francisco Bay Basin Plan.

Groundwater Management Plan
All of the Housing Opportunity Sites are located in the Westside subbasin of the San Francisco Bay groundwater basin. The Westside subbasin has not been identified as a medium- or high-priority groundwater basin by the California Department of Water Resources; as such, a Groundwater Sustainability Plan does not need to be prepared for the subbasin per the requirements of the Sustainable Groundwater Management Act. Therefore, the Housing Element Update would not conflict with a sustainable groundwater management plan. 2023-2031 Housing Element Update 172 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.11 LAND USE AND PLANNING

4.11.1 Environmental Setting

4.11.1.1 Regulatory Framework
Regional and Local
Plan Bay Area 2050
Plan Bay Area 2050 is a long-range plan for the nine-county San Francisco Bay Area that provides strategies that increase the availability of affordable housing, support a more equitable and efficient economy, improve the transportation network, and enhance the region’s environmental resilience.

Plan Bay Area 2050 promotes the development of a variety of housing types and densities within identified Priority Development Areas (PDAs). PDAs are areas generally near existing job centers or frequent transit that are locally identified for housing and job growth.107 ABAG allocates regional housing needs to each city and county within the San Francisco Bay Area, based on statewide goals. These allocations are designed to lay the foundation for Plan Bay Area 2050’s long-term envisioned growth pattern for the region. ABAG also develops a series of forecasts and models to project the growth of population, housing units, and jobs in the Bay Area. ABAG, MTC, and local jurisdiction planning staff created the Forecasting and Modeling Report, which is a technical overview of the of the growth forecasts and land use models upon which Plan Bay Area 2050 is based.

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating land use and planning impacts resulting from planned development within the City including the following:

Policies Description
LUD-4 Strengthen residential integrity in viable neighborhoods within the city’s Redevelopment Area by eliminating incompatible uses and by facilitating upgrading of deteriorated structures.

LUD-16 Promote new housing and mixed-use development within Downtown to provide a larger market base for neighborhood retail shops. Establish pedestrian connections between retail fronting San Mateo Avenue and housing on the back half of blocks.

LUD-40 Promote high-intensity multi-use development along El Camino Real. Limit retail development to those sites north of Crystal Springs Road reinforcing existing retail activity in Downtown and/or The Shops at Tanforan/Towne Center.

LUD-47 Allow high-intensity mixed-use development including retail, offices, services, and housing along San Bruno Avenue, between Elm Avenue and Huntington Avenue.

HS-40 Prohibit new residential development within the 70+ Airport CNEL areas, as dictated by Airport Land Use Commission infill criteria.
107 Association of Bay Area Governments and Metropolitan Transportation Commission. Plan Bay Area 2050.

October 21, 2021.
2023-2031 Housing Element Update 173 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
HS-42 Require new residential development within the 65 dBA CNEL SFO noise contour to submit an avigation easement to the airport. Specific avigation easement requirements shall be consistent with the County of San Mateo Comprehensive Airport-Land Use Compatibility Plan for SFO.

HS-51 Require all new development to comply with FAR Part 77 height restriction standards, in accordance with Airport Land Use Commission guidelines.

Bayhill Specific Plan
Various policies in the Bayhill Specific Plan have been adopted for the purpose of avoiding or mitigating land use impacts resulting from planned development within the Bayhill Specific Plan area, including the following:

Policies Description
2-2 Allocate New Development According to Land Use Objectives and Site Feasibility.

Development is allocated on a parcel-by-parcel basis, per Table 2-2, to support significant increases in Bayhill’s regional office and hotel space, and to allow new housing development. Individual parcels are allocated amounts of development according to site conditions and other factors as described in the Specific Plan, consistent with the overall amount of development evaluated by the Bayhill Specific Plan EIR. The maximum FAR of any individual parcel shall be 2.0.
2-8 Allow Housing Development along San Bruno Avenue. The Bayhill Residential Overlay (BR) designation is established to allow for residential uses along San Bruno Avenue on the entire site at 801-851 Traeger Avenue and on 3.95 acres of the 1111 Bayhill Drive site, Parcels 4 and 13 on Figure 2-2. The BR Designation allows for up to 363 dwelling units.

As indicated by Table 2-2, a maximum of 205 units are allowed for 801-851 Traeger and a maximum of 158 units are allowed for 1111 Bayhill. When residential square footage is developed on these parcels, the Office Development square footage permitted on these parcels shall be reduced using the conversion factors listed in Table 2-3. 2-9 Create a Residential Frontage along San Bruno Avenue. New residential development along San Bruno Avenue in the Residential Overlay shall be in the form of standalone buildings that are residential-only – separate in terms of siting and program from any onsite office buildings. Residential development shall be oriented to face San Bruno Avenue, as well as Traeger and/or Elm Avenues as appropriate, and feature front porches, stoops, and other features that complement single family residences to the south and create a transition to Bayhill’s office development.
2-15 Ensure Flexibility and Resiliency. Buildings and site improvements must be designed to be flexible enough to accommodate potential changes in ownership and changing economic, environmental and social conditions. This includes changes in occupancy, as well as modifications needed to adapt to changes in energy supply and other unforeseen circumstances. Highly-customized or branded building and site designs are discouraged in favor of facilities that can be used by a variety of types of enterprises, and can be modified as needed over time. If the City approves a development project with shared facilities that cross property lines or are shared across adjacent properties, such as above or below grade pedestrian or vehicle connections, the City shall ensure through conditions of approval that 2023-2031 Housing Element Update 174 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
these facilities can be modified or removed as needed in the future to accommodate property(s) ownership changes.
2-16 Ensure Self Sufficient Development Phases. Individual phases of development shall be functionally and aesthetically self-sufficient when completed, and allow for efficient occupancy and functioning of remaining Specific Plan Area buildings, parking facilities, and infrastructure.
2-19 Ensure SFPUC-Related Development Review. Project applicants for new development shall submit conceptual design plans for work within or adjacent to SFPUC easements, including construction methods for protecting SFPUC water transmission pipelines, to the SFPUC for review and consent to the extent required under applicable SFPUC authority. 2-20 Ensure Compliance with Comprehensive Airport Land Use Compatibility Plan Policies Related to Building Permits for the Environs of San Francisco International Airport. Prior to building permit issuance, applicants of development projects within the Specific Plan Area that would exceed the FAA notification height, thirty feet in 2021, must either file the applicable Forms with the FAA and provide to the City of San Bruno an FAA determination of no hazard or air navigation finding, or provide evidence that the project is exempt from this requirement. Additionally, all properties that are offered for sale or lease shall comply with all real estate disclosure requirements required by applicable Comprehensive Airport Land Use Compatibility Plan Policy.

Grand Boulevard Initiative
San Bruno is participating in the Grand Boulevard Initiative (GBI), a collaboration of 19 cities, the counties of San Mateo and Santa Clara, local and regional agencies, private business, labor and environmental organizations united to improve the performance, safety and aesthetics of El Camino Real on the Peninsula from Daly City to downtown San Jose.

Participating cities are encouraged to design for neighborhoods that include high quality building designs and diverse land uses, preserve historic buildings and places, and enhance our economic and cultural diversity, with the broad involvement of residents, workers and local businesses. Rail stations and bus facilities are valued not only as vital transportation services, but as public gathering places and assets to spur transit-oriented development. Guiding principles of the GBI include:

1. Targets housing and job growth in strategic areas along the corridor

2. Encourage compact mixed-use development in high quality urban design and construction

3. Create a pedestrian-oriented environment and improve streetscapes, ensuring full access to and between public areas and private developments

4. Develop a balanced multimodal corridor to maintain and improve mobility of people and vehicles along the corridor

5. Manage parking assets

6. Provide vibrant public spaces and gathering places

7. Preserve and accentuate unique and desirable community character and the existing quality of life in adjacent neighborhoods

8. Improve safety and public health

9. Strengthen pedestrian and bicycle connections with the corridor 2023-2031 Housing Element Update 175 Initial Study
City of San Bruno December 2022 (Revised January 2023)

10. Pursue environmentally sustainable and economically viable development patterns

4.11.1.2 Existing Conditions
General Plan and Municipal Code Conforming Sites
Residential development at the densities proposed by the Housing Element Update (refer to Table

3.2-1) are allowed at Housing Opportunity Sites 6, 8, 10, 16, 18, and 19 under their existing General Plan land use designation and zoning designation, and therefore no General Plan amendments or rezoning is required. The existing conditions at these sites related to land use and planning are discussed below.

Housing Opportunity Site 6
Housing Opportunity Site 6 is currently developed with multiple uses, including a privately operated golf driving range, parking lot storage for a private bus operator, and a maintenance building for the San Bruno Park School District. Site 6 has a General Plan land use designation of Low Density Residential and is zoned R-1. The site is bordered by I-280 to the northeast, open space (Crestmoor Canyon) to the south consisting of forest lands and San Bruno Creek, a mix of forest with one-story and two-story residential housing (Quail Point) to the west, and two gas stations located to the north across Sneath Lane.

Housing Opportunity Site 8
Housing Opportunity Site 8 is currently developed with the former Edgemont Elementary School campus. Site 8 has a General Plan land use designation of Low Density Residential and is zoned R-1.

Site 8 is located in an urbanized area surrounded on all sides by one-story single-family residential development.

Housing Opportunity Sites 10 and 16
Housing Opportunity Sites 10 and 16 are vacant dirt lots that are located adjacent to each other on San Marco Avenue. Sites 10 and 16 have a General Plan land use designation of Low Density Residential and are zoned R-2. The sites are located in an urbanized area developed with mostly single-family residential development and various commercial uses along the El Camino Real corridor to the immediate west of the sites.

Housing Opportunity Site 18
Housing Opportunity Site 18 is developed with a medical office building. Site 18 has a General Plan land use designation of High-Density Residential and is zone P-D. Commercial uses are present to the north and south along El Camino Real, and multi-family residential developments and the Marine Corps Reserve Center are located west of the project site.

Housing Opportunity Site 19
Housing Opportunity Site 19 is developed with a single-story commercial building and surface parking lot. Site 19 has a General Plan land use designation of Multi-Use Residential Focus and is zoned C-N. The Shops at Tanforan development is located to the east, commercial uses are present to 2023-2031 Housing Element Update 176 Initial Study
City of San Bruno December 2022 (Revised January 2023)
the north and south along El Camino Real, and multi-family residential developments and the Marine Corps Reserve Center are located to the west.

Transit Corridors Plan Area Sites
As discussed in Section 3.1.1.1, Housing Opportunity Sites 1, 2, 4, 5, 7, 9, 11, 12, 15, 17, 20, 21, 22, and 23 are located within the TCP area. The TCP area is fully urbanized and characterized by diverse land uses, building forms, parcel sizes and surface parking lots. All of the TCP sites have a General Plan Designation of Transit Oriented Development. The site area zoned a mix of TOD-1, TOD-2, and CBD.

Bayhill Specific Plan Area Sites
As discussed in Section 3.1.1.2, Housing Opportunity Sites 3 and 13 are located within the urbanized Bayhill Specific Plan area. The Bayhill Specific Plan area is approximately 92.2 acres in size and encompasses the Bayhill Office Park, Bayhill Shopping Center, and Marriott Courtyard Hotel.

Existing uses adjacent to the Bayhill Specific Plan area include low-density residential neighborhoods to the south; small-scale local retail uses, hotels, and single-family residential to the east alongside and beyond El Camino Real; a mix of public parks, high-density residential neighborhoods, and public uses to the north, separated from the Specific Plan area by I-380; and residential uses to the west, separated from the Specific Plan area by I-280.

Housing Opportunity Site 14
Housing Opportunity Site 14 consists of 1122-1188 El Camino Real/300 Tanforan Shopping Center (APNs: 014-316-240; -300; -330; -360), which is developed with the Shops at Tanforan shopping mall, and 1292 Huntington Avenue (APN: 014-311-060), which is located opposite the Shops at Tanforan across the Sneath Lane/Huntington Avenue intersection and is developed with a vacant paved lot. Site 14 has a General Plan land use designation of Regional Commercial and is zoned P-D.

Site 14 is located within a heavily urbanized area and is surrounded by single-family residential development to the east and south, multi-family residential and commercial uses and the Marine Corps Reserve Center to the west, and a wide variety of development to the north, including the San Bruno Towne Center retail plaza, hotels, movie theatres, and other commercial and retail uses.

4.11.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant with
Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Physically divide an established community?
2) Cause a significant environmental impact due
to a conflict with any land use plan, policy, or
regulation adopted for the purpose of avoiding
or mitigating an environmental effect?
2023-2031 Housing Element Update 177 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact LU-1: The project would not physically divide an established community. (Less than Significant Impact)
A physical division of an established community typically refers to the construction of a physical feature (such as a wall, roadway, or railroad tracks) or the removal of a means of access (such as a local roadway or bridge) that would impair mobility within an existing community or between communities. Implementation of the Housing Element Update would facilitate new residential development in order to meet the City’s RHNA allocation. Future residential development under the Housing Element Update would occur primarily on sites either already developed and underutilized, or in close proximity to existing development. As a result, implementation of the Housing Element Update would not divide an established community. As discussed in Section 4.11.1.2, all of the Housing Opportunity Sites are located in developed areas and adjacent to existing residential development and a wide variety of commercial and retail uses. While future development under the Housing Element Update may require improvements to existing roadways and infrastructure, these improvements would likely serve to improve connectivity. In addition, there are several policies in the General Plan that serve to prevent new development from dividing existing uses (refer to Section

4.11.1.1), with adherence to these General Plan policies, implementation of the Housing Element Update would not divide an established community.

Impact LU-2: The project would not cause a significant environmental impact due to a conflict with any land use plan, policy, or regulation adopted for the purpose of avoiding or mitigating an environmental effect. (Less than Significant Impact with Mitigation Incorporated)
Conflicts of a project with land use policies do not, in and of themselves, constitute significant environmental impacts. Policy conflicts are considered environmental impacts only when the policies themselves were adopted for the purpose of avoiding or mitigating an environmental effect. Such conflicts constitute significant environmental impacts only when the resulting direct environmental effects are significant.

Plan Bay Area 2050
Plan Bay Area 2050 aims to ensure that the Bay Area is affordable, connected, diverse, healthy, and vibrant for all. The Housing Element Update addresses the City’s regional housing needs allocation upon which Plan Bay Area 2050 is based; therefore the project directly supports implementation of Plan Bay Area 2050. Additionally, Plan Bay Area 2050 identifies Growth Geographies to guide where future growth in housing and jobs will be focused over the next 30 years. These geographies are identified for growth because of their proximity to transit or access to opportunity. All of the Housing Opportunity Sites (with the exception of Sites 6 and 8) are located within a Priority Development Area.108 As previously discussed in Section 4.11.1.1, PDAs are areas located near existing job centers and transit. Future development of the Housing Opportunity Sites with residential uses in Priority Development Areas would be consistent with the key objectives of Plan 108 Metropolitan Transportation Commission. Plan Bay Area 2050 Growth Geographies. Accessed October 11, 2022. https://mtc.maps.arcgis.com/apps/webappviewer/index.html?id=af347b881594468a94ea85a67e972679 2023-2031 Housing Element Update 178 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Bay Area 2050. By locating housing near existing jobs and transit, the project would also promote the reduction of GHG emissions. Therefore, implementation of the Housing Element Update would not conflict with Plan Bay Area 2050. (Less than Significant Impact) San Mateo County Comprehensive Airport Land Use Plan
As discussed in Section 4.9.1.1, the ALUCP outlines the types of land uses that are compatible with the SFO. The determination of consistency of the project with the ALUCP considers issues such as general compatibility, noise, safety, height. Pursuant to State law, when a general plan amendment and/or zoning amendment is proposed within Airport Influence Area (AIA) Area B of an adopted Comprehensive Land Use Plan, a referral must be made to the San Francisco Airport Land Use Commission for a consistency determination. Residential uses are permitted at all of the Housing Opportunity Sites under the ALUCP, with the exception of Sites 14 and 19 due to conflicts with the noise compatibility policies provided therein. The following discussions analyze whether any conflicts with the ALUCP would result in a significant impact on the environment as a result of the Housing Element Update.

Safety
Sites 15 and 21 are located in Safety Compatibility Zone 3, and Site 14 is located in Safety Compatibility Zone 4. The remaining Housing Opportunity Sites are not located in any safety compatibility zones. Pursuant to ALUCP Table IV-2, Safety Compatibility Criteria, residential uses are compatible in Safety Zones 3 and 4. Therefore, the Housing Element is consistent with the ALUCP safety policies.

Noise
As discussed in Section 2.5.3, Housing Opportunity Sites 14 and 19 are located within the 70-75 dB CNEL noise contour and are not zoned for residential use. Residential land uses are considered incompatible with 70-75 dB CNEL noise contour by the ALUCP if they were not zoned for residential use when the current ALUCP went into effect (November 8, 2012).

Future residential development at Sites 14 and 19 would be required by the California Building Standards Code (Title 24), ALUCP (Policy NP-4) and San Bruno General Plan (Policy HS-35) to achieve an interior noise level of 45 dB CNEL or less. For residential structures exposed to aircraft noise above CNEL 60 dB, Title 24, Part 2 of the California Building Standards Code requires an acoustical analysis to demonstrate compliance with this requirement. Although Sites 14 and 19 are located in the 70-75 dB CNEL contour and development of housing on these sites would require a Local Agency Override of the ALUCP (refer to the discussion in Section 2.5.3), the Noise and Vibration Assessment (refer to Appendix B and the discussion under Impact NOI-3 in Section 4.13 of this Initial Study) determined that future residential development at Sites 14 and 19 would be able to achieve a 45 dB CNEL interior as required by Airport Land Use Compatibility Policy NP-4 and General Plan Policy HS-35. Furthermore, Title 24 and General Plan Policy HS-35 would prohibit the issuance of occupancy permits for residential development that would expose future residents to an interior noise level of greater than 45 dB CNEL. Accordingly, the Housing Element Update’s inconsistency with the noise compatibility policies provided in the ALUCP would not result in a significant effect on future residents of Sites 14 and 19. 2023-2031 Housing Element Update 179 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Height Limitations
Existing height restrictions of 50 feet AGL (up to a maximum of 90 feet AGL feet for sites located in the TCP area) for future development on the Housing Opportunity Sites (with the exception of Site 14, which has a height restriction of 126 feet and nine inches AMSL pursuant to Ordinance 1446) would ensure building heights would not exceed critical aeronautical surfaces.

The critical aeronautical surfaces at Site 14 range between 55 to 90 feet AGL, equivalent to 125 to 145 feet AMSL. Building heights at Site 14 are limited to 126 feet, nine inches AMSL by Ordinance 1446 (refer to Section 4.9.1.1). Because the 2023-2031 Housing Element is a policy document and not a specific development proposal, the airspace compatibility policies of the ALUCP do not directly apply. However, future building heights at the Housing Opportunity Sites (including Site 14) would be required to comply with SFO Policy AP-3, which states that building heights must be the “lower of (1) the height shown on the SFO critical aeronautical surfaces map (Exhibits IV-17 and IV18), or (2) the maximum height determined not to be a “hazard to air navigation” by the FAA in an aeronautical study prepared pursuant to the filing of Form 7460-1.” The use of construction equipment (such as building cranes) or the construction of buildings with heights in excess of 55 feet AGL could pose a safety hazard to construction workers and future residents. With the implementation of mitigation measure MM HAZ-5.1 (refer to discussion under Impact HAZ-5 in Section 4.9 of this Initial Study), construction equipment would not penetrate critical aeronautical surfaces, and no buildings would be constructed that exceed critical aeronautical surfaces or would result in a hazard to air navigation according to the FAA. Accordingly, implementation of the Housing Element as amended by MM HAZ-5.1 would ensure that future residential development at Site 14 would not result in a safety hazard for future workers or residents within the project area. (Less than Significant Impact with Mitigation Incorporated) General Plan and Municipal Code
Implementation of the Housing Element Update would facilitate new residential development in order to meet the City’s RHNA allocation. As set forth by state law, the General Plan serves as the primary planning document for the City and all subordinate documents and plans are required to be consistent with the General Plan.

Housing Opportunity Site 14 would require a General Plan Amendment and rezoning in order to complete buildout of the Housing Element Update, as described in Section 3.2.2. At this time, the specific land use designation and zoning district for which a General Plan Amendment and rezoning of Site 14 would be required is not known; as such, this Initial Study analyzes the reasonably foreseeable redevelopment of Site 14 with up to 1,000 residential units. The anticipated future amendment of Site 14’s land use designation and zoning district would be evaluated for potential environmental impacts to confirm whether the General Plan Amendment and rezoning are consistent with the conclusions of this Initial Study/MND or whether supplemental CEQA review would be required.

As discussed and analyzed throughout this Initial Study, future redevelopment of the Housing Opportunity Sites, including Site 14 with up to 1,000 residential units, would not result in a significant environmental impact (with mitigation incorporated) due to a conflict with any land use 2023-2031 Housing Element Update 180 Initial Study
City of San Bruno December 2022 (Revised January 2023)
plan, policy, or regulation adopted for the purpose of avoiding or mitigating an environmental effect. (Less than Significant Impact with Mitigation Incorporated) Grand Boulevard Initiative
Future development of Sites 1, 2, 4, 5, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 with residential uses in proximity to the San Bruno Bay Area Rapid Transit (BART) station, Peninsula Corridor Joint Powers Board (Caltrain) station, and El Camino Real would be consistent with the guiding principles of the GBI (refer to Section 4.11.1.1). Accordingly, the Housing Element Update would not result in a significant environmental impact due to a conflict with the GBI. (Less than Significant Impact)
2023-2031 Housing Element Update 181 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.12 MINERAL RESOURCES

4.12.1 Environmental Setting

4.12.1.1 Regulatory Framework
State
Surface Mining and Reclamation Act
The Surface Mining and Reclamation Act (SMARA) was enacted by the California legislature in 1975 to address the need for a continuing supply of mineral resources, and to prevent or minimize the negative impacts of surface mining to public health, property, and the environment. As mandated under SMARA, the State Geologist has designated mineral land classifications in order to help identify and protect mineral resources in areas within the state subject to urban expansion or other irreversible land uses which would preclude mineral extraction. SMARA also allowed the State Mining and Geology Board (SMGB), after receiving classification information from the State Geologist, to designate lands containing mineral deposits of regional or statewide significance.

California Geological Survey
As mandated by SMARA, the CGS has classified lands within the San Francisco-Monterey Bay region into Mineral Resource Zones (MRZs) based on the California State Mining and Geology Board guidelines. Areas with an MRZ-1 designation have sufficient information available indicating that there is little to no likelihood of significant mineral deposits. MRZ-2 areas are those where adequate information indicates that significant deposits are present. Areas classified as MRZ-3 contain mineral deposits, but their significance cannot be evaluated from available data. Areas are classified as MRZ-4 where available information is inadequate for assignment to any other MRZ category.109

4.12.1.2 Existing Conditions
The City of San Bruno west of Highway 101 and east of I-280 is classified as MRZ-1. Upland areas between I-280 and Skyline Boulevard are classified as MRZ-3 for deposits of Merced Formation sand and gravel. All of the Housing Opportunity Sites with the exception of Site 6 are located west of Highway 101 and east of I-280. Site 6 is located between I-280 and Skyline Boulevard. There are no known mineral resources or resource recovery sites present at any of the Housing Opportunity Sites except Site 6, which contains Merced formation sand and gravel. 109 City of San Bruno. San Bruno General Plan Draft Environmental Impact Report. December 2008. 2023-2031 Housing Element Update 182 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.12.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Result in the loss of availability of a known
mineral resource that would be of value to the
region and the residents of the state?
2) Result in the loss of availability of a locally
important mineral resource recovery site
delineated on a local general plan, specific
plan, or other land use plan?

4.12.2.1 Mineral Resources Analysis
As documented in Section 4.12.1.2, there are no known mineral resources or resource recovery sites present at any of the Housing Opportunity Sites with the exception of Site 6, which is located on Merced Formation sand and gravel. Site 6 has never been used a mineral resource recovery site, nor delineated as a locally important mineral resource recovery site in the General Plan, and is planned for residential uses in the current General Plan, and future residential development at Site 6 would not lead to the loss of locally important sand and gravel present in the site’s subsurface. Accordingly, future development under the Housing Element Update would have no impact on mineral resources. 2023-2031 Housing Element Update 183 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.13 NOISE AND VIBRATION
The following discussion is based, in part, on a Noise and Vibration Assessment prepared for the Housing Element Update by Illingworth & Rodkin, Inc. A copy of this report, dated September 2022, is attached to this Initial Study as Appendix B.

4.13.1 Environmental Setting

4.13.1.1 Background Information
Noise
Factors that influence sound as it is perceived by the human ear, include the actual level of sound, period of exposure, frequencies involved, and fluctuation in the noise level during exposure. Noise is measured on a decibel scale, which serves as an index of loudness. The zero on the decibel scale is based on the lowest sound level that the healthy, unimpaired human ear can detect. Each 10 decibel increase in sound level is perceived as approximately a doubling of loudness. Because the human ear cannot hear all pitches or frequencies, sound levels are frequently adjusted or weighted to correspond to human hearing. This adjusted unit is known as the A-weighted decibel, or dBA.

Since excessive noise levels can adversely affect human activities and human health, federal, state, and local governmental agencies have set forth criteria or planning goals to minimize or avoid these effects. Noise guidelines are generally expressed using one of several noise averaging methods, including Leq, DNL, or CNEL.110 These descriptors are used to measure a location’s overall noise exposure, given that there are times when noise levels are higher (e.g., when a jet is taking off from an airport or when a leaf blower is operating) and times when noise levels are lower (e.g., during lulls in traffic flows on freeways or in the middle of the night). Lmax is the maximum A-weighted noise level during a measurement period.

Vibration
Ground vibration consists of rapidly fluctuating motions or waves with an average motion of zero.

Vibration amplitude can be quantified using Peak Particle Velocity (PPV), which is defined as the maximum instantaneous positive or negative peak of the vibration wave. PPV has been routinely used to measure and assess ground-borne construction vibration. Studies have shown that the threshold of perception for average persons is in the range of 0.008 to 0.012 inches/second (in/sec) PPV.
110 Leq is a measurement of average energy level intensity of noise over a given period of time. Day-Night Level (DNL) is a 24-hour average of noise levels, with a 10 dB penalty applied to noise occurring between 10:00 PM and 7:00 AM. Community Noise Equivalent Level (CNEL) includes an additional five dB applied to noise occurring between 7:00 PM and 10:00 PM. Where traffic noise predominates, the CNEL and DNL are typically within two dBA of the peak-hour Leq.
2023-2031 Housing Element Update 184 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.13.1.2 Regulatory Framework
Federal and State
Federal Transit Administration Vibration Limits
The Federal Transit Administration (FTA) has developed vibration impact assessment criteria for evaluating vibration impacts associated with transit projects. The FTA has proposed vibration impact criteria based on maximum overall levels for a single event. The impact criteria for groundborne vibration are shown in Table 4.13-1 below. These criteria can be applied to development projects in jurisdictions that lack vibration impact standards.

Table 4.13-1: Groundborne Vibration Impact Criteria
Land Use Category
Groundborne Vibration Impact Levels
(VdB inch/sec)
Frequent
Event
Occasional
Events
Infrequent
Events
Category 1: Buildings where vibration would interfere
with interior operations 65 65 65
Category 2: Residences and buildings where people
normally sleep 72 75 80
Category 3: Institutional land uses with primarily
daytime use 75 78 83
Source: Federal Transit Administration. Transit Noise and Vibration Assessment Manual. September 2018.

California Building Standards Code
The CBC establishes uniform minimum noise insulation performance standards to protect persons within new buildings housing people, including hotels, motels, dormitories, apartments, and dwellings other than single-family residences. Title 24 mandates that interior noise levels attributable to exterior sources do not exceed 45 Ldn/CNEL in any habitable room. Exterior windows must have a minimum Sound Transmission Class (STC) of 40 or Outdoor-Indoor Transmission Class (OITC) of 30 when the property falls within the 65 dBA DNL noise contour for a freeway or expressway, railroad, or industrial source.

Regional and Local
San Mateo County Comprehensive Airport Land Use Plan
The ALUCP for the Environs of the SFO, prepared by the C/CAG, is a State-mandated land use compatibility plan that addresses the compatibility of surrounding land uses in local jurisdictions with airport operations.

Noise compatibility policies described within the ALUCP are intended to minimize the exposure of residents and occupants of future noise-sensitive development to excessive noise. CNEL noise 2023-2031 Housing Element Update 185 Initial Study
City of San Bruno December 2022 (Revised January 2023)
contours identify areas where noise exposure is great enough to warrant land use controls to promote noise compatibility. The ALUCP includes forecasted 2015 and 2020 CNEL noise contours. Included in the ALUCP are policies and standards to protect people living in the vicinity of SFO from the effects of aircraft noise. Policy NP-2, Airport/Land Use Compatibility Criteria, establishes criteria to determine the compatibility of proposed land uses in the Airport Noise Compatibility Zones.

Residential uses are compatible with noise levels below 65 dB, conditionally compatible with noise levels between 65 and 70 dB, and generally incompatible with noise levels in excess of 70 dB.

Residential uses are considered conditionally compatible in areas within the 70-75 dB CNEL noise contour only if the proposed use is on a lot of record zoned for residential use as of the effective date of the ALUCP. Residential uses are considered incompatible in areas within the 70-75 dB CNEL noise contour if they were not zoned for residential use when the ALUCP went into effect or if they are located in a 75 dB CNEL or greater noise contour.

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating noise and vibration impacts resulting from planned development within the City including the following:

Policies Description
ERC-3 Protect natural vegetation in park, open space, and scenic areas as wildlife habitat, to prevent erosion, and to serve as noise and scenic buffers.

HS-F Protect the health and comfort of residents by reducing the impact of noise from automotive vehicles, San Francisco International Airport, railroad lines, and stationary sources.

HS-G Ensure that all development heeds safety precautions from the San Francisco International Airport.

HS-32 Encourage developers to mitigate ambient noise levels adjacent to major noise sources by incorporating acoustical site planning into their projects. Utilize the City‘s Building Code to implement mitigation measures, such as:
• Incorporating buffers and/or landscaped berms along high-noise roadways or railways;
• Incorporating traffic calming measures and alternative intersection design within and/or adjacent to the project;
• Using reduced-noise pavement (rubberized asphalt); and • Incorporating state-of-the-art structural sound attenuation measures.

HS-33 Prevent the placement of new noise sensitive uses unless adequate mitigation is provided.

Establish insulation requirements as mitigation measures for all development, per the standards in Table 7-1.

HS-35 Require developers to comply with relevant noise insulation standards contained in Title 24 of the California Code of Regulations (Part 2, Appendix Chapter 12A).

HS-36 Encourage developers of new residential projects to provide noise buffers other than sound walls, such as vegetation, storage areas, or parking, as well as site planning and locating bedrooms away from noise sources.

HS-37 Require that all sponsors of new housing (residential and senior housing units) record a notice of Fair Disclosure, regarding the proximity of the proposed development to San 2023-2031 Housing Element Update 186 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
Francisco International Airport and of the potential impacts of aircraft operation, including noise impacts, per Ordinance 1646 and AB 2776.

HS-38 Require developers to mitigate noise exposure to sensitive receptors from construction activities. Mitigation may include a combination of techniques that reduce noise generated at the source, increase the noise insulation at the receptor, or increase the noise attenuation rate as noise travels from the source to the receptor.

HS-39 Pursue mitigation of noise impacts from the San Francisco International Airport to the fullest extent possible. Support and advocate for operational practices, changes to aircraft, new technologies, and physical improvements that would reduce the area in San Bruno impacted by aircraft noise.

HS-40 Prohibit new residential development within the 70+ Airport CNEL areas, as dictated by Airport Land Use Commission infill criteria.

HS-41 Encourage SFO Airport authorities to undertake noise abatement and mitigation programs that are based not only on the airport’s noise contour maps, but that consider other factors such as the frequency of over-flights, altitude of aircraft, and hours of operation.

HS-42 Require new residential development within the 65 dBA CNEL SFO noise contour to submit an avigation easement to the airport. Specific avigation easement requirements shall be consistent with the County of San Mateo Comprehensive Airport-Land Use Compatibility Plan for SFO.

HS-42 Require new residential development within the 65 dBA CNEL SFO noise contour to provide an avigation easement to the airport prior to issuing occupancy permits.

HS-43 Allow reasonable latitude for noise generated by uses that are essential to community health, safety, and welfare, such as emergency vehicle operations and sirens.

HS-44 Adopt traffic mitigations – including reduced speed limits, improved paving texture, and traffic signal controls – to reduce noise in areas where residential development may front on high-traffic arterials, such as El Camino Real.

HS-45 Where feasible and appropriate, develop and implement noise reduction measures when undertaking improvements, extensions, or design changes to San Bruno streets.

HS-46 Encourage transit vehicles to develop and apply noise reduction technologies to reduce the noise and vibration impacts of Caltrain, BART and bus traffic.

HS-47 Enforce Vehicle Code noise emission standards, as well as provisions which prohibit alteration of vehicular exhaust systems in ways that increases noise levels.

HS-49 Actively and aggressively participate in forums and discussions regarding operations and expansion plans for San Francisco International Airport. Seek local representation on task forces, commissions, and advisory boards established to guide airport policies and programs.

LUD-31 Develop a green buffer along Huntington Avenue, as illustrated in Figure 2-7 to buffer residents from BART and Caltrain activities.

T-G Protect residential areas from congestion and associated noise resulting from BART and Caltrain spillover traffic.
2023-2031 Housing Element Update 187 Initial Study
City of San Bruno December 2022 (Revised January 2023)
City of San Bruno Municipal Code
Regulations pertaining to permitted noise levels and operational hours associated with construction as well as acceptable noise levels from stationary sources are provided in the San Bruno Municipal Code. Relevant portions of the Municipal Code regarding noise and hours of operation include:
• Title 6 “Public Peace, Morals, and Welfare”, Chapter 6.16 “Noise Regulations” Ambient noise levels in residential zones are limited to 45 decibels from 10 p.m. to seven a.m. and 60 decibels from seven a.m. to 10 p.m. Noise levels exceeding the ambient base level by more than 10 decibels is a violation, except during the period seven a.m. to 10 p.m. where the ambient base level may be exceeded by 20 decibels for a period not to exceed 30 minutes during any 24 hour period. Construction noise levels are not permitted to exceed 85 decibels as measured at 100 feet, or exceed between the hours of 10 p.m. and seven a.m. a noise level of 60 decibels as measured at 100 feet without a permit from the Director of Public Works.
• Title 12 “Land Use”, Article I. “Excavation and Grading”, Chapter 12.16 “Grading Regulations”
All grading and noise therefrom, including but not limited to, warming of equipment motors in residential zones, or within 1,000 feet of any residential occupancy, hotel, motel, or hospital shall be limited to those hours between seven a.m. and 5:30 p.m. on weekdays, unless other hours are approved by the city engineer based upon evidence that an emergency exists which would constitute a hazard to persons or property if grading at other times is not permitted.

Bayhill Specific Plan
As noted in Section 3.1.1.1, Housing Opportunity Sites 3 and 13 are located within the Bayhill Specific Plan area. Chapters Three and Six of the Bayhill Specific Plan include mandatory “Urban Design” and “Environmental Quality” policies, including the following which pertain to noise and vibration.

Policy 3-13
Policy 3-13 requires projects to design outdoor use areas and public open spaces to reduce their exposure to traffic noise through building orientation and location.

Policy 3-27
Policy 3-27 requires building designs to reduce freeway- and airport-related noise intrusion into interior building spaces through the use of noise insulating walls, windows, and doors, and locating bedrooms and other noise-sensitive rooms away from noise sources.

Policy 6-1
Policy 6-1 requires projects to complete acoustical evaluations and implement necessary noise attenuation design measures to reduce interior noise levels to 45 dBA or less. 2023-2031 Housing Element Update 188 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policy 6-3
Policy 6-3 requires the preparation of a nighttime construction noise control plan that demonstrates that noise from construction activities will comply with the City’s noise limit of 60 dBA at a distance of 100 feet.

Policy 6-4
Policy 6-4 requires the preparation of a noise analysis prior to the operation of any amplified music, HVAC equipment, emergency generators, loading docks, and mechanical equipment that demonstrates noise levels would not exceed City standards at adjacent land uses or result in a 10 dB or greater increase in ambient noise levels. A noise control plan would be required for any proposed uses that would exceed City standards at adjacent land uses or result in a 10 dB or greater increase in ambient noise levels.

Policy 6-5
Policy 6-5 prohibits amplified sound from resulting in noise levels in excess of 15 dBA at a distance of 100 feet in comparison with ambient noise levels; future development would be required to submit a noise analysis demonstrating compliance with the aforementioned limitations or noise-monitoring and real time adjustments during events with amplified sound.

Policy 6-6
Policy 6-6 limits the testing of emergency generators to the hours of seven a.m. to 10 p.m.

4.13.1.3 Existing Conditions
The existing noise environment was quantified through four short-term noise measurements (ST-1 through ST-4) and four long-term measurements (LT-1 through LT-4). The noise measurement locations are shown on Figure 4.13-1, and summarize below.

Long-Term Noise Measurements
Noise measurement LT-1 was at Housing Opportunity Site 21. LT-1 was located about 45 feet west of the Huntington Avenue centerline. Traffic along Huntington Avenue, railroad noise from the Union Pacific railroad tracks, and aircraft noise from SFO were the primary sources of noise in the area. Hourly average noise levels ranged from 65 to 73 dBA Leq during the day and from 57 to 71 dBA Leq at night. The average noise exposure level at this location on Thursday, August 18, 2022 was 73 dBA Ldn.

Noise measurement LT-2 was at Housing Opportunity Site 20. LT-2 was located about 140 feet west of the El Camino Real centerline. Traffic along El Camino Real and aircraft noise from SFO were the primary sources of noise in the area. Hourly average noise levels ranged from 64 to 68 dBA Leq during the day and from 58 to 68 dBA Leq at night. The average noise exposure level at this location on Thursday, August 18, 2022 was 71 dBA Ldn.

Shar p Pa kr Roa d
Mori Ridge Trail
Notch Trail
Sweeney Rid
Sne athLane Tr ail
San Andreas Trail
San Bruno
Creek
Colma Creek
U P. .R R. .

U.P.R.R.

Centennial Way Trail
Shar
p Pa kr Roa d
M
o
ri
Ridge
Trail
Notch Trail
Sweeney Ridge Trail
Sne
ath
Lane Tr a
il
San Andreas Trail
San Bruno
Creek
Colma Creek
U P. .R R. .

U.P.R.R.

Centennial Way Trail
35 35
82 82
101
101
280
280
380
El Camino Real
Skyline Boulevard Skyline Boulevard
ST-2 ST-3
ST-4
ST-1
LT-3
LT-4
LT-2 LT-1
ge Trail
Aerial Source: Google Earth Pro, May 13, 2022. Photo Date: Aug. 2020 0 .25 .5 .75 1 Mile City of San Bruno
Long-Term Noise
Measurement Location LT-#
Short-Term Noise
Measurement Location ST-#
NOISE MEASUREMENT LOCATIONS FIGURE 4.13-1
City of San Bruno2023-2031 Housing Element Update 189 Initial Study December 2022 (Revised January 2023)
2023-2031 Housing Element Update 190 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Noise measurement LT-3 was at Housing Opportunity Site 13. LT-3 was located about 65 feet north of the San Bruno Avenue centerline. Traffic along San Bruno Avenue was the primary source of noise in the area. Hourly average noise levels ranged from 64 to 72 dBA Leq during the day and from 56 to 65 dBA Leq at night. The average noise exposure level at this location on Thursday, August 18, 2022 was 69 dBA Ldn.

Noise measurement LT-4 was made at a location representative of Housing Opportunity Site 14. LT4 was located about 165 feet north of the I-380 centerline. Traffic along I-380 was the primary source of noise in the area. Hourly average noise levels ranged from 68 to 72 dBA Leq during the day and from 62 to 71 dBA Leq at night. The average noise exposure level at this location on Thursday, August 18, 2022 was 75 dBA Ldn. Figures A10 through A12 in Appendix A show the trend in noise levels throughout the measurement period from August 17, 2022 to August 19, 2022.

Short-Term Noise Measurements
Short-term noise measurement ST-1 was conducted on Wednesday, August 17, 2022, between 11:40 a.m. and 11:50 a.m. to document typical noise levels expected at Housing Opportunity Site 19. This location was approximately 85 feet from the centerline of El Camino Real. El Camino Real traffic typically produced noise levels ranging from 58 to 81 dBA, and a jet flyover produced noise levels up to 82 dBA. The 10-minute Leq measured at ST-1 was 71 dBA.

Short-term noise measurement ST-2 was conducted on Wednesday, August 17, 2022, between 12:30 p.m. and 12:40 p.m. to document typical noise levels expected at Housing Opportunity Site 3. This location was approximately 50 feet from the centerline of San Bruno Avenue. San Bruno Avenue traffic typically produced noise levels ranging from 62 to 80 dBA. The 10-minute Leq measured at ST-2 was 70 dBA.

Short-term noise measurement ST-3 was conducted on Friday, August 19, 2022, between 9:20 a.m. and 9:30 a.m. to document typical noise levels expected at Housing Opportunity Site 9. This location was approximately 65 feet from the centerline of El Camino Real. El Camino Real traffic typically produced noise levels ranging from 57 to 76 dBA, and a jet flyover produced noise levels up to 76 dBA. The 10-minute Leq measured at ST-3 was 69 dBA.

Short-term noise measurement ST-4 was conducted on Friday, August 19, 2022, between 9:40 a.m. and 9:50 a.m. to document typical noise levels expected at Housing Opportunity Site 8. This location was approximately 55 feet from the centerline of Jenevein Avenue. Jenevein Avenue traffic typically produced noise levels ranging from 53 to 68 dBA, and two jets produced noise levels ranging from 53 to 55 dBA. The 10-minute Leq measured at ST-4 was 57 dBA. 2023-2031 Housing Element Update 191 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.13.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project result in:
1) Generation of a substantial temporary or
permanent increase in ambient noise levels in
the vicinity of the project in excess of
standards established in the local general plan
or noise ordinance, or applicable standards of
other agencies?
2) Generation of excessive groundborne vibration
or groundborne noise levels?
3) For a project located within the vicinity of a
private airstrip or an airport land use plan or,
where such a plan has not been adopted,
within two miles of a public airport or public
use airport, would the project expose people
residing or working in the project area to
excessive noise levels?
Impact NOI-1: The project would not result in generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies. (Less than Significant Impact) Operational Noise
Increases in traffic noise gradually degrade the environment in areas sensitive to noise. According to CEQA, “a substantial increase” is necessary to cause a significant environmental impact. For purposes of this Initial Study, a substantial increase would occur if the noise level increase is 5 dBA Ldn or greater, with a future noise level of less than 60 dBA Ldn, or the noise level increase is 3 dBA Ldn or greater, with a future noise level of 60 dBA Ldn or greater.

Vehicular traffic on roadways in the City would increase as development occurs and the City’s population increases. These projected increases in traffic would, over time, increase noise levels throughout the community.

As summarized in Table 4.13-2, traffic noise levels would generally increase by 0 to 1 dBA Ldn due to anticipated traffic volumes along major roadways in San Bruno. The traffic noise increases attributable to the implementation of the Housing Element Update would not result in a substantial permanent increase noise levels in the community. (Less than Significant Impact) 2023-2031 Housing Element Update 192 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Table 4.13-2: PM Peak Hour Traffic Volumes and Project Generated Traffic Noise Increases1
Roadway Location
PM Peak Hour Volumes Project Noise Increase
(dBA)
Existing Existing
+ Project Background Background+ Project
Versus
Existing
Versus
Background
Sneath
Lane
W. of I280 SB
Ramp
896 986 1,335 1,425 0.4 0.3
Sneath
Lane
E. of I-280
NB Ramp 1,448 1,534 2,486 2,572 0.3 0.1
El Camino
Real
N. of I-380
WB Ramp 4,562 4,922 4,676 5,036 0.3 0.3
El Camino
Real
S. of I-380
EB Ramp 3,673 3,901 5,028 5,256 0.3 0.2
El Camino
Real
N. of
Crystal
Springs
Avenue
3,180 3,349 3,978 4,147 0.2 0.2
El Camino
Real
S. of
Crystal
Springs
Avenue
3,382 3,542 4,180 4,340 0.2 0.2
San Bruno
Avenue
W. of El
Camino
Real
1,607 1,899 3,068 3,360 0.7 0.4
San Bruno
Avenue
E. of El
Camino
Real
1,531 1,645 2,052 2,166 0.3 0.2
Huntington
Avenue
N. of San
Mateo
Avenue
1,226 1,232 1,229 1,235 0.0 0.0
San Mateo
Avenue
S. of
Huntington
Avenue
715 721 715 721 0.0 0.0
Crystal
Springs
Avenue
W. of El
Camino
Real
802 811 802 811 0.0 0.0
Source: Illingworth & Rodkin, Inc. Housing Element Update Noise and Vibration Assessment. November 2022.

Notes:
1 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study.

Construction Noise
Noise impacts resulting from construction depend on the noise generated by various pieces of construction equipment, the timing and duration of noise-generating activities, the distance between 2023-2031 Housing Element Update 193 Initial Study
City of San Bruno December 2022 (Revised January 2023)
construction noise sources and noise-sensitive receptors, any shielding provided by intervening structures or terrain, and ambient noise levels. Construction noise impacts primarily result when construction activities occur during noise-sensitive times of the day (early morning, evening, or nighttime hours), when construction occurs in areas immediately adjoining noise-sensitive land uses, or when construction durations last over extended periods of time.

Each construction phase would include a different mix of equipment operating. The highest noise levels are typically generated when impact tools are used (e.g., jackhammers, hoe rams). Site grading and excavation activities would also generate high noise levels, as these phases often require the simultaneous use of multiple pieces of heavy equipment (e.g., dozers, excavators, scrapers, loaders).

Pile driving activities are typically during foundation work and would generate loud noise levels.

Lower noise levels result from construction activities when less heavy equipment is required to complete the tasks or construction activities move indoors. Typical construction levels at a distance of 50 feet are presented in Table 4.13-3. Most demolition and construction noise falls in the range of 80 to 90 dBA at 50 feet from the source. Construction-generated noise levels drop off/increase at a rate of about six dBA per doubling/halving of the distance between the source and receptor.

Shielding by buildings or terrain can provide an additional five to 10 dBA noise reduction at distant receptors.

Table 4.13-3: Typical Ranges of Construction Noise Levels at 50 Feet, Leq (dBA) Construction
Activity
Domestic
Housing
Office Building,
Hotel, Hospital,
School, Public
Works
Industrial
Parking Garage,
Religious
Amusement &
Recreations,
Store, Service
Station
Public Works
Roads &
Highways,
Sewers, and
Trenches
Ground
Clearing

I II I II I II I II
Excavation 83 83 84 84 84 83 84 84
Foundations 88 75 89 79 89 71 88 78
Erection 81 65 87 75 84 72 79 78
Finishing 88 72 89 75 89 74 84 84
Source: Illingworth & Rodkin, Inc. Housing Element Update Noise and Vibration Assessment. November 2022.

Notes:

I – All pertinent equipment present at site.

II – Minimum required equipment present at site.

For purposes of this Initial Study, a significant temporary noise impact would be identified if construction noise levels would exceed the noise limits specified in the San Bruno Municipal Code.

Pursuant to San Bruno Municipal Code Section 6.16.070, noise from construction activities within any residential zone, or within 500 feet of any residential zone, is limited to 85 dBA, as measured at 100 feet from the source between the hours of 7:00 a.m. and 10:00 p.m., unless a permit has been 2023-2031 Housing Element Update 194 Initial Study
City of San Bruno December 2022 (Revised January 2023)
obtained to exceed this level. Between the hours of 10:00 p.m. and 7:00 a.m., construction noise is limited to 60 dBA at 100 feet from the source, unless a permit is obtained.

The exact construction activities and associated equipment that would be used throughout buildout of the Housing Element Update are not known at this time. For purposes of analyzing a representative scenario, the construction equipment and phasing information of an example 90-unit multi-family project was used to calculate construction noise levels on an hourly basis (Hourly Leq). 111 The
construction noise levels would represent the majority of residential construction projects anticipated under the Housing Element Update, although the duration of construction would vary depending on the size of the development. The Federal Highway Administration’s Roadway Construction Noise Model (RCNM) was used to calculate the hourly average noise levels for each phase of construction, assuming the two loudest pieces of equipment would operate simultaneously, as recommend by the FTA for construction noise evaluations. Table 4.13-4 below summarizes representative construction noise levels for a typical residential development.

Table 4.13-4: Representative Construction Noise Levels1 Phase Construction
Equipment (Quantity)
Calculated Hourly Average Leq and Ldn (dBA) From
Operation
of Two Loudest Pieces of Construction Equipment
Noise
Level at
50 feet
Noise
Level at
100 feet
Noise
Level at
200 feet
Noise
Level at
400 feet
Noise
Level at
500 feet
Demolition
Concrete/Industrial Saw
(1)*
Excavator (2)
Rubber-Tired Dozer (1)
Tractor/Loader/Backhoe
(2)*
85 79 73 67 65
Site
Preparation
Grader (2)*
Rubber-Tired Dozer (2)
Tractor/Loader/Backhoe
(2)
84 78 72 66 64
Grading/
Excavation
Excavator (4)
Grader (2)
Rubber Tired Dozer (1)
Concrete/Industrial Saw
(2)*
Tractor/Loader/Backhoe
(2)
86 80 74 68 66
Trenching/
Foundation
Excavator (2)*
Tractor/Loader/Backhoe
(2)*
82 76 70 64 62
Building
Exterior
Crane (3)
Forklift (2)
Generator Set (1)*
Tractor/Loader/Backhoe
(2)*
82 76 70 64 62
111 The noise assessment assumes that the 90-unit multi-family project would be constructed over a 20-month period. While some of the Housing Opportunity sites could yield more than 90 units, the amount of equipment on any given site would be representative.
2023-2031 Housing Element Update 195 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Table 4.13-4: Representative Construction Noise Levels1 Phase Construction
Equipment (Quantity)
Calculated Hourly Average Leq and Ldn (dBA) From
Operation
of Two Loudest Pieces of Construction Equipment
Noise
Level at
50 feet
Noise
Level at
100 feet
Noise
Level at
200 feet
Noise
Level at
400 feet
Noise
Level at
500 feet
Welders (2)
Building
Interior/
Architectural
Coating
Aerial Lift (2)
Air Compressor (10)* 77 71 65 59 57
Paving
Cement and Mortar
Mixer (4)
Paver (4)
Paving Equipment (4)
Roller (4)
Tractor/Loader/Backhoe
(4)*
83 77 71 65 63
Source: Illingworth & Rodkin, Inc. Housing Element Update Noise and Vibration Assessment. November 2022.

Notes:
1 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study.

As shown in Table 4.13-4, representative construction noise levels are expected to range from 71 to 80 dBA Leq at 100 feet from the noise source. These levels are below the City’s daytime construction noise standard of 85 dBA at a distance of 100 feet. Construction noise impacts would be further reduced through compliance with the construction hours and noise levels specified in the City’s Municipal Code and General Plan Policy HS-38, which requires that developers mitigate noise exposure to sensitive receptors from construction activities. The Noise and Vibration Assessment (refer to Appendix B) identified the following best management practices for reducing construction noise to ensure that future development at the Housing Opportunity Sites complies with General Plan Policy HS-38.

Best Management Practices:
• Construction equipment shall be well-maintained and used judiciously to be as quiet as practical;
• Equip all internal combustion engine-driven equipment with mufflers, which are in good condition and appropriate for the equipment;
• Utilize “quiet” models of air compressors and other stationary noise sources where technology exists;
• Locate all stationary noise-generating equipment, such as air compressors and portable power generators, away from noise-sensitive receptors;
2023-2031 Housing Element Update 196 Initial Study
City of San Bruno December 2022 (Revised January 2023)
• Locate staging areas and construction material areas away from noise-sensitive receptors; • Prohibit all unnecessary idling of internal combustion engines; • Consider temporary noise barriers during construction phases involving earth moving equipment (e.g., grading operations) where they would be effective in reducing the construction noise impact, when directly adjoining sensitive receptors. An eight-foot plywood noise barrier could reduce noise levels by at least 5 dBA. • Designate a “disturbance coordinator” who would be responsible for responding to any local complaints about construction noise. The disturbance coordinator will determine the cause of the noise complaint (e.g., starting too early, bad muffler, etc.) and will require that reasonable measures warranted to correct the problem be implemented. Conspicuously post a telephone number for the disturbance coordinator at the construction site and include it in the notice sent to neighbors regarding the construction schedule.

Implementation of the best management practices outlined above as required by General Plan Policy HS-38 would ensure that developers mitigate noise exposure to sensitive receptors by reducing construction noise levels emanating from the site and minimizing disruption and annoyance.

Additionally, construction noise associated with buildout of the Housing Opportunity Sites within the TCP and Bayhill Specific Plan areas would be further reduced with adherence to the mitigation measures identified below.
• TCP EIR Mitigation 11-1: All proposed new multifamily residential, transient lodging or other noise-sensitive uses within the Transit Corridors Area shall submit for City approval a noise study, consistent with the requirements of the California Building Code, to identify noise reduction measures necessary to achieve compatibility with City General Planidentified land use/noise compatibility standards and State Title 24 noise compatibility standards. The noise study shall be approved by the City’s Building Division prior to issuance of a building permit. Identified noise reduction measures, in order of preference so that windows can be opened, may include:
o Site and building design so as to minimize noise in shared residential outdoor activity areas by locating such areas behind the buildings, in courtyards, or orienting the terraces toward the interior of lots rather than streets; o Site and building design so as to minimize noise in the most intensively occupied and noise-sensitive interior spaces of units, such as bedrooms, by placing such interior spaces and their windows and other openings in locations with less noise exposure; o Design of windows, doors, and other sound transmission paths such as ventilation openings, walls, and roofs to achieve a high Sound Transmission Class (STC) rating and/or other noise-attenuating characteristics.
o Installation of forced air mechanical ventilation systems in all units exposed to noise levels exceeding Title 24 standards to allow residents the option of reducing noise by keeping the windows closed.
• TCP EIR Mitigation 11-2: Prior to any discretionary City approval of new habitable buildings within 100 feet of the centerline of the Caltrain tracks, completion of a detailed 2023-2031 Housing Element Update 197 Initial Study
City of San Bruno December 2022 (Revised January 2023)
site-specific vibration study shall be required demonstrating to City satisfaction that groundborne vibrations associated with rail operations either (1) would not exceed applicable FTA groundborne vibration impact assessment criteria, or (2) can be reduced to below the applicable FTA criteria thresholds through building design and construction measures (e.g., stiffened floors, modified foundations).
• TCP EIR Mitigation 11-3. Reduce ground-borne vibration levels during individual, sitespecific project demolition and construction periods by requiring applicant incorporation of conditions in individual discretionary project demolition and construction contractor agreements within the Transit Corridors Area that stipulate the following ground-borne vibration abatement measures:
o Restrict vibration-generating activity to between the hours of 7:00 a.m. and 5:00 p.m., Monday through Friday. Prohibit such activity on weekends and holidays. o Notify occupants of land uses located within 200 feet of proposed pile-driving activities of the project construction schedule in writing. o Investigate in consultation with City staff possible pre-drilling of pile holes as a means of minimizing the number of percussions required to seat the pile. o Conduct a pre-construction site survey documenting the condition of any historic structure located within 200 feet of proposed pile driving activities. o Monitor pile driving vibration levels to ensure that vibration does not exceed appropriate thresholds for the potentially affected building (5mm/sec or 0.2 inches/sec ppv for structurally sound buildings).
• TCP EIR Mitigation 11-4. Reduce demolition and construction noise impacts on adjacent uses by requiring applicant incorporation of conditions in individual discretionary project demolition and construction contract agreements within the Transit Corridors Area that stipulate the following conventional construction-period noise abatement measures:
o Construction Plan. Prepare a detailed construction plan identifying the schedule for major noise-generating construction activities. The construction plan shall identify a procedure for coordination with nearby noise-sensitive facilities so that construction activities and the event schedule can be scheduled to minimize noise disturbance. The plan shall stipulate the measures that result in compliance with the noise ordinance. o Construction Scheduling. Ensure that noise-generating construction activity is limited to between the hours of 7:00 AM to 8:00 PM.
o Construction Equipment Mufflers and Maintenance. Equip all internal combustion engine-driven equipment with intake and exhaust mufflers that are in good condition and appropriate for the equipment.
o Equipment Locations. Locate stationary noise-generating equipment as far as possible from sensitive receptors when sensitive receptors adjoin or are near a construction project site.
o Construction Traffic. Route all construction traffic to and from the construction sites via designated truck routes where possible. Prohibit construction-related heavy truck traffic in residential areas where feasible.
2023-2031 Housing Element Update 198 Initial Study
City of San Bruno December 2022 (Revised January 2023)
o Quiet Equipment Selection. Use quiet construction equipment, particularly air compressors, wherever possible.
o Temporary Barriers. Construct solid plywood fences around construction sites adjacent to residences, operational businesses, or noise-sensitive land uses. o Temporary Noise Blankets. Temporary noise control blanket barriers should be erected, if necessary, along building facades of construction sites. This mitigation would only be necessary if conflicts occurred which were irresolvable by proper scheduling. (Noise control blanket barriers can be rented and quickly erected.) o Noise Disturbance Coordinator. For larger construction projects, the City may choose to require project designation of a “Noise Disturbance Coordinator” who would be responsible for responding to any local complaints about construction noise. The Disturbance Coordinator would determine the cause of the noise complaint (e.g., starting too early, bad muffler, etc.) and institute reasonable measures to correct the problem. Conspicuously post a telephone number for the Disturbance Coordinator at the construction site and include it in the notice sent to neighbors regarding the construction schedule. (The project sponsor should be responsible for designating a Noise Disturbance Coordinator, posting the phone number, and providing construction schedule notices. The Noise Disturbance Coordinator would work directly with an assigned City staff member.)
• Bayhill Specific Plan EIR Mitigation Measure NOI-1: Construction Noise Control Plan for Nighttime Construction. Should construction be planned for the nighttime hours of 10:00 p.m. to 7:00 a.m. for any development under the Specific Plan within 500 feet of a residential land use (including the Phase I Development), the contractor(s) for each construction phase shall develop a construction noise control plan that demonstrates that noise from nighttime construction activities will comply with the City noise limit of 60 dBA at a distance of 100 feet, unless a permit is issued and approval is granted by the director of the City Public Works Department or his/her designee. Measures to help reduce noise from construction activity during nighttime hours to this level (or to the extent feasible) shall be incorporated into this plan and may include, but are not limited to, the following:
o Require stationary noise sources associated with construction (e.g., generators and compressors) in proximity to noise-sensitive land uses to be muffled and/or enclosed within temporary enclosures and shielded by barriers, which can reduce construction noise by as much as 5 dB.
o Require all construction equipment powered by gasoline or diesel engines and used during nighttime hours to have sound control devices that are at least as effective as those originally provided by the manufacturer and operated and maintained to minimize noise generation.
o Prohibit idling of inactive construction equipment for prolonged periods during nighttime hours (i.e., more than 2 minutes).
o Locate construction equipment as far as feasible from adjacent or nearby noisesensitive receptors. o Use noise-reducing enclosures around noise-generating equipment during nighttime hours.
o Prohibit the use of impact tools (e.g., jack hammers) during nighttime hours. o Use electric motors rather than gasoline- or diesel-powered engines to avoid noise associated with compressed air exhaust from pneumatically powered tools during 2023-2031 Housing Element Update 199 Initial Study
City of San Bruno December 2022 (Revised January 2023)
nighttime hours. Where the use of pneumatic tools is unavoidable, an exhaust muffler on the compressed air exhaust could be used; this muffler can lower noise levels from the exhaust by about 10 dB. External jackets on the tools themselves could be used, which could achieve a reduction of 5 dB.
o Ensure that equipment and trucks used for Project construction use the best available noise control techniques (e.g., improved mufflers, equipment redesign, intake silencers, ducts, engine enclosures, acoustically attenuating shields or shrouds). o For construction work that occurs at night, an alternative to high pitched, single-tone back up alarms shall be used. This could include a visual observer to provide warnings to the driver in the event that workers are present behind the vehicle or the use of a white noise alarm sound source.
o Any alternative approach must comply with all applicable safety regulations. o The City of San Bruno shall require a third-party inspector to be onsite during all nighttime construction work. The director of the City Public Works Department or his/her designee, based on the degree of construction, proximity to sensitive uses, or a noise complaint, may require the
o Project sponsor to monitor noise levels during nighttime construction activities. If this is required, a plan for noise monitoring and reporting must be provided to the Director of the City Public Works Department or his/her designee for review. o Should a reduction in construction noise to below the allowable 60 dBA level be deemed infeasible, the contractor shall coordinate with the Community and Economic Development
o Department to obtain a permit that allows the generation of nighttime construction noise in excess of 60 dBA. The permit shall include stipulations and restrictions with which the contractor(s) would be required to comply. The contractor(s) shall comply with all stipulations of the permit. One of the conditions of the permit shall be that interior noise levels at the nearest noise-sensitive uses resulting from nighttime construction shall not exceed 45 dBA, a commonly accepted threshold for sleep disturbance.

Since construction noise is expected to be below the applicable City limits during daytime hours, and construction activities would not be expected at night, daytime construction noise from the Housing Element Update would not result in a substantial temporary increase in noise levels that would be in excess of applicable local standards, resulting in a less-than-significant impact. (Less than Significant Impact)
2023-2031 Housing Element Update 200 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact NOI-2: The project would not result in generation of excessive groundborne vibration or groundborne noise levels. (Less than Significant Impact with Mitigation Incorporated)
Construction Vibration
Construction equipment such as pile drivers are known to generate substantial vibration levels that if used in the vicinity of sensitive land uses may expose persons to excessive vibration levels as well as have the potential to damage buildings. Other construction equipment such as bulldozers and vibratory rollers do not create the vibration levels of pile drivers; however, these types of equipment are more likely to operate continuously and closer to sensitive receptors, and they may expose persons to excessive vibration levels. Foundation construction techniques involving impact or vibratory pile driving equipment, which can cause excessive vibration, are not expected with the future development under the Housing Element Update. The severity of the vibration impact is determined by the proximity of the project with respect to buildings and receptors. The sensitivity of buildings is also an important factor in evaluating impacts due to groundborne vibration.

The California Department of Transportation recommends a vibration limit of 0.5 in/sec PPV to avoid damage to buildings that are structurally sound and designed to modern engineering standards, a vibration limit of 0.3 in/sec PPV for buildings that are found to be structurally sound but where structural damage is a major concern, and a vibration limit of 0.25 in/sec PPV for historic and some old buildings.

Construction details on each individual project are not currently known and, therefore, cannot be quantified.

Table 4.13-5 presents typical vibration levels that could be expected from construction equipment at a distances of 25 feet to 100 feet. Vibration levels would be higher at distances less than 25 feet and lower at distances greater than 100 feet. Vibration levels would also vary depending on soil conditions, construction methods, and equipment used. Vibration levels are highest close to the source, and then attenuate with increasing distance at the rate (Dref/D)1.1, where D is the distance from the source in feet and Dref is the reference distance of 25 feet.

Table 4.13-5: Vibration Source Levels for Construction Equipment Equipment PPV at 25 ft.
(in/sec)
PPV at 50 ft.
(in/sec)
PPV at 100 ft.
(in/sec)
Clam shovel drop 0.202 0.094 0.044
Hydromill (slurry
wall)
in soil 0.008 0.004 0.002
in rock 0.017 0.008 0.004
Vibratory Roller 0.210 0.098 0.046
2023-2031 Housing Element Update 201 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Table 4.13-5: Vibration Source Levels for Construction Equipment Equipment PPV at 25 ft.
(in/sec)
PPV at 50 ft.
(in/sec)
PPV at 100 ft.
(in/sec)
Hoe Ram 0.089 0.042 0.019
Large bulldozer 0.089 0.042 0.019
Caisson drilling 0.089 0.042 0.019
Loaded trucks 0.076 0.035 0.017
Jackhammer 0.035 0.016 0.008
Small bulldozer 0.003 0.001 0.001
Source: Illingworth & Rodkin, Inc. Housing Element Update Noise and Vibration Assessment. November 2022.

Table 4.13-6 summarizes the minimum safe setback distances to maintain in order to achieve the

0.25 in/sec PPV threshold for historical buildings and the 0.3 in/sec and 0.5 in/sec PPV thresholds for modern buildings.

Table 4.13-6: Vibration Source Levels for Construction Equipment and Minimum Safe Setbacks
Equipment
Minimum Safe
Setback (feet)

0.25 in/sec PPV
Minimum Safe
Setback (feet)

0.30 in/sec PPV
Minimum Safe
Setback (feet)

0.50 in/sec PPV
Clam shovel drop 21 18 11
Hydromill
(slurry wall)
in soil <1 <1 <1
in rock 3 2 2
Vibratory Roller 22 19 12
Hoe Ram 10 9 6
Large bulldozer 10 9 6
Caisson drilling 10 9 6
Loaded trucks 9 8 5
Jackhammer 5 4 3
2023-2031 Housing Element Update 202 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Small bulldozer <1 <1 <1
Source: Illingworth & Rodkin, Inc. Housing Element Update Noise and Vibration Assessment. November 2022.

Construction details on each individual development are not currently known and, therefore, cannot be quantified. It is conservatively assumed that the construction areas associated with these future developments could be located within the minimum safe setback distances identified in Table 4.13-6.

In the event that future housing development projects produce vibration levels exceeding the thresholds, construction vibration would be expected to cause both human annoyance and the possibility of cosmetic damage, resulting in a significant impact. Therefore, in order to determine whether future construction could result in significant groundborne vibration impacts, groundborne vibration studies would need to be prepared for each individual project completed under the Housing Element Update.

Mitigation Measures:

MM NOI-2.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites to implement the following measures during demolition and construction:
• Groundborne vibration studies shall be prepared by qualified professionals in accordance with industry-accepted methodology where heavy construction activities involving significant site grading, underground, or foundation work will occur within 25 feet of residential or other vibration sensitive uses. The industry-accepted methodologies include the recommended vibration assessment procedure and thresholds provided by public agencies such as Caltrans or the Federal Highway Administration. The studies should identify necessary construction vibration controls to reduce both human annoyance and the possibility of cosmetic damage. Controls shall include, but not be limited to, the following measures:
o A list of all heavy construction equipment to be used for this project known to produce high vibration levels (tracked vehicles, vibratory compaction, jackhammers, hoe rams, etc.) shall be submitted to the City by the contractor. This list shall be used to identify equipment and activities that would potentially generate substantial vibration and to define the level of effort for reducing vibration levels below the thresholds.
o Place operating equipment on the construction site as far as possible from vibration-sensitive receptors.
o Use smaller equipment to minimize vibration levels below the limits.
o Avoid using vibratory rollers and tampers near sensitive areas. o Select demolition methods not involving impact tools. 2023-2031 Housing Element Update 203 Initial Study
City of San Bruno December 2022 (Revised January 2023)
o Modify/design or identify alternative construction methods to reduce vibration levels below the limits.
o Avoid dropping heavy objects or materials.

With the implementation of mitigation measure MM NOI-2.1, future development under the Housing Element Update would be required to groundborne vibration studies and identify necessary construction vibration controls to reduce both human annoyance and the possibility of cosmetic damage. Additionally, vibration generated during construction at the TCP area sites would be further reduced with adherence to the mitigation measures identified in the TCP EIR, shown below. • TCP EIR Mitigation 11-3. Reduce ground-borne vibration levels during individual, sitespecific project demolition and construction periods by requiring applicant incorporation of conditions in individual discretionary project demolition and construction contractor agreements within the Transit Corridors Area that stipulate the following ground-borne vibration abatement measures:
o Restrict vibration-generating activity to between the hours of 7:00 a.m. and 5:00 p.m., Monday through Friday. Prohibit such activity on weekends and holidays. o Notify occupants of land uses located within 200 feet of proposed pile-driving activities of the project construction schedule in writing. o Investigate in consultation with City staff possible pre-drilling of pile holes as a means of minimizing the number of percussions required to seat the pile. o Conduct a pre-construction site survey documenting the condition of any historic structure located within 200 feet of proposed pile driving activities. o Monitor pile driving vibration levels to ensure that vibration does not exceed appropriate thresholds for the potentially affected building (5mm/sec or 0.2 inches/sec ppv for structurally sound buildings).

For these reasons, the project would not result in generation of excessive groundborne vibration or groundborne noise levels. (Less than Significant Impact with Mitigation Incorporated) Impact NOI-3: The project would not expose people residing or working in the project area to excessive noise levels. (Less than Significant Impact)
All of the Housing Opportunity Sites are located within AIA Area B of SFO and the associated ALUCP. As discussed in Section 4.13.1.1, residential land uses are considered conditionally compatible with noise levels between 65 and 70 dB CNEL, and generally incompatible with noise levels in excess of 70 dB CNEL. As shown on Figure 4.13-2, Housing Opportunity Sites 14, 15, 18, and 19, and 21 would be located within the 70-75 dB CNEL noise contour; the remaining sites are located outside of the boundary of the 70 dB CNEL noise contour and therefore would not be exposed to excessive noise levels.

Future residential development at Sites 14, 15, 18, and 19, and 21 would be required by the California Building Standards Code (Title 24), ALUCP (Policy NP-4) and San Bruno General Plan (Policy HS-35) to achieve an interior noise level of 45 dB CNEL or less. For residential structures 2023-2031 Housing Element Update 204 Initial Study
City of San Bruno December 2022 (Revised January 2023)
exposed to aircraft noise above CNEL 60 dB, Title 24, Part 2 of the California Building Standards Code requires an acoustical analysis is required to demonstrate compliance with this requirement.

Since Sites 15, 18, and 21 were zoned for residential use as of the effective date of the SFO ALUCP (November 8, 2012), future residential development at these sites is considered compatible with the SFO ALUCP and residents at these sites would not be exposed to excessive noise levels with adherence to the aforementioned regulations. Although Sites 14 and 19 are located in the 70-75 dB CNEL contour and development of housing on these sites would require a Local Agency Override of the ALUCP (refer to the discussion in Section 2.5.3), the Noise and Vibration Assessment (refer to Appendix B and the discussion under Impact NOI-3 in Section 4.13 of this Initial Study) determined that future residential development at Sites 14 and 19 would be able to achieve a 45 dB CNEL interior as required by Airport Land Use Compatibility Policy NP-4 and General Plan Policy HS-35.

Furthermore, Title 24 and General Plan Policy HS-35 would prohibit the issuance of occupancy permits for residential development that would expose future residents to an interior noise level of greater than 45 dB CNEL. Accordingly, the Housing Element Update’s incompatibility with the noise compatibility policies provided in the ALUCP would not result in the exposure of future residents of Sites 14 and 19 to excessive noise levels.

City of San Bruno
2023-2031 Housing Element Update 205 Initial Study
December 2022 (January 2023)
Noise Contour Source: Comprehensive Airport Land Use Compatibility Plan for the Environs of San Francisco International Airport, Rincondo Associates, November 2012.

Key to Boundaries
Key to Sites
Transit-Oriented Development Overlay
Bayhill Specific Plan Boundary
Large Site With One House (R-2)
Melody Toyota Lot
Melody Toyota Showroom
Office Building
Tanforan
Vacant Site
Vacant Site
Walgreens
Russo Dental
San Bruno Pet Hospital
Chili’s Restaurant
Vacant Site
Bedroom Express
San Bruno Gas
Prepared July 20, 2022
IHOP Restaurant
Former Edgemont ES
Former Budget Motel
Engvall MS
Citibank
Car Sales Lot
Bayhill Shopping Center
Bank of America
ATT Building
City Limits
0 0.25 0.5 1
Miles
N
65 65
70 75
75 70
65 HOUSING OPPORTUNITY SITES AND SFO 2020 NOISE EXPOSURE CONTOURS (DB, CNEL) FIGURE 4.13-2 2023-2031 Housing Element Update 206 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.14 POPULATION AND HOUSING

4.14.1 Environmental Setting

4.14.1.1 Regulatory Framework
State
Housing-Element Law
State requirements mandating that housing be included as an element of each jurisdiction’s general plan is known as housing-element law. The Regional Housing Need Allocation (RHNA) is the statemandated process to identify the total number of housing units (by affordability level) that each jurisdiction must accommodate in its housing element. California housing-element law requires cities to: 1) zone adequate lands to accommodate its RHNA; 2) produce an inventory of sites that can accommodate its share of the RHNA; 3) identify governmental and non-governmental constraints to residential development; 4) develop strategies and a work plan to mitigate or eliminate those constraints; and 5) adopt a housing element and update it on a regular basis.112 The City of San Bruno Housing Element and related land use policies were last updated on July 30, 2015.

Regional and Local
Plan Bay Area 2050
Plan Bay Area 2050 is the long-range plan for the nine-county San Francisco Bay Area that provides strategies that increase the availability of affordable housing, support a more equitable and efficient economy, improve the transportation network, and enhance the region’s environmental resilience.

Plan Bay Area 2050 promotes the development of a variety of housing types and densities within identified Priority Development Areas (PDAs). PDAs are areas generally near existing job centers or frequent transit that are locally identified for housing and job growth. 113
ABAG allocates regional housing needs to each city and county within the San Francisco Bay Area, based on statewide goals. These allocations are designed to lay the foundation for Plan Bay Area 2050’s long-term envisioned growth pattern for the region. ABAG also develops a series of forecasts and models to project the growth of population, housing units, and jobs in the Bay Area. ABAG, MTC, and local jurisdiction planning staff created the Forecasting and Modeling Report, which is a technical overview of the of the growth forecasts and land use models upon which Plan Bay Area 2050 is based.

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating population and housing impacts resulting from planned development within the City, including the following:
112 California Department of Housing and Community Development. “Regional Housing Needs Allocation and Housing Elements” Accessed October 24, 2022. https://www.hcd.ca.gov/planning-and-communitydevelopment/housing-elements 113 Association of Bay Area Governments and Metropolitan Transportation Commission. Plan Bay Area 2050.

October 21, 2021.
2023-2031 Housing Element Update 207 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
LUD-F Promote infill and revitalization of the city’s shopping centers – including the continued improvement of The Shops at Tanforan and Towne Center – to attract shoppers from throughout the region using convenient BART and Caltrain access.

LUD-20 Promote establishment of strong regional retail anchors in The Shops at Tanforan and Towne Center. Support the further redevelopment and expansion of The Shops at Tanforan, and work with the developer and San Bruno Chamber of Commerce to market the center to a wider regional audience.

LUD-21 Strengthen the identity of the existing internal “street” network in The Shops at Tanforan and Towne Center. Encourage transition of these two centers into an outdoor/indoor shopping “district,” as illustrated in Figure 2-6. Implement the following design techniques:
• Promote reuse and infill of existing surface parking lots. • Strengthen the existing internal street network (as shown in the concept diagram) to promote walkability between stores, services, and restaurants. • Ensure that the street network links the two shopping centers and preserves the visibility of the existing shopping complexes from El Camino Real. • Design all new commercial spaces to be located and oriented toward the walkable internal streets and toward Sneath Lane, with clear connections to enclosed mall entrances.
• Create fluid and visible pedestrian connections to and from the San Bruno BART Station.
• In accordance with Ordinance 1284, consider construction of necessary parking structures to replace existing surface parking lots. Locate parking structures along the edges of the shopping district to minimize vehicular traffic on internal pedestrian-oriented streets.
• Improve landscaping along El Camino Real to differentiate and announce the “district” from other developments along El Camino Real. • Incorporate gateway features on El Camino Real near the northern edge of Towne Center where San Bruno’s northern boundary exists.
• Develop a uniform signage plan to coordinate signs along the internal shopping streets with signs along El Camino Real.
• Coordinate with the San Bruno Chamber of Commerce to market the new “district” as a regional marketplace.

LUD-80 Amend zoning districts and development standards in the Zoning Ordinance consistent with land use classifications in the General Plan, particularly as it relates to mixed-use development along El Camino Real, the Transit Oriented Development district, and intensification within the Tanforan District.

4.14.1.2 Existing Conditions
According to the California Department of Finance, the City of San Bruno had a population of 42,656 as of January 1, 2022, a 1.18 percent decrease from the previous year.114 ABAG projects the City’s population will be 51,370 by 2040.115 As of 2022, there were 16,696 households with an 114 California Department of Finance. “E-1 Population Estimates for Cities, Counties, and the State – January 1, 2021 and 2022.” Accessed August 4, 2022. https://dof.ca.gov/forecasting/demographics/estimates/e-5-populationand-housing-estimates-for-cities-counties-and-the-state-2020-2022/ 115 Association of Bay Area Governments. Projections 2040, A Companion to Plan Bay Area 2040. November 2018. 2023-2031 Housing Element Update 208 Initial Study
City of San Bruno December 2022 (Revised January 2023)
average of 2.64 persons per household.116 None of the Housing Opportunity Sites are developed with housing.

4.14.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Induce substantial unplanned population
growth in an area, either directly (for example,
by proposing new homes and businesses) or
indirectly (for example, through extension of
roads or other infrastructure)?
2) Displace substantial numbers of existing
people or housing, necessitating the
construction of replacement housing
elsewhere?
Impact POP-1: The project would not induce substantial unplanned population growth in an area, either directly (for example, by proposing new homes and businesses) or indirectly (for example, through extension of roads or other infrastructure). (No Impact)
As discussed in Sections 3.1.2 and 3.1.3, state law requires local jurisdictions to update their respective housing elements to account for their regional housing needs allocation. The City of San Bruno’s fair share of the regional housing need for 2023 to 2031 was calculated as 3,165 housing units. Factoring in HCD’s recommendation to create a buffer in the housing element inventory of at least 15 percent (equivalent to 475 units) in accordance with the No Net Loss Law, state and regional plans intend for San Bruno to construct an additional 3,640 housing units (refer to Table 3.1-1), which corresponds to an additional 9,610 residents by the year 2031.117 Buildout of the Housing Opportunity Sites (refer to Table 3.2-1) identified in the Housing Element Update would result in an additional 2,709 units, which corresponds to an additional 7,152 residents by the year 2031.118 All of the Housing Opportunity Sites with the exception of Site 14 are designated/zoned for residential uses under the City’s General Plan and Municipal Code. The remaining regional housing needs allocation would be satisfied through the construction of 669 units 116 United States Census Bureau. Quick Facts, San Bruno city, California. Accessed October 24, 2022. https://www.census.gov/quickfacts/fact/table/sanbrunocitycalifornia/PST040219#qf-flag-X 117 3,640 housing units multiplied by 2.64 (average number of residents per unit in San Bruno) equals 9609.6. 118 2,708 housing units multiplied by 2.64 (average number of residents per unit in San Bruno) equals 7,149.12. 2,709 units multiplied by 2.64 equals 7,151.76. After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study.
2023-2031 Housing Element Update 209 Initial Study
City of San Bruno December 2022 (Revised January 2023)
that have already received discretionary entitlements and 240 ADUs that are allowed by right under the Municipal Code. In total, buildout of the Housing Element Update would result in the construction of 3,618 housing units, which corresponds to an additional 9,552 residents.119 All of the Housing Opportunity Sites are currently designated for residential development in the General Plan, with the exception of Site 14. Redevelopment of Site 14 with up to 1,000 housing units (equivalent to an additional 2,640 residents) is consistent with General Plan policies LUD-F, LUD20, LUD-21, and LUD-80 (refer to Section 4.14.1.1), which call for mixed-use infill redevelopment of the Shops at Tanforan. Therefore, implementation of the Housing Element Update would not induce substantial unplanned population growth.

Impact POP-2: The project would not displace substantial numbers of existing people or housing, necessitating the construction of replacement housing elsewhere. (No Impact)
None of the Housing Opportunity Sites are developed with housing; therefore the Housing Element Update would not displace substantial numbers of existing people or housing necessitating the construction of replacement housing elsewhere.
119 3,618 housing units multiplied by 2.64 (average number of residents per unit in San Bruno) equals 9,551.52. 2023-2031 Housing Element Update 210 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.15 PUBLIC SERVICES

4.15.1 Environmental Setting

4.15.1.1 Regulatory Framework
State
Government Code Section 66477
The Quimby Act (included within Government Code Section 66477) requires local governments to set aside parkland and open space for recreational purposes. It provides provisions for the dedication of parkland and/or payment of fees in lieu of parkland dedication to help mitigate the impacts from new residential developments. The Quimby Act authorizes local governments to establish ordinances requiring developers of new residential subdivisions to dedicate parks, pay a fee in lieu of parkland dedication, or perform a combination of the two.

Government Code Section 65995 through 65998
California Government Code Section 65996 specifies that an acceptable method of offsetting a project’s effect on the adequacy of school facilities is the payment of a school impact fee prior to the issuance of a building permit. Government Code Sections 65995 through 65998 set forth provisions for the payment of school impact fees by new development by “mitigating impacts on school facilities that occur (as a result of the planning, use, or development of real property” (Section 65996[a]). The legislation states that the payment of school impact fees “are hereby deemed to provide full and complete school facilities mitigation” under CEQA (Section 65996[b]).

Developers are required to pay a school impact fee to the school district to offset the increased demands on school facilities caused by the proposed residential development project. The school district is responsible for implementing the specific methods for mitigating school impacts under the Government Code.

Regional and Local
County of San Mateo Trails Master Plan
Adopted in 2001, the County of San Mateo Trails Master Plan is intended to, among other objectives, provide policies and guidelines for trails planning and to define environmental issues and mitigation measures for trail management.

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating impacts on public services resulting from planned development within the City including the following:

Policies Description
HS-1 Regulate development, including remodeling or structural rehabilitation, to assure adequate mitigation of safety hazards on sites having a history or threat of slope instability, erosion, 2023-2031 Housing Element Update 211 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
subsidence, seismic dangers (including those resulting from liquefactions, ground failure, ground rupture), flooding, and/or fire hazards (Figure 7-2).

HS-2 Review and revise the City’s Building Code, Zoning Ordinance, and Subdivision requirements to safeguard against seismic, geologic, and safety hazards. Mitigation should include:
• Minimal grading and removal of natural vegetation to prevent erosion and slope instability.
• Cleared slopes should be replanted with vegetation.
• Proper drainage control to prevent erosion of the site and affected properties. Careful siting and structural engineering in unstable areas.
• Consideration of flooding and fire hazards in siting and designing new development.

LUD-76 Assure that new development mitigates impacts on existing public services, including transit services, water, sewer, and storm drainage systems, police and fire protection, libraries, and parks and recreation facilities.

OSR-1 Maintain a parkland dedication/in lieu fee standard of 4.5 acres/1,000 residents.

OSR-2 Amend the City’s Zoning Ordinance to ensure that all developments are subject to dedication/in lieu fee requirements, whether or not such developments result from subdivision.

OSR-3 Revise the City’s Park In-Lieu Fee to create an option (at the City’s discretion) to accept either Park In-Lieu Fees or require the developer to design/build parks and/or recreation facilities as part of the development.

OSR-4 Undertake a program to add 20 acres of parkland to the City system over the next 20 years.

Seize all opportunities to develop and/or maintain parks and recreation facilities within existing residential neighborhoods through acquisition or preservation of former school facilities.

OSR-5 Strive to locate neighborhoods park facilities within 1/3-mile walking distance of all residences in San Bruno. If limited in some neighborhoods, coordinate with local school districts to allow use of playgrounds and sports facilities after school hours.

OSR-6 Provide small public parks and/or plazas within BART and Caltrain station areas, within Downtown, and along El Camino Real. Provide benches, water fountains, and trees to serve as resting areas for pedestrians, commuters, and shoppers.

OSR-7 As former Skyline College properties are developed for single-family residential neighborhoods, create an option (at the City’s discretion) for development of parks and/or recreation facilities to serve San Bruno residents.

OSR-9 Actively implement the City’s Comprehensive Parks and Recreational Facilities Master Plan, which more fully identifies park and recreation needs and deficiencies.

OSR-10 Continue coordination with San Bruno Park School District (per the Five-Year Joint Use Agreement, 2002) to allow joint use of school facilities for after-school programs, sports leagues, and non-organized play.

OSR-12 Study potential locations and funding mechanisms for the development of a Teen Recreation Center that provides the types of programs and activities to successfully attract the City’s teens.
2023-2031 Housing Element Update 212 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
OSR-13 Design and construct non-traditional recreation facilities (skateboarding/BMX bike park, rock climbing wall, etc) to provide alternative forms of recreation for the City’s teens.

Coordinate this facility with the Parks and Recreation Commission.

OSR-14 Continue to support and expand adult (50+) programs and activities offered at the Senior Center. Develop plans to expand the facility as needed to accommodate the City’s senior population.

OSR-15 Study potential sites and funding mechanisms for relocation of the San Bruno Swim Center, or development of a new multi-programmed Aquatics Facility.

PFS-3 Require, as part of plan review, identification of needed public service improvement and maintenance costs for those projects that may have a significant impact on existing services.

PFS-5 Develop a Civic Center Complex Master Plan, in order to coordinate rehabilitation and expansion of the various City departments and service providers.

PFS-26 Ensure adequate staffing and facilities for the City’s Police and Fire Departments to achieve desired levels of service, particularly surrounding transit areas and along urban-interface hazard areas.

PFS-27 Consider rebuilding or rehabilitating Fire Station No. 51 to accommodate current and future Fire Department needs, Americans with Disabilities Act standards, and seismic requirements.

The new Fire Station could include a community meeting room.

PFS-28 Consider relocating Fire Station No. 52 to a safe site outside of the San Andreas Earthquake Fault Zone. Maintain existing or better levels of service to neighborhoods in the northern and western neighborhoods.

PFS-29 Establish a separate radio channel for use by city crews and firefighters during emergencies.

Obtain funding for information technology systems, such as wireless communication systems, to further decrease fire and police response times.

PFS-30 Require installation and maintenance of fire protection measures in high-risk and urbaninterface areas (Figure 8-2):
• Proper siting and access;
• Brush clearance (non-fire resistant landscaping 50 feet from structures); • Use of fire resistive materials (pressure-impregnated, fire resistive shingles or shakes);
• Landscaping with fire resistive species; and
• Installation of early warning systems (alarms and sprinklers).

PFS-31 Ensure adequate fire water pressure as a condition of approval for all new development projects.

PFS-32 Require installation of residential sprinklers in areas with steep slopes and/or diminished access.

PFS-33 Consider the feasibility of establishing a Fire Risk Assessment Zone within and surrounding high-risk and urban-interface areas (Figure 8-2).

PFS-34 Identify and remove mature and/or diseased Eucalyptus trees in rights-of-way and other open areas, if they pose a fire hazard or other threat to health and safety. 2023-2031 Housing Element Update 213 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
PFS-35 Require installation of automatic sprinkler systems in all hotel, motel, and other overnight lodging facilities, in mixed commercial/residential uses, and in apartment buildings of three or more units.

PFS-37 Continue to clear fire hazardous materials from Crestmoor Canyon that pose a threat to nearby residents. Care should be taken to prevent unnecessary harm to healthy vegetation.

Ensure continued use by the Fire Department should the existing fire road be transitioned to a multi-use trail.

PFS-38 Ensure proper maintenance of the open space areas in western residential neighborhoods.

Vegetation maintenance is necessary to prevent potential fire hazards.

PFS-39 Minimize risks to single-access residential neighborhoods by providing alternative access for fire and other emergency personnel.

PFS-40 Acknowledge the regional implications of natural hazards and the need for jurisdictional cooperation in the face of potential disasters. Coordinate emergency response planning with surrounding cities, agencies, and San Mateo County Office of Emergency Services.

PFS-41 Create and maintain an up-to-date Emergency Operations Plan with information including but not limited to evacuation routes and procedures, chain of command communication structure, alerts and warning systems, emergency shelter provisions, and responsibilities and instructions for all relevant departments (police, fire, hazardous materials, emergency medical services, public works).

PFS-42 Conduct emergency drills in public buildings, large office developments, and in coordination with local schools. Hold post-drill training seminars to identify needed improvements to emergency preparedness.

PFS-43 Work with critical use facilities (i.e., hospitals, schools, public assembly facilities, transportation services) to assure that they can provide alternate sources of electricity, water, and sewage disposal in the event that regular utilities are interrupted in a disaster.

PFS-44 Establish a public education program through local schools, county fair, civic organizations, and other service groups to distribute information about emergency preparedness. Develop a brochure indicating what to do and where to go in the event of safety, seismic, or emergency events.

PFS-45 Continue to participate in a cooperative San Mateo County program to pool natural hazard data which are developed either through special studies or via the plan review process.

PFS-46 Coordinate with regional, State, and federal agencies to determine appropriate disaster recovery strategies for after a major natural or man-made event. Publicize recovery measures along with emergency preparedness information.

PFS-50 Develop a primary Emergency Operations Center and a secondary Emergency Operations Center for the management and coordination of disasters in our community.

PFS-51 Work cooperatively with local school districts to monitor the growth of the school-age population within the San Bruno, and the subsequent need for school sites and facilities.

PFS-52 Provide technical assistance to local school districts in design and planning for reuse of former school sites throughout the City. Consider acquisition or leasing of former school sites for recreation, education, or other community needs. 2023-2031 Housing Element Update 214 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
PFS-53 Maintain good communication with the local school districts, and integrate school facilities planning with the City’s objectives, including:
• Designing school facilities to allow safe pedestrian and bicycle access; • Ensuring construction of traffic calming measures on surrounding streets; • Designing attractive facilities that contribute to neighborhood identity and pride; and • Allowing public use of recreational facilities on school sites on evenings and weekends.

PFS-55 Provide a wide range of library services to San Bruno residents through a strong main Public Library facility.

PFS-56 Study potential locations and funding mechanisms for development of a larger Public Library facility. Focus on sites within the Civic Center complex, as recommended by the Ad Hoc Library Citizens Committee.

PFS-57 Continue San Bruno’s relationship with Skyline College by coordinating collections and sharing resources through their common partnership with the Peninsula Library System.

PFS-58 Continue to provide public access to the Internet and other computer-based resources through the San Bruno Public Library facility.

PFS-59 In order to prevent anticipated future population growth in San Bruno from burdening existing over-extended library services, City staff will ensure upon individual project review that the developer sets aside contributions or in-lieu fees in general proportion to the burden proposed new residential development would have on the library system, and that those fees are used to improve public library facilities. The per capita share will be negotiated between the Ad Hoc Library Citizen’s Committee, City Staff, and City Council, within 1 year of Plan adoption, and will be applied uniformly (and if necessary, retroactively) across all residential development occupancy permit applications submitted after Plan adoption, until such time as an alternative form of support is provided, or the library facilities are fully upgraded to the requirements as described on pages 8-12.

City of San Bruno Municipal Code
Pursuant to Section 10.15.050 of the City’s Municipal Code, all facilities with fire suppression systems are required to meet certain technical specifications, including having an approved backflow prevention assembly with a double check valve. The ordinance also requires fire protection systems to be constructed with approved potable water piping and material. Section 11.24.010 requires project to comply with the 2019 California Fire Code and 2019 International Fire Code. As established by Municipal Code Section 12.44, the City maintains a parkland dedication/in-lieu fees standard of 4.5 acres per 1,000 residents.

Pursuant to Section 12.260 of the City’s Municipal Code, the City assesses fees upon development projects to fully or partially offset the costs of public facilities and infrastructure that is needed to serve new demand created by development projects. Effective July 1, 2022, the development impact fee is $29,494.53 per single-family residential unit and $27,083.16 per multi-family residential unit.120
120 City of San Bruno. FY2022-23 Master Fee Schedule. July 2022. 2023-2031 Housing Element Update 215 Initial Study
City of San Bruno December 2022 (Revised January 2023)
City of San Bruno Development Impact Fees Nexus Study
The City of San Bruno prepared the San Bruno Development Impact Fee Nexus Study designed to provide the City of San Bruno with the necessary technical documentation in order to adopt a comprehensive development impact fee program. As discussed in the nexus study, development impact fees are one-time charges on new development projects that are collected and used by jurisdictions to cover the cost of capital facilities and infrastructure needed to serve the new residential and development growth. Impact fees are regulated by Assembly Bill (AB) 1600 (Government Code Section 66000 et seq.). The purpose of the nexus study is to determine the maximum allowable fees that the City can charge for facilities and infrastructure consistent with the legal requirements of AB 1600. Fees collected under AB 1600 are to be collected for capital facility and infrastructure improvements only, used to fund facility needs created by new development rather than existing deficiencies, and the fees are to be based on a rational nexus between new development and the costs of the capital facilities and infrastructure needed to accommodate such development.

4.15.1.2 Existing Conditions
Fire Protection Services
Fire protection services are provided by the San Bruno Fire Department (SBFD), which employs 32 full-time firefighters and five administrative and support staff employees operating out of two fire stations.121 Station 51 is located on the south side of the City Hall complex at 555 El Camino Real and covers the area east of Interstate 280. Station 52 is located near the intersection of Sneath Lane and Earl Avenue at 1999 Earl Avenue and responds to emergency calls west of I-280. A Community Risk Assessment prepared for the SBFD in October 2022 determined that the general condition of both fire stations was poor and in need of replacement; the assessment also recommended relocating Station 52 to a vacant lot at the northwest corner of the San Bruno Avenue and Glenview Drive intersection. The SBFD currently has an average “call received to first unit arrival” response time of seven minutes and 36 seconds, which is below the National Fire Protection Association (NFPA) performance goal of six minutes and 30 seconds. The Community Risk Assessment also identified staffing deficits during high-rise structure fire, motor vehicle accident, and trench rescue events.

The SBFD is also subject to the San Mateo County Joint Powers Agreement (JPA), which requires that the closest available paramedic engine company respond to calls for emergency medical service, and the closest available engine and truck company respond to fire calls. In addition, a full assignment response such as a fire, fire alarm, or other type of call, which would necessitate a large response, requires three engines; therefore an additional engine would need to come from a neighboring jurisdiction in an event requiring a full assignment response. 121 San Bruno Fire Department/AB Triton Consulting. Community Risk Assessment: Standards of Cover & Deployment Analysis. October 2022.
2023-2031 Housing Element Update 216 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Housing Opportunity Site 6 is serviced by Station 52; the remaining Housing Opportunity Sites are served by Station 51.

Police Protection Services
Police protection services are provided by the San Bruno Police Department (SBPD). Police headquarters are located at 1177 Huntington Avenue and share the facilities with BART police.

SBPD employs 48 sworn officers (equivalent to 11 officers for every 10,000 residents) who provide police services and public safety dispatching to the City of San Bruno.122 SBPD deploys officers in a beat management system, which divides the City into four beats; as shown on Figure 4.15-1, Beat One encompasses Housing Opportunity Sites 7, 14, 15, 18, 19, and 21; Beat Two encompasses Sites 2, 4, 5, 8, 9, 10, 11, 12, 16, 17, 22, and 23; Beat Three encompasses Site 6; Beat Four encompasses Sites 1, 3, 13, and 20.

The San Bruno Development Impact Fee Nexus Study (refer to Section 4.15.1.1) identified the need for specific upgrades and additions to help the Police Department serve new growth in the City.

These include the expansion of the Evidence Room at a cost of $650,000, upgrades to the Dispatch Center at a cost of $700,000, the creation of a satellite police substation at a cost of $30,000, upgrades to surveillance and tracking technology at a cost of $525,000, and the replacement of police vehicles at a cost of $4,075,983.

Schools
Four public school districts serve San Bruno residents: San Bruno Park School District (SBPSD), Millbrae Elementary School District (MESD), South San Francisco Unified School District (SSFUSD), and the San Mateo Union High School District (SMUHSD). SBPSD, MESD, and SSFUSD serve grades K through eight; SMUHSD serves grades nine through 12.

None of the Housing Opportunity Sites are in the SSFUSD service area. Within the SBPSD service area, Sites 1, 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, and 23 are served by Allen Elementary, located at 875 Angus Avenue West in San Bruno. Site 6 is served by Rollingwood Elementary, located at 2500 Cottonwood Drive in San Bruno. Within the MESD school district, Sites 10 and 16 are served by Lomita Park Elementary, located at 200 Santa Helena Avenue in San Bruno.

Within the SMUHSD service area, Sites 10 and 16 are served by Mills High School, located at 400 Murchison Drive in Millbrae; the remaining Housing Opportunity Sites are served by Capuchino High School, located at 1501 Magnolia Drive in San Bruno. 122 San Bruno Police Department. San Bruno General Plan Draft Environmental Impact Report. December 2008.

CITY OF SAN BRUNO POLICE BEAT AND AREA MAP FIGURE 4.15-1 2023-2031 Housing Element Update
City of San Bruno
217 Initial Study
December 2022 (Revised January 2023)
2023-2031 Housing Element Update 218 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Enrollment in SBPSD schools has been steadily declining, with enrollment numbers declining by approximately 23.4 percent between 2015 and 2021.123 Rollingwood Elementary is scheduled to close in June 2023; the SBPSD is currently in the process of redrawing school attendance boundaries to distribute the students that attend Rollingwood Elementary to the remaining four SBPSD schools for the 2023-2024 school year.124 Enrollment at MESD schools declined by approximately 12.6 percent between 2015 and 2021.125 Conversely, enrollment at SMUHSD schools increased by approximately 11.9 percent, although enrollment numbers at Mills High School and Capuchino High School have remained relatively constant, with a net change of minus 42 students and minus four students, respectively.[126][127][128]
Parks
San Bruno currently provides its residents with a total of 71 acres of city parkland. There are five small pocket parks, 12 neighborhood parks, and one large community park. The Parks and Recreation Services Department maintains all developed municipal park sites, street medians, and landscaping (including approximately 128 acres of open space and 7,250 trees) along San Mateo Avenue and at other City facilities. In addition to City parks, local recreation centers, school facilities, and a 108-acre regional park – San Mateo County’s Junipero Serra Park – provide recreational opportunities for San Bruno residents. Hiking and cycling trails are located west of the City boundary within the Golden Gate National Recreation Area and the San Francisco Peninsula Watershed, accessible from Sneath Lane and San Bruno Avenue. San Bruno City Park, Grundy Park, and Lion’s Field are the City’s most utilized parks.

As noted in Section 4.15.1.1, the City maintains a parkland standard of 4.5 acres per 1,000 residents.

The existing park acreage in the City is 199 acres (71 acres of City parkland plus Junipero Serra Park), which based on the existing population of 42,656 residents, equates to 4.66 acres per 1,000 residents.129
123 California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, San Bruno Park Elementary Report 41-69013”. Accessed November 14, 2022. https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=4169013&agglevel=district&year=2021-22 124 San Bruno Park School District. “New Attendance Boundary Info”. Accessed November 14, 2022. https://www.sbpsd.org/page/new-attendance-boundary-info 125 California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, Millbrae Elementary Report 41-68973”. Accessed November 14, 2022. https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=4168973&agglevel=district&year=2021-22 126 California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, San Mateo Union High Report 41-69047”. Accessed November 14, 2022.
https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=4169047&agglevel=district&year=2021-22 127 California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, Mills High Report 41-69047-4134557”. Accessed November 14, 2022.
https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=41690474134557&agglevel=school&year=2021- 22 128 California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, Capuchino High Report 41-69047-4130738”. Accessed November 14, 2022.
https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=41690474130738&agglevel=school&year=2021- 22 129 42,656 divided by 1,000 equals 42.656; 199 acres divided by 42.656 equals 4.665. 2023-2031 Housing Element Update 219 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Other Public Facilities
The San Bruno Public Library is located off El Camino Real adjacent to City Hall at 701 Angus Avenue W. A member library of the Peninsula Library System, the San Bruno Public Library provides children and adult programming as well as Spanish and Japanese language materials, and has over 120,000 circulating items including books, magazines, videos, DVDs, CDs, and books on tape and CD.

There are four different recreation centers in San Bruno: the Belle Air Community Center, the Veterans Memorial Recreation Center, the San Bruno Senior Center, and the Portola Performing Arts Center.

4.15.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project result in substantial adverse
physical impacts associated with the provision of
new or physically altered governmental facilities,
need for new or physically altered governmental
facilities, the construction of which could cause
significant environmental impacts, in order to
maintain acceptable service ratios, response times,
or other performance objectives for any of the
public services:
1) Fire Protection?
2) Police Protection?
3) Schools?
4) Parks?
5) Other Public Facilities?
Public services are provided to the community as a whole, usually from a central location or from a defined set of nodes. The resources base for delivery of the services, including the physical service delivery mechanisms, is financed on a community-wide basis, usually from a unified or integrated financial system. The service delivery can be provided by a city, county, service, or other special district. Usually, new development will create an incremental increase in the demand for these services. The amount of the demand will vary widely, depending on both the nature of the development (residential vs. industrial, for instance) and the type of services, as well as on the specific characteristics of the development (such as senior housing vs. family housing).

The impact of a particular project on public services and facilities is generally a fiscal impact. By increasing the demand for a type of service, a project could cause an eventual increase in the cost of providing the service (more personnel hours to patrol an area, additional fire equipment needed to service a tall building, etc.). CEQA requires analysis of fiscal impacts to the extent that increased demand triggers the need for a new facility (such as a school or fire station), since the new facility would have physical effects on the environment.
2023-2031 Housing Element Update 220 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact PS-1: The project would not result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for fire protection services. (Less than Significant Impact) As noted in Section 4.15.1.2, the SBFD is currently not meeting staff service ratios and response time performance objectives, and both stations are in need of replacement. Additionally, the Community Risk Assessment recommended relocating Station 52 from its current location at 1999 Earl Avenue approximately 2,275 feet to the south to a vacant lot located at the northwest corner of the San Bruno Avenue and Glenview Drive intersection.

Redevelopment of the Housing Opportunity Sites would add substantial population to the City which is expected to increase demand for fire protection services. Demand for fire protection services at the sites would be reduced with mandatory adherence to General Plan and Municipal Code policies and requirements identified in Section 4.15.1.1 by future development projects. As shown on Figure

4.20-1, Site 6 is located within a Wildland Fire Hazard Area, and Sites 3 and 14 are partially within a Wildland/Urban Interface Area. Accordingly, Sites 3, 6, and 14 would be required to comply with General Plan Policy PFS-30, which would require the installation and maintenance of a variety of fire protection measures, thus reducing site-specific demand generated by redevelopment of these sites.

Payment of development impact fees and taxes by future development would contribute to the replacement of Station 51 and the potential construction of a new Fire Station 52 at the vacant lot located at the northwest corner of the San Bruno Avenue/Glenview Drive intersection. As noted above, the need for new or physically altered fire stations exists and would not be a direct result of the Housing Element Update.

While the specific details of any future alterations or replacement of Station 51 are not currently known, replacement of Station 51 is anticipated to be found categorically exempt under CEQA Guidelines Section 15302, given that it would involve the replacement of an existing facility on the same site with fundamentally the same purpose and capacity as the structure replaced, and none of the exceptions identified in Section 15300.2 appear to be present. Future project-level CEQA review would be required to replace Fire Station 51, but it is not foreseeable at this time that any significant impacts would result that would not be adequately addressed through standard requirements and measures regularly imposed on new development.

Prior to the demolition of Station 52, all ACMs, lead-based paint, and PCBs would be removed in accordance with Section 19827.5 of the California Health and Safety Code, BAAQMD regulations (specifically Regulation 11, Rule 2, Hazardous Materials; Asbestos Demolition, Renovation and Manufacturing) and Cal/OSHA requirements (refer to Section 4.9.1.1). Construction of a new fire station at the vacant lot located at the northwest corner of the San Bruno Avenue and Glenview Drive intersection is not anticipated to result in any significant environmental effects that cannot be mitigated, given that:
2023-2031 Housing Element Update 221 Initial Study
City of San Bruno December 2022 (Revised January 2023)
• Fire stations are generally a low-impact land use in terms of vehicle trips, emissions, consumption of resources (electricity, natural gas, gasoline, water) and generation of waste, hazardous materials and emissions, ground disturbance, and noise and vibration; • Fire Stations are commonly located adjacent to sensitive receptors (as the current Station 52 is);
• The existing height limitation imposed by Ordinance 1284 and a corresponding modest building footprint and size;
• The absence of any agricultural/forestry resources, special-species habitat (refer to Figure

4.4-1), historic buildings (refer to Figure 4.5-2), geological and soil concerns (refer to Figure

4.7-1), soil contamination130, and waterways (refer to Figure 4.10-1). • Consistent with the findings of the Community Risk Assessment, construction of a new fire station would improve response times, thereby resulting in a beneficial impact on fire protection services.

Both the replacement of Station 51 and relocation of Station 52 would be subject to project-level environmental review once specific station plans have been set forth and funds have been allocated.

Based on the aforementioned reasons, it is anticipated that the new or altered stations would either be found categorically exempt or, if deemed ineligible for categorical exemption, that any potentially significant impacts identified can be reduced to a less than significant level through mitigation, thereby resulting in a mitigated negative declaration. For the reasons stated above, implementation of the Housing Element Update would not result in substantial adverse physical environmental impacts associated with the provision of new or physically altered fire protection facilities in order to maintain acceptable service ratios, response times, or other performance objectives.

Impact PS-2: The project would not result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for police protection services. (Less than Significant Impact) As documented in Section 4.15.1.2, the SBPD is currently providing 11 officers for every 10,000 residents; the City’s target service ratio is to meet the national average of 16.6 officers for every 10,000 residents. Additionally, the City of San Bruno Development Impact Fees Nexus Study (refer to Section 4.15.1.1) determined that renovations to the existing police headquarters were necessary in order to serve projected growth in the City.

Redevelopment of the Housing Opportunity Sites would substantially increase the City’s population, which is expected to increase demand for police protection services in comparison with the existing development at these sites. The renovations identified in the nexus study, which include the expansion of the Evidence Room and upgrades to the Dispatch Center, would not require substantial construction or result in a change of use or intensity of operations that could have an environmental 130 California Environmental Protection Agency. “Cortese List Data Resources.” Accessed November 15, 2022. https://calepa.ca.gov/sitecleanup/corteselist/.
2023-2031 Housing Element Update 222 Initial Study
City of San Bruno December 2022 (Revised January 2023)
impact. The nexus study also identified the need for a satellite police substation at a cost of $30,000, which would involve the setup of a small portable building on a yet to be determined site. No construction activity would be required to install the portable building, and due to its small size and intended use, operation of the police substation is not anticipated to incur any potentially significant impacts. Project-level review of the police substation would be required once a specific plan has been proposed, and is anticipated to either be categorically exempt or eligible for a Negative Declaration, and therefore would not result in any significant environmental impacts.

Payment of development impact fees and taxes by future development would contribute to the completion of the improvements to the police headquarters and installation of the police substation identified in the nexus study. These actions would require subsequent project-level analysis, and for the aforementioned reasons are not anticipated to result in any significant environmental impacts. For the reasons stated above, implementation of the Housing Element Update would not result in substantial adverse physical environmental impacts associated with the provision of new or physically altered police facilities in order to maintain acceptable service ratios, response times, or other performance objectives.

Impact PS-3:

The project would not result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for schools. (Less than Significant Impact)
As discussed in Section 4.14.2 under Impact POP-1, buildout of the Housing Element Update would result in the construction of an additional 3,618 housing units. Of these 3,618 housing units, 669 units are associated with pipeline projects which have already undergone review of their impacts to school facilities and have paid or will pay their development impact fees, and 240 units are ADUs, which are not anticipated to generate significant numbers of students and whose location is undetermined at this time, and therefore their respective school district is not reasonably foreseeable.

Sites 10 and 16 would be the only sites to generate students at Lomita Park Elementary, Taylor Middle, and Mills High, and given that these sites would be redeveloped under the project with only four single-family residences, would not result in substantial adverse effects on these facilities.

Of the remaining 2,704 housing units, this analysis assumes that the project would result in the construction of 134 single-family units and 2,570 multi-family units.[131][132] Using the SBPSD “single-family detached” and “multi-family” student generation rates for elementary and middle school students, buildout of these 2,704 units would generate 204 elementary and middle school 131 Based on an assumption that Sites 6 and 8 would be developed with single-family units, and the remaining sites would be developed with multi-family units. 132 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study. 2023-2031 Housing Element Update 223 Initial Study
City of San Bruno December 2022 (Revised January 2023)
students total.133 Using the SMUHSD “single-family residential” and “multi-family” student generation rates, buildout of the 2,704 units would generate 143 high school students at Capuchino High.134
As documented in Section 4.15.1.2, enrollment in the SBPSD declined from 2,727 students to 2,087 students (minus 640 students) between 2015 and 2021, which is greater than the number of students that would be generated by Housing Opportunity Sites (204 students) within the SBPSD service area.

Accordingly, the increase in enrollment generated by the Housing Element Update is not anticipated to exceed the available capacities of the SBPSD facilities such that new or expanded facilities would be required. Further, consistent with Government Code Sections 65995 through 65998 (refer to Section 4.15.1.1 Regulatory Framework), school impact fees will be paid to the affected school districts prior to the issuance of a building permit by the City. These funds would be used by SBPSD to accommodate additional students, and support the reopening of Rollingwood Elementary, if necessary.

Conversely, enrollment in the SMUHSD increased from 8,626 students to 9,655 students (plus 1,029 students) between 2015 and 2021, although enrollment at Capuchino High decreased by four students during the same period. While the 2,704 units within the SMUHSD service area would increase enrollment by 143 students, Capuchino High has recently supported as many as 1,225 students (an additional 102 students in comparison with current enrollment) during the 2019-2020 school year.

The additional 41 students added by the project to the Capuchino High in comparison with peak enrollment during the 2019-2020 school year is not anticipated to cause enrollment to exceed capacity. Further, the school impact fees paid during the buildout period would go towards installing portable buildings or completing any physical improvements necessary to accommodate the additional students. The SMUHSD could also consider adjustment of attendance boundaries to better allocate students to available school capacities. Consistent with Government Code Sections 65995 through 65998 (refer to Section 4.15.1.1 Regulatory Framework), payment of development impact fees by future development would ensure that buildout of the Housing Element Update would provide funding to help offset increased student populations that would require new or expanded school facilities.

Impact PS-4: The project would not result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for parks. (Less than Significant Impact)
Unlike fire and police stations and schools, parks do not have established service areas, since they can be used by anyone, including non-residents. Accordingly, the analysis of the Housing Element Update below examines the cumulative impact of buildout of all Housing Opportunity Sites on parks throughout the City.
133 Single family detached rate: 0.113; multi-family rate: 0.073. 134 Single family residential rate: 0.1; multi-family rate: 0.05. 2023-2031 Housing Element Update 224 Initial Study
City of San Bruno December 2022 (Revised January 2023)
As discussed in Section 4.14.2 under Impact POP-1, buildout of the Housing Opportunity Sites would result in the construction of an additional 3,618 housing units. Using the City’s average number of residents per household (2.64), construction of 3,618 housing units would increase the City’s population by an additional 9,552 residents in comparison with existing conditions.

The City maintains a parkland standard of 4.5 acres per 1,000 residents. The existing park acreage in the City is 199 acres, which based on the existing population of 42,656 residents, equates to 4.66 acres per 1,000 residents.
135 Implementation of the Housing Element would increase the City’s population to 52,208 residents through the year 2031, which would equate to 3.81 parkland acres per 1,000 residents.136 Consistent with Section 12.260 of the San Bruno Municipal Code (refer to Section

4.15.1.1), future residential development would be required to pay development impact fees. These fees would fund a portion of the anticipated new park and recreation infrastructure and capital facilities needed to accommodate growth and maintain performance standards. The fees paid by future developers would be used by the City to acquire and/or improve new park and recreation infrastructure and capital facilities. New facilities would be subject to their own project-level CEQA review.

For the reasons stated above, implementation of the Housing Element Update would not result in substantial adverse physical environmental impacts associated with the provision of new or physically altered park facilities in order to maintain acceptable service ratios, response times, or other performance objectives.

Impact PS-5: The project would not result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for other public facilities. (Less than Significant Impact) As noted in the City’s Development Impact Fee Nexus Study (refer to Section 4.15.1.1), the City has identified the need to provide new libraries and recreation facilities or physically alter existing library and recreation facilities, based on the relative share of service population growth attributable to new residents and employees. Implementation of the Housing Element Update would cause demand for public facilities to increase. Future residential development under the Housing Element would be required to pay development impact fees, which would partially fund new or physically altered facilities needed to accommodate growth and maintain performance standards. The fees paid by future developers would be used by the City to acquire and/or improve new public facilities. New facilities would be subject to their own project-level CEQA review.

For the reasons stated above, implementation of the Housing Element Update not result in substantial adverse physical environmental impacts associated with the provision of new or physically altered public facilities in order to maintain acceptable service ratios, response times, or other performance objectives.
135 42,656 divided by 1,000 equals 42.656; 200 acres divided by 42.656 equals 4.688. 136 52,208 divided by 1,000 equals 52.208; 199 acres divided by 52.208 equals 3.811. 2023-2031 Housing Element Update 225 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.16 RECREATION

4.16.1 Environmental Setting

4.16.1.1 Regulatory Framework
State
Government Code Section 66477
The Quimby Act (included within Government Code Section 66477) requires local governments to set aside parkland and open space for recreational purposes. It provides provisions for the dedication of parkland and/or payment of fees in lieu of parkland dedication to help mitigate the impacts from new residential developments. The Quimby Act authorizes local governments to establish ordinances requiring developers of new residential subdivisions to dedicate parks, pay a fee in lieu of parkland dedication, or perform a combination of the two.

Regional and Local
County of San Mateo Trails Master Plan
Adopted in 2001, the County of San Mateo Trails Master Plan is intended to, among other objectives, provide policies and guidelines for trails planning and to define environmental issues and mitigation measures for trail management.

City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating recreational impacts resulting from planned development within the City including the following:

Policies Description
LUD-76 Assure that new development mitigates impacts on existing public services, including transit services, water, sewer, and storm drainage systems, police and fire protection, libraries, and parks and recreation facilities.

OSR-1 Maintain a parkland dedication/in lieu fee standard of 4.5 acres/1,000 residents.

OSR-2 Amend the City’s Zoning Ordinance to ensure that all developments are subject to dedication/in lieu fee requirements, whether or not such developments result from subdivision.

OSR-3 Revise the City’s Park In-Lieu Fee to create an option (at the City’s discretion) to accept either Park In-Lieu Fees or require the developer to design/build parks and/or recreation facilities as part of the development.

OSR-4 Undertake a program to add 20 acres of parkland to the City system over the next 20 years.

Seize all opportunities to develop and/or maintain parks and recreation facilities within existing residential neighborhoods through acquisition or preservation of former school facilities.
2023-2031 Housing Element Update 226 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
OSR-5 Strive to locate neighborhoods park facilities within 1/3-mile walking distance of all residences in San Bruno. If limited in some neighborhoods, coordinate with local school districts to allow use of playgrounds and sports facilities after school hours.

OSR-6 Provide small public parks and/or plazas within BART and Caltrain station areas, within Downtown, and along El Camino Real. Provide benches, water fountains, and trees to serve as resting areas for pedestrians, commuters, and shoppers.

OSR-7 As former Skyline College properties are developed for single-family residential neighborhoods, create an option (at the City’s discretion) for development of parks and/or recreation facilities to serve San Bruno residents.

OSR-9 Actively implement the City’s Comprehensive Parks and Recreational Facilities Master Plan, which more fully identifies park and recreation needs and deficiencies.

OSR-10 Continue coordination with San Bruno Park School District (per the Five-Year Joint Use Agreement, 2002) to allow joint use of school facilities for after-school programs, sports leagues, and non-organized play.

OSR-12 Study potential locations and funding mechanisms for the development of a Teen Recreation Center that provides the types of programs and activities to successfully attract the City’s teens.

OSR-13 Design and construct non-traditional recreation facilities (skateboarding/BMX bike park, rock climbing wall, etc) to provide alternative forms of recreation for the City’s teens.

Coordinate this facility with the Parks and Recreation Commission.

OSR-14 Continue to support and expand adult (50+) programs and activities offered at the Senior Center. Develop plans to expand the facility as needed to accommodate the City’s senior population.

OSR-15 Study potential sites and funding mechanisms for relocation of the San Bruno Swim Center, or development of a new multi-programmed Aquatics Facility.

PFS-3 Require, as part of plan review, identification of needed public service improvement and maintenance costs for those projects that may have a significant impact on existing services.

PFS-5 Develop a Civic Center Complex Master Plan, in order to coordinate rehabilitation and expansion of the various City departments and service providers.

City of San Bruno Municipal Code
Pursuant to Section 12.260 of the City’s Municipal Code, the City assesses fees upon development projects to fully or partially offset the costs of public facilities and infrastructure that is needed to serve new demand created by development projects. As established by Municipal Code Section

12.44, the City maintains a parkland dedication/in-lieu fees standard of 4.5 acres per 1,000 residents.

Effective July 1, 2022, the development impact fee is $29,494.53 per single-family residential unit and $27,083.16 per multi-family residential unit.137
137 City of San Bruno. FY2022-23 Master Fee Schedule. July 2022. 2023-2031 Housing Element Update 227 Initial Study
City of San Bruno December 2022 (Revised January 2023)
City of San Bruno Development Impact Fees Nexus Study
The City of San Bruno prepared the San Bruno Development Impact Fee Nexus Study designed to provide the City of San Bruno with the necessary technical documentation in order to adopt a comprehensive development impact fee program. As discussed in the nexus study, development impact fees are one-time charges on new development projects that are collected and used by jurisdictions to cover the cost of capital facilities and infrastructure needed to serve the new residential and development growth. Impact fees are regulated by Government Code Sections 66000- 66025. The purpose of the nexus study is to determine the maximum allowable fees that the City can charge for facilities and infrastructure consistent with the legal requirements of AB 1600. Fees collected under AB 1600 are to be collected for capital facility and infrastructure improvements only, used to fund facility needs created by new development rather than existing deficiencies, and the fees are to be based on a rational nexus between new development and the costs of the capital facilities and infrastructure needed to accommodate such development.

4.16.1.2 Existing Conditions
San Bruno currently provides its residents with a total of 72 acres of City parkland. There are five small pocket parks, 12 neighborhood parks, and one large community park. The Parks and Recreation Services Department maintains all developed municipal park sites, four school sites, street medians, and landscaping along San Mateo Avenue and at other City facilities. Hiking and cycling trails are located west of the city boundary within the Golden Gate National Recreation Area and the San Francisco Peninsula Watershed, accessible from Sneath Lane and San Bruno Avenue.

San Bruno City Park, Grundy Park, and Lion’s Field are the City’s most utilized parks.

In addition to city parks, local recreation centers, school facilities, and a 108-acre regional park—San Mateo County’s Junipero Serra Park—provide recreational opportunities for San Bruno residents.

There are four different recreation centers in San Bruno: the Belle Air Community Center, the Veterans Memorial Recreation Center, the San Bruno Senior Center, and the Portola Performing Arts Center.

4.16.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
1) Would the project increase the use of existing
neighborhood and regional parks or other
recreational facilities such that substantial
physical deterioration of the facility would
occur or be accelerated?
2) Does the project include recreational facilities
or require the construction or expansion of
recreational facilities which might have an
adverse physical effect on the environment?
2023-2031 Housing Element Update 228 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact REC-1: The project would not increase the use of existing neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated. (Less than Significant Impact)
As discussed in Section 4.14.2 under Impact POP-1, buildout of the Housing Opportunity Sites, along with 669 pipeline units that have been entitled and 240 ADUs, would result in the construction of an additional 3,618 housing units. Using the City’s average number of residents per household (2.64), construction of 3,618 housing units would increase the City’s population by an additional 9,552 residents in comparison with existing conditions.

Implementation of the Housing Element Update and the associated increase in population is anticipated to increase the use of parks and other recreational facilities. As discussed in Section 4.15 under Impact PS-4, buildout of the Housing Element Update would not result in substantial adverse physical environmental impacts associated with the provision of new or physically altered park facilities in order to maintain performance objectives. Therefore, the project would not increase the use of neighborhood or regional parks such that substantial physical deterioration of the facility would occur or be accelerated. Further, consistent with Section 12.260 of the San Bruno Municipal Code (refer to Section 4.15.1.1), future residential development would be required to pay development impact fees. These fees would fund a portion of the anticipated new recreation infrastructure and capital facilities needed to accommodate growth and maintain facilities. The fees paid by future developers would be used by the City to acquire and/or improve recreation infrastructure and capital facilities.

For the reasons stated above, implementation of the Housing Element Update would not increase the use of recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated.

Impact REC-2: The project does not include recreational facilities or require the construction or expansion of recreational facilities which might have an adverse physical effect on the environment. (Less than Significant Impact) It is reasonably foreseeable that future development under the Housing Element Update may include on-site open space and other recreational facilities, or require the construction or expansion of recreational facilities. As noted elsewhere in this Initial Study, new or expanded facilities would be subject to their own project-level CEQA review, and recreational facilities are low-impact land uses that do not typically result in substantial environmental impacts. Further, the EIRs prepared for the General Plan, TCP, and Bayhill Specific Plan concluded that with adherence to the General Plan policies identified in Section 4.16.1.1 and payment of development impact fees, construction or expansion of recreational facilities would have less than significant environmental impacts.

Development of the Housing Opportunity Sites would be subject to General Plan policies identified in Section 4.16.1.1 and required to pay their fair share of development impact fees. For these reasons, new or expanded recreational facilities constructed as a result of the Housing Element Update would not have an adverse physical effect on the environment. 2023-2031 Housing Element Update 229 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.17 TRANSPORTATION
The following discussion is based, in part, on an VMT Analysis prepared for the Housing Element Update by Hexagon Transportation Consultants, Inc. A copy of this report, dated May 2022, is attached to this Initial Study as Appendix C.

4.17.1 Environmental Setting

4.17.1.1 Regulatory Framework
State
Senate Bill 743
SB 743 establishes criteria for determining the significance of transportation impacts using a vehicle miles traveled (VMT) metric intended to promote the reduction of GHG emissions, the development of multimodal transportation networks, and a diversity of land uses. Specifically, SB 743 requires analysis of VMT in determining the significance of transportation impacts. Local jurisdictions were required by Governor’s Office of Planning and Research (OPR) to implement a VMT policy by July 1, 2020.

SB 743 did not authorize OPR to set specific VMT impact thresholds, but it did direct OPR to develop guidelines for jurisdictions to utilize. CEQA Guidelines Section 15064.3(b)(1) describes factors that might indicate whether a development project’s VMT may be significant. Notably, projects located within 0.50 mile of transit should be considered to have a less than significant transportation impact based on OPR guidance.

Regional
Regional Transportation Plan
MTC is the transportation planning, coordinating, and financing agency for the nine-county San Francisco Bay Area, including Contra Costa County. MTC is charged with regularly updating the Regional Transportation Plan, a comprehensive blueprint for the development of mass transit, highway, airport, seaport, railroad, bicycle, and pedestrian facilities in the region. MTC and ABAG adopted Plan Bay Area 2050 in October 2021, which includes a Regional Transportation Plan to guide regional transportation investment for revenues from federal, state, regional and local sources through 2050.

City/County Association of Governments
C/CAG works on issues that affect the quality of life in general: transportation, air quality, stormwater runoff, airport/land use compatibility planning, hazardous waste, solid waste and recycling. C/CAG, as the Congestion Management Agency for San Mateo County, is required to prepare and adopt a Congestion Management Program (CMP) on a biennial basis. The purpose of the CMP is to identify strategies to respond to future transportation needs, develop procedures to alleviate and control congestion, and promote countywide solutions. The CMP is required to be consistent with the MTC planning process that includes regional goals, policies, and projects for the 2023-2031 Housing Element Update 230 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Regional Transportation Improvement Program.138 Projects are required to submit a Transportation Demand Management (TDM) plan in compliance with the CMP guidelines if the project will generate 100 net new average daily trips (ADT) to the CMP roadway network.

Local
City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating transportation impacts resulting from planned development within the City including the following:

Policies Description
HS-17 Synchronize traffic signals between El Camino Real, Sneath Lane, Huntington Avenue, and San Bruno Avenue, to improve traffic flows into and out of the San Bruno BART Station.

HS-18 Require right-of-way landscaping to be maintained at an appropriate scale, so as to not reduce visibility at intersections.

HS-19 Should Caltrans vacate El Camino Real as a State highway, reconfigure the roadway to include wide sidewalks, streetscaping, and marked bicycle lanes. Consider various alternative configurations of traffic flow.

LUD-9 Provide safe and comfortable pedestrian routes through residential areas by requiring sidewalks on both sides of streets, planting street trees adjacent to the curb, allowing onstreet parking, and minimizing curb cuts.

LUD-76 Assure that new development mitigates impacts on existing public services, including transit services, water, sewer, and storm drainage systems, police and fire protection, libraries, and parks and recreation facilities.

T-A Provide for efficient, safe, and pleasant movement for all transportation modes—vehicles, bicycles, transit, and pedestrians.

T-B Maintain acceptable levels of service for vehicular movement along the city’s street network.

Acceptable level of service could vary based on characteristics of the area under consideration.

T-D Provide adequate parking facilities for commercial, industrial, and transit station areas.

T-E Focus San Bruno’s efforts on improvements to the non-motorized transportation system (i.e., bicycles, pedestrians, strollers, etc.) adjacent to transit corridors and stations, and their connections to those systems.

T-F Provide efficient local transit—such as a shuttle system—to the BART and Caltrain stations to avoid dependence on individual motor vehicles.

T-G Protect residential areas from congestion and associated noise resulting from BART and Caltrain spillover traffic. 138 City/County Association of Governments of San Mateo County. “San Mateo County Congestion Management Program 2019”. Accessed October 24, 2022. https://ccag.ca.gov/programs/transportation-programs/congestionmanagement/. 2023-2031 Housing Element Update 231 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
T-H Provide efficient local transit—such as a shuttle system—to the BART and Caltrain stations to avoid dependence on individual motor vehicles.

T-I Develop and maintain a comprehensive bicycle network within San Bruno, providing connections to BART and Caltrain, surrounding cities, employment and shopping areas, and natural areas.

T-J Develop a safe, convenient, and continuous network of sidewalks and pedestrian paths within the city.

T-2 Ensure that all transportation improvements—roadway, transit, bicycle, and pedestrian—are designed and constructed according to Americans with Disabilities Act standards. Improve existing facilities so they are compliant with American Disability Act standards.

T-3 Encourage provision of bicycle facilities such as weather protected bicycle parking, direct and safe access for pedestrians and bicyclists to adjacent bicycle routes and transit stations, showers and lockers for employees at the worksite, secure short-term parking for bicycles, etc.

T-6 Maintain LOS standards for intersections for AM and PM peak periods as shown in Figure 4-

2. T-7 Undertake improvements to intersections shown T-7 in Table 4-8 and in Figure 4-7 to ensure their operation at the LOS shown in Figure 4-2. Determine costs for these improvements and establish an impact fee program to assess improvement costs to new development, proportionate to the impacts created by such development.

T-8 Support widening of Skyline Boulevard between Sneath Lane and I-280 to alleviate traffic congestion problems, if concerns regarding sensitive natural resources can be mitigated.

Preserve the mature trees in the area, if feasible.

T-10 Improve signage and access at the intersection of San Mateo Avenue, Taylor Avenue, and El Camino Real.

T-14 Use traffic-calming measures to reduce speeding in residential areas, rather than limiting through-street connections. Traffic-calming measures may include:
• Narrowing travel lanes and allowing on-street parking; • Using different paving materials at pedestrian crosswalks; • Planting street trees and other vegetation;
• Building corner bulb-outs and intersection round-abouts; • Installing stop and/or yield signage; and
• Speed limit enforcement or other mitigation measures.

T-17 Synchronize traffic signals between El Camino Real, Sneath Lane, Huntington Avenue, and San Bruno Avenue, to improve traffic flows into and out of the San Bruno/Tanforan BART Station.

T-21 Consider investment in Intelligent Transportation System (ITS) to enhance efficiency of existing network, potential ITS strategies includes:
• Roadway monitoring system (cameras, centralized traffic control center) • Enhance travel information (variable message signs at major intersections) • Incidence Response Plan
2023-2031 Housing Element Update 232 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
• Adaptive Traffic Signal Timing along major arterials
T-22 Apply turning restrictions to major arterials during peak hours to improve general traffic flow.

T-23 Implement Parking Guidance System to guide motorists to parking locations in commercial areas.

T-24 Implement targeted reinforcement program to eliminate double parking in downtown and along San Bruno Ave and El Camino Real.

T-34 Comprehensively review and revise parking standards for new office and commercial development providing alternative transportation measures (i.e., vanpool, shuttle service, bicycle storage).

T-35 Conduct a parking study to determine potential deficiencies at parks and public facilities.

Recommend parking solutions.

T-36 Enforce on-street and off-street parking restrictions, particularly of motor homes, trailers, boats, and non-operating vehicles, and in residential areas near major transit facilities.

T-37 Require provisions and marking of handicapped parking spaces in conformance with California Vehicle Code to allow enforcement by public agencies or private interests.

T-38 Study the possibility of providing public parking facilities for commercial and industrial areas. Designate general areas where parking lots are needed; purchase site(s) if possible when land uses change to avoid displacement of occupants. Consider the use of assessment districts to fund land acquisition.

T-39 Encourage parking lot access from non-residential side streets in order to minimize interruption to traffic flow on primary streets (San Bruno Avenue east of El Camino Real and along El Camino Real).

T-40 Consider reduced parking standards within transit corridors and station areas in recognition of their proximity to high frequency transit service, mix of land uses, and walkable environment.

T-41 Allow joint use of parking facilities when nearby uses have staggered peak periods of demand.

T-42 Do not allow parking lots to dominate the frontage of mixed-use streets, interrupt pedestrian routes, or negatively impact surrounding neighborhoods.

T-43 Create a “pedestrian-friendly” environment surrounding the BART and Caltrain stations by installing additional street trees, lighting, signage, and widening sidewalks along streets adjacent to these stations.

T-44 Support the Caltrain Grade Separation Project, featuring relocation of the Caltrain station above grade at the San Mateo Avenue/San Bruno Avenue intersection. Provide main parking facilities for the Caltrain station on the former San Bruno Lumber site north of the intersection, and bicycle and pedestrian connections to surrounding areas with prominence given to access south to Downtown.

T-45 During the Caltrain Grade Separation Project, ensure that the San Bruno station serves as an important gateway and northern anchor to Downtown, which should be clearly visible from the station platform.
2023-2031 Housing Element Update 233 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
T-46 As rail capacity increases with expanded BART and Caltrain service, install pedestrian safety measures—such as clear markings, safety gates, alternative routes, or overcrossings—at all at-grade railway crossings in the city. At grade-separated locations, provide safe pedestrian under-crossings.

T-47 Improve multi-modal access—specifically for pedestrians, cyclists, and transit passengers— to the BART and Caltrain stations through improvements along Huntington Avenue.

T-48 Incorporate a dedicated pedestrian crossing and flashing street markers at the new four-way signal installed on El Camino Real connecting The Crossing with The Shops at Tanforan and the San Bruno BART station.

T-49 Install adequate turning, driveway, and drop-off lanes at the San Bruno BART and planned S n Bruno Avenue Caltrain stations to accommodate the increased levels of traffic expected.

T-50 Consider developing a shuttle service to provide reliable, consistent, and convenient access between the BART and Caltrain stations and other destinations within the city, including Bayhill Office Park, Skyline College, Downtown, schools and neighborhoods in the western and southern portions of the city.

T-51 Publicize all routes that provide non-auto access to the BART and Caltrain station areas, such as the GAP Inc. shuttle, bicycle routes, etc.

T-52 Work with BART and Caltrain to provide park and ride facilities with convenient, safe pedestrian access to the transit stations.

T-53 Coordinate with the Peninsula Corridor Joint Powers Board to ensure design of the planned San Bruno Avenue Caltrain Station (and Grade Separation Project) that will accommodate such regional transit improvements.

T-55 Consider developing a parking permit system in residential areas adjacent to the new Caltrain Station to prevent overflow parking, when requested by a designated majority of residents in that area.

T-57 Work with SamTrans to schedule the routing of public transit in San Bruno so that a majority of residents are within walking distance of transit stops.

T-58 Work with SamTrans to design the local bus transit system for maximum passenger satisfaction, safety, comfort, convenience, and privacy.

T-59 Encourage SamTrans to configure bus transit service to serve connections with other transit systems (BART, Caltrain, SFO Airport, and other bus lines).

T-65 Work with SamTrans to locate transit stops directly adjacent to buildings with retail frontage, rather than severed by large parking lots.

T-66 Design arterial and collector streets to facilitate safe pedestrian crossings to transit stops.

Provide crosswalks at all signalized arterial intersections.

T-67 Encourage installation of bus shelters, appropriate for year-round weather, to provide comfortable, safe waiting areas for SamTrans riders.

T-69 Continue to work toward dedication and/or installation of bicycle lanes throughout the city in accordance with [General Plan] Figure 4-4, to enhance recreational opportunities and make bicycling a more viable transportation alternative. Implement bicycle route improvements 2023-2031 Housing Element Update 234 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
including signing, striping, paving, and provision of bicycle facilities at employment sites, shopping centers, schools, and public facilities.

T-70 Identify funding for and implement as a priority bicycle/pedestrian paths along the BART and Caltrain track alignments (Huntington Avenue and Herman Avenue) within the city limits. Coordinate with the Linear Park planned in South San Francisco and Millbrae.

T-71 Provide bicycle parking facilities in Downtown, Bayhill Office Park, BART and Caltrain Stations, The Shops at Tanforan and Towne Center, parks, schools, and other key destinations. Review bicycle standards as part of the Zoning Ordinance Update.

T-72 Identify and mark safe bicycle routes providing connections between the BART and Caltrain stations, and the following regional trail networks:
• Bay Area Ridge Trail,
• Sweeney Ridge Trail,
• Bay Trail,
• San Andreas Trail, and
• Sawyer Camp Trail.

T-74 Ensure maintenance of vegetation along bicycle routes within the city. Ensure that overgrown vegetation does not push bicyclists into vehicular travel lanes and cause potential accidents.

T-75 Link sidewalks directly to building entrances. Avoid routes through parking lots or at the rear of residential developments.

T-76 Require construction of sidewalks at least five (5) feet wide along newly built streets within San Bruno, and four (4) feet wide on older streets to preserve street character in older neighborhoods.

T-77 Create a pedestrian-oriented setting along the Pedestrian Emphasis Zones (see [General Plan] Figure 4-6) through potential construction of the following public improvements:
• Brick pavers to make sidewalks look more distinct
• Street trees to soften the environment and provide color and shade; • Human-scale street lights for enhanced aesthetics and illumination; • Banners and flags to make the area look more festive and cheerful; and • Benches to give people a place to sit, rest, and watch what goes on around them.

T-78 Allow new development to contribute to the Pedestrian Emphasis Zones (Figure 4-6) through construction of off-site improvements.

T-80 Install safety improvements for pedestrian crossings along El Camino Real. Such improvements may include bulb-outs at the corners, crossing medians, and signal synchronization.

T-81 Provide for public safety and efficient operation in the planning, construction, and maintenance of transportation facilities.

City of San Bruno Transportation Element
The transportation element of the San Bruno General Plan describes San Bruno’s existing transportation network, including roadway and highway system, scenic corridors, transit systems, and pedestrian and bicycle facilities, and provides policies that address all modes of transportation, as 2023-2031 Housing Element Update 235 Initial Study
City of San Bruno December 2022 (Revised January 2023)
well as the interrelationship between the modes. Circulation and traffic within the City specifically are analyzed by examining roadway and intersection operations in terms of “level of service” (LOS), which is a measure of driving conditions and vehicle delay. Levels of service range from A (best) to F (poorest). LOS A, B and C indicate conditions where traffic can move relatively freely. LOS D describes conditions where delay is more noticeable. LOS E indicates conditions where traffic volumes are at or close to capacity, resulting in significant delays and average travel speeds that are one-third the uncongested speeds or lower. LOS F characterizes conditions where traffic demand exceeds available capacity, with very slow speeds (stop-and-go), long delays (over a minute) and queuing at signalized intersections.

City of San Bruno Walk ‘N Bike Plan
The City of San Bruno Walk ‘N Bike Plan was adopted July 26, 2016. The plan presents the desired state of walking and biking in San Bruno 10 years out that would result from implementation of the Walk ‘N Bike Plan. Chapters Five through Eight of the Walk ‘N Bike Plan identify specific infrastructure projects and program action items that would implement the City’s vision.

City of San Bruno Development Impact Fees Nexus Study
The City of San Bruno prepared the San Bruno Development Impact Fee Nexus Study designed to provide the City of San Bruno with the necessary technical documentation in order to adopt a comprehensive development impact fee program. As discussed in the nexus study, development impact fees are one-time charges on new development projects that are collected and used by jurisdictions to cover the cost of capital facilities and infrastructure needed to serve the new residential and development growth. Impact fees are regulated by Assembly Bill (AB) 1600 (Government Code Section 66000 et seq.). The purpose of the nexus study is to determine the maximum allowable fees that the City can charge for facilities and infrastructure consistent with the legal requirements of AB 1600. Fees collected under AB 1600 are to be collected for capital facility and infrastructure improvements only, used to fund facility needs created by new development rather than existing deficiencies, and the fees are to be based on a rational nexus between new development and the costs of the capital facilities and infrastructure needed to accommodate such development.

Transit Corridors Plan
As noted in Section 3.1.1.1, Housing Opportunity Sites 1, 2, 4, 5, 7, 9, 11, 12, 15, 17, 20, 21, 22, and 23 are located within the TCP area. The TCP includes development standards and design guidelines that govern future private development actions in the TCP area, including the following which pertain to the circulation system.

Policies Description
TRANS-A Promote the development of the Transit Corridors Area’s street and intersection network that supports the proposed intensification of land uses, while providing mobility for all travel modes.

TRANS-B Ensure increased transit connectivity within and to/from the Transit Corridors Area and provide for transit amenities at stops and stations that increase the visibility of stops/stations and improve the comfort and convenience for transit riders. 2023-2031 Housing Element Update 236 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
TRANS-C Encourage improved bicycle connectivity and enhanced bicycle parking opportunities within the Transit Corridors Area linking the surrounding land uses and future Caltrain station.

TRANS-D Facilitate pedestrian access and safety through pedestrian enhancements, including the provision of enhanced crosswalks at all intersections and wider sidewalks and pedestrian amenities along the transit corridors.

TRANS-E Develop and implement a parking management strategy for the Plan area that makes efficient use of the City’s parking supply through shared parking strategies and that provides the lowest number of parking spaces, while still maintaining the viability of the Plan through efficient use of the parking supply within the Plan Area.

TRANS-F Develop and implement a TDM Program that reduces the amount of peak-period motor vehicle traffic and encourages the use of modes other than the single-occupant vehicle.

Bayhill Specific Plan
As noted in Section 3.1.1.1, Housing Opportunity Sites 3 and 13 are located within the Bayhill Specific Plan area. Chapter Four of the Bayhill Specific Plan includes mandatory transportation policies, including the following which were identified in the Bayhill Specific Plan EIR.

Policy 4-5
Policy 4-5 encourages TDM programs to support high-frequency, reliable, all-day shuttle to BART and Caltrain stations and Downtown San Bruno, and requires the preparation of a first/last mile study for travel between the Bayhill Specific Plan area and the BART and Caltrain stations that includes a study of bicycle connections.

Policy 4-6
Policy 4-6 requires the City and property owners in the Bayhill Specific Plan area to enhance existing transit stop infrastructure concurrent with redevelopment of properties whose street frontage include transit stops.

Policy 4-12
Policy 4-12 requires all new developments to submit a Construction Management Plan (CMP) prior to issuance of a demolition, grading, or building permit, and ongoing throughout demolition, grading and/or construction. The CMP is intended to outline traffic management strategies to reduce, to the extent feasible, traffic congestion, closures on the transportation network including emergency access and emergency response vehicles, the effects of parking demand by construction workers, and other nearby projects that could be simultaneously under construction.

Policy 4-13
Policy 4-13 requires all contractors to ensure that any pedestrian, bicycle, or transit facility closed or obstructed by construction activity be replaced with a convenient and accessible alternative that replicates as nearly as practicable the most desirable characteristics of the original facility. 2023-2031 Housing Element Update 237 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.17.1.2 Existing Conditions
Transit Services
BART, the Caltrain, and the San Mateo County Transit District (SamTrans) currently provide transit service in San Bruno. The transit services provided by these three systems are described below.

BART
BART is a 131-mile, automated rapid transit system serving over four million people in the counties of Alameda, Contra Costa, Santa Clara, San Francisco, and San Mateo. Fifty BART stations are located along five lines of double track system wide. Trains traveling up to 75 miles per hour connect San Francisco to Millbrae and to other East Bay communities – north to Richmond, east to Antioch, east to Dublin/Pleasanton, and south to Berryessa/North San José. BART’s current weekday ridership is approximately 440,000. BART trains operate from five a.m. to midnight Monday through Friday, six a.m. to midnight on Saturday, and eight a.m. to midnight on Sunday.139 Service is provided by BART at the San Bruno BART Station, located at 1151 Huntington Avenue, adjacent to Housing Opportunity Site 14. The San Bruno BART Station is served by the AntiochSFIA/Millbrae and Richmond-Millbrae/SFIA lines, which operate on weekdays with headways ranging from 15 to 30 minutes, on Saturdays with headways ranging from 14 to 30 minutes, and on Sundays and holidays with headways of 30 minutes.140 San Bruno averages 1,317 passengers on and 1,394 passengers off on weekdays, 828 passengers on and 939 passengers off on Saturdays, and 532 passengers on and 624 passengers off on Sundays and holidays. Total monthly passengers entering at the San Bruno BART Station per the latest ridership report amounts to 34,415 passengers.141 Caltrain142
Caltrain is a fixed guideway commuter rail system serving San Francisco, San Mateo and Santa Clara counties that spans 77.3 miles and includes 32 stations — 29 of which are weekday service, 24 which are weekend service (including two weekend-only stations), and one special event service station which serves Stanford Stadium.

Service is provided by Caltrain at the San Bruno Caltrain Station located at 833 San Mateo Avenue.

In 2019, daily mid-weekday ridership (when ridership levels are highest) averaged 317 northbound passengers on and 376 northbound passengers off, respectively, and 434 southbound passengers on and 337 southbound passengers off, respectively. San Bruno ranks 19th in average mid-weekday ridership at 751 total passengers on and 713 passengers off.

SamTrans143
SamTrans is the primary regional and local bus transit provider within San Mateo County, serving all rail stations within the County and major transit transfer points for Santa Clara and San Francisco 139 Bay Area Rapid Transit. “System Facts”. Accessed October 13, 2022. https://www.bart.gov/about/history/facts 140 Bay Area Rapid Transit. “San Bruno Station”. Accessed October 13, 2022. https://www.bart.gov/stations/sbrn 141 Bay Area Rapid Transit. 2022 Monthly Ridership Reports. September 2022. 142 Caltrain. Caltrain 2019 Annual Passenger Count Key Findings. 2019. 143 City of San Bruno. Walk ‘N Bike Plan. July 2016. 2023-2031 Housing Element Update 238 Initial Study
City of San Bruno December 2022 (Revised January 2023)
counties. SamTrans operates 76 bus routes throughout San Mateo County and into parts of San Francisco and Palo Alto. San Bruno is served by the following SamTrans routes.

Route 141
Route 141 runs between South San Francisco to San Bruno with service to San Bruno BART. Key destinations include The Shops at Tanforan. Route 141 has five different variants that provide limited service to Belle Air School, Parkside School, San Bruno Senior Center, and Peninsula High School.

Weekday service operates every 30-minutes between 6:30 a.m. and 7:30 p.m. On weekends, service operates between 7:15 to 6:45 with 30-60-minuteheadways.

Route 142
Route 142 runs between SFO and the San Bruno Senior Center, with stops at the San Bruno BART Station and Shelter Creek. Route 142 has four different variants. Service is provided on one hour headways, between 6:00 a.m. and 7:00 p.m. on weekdays and between 7:00 a.m. and 7:00 p.m. on weekends.

Route ECR
The ECR is 27-mile long route that connects Daly City BART with Palo Alto Transit Center vie El Camino Real. It travels through multiple jurisdictions, including Daly City, Colma, South San Francisco, San Bruno, Burlingame, San Mateo, San Carlos, Redwood City, and Palo Alto. The ECR parallels BART service between Daly City and Millbrae and serves every station in between. The ECR also parallels the Caltrain corridor between Millbrae and Palo Alto, and has stops within a quarter-mile of every station in between. The route has frequent service between 4:05 a.m. and 12:35 a.m. with approximately 20-minute service on weekdays and 30-minute weekend service. Night owl service is provided every 60-minutes between San Francisco International Airport and Daly City.

Route EPX
Route EPX is a limited-stop route connecting East Palo Alto and Redwood City to San Francisco International Airport. Some trips terminate in the northern end at the San Bruno BART Station, while limited service is provided on this route to downtown San Francisco. Route EPX operates during weekday peak hours (5:00 a.m. to 9:30 a.m., 2:30 p.m. to 7:30 p.m.) on 60 minute headways.

Roadway Network
The roadway network in San Bruno consists of freeways, arterials, major collectors, minor collectors, and local streets. Freeways are “controlled-access” thoroughfares, meaning that only high-speed motor-vehicle traffic is allowed on them. Freeways within or adjacent to the City include:
• I-280 (Interstate 280), which bisects the City in a north–south direction. • I-380 (Interstate 380), a short east–west freeway spur, connecting I-280 to U.S. Highway 101 near San Francisco International Airport.
• U.S. Highway 101, which runs alongside the east side of San Bruno, just beyond the City border, in a north–south direction.
2023-2031 Housing Element Update 239 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Arterials are medium-speed, medium-volume roads that generally connect to freeways and to other arterials. San Bruno has fewer than ten streets designated as arterials (according to the San Bruno General Plan) yet they form the backbone of the City’s circulation system. They generally have two to four traffic lanes and speeds between 25 and 40 miles per hour. Collectors are lower-speed, lowervolume streets than arterials; they generally serve shorter trips and are generally intended for collecting cars from local streets and distributing them to the arterial network.

The arterials and major collectors that run in a generally north–south direction are (listed from east to west):
• San Mateo Avenue north of Huntington Avenue;
• Huntington Avenue north of San Mateo Avenue;
• El Camino Real (designated as State Route 82).
• Cherry Avenue between Sneath Lane and San Bruno Avenue West. • Skyline Boulevard (State Route 35).

The arterials and major collectors that run in a generally east–west direction are (listed from north to south):
• Sneath Lane east of Skyline Boulevard;
• San Bruno Avenue;
• Jenevein Avenue;
• Crystal Springs Road to I-280, including a short segment of Cunningham Way.

Minor collectors in San Bruno include San Felipe Avenue, Angus Avenue, Kains Avenue, Cherry Avenue south of San Bruno Avenue, Crestmoor Drive, Fleetwood Drive and College Drive. The rest of the street network is made up of local streets, which are low-speed, low-volume, neighborhoodserving streets whose main purpose is to provide access to fronting properties.

Bicycle Facilities
Bicyclists may use any non-freeway street in San Bruno, which has few dedicated bicycle facilities.

Bike lanes exist on portions of only a few streets, including Sneath Lane, Commodore Drive and Sharp Park Road; in addition, San Bruno Avenue west of I-280 has a wide shoulder that functions like a bike lane, even though it does not have bike-lane stencils or signage. There are no formal offstreet bike paths within San Bruno.

Sparse bicycle parking is available at City facilities or in the public right-of-way, and the City does not have an ordinance requiring bicycle parking in private developments. There is bicycle parking in the form of both racks and lockers at the City’s BART and Caltrain stations. Traffic signals in San Bruno do not have bicycle-detection technology.
2023-2031 Housing Element Update 240 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Pedestrian Facilities
The main facilities for pedestrians in San Bruno consist of sidewalks and crosswalks and, to a lesser extent, off-street footpaths. San Bruno has an extensive system of sidewalks, marked crosswalks and pedestrian crossing signals, particularly on the arterials and collectors and at main intersections.

Many of the residential streets also have sidewalks, at least on one side, and marked crosswalks, especially at crossings with major streets. In addition, in recent years, the City has been installing curb ramps at key locations to improve access for persons with disabilities. Off-street footpaths are found in San Bruno City Park and Junipero Serra County Park.

4.17.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Conflict with a program, plan, ordinance, or
policy addressing the circulation system,
including transit, roadways, bicycle lanes, and
pedestrian facilities?
2) Conflict or be inconsistent with CEQA
Guidelines Section 15064.3, subdivision (b)?
3) Substantially increase hazards due to a
geometric design feature (e.g., sharp curves or
dangerous intersections) or incompatible uses
(e.g., farm equipment)?
4) Result in inadequate emergency access?
Impact TRN-1: The project would not conflict with a program, plan, ordinance, or policy addressing the circulation system, including transit, roadways, bicycle lanes, and pedestrian facilities. (Less than Significant Impact with Mitigation Incorporated)
Transit Services
Construction-related activities would typically occur Monday through Friday, with limited construction activities outside of daytime hours or on weekends. The number of construction workers at this time is not reasonably foreseeable, but it is anticipated that only a small proportion of these workers would be expected to arrive by public transit given the equipment demands and shift hours, which are offset from peak transit service, typical of construction work. Any construction workers who travel to the Housing Opportunity Sites using public transit would likely do so during off-peak hours when transit has ample capacity to accommodate the additional load. For these reasons, construction-related transit capacity impacts associated with the Housing Element Update would be less than significant.
2023-2031 Housing Element Update 241 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Future development under the Housing Element Update would be required to adhere with the General Plan policies adopted to avoid or reduce impacts to transit services (refer to Section

4.17.1.1), including those requiring the City and future developments to coordinate with BART, Caltrain, and SamTrans and enhance, construct, or fund improvements to transit stops. As discussed below, implementation of MM TRN-1.1 would require preparation of individual transportation analyses that identify and rectify any inconsistencies with General Plan policies, including those addressing transit services. Further, no capacity issues have been identified in connection with the San Bruno BART or Caltrain stations or SamTrans routes identified in Section 4.17.1.2, and capacity is anticipated to exceed demand through buildout of the Housing Element Update. For these reasons, implementation of the Housing Element Update would not conflict with any programs, plans, ordinances, or policies addressing transit services. (Less than Significant Impact) Roadway Network
Construction-related activities associated with redevelopment the Housing Opportunity Sites would be subject to Section 6.16.070 of the San Bruno Municipal Code, subject to time of day and other restrictions pursuant to project-specific conditions the City might require. Construction staging is presumed to occur within the boundaries of the sites and outside of the public right-of-way.

However, construction activity could result in temporary roadway and sidewalk closures, effects on roadway circulation due to construction trucks, an increase in vehicle trips and vehicular parking demand associated with construction workers, and relocation of bus stops and temporary transit detours. All future detailed construction plans would be required to undergo review by the San Bruno Fire Department before work begins. Temporary travel lane closures needed to make improvements to the street network would be coordinated with SamTrans and the City to reduce impacts on local circulation operations. These types of construction-related transportation impacts would be temporary, generally short term, and conducted in accordance with City permit requirements.

Therefore, construction-related road closures, relocations, and modifications associated with future development of the Housing Opportunity Sites would be less than significant.

Programs, plans, ordinances, and policies regarding the roadway network are identified in Section

4.17.1.1. As discusses under Impact TRN-2, redevelopment of the Housing Opportunity Sites would have a less than significant VMT impact, and therefore would not conflict with SB 743. Future development under the Housing Element Update would be consistent with Plan Bay Area 2050 (refer to Section 4.11 Land Use and Planning and Section 4.14 Population and Housing) and would be required to prepare a TMD plan if it would generate 100 net new ADT, and therefore would be consistent with regional regulations regarding the roadway network. In addition to state and regional regulations, the City of San Bruno General Plan and associated Transportation Element include multiple policies adopted to avoid or reduce impacts to the roadway network, including policies related to LOS and intersection operations and payment of impact fees commensurate with the impact of new development. As noted in Section 1.1 Purpose of the Initial Study, future development under the Housing Element Update would be subject to project-level environmental review. As part of the project-level environmental review, a transportation analysis that includes an evaluation of future development in comparison with the City’s policies adopted to avoid or reduce impacts to the roadway network would be required.
2023-2031 Housing Element Update 242 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Mitigation Measures:

MM TRN-1.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites that would generate a sufficient amount of trips (as determined by the City’s traffic engineer) to prepare a Transportation Analysis (TA) prior to the issuance of any discretionary permits. Prior to the preparation of the TA, a scope of work outlining the proposed approach to the TA shall be submitted to the Director of Public Works or the director’s designee for review and approval. The TA, at a minimum, shall evaluate the proposed development for consistency with the City’s General Plan and Walk ‘N Bike Plan, review the proposed layout for any geometric design features that may increase hazards (e.g., sight distances, turning radii, etc.), and verify adequate emergency access is provided. The TA shall provide recommendations addressing any identified inconsistencies, geometric design hazards, or emergency access issues that shall be incorporated into the final design. The TA shall be prepared in accordance with Public Works’ guidance and submitted prior to the approval of any discretionary permits as part of the project-level review of all future development under the Housing Element Update.

Implementation of MM TRN-1.1 would ensure that any inconsistencies with General Plan programs, plans, ordinances, and policies regarding the roadway network associated with operation of residential uses at the Housing Opportunity Sites are identified and addressed prior to approval of any discretionary permits. (Less than Significant Impact with Mitigation Incorporated) Bicycle and Pedestrian Facilities
Programs, plans, ordinances, and policies regarding bicycle and pedestrian facilities, including the General Plan and Walk ‘N Bike Plan, are identified in Section 4.17.1.1. Future development under the Housing Element Update would be required to comply with the policies identified in Section

4.17.1.1, including those requiring future development to enhance existing bicycle and pedestrian facilities and construct or fund improvements to these facilities through payment of impact fees. As discussed above, implementation of MM TRN-1.1 would require preparation of individual transportation analyses that identify and rectify any inconsistencies with General Plan policies, including those addressing bicycle and pedestrian facilities. For these reasons, implementation of the Housing Element Update would not conflict with any programs, plans, ordinances, or policies addressing bicycle or pedestrian facilities. (Less than Significant Impact)

Impact TRN-2: The project would not conflict or be inconsistent with CEQA Guidelines Section 15064.3, subdivision (b). (Less than Significant Impact) This question pertains specifically to VMT as the means of analyzing the transportation impacts of a project. As described in Section 4.17.1.1, OPR has directed local jurisdictions to implement a VMT policy pursuant to SB 743. For purposes of this Initial Study, the City of San Bruno relies on OPR’s Technical Advisory on Evaluating Transportation Impacts in CEQA (dated December 2018), which recommends using a threshold of 15 percent below regional daily VMT per capita for residential 2023-2031 Housing Element Update 243 Initial Study
City of San Bruno December 2022 (Revised January 2023)
uses. Residential development in San Mateo County averages 13.8 daily VMT per resident, which equates to a threshold of 11.73 daily VMT per resident. Using the C/CAG VMT Estimation Tool, the VMT Analysis prepared by Hexagon Transportation Consultants (refer to Appendix C for more information on the assumptions, methodology, inputs, etc. used to estimate VMT generated by the project) estimated that buildout of the Housing Element Update would reduce VMT by 0.07 VMT per capita, and residential development at the Housing Opportunity Sites at the densities assumed by the Housing Element Update individually would not exceed 11.73 daily VMT per resident, and collectively would have an average weighted VMT of 11.67 per resident.[144][145] Therefore, buildout of the Housing Element Update would not conflict or be inconsistent with CEQA Guidelines Section 15064.3, subdivision (b).

Impact TRN-3: The project would not substantially increase hazards due to a geometric design feature (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm equipment). (Less than Significant Impact) Construction staging is presumed to occur within the boundaries of the Housing Opportunity Sites and outside of the public right-of-way. However, construction activity could result in temporary roadway and sidewalk closures, effects on roadway circulation due to construction trucks, an increase in vehicle trips and vehicular parking demand associated with construction workers, and relocation of bus stops and temporary transit detours. All future detailed construction plans would be required to undergo review by the San Bruno Fire Department before work begins. Temporary travel lane closures needed to make improvements to the street network would be coordinated with SamTrans and the City to reduce impacts on local circulation operations. These types of construction-related transportation impacts would be temporary, generally short term, and conducted in accordance with City permit requirements. Therefore, construction-related road closures, relocations, and modifications associated with future development under the Housing Element Update would not substantially increase hazards due to a geometric design feature.

As discussed under Impact TRN-1, all future development under the Housing Element Update would be required to prepare a TA prior to issuance of any discretionary permits which would include a review of the proposed layout for any geometric design features that may increase hazards, and recommendations to address any identified issues that would be incorporated into the final design.

All of the Housing Opportunity Sites are adjacent to residential uses, and therefore redevelopment of the sites with residential uses would not be incompatible. For these reasons, buildout of the Housing Element Update would not substantially increase hazards due to a geometric design feature or incompatible uses.
144 The 669 ‘pipeline’ units have already received discretionary entitlements and are excluded from this VMT analysis. Additionally, the location of the 240 ADUs is not foreseeable, as they can occur throughout the City in residentially zoned areas, and therefore evaluating their VMT would require speculation. 145 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study. 2023-2031 Housing Element Update 244 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact TRN-4: The project would not result in inadequate emergency access. (Less than Significant Impact)
Construction staging is presumed to occur within the boundaries of the Housing Opportunity Sites and outside of the public right-of-way. However, construction activity could result in temporary roadway and sidewalk closures, effects on roadway circulation due to construction trucks, an increase in vehicle trips and vehicular parking demand associated with construction workers, and relocation of bus stops and temporary transit detours. All future detailed construction plans would be required to undergo review by the San Bruno Fire Department before work begins. Temporary travel lane closures needed to make improvements to the street network would be coordinated with SamTrans and the City to reduce impacts on local circulation operations. These types of construction-related transportation impacts would be temporary, generally short term, and conducted in accordance with City permit requirements. Therefore, construction-related road closures, relocations, and modifications associated with redevelopment of the Housing Opportunity Sites would not result in inadequate emergency access.

As discussed under Impact TRN-1, all future development under the Housing Element Update would be required to prepare a TA prior to issuance of any discretionary permits which would identify any emergency access issues and provide recommendations addressing any issues that would be incorporated into the final design. As discussed in Section 4.9.2 under Impact HAZ-6, the Housing Element Update would not impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan, and all future development proposes would be reviewed by the San Bruno Fire Department prior to issuance of any construction or occupancy permits, whichever occurs first, for emergency access issues and consistency with California Building and Fire Codes. Accordingly, buildout of the Housing Element Update would not result in inadequate emergency access.
2023-2031 Housing Element Update 245 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.18 TRIBAL CULTURAL RESOURCES
The following discussion is based, in part, on a Cultural Resources Sensitivity Report prepared for the project by Archaeological/Historical Consultants, Inc. The report, dated September 2022, is on file with the Community and Economic Development Department.

4.18.1 Environmental Setting

4.18.1.1 Regulatory Framework
State
Senate Bill 18
The intent of SB 18 is to aid in the protection of traditional tribal cultural places through local land use planning by requiring city governments to consult with California Native American tribes on projects which include adoption or amendment of general plans (defined in Government Code Section 65300 et seq.) and specific plans (defined in Government Code Section 65450 et seq.). SB 18 requires local governments to consult with tribes prior to making certain planning decisions and to provide notice to tribes at certain key points in the planning process.

Assembly Bill 52
AB 52, effective July 2015, established a new category of resources for consideration by public agencies called Tribal Cultural Resources (TCRs). AB 52 requires lead agencies to provide notice of projects to tribes that are traditionally and culturally affiliated with the geographic area if they have requested to be notified. Where a project may have a significant impact on a tribal cultural resource, consultation is required until the parties agree to measures to mitigate or avoid a significant effect on a tribal cultural resource or until it is concluded that mutual agreement cannot be reached.

Under AB 52, TCRs are defined as follows:
• Sites, features, places, cultural landscapes, sacred places, and objects with cultural value to a California Native American tribe that are also either:
• Included or determined to be eligible for inclusion in the California Register of Historic Resources, or
• Included in a local register of historical resources as defined in Public Resources Code Section 5020.1(k).
• A resource determined by the lead agency to be a TCR.

Local
City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating impacts on tribal cultural resources resulting from planned development within the City including the following:
2023-2031 Housing Element Update 246 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
ERC-F Preserve and enhance historic and cultural resources within the City, particularly within the historic Downtown area.

ERC-39 Continue to protect archaeological sites and resources from damage. Require that areas found to contain significant indigenous artifacts be examined by a qualified archaeologist for recommendations concerning protection and preservation.

ERC-44 If, prior to grading or construction activity, an area is determined to be sensitive for paleontological resources, retain a qualified paleontologist to recommend appropriate actions. Appropriate action may include avoidance, preservation in place, excavation, documentation, and/or data recovery, and shall always include preparation of a written report documenting the find and describing steps taken to evaluate and protect significant resources.

Bayhill Specific Plan
As noted in Section 3.1.1.1, Housing Opportunity Sites 3 and 13 are located within the Bayhill Specific Plan area. Chapter Six of the Bayhill Specific Plan includes mandatory “Environmental Quality Policies”, including the following which pertain to cultural resources.

Policy 6-27
Policy 6-27 requires preparation of an Archaeological Monitoring Plan (AMP) by a qualified professional archaeologist prior to any project-related ground disturbance that outlines areas of archaeological sensitivity, if any, and includes protocol to follow if unanticipated archaeological or tribal cultural resources are encountered.

Policy 6-28
Policy 6-28 requires construction contractors to be trained in recognizing archaeological and tribal cultural resources.

Policy 6-29
Policy 6-29 requires all work to stop immediately if archaeological or tribal cultural resources are discovered during construction.

Policy 6-30
Policy 6-30 includes similar protections for human remains of Native American origin discovered during construction.

4.18.1.2 Existing Conditions
In Northern California, human occupation extends back to at least 9,000-11,500 years with Native American occupation and use of the Bay Area extending over 5,000-8,000 years and possibly longer.

Native Americans at the time of Euro-American contact tended to live along the alluvial terraces and along historic Bay margins, there is potential for the discovery of Native American cultural resources within the City. Native American cultural resources have also been found in San Mateo County near sources of fresh water, including streams and creeks. All of the Housing Opportunity Sites are or 2023-2031 Housing Element Update 247 Initial Study
City of San Bruno December 2022 (Revised January 2023)
have previously been developed, and there are no known archaeological or tribal cultural resources at any of the Housing Opportunity Sites.

As part of the Cultural Resources Sensitivity Report (refer to the discussion in Section 4.5.1.2), Archaeological/Historical Consultants obtained a Sacred Lands File Search from the NAHC, which identified eight tribes affiliated with San Mateo County. Letters were sent to the identified tribes on May 18, 2022 inviting them to consult under SB 18 and AB 52. One response was received on May 21 from Michelle Zimmer on behalf of the Amah Mutsun Band of San Juan Bautista that requested the results of the records search of the Northwest Information Center’s archives and for more information. A response email was sent on May 24; no further correspondence was received. On July 29, follow-up phone calls and emails were completed. Follow-up emails were again sent on August 16, and recipients were asked to comment by Friday, August 19, if they were interested in consulting under SB 18 and/or AB 52. The 90-day period to request consultation under SB 18 ended on August

16. No tribal cultural resources were identified by any of the contacted tribes, and none of the tribes affiliated with San Mateo County requested to be consulted regarding the project under SB 18 or AB

52. 4.18.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project cause a substantial adverse
change in the significance of a tribal cultural
resource, defined in Public Resources Code
Section 21074 as either a site, feature, place,
cultural landscape that is geographically defined in
terms of the size and scope of the landscape,
sacred place, or object with cultural value to a
California Native American tribe, and that is:
1) Listed or eligible for listing in the California
Register of Historical Resources, or in a local
register of historical resources as defined in
Public Resources Code Section 5020.1(k)?
2) A resource determined by the lead agency, in
its discretion and supported by substantial
evidence, to be significant pursuant to criteria
set forth in subdivision I of Public Resources
Code Section 5024.1? In applying the criteria
set forth in subdivision(c) of Public Resources
Code Section 5024.1, the lead agency shall
consider the significance of the resource to a
California Native American tribe.
2023-2031 Housing Element Update 248 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Impact TCR-1: The project would not cause a substantial adverse change in the significance of a tribal cultural resource that is listed or eligible for listing in the California Register of Historical Resources, or in a local register of historical resources as defined in Public Resources Code Section 5020.1(k). (Less than Significant Impact)
As documented in Section 4.18.1.2 Existing Conditions, no known archaeological or tribal cultural resources are present at any of the Housing Opportunity Sites. No tribes have requested consultation or otherwise indicated the presence or likely presence of TCRs on the site. Future development of the Housing Opportunity Sites would therefore not cause a substantial adverse change in the significance of a tribal cultural resource that is listed or eligible for listing in the California Register of Historical Resources, or in a local register of historical resources as defined in Public Resources Code Section 5020.1(k).

Impact TCR-2: The project would not cause a substantial adverse change in the significance of a tribal cultural resource that is determined by the lead agency, in its discretion and supported by substantial evidence, to be significant pursuant to criteria set forth in s subdivision (c) of Public Resources Code Section 5024.1. (Less than Significant Impact with Mitigation Incorporated) As discussed in Section 4.18.1.1, tribal cultural resources can be sites, features, places, cultural landscapes, sacred places, and objects with cultural value to a California Native American tribe, or any resource determined by the Lead Agency to be a TCR.

As discussed in Section 4.18.1.2, there are no known archaeological or tribal cultural resources on any of the Housing Opportunity Sites, and no tribes affiliated with San Mateo County identified any tribal cultural resources in response to SB 18 and AB 52 outreach efforts.

As discussed in Section 4.5 Cultural Resources, Sites 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 15, 16 17, 18, 19, 20, 22, and 23 are sensitive for prehistoric-era archaeological resources. Despite a low sensitivity for archaeological resources, redevelopment of Sites 8 and 14 with residential uses has the potential to encounter undiscovered subsurface objects or human remains that may constitute a tribal cultural resource during ground-disturbing activities. Per the discussion in Section 4.5 under Impact CUL-2, implementation of MM CUL-2.1, MM CUL-2.2, MM CUL-2.3, and TCP Mitigation Measure 7-1 would ensure that any undiscovered subsurface resources encountered at any of the Housing Opportunity Sites during ground-disturbing activities are identified, evaluated, and appropriately treated in accordance with the recommendations of a qualified archaeologist and the requirements of CEQA. Per the discussion in Section 4.5 under Impact CUL-3, adherence with MM CUL-3.1 and Bayhill Specific Plan Policy 6-30 would ensure that any human remains encountered during ground-disturbing activities that are determined to be Native American in origin by the County coroner would be treated in accordance with the guidelines of the NAHC. For these reasons, implementation of the Housing Element as amended by MM CUL-2.1, MM CUL-2.2, MM CUL-2.3, and MM CUL-3.1 would ensure that future development under the Housing Element Update does not cause a substantial adverse change in the significance of a tribal cultural resource, if inadvertently encountered during construction at any of the Housing Opportunity Sites. 2023-2031 Housing Element Update 249 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.19 UTILITIES AND SERVICE SYSTEMS
The following discussion is based, in part, on a Water Supply Assessment prepared for the Housing Element Update by West Yost & Associates, Inc. A copy of this report, dated June 2022, is attached to this Initial Study as Appendix E.

4.19.1 Environmental Setting

4.19.1.1 Regulatory Framework
State
State Water Code
Pursuant to the State Water Code (Section 10635), water suppliers providing water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre-feet (approximately 980 million gallons) of water annually must prepare and adopt an urban water management plan (UWMP) and update it every five years. As part of a UWMP, water agencies are required to evaluate and describe their water resource supplies and projected needs over a 20-year planning horizon, water conservation, water service reliability, water recycling, opportunities for water transfers, and contingency plans for drought events. The San Francisco Public Utilities Commission (SFPUC), which supplies water supplies to the City of San Bruno, adopted its most recent UWMP in April 2021.

Bay-Delta Plan Amendment
In December 2018, the SWRCB adopted amendments to the Water Quality Control Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary (Bay-Delta Plan Amendment) to establish water quality objectives to maintain the health of the Bay-Delta ecosystem. The adopted Bay-Delta Plan Amendment was developed with the stated goal of increasing salmonid populations in three San Joaquin River tributaries (the Stanislaus, Merced, and Tuolumne Rivers) and the Bay-Delta. The Bay-Delta Plan Amendment requires the release of 30 to 50 percent of the “unimpaired flow” on the three tributaries from February through June in every year type.

If the Bay-Delta Plan Amendment is implemented, the SFPUC will be able to meet the projected water demands presented in the 2021 UWMP in normal years but would experience supply shortages in single dry years or multiple dry years. Implementation of the Bay-Delta Plan Amendment will require rationing in all single dry years and multiple dry years. The SFPUC has initiated an Alternative Water Supply Planning Program to ensure that it can meet its retail and wholesale customer water needs, address projected dry years shortages, and limit rationing to a maximum 20 percent system-wide in accordance with adopted SFPUC policies.

There is much uncertainty surrounding implementation of the Bay-Delta Plan Amendment. Since adoption of the Bay-Delta Plan Amendment, over a dozen lawsuits have been filed in both federal and state courts, challenging the SWRCB’s adoption of the Bay-Delta Plan Amendment, including a legal challenge filed by the federal government, at the request of the U.S. Department of Interior, Bureau of Reclamation. This litigation is in the early stages and there have been no dispositive court rulings as of this date.
2023-2031 Housing Element Update 250 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Assembly Bill 341
AB 341 sets forth the requirements of the statewide mandatory commercial recycling program Businesses that generate four or more cubic yards of garbage per week and multi-family dwellings with five or more units in California are required to recycle. AB 341 sets a statewide goal for 75 percent disposal reduction by the year 2020.

Assembly Bill 939
The California Integrated Waste Management Act of 1989, or AB 939, established the Integrated Waste Management Board, required the implementation of integrated waste management plans, and mandated that local jurisdictions divert at least 50 percent of solid waste generated (from 1990 levels), beginning January 1, 2000, and divert at least 75 percent by 2010. Projects that would have an adverse effect on waste diversion goals are required to include waste diversion mitigation measures.

Assembly Bill 1826
Assembly Bill 1826 (AB 1826) requires that state agencies, businesses, and multifamily complexes that generate specific quantities of organic or solid waste each week enroll in organic recycling programs through an applicable solid waste disposal company. Organic recycling programs may take the form of composting, mulching, or anaerobic digestion. Businesses and multi-family residential housing complexes that generate the following quantities are required to implement organic or solid waste recycling programs under AB 1826:
• Eight or more cubic yards of organic waste per week as of April 1, 2016; • Four of more cubic yards of organic waste per week as of January 1, 2017; • Four or more cubic yards of solid waste per week as of January 1, 2019; and • Two or more cubic yards of solid waste per week as of January 1, 2020, if statewide disposal of organic waste is not reduced by half.

CalRecycle is currently evaluating whether California has achieved its statewide organic disposal goal of reducing organic waste disposal to 50 percent of 2014 levels by 2020. If this goal is not achieved, organic composting and recycling requirements will be expanded such that businesses that generate two or more cubic yards of solid waste per week must comply.

Senate Bill 221
SB 221 prohibits approval of subdivisions consisting of more than 500 dwelling units unless there is verification of sufficient water supplies for the project from the applicable water supplier(s). This requirement also applies to increases of 10 percent or more of service connections for public water systems with fewer than 500 service connections. The law defines criteria for determining “sufficient water supply,” such as using normal, single-dry, and multiple-dry year hydrology and identifying the amount of water that the suppler can reasonably rely on to meet existing and future planned use. 2023-2031 Housing Element Update 251 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Senate Bill 610
SB 610 requires that certain large projects subject to CEQA prepare a specified Water Supply Assessment (WSA). The WSA must be furnished to the local government for inclusion in any environmental documentation for certain projects (as defined in Water Code 10912[a]) subject to CEQA. This legislation also expands the requirements for certain types of information in an UWMP, including an identification of any existing water supply entitlements, water rights, or water service contracts held relevant to the WSA for a proposed project, and a description of water deliveries received in prior years.

Senate Bill 1383
SB 1383 establishes targets to achieve a 50 percent reduction in the level of the statewide disposal of organic waste from the 2014 level by 2020 and a 75 percent reduction by 2025. The bill grants CalRecycle the regulatory authority required to achieve the organic waste disposal reduction targets and establishes an additional target that at least 20 percent of currently disposed edible food is recovered for human consumption by 2025.

California Green Building Standards Code
In January 2010, the State of California adopted the California Green Building Standards Code, establishing mandatory green building standards for all buildings in California. A recent update of these standards was published in July 2019 and went into effect on January 1, 2020. The code covers five categories: planning and design, energy efficiency, water efficiency and conservation, material conservation and resource efficiency, and indoor environmental quality. These standards include the following mandatory set of measures, as well as more rigorous voluntary guidelines, for new construction projects to achieve specific green building performance levels:
• Reducing indoor water use by 20 percent;
• Reducing wastewater by 20 percent;
• Recycling and/or salvaging 50 percent of nonhazardous construction and demolition debris; and
• Providing readily accessible areas for recycling by occupants.

Regional
SFPUC Right-of-Way Policies
The SFPUC owns and manages land and water system infrastructure for its own exclusive use that is part of the Hetch Hetchy Regional Water System. The primary use of SFPUC lands and easements is for the delivery, operation, maintenance and protection of water, power, and sewer systems. The SFPUC has adopted guidelines to help inform how and in which instances the easements can serve the needs of public agencies, private parties, nonprofit organizations, and developers, while maintaining the safety and security of the SFPUC pipelines. SFPUC guidelines pertain to land use and structures, recreational use, utilities, vegetation, and water efficiency. The easements also are subject to terms and restrictions regarding use of land contained in the original deeds granting the easements to the SFPUC.
2023-2031 Housing Element Update 252 Initial Study
City of San Bruno December 2022 (Revised January 2023)
SFPUC Water System Improvement Program
SFPUC’s Water System Improvement Program (WSIP) was approved on October 31, 2008, with the purpose of improving the delivery reliability of the Regional Water System (RWS) that is operated by SFPUC. The objectives of the WSIP related to water supply are listed below. • Meet average annual water demand of 265 million gallons daily (MGD) from the SFPUC watersheds for retail and wholesale customers during non-drought years for system demands consistent with the 2009 Water Supply Agreement.
• Meet dry-year delivery needs while limiting rationing to a maximum 20 percent system-wide reduction in water service during extended droughts.
• Diversify water supply options during non-drought and drought periods. • Improve use of new water sources and drought management, including groundwater, recycled water, conservation, and transfers.

The WSIP provides benefits to the City by improving the reliability of wholesale water purchased from SFPUC, especially during periods of drought. The program aims to meet customer water needs in non- drought and drought conditions and provides dry-year water supply projects to augment all year type water supplies during drought. As of August 2021, the WSIP was approximately 99 percent complete; the currently forecasted date to complete the overall WSIP is May 2023.

South Westside Basin Groundwater Management Plan
The South Westside Basin Groundwater Management Plan (GWMP), completed in July 2012, includes strategies and recommendations that guide planning decisions in a manner that preserves groundwater within the South Westside Groundwater Basin, which supplies groundwater to the City of San Bruno. The GWMP indicates that the basin is not in overdraft and the City can pump at a rate of 2.1 MGD on a long-term basis.

Regional Groundwater Storage and Recovery Project
In December 2014, the Regional Groundwater Storage and Recovery (GSR) Project operating agreement was signed to ensure long-term management and sustainability of the South Westside Groundwater Basin through a strategic conjunctive use partnership. The partnership with the City of San Bruno, SFPUC, California Water Service (serving South San Francisco and Colma), and the City of Daly City allows the agencies to operate the basin jointly and provides a new 20-billion-gallon regional dry year groundwater supply. The project is included as part of the SFPUC WSIP described above. The City of San Bruno implemented conjunctive use operations starting in 2016.

The Regional GSR Project is an in-lieu groundwater recharge program that balances groundwater and the SFPUC RWS to increase drought year water supplies. Under the Regional GSR Project, the City operates under two supply modes that vary according to hydrologic conditions. During wet and normal years (“put” operations), SFPUC provides additional surface water to the City to reduce the City’s groundwater pumping. The additional supply is stored in the South Westside Basin as 2023-2031 Housing Element Update 253 Initial Study
City of San Bruno December 2022 (Revised January 2023)
groundwater until it is needed during a drought or emergency. During dry years (“take” operations), the City utilizes available groundwater supplies and reduces surface water deliveries, thereby freeing surface water supply to be delivered to other SFPUC customers.

Local
City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating impacts on utilities and service systems resulting from planned development within the City including the following:

Policies Description
PFS-3 Require, as part of plan review, identification of needed public service improvement and maintenance costs for those projects that may have a significant impact on existing services.

PFS-8 Require expansion of the City’s water distribution system proportionate with new development’s fair share of demand.

PFS-9 Upgrade the water distribution system as necessary to provide adequate water pressure to meet fire safety standards and to respond to emergency peak water supply needs.

PFS-17 Ensure that new or expanded water supply and transmission facilities are constructed in a manner in which construction and operation impacts are minimized or avoided.

PFS-20 Require expansion of the City’s sewer collection system proportionate with new development’s fair share of demand.

PFS-21 Upgrade or replace sewer lines to accommodate anticipated flows and to prevent overflows.

Upgrade sewer lift stations as needed.

PFS-31 Ensure adequate fire water pressure as a condition of approval for all new development projects.

PFS-66 Enforce landscape requirements that facilitate efficient energy use or conservation, such as drought-resistant landscaping and/or deciduous trees along southern exposures.

PFS-70 Facilitate environmentally sensitive construction practices by:
• Restricting use of chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons in mechanical equipment and building materials; • Promoting use of products that are durable and allow efficient end-of-life disposal (e.g. reusable, recyclable, biodegradable);
• Promoting the purchase of locally or regionally available materials; and • Promoting the use of cost-effective design and construction strategies that reduce resource and environmental impacts.

PFS-72 Work with utility providers to ensure that adequate electrical and natural gas facilities and services are available to meet the demands of existing and future development.

PFS-73 Provide for utility access and prevent easement encroachments that might impair the safe and reliable maintenance and operation of utility facilities.

PFS-74 Work with telecommunication providers to ensure that telecommunications service is available for existing and future development.
2023-2031 Housing Element Update 254 Initial Study
City of San Bruno December 2022 (Revised January 2023)
City of San Bruno Water System Master Plan
The City’s 2020 Water System Master Plan (WSMP), dated December 2021, served as an update to the City’s 2012 Water Service Master Plan and provides a comprehensive road map for the City’s water system through 2040. In addition to assessing the City’s projected supply and demand through 2040, the 2020 WSMP updated the City’s hydraulic model and evaluated the performance of the existing and future water system under existing and 2040 buildout water demand conditions. Based on the results of the performance analysis, the 2020 WSMP identified pipeline and facility rehabilitation and replacement projects. The 2020 WSMP also included a Water Shortage Contingency Plan (WSCP), a six-stage plan describing specific actions to reduce water demand by greater than 50 percent in the event of a water supply shortage or emergency.

City of San Bruno Sanitary Sewer Management Plan / Sewer Master Plan Two documents govern San Bruno’s sewer systems, 1) City of San Bruno Sewer Master Plan, dated February 2014, and; 2) City of San Bruno Sewer System Management Plan, dated October 2019. The February 2014 Sewer Master Plan was a legally mandated update to the 2000 Master Plan, and provides a sewer system condition assessment, a Capacity Assurance Plan, and a long-range Capital Improvement Program for the City’s sewer system. The Sewer System Management Plan complements the Sewer Master Plan by providing policies, procedures, and activities related to the planning, management, operation, and maintenance of the City’s sanitary sewer system.

City of San Bruno Storm Drain Master Plan
To identify and address potential flood risks in the City of San Bruno, a Storm Drain Master Plan was adopted by the City in June 2014. In addition to updating the City’s flood control guiding document, the Master Plan defines a new Capital Improvement Program to address the storm drain system’s capacity deficiencies.

4.19.1.2 Existing Conditions
Water Supply, Demand, and Conveyance
The City of San Bruno purchases treated surface water from SFPUC and North Coast County Water District (NCCWD) and delivers water to its customers through its water distribution system, which consists of 100 miles of pipelines, 9,000 valves, 985 fire hydrants, eight pumping stations, eight storage tanks, and 13 pressure zones. SFPUC water supplies are primarily derived from the Hetch Hetchy watershed within Yosemite National Park and subsequent downstream reservoirs, with the remaining SFPUC water supplies originating locally within the Bay Area. SFPUC provides an Individual Supply Guarantee of 3.25 MGD to the City of San Bruno, and a collective 184 MGD Individual Supply Guarantee to all members, including the City of San Bruno. Purchased NCCWD water only supplies the Crystal Springs Terrace Apartments located at 2000 Crystal Springs Road, which is not one of the Housing Opportunity Sites and therefore is not discussed further.

The City of San Bruno also obtains water locally from South Westside Basin groundwater resources.

Most of the City of San Bruno is underlain by the South Westside Basin, which produces approximately 8,600 acre-feet of water annually and is ranked as a Very Low priority basin. As a Very Low priority basin, the Westside Basin users are not mandated to form a Groundwater 2023-2031 Housing Element Update 255 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Sustainability Agency or develop a Groundwater Sustainability Plan. More information regarding the physical conditions of the South Westside Basin, as well as further details regarding the hydrological setting within the City of San Bruno, are included in Section 4.10 of this Initial Study. The City currently operates four groundwater wells. Prior to 2016, groundwater use comprised about 50 percent of the City’s total water supply. In 2016, the City reduced its use of groundwater to about 10 percent of its total water supply in accordance with the Regional GSR Project (refer to Section

4.19.1.1). The City’s groundwater production through the year 2031 is projected to remain at 2.10 MGD.

Wastewater Generation, Conveyance, and Treatment
The City of San Bruno owns and maintains the sanitary sewer conveyance system within City limits and is responsible for sewer system operation and maintenance therein. Wastewater is transported through this conveyance system to the Shaw Road Pump Station from two sewer pipeline segments:
one located near Tanforan Avenue, and the other at 7th Avenue. Wastewater is then transported from the South San Francisco Shaw Road Sewage Pump Station, ultimately to the South San Francisco/San Bruno Water Quality Control Plant (WQCP) in South San Francisco for treatment.

The WQCP processes wastewater discharge for the Cities of South San Francisco, San Bruno, and the Town of Colma. There is no formal agreement about the proportion of wastewater treatment capacity entitled to each city, however, the agreement is specific that the share of operating costs is proportional to use.

During dry weather conditions, the WQCP has a peak flow capacity of 13 MGD of wastewater, which is increased to a peak capacity of 62 MGD during wet weather flow conditions; average dryweather flows at the WQCP are approximately 9 MGD, and average peak weather flows can exceed 60 MGD. To accommodate peak wet-weather flows, the WQCP is in the process of conducting facility improvements, which would include installation of a new storage basin to retain excess flows during wet-weather conditions. Currently, the City of San Bruno generates an average of approximately 2.146 MGD of dry-weather wastewater which is eventually conveyed to and treated at the South San Francisco/San Bruno WQCP from both the Tanforan Avenue and 7th Avenue systems, and has an allocated dry-weather capacity of 3.5 MGD at the WQCP.146 The City generates a peak wet weather flow of approximately 20.3 MGD; the City does not have an allocated wet weather capacity at the South San Francisco/San Bruno WQCP.

Storm Drain System
San Bruno’s Public Works Department Streets and Stormwater Division operates and maintains the storm drainage system in the City, which consists of underground pipes and culverts, as well as aboveground channels. The City of San Bruno contains six watersheds that drain the City. The City’s primary drainage basins—Crystal Springs Creek, Huntington Creek, and San Bruno Creek— encompass 80 percent of San Bruno’s land area. The storm drainage system generally drains eastward towards the San Bruno Channel, which discharges into the San Francisco Bay. 146 Schumacker, Brian. Plant Superintendent. South San Francisco/San Bruno Water Quality Control Plant (WQCP).

Personal communication. December 20, 2021.
2023-2031 Housing Element Update 256 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Solid Waste Generation, Collection, and Disposal
Recology San Bruno (Solid Waste Information System (SWIS) ID 41-AA-0014) provides solid waste disposal services citywide, including garbage, recycling, and organic composting services.

Recology San Bruno transports solid waste to the San Bruno Transfer Station at 101 Tanforan Avenue, where solid waste is processed, treated, and transported to other disposal facilities. The San Bruno Transfer Station has a maximum permitted capacity of 768 tons of solid waste per day. From the San Bruno Transfer Station, most of the City’s solid waste is transported via trucks to Corinda Los Trancos Landfill (SWIS 41- AA-0002, formerly Ox Mountain Landfill) in Half Moon Bay, which has a remaining capacity of 22,180,000 cubic yards and serves the City of San Bruno as well as numerous other Bay Area jurisdictions. However, the City distributes limited quantities of its solid waste to numerous other Class III (non-hazardous) landfill facilities. All municipal Class III landfills that received City of San Bruno solid waste in 2018, the year with the most recent available data, are identified below in Table 4.19-1. While the City may have disposed of any permitted type of solid waste, including hazardous wastes at any of these facilities in 2018, only remaining municipal Class III disposal capacity is displayed.

Table 4.19-1: Capacity at Class III Landfill Facilities Facility (SWIS ID) Remaining Capacity Permitted Through Altamont Landfill & Resource
Recovery (01-AA-0009) 65,400,000 January 1, 2025
Corinda Los Trancos Landfill
(41-AA-0002) 22,180,000 January 1, 2034
Fink Road Landfill (50-AA0001) 7,184,701 December 1, 2023 Guadalupe Sanitary Landfill
(50-AA-0001) 11,055,000 January 1, 2048
Monterey Peninsula Landfill
(50-AA-0001) 48,560,000 February 28, 2107
Newby Island Sanitary
Landfill (50-AA-0001) 21,200,000 January 1, 2041
Potrero Hills Landfill (50-AA0001) 13,872,000 February 14, 2048 Recology Hay Road (50-AA0001) 30,433,000 January 1, 2077 Recology Ostrom Road LF
Inc. (50-AA-0001) 39,223,000 December 31, 2066
Vasco Road Sanitary Landfill
(50-AA-0001) 7,379,000 December 31, 2022
Sources:

CalRecycle. “Jurisdiction Disposal by Facility With Reported Alternative Daily Cover (ADC) and Alternative Intermediate Cover (AIC): Disposal During 2018 for San Bruno”. Accessed October 17, 2022. https://www2.calrecycle.ca.gov/LGCentral/DisposalReporting/Destination/DisposalByFacility 2023-2031 Housing Element Update 257 Initial Study
City of San Bruno December 2022 (Revised January 2023)
CalRecycle. “SWIS Facility/Site Search.” Accessed October 17, 2022. https://www2.calrecycle.ca.gov/SolidWaste/Site/Search
In 2021, the City of San Bruno generated 30,621 tons of solid waste, with residents generating approximately 4.4 pounds of solid waste per capita per day and employees generating 10.7 pounds of solid waste per capita per day. CalRecycle’s 2021 disposal goals for the City of San Bruno were 4.5 pounds per day for residents; therefore, the City of San Bruno met its per capita solid waste diversion goals in 2021.147 Per capita solid waste generation in the City has decreased over time due to numerous waste diversion programs, including source reduction, recycling, composting, incentivization, and public education initiatives.

Electricity, Natural Gas, and Telecommunication Services Electrical power is provided by PG&E to the City of San Bruno from eight different distribution feeders: four feeders are from the Sneath Lane substation in San Bruno, two feeders are from the East Grand substation in South San Francisco, one is fed from the Airport substation, and one originates from the Millbrae substation in Millbrae. Most of these feeders also serve other cities, including Pacifica, Millbrae, and South San Francisco, and are linked to other distribution feeders, assuring greater reliability.

Natural gas is provided to the City of San Bruno by PG&E from three gas lines stretching from Milpitas to San Francisco. Gas is delivered from basins in Canada and/or Texas by transmission mains and deposited at PG&E’s Milpitas Gas Terminal.

Telecommunication services is provided throughout San Bruno via underground coaxial, hardwire, and fiber optic systems operated by CityNet Services.

4.19.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
1) Require or result in the relocation or
construction of new or expanded water,
wastewater treatment or stormwater drainage,
electric power, natural gas, or
telecommunications facilities, the construction
or relocation of which could cause significant
environmental effects?
2) Have insufficient water supplies available to
serve the project and reasonably foreseeable
future development during normal, dry and
multiple dry years?
147 CalRecycle. “Disposal Rate Calculator (San Bruno, 2021)”. Accessed October 19, 2022. https://www2.calrecycle.ca.gov/LGCentral/AnnualReporting/DisposalRateCalculator. 2023-2031 Housing Element Update 258 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
Would the project:
3) Result in a determination by the wastewater
treatment provider which serves or may serve
the project that it does not have adequate
capacity to serve the project’s projected
demand in addition to the provider’s existing
commitments?
4) Generate solid waste in excess of state or local
standards, or in excess of the capacity of local
infrastructure, or otherwise impair the
attainment of solid waste reduction goals?
5) Be noncompliant with federal, state, or local
management and reduction statutes and
regulations related to solid waste?
Impact UTL-1: The project would not require or result in the relocation or construction of new or expanded water, wastewater treatment or stormwater drainage, electric power, natural gas, or telecommunications facilities, the construction or relocation of which could cause significant environmental effects. (Less than Significant Impact)
Water Facilities
Pursuant to the discussion under Impact UTL-2, sufficient water supplies are available to serve buildout of the Housing Element Update; therefore the construction of new or expanded water facilities, such as additional groundwater wells, to increase water supplies would not be required or result from buildout of the project.

As discussed in Section 4.19.1.1, the 2020 WSMP assessed the City’s hydraulic model and evaluated the performance of the existing and future water system under existing and 2040 buildout water demand conditions, including buildout of the General Plan, TCP, and Bayhill Specific Plan. The 2020 WSMP identified pipeline and facility rehabilitation and replacement projects, which future development under the Housing Element Update would contribute to through the payment of development impact fees. Buildout of the Housing Element Update is not anticipated to require or result in any additional improvements beyond those identified in the 2020 WSMP except those needed to meet project-specific fire flow and water system design specifications, such as installing larger pipes in the adjacent public right-of-way. The construction of these facilities would be completed in accordance with Public Works requirements pursuant to the review of the City’s Engineering and Construction Division, and in accordance with the regulations and measures identified throughout this Initial Study to control fugitive dust generation, dewatering of potentially contaminated water, sedimentation, erosion, and traffic control. Redevelopment of Site 14 with up to 1,000 residential units represents new residential water demand beyond what is assumed in the current General Plan and would be subject to these same controls and is not anticipated to generate a 2023-2031 Housing Element Update 259 Initial Study
City of San Bruno December 2022 (Revised January 2023)
significant increase in water demand or design needs beyond what is required by the existing Shops at Tanforan development. For these reasons, the construction or relocation of any water facilities as a result of the Housing Element Update would not cause any significant environmental effects. (Less than Significant Impact)
Wastewater Treatment Facilities
Pursuant to the discussion under Impact UTL-3, adequate capacity exists to treat increases in wastewater generation associated with buildout of the Housing Element Update. Improvements to the City’s wastewater treatment facilities are identified in the City’s Sewer System Management Plan prepared in February 2019, which future development under the Housing Element Update would contribute to through the payment of development impact fees. Buildout of the Housing Element Update is not anticipated to require any additional improvements beyond those identified in the Sewer System Management Plan except the installation of larger pipes on-site and in the public rightof-way to accommodate larger flows. These improvements would be completed in accordance with Public Works requirements pursuant to the review of the City’s Engineering and Construction Division, and in accordance with the regulations and measures identified throughout this Initial Study to control fugitive dust generation, dewatering of potentially contaminated water, sedimentation, erosion, and traffic control. Redevelopment of Site 14 with up to 1,000 residential units represents new residential water demand and wastewater generation beyond what is assumed in the current General Plan and would be subject to these same controls and is not anticipated to generate a significant increase in wastewater flows beyond what is generated by the existing Shops at Tanforan development. For these reasons, the construction or relocation of any wastewater facilities as a result of the Housing Element Update would not cause any significant environmental effects. (Less than Significant Impact)
Stormwater Facilities
Improvements to the City’s stormwater facilities are identified in the City’s Storm Drain Master Plan (refer to Section 4.19.1.1), which future development under the Housing Element Update would contribute to through the payment of development impact fees. Buildout of the Housing Element Update is not anticipated to require any additional improvements beyond those identified in the Storm Drain Master Plan besides the installation of new catch basins, storm drains and associated minor infrastructure on-site as needed to address changes in pervious and impervious surfaces and associated drainage patterns. Pursuant to the discussion in Section 4.10 Hydrology and Water Quality under Impact HYD-3, the construction of new housing would not substantially alter the drainage pattern of any of the Housing Opportunity Sites in a manner which would result in on or offsite erosion, flooding, or runoff impacts. Further, any stormwater improvements necessary to serve new residential development would be constructed in accordance with Public Works requirements pursuant to the review of the City’s Engineering and Construction Division, and in accordance with the regulations and measures identified throughout this Initial Study to control fugitive dust generation, dewatering of potentially contaminated water, sedimentation, erosion, and traffic control.

For these reasons, the construction or relocation of any stormwater facilities as a result of the Housing Element Update would not cause any significant environmental effects. (Less than Significant Impact)
2023-2031 Housing Element Update 260 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Electric Power, Natural Gas, and Telecommunication Facilities Existing electric power, natural gas, and telecommunication facilities are available to all of the Housing Opportunity Sites. Future development under the Housing Element Update would be prohibited from using natural gas, and electric power and telecommunication facilities are sufficient to meet the demands of redevelopment of the Housing Opportunity Sites with residential uses at the at the densities assumed by the Housing Element Update. Further, all future development under the Housing Element Update would be required by the General Plan (refer to Section 4.19.1.1) to coordinate with PG&E and CityNet Services to ensure safe and reliable maintenance and operation of electric power and telecommunication facilities during construction and operation. The construction or relocation of any electric power or telecommunication facilities or the relocation of natural gas facilities during construction would be done in consultation with PG&E and CityNet Services and in accordance with the regulations and measures identified throughout this Initial Study to control fugitive dust generation, dewatering of potentially contaminated water, sedimentation, erosion, and traffic control. For these reasons, the construction or relocation of any electric power, natural gas, or telecommunication facilities as a result of the Housing Element Update would not cause any significant environmental effects. (Less than Significant Impact) Impact UTL-2: The project would not have insufficient water supplies available to serve the project and reasonably foreseeable future development during normal, dry and multiple dry years. (Less than Significant Impact)
The 2020 WSMP (refer to Section 4.19.1.1) assessed the City’s projected supply and demand through 2040 based on existing land uses and the projected buildout of the TCP and Bayhill Specific Plan sites, and found that water supplies were available to serve existing uses and buildout of these sites. As shown in Table 3.2-1, redevelopment of the TCP and Bayhill Specific Plan sites with residential uses at the densities assumed by the 2020 WSMP and Housing Element Update would result in the construction of 1,494 housing units. In addition to these 1,494 housing units (the water demand of which was analyzed in the 2020 WSMP), implementation of the Housing Element Update would redevelop Sites 6, 8, 10, 14, 16, 18, and 19 with up to 1,214 housing units.148 Additionally, the WSA prepared for the Housing Element Update factored in the water demand generated by construction of the pipeline projects identified by the City (669 housing units) and 240 ADUs (refer to the discussion in Section 3.2.1). In total, the WSA analyzed the City’s projected water supply and demand through the year 2045 (including the TCP and Bayhill Specific Plan sites) plus buildout of an additional 2,229 housing units as a result of the Housing Element Update, for a total of 3,618 units. The estimated water demand of the additional 2,229 housing units is reported below in Table

4.19-2. Additional information on the assumptions and methodology used to estimate the project’s water demand is provided in Appendix E.
148 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study. 2023-2031 Housing Element Update 261 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Table 4.19-2: Estimated Water Demand Increase of the Housing Element Update Housing Opportunity
Site/Category
Number of
Housing Units
Water Use
Factor
(gpd/du)1
Water Demand
(gpd)
Site 6 118 147 17,346
Site 82 15 147 2,205
Site 10 2 147 294
Site 14 1,000 147 147,000
Site 16 2 147 294
Site 18 15 147 2,205
Site 19 60 147 8,820
Pipeline Projects 670 147 98,490
Accessory Dwelling Units 240 147 35,280
Housing Element Update Totals 2,122 -- 311,934
Source: West Yost & Associates, Inc. City of San Bruno Housing Element Update Water Supply Assessment.

June 2022.

Notes:
1 Water use factors include 8 percent of non-revenue water. Because the density of proposed housing units at each site is unknown, this WSA conservatively assumes that all proposed units are single-family residences (i.e., higher water use).
2 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study.

As shown in Table 4.19-2, the Housing Element Update would increase water demand by 311,934 gpd, equivalent to 0.33 MGD. The City’s combined water demand versus water supplies during normal, single-, and multiple-dry years is summarized below in Table 4.19-3.

Table 4.19-3: Summary of Water Demand versus Water Supplies Category
Supply and Demand Comparison (mgd)[1][2]
2030 2035 2040 2045
Normal Year
Available Water Supply 5.37 5.35 5.35 5.36
Total Water Demand3 3.95 4.37 4.78 4.78
Surplus (Deficit) 1.42 0.98 0.57 0.58
Percent Shortfall -- -- -- --
2023-2031 Housing Element Update 262 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Table 4.19-3: Summary of Water Demand versus Water Supplies Category
Supply and Demand Comparison (mgd)[1][2]
2030 2035 2040 2045
Single-Dry Year
Available Water Supply 4.18 4.16 4.16 3.88
Total Water Demand3 3.95 4.37 4.78 4.78
Surplus (Deficit) 0.23 (0.21) (0.62) (0.90)
Percent Shortfall -- 5% 13% 19%
Multiple-Dry Year 1
Available Water Supply 4.18 4.16 4.16 3.88
Total Water Demand3 3.95 4.37 4.78 4.78
Surplus (Deficit) 0.23 (0.21) (0.62) (0.90)
Percent Shortfall -- 5% 13% 19%
Multiple-Dry Year 2
Available Water Supply 3.89 3.87 3.87 3.88
Total Water Demand3 3.95 4.37 4.78 4.78
Surplus (Deficit) (0.06) (0.50) (0.91) (0.90)
Percent Shortfall 2% 11% 19% 19%
Multiple-Dry Year 3
Available Water Supply 3.89 3.87 3.87 3.88
Total Water Demand3 3.95 4.37 4.78 4.78
Surplus (Deficit) (0.06) (0.50) (0.91) (0.90)
Percent Shortfall 2% 11% 19% 19%
Multiple-Dry Year 4
Available Water Supply 3.89 3.87 3.66 3.61
Total Water Demand3 3.95 4.37 4.78 4.78
Surplus (Deficit) (0.06) (0.50) (1.12) (1.17)
Percent Shortfall 2% 11% 23% 24%
Multiple-Dry Year 5
Available Water Supply 3.89 3.73 3.66 3.61
Total Water Demand3 3.95 4.37 4.78 4.78
Surplus (Deficit) (0.06) (0.64) (1.12) (1.17)
Percent Shortfall 2% 15% 23% 24%
2023-2031 Housing Element Update 263 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Table 4.19-3: Summary of Water Demand versus Water Supplies Category
Supply and Demand Comparison (mgd)[1][2]
2030 2035 2040 2045
Source: West Yost & Associates, Inc. City of San Bruno Housing Element Update Water Supply Assessment.

June 2022.

Notes:
1 Supply totals assume implementation of the Bay-Delta Plan Amendment. 2 Demand totals assume no reduction in water demand in dry years. 3 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study.

As shown in Table 4.19-3, there are sufficient supplies to meet the City’s cumulative water demand in normal years, but insufficient supplies to meet projected demands in single- and multiple-dry years, with percent shortfalls as high as 24 percent in 2045. The totals presented in Table 4.19-3 are extremely conservative, as they do not account for the water demand of the existing uses at the Housing Opportunity Sites and assume full implementation of the Bay Delta Plan Amendment, which as discussed in Section 4.19.1.1 is highly unlikely. Supply shortfalls would be nearly be eliminated without implementation of the Bay Delta Plan Amendment, with water supply shortfalls of less than one percent in the fourth and fifth multiple-dry year 2045 scenario (refer to Appendix E).

As discussed in Section 4.19.1.1, the City’s WSCP is capable of achieving water demand reductions of up to 50 percent. In the event of water supply deficits, the City will implement the WSCP, which is capable of achieving demand reductions that would ensure that water supplies exceed water demand in the event of a 24 percent shortfall or greater. Accordingly, sufficient water supplies are available to serve the project and reasonably foreseeable future development during normal, dry and multiple dry years.

Impact UTL-3: The project would not result in a determination by the wastewater treatment provider which serves or may serve the project that it does not have adequate capacity to serve the project’s projected demand in addition to the provider’s existing commitments. (Less than Significant Impact)
As discussed under Impact UTL-2, buildout of the Housing Element Update would increase water consumption by 0.33 MGD, which results in a corresponding increase in wastewater of 0.29 MGD.149 As documented in Section 4.19.1.2, the City of San Bruno currently generates an average of

2.146 MGD of wastewater during dry-weather (when WQCP treatment capacity is at its lowest).

Buildout of the Housing Element Update would increase the average amount of wastewater generated to 2.436 MGD, which would be below the City’s allocated dry-weather capacity of 3.5 MGD at the WQCP. Additionally, the WQCP collects and treats flows from the City of South San 149 Based upon the CalEEMod standard estimate of wastewater comprising 85 percent of indoor water use due to human consumption, landscape use, and evaporation loss. 2023-2031 Housing Element Update 264 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Francisco (average dry-weather flow of 4.912 MGD) and the City of Colma (average dry-weather flow of 0.195 MGD).150 Cumulatively, the combined dry-weather flows from the cities of San Bruno, South San Francisco, and Colma would amount under project conditions to 7.543 MGD, well within the WQCP’s dry-weather capacity of 13 MGD.151 Accordingly, the Housing Element Update would not result in a determination by the wastewater treatment provider which serves or may serve the project that it does not have adequate capacity to serve the project’s projected demand in addition to the provider’s existing commitments.

Impact UTL-4: The project would not generate solid waste in excess of state or local standards, or in excess of the capacity of local infrastructure, or otherwise impair the attainment of solid waste reduction goals. (Less than Significant Impact)
Demolition and construction activities generate solid waste materials requiring disposal, such as steel, concrete, asphalt, and lumber. CALGreen requires that at least 65 percent of all debris from demolition of any residential building be diverted from landfills via recycling, salvage, and other similar programs. Achievement of solid waste reduction goals would be further supported by MM GHG-1.1 (refer to Section 4.8 Greenhouse Gas Emissions), which would require the recycling or reuse of at least 50 percent of construction waste. Accordingly, demolition and construction associated with future development under the Housing Element Update would not generate waste in excess of local infrastructure capacity or impair the attainment of solid waste reduction goals.

Buildout of an additional 3,618 housing units is estimated to generate 3.9 pounds per resident daily, equivalent to 37,253 pounds per day or an additional 6,799 tons of solid waste annually.152 Housing units associated with pipeline projects have already undergone plan- and project-level analysis of their contribution to the capacity of local infrastructure and solid waste reduction goals, which were found to be less than significant (refer to Section 3.2.1). Based on the City’s 2021 total solid waste generation of 30,621 tons, which is conservative since per capita solid waste generation continues to trend downward (refer to Section 4.19.1.2), buildout of the Housing Opportunity Sites and ADUs would increase the City’s total solid waste generation to 37,420 tons annually.

As discussed in Section 4.19.1.2, the San Bruno Transfer Station has a maximum permitted capacity of 768 tons of solid waste per day. Based on the projected total solid waste generation of 37,420 tons annually, the San Bruno Transfer Station would need to process 103 tons of waste daily, well within its maximum permitted capacity.
150 Schumacker, Brian. Plant Superintendent. South San Francisco/San Bruno Water Quality Control Plant (WQCP).

Personal communication. December 20, 2021.
151 After completion of the analysis presented in this Initial Study, the number of units assumed at Sites 8 and 21 increased by one unit each, the number of units assumed at Site 22 decreased by one unit, and the number of pipeline units decreased by one unit, resulting in a net increase of one unit and two residents assumed at the Housing Opportunity Sites (2,708 units versus 2,709 units, 7,150 residents versus 7,152 residents) and no increase in the total number of units and residents assumed for the Housing Element Update as a whole (3,618 units and 9,552 residents total). This change would not affect any of the conclusions presented herein this Initial Study. 152 Source: CalRecycle. “Disposal Rate Calculator (San Bruno, 2019)”. Accessed October 19, 2022. https://www2.calrecycle.ca.gov/LGCentral/AnnualReporting/DisposalRateCalculator. 3,618 housing units multiplied by 2.64 (average number of residents per unit in San Bruno) equals 9,552 new residents. Multiplied by

3.9 (pounds per resident per day) equals 37,253 pounds per day. Multiplied by 365 days in a year equals 13,597,345 pounds annually, equivalent to 6,799 tons annually.
2023-2031 Housing Element Update 265 Initial Study
City of San Bruno December 2022 (Revised January 2023)
The majority of solid waste is distributed to the Corinda Los Trancos Landfill, which has a remaining capacity of 22,180,000 cubic yards and is permitted for continued service through 2034, beyond the buildout date of the San Bruno Housing Element. This capacity is sufficient to support proposed project solid waste disposal needs through 2034. Using CalRecycle’s conversion rate of one cubic yard for every 800 pounds, 37,420 tons generated annually between 2031 and 2034 is equivalent to 282,120 cubic yards, or approximately one percent of the remaining capacity of Corinda Los Trancos Landfill.153 The Housing Element Update’s contribution to Corinda Los Trancos Landfill would be less than 1/100th of a percent.154 Further, as shown in Table 4.19-1, the combined remaining capacity at the Class III Municipal Waste Landfill Facilities that serve the City of San Bruno beyond 2034 is approximately 164,343,000 cubic yards. The City’s annual contribution would be less than 1/1,000th of a percent.155 Therefore, sufficient landfill capacity exists to serve the Housing Element Update and the City at Corinda Los Trancos landfill through 2034, and at Guadalupe Sanitary Landfill, Monterey Peninsula Landfill, Newby Island Sanitary Landfill, Potrero Hills Landfill, Recology Hay Road, and/or Recology Ostrom Road LF, Inc. beyond 2034.

Because Corinda Los Trancos Landfill serves numerous Bay Area jurisdictions, growth within these jurisdictions could also contribute to cumulative solid waste disposal demands on the facility.

However, many of these jurisdictions are also served by the facilities listed above which would offer continued operation beyond 2034. Therefore, cumulative growth in other jurisdictions is not expected to contribute to local solid waste infrastructure capacity exceedances. Additionally, while it is expected that local and regional landfills would have sufficient capacity to support the Housing Element Update in conjunction with Citywide and regional development, AB 1826 requires multifamily residential developments that generate more than four cubic yards of solid waste per week to incorporate organic recycling programs, such as composting. It is therefore anticipated that some of that solid waste generated by future development under the Housing Element Update would be redirected in compliance with AB 1826, further minimizing anticipated solid waste generation levels.

Thus, the Housing Element Update’s cumulative impacts pertaining to solid waste standard or facility exceedances, as well as compliance with federal, state, and local solid waste management and reduction statues and regulations, would be less than cumulatively considerable, and impacts would therefore be less than significant.

Impact UTL-5: The project would not be noncompliant with federal, state, or local management and reduction statutes and regulations related to solid waste. (Less than Significant Impact)
As discussed under Impact UTL-4, 65 percent of demolition debris and 50 percent of construction waste would be recycled or reused in compliance with CalGreen. Once operational, future development under the Housing Element Update would be required to comply with the provisions of 153 37,420 tons is equivalent to 74,840,000 pounds, multiplied by three (years from Housing Element buildout until Corinda Los Trancos Landfill closure date) divided by 800 (CalRecycle conversion rate) equals 280,650 cubic yards. 280,650 divided by 22,180,000 equals 0.012. 154 6,799 tons is equivalent to 13,597,345 pounds, multiplied by three (years from Housing Element buildout until Corinda Los Trancos Landfill closure date) divided by 800 equals 50,991 cubic yards. 50,991 divided by 22,180,000 (Corinda Los Trancos Landfill remaining capacity) equals 0.0022. 155 93,550 cubic yards (City’s combined annual contribution) divided by 164,343,000 equals 0.0005. 2023-2031 Housing Element Update 266 Initial Study
City of San Bruno December 2022 (Revised January 2023)
AB 341 and AB 1826. Compliance with federal, state, and local statutes and regulations related to solid waste would be further supported by the use of reusable, recyclable, and biodegradable materials as promoted by General Plan Policy HS-70. Accordingly, the Housing Element Update would be compliant with federal, state, and local management and reduction statutes and regulations related to solid waste.
2023-2031 Housing Element Update 267 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.20 WILDFIRE

4.20.1 Environmental Setting

4.20.1.1 Regulatory Framework
State
Fire Hazard Severity Zones
CAL FIRE is required by law to map areas of significant fire hazards based on fuels, terrain, weather, and other relevant factors. Referred to as Fire Hazard Severity Zones (FHSZs), these maps influence how people construct buildings and protect property to reduce risk associated with wildland fires.

FHSZs are divided into areas where the state has financial responsibility for wildland fire protection, known as state responsibility areas (SRAs), and areas where local governments have financial responsibility for wildland fire protection, known as local responsibility areas (LRAs). Homeowners living in an SRA are responsible for ensuring that their property is in compliance with California’s building and fire codes. Only lands zoned for very high fire hazard are identified within LRAs.

California Fire Code Chapter 49
Chapter 49 of the California Fire Code sets requirements for wildland-urban interface fire areas that increase the ability of buildings to resist the intrusion of flame or burning embers being projected by a vegetation fire, in addition to systematically reducing conflagration losses through the use of performance and prescriptive requirements.

California Public Resources Code Section 4442 through 4431 The California Public Resources Code includes fire safety regulations that restrict the use of equipment that may produce a spark, flame, or fire; require the use of spark arrestors on construction equipment that uses an internal combustion engine; specify requirements for the safe use of gasolinepowered tools on forest-covered land, brush-covered land, or grass-covered land; and specify fire suppression equipment that must be provided onsite for various types of work in fire-prone areas.

These regulations include the following:
• Earthmoving and portable equipment with internal combustion engines would be equipped with a spark arrestor to reduce the potential for igniting a wildland fire (Public Resources Code Section 4442);
• Appropriate fire suppression equipment would be maintained during the highest fire danger period, from April 1 to December 1 (Public Resources Code Section4428); • On days when a burning permit is required, flammable materials would be removed to a distance of 10 feet from any equipment that could produce a spark, fire, or flame, and the construction contractor would maintain appropriate fire suppression equipment (Public Resources Code Section 4427); and
• On days when a burning permit is required, portable tools powered by gasoline-fueled internal combustion engines would not be used within 25 feet of any flammable materials (Public Resources Code Section 4431).
2023-2031 Housing Element Update 268 Initial Study
City of San Bruno December 2022 (Revised January 2023)
California Code of Regulations Title 14
The California Board of Forestry and Fire Protection has adopted regulations, known as SRA Fire Safe Regulations, which apply basic wildland fire protection standards for building, construction, and development occurring in a SRA. The future design and construction of structures, subdivisions and developments in SRAs are required to provide for the basic emergency access and perimeter wildfire protection measures discussed in Title 14.

Fire Management Plans
CAL FIRE has developed an individual Unit Fire Management Plan for each of its 21 units and six contract counties. CAL FIRE has developed a strategic fire management plan for the San MateoSanta Cruz Unit, which covers the project area and addresses citizen and firefighter safety, watersheds and water, timber, wildlife and habitat (including rare and endangered species), unique areas (scenic, cultural, and historic), recreation, range, structures, and air quality. The plan includes stakeholder contributions and priorities and identifies strategic areas for pre-fire planning and fuel treatment as defined by the people who live and work with the local fire issues.

Local
City of San Bruno General Plan
Various policies in the City’s General Plan have been adopted for the purpose of avoiding or mitigating wildfire impacts resulting from planned development within the City including the following:

Policies Description
HS-1 Regulate development, including remodeling or structural rehabilitation, to assure adequate mitigation of safety hazards on sites having a history or threat of slope instability, erosion, subsidence, seismic dangers (including those resulting from liquefactions, ground failure, ground rupture), flooding, and/or fire hazards.

HS-2 Review and revise the City’s Building Code, Zoning Ordinance, and Subdivision requirements to safeguard against seismic, geologic, and safety hazards. Mitigation should include:
• Minimal grading and removal of natural vegetation to prevent erosion and slope instability. Cleared slopes should be replanted with vegetation. • Proper drainage control to prevent erosion of the site and affected properties. • Careful siting and structural engineering in unstable areas. • Consideration of flooding and fire hazards in siting and designing new development.

HS-43 Allow reasonable latitude for noise generated by uses that are essential to community health, safety, and welfare, such as emergency vehicle operations and sirens.

PFS-F Provide adequate public safety services for all San Bruno properties – including police protection, fire suppression, emergency medical care, and emergency management.

PFS-26 Ensure adequate staffing and facilities for the City’s Police and Fire departments to achieve desired levels of service, particularly surrounding transit areas and along urbaninterface hazard areas. 2023-2031 Housing Element Update 269 Initial Study
City of San Bruno December 2022 (Revised January 2023)
Policies Description
PFS-30 Require installation and maintenance of fire protection measures in high-risk and urbaninterface areas:
• Proper siting and access;
• Brush clearance (non-fire resistant landscaping 50 feet from structures); • Use of fire resistive materials (pressure-impregnated, fire resistive shingles or shakes);
• Landscaping with fire resistive species; and
• Installation of early warning systems (alarms and sprinklers).

PFS-31 Ensure adequate fire water pressure as a condition of approval for all new development projects.

PFS-32 Require installation of residential sprinklers in areas with steep slopes and/or diminished access.

PFS-34 Identify and remove mature and/or diseased Eucalyptus trees in rights-of-way and other open areas, if they pose a fire hazard or other threat to health and safety.

PFS-35 Require installation of automatic sprinkler systems in all hotel, motel, and other overnight lodging facilities, in mixed commercial/residential uses, and in apartment buildings of three or more units.

PFS-39 Minimize risks to single-access residential neighborhoods by providing alternative access for fire and other emergency personnel.

4.20.1.2 Existing Conditions
No portion of San Bruno is within a SRA; the City is located in a LRA in the CAL FIRE San Mateo – Santa Cruz Administrative Unit and contains no very high fire hazard severity zones.156 The greatest potential for fire hazards in the City of San Bruno occurs in designated Wildland Fire Hazard Areas near extensive natural vegetation, specifically Crestmoor Canyon, Junipero Serra County Park, and San Francisco Water Department’s Peninsula Watershed. Dense stands of eucalyptus trees within the Rollingwood and Crestmoor neighborhoods also pose fire hazard potential. Urban-interface hazard areas are developed areas near Wildland Fire Hazard Areas potentially at risk of damage should a wildland fire occur. In these areas, highly flammable vegetation mixed with steep topography and long, dry summers create potential for wildland fires.

Housing Opportunity Sites
Housing Opportunity Site 6 (2101 Sneath Lane) is located within the Wildland Fire Hazard Area and Wildland/Urban Interface Hazard Area, as shown on Figure 4.20-1. Small portions of Housing Opportunity Sites 3 and 14 are identified as Wildland/Urban Interface Hazard Areas (refer to Figure

4.20-1).
156 California Department of Forestry and Fire Protection. Fire Hazard Severity Zone Viewer. Accessed October 24, 2022. https://egis.fire.ca.gov/FHSZ/
19 21
20 7
12 6
9 4
2 8
5 23
22 17
10 18
13 14
3 1
15 11
16 FEET
10 0 500 1000 2000
acres
Source: City of San Bruno Redevelopment Project Area Plan Draft EIR, March, 1999.

Wildland Fire Hazard Area
Wildland/Urban Interface
Hazard Area
City Limits
Bayhill Specific Plan Boundary
Transit Oriented Development Overlay
WILDLAND FIRE HAZARD AREAS FIGURE 4.20-1
City
2023-2031 Housing Element Update
of San Bruno
270 Initial Study
December 2022 (Revised January 2023)
2023-2031 Housing Element Update 271 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.20.2 Impact Discussion
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
If located in or near state responsibility areas or
lands classified as very high fire hazard severity
zones, would the project:
1) Substantially impair an adopted emergency
response plan or emergency evacuation plan?
2) Due to slope, prevailing winds, and other
factors, exacerbate wildfire risks, and thereby
expose project occupants to pollutant
concentrations from a wildfire or the
uncontrolled spread of a wildfire?
3) Require the installation or maintenance of
associated infrastructure (such as roads, fuel
breaks, emergency water sources, power lines,
or other utilities) that may exacerbate fire risk
or that may result in temporary or ongoing
impacts to the environment?
4) Expose people or structures to significant
risks, including downslope or downstream
flooding or landslides, as a result of runoff,
post-fire slope instability, or drainage
changes?

4.20.2.1 Wildfire Analysis
None of the Housing Development Sites are located in or near state responsibility areas or lands classified as very high fire hazard severity zones. As shown on Figure 4.20-1, Site 6 is located within a Wildland Fire Hazard Area, and small portions of Housing Opportunity Sites 3 and 14 are identified as Wildland/Urban Interface Hazard Areas. Adherence with General Plan Policy PFS-30 would require future development at Sites 3, 6, and 14 to install and maintain a variety of fire protection measures, and all construction would be required by the City’s Municipal Code to be built to 2019 California and International Fire Code standards with fire suppression systems. Further, as discussed in Section 4.15 under Impact PS-1, fire protection services are adequate to meet new demand generated by redevelopment of Sites 3, 6, and 14. For these reasons, future development under the Housing Element Update would not result in any wildfire-related impacts. (Less than Significant Impact)
2023-2031 Housing Element Update 272 Initial Study
City of San Bruno December 2022 (Revised January 2023)

4.21 MANDATORY FINDINGS OF SIGNIFICANCE
Potentially
Significant
Impact
Less than
Significant
with Mitigation
Incorporated
Less than
Significant
Impact
No Impact
1) Does the project have the potential to
substantially degrade the quality of the
environment, substantially reduce the habitat
of a fish or wildlife species, cause a fish or
wildlife population to drop below selfsustaining levels, threaten to eliminate a plant or animal community, substantially reduce the
number or restrict the range of a rare or
endangered plant or animal, or eliminate
important examples of the major periods of
California history or prehistory?
2) Does the project have impacts that are
individually limited, but cumulatively
considerable? (“Cumulatively considerable”
means that the incremental effects of a project
are considerable when viewed in connection
with the effects of past projects, the effects of
other current projects, and the effects of
probable future projects.)
3) Does the project have environmental effects
which will cause substantial adverse effects on
human beings, either directly or indirectly?
Impact MFS-1: The project does not have the potential to substantially degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, substantially reduce the number or restrict the range of a rare or endangered plant or animal, or eliminate important examples of the major periods of California history or prehistory. (Less than Significant Impact with Mitigation Incorporated) As discussed in the individual resource sections of this Initial Study, future development under the Housing Element Update would not degrade the quality of the environment with the implementation of the identified General Plan, TCP, and Bayhill Specific policies and mitigation measures. As discussed in Section 4.4 Biological Resources, implementation of MM BIO-1.1, consistent with federal and state laws, would ensure that future development does not result in the loss of fertile or nesting eggs or nest abandonment. Further, the Housing Element Update with adherence to federal, state, regional and local regulations would not reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, or reduce the number or restrict the range of a rare or endangered plant or animal.

Implementation of MM CUL-1.1, MM CUL-2.1, and MM CUL-2.2 (refer to Section 4.5 Cultural Resources) and MM NOI-2.1 (refer to Section 4.13 Noise and Vibration) would ensure that future 2023-2031 Housing Element Update 273 Initial Study
City of San Bruno December 2022 (Revised January 2023)
development does not cause a substantial adverse change in the significance of any archaeological, historic, or tribal cultural resources. Adherence with MM GHG-1.1 and MM GHG-1.2 (refer to Section 4.8 Greenhouse Gas Emissions) by future residential development would ensure that the project does not generate significant GHG emissions and would support the state’s long-term goal of carbon neutrality. Adherence with MM HAZ-2.1 and MM HAZ-2.2 (refer to Section 4.9 Hazards and Hazardous Materials) would ensure that any subsurface contamination present at the Housing Opportunity Sites does not create a significant hazard to the public or the environment.

With adherence to federal, state, and local regulations and implementation of the mitigation measures identified above, the Housing Element Update would not degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, substantially reduce the number or restrict the range of a rare or endangered plant or animal, or eliminate important examples of the major periods of California history or prehistory.

Impact MFS-2: The project does not have impacts that are individually limited, but cumulatively considerable. (Less than Significant Impact with Mitigation Incorporated)
Under Section 15065(a)(3) of the CEQA Guidelines, a lead agency shall find that a project may have a significant effect on the environment where there is substantial evidence that the project has potential environmental effects “that are individually limited, but cumulatively considerable.” As defined in Section 15065(a)(3) of the CEQA Guidelines, cumulatively considerable means “that the incremental effects of an individual project are significant when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects.”
The analysis provided throughout this Initial Study presents the combined effects of the implementation of the 2023-2031 Housing Element, taking into account the planned future development of 3,618 housing units over the next eight years, with the large majority of the units expected to be built on the 23 identified Housing Opportunity Sites. As such, this Initial Study presents the cumulative impacts of the Housing Element, based on the planned location of that future housing. However, the City will experience additional growth and change over that timeframe, in terms of non-residential development and public facilities that will occur consistent with the General Plan and other long-range planning documents. The discussion that follows presents how the Housing Element would contribute to foreseeable cumulative impacts.

Because criteria air pollutant and GHG emissions would contribute to regional and global emissions of such pollutants, the identified thresholds developed by CARB and BAAQMD and used by the City of San Bruno were developed such that an impact would also be a cumulatively considerable impact. Buildout of the Housing Element Update would not result in a significant emissions of criteria air pollutants or GHG emissions and, therefore, would not make a substantial contribution to cumulative air quality or GHG emissions impacts. The discussion of criteria air pollutant impacts presented in Section 4.3 Air Quality also reflects cumulative conditions, and the project would not contribute to significant cumulative criteria pollutant impacts. The Housing Element’s contribution to cumulative climate change impacts was presented in Section 4.8 Greenhouse Gas Emissions as less 2023-2031 Housing Element Update 274 Initial Study
City of San Bruno December 2022 (Revised January 2023)
than cumulatively considerable. Similarly, for the reasons presented in Section 4.6, the discussion of the project’s incremental demand on energy resources also reflects cumulative conditions, since the Housing Element’s future population’s consumption of electricity, natural gas, and gasoline was assessed in comparison with consumption at the state and county level. Therefore, the Housing Element Update would not make a substantial contribution to cumulative air quality, energy use, or GHG emissions impacts.

The project would not impact agricultural or forestry resources or mineral resources, therefore there is no potential for cumulative impacts to these resources. Nor are there any cumulative impacts associated with wildfire risk, as none of the Housing Development Sites are located in or near state responsibility areas or lands classified as very high fire hazard severity zones. However, Site 6 is located within a Wildland Fire Hazard Area, and small portions of Housing Opportunity Sites 3 and 14 are identified as Wildland/Urban Interface Hazard Areas. Sites 3, 6, and 14 and any cumulative development within a Wildland Fire Hazard or Wildland/Urban Interface Areas would be required by General Plan Policy PFS-30 to install and maintain a variety of fire protection measures, and all construction would be required by the City’s Municipal Code to be built to 2019 California and International Fire Code standards with fire suppression systems. Therefore, cumulative wildfirerelated impacts would be less than cumulatively considerable.

As discussed throughout this Initial Study, future development under the Housing Element Update would result in less than significant impacts to aesthetics, geology and soils, hydrology and water quality, land use and planning, population and housing, public services, recreation, and utilities and service systems with adherence to federal, state, regional and local regulations and policies. The discussions presented in Section 4.11 Land Use and Planning, Section 4.14 Population and Housing, Section 4.15 Public Services, Section 4.16 Recreation, and Section 4.19 Utilities and Service Systems take account of planned growth in San Bruno according to the current General Plan and relevant Specific Plans, and represent a cumulative analysis of future development under the Housing Element Update due to the nature of these individual resource areas, and therefore the project would not result in a cumulatively considerable impact as regards these resources.

Cumulative impacts related to aesthetics, geology and soils, and hydrology and water quality are more localized in nature. As discussed in Section 1.1, specific development proposals at the Housing Opportunity Sites would be subject to project-level review at the time of application for any discretionary actions that would allow for an analysis of the cumulative impacts of said proposals based on their design and in conjunction with projects in the cumulative area of effect, which are not reasonably foreseeable at this time. Cumulative impacts to hydrology and water quality are related to the watershed within which the various Housing Opportunity Sites would occur, and the policies and programs presented in Section 4.10, such as the Municipal Regional Permit addressing stormwater, are intended to address the potential for individual projects to contribute to cumulative impacts.

Further, all cumulative development in the City of San Bruno would be subject to the same regulations and policies that would be imposed on future development under the Housing Element Update. For these reasons, the Housing Element Update would not result in cumulatively considerable impacts on aesthetics, geology and soils, hydrology and water quality.

As discussed in Section 4.13 Noise and Vibration, buildout of the Housing Element Update would not increase traffic noise levels on any one roadway by more than 0.7 dBA. Therefore, although under existing plus background plus project conditions the traffic noise level on San Bruno Avenue 2023-2031 Housing Element Update 275 Initial Study
City of San Bruno December 2022 (Revised January 2023)
would increase by as much as three dBA by 2031, the traffic noise increase associated with buildout of the Housing Element Update would not be cumulatively considerable.

As discussed in Section 4.17 Transportation, buildout of the Housing Element Update would reduce VMT citywide and would not conflict with any programs, plans, ordinances, or policies addressing the regional or local circulation system. Further, all future development under the Housing Element Update would be required by MM TRN-1-1 to prepare a Transportation Analysis that would analyze the design of specific development proposals at the Housing Opportunity Sites (which are not reasonably foreseeable at this time) to ensure that the design does not increase hazards or result in inadequate emergency access in conjunction with surrounding development. Accordingly, the Housing Element Update would not contribute to any cumulative transportation impacts.

During construction of future development under the Housing Element Update, highly localized and temporary air quality, biological, cultural, hazards and hazardous materials, and noise and vibration impacts would occur on and around each Opportunity Site. Compliance with federal, state, regional and local regulations and implementation of the conditions of approval and mitigation measures identified in this Initial Study and in the EIRs prepared for the City’s General Plan, TCP, and Bayhill Specific Plan would reduce cumulative impacts associated with each project’s construction and future cumulative development to a less than significant level.

Impact MFS-3: The project does not have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly. (Less than Significant Impact with Mitigation Incorporated)
Consistent with Section 15065(a)(4) of the CEQA Guidelines, a lead agency shall find that a project may have a significant effect on the environment where there is substantial evidence that the project has the potential to cause substantial adverse effects on human beings, either directly or indirectly.

Under this standard, a change to the physical environment that might otherwise be minor must be treated as significant if people would be significantly affected. This factor relates to adverse changes to the environment of human beings generally, and not to effects on particular individuals. While changes to the environment that could indirectly affect human beings would be represented by all of the designated CEQA issue areas, those that could directly affect human beings include air quality, hazardous materials, and noise. As documented in Section 4.3 Air Quality, Section 4.9 Hazards and Hazardous Materials, and Section 4.13 Noise and Vibration of this Initial Study, implementation of the federal, state, regional and local policies and mitigation measures that have been identified would reduce these impacts to a less than significant level. No other direct or indirect adverse effects on human beings have been identified.
2023-2031 Housing Element Update 276 Initial Study
City of San Bruno December 2022 (Revised January 2023)
SECTION 5.0 REFERENCES
The analysis in this Initial Study is based on the professional judgement and expertise of the environmental specialists preparing this document, based upon review of the site, surrounding conditions, site plans, and the following references:

AECOM. Corrective Plan Implementation Report. April 2020.

Association of Bay Area Governments and Metropolitan Transportation Commission. Plan Bay Area 2050. October 21, 2021.

Association of Bay Area Governments. Projections 2040, A Companion to Plan Bay Area 2040.

November 2018.

BAAQMD. Final 2017 Clean Air Plan. April 20, 2017.

Bay Area Air Quality Management District (BAAQMD). Recommended Methods for Screening and Modeling Local Risks and Hazards, Version 3.0. May 2012.

Bay Area Air Quality Management District. Bay Area Emissions Inventory Summary Report:

Greenhouse Gases Base Year 2011. Accessed October 24, 2022. http://www.baaqmd.gov/~/media/files/planning-and-research/emissioninventory/by2011_ghgsummary.pdf Bay Area Air Quality Management District. California Environmental Quality Act Air Quality Guidelines. May 2017.

Bay Area Air Quality Management District. CEQA Thresholds for Evaluating the Significance of Climate Impacts from Land Use Projects and Plans. April 2022.

Bay Area Rapid Transit. “San Bruno Station”. Accessed October 13, 2022. https://www.bart.gov/stations/sbrn
Bay Area Rapid Transit. “System Facts”. Accessed October 13, 2022. https://www.bart.gov/about/history/facts
Bay Area Rapid Transit. 2022 Monthly Ridership Reports. September 2022.

California Air Resources Board. “Overview: Diesel Exhaust and Health.” Accessed October 24, 2022. https://ww2.arb.ca.gov/resources/overview-diesel-exhaust-and-health.

California Air Resources Board. “The Advanced Clean Cars Program.” Accessed October 24, 2022. https://ww2.arb.ca.gov/our-work/programs/advanced-clean-cars-program California Air Resources Board. 2019 Edition, California Greenhouse Gas Emission Inventory: 2000 – 2017. Accessed October 24, 2022.
https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2017/ghg_inventory_trends_00-17.pdf California Air Resources Board. Draft 2022 Scoping Plan Update, Appendix D. May 10, 2022. 2023-2031 Housing Element Update 277 Initial Study
City of San Bruno December 2022 (Revised January 2023)
California Department of Conservation. “Farmland Mapping and Monitoring Program.” Accessed October 24, 2022. http://www.conservation.ca.gov/dlrp/fmmp/Pages/Index.aspx.

California Department of Conservation. “Williamson Act.” Accessed October 24, 2022. http://www.conservation.ca.gov/dlrp/lca.

California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, Capuchino High Report 41-69047-4130738”. Accessed November 14, 2022. https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=41690474130738&agglevel=scho ol&year=2021-22
California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, Millbrae Elementary Report 41-68973”. Accessed November 14, 2022. https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=4168973&agglevel=district&year =2021-22
California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, Mills High Report 41-69047-4134557”. Accessed November 14, 2022. https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=41690474134557&agglevel=scho ol&year=2021-22
California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, San Bruno Park Elementary Report 41-69013”. Accessed November 14, 2022. https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=4169013&agglevel=district&year =2021-22
California Department of Education Data Quest. “Enrollment Multi-Year Summary by Grade, San Mateo Union High Report 41-69047”. Accessed November 14, 2022. https://dq.cde.ca.gov/dataquest/dqcensus/EnrGrdYears.aspx?cds=4169047&agglevel=district&year =2021-22
California Department of Finance. “E-1 Population Estimates for Cities, Counties, and the State – January 1, 2021 and 2022.” Accessed August 4, 2022.
https://dof.ca.gov/forecasting/demographics/estimates/e-5-population-and-housing-estimates-forcities-counties-and-the-state-2020-2022/ California Department of Forestry and Fire Protection. “Fire and Resource Assessment Program.” Accessed October 24, 2022. http://frap.fire.ca.gov/.

California Department of Forestry and Fire Protection. Fire Hazard Severity Zone Viewer. Accessed October 24, 2022. https://egis.fire.ca.gov/FHSZ/
California Department of Housing and Community Development. “Regional Housing Needs Allocation and Housing Elements” Accessed October 24, 2022. https://www.hcd.ca.gov/planningand-community-development/housing-elements California Department of Tax and Fee Administration. “Net Taxable Gasoline Gallons.” Accessed July 20, 2022. https://www.cdtfa.ca.gov/dataportal/dataset.htm?url=VehicleTaxableFuelDist. 2023-2031 Housing Element Update 278 Initial Study
City of San Bruno December 2022 (Revised January 2023)
California Energy Commission. “Natural Gas Consumption by County.” Accessed July 20, 2022. http://ecdms.energy.ca.gov/gasbycounty.aspx.

California Energy Commission. Energy Consumption Data Management System. “Electricity Consumption by County.” Accessed October 24, 2022.
http://ecdms.energy.ca.gov/elecbycounty.aspx.

California Environmental Protection Agency. “Cortese List Data Resources.” Accessed November 15, 2022. https://calepa.ca.gov/sitecleanup/corteselist/.

California Environmental Protection Agency. “Cortese List Data Resources.” Accessed October 24, 2022. https://calepa.ca.gov/sitecleanup/corteselist/.

California Gas and Electric Utilities. 2020 California Gas Report. Accessed July 20, 2022.

California Geological Survey. California Earthquake Hazards Zone Application (EQ ZAPP).

Accessed August 12, 2022. https://maps.conservation.ca.gov/cgs/EQZApp/app/ California Geological Survey. Tsunami Hazard Area Map. Accessed July 28, 2022. https://maps.conservation.ca.gov/cgs/informationwarehouse/ts_evacuation/?extent=- 13734968.0269%2C4446045.3469%2C13500153.4761%2C4550305.4535%2C102100&utm_source=cgs+active&utm_content=sanmateo California Regional Water Quality Control Board San Francisco Region. Municipal Regional Stormwater NPDES Permit, Order No. R2-2022-0018, NPDES Permit No. CAS612008. May 11, 2022
California Regional Water Quality Control Board. San Francisco Bay Region Municipal Regional Stormwater NPDES Permit. November 2015.

CalRecycle. “Disposal Rate Calculator (San Bruno, 2021)”. Accessed October 19, 2022. https://www2.calrecycle.ca.gov/LGCentral/AnnualReporting/DisposalRateCalculator.

Caltrain. Caltrain 2019 Annual Passenger Count Key Findings. 2019.

CEQA Guidelines Section 15064.5(a)(3) and California Office of Historic Preservation Technical Assistance Series #6. Accessed October 24, 2022.
http://www.ohp.parks.ca.gov/pages/1069/files/technical%20assistance%20bulletin%206%202011 %20update.pdf.

City of San Bruno. 2020 Urban Water Management Plan. November 2021.

City of San Bruno. Bayhill Specific Plan including Phase I Development. Final EIR. October 2021.

City of San Bruno. FY2022-23 Master Fee Schedule. July 2022.

City of San Bruno. San Bruno 2025: General Plan Draft Environmental Impact Report. Page 3-158.

December 2008.
2023-2031 Housing Element Update 279 Initial Study
City of San Bruno December 2022 (Revised January 2023)
City of San Bruno. San Bruno General Plan. March 24, 2009. Page 7-6.

City of San Bruno. San Bruno Transit Corridors Plan Draft Environmental Impact Report. Page 15-

4. March 2012.

City of San Bruno. San Bruno Transit Corridors Plan Environmental Impact Report. June 2012.

City of San Bruno. Walk ‘N Bike Plan. July 2016.

City of San Bruno. Water System Master Plan. December 2021.

City/County Association of Governments of San Mateo County. “San Mateo County Congestion Management Program 2019”. Accessed October 24, 2022.
https://ccag.ca.gov/programs/transportation-programs/congestion-management/.

ECONorthwest. Scenario Analysis Results. July 2022.

Federal Emergency Management Agency. "FEMA Flood Map Service Center Search All Products - San Mateo County All Jurisdictions." Accessed September 7, 2022. https://msc.fema.gov/portal/advanceSearch.

Gwinn, Brian. Hazardous Materials Specialist, Groundwater Protection Program, San Mateo County Environmental Health Services Department. Email communication dated September 8, 2022.

Historic Aerials by NetrOnline. “Historic Aerials Viewer”. Accessed September 12, 2022. https://www.historicaerials.com/viewer.

Macrostrat. “Geologic Map”. Accessed October 22, 2022. https://macrostrat.org/map/layers#x=- 122.4&y=37.608&z=11.72&show=fossils
Metropolitan Transportation Commission. “Priority Development Areas (Plan Bay Area 2050)”.

Accessed October 6, 2022. https://opendata.mtc.ca.gov/datasets/priority-development-areas-planbay-area-2050 Metropolitan Transportation Commission. “Transit Priority Areas (2021)”. Accessed October 21, 2022.
https://www.arcgis.com/apps/mapviewer/index.html?panel=gallery&suggestField=true&layers=37 0de9dc4d65402d992a769bf6ac8ef5
Metropolitan Transportation Commission. Plan Bay Area 2050 Growth Geographies. Accessed October 11, 2022.
https://mtc.maps.arcgis.com/apps/webappviewer/index.html?id=af347b881594468a94ea85a67e972 679
Peninsula Clean Energy. “Frequently Asked Questions.” Accessed October 24, 2022. https://www.peninsulacleanenergy.com/faq/.

San Bruno Fire Department/AB Triton Consulting. Community Risk Assessment: Standards of Cover & Deployment Analysis. October 2022.
2023-2031 Housing Element Update 280 Initial Study
City of San Bruno December 2022 (Revised January 2023)
San Bruno Park School District. “New Attendance Boundary Info”. Accessed November 14, 2022. https://www.sbpsd.org/page/new-attendance-boundary-info San Francisco Regional Water Quality Control Board. “The 303(d) List of Impaired Water Bodies.” Accessed August 11, 2022.
https://www.waterboards.ca.gov/sanfranciscobay/water_issues/programs/TMDLs/303dlist.html.

San Mateo County. General Plan. November 1986.

Schumacker, Brian. Plant Superintendent. South San Francisco/San Bruno Water Quality Control Plant (WQCP). Personal communication. December 20, 2021.

CalRecycle. “Disposal Rate Calculator (San Bruno, 2019)”. Accessed October 19, 2022. https://www2.calrecycle.ca.gov/LGCentral/AnnualReporting/DisposalRateCalculator.

United States Census Bureau. Quick Facts, San Bruno city, California. Accessed October 24, 2022. https://www.census.gov/quickfacts/fact/table/sanbrunocitycalifornia/PST040219#qf-flag-X United States Department of Transportation. “USDOT Announces New Vehicle Fuel Economy Standards for Model Year 2024-2026.” Accessed July 20, 2022. https://www.nhtsa.gov/pressreleases/usdot-announces-new-vehicle-fuel-economy-standards-model-year-2024-2026 United States Energy Information Administration. “California Energy Consumption by End-UseSector, 2020.” Accessed October 24, 2022. https://www.eia.gov/state/?sid=CA#tabs-2.

United States Energy Information Administration. “California Energy Consumption Estimate, 2020.” Accessed July 20, 2022. https://www.eia.gov/state/?sid=CA#tabs-2.

United States Environmental Protection Agency. “EPA Actions to Protect the Public from Exposure to Asbestos.” Accessed October 24, 2022. https://www.epa.gov/asbestos/epa-actions-protectpublic-exposure-asbestos United States Environmental Protection Agency. “Summary of the Energy Independence and Security Act.” Accessed July 20, 2022. https://www.epa.gov/laws-regulations/summary-energyindependence-and-security-act United States Environmental Protection Agency. “Summary of the Resource Conservation and Recovery Act.” Accessed October 22, 2022. https://www.epa.gov/laws-regulations/summaryresource-conservation-and-recovery-act.

United States Environmental Protection Agency. “Superfund: CERCLA Overview.” Accessed October 24, 2022. https://www.epa.gov/superfund/superfund-cercla-overview.

United States Environmental Protection Agency. Inventory of U.S. Greenhouse Gas Emissions and Sinks 1990-2018. Accessed October 24, 2022. https://www.epa.gov/sites/production/files/2020- 04/documents/us-ghg-inventory-2020-main-text.pdf
United States Environmental Protection Agency. The 2021 EPA Automotive Trends Report:

Greenhouse Gas Emissions, Fuel Economy, and Technology since 1975. November 2021. 2023-2031 Housing Element Update 281 Initial Study
City of San Bruno December 2022 (Revised January 2023)
California Gas and Electric Utilities. 2020 California Gas Report. Accessed July 20, 2022. https://www.socalgas.com/sites/default/files/2020-
10/2020_California_Gas_Report_Joint_Utility_Biennial_Comprehensive_Filing.pdf.

United States Environmental Protection Agency. Light Nonaqueous Phase Liquids. June 2015. 2023-2031 Housing Element Update 282 Initial Study
City of San Bruno December 2022 (Revised January 2023)
SECTION 6.0 LEAD AGENCY AND CONSULTANTS

6.1 LEAD AGENCY
Michael Laughlin, Planning & Housing Manager
Michael Smith, Senior Planner

6.2 CONSULTANTS
David J. Powers & Associates, Inc.

Environmental Consultants and Planners
Akoni Danielsen, President/Principal Project Manager
Natalie Noyes, Senior Project Manager
Matthew Moore, Project Manager
Ryan Osako, Graphic Artist
Archaeological/Historical Consultants
Cultural and Tribal Cultural Resources Consultants
Hexagon Transportation Consultants, Inc.

Transportation Consultants
Illingworth & Rodkin, Inc.

Acoustical & Air Quality Consultants
2023-2031 Housing Element Update 283 Initial Study
City of San Bruno December 2022 (Revised January 2023)
SECTION 7.0 ACRONYMS AND ABBREVIATIONS
2017 CAP Bay Area 2017 Clean Air Plan
AB Assembly Bill
ABAG Association of Bay Area Governments
ACM Asbestos Containing Materials
ADA Americans with Disabilities Act
AFA Acre-Feet Annually
AICP American Institute of Certified Planners
ALUCP Airport Land Use Compatibility Plan
APN Assessor Parcel Number
BAAQMD Bay Area Air Quality Management District
BART Bay Area Rapid Transit
Basin Plan Water Quality Control Plan for the San Francisco Bay Basin Bgs Below the ground surface
BIA California Building Industry Association
BMPs Best Management Practices
Btu British thermal units
CA California
CalARP California Accidental Release Prevention
Cal Fire California Department of Forestry and Fire Protection CalEEMod California Emissions Estimator Model
CalEPA California Environmental Protection Agency
CALGreen California Green Building Standards Code
Caltrans California Department of Transportation
Cal/OSHA California Occupational Safety and Health Administration CARB California Air Resources Board
CBC California Building Standards Code
C/CAG San Mateo City and County Association of Governments CCR California Code of Regulations
CDFW California Department of Fish and Wildlife
CEC California Energy Commission
CEQA California Environmental Quality Act
2023-2031 Housing Element Update 284 Initial Study
City of San Bruno December 2022 (Revised January 2023)
CFCs Chlorofluorocarbons
CFR Code of Federal Regulations
CGS California Geological Survey
CH4 Methane
CHPS Collaborative for High-Performance Schools
CLUP San Mateo Comprehensive Land Use Plan
CNEL Community Noise Equivalent Level
CO Carbon monoxide
CO2 Carbon dioxide
CO2e Carbon dioxide equivalent
CRECs Controlled Recognized Environmental Conditions
CRHR California Register of Historical Resources
dBA A-weighted decibel
DNL Day-Night Level
DPM Diesel particulate matter
DTSC Department of Toxic Substances Control
EIR Environmental Impact Report
EPA U.S. Environmental Protection Agency
ESA Environmental Site Assessment
EZRI Earthquake Zones of Required Investigation
FAA Federal Aviation Administration
FAR Federal Aviation Regulations
FEMA Federal Emergency Management Agency
FHSZs Fire Hazard Severity Zones
FIRM Flood Insurance Rate Maps
FMMP Farmland Mapping and Monitoring Program
FTA United States Department of Transportation’s Federal Transit Administration General Plan San Bruno General Plan
GHGs Greenhouse gases
GPD Gallons per day
GWh Gigawatt hours
HCP Habitat Conservation Plan
HFCs Hydrofluorocarbons
2023-2031 Housing Element Update 285 Initial Study
City of San Bruno December 2022 (Revised January 2023)
HRECs Historically Recognized Environmental Conditions
IS Initial Study
ISO Insurance Services Office, Inc.

LBPs Lead-Based Paints
LED Light-Emitting Diode
LEED Leadership in Energy and Environmental Design
Leq Equivalent noise level
LID Low-Impact Development
Lmax Maximum A-weighted
LOS Level of Service
LRA Local Responsibility Area
MBTA Migratory Bird Treaty Act
Mgd Million gallons per day
MM Mitigation Measure
MND Mitigated Negative Declaration
Mpg Miles per gallon
Mph Miles per hour
MRP NPDES Permit
MRZs Mineral Resource Zones
MTC Metropolitan Transportation Commission
MT CO2e Metric tons of carbon dioxide equivalent
NAHC Native American Heritage Commission
NESHAP National Emission Standards for Hazardous Air Pollutants NFIP National Flood Insurance Program
NHPA National Historic Preservation Act
NOD Notice of Determination
NOI Notice of Intent
NOx Nitrogen oxides
NO2 Nitrogen dioxide
NPDES National Pollutant Discharge Elimination System
NRHP National Register of Historic Places
NWIC Northwest Information Center
O3 Ground-level ozone
2023-2031 Housing Element Update 286 Initial Study
City of San Bruno December 2022 (Revised January 2023)
OITC Outdoor/Indoor Transmission Class
OPR Office of Planning and Research
PCB Polychlorinated biphenyls
PCE Perchloroethylene
PG&E Pacific Gas & Electricity
PM Particulate matter
PM2.5 Fine particulate matter
PM10 Coarse particulate matter
PPC Public Protection Classification
PPV Peak Particle Velocity
REC Recognized environmental condition
RHNA Regional Housing Need Allocation
ROG Reactive organic gases
RPS Renewable Portfolio Standards
RWQCB Regional Water Quality Control Board
SamTrans San Mateo County Transit District
SSOs Sanitary Sewer Overflows
SB Senate Bill
SBGC San Bruno Garbage Company
SBFD San Bruno Fire Department
SBPD San Bruno Police Department
SFHA Special Flood Hazard Areas
SFO San Francisco International Airport
SFPUC San Francisco Public Utilities Commission
SHMA Seismic Hazards Mapping Act
SMARA Surface Mining and Reclamation Act
SMCWPPP San Mateo Countywide Water Pollution Prevention Program SMBG State Mining and Geology Board
SOx Sulfur oxides
SR State Route
SRA State Responsibility Area
SSF/SB WQCP South San Francisco-San Bruno Water Quality Control Plant STC Sound Transmission Class
2023-2031 Housing Element Update 287 Initial Study
City of San Bruno December 2022 (Revised January 2023)
SWPPP Storm Water Pollution Prevention Plan
SWRCB State Water Resources Control Board
TACs Toxic air contaminants
TCR Tribal Cultural Resources
TDM Transportation Demand Management
TIA Transportation Impact Analysis
USACE United States Army Corps of Engineers
USFWS United States Fish and Wildlife Service
UST Underground storage tank
VHFHSZs Very High Fire Hazard Severity Zones
VMT Vehicle Miles Traveled
VOCs Volatile Organic Compounds
Exhibit B
Mitigation Monitoring and Reporting Program (MMRP)

DRAFT MITIGATION MONITORING AND REPORTING PROGRAM
2023-2031 Housing Element Update

CITY OF SAN BRUNO
December 2022

P R E F A C E
Section 21081 of the California Environmental Quality Act (CEQA) requires a Lead Agency to adopt a Mitigation Monitoring and Reporting Program whenever it approves a project for which measures have been required to mitigate or avoid significant effects on the environment. The purpose of the monitoring and reporting program is to ensure compliance with the mitigation measures during project implementation.

The Initial Study for the 2023-2031 Housing Element Update concluded that the implementation of the project could result in significant effects on the environment and mitigation measures were incorporated into the proposed project or are required as a condition of project approval. This Mitigation Monitoring and Reporting Program addresses those measures in terms of how and when they will be implemented.

This document does not discuss those subjects for which the Initial Study concluded that the impacts from implementation of the project would be less than significant and for which no mitigation measures would be required. 2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 1

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
Mitigation Measures

AIR QUALITY
MM AIR-3.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites to implement the following measures during demolition and construction:
a. Use Tier 4 engines for all off-road equipment greater than 50 horsepower (hp) and operating for more than 20 total hours over the entire duration of construction activities.
b. Use diesel trucks with 2010 or later compliant model year engines during construction.
c. Use renewable diesel during construction.
d. Use low-VOC coatings during construction.
e. Implement BAAQMD best management practices and if necessary, enhanced measures recommended by BAAQMD.
f. Use portable electrical equipment where commercially available and practicable to complete construction. Construction contractors shall utilize electrical grid power instead of diesel generators when (1) grid power is available at the construction site; (2) when construction of temporary power lines are not necessary in order to provide power to portions of the site distant from existing utility lines; (3) when use of portable extension lines is practicable given construction safety and operational limitations; and (4) when use of electrical grid power does not compromise construction schedules.

Adopt a policy in the
Housing Element
Update that would
require MM AIR-3.1
be implemented at all
Housing Opportunity
Sites
Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 2

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
MM AIR-3.2: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites to conduct a construction and operational health risk assessment (HRA) prior to the issuance of discretionary permits that would allow demolition or construction activities to take place (whichever occurs first).

If the HRA demonstrates, to the satisfaction of the City, that the health risk exposures for adjacent receptors will be less than BAAQMD project-level thresholds, then additional mitigation would be unnecessary. However, if the HRA demonstrates that health risks would exceed BAAQMD project level thresholds, additional feasible on- and off-site mitigation shall be analyzed to further reduce risks to the greatest extent practicable.

Adopt a policy in the
Housing Element
Update that would
require future
development at all
Housing Opportunity
Sites to conduct a
construction and
operational health risk
assessment (HRA)
prior to the issuance of
discretionary permits.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division

BIOLOGICAL RESOURCES
MM BIO-1.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Sites to comply with the following measures:
a. Demolition and nesting substrate (e.g., trees, bushes, grasses, and other vegetation) removal activities shall be scheduled to avoid nesting season (February 1 to August 31). To the extent feasible, construction activities shall be scheduled to occur during the nonnesting season (September 1 through January 31). b. Prior to issuance of any discretionary permits that would allow construction activities during the nesting season, a qualified biologist shall complete pre-construction surveys for active nests within 14 days of work commencing. The survey area must include the proposed development area and all areas within 300 feet of the development area boundary (“zone of influence”). If active nest, Adopt a policy in the
Housing Element
Update that would
require future
development
implement MM BIO1.1 during demolition
and construction
activities.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 3

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
roost, or burrow sites are identified within the zone of influence, a no-disturbance buffer shall be established for all active nest sites prior to commencement of any proposed construction-related activities to avoid disturbances to migratory bird nesting activities. A no-disturbance buffer constitutes a zone in which construction activities cannot occur. The sizes of the buffers shall be determined by a qualified biologist based on the species, activities proposed near the nest, and topographic and other visual barriers. Buffers shall remain in place until the young have departed the area or fledged and/or the nest is inactive, as determined by the qualified biologist. c. If work is necessary within a buffer zone of an active bird nest, work may occur under the supervision of a qualified avian biologist. The qualified avian biologist monitoring the construction work shall have the authority to stop work and adjust buffers if any disturbance to nesting activity is observed.

CULTURAL RESOURCES
MM CUL-1.1:Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Site 14 to comply with the following measures:
a. Removal or alteration of the commemorative features of California Historic Landmark #934 shall be prohibited, and must be incorporated into any future development proposals for Site 14. b. As part of the future project-level CEQA analysis of any discretionary permit that would allow the demolition of the existing buildings located at Site 14, a Historic Resource Evaluation (HRE) shall be prepared by a qualified architect or architectural historian approved by the City and meeting the Secretary of the Interior's Adopt a policy in the
Housing Element
Update that would
require future
development
implement MM CUL1.1 prior to demolition
of any existing
buildings at Site 14.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 4

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
Professional Qualifications Standards published in the Code of Federal Regulations (36 CFR part 61). The HRE shall evaluate whether any of the existing buildings meet the definition of a historic resource pursuant to CEQA Guidelines Section 15064.5. If the existing buildings do not meet the definition of a historic resource, demolition may proceed. If the HRE finds that any of the existing buildings at Site 14 meet the definition of a historic resource, demolition of buildings eligible for listing as a historic resource shall be prohibited.
c. In the event that any buildings meeting the definition of a historic resource pursuant to CEQA Guidelines Section 15064.5 are identified, future development proposals for Site 14 shall be reviewed for compliance by a qualified architect or architectural historian approved by the City and meeting the Secretary of the Interior's Professional Qualifications Standards published in the Code of Federal Regulations (36 CFR part 61) with one or both of the following standards prior to issuance of any discretionary permits that would allow modifications to the existing buildings or new construction on Site 14:
• Secretary of Interior's Standards for the Treatment of Historic Properties with Guidelines for Preserving,
Rehabilitating, Restoring, and Reconstructing Historic
Buildings; or
• Secretary of Interior's Standards for Rehabilitation and Guidelines for Rehabilitating Historic Buildings (1995), Weeks and Grimmer.
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 5

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
MM CUL-2.1:Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Sites 6, 8, 10, 16, 18, and 19 to comply with the following measures:
a. If evidence of an archaeological site or other suspected cultural resource as defined by CEQA Guideline Section 15064.5,
including darkened soil representing past human activity (“midden”), that could conceal material remains (e.g., worked stone, worked bone, fired clay vessels, faunal bone, hearths, storage pits, or burials) is discovered during construction related earth-moving activities, all ground-disturbing activity within 100 feet of the resources shall be halted and the City Planning Manager shall be notified. The project sponsor shall hire a qualified archaeologist to conduct a field investigation. The City’s Planning Manager shall consult with the archaeologist to assess the significance of the find. Impacts to any significant resources shall be mitigated to a less-than-significant level through data recovery or other methods determined adequate by a qualified archaeologist and that are consistent with the Secretary of the Interior’s Standards for Archaeological documentation. Any identified cultural resources shall be recorded on the appropriate DPR 523 (A-J) form and filed with the NWIC.
b. Prior to the initiation of any site preparation and/or the start of construction, the project sponsor shall ensure that all construction workers receive training overseen by a qualified professional archaeologist who is experienced in teaching non-specialists, to ensure that contractors can recognize archaeological resources in the event that any are discovered during construction.

Adopt a policy in the
Housing Element
Update that would
require future
development at
Housing Opportunity
Sites 6, 8, 10, 16, 18,
and 19 prior to and
during construction
activities.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 6

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
MM CUL-2.2:Prior to approval, the 2023-2031 Housing Element shall be amended to include a policy requiring future development at Housing Opportunity Site 14 to comply with the following measures:
a. As part of the future project-level CEQA analysis of any discretionary permits that would allow ground-disturbing activities (e.g., grading, trenching, excavation, etc.) in the archaeological sensitive areas shown on Figure 4.5 1, exploratory trenching shall be conducted by a qualified archaeologist trained in both local prehistoric and historical archaeology within the proposed area of effect to determine if prehistoric- or historic-era archaeological resources are present. Explorations shall consist of at least one mechanically dug trench with excavation depths commensurate with the depth of proposed ground-disturbing activities. If any archaeological resources are exposed, these should be briefly documented, tarped for protection, and left in place. The results of the exploratory trenching shall be submitted to the Director of Community and Economic Development or the Director’s
designee. If it is determined by the project archaeologist that the proposed activities could damage an archaeological resource or that indications of other suspected archaeological resources are present (i.e., darkened soil “midden” representing past human activity), an Archaeological Resources Treatment Plan shall be prepared as described in MM CUL-2.1b below.
b. If recommended by the project archaeologist, an Archaeological Resources Treatment Plan shall be prepared by the project archaeologist that contains, at minimum:

Adopt a policy in the
Housing Element
Update that would
require future
development at
Housing Opportunity
Site 14 to conduct
exploratory trenching
consistent with MM
CUL-2.2.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 7

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
• Identification of the scope of work and range of subsurface effects (including location map and development plan),
including requirements for preliminary field investigations. • Description of the environmental setting (past and present) and the historic/prehistoric background of the parcel
(potential range of what might be found).
• Monitoring schedules and individuals
• Development of research questions and goals to be
addressed by the investigation (what is significant vs. what is redundant information).
• Detailed field strategy to record, recover, or avoid the finds and address research goals.
• Analytical methods. Report structure and outline of
document contents.
• Disposition of the artifacts.
• Security approaches or protocols for finds.
• Appendices: all site records, correspondence, and
consultation with Native Americans, etc.

Implementation of the treatment plan by the project archaeologist shall be required prior to the issuance of any permits related to ground-disturbing activities. The treatment plan shall utilize data recovery methods to reduce impacts on subsurface resources. The treatment plan shall be submitted to the Director of Community and Economic Development or the Director’s designee, along with a summary of the outcomes of the treatment plan and all associated documentation and recordation.
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 8

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
MM CUL-2.3:Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Site 14 to comply with the following measures:
a. Prior to the issuance of any discretionary permits that would allow ground-disturbing activities (e.g., grading, trenching, excavation, etc.) within the non-sensitive areas mapped on Figure 4.5 1, the project applicant shall hire a qualified archaeologist to develop a Worker’s Environmental Awareness Program (WEAP) to train the construction crew on the legal requirements for the treatment of cultural resources as well as procedures to follow in the event of a cultural resources discovery. This training program shall be given to the crew before ground disturbing work commences and shall include handouts to be given to new workers.
b. The applicant shall note on all construction plans that require ground disturbing activities that there is a potential for exposing buried cultural resources including prehistoric Native American burials.
c. In the event that potentially significant archaeological resources are encountered during ground-disturbing activities occurring at Site 14, all activity within a 50-foot radius of the find shall be stopped, the Director of Community and Economic Development or the Director's designee shall be notified, and the project archaeologist shall examine the find. The project archaeologist shall (1) evaluate the find(s) to determine if they meet the definition of an archaeological resource; and (2) make appropriate
recommendations regarding the disposition of such finds prior to issuance of building permits. Recommendations could include collection, recordation, and analysis of any significant cultural Adopt a policy in the
Housing Element
Update that would
require future
development at
Housing Opportunity
Site 14 to implement
MM CUL-2.3 prior to
the issuance of any
discretionary permits.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 9

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
materials. A report of findings documenting any data recovery shall be submitted to the Director of Community and Economic
Development or the Director's designee and the Northwest Information Center (if applicable).

MM CUL-3.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Sites 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 20, 22 and 23 to comply with the following measures:
a. If human remains are discovered at any project construction site during any phase of construction, all ground-disturbing activity within 100 feet of the resources shall be halted and the City’s Planning Manager and the San Mateo County Coroner shall be notified immediately, according to Section 5097.98 of the State Public Resources Code and Section 7050.5 of California’s Health and Safety Code. If the remains are determined by the County coroner to be Native American, the Native American Heritage Commission (NAHC) shall be notified within 24 hours, and the guidelines of the NAHC shall be adhered to in the treatment and disposition of the remains. The project sponsor shall also retain a professional archaeologist with Native American burial experience to conduct a field investigation of the specific site and consult with the Most Likely Descendant, if any, identified by the NAHC. As necessary, the archaeologist may provide professional assistance to the Most Likely Descendant, including the excavation and removal of the human remains. The City of San Bruno shall be responsible for approval of recommended mitigation as it deems appropriate, taking account of the provisions of State law, as set forth in CEQA Guidelines section 15064.5(e) and Public Resources Code section Adopt a policy in the
Housing Element
Update that would
require future
development at
Housing Opportunity
Sites 1, 2, 4, 5, 6, 7, 8,
9, 10, 11, 12, 14, 15,
16, 17, 20, 22 and 23
halt all grounddisturbing activities
within 100 feet of any
discovered resource,
consistent with MM
CUL-3.1.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 10

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
5097.98. The project sponsor shall implement approved mitigation, to be verified by the City of San Bruno, before the resumption of ground-disturbing activities within 100 feet of where the remains were discovered.

GREENHOUSE GAS EMISSIONS
MM GHG-1.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring applicants and their contractors to implement the following measures prior to and during construction:
a. Prior to issuance of any discretionary permits that would allow demolition or construction (grading, excavation, building, etc.) activities at the Housing Opportunity Sites, the applicant shall submit a construction management plan that demonstrates that:
• Alternative fueled (e.g. biodiesel, electric) construction vehicles/equipment shall make up at least 15 percent of the fleet;
• Buildings shall be constructed with local building materials of at least 10 percent (sourced from within 100 miles of the City limits); and
• Contractors shall recycle and reuse at least 50 percent of construction waste or demolition materials.

Adopt a policy in the
Housing Element
Update that would
require future
development submit a
construction
management plan prior
to the issuance of any
discretionary permit,
consistent with MM
GHG-1.1.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
MM GHG-1.2: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites to demonstrate adherence with the following design measures prior to issuance of any discretionary permits that would allow construction of residential units:
a. Construction of natural gas infrastructure and the use of natural gas appliances shall be prohibited;
Adopt a policy in the
Housing Element
Update that would
prohibit the
construction of natural
gas and use of natural
gas appliance, require
Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 11

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
b. Future developments shall include all electric appliances; c. At a minimum, future development shall comply with off-street electric vehicle requirements in the most recently adopted version of CALGreen Tier 2 requirements.
all electric appliances,
and comply with offstreet electric vehicle
requirements in the
most recently adopted
version of CALGreen
Tier 2 requirements.

HAZARDS AND HAZARDOUS MATERIALS
MM HAZ-2.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Sites 6, 8, 10, 16, 18, and 19 to comply with the following measure:
a. The City shall require a Phase I Environmental Site Assessment (Phase I ESA) prior to issuance of any discretionary permits that would allow ground-disturbing activities, with a Phase II ESA also required if the Phase I ESA indicates evidence of potential site contamination. The City shall also require compliance with the site assessment(s) and any remediation, removal, and disposal requirements for soil, surface water, and/or groundwater contamination enforced by the Department of Toxic Substances Control (DTSC), Regional Water Quality Control Board
(RWQCB), San Mateo County Department of Environmental
Health (SMCEHS), California Division of Occupational Safety and Health (CalOSHA), U.S. Environmental Protection Agency (EPA), and other jurisdictional agencies.

Adopt a policy in the
Housing Element
Update that would
require future
development at
Housing Opportunity
Sites 6, 8, 10, 16, 18,
and 19 prepare a Phase
I ESA prior to the
issuance of any
discretionary permits.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 12

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
MM HAZ-2.2: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Site 14 to comply with the following measures:
a. Prior to the issuance of any discretionary permits that would allow ground-disturbing activities on Site 14 (outside of the area shown on Figure 4.9 1), the project proponent shall obtain a Phase I Environmental Site Assessment (ESA). The Phase I ESA shall be conducted in accordance with the United States Environmental Protection Agency’s All Appropriate Inquiries (AAI) Rule and the latest American Society for Testing and Materials (ASTM International) guidelines, and identify all potential subsurface contaminants warranting further investigation.
b. If the Phase I ESA identifies any potential contaminants warranting further investigation, a Phase II ESA shall be prepared in accordance with the United States Environmental Protection Agency’s AAI Rule and the latest ASTM International guidelines.

As part of the Phase II, a qualified environmental professional (as defined in Title 40 of the California Code of Regulations) shall take soil, soil vapor, and groundwater samples as determined necessary by the environmental professional in the area of proposed disturbance at 0.5 feet below ground surface (bgs) to the maximum proposed depth of disturbance. Collected soil samples shall be tested for all potential contaminants identified in the Phase I ESA to determine if contaminants exceed California Division of Occupational Safety and Health (Cal/OSHA) exposure limits or San Mateo County Environmental Health Services (SMCEHS) environmental screening levels for residential uses.

Adopt a policy in the
Housing Element
Update that would
require future
development at
Housing Opportunity
Site 14 to prepare a
Phase I ESA prior to
the issuance of any
discretionary permits.

If the Phase I ESA
identifies potential
concerns, a Phase II
ESA would be
prepared.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 13

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
c. The results of the Phase II ESA shall be provided SMCEHS department. If determined necessary by the SMCEHS, a
Redevelopment Management Plan (RMP) or equivalent shall be prepared and submitted to the SMCEHS and the Director of Community and Economic Development or the Director’s designee that includes 1) an evaluation of whether redevelopment activities will create new exposure pathways to human health and the environment that pose unacceptable risks, and, if so, how those risks will be mitigated, and 2) a discussion of how contaminated media will be handled and disposed during construction activities.

Once approved by the SMCEHS and Community and Economic
Development Department, the RMP or equivalent shall be
implemented by a qualified environmental professional. The results of the RMP or equivalent shall be submitted to the SMCEHS and the Director of Community and Economic Development or the Director’s designee prior to the issuance of any issuance of any discretionary permits (e.g., grading, construction, occupancy, whichever occurs first).

MM HAZ-5.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at Housing Opportunity Site 14 to comply with the following measures:
a. Prior to the issuance of any construction or building permits, the applicant shall submit a plan with a list of equipment to be used during construction that includes their height and proposed area of operation to the Director of Community and Economic
Adopt a policy in the
Housing Element
Update that would
require future
development at
Housing Opportunity
Site 14 to submit a
plan that details the
type and location of
Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 14

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
Development or the Director’s designee. The use of equipment in locations where it would penetrate critical aeronautical surfaces shall be expressly prohibited by any construction or building permits issued. The plan sets shall include a page depicting the critical aeronautical surfaces on-site, a list of all equipment with heights of 55 feet or greater and their respective heights, and informs construction workers that the use of equipment with heights that would penetrate critical aeronautical surfaces is prohibited. b. Future development at Housing Opportunity Site 14 shall comply with Policy AP-3 of the Comprehensive Airport Land Use
Compatibility Plan for the Environs of San Francisco International Airport (ALUCP). Buildings with heights in excess of the applicable critical aeronautical surface as shown in Exhibit IV-17 at Housing Opportunity Site 14 shall be prohibited unless the Federal Aviation Administration determines the proposed building height is not a hazard to air navigation in an aeronautical study prepared pursuant to the filing of Form 7460-1. Proof of compliance with Policy AP-3 of the ALUCP shall be provided to the Director of Community and Economic Development or the Director’s designee prior to issuance of any construction or building permits. construction
equipment. In addition,
all plans shall include a
page depicting the
critical aeronautical
surfaces on-site, a list
of all equipment with
heights of 55 feet or
greater and their
respective heights, and
informs construction
workers that the use of
equipment with heights
that would penetrate
critical aeronautical
surfaces is prohibited.

NOISE
MM NOI-2.1: Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites to implement the following measures during demolition and construction:

Adopt a policy in the
Housing Element
Update that would
require future
development at all
Housing Opportunity
Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 15

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
• Groundborne vibration studies shall be prepared by qualified professionals in accordance with industry-accepted methodology where heavy construction activities involving significant site grading, underground, or foundation work will occur within 25 feet of residential or other vibration sensitive uses. The industryaccepted methodologies include the recommended vibration assessment procedure and thresholds provided by public agencies such as Caltrans or the Federal Highway Administration. The studies should identify necessary construction vibration controls to reduce both human annoyance and the possibility of cosmetic damage. Controls shall include, but not be limited to, the following measures:
o A list of all heavy construction equipment to be used for this project known to produce high vibration levels (tracked vehicles, vibratory compaction, jackhammers, hoe rams,
etc.) shall be submitted to the City by the contractor. This list shall be used to identify equipment and activities that would potentially generate substantial vibration and to define the level of effort for reducing vibration levels below the thresholds.
o Place operating equipment on the construction site as far as possible from vibration-sensitive receptors.
o Use smaller equipment to minimize vibration levels below the limits.
o Avoid using vibratory rollers and tampers near sensitive areas.
o Select demolition methods not involving impact tools.

Sites prepare
groundborne vibration
studies.
2023-2031 Housing Element Update December 2022
Mitigation Monitoring and Reporting Program Page 16

MITIGATION MONITORING AND REPORTING PROGRAM

SAN BRUNO HOUSING ELEMENT UPDATE PROJECT
Mitigation
Method of
Compliance Or
Mitigation Action
Timing of
Compliance
Oversight
Responsibility
o Modify/design or identify alternative construction methods to reduce vibration levels below the limits.
o Avoid dropping heavy objects or materials.

TRANSPORTATION
MM TRN-1.1:Prior to approval, the 2023-2031 Housing Element shall include a policy requiring future development at all Housing Opportunity Sites that would generate a sufficient amount of trips according to the City’s traffic analysis guidelines or otherwise warrant analysis as determined by the City to prepare a Transportation Analysis (TA) prior to the issuance of any discretionary permits. Prior to the preparation of the TA, a scope of work outlining the proposed approach to the TA shall be submitted to the Director of Public Works or the director’s designee for review and approval. The TA, at a minimum, shall evaluate the proposed development for consistency with the City’s General Plan and Walk ‘N Bike Plan, review the proposed layout for any geometric design features that may increase hazards (e.g., sight distances, turning radii, etc.), and verify adequate emergency access is provided. The TA shall provide recommendations addressing any identified inconsistencies, geometric design hazards, or emergency access issues that shall be incorporated into the final design. The TA shall be prepared in accordance with Public Works’ guidance and submitted prior to the approval of any discretionary permits as part of the project-level review of all future development under the Housing Element Update.

Adopt a policy in the
Housing Element
Update that would
require future
development at all
Housing Opportunity
Sites that would
generate a sufficient
amount of trips
according to the City’s
traffic analysis
guidelines or otherwise
warrant analysis as
determined by the City
to prepare a
Transportation
Analysis (TA) prior to
the issuance of any
discretionary permits.

Prior to approval of the
2023-2031 Housing
Element Update
Community and
Economic
Development
Department – Planning
Division
SOURCE: City of San Bruno, 2023-2031 Housing Element Update Initial Study, December 2022.

Exhibit C
Response to Comments Memo
2023-2031 Housing Element Update i Responses to Comments Memorandum City of San Bruno January 2023

TABLE OF CONTENTS
Section 1.0 Introduction ..................................................................................................................... 1 Section 2.0 Responses to IS/MND Comments .................................................................................. 2 Section 3.0 IS/MND Text Revisions ............................................................................................... 12 Section 4.0 Conclusion .................................................................................................................... 14 Appendix A: IS/MND Comment Letters
Appendix B: Revised Noise & Vibration Assessment (Revised January 17, 2023) Appendix C: Revised Figure 4.13-2
2023-2031 Housing Element Update 1 Responses to Comments Memorandum City of San Bruno January 2023
SECTION 1.0 INTRODUCTION
The Initial Study/Mitigated Negative Declaration (IS/MND) for the 2023-2031 Housing Element Update (“project”) was prepared in compliance with the requirements of the California Environmental Quality Act (CEQA). The 30-day public circulation period for the IS/MND started December 9, 2022, and ended January 9, 2023. Section 2.0 contains responses to comments submitted by agencies, organizations, and individuals during the IS/MND public review period.

Copies of the comment letters are attached to this document in Appendix A.

CEQA does not require formal responses to comments on an IS/MND and the decision-making body shall adopt the proposed MND only if it finds on the basis of the whole record before it, that there is no substantial evidence that the project will have a significant effect on the environment and the MND reflects the lead agency’s independent judgment and analysis [CEQA Guidelines §15074(b)].

Pursuant to CEQA Guidelines §15073.5, the recirculation of the MND is required when the document must be “substantially revised” after public notice of its availability. A “substantial revision” is defined as:
(1) A new, avoidable significant effect is identified and mitigation measures or project revisions must be added in order to reduce the effect to insignificance; or (2) The lead agency determines that the proposed mitigation measures or project revisions will not reduce potential effects to less than significance and new measures or revisions must be required.

In response to comments received during the public review period, the IS/MND was revised to clarify the location of the Housing Opportunity Sites in relation to the 2020 noise exposure contours provided on Figure IV-6 of the Comprehensive Airport Land Use Plan for the Environs of San Francisco International Airport (“SFO ALUCP”). Additionally, the IS/MND was revised to reflect the change in the name of the San Mateo County Flood Control District to the San Mateo County Flood and Sea Level Rise Resiliency District. Revisions to the IS/MND are shown in Section 3.0 below. No new, avoidable significant effects were identified, and no new mitigation measures or revisions are required to reduce potential effects to a less than significant level. Therefore, under CEQA Guidelines §15073.5, recirculation of the IS/MND is not required.
2023-2031 Housing Element Update 2 Responses to Comments Memorandum City of San Bruno January 2023
SECTION 2.0 RESPONSES TO IS/MND COMMENTS
Comments are organized by the source of the letter and its date. The specific comments from each of the letters and/or emails are presented, with each response to that specific comment directly following. Copies of the letters and emails received by the City of San Bruno are included in their entirety in Appendix A of this document. Comments received on the IS/MND are listed below.

Comment Letter and Commenter Page of Response
A. San Francisco International Airport (received January 9, 2023)........................................ 3 B. San Mateo County Flood and Sea Level Rise Resiliency District (received January 9, 2023) ................................................................................................................................... 8 2023-2031 Housing Element Update 3 Responses to Comments Memorandum City of San Bruno January 2023
A. San Francisco International Airport (received January 9, 2023) Comment A.1: San Francisco International Airport (SFO or the Airport) staff have reviewed the City of San Bruno’s (City) Initial Study/Mitigated Negative Declaration for the 2023-2031 Housing Element Update (IS/MND). We appreciate this opportunity to provide comments on the IS/MND.

As required by state law, the City’s Housing Element establishes goals, policies, and programs to help address the City’s current and future housing needs and includes a list of Housing Opportunity Sites. It is the City’s blueprint for housing-related decisions and sets an action plan for how to meet housing goals over the coming years. Through the state-mandated Regional Housing Needs Allocation (RHNA) process, the Association of Bay Area Governments (ABAG) allocated to the City 3,165 new housing units, which are to be accommodated on Housing Opportunity Sites. To comply with the California Environmental Quality Act (CEQA) for approval of the Housing Element Update, the City prepared an initial study (IS) of environmental impacts and the City intends to adopt a Mitigated Negative Declaration of Environmental Impacts (MND).

The majority of the City is located within Airport Influence Area B as defined by the Comprehensive Airport Land Use Compatibility Plan for the Environs of San Francisco International Airport (SFO ALUCP) adopted in October 2012 by the City/County Association of Governments of San Mateo County (C/CAG), which serves as the Airport Land Use Commission (ALUC). The SFO ALUCP governs land use development within the Airport Influence Area and addresses issues related to compatibility between Airport operations and proposed new land use developments, considering noise impacts, safety of persons on the ground and in flight, height restrictions/airspace protection, and overflight notification.

Response A.1: This comment does not raise any issues regarding the adequacy of the IS/MND; therefore, no further response is required.

Comment A.2: Noise Compatibility Two of the Housing Opportunity Sites identified in the Housing Element Update – the Shops at Tanforan (Site 14) and San Bruno Pet Hospital (Site 19) – are located within the 70-75 decibel (dB) Community Noise Equivalent Level (CNEL) contour identified in the SFO ALUCP. Another five Housing Opportunity Sites identified in the Housing Element Update (Sites 7, 15, 18, 20, and 21) are located within the 65-70 dB CNEL contour. In addition, many Airport departure procedures are designed to ascend over these sites, and residents on the sites would experience extreme and persistent noise from aircraft departures.

The IS/MND presents noise contours for SFO in Figure 4.13-2. The cited source of the noise contours is the SFO ALUCP (2012). However, the title of Figure 4.13-2 is “SFO 2020 Noise Exposure Contours” and the noise contours depicted do not match the noise contours shown in Figure IV-6 of the SFO ALUCP. Thus, the contours used to prepare the IS/MND are not the appropriate contours to use for noise impact analysis with respect to Airport noise. Rather, the IS/MND should use the noise contours presented in the SFO ALUCP, which are representative of the future noise profile of the Airport and are used by the ALUC to evaluate projects for noise compatibility. Any other noise contours, particularly contours based on past data, do not account for future activity and are not representative of future noise exposure. Thus, the noise impacts at the Housing Opportunity Sites are not accurately characterized in the IS/MND. 2023-2031 Housing Element Update 4 Responses to Comments Memorandum City of San Bruno January 2023
Response A.2: The commenter is correct that the noise exposure contours used for Figure 4.13-2 of the IS/MND do not match Figure IV-6 of the SFO ALUCP and the cited source of the noise contours in Figure 4.13-2 is incorrect. Figure 4.13-2 actually uses the 2001 noise contours provided in Figure D-2 of the SFO ALUCP. However, the use of the older noise contours resulted in a more conservative analysis, since the boundaries of the 2001 70-75 dB CNEL and 65-70 dB CNEL noise contours encompassed more of the Housing Opportunity Sites than the 2020 70-75 dB CNEL and 65-70 dB CNEL noise contours provided in Figure IV-6 of the SFO ALUCP.

Under either noise exposure projection scenario, none of the Housing Opportunity Sites are located within the 75+ dB CNEL noise contour. The IS/MND, using the 2001 noise contours, identified more sites as being located within the 70-75 dB CNEL and 65-70 dB CNEL than what is asserted by the commenter, based on the 2020 noise contours provided in Figure IV-6 of the SFO ALUCP. Sites 14 and 19 are correctly identified by the IS/MND as being located within the 70-75 dB CNEL noise contour, and the aircraft noise exposure of Sites 15, 18, and 21 using the 2020 noise contours provided in Figure IV-6 of the SFO ALUCP would be less than what is reported in the IS/MND, which used the 2001 noise contours. Further, the IS/MND correctly identified Sites 7 and 20 as being located within the 65-70 dB CNEL noise contour. Use of the 2020 noise exposure contours as recommended by the commenter would result in a lesser impact, i.e., exposure of Housing Element sites to elevated aircraft noise, than what was disclosed in the IS/MND. Figure 4.13-2 has been updated to show the relationship of the Housing Opportunity Sites to the 2020 noise exposure contours as opposed to the 2001 noise exposure contours, and pages 145- 146 and 203-204 have been revised accordingly. Please see Section 3.0 of this Memorandum for the full text of revisions to the IS/MND. The updated Figure 4.13-2 is provided in Appendix C.

Comment A.3: Conditional Compatibility of Residential Uses within SFO ALUCP 65-70 dB Noise Contour According to the SFO ALUCP, housing is conditionally compatible within the 65-70 dB CNEL noise contour provided that sound insulation is provided to reduce interior noise levels from exterior sources to CNEL 45 dB or lower and that an avigation easement is granted to the City and County of San Francisco as operator of SFO. This avigation easement requirement for housing within the 65-70 dB CNEL noise contour and higher should be specifically identified as a mitigation measure for Impact NOI-3 and the impact statement conclusion should be revised to “Less than Significant with Mitigation Incorporated”.

Response A.3: Consistent with the definition provided in the SFO ALUCP, an avigation easement provides a right-of-way in, through, across, or about any portion of the airspace above and within the vicinity of the subject real property for the free, safe, and unobstructed passage of aircraft in flight. Granting of an avigation easement by property owners in areas with an aircraft noise exposure of 65 dB CNEL or greater is required by the SFO ALUCP and San Bruno General Plan Policy HS-42; therefore, there is no need for mitigation to further require the granting of an avigation easement. The granting of an avigation easement would be a condition of approval, implementing GP Policy HS-42, for future residential projects located within the affected areas. Further, the relevant question under Impact NOI-3 is whether the 2023-2031 Housing Element Update 5 Responses to Comments Memorandum City of San Bruno January 2023
project would expose people residing in the project area to excessive noise levels.

The granting of an avigation easement does not reduce noise impacts, and is already a requirement per GP Policy HS-42 and not necessary or beneficial in reducing impacts associated with the exposure of future residents at the Housing Opportunity Sites to noise (including aircraft operations noise).

Comment A.4: Incompatibility of Residential Uses within SFO ALUCP 70-75 dB Noise Contour The SFO ALUCP also specifies that housing is an incompatible land use within the 70-75 dB CNEL noise contour except for an existing lot of record that was zoned solely for residential use as of the ALUCP’s effective date. We understand that when the current SFO ALUCP was adopted in November 2012, both the Shops at Tanforan lot and the San Bruno Pet Hospital lot (Housing Opportunity Sites 14 and 19, respectively) were zoned for commercial use; therefore, residential uses on those sites are incompatible with the SFO ALUCP Noise Compatibility Policies, creating an airport land use incompatibility with respect to noise on those sites. For this reason and because the Impact NOI-3 discussion only considers attenuation of indoor noise levels and does not address noise exposure of residents when windows are opened or when outdoors, Impact NOI-3’s impact conclusion of “Less than Significant Impact” is unsupported.

Response A.4: The commenter is correct that Sites 14 and 19 were not zoned for residential use at the time of adoption of the SFO ALUCP on November 8, 2012; this is documented in Section 2.5.3 on page 6 of the IS/MND. However, noise levels between 70-75 dB CNEL are common in urban residential areas and are not inherently incompatible with residential uses. This is consistent with guidance provided by the United States (U.S.) Environmental Protection Agency (EPA) and the U.S. Department of Housing and Urban Development (HUD), which consider average daytime noise levels greater than 75 dBA (where impacts to hearing loss can begin to occur) to be unacceptable for residential uses. [1][2] As documented in
Appendix B of the IS/MND and this Memorandum, Sites 14 and 19 experience average daytime noise levels in the range of 68 to 72 dBA Leq, and therefore future residents at the Housing Opportunity Sites would not be subjected to persistent excessive noise when outdoors. Further, the California Building Code (Title 24, Part 2), the San Bruno General Plan (Policy HS-35) and the SFO ALUCP (Policy NP-4) only require future development to achieve an interior noise level of 45 dB CNEL. As documented in the discussion under Impact NOI-3 on pages 203-204 of the IS/MND and in Appendix B, future residential development at the Housing Opportunity Sites would be able to achieve this standard and would be required to demonstrate that the building design achieves this standard prior to issuance of occupancy permits. During intermittent periods when outdoor noise reaches the level of receptor annoyance, future residents would be able to go indoors where they would experience noise levels of 45 dB or less. For the reasons stated above, future residential development 1 U.S. EPA (U.S. Environmental Protection Agency). Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety. March 1974. 2 Code of Federal Regulations Title 24 Part 51 Environmental Criteria and Standards. 2023-2031 Housing Element Update 6 Responses to Comments Memorandum City of San Bruno January 2023
at the Housing Opportunity Sites would not expose future residents to excessive noise levels, and therefore no mitigation is necessary.

Comment A.5: On November 10, 2022, the ALUC issued a determination that the City’s Draft 2023-2031 Housing Element Update was inconsistent with the SFO ALUCP’s Noise Compatibility Policies. On November 15, 2022, the San Bruno City Council adopted Resolution No. 2022-112 making draft findings (Draft Findings) and declaring an intent to consider overriding the ALUC determination. SFO sent a comment letter to the City on December 16, 2022 objecting to the override on the grounds that the Shops at Tanforan and the San Bruno Pet Hospital sites are located within the Airport’s 70-75 dB CNEL contour and therefore residential development is not appropriate on those sites. SFO’s comment letter is attached hereto as Attachment A and incorporated by reference. The key points made in that letter are summarized below:
• The City’s Draft Findings contain no findings of fact to support overriding the ALUC’s inconsistency determination. The Draft Findings only address residential land use within the 65-70 dB CNEL contour, but there is no discussion of residential land use within the 70-75 dB CNEL contour.
• The City’s Draft Findings discuss the RHNA allocations, the proposed sites’ proximity to mass transit, and the region’s and State’s housing affordability crisis, which are not germane to whether adoption of the Draft Housing Element would increase the public’s exposure to noise hazards.
• The City should impose enforceable Conditions of Approval on new residential developments within the 70-75 dB CNEL contour as stated in the Draft Findings.

Finally, we emphasize that where residential development is sited within the 70-75 dB CNEL contour, grant of an avigation easement is essential to ensuring that an override of the ALUC’s inconsistency finding would comply with California Public Utilities Code section 21670, particularly its goal to “prevent the creation of new noise and safety problems.” Without a recorded easement, future owners and occupants of residential units within the 70-75 dB CNEL contour may not have notice of the override decision or of the Airport’s resulting immunity from liability. Consistent with the legislative findings in the Public Utilities Code, it is imperative that the City require the grant of an avigation easement for these residential developments. The avigation easement should state that the City overrode the ALUC’s inconsistency finding, describe the immunity granted to the Airport under California Public Utilities Code section 21678, and make clear that the avigation easement is in addition to, and does not limit, the Airport’s immunity.

As the largest employment center in San Mateo County, SFO recognizes the importance of increasing housing supply and affordability in the San Francisco Bay Area and throughout California. While the Airport believes that ABAG should have included airport noise criteria in its RHNA methodology, we acknowledge that the City’s RHNA allocation requires it to plan for an additional 3,165 housing units. The Airport again urges the City to consider alternative locations to meet RHNA requirements outside the 70-75 dB CNEL noise contour, including the 2101 Sneath Lane Residential Project, the Bayhill Specific Plan area, 1010 Admiral Court, and the transit-oriented development corridors along El Camino Real and San Mateo Avenue. 2023-2031 Housing Element Update 7 Responses to Comments Memorandum City of San Bruno January 2023
Response A.5: Please see Response A.4 regarding the compatibility of residential development in noise exposure areas of 70-75 dB CNEL. The commenter’s assertions regarding the inadequacy of Resolution No. 2022-12 (bullet points 1 and 2) are unrelated to the adequacy of the IS/MND and the analysis contained therein concerning the compatibility of the Housing Opportunity Sites with the noise exposure contours; therefore, no further response is required. Bullet point 3 does not set forth any specific conditions of approval that should be imposed on future residential development within the 70-75 dB CNEL exposure areas besides the requirement of an avigation easement. Please see Response A.3 regarding avigation easements in relationship to CEQA and the relevant question regarding the exposure of future residents to aircraft noise. As noted in Response A.4, future residential development by law would be required to demonstrate compliance with Title 24 interior noise standards prior to the issuance of occupancy permits. As noted by the commenter in Comment A.6 below, residential development at the Housing Opportunity Sites is compatible with their respective safety compatibility zones set forth in the SFO ALUCP, and therefore there is no nexus between safety hazards and avigation easements. The final paragraph of Comment A.5 is noted by the City of San Bruno but does not raise any issues regarding the adequacy of the IS/MND; therefore, no further response is required.

Comment A.6: Safety Compatibility If the Housing Element Update is adopted, Housing Opportunity Site 14 (The Shops at Tanforan) would be located in Safety Compatibility Zone 4 (Outer Approach/Departure Zone) and Housing Opportunity Sites 15 (170 San Bruno Avenue West) and 21 (104 San Bruno Avenue West) would be located in Safety Compatibility Zone 3 (Inner Turning Zone). Residential land use is not incompatible in either Safety Compatibility Zone. Therefore, the Housing Element Update does not appear to be incompatible with the Safety Compatibility Policies of the SFO ALUCP. However, we note that for both Safety Compatibility Zones 3 and 4, Biosafety Level 3 and 4 facilities, children’s schools, large child day care centers, hospitals, nursing homes, stadiums, and arenas are considered incompatible uses. Moreover, hazardous uses other than Biosafety Level 3 and 4 facilities and critical public utilities should be avoided in these zones.

Response A.6: None of the Housing Opportunity Sites would be developed with biosafety, school, daycare, hospital, nursing home, stadiums or arena land uses as a result of the project, which is limited to residential development within the City. As noted on Page 1 of the IS/MND, the IS/MND “… evaluates the environmental impacts that might reasonably be anticipated to result from implementation of the proposed project at a program level. If a subsequent activity would have effects that are not within the scope of this Initial Study, then the City must prepare a new Initial Study leading to a Negative Declaration, a Mitigated Negative Declaration, or an Environmental Impact Report (EIR).” Accordingly, any future development proposal at the Housing Opportunity Sites that includes the aforementioned uses would be required to conduct subsequent project-level analysis of the associated impact of these uses in accordance with CEQA. This comment does not raise any issues regarding the adequacy of the IS/MND; therefore, no further response is required.

Comment A.7: Airspace Compatibility As described in Exhibit IV-17 of the SFO ALUCP (see Attachment B), the critical aeronautical surfaces at the Housing Opportunity Sites are as low as an 2023-2031 Housing Element Update 8 Responses to Comments Memorandum City of San Bruno January 2023
elevation of approximately 125 feet above mean sea level (AMSL) as defined from the origin of the North American Vertical Datum of 1988 (NAVD88). This occurs at the southeast corner of Housing Opportunity Site 14 (The Shops at Tanforan). While specific elevations of buildings at the proposed housing sites are not identified in the IS/MND, the document states that building elevations at Housing Opportunity Site 14 are limited by Ordinance 1446 to 126 feet and 9 inches AMSL.

Moreover, the IS/MND states that future building heights would be required to comply with SFO ALUCP Policy AP-3, which limits maximum building heights to the lower of (1) the height shown on the SFO critical aeronautical surfaces map (Exhibits IV-17 and IV-18 of the SFO ALUCP), or (2) the maximum height determined not to be a “hazard to air navigation” by the Federal Aviation Administration (FAA) in an aeronautical study prepared pursuant to the developer’s filing of Form 7460-1. Thus, based on Ordinance 1446 and ALUCP Policy AP-3, the maximum height of residential development on Housing Opportunity Site 14 would be below SFO’s critical aeronautical surfaces and the Housing Element Update would not appear to be inconsistent with the SFO ALUCP’s Airspace Compatibility Policies, subject to the issuance of a Determination of No Hazard by the FAA (see below) and the ALUC for any proposed structures.

Notwithstanding that the Housing Element Update appears to be consistent with the SFO ALUCP’s Airspace Compatibility Policies, future proposed development projects in the City are still required to undergo FAA airspace review as described in 14 Code of Federal Regulations Part 77 for both (1) the permanent structures and (2) any equipment taller than the permanent structures required to construct those structures.

Response A.7: This comment summarizes information included in the IS/MND, and describes future FAA review requirements, and is noted by the City of San Bruno, however, as this comment does not raise any issues regarding the adequacy of the IS/MND, no further response is required.

Comment A.8: Due to the proximity of the Housing Element Update’s identified Housing Opportunity Sites to the Airport, Airspace Protection Policies (AP-1 through AP-4) from the SFO ALUCP are enclosed (Attachment B) as reminders of incompatible site characteristics, especially as it pertains to wildlife attractants, particularly large flocks of birds, that pose threats to safe aircraft operations, and building materials or features that reflect and create bright lights or glare.

Response A.8: This comment is noted by the City of San Bruno, and these policies will be taken into account when specific project proposals are submitted to the City.

As this comment does not raise any issues regarding the adequacy of the IS/MND, no further response is required.

B. San Mateo County Flood and Sea Level Rise Resiliency District (received January 9, 2023)
Comment B.1: The San Mateo County Flood and Sea Level Rise Resiliency District (OneShoreline) and the County of San Mateo Department of Public Works, in its capacity as a consultant for OneShoreline, has reviewed the San Bruno 2023–2031 Housing Element Update and offer the following comments.
2023-2031 Housing Element Update 9 Responses to Comments Memorandum City of San Bruno January 2023
Effective January 1, 2020, A.B. 825 (C.A., 2019) amended the San Mateo County Flood Control District Act to expand the San Mateo County Flood Control District's responsibilities, create an independent governing board for the District, and rename the District the San Mateo County Flood and Sea Level Rise Resiliency District (OneShoreline). The flood zones (Colma Creek, San Bruno Creek, San Francisquito Creek, and Ravenswood Slough) that were formerly administered by the County of San Mateo Department of Public Works are now being managed by the new District.

Therefore, where the former San Mateo County Flood Control District was used in the City’s ISMND shall be updated to the San Mateo County Flood and Sea Level Rise Resiliency District.

Response B.1: Pages 160 and 167 have been revised to reflect the change in the name of the San Mateo County Flood Control District to the San Mateo County Flood and Sea Level Rise Resiliency District. Revisions to the IS/MND are shown in Section 3.0 of this Memorandum.

Comment B.2: For proposed developments in the Sea Level Rise Overlay District in San Bruno, OneShoreline would like to work with the City to review and comment on projects early in the development review process to ensure that flooding risks are evaluated and resilient design practices are incorporated into projects early. OneShoreline defines the Sea Level Rise Overlay District as the composite area including:
a. The area within Flood Zone X or V of the Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map (FIRM); and
b. The area identified in the Our Coast, Our Future Hazard Map as the 100-year flood plus 6.6 feet of sea level rise (based on modeling results from the U.S. Geological Survey).

Response B.2: The City will work with OneShoreline early in the review process on a project by project basis on proposed developments in the Sea Level Rise Overlay District in San Bruno. As this comment does not raise any issues regarding the adequacy of the IS/MND, no further response is required.

Comment B.3: Proposed developments proximate to San Bruno Creek should expect that flood/sea level rise protection and other enhancements (Flood Protection Infrastructure) in this area will be improved on a regional scale to align with long-term sea level rise protection along adjoining areas of the shoreline. To avoid a scenario where a development site must be retrofitted to accommodate this Flood Protection Infrastructure in a way that disrupts the site in the future, developers should coordinate directly with staff of OneShoreline and other relevant stakeholders to ensure proposed development applications align with a comprehensive and specific plan for long-term sea level rise protection in the San Bruno watershed.

Response B.3: The City will work with OneShoreline early in the review process on a project by project basis on proposed developments in the Sea Level Rise Overlay District in San Bruno. As this comment does not raise any issues regarding the adequacy of the IS/MND, no further response is required.

Comment B.4: For proposed developments and adjacent public and private assets to function under long-term future climate-driven conditions, stormwater conveyance infrastructure for all proposed sites should be designed with future conditions in mind. 2023-2031 Housing Element Update 10 Responses to Comments Memorandum City of San Bruno January 2023
a. For stormwater conveyance infrastructure impacted by coastal hazards, infrastructure should be designed (e.g., through elevations, backflow valves) such that it can continue to function during a Bay water level equivalent to the Base Flood Elevation (BFE) defined by FEMA plus 6 feet. This is the OneShoreline Protection Standard. b. As another aspect of climate change is the occurrence of infrequent, but more extreme, storm events, proposed developments should ensure that at least the first 1.25 inches of rainwater from an individual storm event remains on the development site.

Response B.4: The City will require all stormwater conveyance infrastructure to accommodate the first 1.25 inches of on-site rainwater and be designed to withstand a bay water level equivalent to the Base Flood Equivalent. As this comment does not raise any issues regarding the adequacy of the IS/MND, no further response is required.

Comment B.5: For proposed developments in the San Bruno Creek Flood Control Zone and Colma Creek Flood Control Zone (Zones) that require modification of site storm drain systems and site runoffs, the City shall include OneShoreline in the project/plan review process.

Response B.5: The City will include OneShoreline in the review process for any development within the San Bruno Creek Flood Control Zone and Colma Creek Flood Control Zone. As this comment does not raise any issues regarding the adequacy of the IS/MND, no further response is required.

Comment B.6: For the proposed development sites that are located within the Zones, OneShoreline requires that the discharge rate from each of these development sites not exceed the existing rate prior to development, and drainage analyses and calculations showing existing and future discharge rates must be submitted for review and approval. If it is determined that the future discharge rate exceeds the existing rate, an on-site storm water detention system, which would release surface runoff at a rate comparable to the existing flow rate of the site, must be designed and incorporated into the project.

Response B.6: The City will require that development within the San Bruno Creek Flood Control Zone and Colma Creek Flood Control Zone include drainage analyses and calculations showing existing and future discharge rates. Because the City will include OneShoreline in the review process for any development within these zones, OneShoreline will be able to determine if development will release surface runoff at a rate comparable to the existing flow rate of the site. This comment does not raise any issues regarding the adequacy of the IS/MND, therefore, no further response is required.

Comment B.7: OneShoreline encourages trash management measures be incorporated into future projects’ design elements of the storm drainage system and appurtenances to keep trash out of local creeks, streams and OneShoreline’s flood channels. Please ensure that the trash collecting devices are installed at storm drain inlets and maintained by the property owner(s). 2023-2031 Housing Element Update 11 Responses to Comments Memorandum City of San Bruno January 2023
Response B.7: The City requires the maintenance of stormwater conveyance infrastructure to keep trash out of the storm drainage system and requires the property owner to record a stormwater maintenance agreement prior to building permit issuance. As this comment does not raise any issues regarding the adequacy of the IS/MND, no further response is required.

Comment B.8: OneShoreline anticipates that the City will be reviewing any bio-retention facilities proposed by future projects for compliance with requirements of Provision C.3.d of the NPDES Municipal Regional Stormwater Permit (Order No. R2-2022-0018) from the San Francisco Bay Regional Water Quality Control Board.

The City reviews all stormwater conveyance infrastructure for compliance with C.3 requirements.

This comment does not raise any issues regarding the adequacy of the IS/MND, therefore, no further response is required.
2023-2031 Housing Element Update 12 Responses to Comments Memorandum City of San Bruno January 2023
SECTION 3.0 IS/MND TEXT REVISIONS
This section contains revisions to the text of the 2023-2031 Housing Element Update IS/MND dated December 2022. Revised or new language is underlined. All deletions are shown with a line through the text.

Pages 145 Section 4.9.1.2 Existing Conditions, Housing Opportunity Site 18, revised as follows:

Housing Opportunity Site 18 is developed with a two-story office building, pedestrian plaza, and surface parking lot. Site 18 is not on the Cortese List. The nearest school is the El Portal Special Education School, located approximately 0.3-miles west of Site 18. SFO is located approximately

1.3-miles east of Site 18, which is located beyond the outer boundary of the safety compatibility zones established in the ALUCP, but within the 65-70 dB CNEL noise contour. Critical aeronautical surfaces at Site 18 are 65 feet AGL or greater. As shown on Figure 4.20-1, Site 18 is not located within a Wildland Fire Hazard Area or Wildland/Urban Interface Area.

Pages 146 Section 4.9.1.2 Existing Conditions, Transit Corridors Plan Area Sites, 2nd paragraph, revised as follows:

The eastern boundary of the TCP area is located approximately 0.5-miles west of SFO;. Sites 7 and 20 are located in the 65-70 dB CNEL noise contour but outside of any safety compatibility zones.

Sites 15 and 21 are located within the 65-70 dB noise contour and Safety Compatibility Zone 3. Aall of the remaining Housing Opportunity Sites located within the TCP are located beyond the outer boundary of safety compatibility zones and CNEL noise contours established in the ALUCP. Critical aeronautical surfaces in the TCP area are 100 feet AGL in height or greater.