Agenda packet — Palo Alto City Council, November 13, 2023 (part 2 of 3)

California Renewable Portfolio Standard. California’s
RPS obligates investor-owned utilities, energy service
providers, and community choice aggregators to
procure 33 percent total retail sales of electricity from renewable energy sources by 2020, 60 percent by 2030,
and 100 percent by 2045.

Consistent. Electricity for future development would be provided by CPAU which has provided 100 percent carbon neutral
electricity since 2013 (City of Palo Alto 2022b).

Energy Action Plan. In the October 2005, the CEC and
CPUC updated their energy policy vision by adding
some important dimensions to the policy areas
included in the original EAP, such as the emerging
importance of climate change, transportation-related
energy issues, and research and development activities.

The CEC adopted an update to the EAP II in February
2008 that supplements the earlier EAPs and examines
the State’s ongoing actions in the context of global
climate change. The nine major action areas in the EAP
include energy efficiency, demand response, renewable
energy, electricity adequacy/reliability/infrastructure, electricity market structure, natural gas
supply/demand/infrastructure, transportation fuels
supply/demand/infrastructure,
research/development/demonstration, and climate
change.

Consistent. Future development facilitated by the proposed project would be required to be constructed in accordance with the latest iteration of CALGreen, the California Energy Code, and any locally adopted amendments, which include requirements for the use of energy-efficient design and technologies as well as provisions for incorporating renewable energy resources into building design. Electricity for future development would be provided by CPAU which has provided 100 percent carbon neutral electricity since 2013 (City of Palo Alto 2022b). Given these features, the project would facilitate implementation of the nine major action areas in the EAP.

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IMPACT ANALYSIS
ENERGY
68 | Page Addendum to the 2030 Comprehensive Plan EIR Renewable Energy or Energy Efficiency Plan Proposed Project Consistency AB 1007: State Alternative Fuels Plans. The State
Alternative Fuels Plan assessed various alternative fuels and developed fuel portfolios to meet California’s goals to reduce petroleum consumption, increase alternative
fuels use, reduce GHG emissions, and increase in-State
production of biofuels without causing a significant
degradation of public health and environmental quality.

Bioenergy Action Plan, EO S-06-06. The EO establishes
the following targets to increase the production and
use of bioenergy, including ethanol and biodiesel fuels made from renewable resources: produce a minimum
of 20 percent of its biofuels in California by 2010, 40 percent by 2020, and 75 percent by 2050.

Consistent. The project would not interfere with or obstruct the production of biofuels in California. Vehicles used by future residents would be fueled by gasoline and diesel fuels blended with ethanol and biodiesel fuels as required by CARB regulations.

Pursuant to Section 16.14.420 of the PAMC, new multi-family residences would be required to provide at least one EVSE Ready outlet or EVSE installed for each residential unit in the structure for residential parking, and would be required to provide Conduit Only, EVSE Ready Outlet, or EVSE installed for at least 25 percent of guest parking spaces, among which at least 5 percent shall be EVSE installed. Future development facilitated by the project would be required to comply with the most updated EV
requirements in both the City’s Reach Code and Title 24 at the time of construction.

Title 24, CCR – Part 6 (Building Energy Efficiency
Standards) and Part 11 (CALGreen). The 2019 Building
Energy Efficiency Standards move toward cutting
energy use in new homes by more than 50 percent and
will require installation of solar photovoltaic systems for single-family homes and multi-family buildings of
three stories and less. The CALGreen Standards
establish green building criteria for residential and
nonresidential projects. The 2019 Standards include the following: increasing the number of parking spaces that must be prewired for electric vehicle chargers in
residential development; requiring all residential
development to adhere to the Model Water Efficient
Landscape Ordinance; and requiring more appropriate
sizing of HVAC ducts.

Consistent. Development facilitated by the project would be required to comply with PAMC Chapter 16.17, which mandates the implementation of Title 24.

Furthermore, the City’s 2030 Comprehensive Plan and Sustainability and Climate Action Plan (S/CAP) also contains goals and policies related to energy efficiency and renewable energy. As discussed under Table 18 in Section 8, Greenhouse Gas Emissions, the proposed project would be consistent with recommended goals, policies, and actions in the City’s S/CAP related to energy efficiency and renewable energy. Table 15 summarizes the project’s consistency with the applicable 2030 Comprehensive Plan policies. As shown therein, the proposed project would be consistent with the applicable 2030 Comprehensive Plan policies and therefore would not conflict with or obstruct a State or local plan for renewable energy or energy efficiency, and impacts would be less than significant and generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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Table 15 Project Consistency with Applicable 2030 Comprehensive Plan policies Policies Project Consistency
Natural Environment Element
Policy N-7.4: Maximize the conservation and
efficient use of energy in new and existing
residences and other buildings in Palo Alto.

Consistent: Future development facilitated by the proposed HEU would be required to be constructed in accordance with the latest iteration of CALGreen, the California Energy Code, and any locally adopted amendments, which include green building practices. Future development would also be required to comply with the City’s most updated Reach Code and All-Electric Mandate which requires all-electric building design for single-family, low-rise multi-family, and non- residential development (City of Palo Alto 2022a).

Policy N-7.5: Encourage energy efficient lighting
that protects dark skies and promotes energy
conservation by minimizing light and glare from
development while ensuring public health and
safety
Consistent: Future development facilitated by the proposed HEU would be required to incorporate sustainability considerations into project design such as energy efficient lighting pursuant to PAMC Section

18.24.100(a). Future development would also be subject to PAMC Section 18.40.250 which outlines requirements for minimizing light spillover and glare.

Policy N-7.6: Support the maximum economic
use of solar electric (photovoltaic) and solar
thermal energy, both as renewable supply
resources for the Electric Utility Portfolio and as
alternative forms of local power generation.

Consistent: Development facilitated by the proposed HEU would be required to comply with the PAMC Chapter 16.17, which mandates the implementation of Title 24. Compliance would include complying with the most updated rooftop solar requirements at the time of construction.

Policy N-7.7: Explore a variety of cost-effective
ways to reduce natural gas usage in existing and
new buildings in Palo Alto in order to reduce
associated greenhouse gas emissions.

Consistent: Future development facilitated by the proposed HEU would also be required to comply with the City’s most updated Reach Code and All-Electric Mandate which requires all-electric building design for single- family, low-rise multi-family, and non-residential development (City of Palo Alto 2022a). Electricity would be provided by City of Palo Alto Utilities (CPAU), which has provided 100 percent carbon neutral electricity since 2013 (City of Palo Alto 2022b).

Policy N-7.8: Support opportunities to maximize
energy recovery from organic materials such as
food scraps, yard trimmings and residual solids
from sewage treatment.

Consistent: Future development facilitated by the proposed HEU would be required to comply with SB 1383 and recycle organic wastes.

Source: City of Palo Alto 2017b

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would be required to comply with federal, State, and local regulations as well as policies adopted in compliance with Mitigation Measure UTIL-17 pertaining to energy, which would reduce impacts to a less than significant level. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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7 Geology and Soils

1. Rupture of a known
earthquake fault, as
delineated on the most
recent Alquist-Priolo
Earthquake Fault
Zoning Map issued by
the State Geologist for
the area or based on
other substantial
evidence of a known
fault?
EIR Pages 4.5-4
through 4.5-6
No No No N/A

2. Strong seismic ground
shaking?
EIR Pages 4.5-4
through 4.5-6
No No No N/A

3. Seismic-related ground
failure, including
liquefaction?
EIR Pages 4.5-4
through 4.5-6
No No No N/A

4. Landslides?
EIR Pages 4.5-4
through 4.5-6
No No No N/A
b. Result in substantial soil
erosion or the loss of
topsoil?
EIR Pages 4.5-8
through 4.5-9
No No No Yes
c. Be located on a geologic
unit or soil that is made
unstable as a result of the
project, and potentially
result in on or offsite
landslide, lateral
spreading, subsidence,
liquefaction, or collapse?
EIR Pages 4.5-7
through 4.5-8
No No No N/A
d. Be located on expansive
soil, as defined in Table
18-1-B of the Uniform
Building Code (1994),
creating substantial risks
to life or property?
EIR Pages 4.5-4
through 4.5-6
No No No Yes
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GEOLOGY AND SOILS
72 | Page Addendum to the 2030 Comprehensive Plan EIR

Where was
Impact Analyzed
in the EIR?
Could Proposed
Changes
Involve New or
Substantially
More Severe
Impacts?
Do New
Circumstances
Result in New
or Substantially
More Severe
Impacts?
Does New
Information
Result in New or
Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address
and/or
Resolve
Impacts?
e. Have soils incapable of
adequately supporting the
use of septic tanks or
alternative wastewater
disposal systems where
sewers are not available
for the disposal of
wastewater?
N/A No No No N/A
f. Directly or indirectly
destroy a unique
paleontological resource
or site or unique geologic
feature?
EIR Pages 4.4-7
through 4.4-9
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.5, Geology, Soils, and Seismicity, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to geology and soils. The 2017 EIR found that implementation of the 2030 Comprehensive Plan would result in less than significant impacts associated with risk of loss, injury, or death involving rupture of a known earthquake fault, strong seismic ground shaking, seismic-related ground failure (including liquefaction), landslides, and expansive soils.

The 2017 EIR also found that implementation of the 2030 Comprehensive Plan would not result in development located on a geologic unit or on soil that is unstable, or that would become unstable as a result of the project and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction, or collapse. The 2030 Comprehensive Plan also determined that there would be less than significant impacts related to erosion or siltation.

PROJECT-SPECIFIC IMPACTS
a1. Would the project expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other substantial evidence of a known fault? The Alquist-Priolo Earthquake Fault Zone associated with the San Andreas Fault is located near the crest of the Santa Cruz Mountains and just east of the intersection of Page Mill Road and State Route 35. Similar to what was analyzed in the 2017 EIR, no housing inventory sites are located near the Alquist-Priolo Earthquake Fault Zone associated with the San Andreas Fault (City of Palo Alto 2016). The closest active fault is the San Andreas Fault, located approximately

2.5 miles from the southern portion of the city. As a result, the likelihood of surface rupture occurring from active faulting that would affect future development under the proposed HEU is remote. This impact would be less than significant and would be generally the same as the Item 9
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impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
a2. Would the project expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving strong seismic ground shaking? As with any site in the Bay Area region, development under the proposed HEU is susceptible to strong seismic ground shaking in the event of a major earthquake. Nearby faults include the San Andreas Fault, the Monte Vista Fault, the Hayward Fault and the Calaveras Fault. These faults are capable of producing strong seismic ground shaking in the city.

Although nothing can ensure that residences and infrastructure do not fail under seismic stress, proper engineering can minimize the risk to life and property. Accordingly, building standards have been developed for construction in areas subject to seismic ground-shaking. Development facilitated by the proposed HEU would be required to comply with standards established by PAMC Chapter 16.04 and 16.06, which adopt the California Building Code (CBC) and the California Residential Code, respectively. The requirements of the California Building Code ensure that new habitable structures are engineered to withstand the expected ground acceleration at a given location. Further, CBC Chapter 18 requires that actions recommended in a site-specific soil investigation are incorporated into the construction of each structure. Future development would also be required to comply with PAMC Section 16.28.150, which would require detailed engineering geology reports in areas of suspected geological hazards and implementation of recommendations and mitigations to reduce hazards from ground shaking or rupture. Additionally, the project would promote infill development, which may involve replacing older buildings subject to seismic damage with newer structures built to current seismic standards that could better withstand the adverse effects of strong ground shaking.

Although the proposed HEU would facilitate development of 919 more housing units compared to what was analyzed in the 2017 EIR, continued compliance with applicable provisions of the CBC and the PAMC would ensure that potential impacts from ground-shaking would be minimized. This impact would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
a3. Would the project expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving seismic-related ground failure, including liquefaction?
As shown in Map S-3 of the Safety Element of the 2030 Comprehensive Plan, the northern and eastern portion of the city lies within a high-liquefaction zone. Although the proposed HEU would facilitate some development in a high-liquefaction zone adjacent to US 101, future development would be required to comply with requirements of the CBC pursuant to PAMC Chapter 16.04, as well as requirements for soils engineering reports and engineering geology reports pursuant to PAMC Sections 16.28.140 and 16.28.150. Additionally, PAMC Section

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GEOLOGY AND SOILS
74 | Page Addendum to the 2030 Comprehensive Plan EIR
risk due to seismic activity hazards, including liquefaction, and requires the preparation of detailed geologic, soils, and engineering studies prior to development. Such reports typically include recommendations for project design and construction, such as site grading/soil preparation, and foundation design, as well as quantitative evaluations of liquefaction susceptibility. The final grading, drainage, and foundation plans are reviewed before construction to confirm incorporation of the report recommendations. Although the proposed HEU would facilitate development of 919 more housing units compared to what was analyzed in the 2017 EIR, continued compliance with all applicable provisions of the California Building Code and the PAMC would minimize impacts associated with liquefaction to a less than significant level and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. a4. Would the project expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving landslides? c. Would the project be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction, or collapse? Earthquakes can trigger landslides that may cause injuries and structural damage. Landslides are typically a hazard on or near slopes or hillside areas, rather than generally level areas where HEU housing development is anticipated. The 2017 EIR characterizes most of Palo Alto as having low topographic relief where the probability of landslides is very low, with the exception of hilly slopes west of Interstate 280. Similar to what was analyzed in the 2017 EIR, no development would be facilitated in landslide zones within the city. Furthermore, future development would be required to comply with PAMC Sections 16.28.140 and 16.28.150, which outline requirements for soils engineering reports and engineering geology reports, as well as PAMC Section 18.40.120, which imposes requirements in areas that have been identified as having moderate or high risk due to seismic activity hazards. Although the proposed HEU would facilitate development of 919 more housing units compared to what was analyzed in the 2017 EIR, continued compliance with all applicable provisions of the California Building Code and the PAMC would ensure that potential impacts from landslides would be minimized to a less than significant level and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. b. Would the project result in substantial soil erosion or the loss of topsoil? The proposed HEU would include infill development in non-vacant and underutilized sites in urbanized areas. Demolition and construction activities would be required to comply with CBC, Appendix Section J110, Erosion Control Standards, pursuant to Chapter 16.04 of the PAMC, which ensures appropriate erosion and stormwater pollution control during grading and construction activities.

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Construction activities that occur on more than one acre are required to obtain a National Pollutant Discharge Elimination System (NPDES) Construction General Permit. NPDES requires the development of a storm water pollution prevention plan (SWPPP), which includes BMPs to reduce erosion and topsoil loss from stormwater runoff. BMP examples generally include an effective combination of erosion and sediment controls, which include barriers such as silt fences, hay bales, drain inlet protection, or gravel bags.

Future development would also be required to comply with PAMC Chapter 16.28, which outlines requirements for grading and erosion and sediment control. Examples include preparation of an interim and a final erosion and sediment control and SWPPP, as well as soils engineering reports, which would prevent excessive erosion and runoff. Although the proposed HEU would facilitate development of 919 more housing units compared to what was analyzed in the 2017 EIR, continued compliance with all applicable federal, State, and local regulations and the PAMC would ensure that potential impacts from soil erosion would be minimized. This impact would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
d. Would the project be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), creating substantial direct or indirect risks to life or property? As discussed in the 2017 EIR, shrink-swell potential in the western and central parts of the city are generally lower than the northeastern parts, where clay-rich soils and “Bay Mud” sediments are widespread (City of Palo Alto 2016). The proposed HEU would facilitate some housing development in the northeastern part of the city, and therefore could potentially locate housing inventory sites on areas with expansive soils. However, future development would be required to comply with PAMC Sections 16.28.140 and 16.28.150, which outline requirements for soils engineering reports and engineering geology reports, as well as PAMC Section

18.40.120, which imposes requirements in areas that have been identified as having moderate or high risk due to seismic activity hazards. The CBC also includes requirements to address soil- related hazards. Typical measures to treat hazardous soil conditions involve removal of soil or fill materials, proper fill selection, and compaction. In cases where soil remediation is not feasible, the CBC requires structural reinforcement of foundations to resist the forces of expansive soils. This would ensure that the potential for projects to occur on expansive soils such that substantial direct or indirect risks to life or property to occur would be reduced.

Although the proposed HEU would facilitate development of 919 more housing units compared to buildout analyzed in the 2017 EIR, continued compliance with all applicable provisions of the California Building Code and the PAMC would ensure that potential impacts from soil erosion would be minimized. This impact would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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GEOLOGY AND SOILS
76 | Page Addendum to the 2030 Comprehensive Plan EIR e. Would the project have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of wastewater?
Palo Alto is served by the City’s established wastewater system. The proposed HEU would facilitate development on non-vacant and underutilized sites which are and would continue to be served by the City’s wastewater system. The project would not include the use of septic tanks or alternative wastewater disposal systems. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

f. Would the project directly or indirectly destroy a unique paleontological resource or site or unique geologic feature?
As discussed in the Geological Setting above, there are known paleontological resource sites within the city, and the presence of these sites indicates that there are likely undiscovered paleontological resources. Although the proposed HEU would facilitate development on non- vacant and already disturbed sites, similar to what was analyzed in the Comprehensive Plan EIR, development facilitated by the proposed HEU could still potentially impact a unique paleontological resource or site, or unique geologic feature. However, future development would be required to comply with applicable federal and State regulations that protect paleontological resources, as well as implement Mitigation Measure CULT-5 which would reduce impacts on paleontological resources to a less than significant level. Therefore, this impact would be less than significant with mitigation, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would be required to comply with federal, State, and local regulations pertaining to geological resources which would reduce impacts to a less than significant level. Future development would also be required to comply with applicable federal and State regulations that protect paleontological resources, as well as implement Mitigation Measure CULT-5 which would reduce impacts on paleontological resources to a less than significant level. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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8 Greenhouse Gas Emissions

Where was
Impact Analyzed
in the EIR?
Could Proposed
Changes
Involve New or
Substantially
More Severe
Impacts?
Do New
Circumstances
Result in New
or Substantially
More Severe
Impacts?
Does New
Information
Result in New
or Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address
and/or
Resolve
Impacts?
Would the project:
a. Generate greenhouse
gas emissions, either
directly or indirectly,
that may have a
significant impact on
the environment?
EIR Pages 4.6-10
through 4.6-16
No No No N/A
b. Conflict with any
applicable plan, policy,
or regulation adopted
for the purposes of
reducing the emissions
of greenhouse gases?
EIR Pages 4.6-16
through 4.6-21
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.6, Greenhouse Gas Emissions and Climate Change, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to greenhouse gas emissions. The 2017 EIR concluded that the 2030 Comprehensive Plan would not directly or indirectly generate GHG emissions that may have a significant impact on the environment since Scenario 6 would result in a decrease in emissions from existing conditions and would achieve the 2030 performance criteria that would ensure the City is on a trajectory to achieve the GHG reductions targets of SB 32 for year 2030.

Additionally, the 2030 Comprehensive Plan would not conflict with CARB’s Scoping Plan or Association of Bay Area Governments (ABAG)/Metropolitan Transportation Commission’s (MTC) Plan Bay Area. However, the 2017 EIR found that the 2030 Comprehensive Plan would expose people or structures to the physical effects of climate change, including but not limited to flooding, extreme temperatures, public health, wildfire risk, or other impacts resulting from climate change, and mitigation measure GHG-3 would be required to reduce impacts to a less than significant level.

Table 16 lists the mitigation measures from the 2017 EIR related to greenhouse gas emissions.

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78 | Page Addendum to the 2030 Comprehensive Plan EIR Table 16 2017 EIR Mitigation Measures: Greenhouse Gas Emissions Mitigation
Measure # Mitigation Text
Impact GHG-3: The proposed Plan would expose people or structures to the physical effects of climate change, including but not limited to flooding, extreme temperatures, public health, wildfire risk, or other impacts resulting from climate change, requiring mitigation. (Significant and Mitigable) GHG-3 To address the potential impacts associated with exposing additional people or structures to the effects of climate change, the proposed Plan shall include policies that address the following topics:
 Flooding risks caused by climate change-related changes to precipitation patterns, groundwater levels, sea level rise, tides, and storm surges.
 Cooperative planning with federal, State, regional, and local public agencies on issues related to climate change (including sea level rise and extreme storms).  Preparation of response strategies to address sea level rise, increased flooding, landslides, soil erosion, storm events, and other events related to climate change.  Impacts of sea level rise on Palo Alto’s levee system.

Source: City of Palo Alto 2016

THRESHOLDS
In response to climate change, California implemented AB 32, the “California Global Warming Solutions Act of 2006.” AB 32 requires the reduction of statewide GHG emissions to 1990 emissions levels (essentially a 15 percent reduction below 2005 emission levels) by 2020 and the adoption of rules and regulations to achieve the maximum technologically feasible and cost-effective GHG emissions reductions. On September 8, 2016, the Governor signed SB 32 into law, extending AB 32 by requiring the State to further reduce GHG emissions to 40 percent below 1990 levels by 2030 (the other provisions of AB 32 remain unchanged). On September 10, 2018, the Governor signed Executive Order (EO) B-55-18, which identifies a new goal of carbon neutrality by 2045 and supersedes the goal established by EO S-3-05. 6 CARB adopted
the 2022 Scoping Plan on November 16, 2022, which provides a framework for achieving carbon neutrality by 2045 or earlier. The 2022 Scoping Plan extends and expands upon the three earlier versions of scoping plans with a target of reducing anthropogenic emissions to 85 percent below 1990 levels by 2045.

According to the CEQA Guidelines, projects can tier from a qualified GHG reduction plan, which allows for project-level evaluation of GHG emissions through the comparison of the project’s consistency with the GHG reduction policies included in a qualified GHG reduction plan. This approach is considered by the Association of Environmental Professionals (AEP) in their white paper, Beyond Newhall and 2020, to be the most defensible approach presently available under CEQA to determine the significance of a project’s GHG emissions (AEP 2016). Palo Alto does not currently have a qualified GHG reduction plan and thus this approach is not currently feasible.

6 Executive Order (EO) S-3-05, signed by Governor Arnold Schwarzenegger in 2005, proclaims that California is vulnerable to the impacts of climate change. It declares that increased temperatures could reduce the Sierra Nevada snowpack, further exacerbate California’s air quality problems, and potentially cause a rise in sea levels. To combat those concerns, the EO established total GHG emission targets for the state. Specifically, emissions are to be reduced to the 2000 level by 2010, the 1990 level by 2020, and to 80 percent below the 1990 level by 2050.

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To evaluate whether a project may generate a quantity of GHG emissions that may have a significant impact on the environment, state agencies have developed a number of operational bright-line significance thresholds. Significance thresholds are numeric mass emissions thresholds that identify the level at which additional analysis of project GHG emissions is necessary. Projects that attain the significance target, with or without mitigation, would result in less than significant GHG emissions. Since the proposed project would tier from the 2017 EIR, the BAAQMD GHG 2030 efficiency target applied in the 2017 EIR would be used to inform the threshold for this analysis. However, to take into account the new State goal of carbon neutrality by 2045 and the project buildout year of 2031, the BAAQMD GHG 2030 efficiency target was interpolated to get an adjusted 2031 threshold of 3.74 MTCO 2e per service
population per year.
7 Therefore, the proposed project’s GHG emissions would be significant if they would exceed the 2031 interpolated threshold of 3.74 MTCO2e per service population per year, consistent with EO B-55-18.

PALO ALTO SUSTAINABILITY AND CLIMATE ACTION PLAN
The City of Palo Alto launched its S/CAP in August 2014. In 2020, the city launched an update to the S/CAP to develop strategies needed to meet their goal of reducing GHG emissions 80 percent below 1990 levels by 2030 (the “80 x 30” goal). In October 2022, the Palo Alto City Council approved the updated S/CAP Goals and Key Actions that will serve as the City's roadmap to meeting the "80 x 30" goal and most recent Carbon Neutral by 2030 goal. The S/CAP Goals and Key Actions includes goals and actions in seven areas: Energy, Mobility, Electric Vehicles, Water, Climate Adaptation and Sea Level Rise, Natural Environment, and Zero Waste. The S/CAP is not a qualified CAP under CEQA Guidelines 15183.5(b)(1) since it has not yet been adopted in a public process following environmental review.

METHODOLOGY

OPERATIONAL EMISSIONS
Long-term emissions relate to area sources, energy use, solid waste, water use, and transportation. Operational emissions for the proposed HEU were modeled using the California Emissions Estimator Model (CalEEMod) version 2022.1 and compared to the adjusted BAAQMD efficiency thresholds used in the 2017 EIR. CalEEMod default settings were used to estimate emissions associated with the proposed project to apply a high-level and conservative analysis.

REA SOURCE EMISSIONS
Emissions associated with area sources, including consumer products, landscape maintenance, and architectural coating were calculated in CalEEMod and utilized default standard emission rates from CARB, U.S. EPA, and emission factor values provided by the local air district (CAPCOA 2017). Architectural coatings were calculated pursuant to BAAQMD Regulation 8 Rule 3.

7 4.0 MTCO2e (2030 Comprehensive Plan EIR threshold) / 15 years (2030 to 2045 for carbon neutrality) = 0.26 MTCO2e. To find the 2031 interpolated threshold, 4.0 MTCO2e - 0.26 MTCO2e = 3.74 MTCO2e.

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ENERGY USE EMISSIONS
CalEEMod provides operational emissions of CO2, N2O, and CH4. Emissions from energy use include electricity and natural gas use. The emissions factors for natural gas combustion are based on EPA’s AP-42 (Compilation of Air Pollutant Emissions Factors) and CCAR. Electricity emissions are calculated by multiplying the energy use times the carbon intensity of the utility district per kilowatt hour (CAPCOA 2017). Since the City’s All-Electric Ordinance requires all- electric construction for future residential uses, it was assumed that the natural gas demand estimated for the project would instead be supplied by electricity to account for increased electricity usage. Total annual consumption for natural gas (kBTU/year) was converted to electricity (kWh/year) and added to the total annual consumption for electricity. CalEEMod incorporates 2019 Title 24 CALGreen Building Standards.

OLID WASTE EMISSIONS
Emissions from solid waste generation were also calculated in CalEEMod and are based on the IPCC’s methods for quantifying GHG emissions from solid waste using the degradable organic content of waste (CAPCOA 2017). Waste disposal rates by land use and overall composition of municipal solid waste in California was primarily based on data provided by the California Department of Resources Recycling and Recovery [CalRecycle] 2019).

ATER AND WASTEWATER USE EMISSIONS
Emissions from water and wastewater usage calculated in CalEEMod were based on the default electricity intensity from the California Energy Commission’s 2006 Refining Estimates of Water- Related Energy Use in California using the average values for Northern and Southern California.

The Palo Alto RWQCP was assumed to be 100 percent aerobic since it does not contain facultative lagoons or septic tanks.

OBILE SOURCE EMISSIONS
For mobile sources, CO2, CH4, and N2O emissions were quantified in CalEEMod.

REFRIGERANT EMISSIONS
Refrigerants are substances used in equipment for cooling and heating purposes and are mostly comprised of hydrofluorocarbons (HFC). HFCs are potent GHGs that have high global warming potential (GWP) values. CalEEMod calculates refrigerant emissions according to equipment charge sizes and leak rates that have been determined for relevant land uses and equipment types.

ONSTRUCTION EMISSIONS
Construction of the proposed HEU would generate temporary GHG emissions primarily due to the operation of construction equipment and truck trips. Site preparation and grading typically generate the greatest amount of emissions due to the use of grading equipment and soil hauling. Although construction activity is addressed in this analysis, CAPCOA does not discuss whether any of the suggested threshold approaches adequately address impacts from Item 9
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temporary construction activity. As stated in the CEQA and Climate Change white paper, “more study is needed to make this assessment or to develop separate thresholds for construction activity” (CAPCOA 2008). Additionally, the BAAQMD does not have specific quantitative thresholds for construction activity. Therefore, although estimated in CalEEMod and provided for informational purposes, construction activity is not included in the total emissions calculations.

PROJECT-SPECIFIC IMPACTS
a. Would the project generate GHG emissions, either directly or indirectly, that may have a significant impact on the environment?
Proposed construction activities, energy use, daily operational activities, and mobile sources (traffic) associated with the proposed project would generate GHG emissions. CalEEMod was used to calculate emissions resulting from construction and long-term operation (see Appendix B for model output).

CONSTRUCTION EMISSIONS
Emissions generated from construction of full buildout under the proposed HEU are estimated to be 1,047 MT of CO2e per year.
8 However, as the BAAQMD does not have a recommended
threshold for construction-related GHG emissions, emissions associated with construction are not included in Table 17 and compared to BAAQMD significance thresholds.

OPERATIONAL INDIRECT AND STATIONARY DIRECT EMISSIONS
Long-term emissions relate to area sources, energy use, solid waste, water use, and transportation. Each of the operational sources of emissions is discussed further below.

MOBILE EMISSIONS
As shown in Table 17 below, the additional 919 units facilitated by the proposed project would generate approximately 4,036 MTCO2e per year.

AREA SOURCE EMISSIONS
CalEEMod was used to calculate direct sources of air emissions associated with the proposed project. These include consumer product use and landscape maintenance equipment. Area emissions are estimated at 47 MTCO
2e per year.

ENERGY USE EMISSIONS
Operation of the proposed project would consume both electricity and natural gas. The generation of electricity through combustion of fossil fuels emits CO2, and to a smaller extent, N2O and CH4. As discussed under the Methodology section, pursuant to the City’s All-Electric

8 Construction emissions were determined assuming the 919 units were built as one continuous project using CalEEMod defaults. Construction emissions for future projects would be based on the timing and size of individual projects.

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82 | Page Addendum to the 2030 Comprehensive Plan EIR Ordinance, natural gas was converted to electricity to account for increased electricity usage.

Since CPAU provides electricity to the city, and has supplied 100 percent carbon neutral electricity since 2013, GHG emissions from energy use are estimated at 0 MTCO2e per year.

WATER USE EMISSIONS
Based on the amount of electricity generated to supply and convey water for the project, the proposed project would generate an estimated 26 MTCO
2e per year.

SOLID WASTE EMISSIONS
Based on the estimate of GHG emissions from project-generated solid waste as it decomposes, solid waste associated with the proposed project would generate approximately 178 MTCO2e per year.

REFRIGERANT EMISSIONS
Based on the estimate of GHG emissions from refrigerants used for the project, the proposed project would generate an estimated 1 MTCO2e per year.

The annual emissions associated with the additional development under the proposed HEU would total approximately 4,288 MTCO2e per year. As discussed in Section 14, Population and Housing, the service population from the project would be 2,307 new residents. Therefore, the MTCO2e per service population for the proposed HEU would be 1.9. These emissions would not exceed the 2017 EIR’s BAAQMD 2030 efficiency target of 3.74. Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

Table 17 Operational GHG Emissions
Emissions Source Annual Emissions (MT of CO2e/year)
Mobile 4,036
Area 47
Energy 0
Water 26
Waste 178
Refrigerants 1
Total 4,288
Service Population 2,307
MTCO2e/Service Population 1.9
2017 EIR BAAQMD 2030 Efficiency Target (Adjusted for SB 32) 3.74 Exceeds Threshold? No
See Table 2.5 “Operations Emissions by Sector, Unmitigated” emissions. CalEEMod worksheets in Appendix B.

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b. Would the project conflict with any applicable plan, policy, or regulation adopted for the purpose of reducing the emissions of greenhouse gases?
The City of Palo Alto has adopted the Sustainability and Climate Action Plan (S/CAP) in June 2023 to develop strategies to meet their goal of reducing GHG emissions 80 percent below 1990 levels by 2030. The California Air Resources Board (CARB) also updated its Climate Change Scoping Plan in November 2022. Table 18 shows the proposed project’s compliance with the City’s S/CAP and CARB Scoping Plan measures.

Table 18 Proposed Project Compliance with Applicable S/CAP Actions GHG Reduction Goal or Policy Project Consistency
City of Palo Alto S/CAP
Action C3: Complete study to identify any additional Energy, EV, or Mobility key actions needed to achieve 80% reduction in greenhouse gas emissions from 1990 levels by 2030, such as electrification of additional multifamily or commercial end uses, greater electrification of vehicles, or other emissions reduction actions not already identified in this Plan.

Consistent. Development facilitated by the project would be required to comply with the PAMC Chapter 16.17, which
mandates the implementation of Title 24. Compliance would include complying with the most updated rooftop solar
requirements at the time of construction. Future
development would also be required to comply with the
City’s most updated Reach Code and All-Electric Mandate which requires all-electric building design for single-family, low-rise multi-family, and non-residential development (City of Palo Alto 2022a). Electricity would be provided by CPAU, which has provided 100 percent carbon neutral electricity since 2013 (City of Palo Alto 2022b).

Pursuant to Section 16.14.420 of the PAMC, new multi-
family residences would be required to provide at least one EVSE Ready outlet or EVSE installed for each residential unit in the structure for residential parking, and would be
required to provide Conduit Only, EVSE Ready Outlet, or EVSE installed for at least 25 percent of guest parking spaces, among which at least 5 percent shall be EVSE
installed. Future development facilitated by the project would be required to comply with the most updated EV
requirements in both the City’s Reach Code and Title 24 at the time of construction.

Action E1: Reduce all or nearly all greenhouse gas emissions in single-family appliances and equipment, including water heating, space heating, cooking, clothes drying, and other appliances that use natural gas.

Consistent. Future development would be required to
comply with the City’s most updated Reach Code and All- Electric Mandate which requires all-electric building design for single-family, low-rise multi-family, and non-residential development (City of Palo Alto 2022a).

Action E7: Use codes and ordinances - such as the energy reach code, green building ordinance, zoning code, or other mandates - to facilitate electrification in both existing buildings and new construction projects where feasible.

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84 | Page Addendum to the 2030 Comprehensive Plan EIR GHG Reduction Goal or Policy Project Consistency
Action EV6: Expand access to on-site EV charging for multi- family residents.

Consistent. Pursuant to Section 16.14.420 of the PAMC, new multi-family residences would be required to provide at least one EVSE Ready outlet or EVSE installed for each
residential unit in the structure for residential parking, and would be required to provide Conduit Only, EVSE Ready
Outlet, or EVSE installed for at least 25 percent of guest parking spaces, among which at least 5 percent shall be EVSE installed. Future development facilitated by the project would be required to comply with the most updated EV
requirements in both the City’s Reach Code and Title 24 at the time of construction.

Action M7: Continue to implement the City’s Housing
Element of the Comprehensive Plan to improve jobs -
housing balance and reduce vehicle miles traveled (VMT).

Consistent. The proposed project would implement the
2023-2031 Housing Element Update which would facilitate development within the city’s urbanized and underutilized sites. These areas are near or adjacent to transportation corridors currently served by transit or Class I, II, and III bicycle lanes such as University Avenue, Bryant Street, California Avenue, and Bayshore Road, which would
encourage the use of bicycles and reduce reliance on single- occupancy vehicles and VMT.

Action N2: Ensure No Net Tree Canopy Loss for all projects. Consistent. Future development would be required to comply with the City’s Tree Ordinance pursuant to Title 8 of the PAMC, which also ensures no net loss of canopy across all tree removal types.

Action N8: Expand the requirements of the Water Efficient Landscape Ordinance (WELO) to increase native and
drought-tolerant species composition.

Consistent. Future development would be required to
comply with the most updated requirements of WELO
pursuant to Section 12.32.040 of the PAMC.

Action N9: Phase out gas-powered lawn and garden
equipment, in compliance with California’s AB 1346.

Consistent. Future development would be required to
comply with AB 1346 and would be prohibited from using
gas-powered lawn and garden equipment.

Action ZW2: Promote residential food waste reduction. Consistent: Future development facilitated by the proposed HEU would be required to comply with SB 1383 and recycle organic wastes.

CARB Scoping Plan Measures
Consider enhanced energy efficiency (high efficiency air conditioners, light-emitting diode lamps, efficiency
improvements in industrial process cooling and
refrigeration, efficient street lighting).

Consistent. Future development would be required to
comply with the latest CALGreen standards and Building
Energy Efficiency Standards, which would require
implementation of energy-efficient light fixtures and
building materials into the project design, and would ensure energy efficient performance for new buildings.

Source: City of Palo Alto 2023a, CARB 2017
As shown in Table 18, the project would be consistent with applicable actions from the City’s S/CAP. Therefore, impacts would be less than significant, and would be generally the same as for the 2030 Comprehensive Plan as analyzed in the 2017 EIR. There would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, and further analysis is not warranted.

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PROJECT CONSISTENCY WITH 2022 SCOPING PLAN
The principal State plans and policies for reducing GHG emissions are AB 32, SB 32, and AB 1279. The quantitative goal of AB 32 is to reduce GHG emissions to 1990 levels by 2020; the goal of SB 32 is to reduce GHG emissions to 40 percent below 1990 levels by 2030; and the goal of AB 1279 is to achieve net zero greenhouse gas emissions no later than 2045, and reduce GHG emissions by 85 percent below 1990 levels no later than 2045. The 2022 Scoping Plan expands upon earlier plans to include the AB 1279 targets. The 2022 Scoping Plan’s strategies that are applicable to the proposed project include reducing fossil fuel use and vehicle miles traveled; decarbonizing the electricity sector, maximizing recycling and diversion from landfills; and increasing water conservation. The project would be consistent with these goals since future development would be required to comply with the latest Title 24 Green Building Code and Building Efficiency Energy Standards, as well as the AB 341 waste diversion goal of 75 percent and recycle organic wastes pursuant to SB 1383. Future development facilitated by the project would also be largely located in areas served by transit, such as along El Camino Real, the California Avenue area, and the Downtown area, and would be near or adjacent to transportation corridors currently served by transit or Class I, II, and III bicycle lanes such as University Avenue, Bryant Street, California Avenue, and Bayshore Road. This would reduce reliance on single-occupancy vehicles and VMT and promote bicycling and walking. Future development would also be required to comply with the City’s most updated Reach Code and All-Electric Mandate which requires all-electric building design for single-family, low-rise multi- family, and non-residential development (City of Palo Alto 2022a). Additionally, future development would receive electricity from CPAU, which sources 100 percent GHG free electricity. Therefore, the project would not conflict with the 2022 Scoping Plan and this impact would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not result in emissions exceeding the 2031 interpolated thresholds, and would be consistent with the City’s S/CAP and CARB Scoping Plan measures, resulting in less than significant GHG impacts. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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9 Hazards and Hazardous Materials

4.7-2
through

4.7-3
No No No N/A
b. 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?
EIR Pages

4.7-3
through

4.7-5
No No No Yes
c. Emit hazardous emissions or
handle hazardous or acutely
hazardous materials, substances,
or waste within 0.25 mile of an
existing or proposed school?
EIR Pages

4.7-5
through

4.7-6
No No No Yes
d. Be located on a site that is
included on a list of hazardous
material 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?
EIR Pages

4.7-6
through

4.7-8
No No No N/A
e. 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, would the project result
in a safety hazard or excessive
noise for people residing or
working in the project area?
EIR Pages

4.7-9
through

4.7-10;

4.7-11
No No No N/A
f. Impair implementation of or
physically interfere with an
adopted emergency response
plan or emergency evacuation
plan?
EIR Pages

4.7-10
through

4.7-11
No No No N/A
g. Expose people or structures,
either directly or indirectly, to a
significant risk of loss, injury, or
death involving wildland fires?
EIR Pages

4.7-8
through

4.7-9
No No No N/A
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ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.7, Hazards and Hazardous Materials, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to hazards and hazardous materials. The 2017 EIR found that the 2030 Comprehensive Plan would not create a significant hazard to the public or environment as a result of the routine transport, use, or disposal of hazardous materials, and would not involve the release of hazardous materials into the environment through upset and accident conditions. The 2017 EIR concluded that with compliance with applicable federal, State, and local regulations regarding the storage, use, and handling of hazardous materials, the 2030 Comprehensive Plan would not result in hazardous emissions or the handling of hazardous wastes within 0.25 mile of an existing or proposed school, and would not expose future occupants to contaminated soil and groundwater. The 2017 EIR also found that the 2030 Comprehensive Plan would not impair implementation or interfere with an adopted emergency response or evacuation plan, or result in a safety hazard from a public airport or private airstrip for people residing or working within the plan area.

PROJECT-SPECIFIC IMPACTS
a. Would the project create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials? The proposed HEU would include 919 more housing units compared to buildout assumed in the 2017 EIR and therefore would potentially transport, use, or dispose of more hazardous materials than what was analyzed. However, hazardous materials would be required to be transported under the United States Department of Transportation (DOT) regulations. Future development facilitated by the proposed HEU would be subject to regulatory programs such as those overseen by the RWQCB and the Department of Toxic Substances Control (DTSC). These agencies require applicants for development of potentially contaminated properties to perform investigation and cleanup if the site is found to be contaminated with hazardous substances. In addition, Santa Clara County has substantial regulations concerning hazardous materials under its Certified Unified Program Agencies (CUPA) jurisdiction and related Unified Programs. This is further enforced by Palo Alto Fire Department Programs.

The proposed HEU is intended to expand housing capacity and would not facilitate the establishment of uses that would sell, use, store, transport, or release substantial quantities of hazardous materials such as industrial, warehouse, auto-service, or manufacturing uses.

Residential uses do not typically use hazardous materials other than small amounts for cleaning and landscaping. These materials would not be different from household chemicals and solvents already in wide use throughout Palo Alto. Residents are anticipated to use limited quantities of products routinely for periodic cleaning, repair, and maintenance or for landscape maintenance/pest control that could contain hazardous materials. Those using such products would be required to comply with all applicable regulations regarding the disposal of household waste.

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Compliance with all applicable federal, State, and local regulations would reduce impacts from the routine transport, use, or disposal of hazardous materials to a less than significant level.

Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
b. Would the project 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?
Development under the proposed HEU would facilitate development on sites that are possibly contaminated and inactive, undergoing evaluation, and/or undergoing corrective action, and grading or excavation may result in the transport, disposal, and release of hazardous materials if they are unearthed and removed from the site. However, the amount and type of soil disturbance would be similar to what was analyzed under the 2017 EIR as development would be facilitated on previously disturbed soils, and future development under the project would be subject to regulatory programs such as those overseen by the RWQCB and the DTSC. These agencies require applicants for development of potentially contaminated properties to perform investigation and cleanup if the properties are contaminated with hazardous substances above the applicable environmental screening levels for the site. Future development would also be required to comply with Chapter 17.16 of the PAMC which requires the preparation of a hazardous materials management plan (HMMP) demonstrating the suitable storage of hazardous materials, as well as Chapter 16.11 which requires the implementation of a SWPPP and stormwater pollution prevention measures. Although the proposed HEU would include 919 more housing units compared to buildout assumed in the 2017 EIR, compliance with all applicable federal, State, and local regulations would reduce impacts from the release of hazardous materials to a less than significant level. Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. c. Would the project emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within 0.25 mile of an existing or proposed school? Several housing inventory sites are located within 0.25 mile of a school, such as Palo Verde Elementary School, Fairmeadow Elementary School, Herbert Hoover Elementary School, and Palo Alto High School. The proposed HEU would not involve new industrial or manufacturing uses, or involve the use, storage, disposal, or transportation of significant quantities of hazardous materials. The proposed project is designed to facilitate residential development.

Residential uses may involve use and storage of some materials considered hazardous, though primarily these would be limited to solvents, paints, chemicals used for cleaning and building maintenance, and landscaping supplies. These materials would not be different from household chemicals and solvents already in general and wide use throughout the city. Development accommodated under the project therefore would not pose a health risk to nearby schools or Item 9
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90 | Page Addendum to the 2030 Comprehensive Plan EIR childcare facilities. Additionally, as discussed above under Impacts (a) and (b), future development would be required to comply with existing applicable federal, State, and local regulations which govern the routine use, transport, handling, storage, disposal, and release of hazardous materials. Oversight by the appropriate federal, State, and local agencies and compliance by new development with applicable regulations related to the handling and storage of hazardous materials would minimize the risk of the public’s potential exposure to these substances to a less than significant level. Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. d. Would the project be located on a site that is included on a list of hazardous material 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?
As discussed in the 2017 EIR, a number of hazardous materials sites are listed on databases compiled pursuant to Government Code Section 65962.5. Most of the sites are listed as closed and have been remediated to the satisfaction of the lead responsible agency (i.e., RWQCB, DTSC, Santa Clara County Department of Environmental Health (SCCDEH)) based on land use at the time of closure. Additionally, several groundwater contaminant plumes underlie certain areas of the city, which could potentially expose future residents to contamination of soil and groundwater. The proposed HEU would facilitate 919 more housing units compared to buildout analyzed in the 2017 EIR, and therefore could potentially facilitate more development on sites containing hazardous materials in underlying groundwater or soils. However, the amount and type of soil disturbance would be similar to what was analyzed under the 2017 EIR as development would be facilitated on previously disturbed soils and on underutilized and non- vacant sites. Future development would be required to adhere to all applicable federal, State, and local regulations regarding cleanup and reuse of a site with hazardous materials, as well as policies within the Safety Element of the 2030 Comprehensive Plan, which would reduce impacts to a less than significant level. Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. e. 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, would the project result in a safety hazard or excessive noise for people residing or working in the project area? As discussed in the 2017 EIR, the Comprehensive Land Use Plan (CLUP) for the Palo Alto Airport was adopted in November 2008 by the Santa Clara County Airport Land Use Commission (ALUC) and the city amended the Comprehensive Plan in 2009 to incorporate the CLUP (Santa Clara County Airport Land Use Commission 2016). The CLUP includes policies intended to safeguard the general welfare of the inhabitants within the vicinity of the airport and ensure that new surrounding uses do not affect the airport’s continued safe operation (City of Palo Alto 2017a).

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zone south of US 101. This area is within the Palo Alto Airport’s Airport Influence Area (AIA); however, this area is not located in the airport’s inner or outer safety zone and is outside of the aircraft noise contours. Future development in the height restricted areas surrounding the airport would be subject to Federal Aviation Regulations (FAR) Part 77, Objects Affecting Navigable Airspace, which establishes imaginary surfaces for airports and runways as a means to identify objects that are obstructions to air navigation. Any penetrations of the FAR Part 77 surface are subject to review on a case-by-case basis. If a safety problem is found to exist, the Federal Aviation Administration (FAA) may issue a determination of a hazard to air navigation (Santa Clara County Airport Land Use Commission 2016). The City of Palo Alto establishes and enforces height restrictions in these areas.

Therefore, with compliance with existing regulations, the proposed HEU would not interfere with an airport land use plan or create an airport-related safety hazard, and impacts would be less than significant. This impact would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
f. Would the project impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan?
As discussed in the 2017 EIR, the Palo Alto Office of Emergency Services (OES) is responsible for coordinating agency response to disaster or other large-scale emergencies in Palo Alto with assistance from the Santa Clara County Operational Area in accordance with the State of California Standardized Emergency Management System. The Palo Alto Emergency Operations Plan (EOP) establishes policy direction for emergency planning, mitigation, response, and recovery activities within the city. The Palo Alto EOP addresses interagency coordination, procedures to maintain communication with County and State emergency response teams, and methods to assess the extent of damage and management of volunteers. With participation from the City of Palo Alto and other local agencies, ABAG created an umbrella Hazard Mitigation Plan entitled “Taming Natural Disasters.” In addition, the city participated in development of and has since adopted the Regional Catastrophic Earthquake Mass Transportation Plan, which is an annex to the San Francisco Bay Area Regional Emergency Coordination Plan and addresses mass transportation/evacuation issues in response to a major earthquake (City of Palo Alto 2017a). As discussed in Section 4.13, Public Services and Recreation, future development in Palo Alto would be required to conform to the latest fire code requirements, including provisions for emergency access. With adherence to existing Comprehensive Plan policies and other regulations, implementation of the proposed HEU would not impair or interfere with an emergency response or evacuation plan. Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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HAZARDS AND HAZARDOUS MATERIALS
92 | Page Addendum to the 2030 Comprehensive Plan EIR g. Would the project expose people or structures, either directly or indirectly, to a significant risk of loss, injury, or death involving wildland fires? As shown in Map S-8 of the 2017 EIR, much of the area surrounding Palo Alto west of I-280 is considered to have a moderate and high risk of wildland fire, whereas all of the urbanized areas do not have any wildland fire hazards. Since the proposed HEU would facilitate development in non-vacant and underutilized sites in urbanized areas, wildfire risk to future residents would be low. Future development would be subject to the CAL FIRE Strategic Plan and the California Fire Code (CFC), pursuant to Chapter 15.04 of the PAMC. The CFC requires the clearance of debris and vegetation within a prescribed distance from structures in wildlife hazard areas.

Additionally, future development would be located in proximity to Palo Alto Fire Stations 1, 2, 3, and 4. Cooperative fire service agreements with the Central County Fire Department (CCFD), City of Menlo Park, City of Mountain View, Woodside Fire Protection District, and Stanford University would further assist the city in protecting people and structures from potential wildland fires. Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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10 Hydrology and Water Quality

4.8-11
through

4.8-13
No No No Yes
b. Substantially decrease
groundwater supplies or
interfere substantially with
groundwater recharge such
that the project may impede
sustainable groundwater
management of the basin?
EIR Page

4.8-13
through

4.8-16; 4.8-
20 through

4.8-22
No No No N/A
c. 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:

(i) Result in substantial
erosion or siltation on- or
off-site;
EIR Pages

4.8-16
through

4.8-17
No No No Yes
(ii) Substantially increase the
rate or amount of surface
runoff in a manner which
would result in flooding on-
or off-site;
EIR Pages

4.8-19
through

4.8-20
No No No Yes
(iii) 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
EIR Pages

4.8-19
through

4.8-20
No No No Yes
(iv) Impede or redirect flood
flows?
EIR Pages

4.8-22
through

4.8-23
No No No Yes
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HYDROLOGY AND WATER QUALITY
94 | Page Addendum to the 2030 Comprehensive Plan EIR

4.8-23
through

4.8-26
No No No N/A
e. Conflict with or obstruct
implementation of a water
quality control plan or
sustainable groundwater
management plan?
N/A No No No Yes

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.8 of the 2017 EIR analyzes impacts to hydrology and water quality. The 2017 EIR determined that the 2030 Comprehensive Plan could substantially degrade or deplete groundwater resources or interfere substantially with groundwater recharge since there is a potential for localized lowering of the shallow aquifer during construction dewatering activities.

However, implementation of mitigation measure HYD-2 would reduce impacts to a less than significant level. The 2017 EIR found that the 2030 Comprehensive Plan would not violate any water quality standards or waste discharge requirements with compliance with the NPDES General Construction Permit (GCP), SWPPP requiring incorporation of BMPs, and Low Impact Development (LID) treatment measures. The 2017 EIR also states that the 2030 Comprehensive Plan would not increase the rate of stormwater runoff or alter the existing drainage pattern; result in stream bank instability; result in new or increased flooding on-or off-site or exceed the capacity of stormwater drainage systems in local streams; or provide substantial additional sources of pollutants associated with urban runoff or otherwise substantially degrade surface or ground water quality. The 2017 EIR determined that the 2030 Comprehensive Plan would not substantially impede or redirect flood flows through placement of structures within the 100-year flood hazard area with compliance with the National Flood Insurance Program (NFIP) and Flood Hazard Regulations in the PAMC. Additionally, the 2030 Comprehensive Plan would not expose people or structures to a significant risk or loss, injury or death involving flooding by placing housing or other development within a 100-year flood hazard area or a levee or dam failure inundation area and would not result in impacts from inundation by seiche, tsunami, or mudflow.

Table 19 lists the mitigation measures from the 2017 EIR related to Hydrology and Water Quality.

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Table 19 2017 EIR Mitigation Measures: Hydrology and Water Quality Mitigation
Measure # Mitigation Text
Impact HYD-2: The proposed Plan could substantially degrade or deplete ground water resources or interfere substantially with groundwater recharge such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level. (Significant and Mitigable)
HYD-2 To reduce potential impacts associated with construction dewatering the proposed Plan shall include policies that address the following topics:
 Impacts of basement construction for single-family homes on adjacent properties, public resources, and the natural environment.
 Conservation of subsurface water resources.
 Reduced residential basement dewatering and other excavation activities.  Construction techniques and recharge strategies to reduce subsurface and surface water impacts.  Monitoring of dewatering and excavation projects.
 Cooperation with other jurisdictions and regional agencies to protect groundwater.  Protection of groundwater from the adverse impacts of urban use.

Source: City of Palo Alto 2016

PROJECT-SPECIFIC IMPACTS
a. Would the project violate any water quality standards or waste discharge requirements? Similar to what was assumed in the 2017 EIR, although development under the proposed HEU would occur on non-vacant and underutilized sites in previously disturbed areas, ground- disturbing activities would still have the potential to cause soil erosion from exposed soil, an accidental release of hazardous materials used for equipment such as vehicle fuels and lubricant, or temporary siltation from storm water runoff. If uncontrolled during construction, soil erosion and water pollutants could have adverse offsite effects on water quality. However, future development that would disturb one or more acre of land would be required to comply with the NPDES GCP as well as prepare a SWPPP that requires the incorporation of BMPs to control sedimentation, erosion, and hazardous materials contamination of runoff during construction. Additionally, projects that apply for a grading permit must also comply with the City of Palo Alto’s grading and erosion and sediment control requirements pursuant to PAMC Chapter 16.28, which require project applicants to submit an erosion and sediment control plan for review by the City prior to the issuance of grading permits. Pursuant to Chapter 16.11 of the PAMC, permanent stormwater pollution prevention measures must also be incorporated into future projects. These may include but are not limited to minimization of impervious surfaces; construction of sidewalks, walkways, and/or patios with permeable surfaces; and minimization of disturbances to natural drainages. Furthermore, all new and redevelopment projects that create or replace 10,000 square feet or more of impervious surface must incorporate site design, source control, and Low Impact Development (LID) treatment measures to the maximum extent practicable. Also, all development or redevelopment projects that create or replace one acre or more of impervious surface and are located in a hydromodification area must implement hydromodification management measures (i.e., post-project runoff rates shall not exceed estimated pre-project rates and durations) (City of Palo Alto 2017a).

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HYDROLOGY AND WATER QUALITY
96 | Page Addendum to the 2030 Comprehensive Plan EIR If groundwater is encountered, future development would be required to comply with the City’s Construction Dewatering System Policy and Plan Preparation Guidelines, which require excavation activities that may encounter groundwater to submit a Construction Dewatering Plan to the City’s Public Works Department (City of Palo Alto 2020). The Public Works Department would review and permit the dewatering plan prior to commencement of dewatering as part of the Street Work Permit process. The Construction Dewatering Plan must comply with the City’s Guidelines that require that water be tested for contaminants prior to initial discharge and at intervals during dewatering. In the dewatering plan, the applicant must include provisions for keeping sediment and contaminated groundwater out of the storm drain system (City of Palo Alto 2017a).

Therefore, with compliance with the NPDES GCP, the Municipal Regional Permit (MRP), preparation of a SWPPP, and implementation of site design, source control, and LID treatment control measures for new development would reduce impacts to a less than significant level.

This impact would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
b. Would the project substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the project may impede sustainable groundwater management of the basin?
The proposed HEU would substantially degrade or deplete groundwater resources or interfere substantially with groundwater recharge if future development would use significant amounts of groundwater for water supply or would significantly increase impervious surfaces or construction dewatering. Since the City receives 100 percent of its potable water from the San Francisco Public Utilities Commission (SFPUC), which obtains its supply from surface water sources, the proposed HEU would not substantially degrade or deplete groundwater resources.

Implementation of LID measures, which prioritize the use of on-site infiltration, would also result in some level of groundwater recharge. Although the proposed HEU could potentially increase impervious surfaces within the city more than what was analyzed under the 2017 EIR, future development would be facilitated on non-vacant and underutilized sites that are already built-out. Additionally, future development would be required to comply with Section

18.40.130(f) of the PAMC which lists guidelines for landscaping and pervious paving to accommodate filtration of stormwater runoff from impervious areas.

As shown in the Palo Alto groundwater dewatering map, construction dewatering sites in 2020 to 2022 were located primarily along the west of Oregon Expressway and Evergreen Park (City of Palo Alto 2022c). Under the proposed HEU, a few housing sites would be located east of Oregon Expressway and near the Evergreen Park area. Therefore, impacts would be potentially significant. However, with compliance with the City’s Construction Dewatering System Policy and Plan Preparation Guidelines and implementation of policies L-3.5 and N-4.8 of the 2030 Comprehensive Plan EIR, adopted in compliance with Mitigation Measure HYD-2 outlined in the 2017 EIR, impacts associated with construction dewatering would be less than significant.

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Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
c.(i) Would the project 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?
c.(ii) Would the project 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 substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site? c.(iii) Would the project 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 that would 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?
c.(iv) Would the project 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 impede or redirect flood flows? Similar to Scenario 6 of the 2017 EIR, the proposed HEU would not convert open space areas, creeks, or wetlands to impervious surfaces or require the alteration of the course of an existing stream or river. The proposed HEU would facilitate development on non-vacant and underutilized sites in urbanized areas. Future development would be required to implement construction phase BMPs as well as post-construction site design measures, source control measures, and stormwater LID treatment measures. Additionally, future development that disturbs one or more acre of land would be required to prepare and submit a SWPPP to the State Water Resources Control Board (SWRCB) that describes the measures to control discharges from construction sites. Pursuant to PAMC Chapter 16.28, projects that apply for a grading permit must also comply with the City of Palo Alto’s grading and erosion and sediment control requirements, which require project applicants to submit an erosion and sediment control plan for review by the city prior to the issuance of grading permits. Furthermore, pursuant to Chapter 16.11 of the PAMC, permanent stormwater pollution prevention measures must also be incorporated into future projects.

MRP-regulated projects would be required to treat 80 percent or more of the volume of annual runoff for volume-based treatment measures. Projects that create or replace 2,500 square feet or more, but less than 10,000 square feet, of impervious surface must implement site design measures to reduce stormwater runoff. All future development that satisfies Provision C.3 of the Santa Clara Valley Urban Runoff Pollution Prevention Program (SCVURPPP) would be required to implement post-construction stormwater controls into the design of the project.

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HYDROLOGY AND WATER QUALITY
98 | Page Addendum to the 2030 Comprehensive Plan EIR from a 10-year storm and project applicants must demonstrate that the runoff discharged from the site to the City’s storm drain system will not exceed its carrying capacity. In addition, the City’s Department of Public Works requires new development to provide storm drain flow and detention calculations that compare pre- and post-project flow rates and volumes. The calculations must be signed and stamped by a registered civil engineer. On-site stormwater detention may also be required to lessen the project’s impact on the City’s storm drain system.

A final grading and drainage plan must be prepared by a licensed professional that shows the existing and proposed on-site drainage layout, locations, and elevations and shows the conveyance of stormwater to the nearest City storm drain system. Existing drainage patterns, including the accommodation of off-site runoff, must be maintained (City of Palo Alto 2017a).

Therefore, facilitation of development on already built-out sites and compliance with existing State and local regulations related to stormwater would reduce impacts to a less than significant level. Therefore, this impact would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
d. In flood hazard, tsunami, or seiche zones, would the project risk release of pollutants due to project inundation?
As discussed in the 2017 EIR, only the Baylands area of Palo Alto is within a tsunami inundation zone and this is a large area of undisturbed marshlands open for recreational access. None of the housing inventory sites facilitated by the proposed HEU would be located in the Baylands area. Additionally, mud and debris flows can occur in the southern, mountainous area of Palo Alto. These areas are maintained as open space and none of the housing inventory sites are located within areas susceptible to mud or debris flows. The proposed HEU would facilitate development on flat and urbanized sites away from crests and steep ridges. Therefore, impacts would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
e. Would the project conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan?
As discussed under Impact (a), the proposed HEU would not violate water quality or degrade water quality during construction or operation.

The City of Palo Alto is under the jurisdiction of the San Francisco Bay RWQCB. The San Francisco Bay RWQCB provides permits for projects that may affect surface waters and groundwater locally and is responsible for preparing the Water Quality Control Plan for the San Francisco Bay Basin (Basin Plan). The Basin Plan designates beneficial uses of water in the region and establishes narrative and numerical water quality objectives. The Basin Plan serves as the basis for the San Francisco Bay RWQCB’s regulatory programs and incorporates an implementation plan for achieving water quality objectives (California Water Board 2017). The Item 9
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proposed project would not interfere with the objectives and goals in the Basin Plan. This impact would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would be required to comply with federal, State, and local regulations as well as policies adopted in compliance with Mitigation Measure HYD-2 pertaining to hydrology and water quality which would reduce impacts to a less than significant level. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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HYDROLOGY AND WATER QUALITY
100 | Page Addendum to the 2030 Comprehensive Plan EIR

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11 Land Use and Planning

Where was
Impact Analyzed
in the EIR?
Could Proposed
Changes
Involve New or
Substantially
More Severe
Impacts?
Do New
Circumstances
Result in New
or Substantially
More Severe
Impacts?
Does New
Information
Result in New
or Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address
and/or
Resolve
Impacts?
Would the project:
a. Physically divide an
established community?
EIR Page 4.9-13
through 4.9-15
No No No N/A
b. 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?
EIR Pages 4.9-3
through 4.9-13
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.9, Land Use and Planning, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to land use. The 2017 EIR found that the 2030 Comprehensive Plan could adversely change the type or intensity of existing or planned land use patterns in the area, and therefore mitigation measure LAND-1 would be required to guide the change in density and character in order to avoid or minimize potential impacts to a less than significant level.

Additionally, the 2030 Comprehensive Plan would allow development that could be incompatible with adjacent land uses or with the general character of the surrounding area, including density and building height. Therefore, implementation of mitigation measures LAND- 2 would be required to ensure development is compatible with adjacent land uses and that the general character in Palo Alto is maintained. The 2030 Comprehensive Plan states that the 2030 Comprehensive Plan would not allow development that could conflict with established residential, recreational, educational, religious, or scientific uses of an area; would not allow new development that could conflict with any applicable City land use plan, policy or regulation adopted for the purpose of avoiding or mitigating an environmental effect; and would not conflict with an applicable habitat conservation plan or natural community plan. However, Scenario 6 of the 2030 Comprehensive Plan would include transportation improvements at existing roadways and rail corridors that could potentially physically divide existing communities. As a result, Mitigation Measure LAND-5 would be required to promote connectivity and context-sensitive design of infrastructure improvements and to reduce impacts to a less than significant level.

Table 20 lists mitigation measures related to land use and planning in the 2017 EIR.

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LAND USE AND PLANNING
102 | Page Addendum to the 2030 Comprehensive Plan EIR Table 20 2017 EIR Mitigation Measures: Land Use and Planning Mitigation
Measure # Mitigation Text
Impact LAND-1: The proposed Plan could adversely change the type or intensity of existing or planned land use patterns in the area. (Potentially Significant and Mitigable)
LAND-1 To ensure that the intensity of future development would not adversely change the land use patterns or affect the livability of Palo Alto neighborhoods, the proposed Plan shall include policies that address the following topics:
 Strengthening of residential neighborhoods.
 Vitality of commercial areas and public facilities.
 High-quality building and site design.
 Architectural compatibility of new development.
 Promotion of appropriate infill development.
 Gradual transitions in the scale of development where residential districts abut more intense uses.

Impact LAND-2: The proposed Plan would allow development that could be incompatible with adjacent land uses or with the general character of the surrounding area, including density and building height. (Potentially Significant and Mitigable)
LAND-2 Implement Mitigation Measure LAND-1. In addition, to further reduce potential impacts to visual character and ensure compatibility with adjacent land uses, the proposed Plan shall include policies that address the following topic:
 Architectural standards that address land use transitions.

Impact LAND-5: The proposed Plan could physically divide an established community. (Potentially Significant and Mitigable)
LAND-5 To avoid potential impacts from physically dividing an established community, the proposed Plan shall include policies that address the following topics:
 Enhanced connections to and from parks, schools, and community facilities for all users.  Safe and convenient pedestrian, bicycle, and transit connections between residential areas and commercial centers.
 Cooperation with other agencies to improve circulation connections.  Grade separation of rail crossings.

Source: City of Palo Alto 2016

PROJECT-SPECIFIC IMPACTS
a. Would the project physically divide an established community? The proposed HEU would not divide a community; rather, it is designed to meet the City’s RHNA and includes implementation programs that would promote the development of existing non-vacant, underdeveloped, or underutilized sites, thereby locating people closer to existing employment, goods and services within an established community. Unlike Scenario 6 of the 2017 EIR, which included changes to transportation infrastructure, the proposed HEU would not involve the construction of barriers, such as new roads or other linear development or infrastructure, that would divide the existing communities or neighborhoods. Existing roadways would not be permanently blocked, and temporary construction would not limit access to a community or restrict movement within a community. Nonetheless, future development would continue to implement policies T-1.17 and T-1.19 of the 2030 Comprehensive Plan EIR, adopted in compliance with Mitigation Measure LAND-5 from the 2017 EIR, which would further reduce Item 9
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impacts to a less than significant level. Therefore, this impact would be less than significant with mitigation, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. b. Would the project conflict with any applicable land use plan, policy, or regulation of an agency with jurisdiction over the project (including but not limited to the general plan, specific plan, local coastal program, or zoning ordinance) adopted for the purpose of avoiding or mitigating an environmental effect?
The proposed HEU would provide a framework for introducing new housing at all levels of affordability that is within access to transit, jobs, services, and open spaces. Through its identification of sites for future development and implementation of housing programs, the project would encourage development of up to 6,695 new residential units, which would address the City’s fair share housing needs as quantified in the RHNA plus buffer. As shown in Table 2, with entitled and proposed development, ADUs, underutilized sites with no rezoning required, and rezoning to meet the RHNA, a total of 6,793 units can be accommodated, which is more than the RHNA plus 10 percent buffer of 6,695 units.

The proposed HEU would also include zoning ordinance and zoning map amendments to increase permitted density, floor area, and height in the RM-20, RM-30, CN, CC, and CS zones, and permit residential development in the ROLM and GM zones. Although the proposed HEU would allow residential development in the ROLM and GM zones, the corresponding Research/Office Park Comprehensive Plan land use designations for these zones already permit multi-family residential uses and mixed use.

The following analysis discusses the project’s consistency with relevant and applicable plans and regulations, including Plan Bay Area 2050 and the 2030 Comprehensive Plan. Consistency with Plan Bay Area is presented in Table 21, and consistency with the Comprehensive Plan is presented in Table 22. The project is determined to be either “consistent” or “inconsistent” with the identified goals and policies.

PLAN BAY AREA 2050
As shown in Table 21, the project would be consistent with the key goals and strategies of Plan Bay Area 2050. Therefore, the project would not conflict with Plan Bay Area 2050 and impacts would be less than significant.

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LAND USE AND PLANNING
104 | Page Addendum to the 2030 Comprehensive Plan EIR Table 21 Project Consistency with Plan Bay Area 2050
Measure Proposed HEU Project Consistency
Housing. Spur Housing Production for Residents of all Income Levels H1. Further strengthen renter protections
beyond state law. Building upon recent tenant
protection laws, limit annual rent increases to the
rate of inflation, while exempting units less than
10 years old.

Consistent. The HEU analyzes housing needs for present and future residents. The City’s Regional Housing Needs Assessment (RHNA) allocation is 6,086 units, which are distributed across over four income levels. The units would be distributed as is over the four income levels:
1,556 extremely low and very low units, 896 low units, 1,013 moderate units, and 2,621 above moderate units. The allocation described would be protected and not altered. Furthermore, Policy 4.3 of the proposed HEU encourages new high-quality rental housing and Program 6.6 ensures fair housing by instituting tenant protections to prevent anti- displacement and requiring a 90-day notice for rent increases of 6 percent instead of the State’s 10 percent threshold for noticing.

H2. Preserve existing affordable housing. Acquire
homes currently affordable to low and middle-
income residents for preservation as permanently
deed-restricted affordable housing.

H4. Build adequate affordable housing to ensure
homes for all. Construct enough deed-restricted
affordable homes to fill the existing gap in housing
for the unhoused community and to meet the
needs of low-income households.

Consistent. As described above, the Housing Element Update is required to provide 1,556 extremely low and very low units, 896 low units, and 1,013 moderate units. Affordable housing would be preserved for these income levels. HEU Goal 2.0 Affordable Housing and policies and programs under this goal would ensure housing affordability in Palo Alto especially for people at the lowest income levels.

H3. Allow a greater mix of housing densities and
types in Growth Geographies. Allow a variety of
housing types at a range of densities to be built in
Priority Development Areas, select Transit-Rich
Areas and Select High-Resource Areas.

Consistent. As shown in Figure 2-3 of the Project Description (Housing Element Update Sites Inventory Locations), many of the housing inventory sites are generally located in areas near major transportation corridors such as along El Camino Real or in transit-accessible Priority Development Areas (PDAs) such as the California Avenue area and the Downtown area, as well as near existing residential and commercial development. HEU Policies 3.1, 3.3, and 4.4 also aim to promote transit-oriented new construction and encourage construction of new high-density housing on major transit corridors in proximity to transit stations.

H5. Integrate affordable housing into all major
housing projects. Require a baseline of 10-20% of
new market-rate housing developments of five
units or more to be affordable to low-income
households.

Consistent. Pursuant to the City’s Below Market Rate (BMR) Housing Purchase Program, the city requires that developers for new development with three or more residential units to contribute at least 15 percent of those units at below market rates, and projects with seven or more units are required to provide one or more BMR units within the development (City of Palo Alto 2023b). Additionally, HEU Goal 2.0 Affordable Housing aims to ensure Palo Alto residents have access to quality housing at a range of housing options and prices.

EN4. Maintain urban growth boundaries. Using
urban growth boundaries and other existing
environmental protections, focus new
development within the existing urban footprint
or areas otherwise suitable for growth, as
established by local jurisdictions.

Consistent. The proposed HEU would facilitate development of housing on underutilized sites in urbanized areas of the city, which would reduce pressure to develop open space areas. By placing residents close to jobs, commercial services, and alternative methods of transportation, the project would reduce greenhouse gas emissions and other criteria pollutants associated with vehicle use to help communities stay healthy and safe.

Source: ABAG 2021
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CITY OF PALO ALTO 2030 COMPREHENSIVE PLAN
As shown in Table 22, the project would be consistent with the goals, policies, and actions within the 2030 Comprehensive Plan. As noted under Government Code Section 65589.5(a), the Legislature has concluded that “the lack of housing, including emergency shelters, is a critical problem that threatens the economic, environmental, and social quality of life in California.” More specifically, the Legislature’s stated intent is “to assure that counties and cities recognize their responsibilities in contributing to the attainment of the state housing goal…to assure that counties and cities will prepare and implement housing elements which…will move toward attainment of the state housing goal” (Government Code Section 65581). The project would help meet the city’s RHNA allocation, as well as efficiently utilize non-vacant, underutilized, and underdeveloped lots within the city to increase the supply of housing. The project would encourage development of housing, which is supportive of the city’s goal and policies.

Table 22 Project Consistency with Relevant 2030 Comprehensive Plan Goals and Policies Comprehensive Plan Policy Proposed HEU Project Consistency Land Use Element
Policy L-1.2: Limit future urban development to
currently developed lands within the urban service
area. The boundary of the urban service area is
otherwise known as the urban growth boundary.

Retain undeveloped land west of Foothill Expressway
and Junipero Serra as open space, with allowances
made for very low-intensity development consistent
with the open space character of the area. Retain
undeveloped land northeast of Highway 101 as open
space.

Consistent. Most of the housing inventory sites are located in areas near major transportation and commercial corridors such as along El Camino Real or in transit-accessible PDAs such as the California Avenue area and the Downtown area, or are located in commercial areas such as GM/ROLM zones. None of the housing inventory sites are located in areas designated as open space.

Policy L-2.4: Use a variety of strategies to stimulate
housing, near retail, employment, and transit, in a
way that connects to and enhances existing
neighborhoods.

Consistent. As shown in Figure 3of the Project Description (Housing Element Update Sites Inventory Locations), most of the housing inventory sites are located in areas near major transportation and commercial corridors such as along El Camino Real or in transit- accessible PDAs such the California Avenue area and the Downtown area, as well as near existing residential and commercial development. The proposed HEU would also
encourage residential uses in areas shown on Figure 4 and Figure 5. These areas are located near existing services. The addition of housing in the GM/ROLM zones shown on Figure 4 would place housing near services (including those in Mountain View) and on underutilized commercial parcels. Overall, the proposed HEU would create walkable neighborhoods and increase transit ridership.

Policy L-2.8: When considering infill redevelopment,
work to minimize displacement of existing residents.

Consistent. The proposed HEU would facilitate development on non-vacant and underutilized sites. Program 6.6 of the HEU ensures tenant protections and prevents anti-displacement.

Policy L-2.9: Facilitate reuse of existing buildings. Consistent. The proposed HEU would not hinder reuse of existing buildings by facilitating development on non-vacant and underutilized sites in urbanized areas.

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IMPACT ANALYSIS

LAND USE AND PLANNING
106 | Page Addendum to the 2030 Comprehensive Plan EIR Comprehensive Plan Policy Proposed HEU Project Consistency Policy L-1.3: Infill development in the urban service
area should be compatible with its surroundings and
the overall scale and character of the city to ensure a compact, efficient development pattern.

Policy L-3.1: Ensure that new or remodeled structures
are compatible with the neighborhood and adjacent
structures.

Policy L-6.1: Promote high-quality design and site
planning that is compatible with surrounding
development and public spaces.

Policy L-6.2: Use the Zoning Ordinance, design review
process, design guidelines and Coordinated Area
Plans to ensure high quality residential and
commercial design and architectural compatibility.

Consistent. Development facilitated by the proposed HEU would be subject to the City’s Major Architectural Review which includes a hearing and recommendation by the Architectural Review Board on whether the individual project is consistent with the findings for Architectural Review outlined in PAMC Section 18.76.020. This process aims to promote orderly and harmonious development in the city and promote visual environments that are of high aesthetic quality and variety and which, at the same time, are considerate of each other. Additionally, future development in locations within specific area plans would be required to adhere to development guidelines outlined within the respective coordinated area plans, such as the North Ventura Coordinated Area Plan following its adoption. If projects qualify for streamlined review, multifamily projects would be subject to objective design standards that aim to create high-quality design and compatibility with surrounding uses and character.

Transportation Element
Policy T-1.3: Reduce GHG and pollutant emissions
associated with transportation by reducing VMT and
per-mile emissions through increasing transit options,
supporting biking and walking, and the use of zero-
emission vehicle technologies to meet City and State
goals for GHG reductions by 2030.

Consistent. As shown in Figure 3 (Housing Element Update Sites Inventory Locations), most of the housing inventory sites are located in areas near major transportation corridors such as along El Camino Real, or in transit-accessible PDAs such as the California Avenue area and the Downtown area, as well as near existing residential and commercial development. HEU Policies 3.1, 3.3, and

4.4 also aim to promote transit-oriented new construction and encourage construction of new high-density housing on major transit corridors in proximity to transit stations. The addition of housing in the GM/ROLM zones shown on Figure 4 would place housing near services (including those in Mountain View) and on underutilized commercial parcels. Pursuant to Section 16.14.420 of the PAMC, new multi-family residences would be required to provide at least one EVSE Ready outlet or EVSE installed for each residential unit in the structure for residential parking, and would be required to provide Conduit Only, EVSE Ready Outlet, or EVSE installed for at least 25 percent of guest parking spaces, among which at least 5 percent shall be EVSE installed. Future development facilitated by the project would be required to comply with the most updated EV requirements in both the City’s Reach Code and Title 24 at the time of construction.

Source: City of Palo Alto 2017b
As shown in Table 21 and Table 22, the proposed HEU would not conflict with applicable goals and policies in Plan Bay Area 2050 or the 2030 Comprehensive Plan. Therefore, impacts would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not physically divide an established community or conflict with any applicable land use plan, policy, or regulation, and Item 9
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impacts would be less than significant with mitigation. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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LAND USE AND PLANNING
108 | Page Addendum to the 2030 Comprehensive Plan EIR

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12 Mineral Resources

Where was
Impact
Analyzed in
the EIR?
Could Proposed
Changes
Involve New or
Substantially
More Severe
Impacts?
Do New
Circumstances
Result in New
or Substantially
More Severe
Impacts?
Does New
Information
Result in New
or Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address
and/or
Resolve
Impacts?
Would the project:
a. 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?
EIR Pages 7-2
through 7-3
No No No N/A
b. 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?
EIR Pages 7-2
through 7-3
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
The City’s Comprehensive Plan EIR analyzes mineral resources in Chapter 7, CEQA-Mandated Sections, and found that no impacts related to mineral resources would occur.

PROJECT-SPECIFIC IMPACTS
a. Would the project 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?
b. Would the project 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? According to the 2017 EIR, most of the city is classified as MRZ-1 9 , MRZ-3
10 , or MRZ-4
11 ,
meaning that no significant mineral deposits are present or data does not exist to identify the significance of mineral deposits (City of Palo Alto 2017a). Therefore, there would be no impacts regarding mineral resources, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because here would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

9 MRZ-1: Adequate information indicates that no significant mineral deposits are present or likely to be present. 10 MRZ-3: The significance of mineral deposits cannot be determined from the available data. 11 MRZ-4: There is insufficient data to assign any other MRZ designation.

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MINERAL RESOURCES
110 | Page Addendum to the 2030 Comprehensive Plan EIR

CONCLUSION
As with what was analyzed under the 2017 EIR, there would be no impacts related to mineral resources. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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13 Noise

4.10-2
through

4.10-18;

4.10-21
through

4.10-26
No No No Yes
b. Generation of excessive
ground-borne vibration or
groundborne noise levels?
EIR Pages

4.10-18
through

4.10-21
No No No N/A
c. 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?
EIR Pages

4.10-26
through

4.10-28
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.10, Noise, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to on-site operational noise, traffic noise, and construction noise. The 2017 EIR found that impacts related to long-term non-transportation, operational noise would be potentially significant due to zoning changes for commercial and residential uses, and mitigation measure NOISE-1a would be required to reduce impacts to a less than significant level. The 2017 EIR also found that transportation noise impacts related to aircraft and railway noise sources would be potentially significant due to encroachment of land uses near aircraft facilities, along with unknown future operations patterns, which could potentially result in unacceptable aircraft-related noise environments from one or both of these Palo Alto-based facilities (Stanford University Hospital helipad and the Palo Alto Airport). Therefore, mitigation measures NOISE-1b and NOISE-1c would be required to reduce impacts to a less than significant level. Additionally, the 2030 Comprehensive Plan would have the potential to result in noise level increases such that Ldn would increase by three dB, causing the Ldn in existing residential areas to exceed 60 dBA.

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IMPACT ANALYSIS
NOISE
112 | Page Addendum to the 2030 Comprehensive Plan EIR impacts from long-term operational noise as well as transportation noise related to aircraft and railway noise to a less than significant level.

The 2017 EIR determined that the 2030 Comprehensive Plan would have the potential to result in indoor noise levels for residential development to exceed 45 dB Ldn, and mitigation measures NOISE-4a and NOISE-4b would be required to reduce indoor noise impacts to a less than significant level. Furthermore, the 2030 Comprehensive Plan would have the potential to expose persons to or generate excessive ground-borne vibration or ground-borne noise levels, and therefore impacts related to temporary construction-related vibration, long-term operational vibration, and railway-related vibration could be potentially significant, requiring implementation of mitigation measures NOISE-5a and NOISE-5b to reduce vibration impacts to a less than significant level. The 2017 EIR also concluded that the 2030 Comprehensive Plan would have the potential to expose people to noise levels in excess of established State standards and standards established in the local General Plan or noise ordinance since previous Comprehensive Plan policies do not require acoustical analyses to demonstrate compliance with applicable interior or exterior noise compatibility standards. Therefore, implementation of mitigation measures NOISE-6 and NOISE-7 would be required to ensure that pertinent exterior and interior noise environments would comply with City guidelines and State standards.

Additionally, the 2030 Comprehensive Plan could result in a potentially substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project since certain construction activities may lead to substantial temporary or periodic increases to ambient noise levels. Mitigation measure NOISE-8 would be required to reduce impacts to a less than significant level.

The 2017 EIR found that the 2030 Comprehensive Plan would not expose people residing or working within an airport land use plan or within two miles of a public airport to excessive noise levels since all areas of Palo Alto are miles outside of the pertinent 65 dBA CNEL noise contour of medium or large airports including the Moffett Federal Airfield (KNUQ), San Carlos Airport (KSQL), San Jose International Airport (SJC), San Francisco International Airport (SFO), and Oakland International Airport (OAK). Additionally, since only airport property and the golf course – neither of which are noise-sensitive land uses – are within the Palo Alto Airport’s 60 dBA CNEL noise contours, within-city public airport noise impacts would also be less than significant.

Table 23 lists mitigation measures related to noise in the 2017 EIR.

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Table 23 2017 EIR Mitigation Measures: Noise
Mitigation
Measure # Mitigation Text
Impact NOISE-1: Implementation of the proposed Plan would have the potential to cause the average 24-hour noise level (Ldn) to increase by 5.0 decibels (dB) or more in an existing residential area, even if the Ldn would remain below 60 dB. (Potentially Significant and Mitigable)
NOISE-1a To ensure that average 24-hour noise levels associated with long term operational noise would not increase by 5.0 decibels (dB) or more in an existing residential area, the proposed Plan shall include policies that address the following topics:
 Location of land uses in areas with compatible noise environments.  Use of the guidelines in the “Land Use Compatibility for Community Noise Environment” table to evaluate the compatibility of proposed land uses with existing noise environments.  Clear guidelines for maximum outdoor noise levels in residential areas.  Adherence to the interior noise requirements of the State of California Building Standards Code (Title 24) and the Noise Insulation Standards (Title 25).
 Inclusion of a noise contour map in the proposed Plan.  Reduction of noise impacts of development on adjacent properties.  Updating for clarity the Noise Ordinance to make enforcement easier.

NOISE-1b To ensure that aircraft noise would not increase average 24-hour noise levels by 5.0 decibels (dB) or more in an existing residential area, the proposed Plan shall include policies that address the following topics:
 Compliance with the airport-related land use compatibility standards for community noise environments.
 Prohibition of incompatible land use development within the 60 dBA CNEL noise contours of the Palo Alto airport, as established in the adopted County of Santa Clara Airport Land Use Commission Comprehensive Land Use Plan (CLUP) for the Palo Alto Airport.

NOISE-1c To ensure that railway noise would not increase average 24-hour noise levels by 5.0 decibels (dB) or more in an existing residential area, the proposed Plan shall include policies that address the following topics:
 Noise spillover from rail-related activities into adjacent noise-sensitive areas.  Reduction of impacts from noise and ground borne vibrations associated with rail operations.  Guidelines for interior noise levels.
 Requirements for vibration impact analysis for future development projects.

Impact NOISE-2: Implementation of the proposed Plan would not cause the Ldn to increase by three dB or more in an existing residential area, thereby causing the Ldn in the area to exceed 60 dB. (Significant and Mitigable) NOISE-2 Implement Mitigation Measures NOISE-1a, NOISE-1b, and NOISE-1c.

Impact NOISE-3: Implementation of the proposed Plan would have the potential to cause an increase of three dB or more in an existing residential area where the Ldn currently exceeds 60 dB. (Potentially Significant and Mitigable) NOISE-3 Implement Mitigation Measures NOISE-1a, NOISE-1b, and NOISE-1c.

Impact NOISE-4: Implementation of the proposed Plan would have the potential to result in indoor noise levels for residential development to exceed an Ldn of 45 dB. (Potentially Significant and Mitigable) NOISE- 4a Implement Mitigation Measure NOISE-1a.

NOISE-4b The Land Use Noise Compatibility Guidelines established in the current Comprehensive Plan shall be maintained under all six scenarios.

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NOISE
114 | Page Addendum to the 2030 Comprehensive Plan EIR Mitigation
Measure # Mitigation Text
Impact NOISE-5: Implementation of the proposed Plan would have the potential to expose persons to or generate excessive ground-borne vibration or ground-borne noise levels.(Potentially Significant and Mitigable) NOISE-5a To ensure that future development would not result in significant construction-related vibration impacts, the proposed Plan shall include policies that address the following topics:
 Requirements for construction and operations vibration impact analysis, to be prepared by a qualified acoustical consultant for development projects.
 Requirements for vibration mitigation plans to ensure compliance with the pertinent industry standards and City guidelines for projects that would experience vibration impacts during construction or operations.
 Limits for construction and operations vibration around vibration-sensitive receptors.

NOISE-5b Implement Mitigation Measure NOISE-1c.

Impact NOISE-6: Implementation of the proposed Plan would have the potential to expose people to noise levels in excess of established State standards. (Potentially Significant and Mitigable) NOISE-6 Implement Mitigation Measures NOISE-4a and NOISE-4b Impact NOISE-7: Implementation of the proposed Plan would have the potential to result in the exposure of persons to or generation of noise levels in excess of standards established in the local General Plan or noise ordinance, or applicable standards of other agencies. (Potentially Significant and Mitigable) NOISE-7 Implement Mitigation Measures NOISE-1a, NOISE-1b, NOISE-1c, NOISE-4a, and NOISE-4b.

Impact NOISE-8: Implementation of the proposed Plan could result in a potentially substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project. (Potentially Significant and Mitigable)
NOISE-8 To ensure that future development would not result in significant impacts to sensitive receptors from construction noise, the proposed Plan shall include policies that address the following topics:
 Construction noise limits around sensitive receptors.  Monitoring and reporting plans for construction noise levels of larger development projects.  Noise control measures to ensure compliance with the noise ordinance.

Source: City of Palo Alto 2016

PROJECT-SPECIFIC IMPACTS
a. Would the project 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? Standards for interior noise in Palo Alto are currently determined primarily through the Land Use Noise Compatibility Guidelines and interior noise standards set by Title 24 of the State Building Code, while standards for exterior noise are currently determined primarily through the City’s Noise Ordinance, or PAMC Chapter 9.10, and PAMC Section 18.42.190 which outlines requirements for noise and vibration. Although the proposed HEU would include 919 more residential units compared to buildout analyzed in the 2017 EIR and could therefore result in an increased amount of noise in excess of established standards, future development requiring discretionary approval would be required to conduct project-level acoustical analysis pursuant to Section 18.42.190 of the PAMC to demonstrate consistency with applicable land use compatibility requirements and noise standards.

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CONSTRUCTION NOISE IMPACTS
Noise from increased construction could also temporarily or periodically increase ambient noise levels within the city. Engine noise reduction technology, including silencers, continues to improve, but heavy construction equipment still generates noise exceeding ambient levels that could cause intermittent annoyance to nearby receivers. Even with adherence to the city’s allowed construction hours of 8 a.m. through 6 p.m. on Monday to Friday and 9 a.m. through 6 p.m. on Saturday, as well as maximum construction noise levels of 110 dBA at a distance of 25 feet pursuant to PAMC Section 9.10.060, it is likely that in certain cases these and other available methods to reduce noise would be inadequate to prevent a significant impact.

Therefore, future development would also be required to comply with Policy N-6.11 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measure NOISE-8 of the 2017 EIR which would reduce noise impacts to a less than significant level. Therefore, this impact would be less than significant with mitigation, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

TRANSPORTATION-RELATED NOISE IMPACTS

AIRPORT/HELIPORT NOISE
As discussed in the 2017 EIR, because Palo Alto has only one heliport at Stanford University Hospital, and one airport, the Palo Alto Airport, notable increases in ambient noise levels from air traffic are not anticipated. However, encroachment of land uses near these aircraft facilities, along with unknown future operations patterns, could potentially result in unacceptable aircraft-related noise environments from one or both of these Palo Alto-based facilities. Aircraft operations may cause the L
dn to increase by five DB or more in an existing residential area. The proposed HEU does not envision housing inventory sites in proximity to the Stanford University Hospital helipad, and the closest housing inventory site from the Palo Alto Airport would be located approximately three miles southeast. As with the 2017 EIR, future development would be required to comply with
policies L-10.3 and N-6.12 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measure NOISE-1b, which would reduce impacts from airport or heliport noise to a less than significant level, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

RAILWAY NOISE
As discussed in the 2017 EIR, with only one single railway alignment through the city, railway operations (primarily Caltrain pass-bys) are not anticipated to notably increase community noise levels, except in the immediate vicinity of the rail lines. However, the 2017 EIR determined that since a definitive assessment of operations increases cannot be determined, future railway operations could potentially cause the L dn to increase by five dB or more in an
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IMPACT ANALYSIS
NOISE
116 | Page Addendum to the 2030 Comprehensive Plan EIR along Alma Street where Caltrain runs parallel, impacts could potentially be significant.

However, future development would be required to comply with policies N-6.11 and N-6.14 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measure NOISE-1c, which would reduce impacts from railway noise to a less than significant level, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

OPERATIONAL NOISE IMPACTS
As discussed in the 2017 EIR, development would have the potential to receive noise from both highways and major arterials, and certain areas would require special noise-insulating features or construction techniques. Project-level acoustical analyses, at a minimum, would need to examine portions of individual housing sites nearest to major transportation corridors to measure current, 24-hour ambient noise levels and determine appropriate site design and/or construction techniques for noise attenuation. Future development facilitated by the proposed HEU would be required to conduct project-level acoustical analysis pursuant to Section

18.42.190 of the PAMC, and would be required to comply with policies N-6.1, 6.2, and 6.6 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measure NOISE-1a of the 2017 EIR, which would reduce impacts on interior noise to a less than significant level, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan.

The project allows for higher density/intensity land uses in some areas of Palo Alto than currently permitted, leading to additional vehicle trips on area roadways. Under full buildout of the project, an estimated 919 new units compared to buildout in the 2030 Comprehensive Plan would be added to Palo Alto. By generating new vehicle trips, new development would incrementally increase the exposure of land uses along roadways to traffic noise. Development facilitated by the project would increase vehicle trips in Palo Alto, depending on the location and intensity of individual projects. As discussed under Section 3, Air Quality, the proposed HEU would increase residential vehicle trips from 2015 conditions by 17.3 percent. It is unlikely that a vehicle trip growth of 17.3 percent would result in a 100 percent increase in traffic volumes on a given roadway segment. When analyzing roadway vehicle trips, a three dBA increase in noise is considered noticeable. A 40 percent increase in trips equates to a noise increase of less than 1.5 decibels. A 1.5 dBA increase in noise would not be perceptible, and the increase in traffic volumes on any given roadway segment is expected to be below 40 percent. A doubling of traffic volumes would be required to reach the threshold of noticeability (a 3-dba increase in noise levels). A doubling of traffic volumes on a roadway (i.e., a 100 percent increase) is not anticipated under the project, considering trips are only anticipated to increase by 17.3 percent. Traffic volumes on streets would not increase by 40 percent on average, and therefore increases in traffic noise would be less than perceptible. Increases in roadway noise would be less than significant generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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LONG-TERM OPERATIONAL NOISE IMPACTS
As discussed in the 2017 EIR, zoning changes could result in noise level increases such that Ldn would increase by three dB, causing the Ldn in a residential area to exceed 60 dBA Ldn. The proposed rezoning that would occur under the proposed HEU would allow for increased residential density in RM-20, RM-30, CN, CC, and CS zones, and would allow for residential uses in non-residential zones such as ROLM and GM zones. Therefore, as with the 2017 EIR, impacts would be potentially significant. However, future development would be required to comply with policies N-6.1, 6.2, and 6.6 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measures NOISE-2 and NOISE-3 of the 2017 EIR, which would reduce impacts from long-term operational noise to a less than significant level, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
b. Would the project result in generation of excessive groundborne vibration or groundborne noise levels?
As discussed in the 2017 EIR, groundborne vibration can be related to short-term impacts from construction activities, on-going impacts related to operation, or on-going impacts related to rail pass-bys.

CONSTRUCTION VIBRATION IMPACTS
Since the proposed HEU would include 919 more residential units compared to Scenario 6 of the 2017 EIR, vibration resulting from construction activities could occur more frequently; however, the intensity of vibration would be similar as analyzed previously as the type of equipment anticipated would be similar. Overall, vibration impacts related to construction would be short-term, temporary, and generally restricted to the areas in the immediate vicinity of active construction equipment. Methods to reduce vibration during construction would include the use of smaller equipment, use of well-maintained equipment, use of static rollers instead of vibratory rollers, and drilling of piles as opposed to pile driving. Methods to reduce human impacts of vibration from construction include limitations on construction hours and/or guidelines for the positioning of vibration-generating construction equipment. Construction would be localized and would occur intermittently for varying periods of time. Because specific, project-level information is not available at this time, it is not possible to quantify construction- related vibration impacts at specific sensitive receptors. Future development requiring discretionary approval would be required to undergo individual review to ensure construction vibration impacts are reduced. Nonetheless, vibration impacts could be potentially significant and construction of future development would be required to comply with policies N-6.3, 6.11, and 6.14 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measures NOISE-5a and NOISE-5b of the 2017 EIR, which would reduce construction-related vibration impacts to a less than significant level, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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OPERATIONAL VIBRATION IMPACTS
Future development would have a significant environmental effect involving operational vibration if it would increase the risk of harm to surrounding properties from such vibrational hazards. Since operation of residential housing development would not involve activities that would result in substantial vibration levels, such as use of heavy equipment or machinery, the project would not have any known environmental impact involving operational vibration.

Additionally, future development would be required to comply with Section 18.42.190 of the PAMC which contains restrictions regarding the generation of vibration that is perceptible without instruments at the lot line of the receiving property. Therefore, impacts would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan.

Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

RAILWAY PASS-BY VIBRATION IMPACTS
CEQA is concerned with the impacts of a project on the environment, and not the impacts of the environment on a project. A project would not have a significant environmental effect involving railway pass-by vibration, unless the project would increase the risk of harm to surrounding properties from such vibrational hazards. Therefore, the project would not have any known environmental impact involving railway pass-by vibration.

Even if CEQA were concerned with impacts of the environment on projects, the impact would be less than significant. The 2017 EIR states that Scenario 6 may result in long-term vibration impacts if sensitive land uses were allowed to be developed in proximity to existing railways.

Since the proposed HEU would include 919 more residential units compared to Scenario 6 of the 2017 EIR, it would place more sensitive receptors in proximity to existing railways. These additional receptors would be exposed to similar vibration levels as considered in the 2017 EIR.

While vibration impacts related to rail pass-bys would be short-term, temporary, and generally restricted to the areas in the immediate vicinity of a railway, vibration effects from on-going rail pass-bys could be objectionable. These vibration effects can range from no perceptible effects at the lowest vibration levels, to low rumbling sounds and perceptible vibrations at moderate levels, to slight structural damage at the highest levels. Vibration from rail pass-bys rarely reaches the levels that can damage structures, but groundborne vibration and groundborne noise can reach perceptible and audible levels in buildings that are close to railways. As such, appropriate setbacks, buffers, and/or other measures can largely eliminate these impacts since these basic techniques are particularly effective approaches to avoid vibration impacts.

However, individual project review would still be needed to ensure appropriately reduced vibration impacts arising from rail pass-bys. Future development would also be required to comply with policies N-6.3, 6.11, and 6.14 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measures NOISE-5a and NOISE-5b of the 2017 EIR, which would reduce railway pass-by vibration impacts to a less than significant level, generally the same as the impact for the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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c. 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?
As discussed in the 2017 EIR, the City of Palo Alto owns and operates the Palo Alto Airport (KPAO), a relatively small public air facility which primarily serves single-engine, general aviation (GA) aircraft. At the nearest points within city limits, Palo Alto is located approximately 2.6 miles to the west of Moffett Federal Airfield (KNUQ), 6 miles to the southeast of San Carlos Airport (KSQL), 10 miles to the northwest of the San Jose International Airport (SJC), 15 miles to the southeast of San Francisco International Airport (SFO), and 17 miles to the south of Oakland International Airport (OAK) (City of Palo Alto 2017a). As shown in Figure 5 of the Palo Alto Airport CLUP, none of the housing inventory sites are located within the airport’s 55 to 70 CNEL noise contours, and therefore would not exceed the “Normally Acceptable” noise levels for compatibility for those land uses. Nonetheless, as with the 2017 EIR, future development would be required to comply with policies L-10.3 and N-6.12 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measure NOISE-1b, which would reduce impacts from airport or heliport noise to a less than significant level. Therefore, impacts would be less than significant with mitigation, and would be generally the same as the impact for the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would result in less than significant impacts regarding noise and vibration with implementation of policies adopted in compliance with Mitigation Measures NOISE-1a through NOISE-1c, NOISE-2, NOISE-3, NOISE-4a and NOISE- 4b, and 5a and 5b of the 2017 EIR. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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14 Population and Housing

4.11-5
through

4.11-10
No No No Yes
b. Displace substantial numbers
of existing people or housing,
necessitating the construction
of replacement housing
elsewhere?
EIR Pages

4.11-10
through

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No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.11, Population and Housing, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to population and housing growth. The 2017 EIR found that Scenario 6 of the 2030 Comprehensive Plan could increase the total population from 65,685 persons in 2014 to 79,765 persons in 2030, resulting in an addition of 2,665 persons or a 3.34 percent increase from ABAG projections. However, the 2017 EIR concluded that the exceedance of ABAG projections is intended to help to lower the jobs-to employed-resident ratio by providing more local housing opportunities, thereby helping to alleviate the need for workers to commute to Palo Alto from other areas of the region. Therefore, the 2030 Comprehensive Plan would not directly or indirectly induce substantial population growth and impacts would be less than significant.

The 2017 EIR determined that the 2030 Comprehensive Plan would not displace a substantial number of existing housing or people or necessitate the construction of replacement housing elsewhere since the 2015-2023 Housing Element included policies and programs that protect existing residents, neighborhoods, and housing. Additionally, the 2030 Comprehensive Plan would not create a substantial imbalance between employed residents and jobs, and impacts would be less than significant.

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PROJECT-SPECIFIC IMPACTS
a. Would the project 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)?
For the purposes of this analysis, buildout under the proposed HEU would add up to 6,919 new residential units in the city by the year 2031, or approximately 919 residential units more than what was analyzed under Scenario 6 of the Comprehensive Plan EIR. Based on the estimated number of 2.51 residents per household, the additional 919 units compared to Scenario 6 would lead to an increase of approximately 2,307 new residents during the housing element cycle 2023 to 2031 assuming all of the estimated 919 units are built (DOF 2022).

Although the proposed HEU would increase residential units compared to Scenario 6, the State requires that all local governments adequately plan to meet the housing needs of their communities. Given that the State is currently in an ongoing housing crisis due to an insufficient housing supply, the additional units under the proposed project would further assist in addressing the existing crisis and meeting the housing needs of the City’s communities.

Furthermore, the proposed HEU would first be submitted to the HCD for review and approval to ensure that it would adequately address the housing needs and demands of the city.

Approval by the HCD would ensure that population and housing growth under the proposed HEU would not be substantial or unplanned.

Additionally, growth under the proposed HEU would be concentrated in locations where such development is encouraged by adopted plans due to their proximity to transit and transportation corridors as well as located near commercial uses and services and on underutilized sites. The proposed HEU would facilitate infill growth, promote housing in close proximity to employment opportunities, and support regional planning efforts.

Lastly, this analysis is conservative because it assumes a maximum buildout scenario. The project’s actual contribution to population growth may be less than estimated. In addition, the project would not involve the extension of roads or other infrastructure that could indirectly lead to population growth. The city is mostly developed and is supported by existing public services and infrastructure which are sufficient to serve the additional housing units. Therefore, the project would not result in substantial unplanned population growth, either directly or indirectly, and impacts would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
b. Would the project displace substantial numbers of existing people or housing, necessitating the construction of replacement housing elsewhere?
“Substantial” displacement would occur if the proposed project would displace more residences than would be accommodated through growth facilitated by the project. The goal of the proposed project is to accommodate and encourage new residential development in Palo Item 9
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Alto. A portion of the housing units would be developed at a density range that could accommodate low and very low-income housing as required to meet the 6th Cycle RHNA.

Development under the proposed HEU would result in 919 more residential units compared to Scenario 6 of the 2017 EIR. The proposed buildout, in addition to existing and planned housing projects, would result in an overall increase in available housing which exceeds the City’s RHNA requirements. Therefore, overall, the proposed HEU would add to the City’s housing stock to meet housing goals.

On an individual site basis, it is possible that some redevelopment projects could result in displacement of current residents. However, the proposed HEU includes policies and programs to reduce displacement impacts. For example, Program 2.2 addresses the potential loss of rental housing and displacement of lower- and moderate-income households due to new development and ensures the retainment of a stock of affordable housing through a Below Market Rate (BMR) Program, while Program 6.6 of the proposed HEU aims to provide fair housing and Implementing Objective 6 serves to institute tenant protections to prevent anti- displacement.

Therefore, although the proposed HEU would provide additional housing in excess of RHNA requirements and Scenario 6, there are policies and programs in place to reduce displacement resulting from the proposed project, and impacts would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not induce substantial unplanned population growth or displace substantial numbers of existing people and housing, and impacts would be less than significant. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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15 Public Services

Where was
Impact
Analyzed in
the EIR?
Could Proposed
Changes Involve
New or
Substantially More
Severe Impacts?
Do New
Circumstances
Result in New or
Substantially
More Severe
Impacts?
Does New
Information
Result in New
or Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address and/or
Resolve
Impacts?
Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, or the 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:
a. Fire protection? EIR Page

4.12-9
through

4.12-11
No No No N/A
b. Police protection? EIR Page

4.12-13
through

4.12-14
No No No N/A
c. Schools? EIR Page

4.12-2
through

4.12-7
No No No N/A
d. Parks? EIR Pages

4.12-17
through

4.12-20
No No No N/A
e. Other public
facilities?
EIR Pages

4.12-22
through

4.12-24
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.12, Public Services and Recreation, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to public services. The 2017 EIR states that the 2030 Comprehensive Plan would not result in an adverse physical impact associated with the construction of additional school facilities, fire protection facilities, police facilities, and libraries. Impacts would be less than significant. However, the 2017 EIR found that the 2030 Comprehensive Plan could result in an adverse physical impact from the construction of additional parks and recreation facilities since Scenario 6 would require new parkland to accommodate new development and meet the City’s parkland standard. Therefore, implementation of mitigation measure PS-7 would be required to reduce impacts to a less than significant level.

Table 24 lists mitigation measures related to public services and recreation in the 2017 EIR.

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126 | Page Addendum to the 2030 Comprehensive Plan EIR Table 24 2017 EIR Mitigation Measures: Public Services and Recreation Mitigation
Measure # Mitigation Text
Impact PS-7: Implementation of the proposed Plan would result in an adverse physical impact from the construction of additional parks and recreation facilities in order to maintain acceptable performance standards. (Significant and Mitigable)
PS-7 To address the potential physical impacts of park construction/improvement, the Comprehensive Plan Update and/or the Parks, Trails, Natural Open Space and Recreation Master Plan shall incorporate policies addressing the following topic:
 Evaluation and mitigation of construction impacts associated with park and recreational facility creation and expansion.

Source: City of Palo Alto 2016

PROJECT-SPECIFIC IMPACTS
a. Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered fire protection facilities, or the need for new or physically altered fire protection facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times or other performance objectives?
To meet increased demand under the 2030 Comprehensive Plan, the 2017 EIR found that the City of Palo Alto Fire Department (PAFD) would likely increase staffing for EMS delivery and new apparatus and fire station improvements or expansions, but would not anticipate the need to construct a new station, as development would be located in existing urbanized areas already served by existing PAFD stations. Furthermore, the city’s approved infrastructure plan includes the replacement of two fire stations (City of Palo Alto 2017a). Fire Station 3 was replaced in March 2020 to meet the most current California Building Codes (CBC), Essential Services Building Seismic Safety Act, American with Disabilities Act (ADA), National Fire Protection Association (NFPA), and OSHA standards, and Fire Station 4 is currently underway and will be completed in December 31, 2025 (City of Palo Alto 2022d).

Although the proposed HEU would increase the number of residential units by 919 compared to Scenario 6 of the 2017 EIR, future development would be facilitated on non-vacant and underutilized sites in urbanized areas such as along El Camino Real, the California Avenue area, the Downtown area, and in the GM/ROLM zones which are already served by existing fire stations. Future remodeling or expansion of PAFD facilities to accommodate new equipment would not be needed to specifically to serve the additional residential units, which would be added incrementally in various locations in the city and served by more than one fire station.

Therefore, impacts would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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b. Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered police protection facilities, or the need for new or physically altered police protection facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times or other performance objectives?
Police protection in the city is provided by the Palo Alto Police Department (PAPD). As discussed under Impact (a), although the proposed HEU would increase the number of residential units by 919 compared to Scenario 6 of the 2017 EIR, future development would be facilitated on non- vacant and underutilized sites in urbanized areas such as El Camino Real, the California Avenue area, the Downtown area, and in the GM/ROLM zones, which are already served by an existing police station. The PAPD has already indicated that the existing police station is inadequate to accommodate current and future needs, and the city is currently constructing a new Public Safety Building (PSB) at 250 Sherman Avenue which will serve as the new headquarters of the Police Department, the Fire Department and the Office of Emergency Services and house the city's dispatch operation. Future construction or expansion of the PAPD facility would not be a result specifically of the additional residential units and was evaluated separately in accordance with CEQA to identify potential environmental impacts and mitigation measures as needed for the approved project. With the new police station, which is anticipated to be operational in early 2024, police services would be adequate to accommodate current and future needs of the city. Although additional units would result in varying amounts of housing, population, and employees, the HEU identifies sizes for rezoning and directs new housing construction to sites and areas of Palo Alto that are already urbanized, all of which are currently served by the PAPD and within the city limit of Palo Alto. Therefore, impacts would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. c. Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered schools, or the need for new or physically altered schools, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios or other performance objectives? Palo Alto is served by the Palo Alto Unified School District (PAUSD), which consists of 12 primary schools, three middle schools, two high schools, and an adult school. In general, kindergarten enrollment has been increasing within PAUSD, however, projections forecast a decline in enrollment district-wide across a 10-year period based upon historical enrollment trends and projected new development (DecisionInsite 2021).

As discussed in the 2017 EIR, Scenario 6 would result in enrollment that would exceed the capacity of existing PAUSD elementary schools, middle schools, and high schools. Since the proposed HEU would include 919 more units compared to Scenario 6, the proposed HEU would also result in enrollment that would exceed the capacity of existing PAUSD schools. Although the increased enrollment would add stress to schools in PAUSD, this growth would occur over a period of approximately 8 years from 2023 to 2031, resulting in a gradual increase in demand for school service in PAUSD. Additionally, in order to offset a project’s potential impact to Item 9
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128 | Page Addendum to the 2030 Comprehensive Plan EIR schools, school impact fees would be charged to new residential and commercial development that occurs under the proposed project consistent with State law. Government Code 65995 (b) establishes the base amount of allowable developer fees a school district can collect from development projects located within its boundaries. The fees obtained by school districts that serve Palo Alto are used for construction or reconstruction of school facilities. Future development facilitated by the proposed project would be required to pay school impact fees which, pursuant to Section 65995 (3) (h) of the California Government Code (Senate Bill 50, chaptered August 27, 1998), are “deemed to be full and complete mitigation of the impacts of any legislative or adjudicative act, or both, involving, but not limited to, the planning, use, or development of real property, or any change in governmental organization or reorganization.” Facility expansions in the PAUSD would require project-specific environmental analysis under CEQA to address site-specific environmental concerns. Therefore, existing laws and regulations that require funding for the provision or expansion of new school facilities would offset impacts from new residential development, and impacts would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan.

Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. d. Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered parks, or the need for new or physically altered parks, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios or other performance objectives? Refer to Section 16, Recreation.
e. Would the project result in substantial adverse physical impacts associated with the provision of other new or physically altered public facilities, or the need for other new or physically altered public facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times or other performance objectives?
The 2017 EIR states that while an overall increase in residents is expected, the growth would occur incrementally throughout the 15-year time horizon of the 2030 Comprehensive Plan; therefore, potential impacts from increased demand from library services would not occur in the immediate future. Similarly, growth induced from the proposed HEU would occur incrementally over eight years from 2023 to 2031. Pursuant to Chapter 16.58 of the PAMC, future development would be required to contribute impact fees to offset potential impacts from increased demand in library facilities and to ensure library facilities remain adequate.

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CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not result in the construction of new or physically altered public facilities, and impacts would be less than significant. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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16 Recreation

4.12-17
through

4.12-20
No No No Yes
b. Include recreational facilities or
require the construction or
expansion of recreational
facilities which might have an
adverse physical effect on the
environment?
EIR Page

4.12-17
through

4.12-20
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
The 2017 EIR analyzes recreation in Section 4.12, Public Services and Recreation, and impacts are summarized above under Section 14, Public Services. The Comprehensive Plan EIR concludes that impacts regarding public services would be significant but mitigable with incorporation of mitigation measure PS-7, which would include new policies and programs addressing funding, community input, and environmental review for property acquisition and park construction/improvement.

PROJECT-SPECIFIC IMPACTS
a. 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?
b. 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? The City of Palo Alto has adopted a policy of 4 acres of neighborhood and district parkland for every 1,000 residents and a parkland dedication standard of 5 acres of parkland (including open space) for every 1,000 residents. Based on the existing 2022 population of 67,473 and the adopted parkland standard, Palo Alto should currently provide 269.9 acres of neighborhood Item 9
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132 | Page Addendum to the 2030 Comprehensive Plan EIR and district parkland.
12 There is an existing total of 173.4 acres of neighborhood and district parkland, 96.5 acres below the adopted policy.

The proposed HEU would increase the number of residential units by 919 compared to Scenario 6 of the 2017 EIR, and would therefore increase the demand for parks and recreational facilities and would require more acres of new parkland to meet the city’s requirement that new residential development provide 5 acres of parkland per 1,000 residents. As noted above, the city currently provides less parkland than required to meet its adopted policy for neighborhood and district parkland. Nonetheless, future development would be required to comply with Chapter 21.50 of the PAMC which outlines requirements for parkland dedication or in lieu fees payment, and the ongoing master planning effort for the parks, trails, and open space system would develop strategies for the addition and improvement of park land. Because the exact locations of future residential or parkland development are not known at this time, it would be speculative to assess the physical environmental impacts associated with the construction of future park facilities. However, given the need to new parkland under the proposed HEU, construction or expansion of new parks or recreation facilities would be expected and the impact would be potentially significant. However, future development would be required to comply with Policy N-1.13 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measure PS-7 of the 2017 EIR, which would address the potential physical impacts of park construction and improvement and reduce impacts to a less than significant level, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan.

Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not result in the substantial deterioration of existing neighborhood and regional parks. The proposed HEU could result in the construction or expansion of new parks or recreational facilities and this impact could be potentially significant. However, Policy N-1.13 adopted in compliance with Mitigation Measure PS-7 would reduce impacts to a less than significant level. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

12 67,473 (existing population) / 1,000 = 67.473 x 4 (number of acres per 1,000 residents of parkland) = 269.89 Item 9
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17 Transportation

4.13-38
through

4.13-48
No No No No
b. Conflict or be inconsistent with
CEQA Guidelines section
15064.3, subdivision (b)?
EIR Pages

4.13-18
through

4.13-30
No No No No
c. Substantially increase hazards
due to a geometric design
feature (e.g., sharp curves or
dangerous intersections) or
incompatible use (e.g., farm
equipment)?
EIR Pages

4.13-49
through

4.13-51
No No No No
d. Result in inadequate
emergency access?
EIR Pages

4.13-51
through

4.13-52
No No No No

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.13, Transportation and Traffic, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to traffic and the circulation system. The 2017 EIR analyzes transportation impacts using the level of service (LOS) methodology and found that impacts would be significant and unavoidable since there would be six intersections with a substandard LOS and there would be a significant impact during at least one of the peak hours. Although implementation of mitigation measures TRANS-1a through 1e would mitigate the projected impact to a less than significant level, Scenario 6 would still result in some impacted intersections, both because of growth in Palo Alto and regional growth. Therefore, the mitigation measures would reduce, but not eliminate, impacts at five of the six study intersections analyzed in the 2017 EIR. Additionally, the 2030 Comprehensive Plan was found to cause a freeway segment or ramp to drop below its level of service standard, or deteriorate operations that already operate at a substandard level of service since mitigation measures TRANS-1a and TRANS-3b would reduce but not eliminate the impact under Scenario 6 on four freeway segments. Although mitigation measures TRANS-3a and 3b would be required, impacts would remain significant and unavoidable. The 2017 EIR found that the 2030 Comprehensive Plan would not cause a roadway segment to drop below its level of service standard or deteriorate operations that already operate at a substandard level of service.

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TRANSPORTATION
134 | Page Addendum to the 2030 Comprehensive Plan EIR The 2017 EIR concluded that the 2030 Comprehensive Plan would not impede the function of planned bicycle or pedestrian facilities since compliance with existing City regulations and procedures would maintain existing and may improve the function of planned bicycle and pedestrian facilities. Furthermore, the 2030 Comprehensive Plan would not increase demand for pedestrian and bicycle facilities as well as transit services that cannot be met by existing or planned facilities or services. The 2030 Comprehensive Plan would also not result in inadequate emergency access and impacts would be less than significant.

The 2017 EIR determined that the 2030 Comprehensive Plan would create the potential demand for through traffic to use local residential streets and would create an operational safety hazard since growth under Scenario 6 could result in increased congestion, increasing the potential for drivers to divert onto local streets and therefore causing a potential for increase in accidents onto local streets. Therefore, mitigation measures TRANS-8 and TRANS-9 would be required to reduce impacts to a less than significant level.

Table 25 lists the 2017 EIR’s mitigation measures related to transportation. Pursuant to Public Resource Code, Section 21099 (b)(2), traffic congestion, while potentially an inconvenience to drivers, is not itself an environmental impact. Therefore, issues related solely to traffic congestion are outside the scope of CEQA analysis.

Table 25 2017 EIR Mitigation Measures: Transportation and Traffic Mitigation
Measure # Mitigation Measure Text
Impact TRANS-1: Implementation of the project would cause an intersection to drop below its motor vehicle level of service standard, or deteriorate operations at representative intersections that already operate at a substandard level of service. (Significant and Unavoidable)
TRANS-1a Adopt a programmatic approach to reducing traffic with the goal of achieving no net increase in peak period motor vehicle trips from new development, with an exception for uses that directly contribute to the neighborhood character and diversity of Palo Alto (such as ground floor retail and below market rate housing). The program should, at a minimum:
 Require new development projects to prepare and implement a Transportation Demand Management (TDM) Plan to achieve the following reduction in peak period motor vehicle trips from the rates included in the Institute of Transportation Engineers’ Trip Generation Manual for the appropriate land use category. These reductions are deemed aggressive, yet feasible, for the districts indicated.  45 percent reduction in the Downtown district
 35 percent reduction in the California Avenue area
 30 percent reduction in the Stanford Research Park
 30 percent reduction in the El Camino Real Corridor
 20 percent reduction in other areas of the city.

TDM Plans must be approved by the City and monitored by the property owner on an annual basis.

The Plans must contain enforcement mechanisms or penalties that accrue if targets are not met.  Require new development projects to pay a Transportation Impact Fee which will be partially used to reduce peak period motor vehicle trips citywide.

TRANS-1b Study the feasibility of unbundled parking for office, commercial and multi-family residential development (including senior housing developments) that are well-served by transit and demonstrated walking and biking connections, including senior housing developments.

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Mitigation
Measure # Mitigation Measure Text
TRANS-1c Include policies in the Comprehensive Plan to ensure collaboration with regional agencies and neighboring jurisdictions, and identification and pursuit of funding for rail corridor improvements and grade separation. Policies shall support grade separation of rail crossings along the rail corridor as a City priority and encourage studies and outreach necessary to advance grade separation of Caltrain to become a “shovel ready” project.

TRANS-1d Engage in regional transportation planning and advocate for specific transit improvements and investments, such as Caltrain service enhancements and grade separations, Dumbarton Express service, enhanced bus service on El Camino Real with queue jumping and curbside platforms, and additional VTA bus service.

TRANS-1e Encourage the PAUSD to analyze decisions regarding school assignments to reduce peak period motor vehicle trips to and from school sites.

Impact TRANS-3: Implementation of the project would cause a freeway segment or ramp to drop below its level of service standard, or deteriorate operations that already operate at a substandard level of service. (Significant and Unavoidable) TRANS-3a The City shall require new development projects to prepare and implement TDM programs, as described in TRANS-1a. TDM programs for worksites may include measures such as private bus services and free shuttle services to transit stations geared towards commuters.

TRANS-3b Include policies in the Comprehensive Plan that advocate for efforts by Caltrans and the Valley Transportation Authority to reduce congestion and improve traffic flow on existing area freeway facilities consistent with Statewide GHG emissions reduction initiatives.

Policies shall support the application of emerging freeway information, monitoring, and control systems that provide non-intrusive driver assistance and reduce congestion.

Policies shall support, where appropriate, the conversion of existing traffic lanes to exclusive bus and high-occupancy vehicle (HOV) lanes on freeways and expressways, including the Dumbarton Bridge, and the continuation of an HOV lane from Redwood City to San Francisco.

Impact TRANS-8: Implementation of the project would create the potential demand for through traffic to use local residential streets. (Significant and Mitigable)
TRANS-8 Include policies in the Comprehensive Plan to identify specific improvements that can be used to discourage non-local drivers from using local, neighborhood streets to bypass traffic congestion on arterials.

Impact TRANS-9: Implementation of the project would create an operational safety hazard. (Significant and Mitigable) TRANS-9 Implement Mitigation Measure TRANS-8.

Source: City of Palo Alto 2016

REGULATORY SETTING
SENATE BILL 743 AND VEHICLE MILES TRAVELED
Senate Bill (SB) 743 was signed into law by Governor Brown in 2013 and directed the State Office of Planning and Research (OPR) to establish new criteria for determining the significance of transportation impacts under the California Environmental Quality Act (CEQA). SB 743 requires the new criteria to “promote the reduction of greenhouse gas emissions, the development of multimodal transportation networks, and a diversity of land uses.” It also states that alternative measures of transportation impacts may include “vehicle miles traveled, vehicle miles traveled per capita, automobile trip generation rates, or automobile trips generated.” In January 2018, OPR transmitted its proposed CEQA Guidelines implementing SB 743 to the California Natural Resources Agency for adoption, and in January 2019 the Natural Resources Item 9
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TRANSPORTATION
136 | Page Addendum to the 2030 Comprehensive Plan EIR Agency finalized SB 743 updates to the CEQA Guidelines. SB 743 changed the way that public agencies evaluate the transportation impacts of projects under CEQA, recognizing that roadway congestion, while an inconvenience to drivers, is not itself an environmental impact (Public Resource Code, § 21099 (b)(2)). In addition to new exemptions for projects consistent with specific plans, the CEQA Guidelines replaced congestion-based metrics, such as auto delay and level of service (LOS), with VMT as the basis for determining significant impacts, unless the Guidelines provide specific exceptions.

The 2017 EIR examined program-level transportation impacts using the level of service (LOS) methodology and found that all such impacts would be significant and unavoidable. Although the 2017 EIR analyzes VMT, VMT was not the basis for a standard of significance used and no impact finding regarding VMT was made. Nonetheless, Scenario 6 was found to result in the lowest VMT per capita (including employment and residential VMT) of 30.8 compared to other scenarios. This can be attributed to a more balanced jobs-housing ratio where job growth is more proportional to residential growth; placing more residents in proximity to alternative modes of transportation and promoting bicycling and walking; and implementing the Bus Rapid Transit (BRT) on El Camino Real with queue-jumping lanes and signal prioritization at intersections.

PROJECT-SPECIFIC IMPACTS
This analysis is based upon the VMT Analysis prepared for the HEU by Hexagon Transportation Consultants, Inc. (Hexagon) in January 2023 (Appendix A).

IMPACT ANALYSIS
a. Would the project conflict with a program, plan, ordinance or policy addressing the circulation system, including transit, roadway, bicycle and pedestrian facilities? The 2017 EIR used level of service (LOS) as its performance criteria while analyzing the city’s roadway system. However, to implement SB 743, the CEQA Guidelines have been updated to change the criteria for determining what constitutes a significant traffic related environmental impact to rely upon quantification of VMT instead of LOS. The proposed HEU would be consistent with the Transportation Element of the 2030 Comprehensive Plan since it would place housing near transit, services, and jobs, which would reduce the usage of single- occupancy vehicles and encourage walking, bicycling, and using alternative modes of transportation.

Bicycling would be encouraged through the Bicycle and Pedestrian Transportation Plan which aims to improve bicycling and pedestrian conditions and increase bicycling and walking rates within Palo Alto (City of Palo Alto 2012). Future residents would be able to benefit from goals, policies, and improvements associated with the Bicycle and Pedestrian Transportation Plan which would reduce VMT and reliance on single-occupancy vehicles.

Future development proposals for individual projects would be subject to adopted development guidelines, including standards that govern VMT, transportation, GHG, and Item 9
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associated issues. Impacts identified for development facilitated by the plan would be addressed through the project approval process, including Planning and Transportation Commission (PTC) review as well as design review specific to potential impacts of that project.

Because the proposed HEU does not include modifications to the existing transportation network and individual future developments must be designed consistent with applicable bicycle and pedestrian facility requirements, the proposed HEU would not conflict with the City’s existing circulation, bicycle, or pedestrian plans. Impacts to transit, roadway, bicycle, and pedestrian facilities would be less than significant, and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
b. Would the project conflict or be inconsistent with CEQA Guidelines section 15064.3, subdivision (b)?

CEQA Guidelines Section 15064.3(b) requires specific consideration of a plan or project’s transportation impacts based on VMT. This implements SB 743, which eliminates level of service as a basis for determining significant transportation impacts under CEQA and requires a different performance metric: VMT. With this change, the State shifted the focus from measuring a plan or project’s impact upon drivers (LOS) to measuring the impact of driving (VMT) on achieving its goals of reducing GHG emissions, encouraging infill development, and improving public health through active transportation.

Hexagon Transportation Consultants, Inc. prepared a VMT Analysis (Appendix A) for the proposed HEU to determine whether it would generate a significant VMT impact. The City adopted a VMT threshold for residential projects on June 15, 2020. A residential project that exceeds a level of 15 percent below existing (baseline) County home-based VMT per resident may indicate a significant transportation impact.

The City of Palo Alto Travel Forecasting Model (PA model) was used to estimate VMT for the proposed project. According to the PA model, the countywide average VMT per resident for residential development is 12.90 miles. Based on the Palo Alto VMT Criteria, a project generating a VMT that is 15 percent or more below this value, or 10.97 daily vehicle miles per resident, would have a less-than-significant VMT impact. Based on the results of the PA model, as shown in Table 26, the project would have a projected VMT rate of 9.25 miles per resident, lower than the significance threshold of 10.97 miles, since the proposed project would concentrate new residential units in urbanized areas in proximity to transit, jobs, and services compared to other parts of the County. Therefore, this impact would be less than significant, and further analysis is not warranted.

Table 26 Vehicle Miles Traveled Analysis Summary
VMT Metric
Baseline
VMT Rate
Significance
Threshold
Project
VMT Rate Resulting Significance
VMT per resident (Countywide baseline) 12.90 10.97 9.25 Less than significant Sources: Hexagon Transportation Consultants, Inc 2023; Appendix A Item 9
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TRANSPORTATION
138 | Page Addendum to the 2030 Comprehensive Plan EIR c. Would the project substantially increase hazards due to a geometric design feature (e.g., sharp curves or dangerous intersections) or incompatible use (e.g., farm equipment)? In the absence of specific project applications to review, analyzing impacts based on project design features would be wholly speculative. CEQA does not require public agencies to speculate. Adoption of the proposed HEU analyzes the amount of new housing units the City will accommodate during the 2023-2031 planning period and sets goals and policies for how this housing is implemented. It does not grant entitlements for any specific project or future development. Thus, the plan for new housing and the goals and policies needed to achieve that housing do not have a specific transportation safety impact or hazard. The proposed project would not include hazardous geometric design features or incompatible uses. Each housing application would be evaluated at the project specific level and undergo design review which would ensure design features would be in accordance with all applicable City standards to minimize design hazards. Furthermore, future projects facilitated would be infill projects or would include increasing density and height of existing sites, and therefore would not involve the creation of new roadways or intersections or incompatible uses within Palo Alto.

While new
intersections of existing local streets with proposed new streets internal to these sites may be created if these sites would be developed, they would be subject to the project-level review processes described above to ensure hazards from design features or incompatible uses are not created. Therefore, impacts from hazardous design features or incompatible uses would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan as analyzed in the 2017 EIR. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
d. Would the project result in inadequate emergency access? Similar to Scenario 6 as discussed in the 2017 EIR, traffic increases would contribute to congestion on freeway segments, which could contribute to cumulative traffic conditions that have the potential to impede emergency vehicle access on US 101. However, isolated instances of emergency vehicles being impeded vary on a case-by-case basis and more information would be needed to determine the precise problem causing a particular event. It would be speculative to try to determine how future traffic associated with development in Palo Alto would cumulatively contribute to such events. In addition, approximately 15 percent of the traffic signals maintained by the City of Palo Alto are equipped with emergency vehicle preemption devices. The city will continue to install traffic signal preemption devices where appropriate.

Emergency vehicles have the right to use lights and sirens to allow them to bypass congestion, and all other vehicles are required by State law to pull over to allow emergency vehicles to pass. Additionally, future development would be required to comply with comply with basic building designs and standards for residential buildings as mandated by the Palo Alto Fire Code pursuant to PAMC Chapter 15.04. Future projects would be required to incorporate all applicable design and safety requirements as set forth in the most current adopted building codes and fire and life safety standards. Additionally, as discussed under Section 9, Hazards and Hazardous Materials, the proposed HEU would not impair implementation of or physically Item 9
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interfere with an adopted emergency response plan or emergency evacuation plan. Therefore, impacts would be less than significant and would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan as analyzed in the 2017 EIR. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not conflict with a program, plan, ordinance or policy addressing the circulation system; result in a significant VMT impact; substantially increase hazards due to a geometric design feature or incompatible use; or result in inadequate emergency access. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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18 Tribal Cultural Resources

Where was
Impact
Analyzed in
the EIR?
Could
Proposed
Changes
Involve New or
Substantially
More Severe
Impacts?
Do New
Circumstances
Result in New
or Substantially
More Severe
Impacts?
Does New
Information
Result in New
or Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address
and/or
Resolve
Impacts?
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:
a. 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)?
EIR Pages

4.4-2
through

4.4-5
No No No Yes
b. 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 (c) of Public
Resources Code Section 5024.1?
EIR Pages

4.4-7
through

4.4-9
No No No Yes

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
The 2017 EIR does not specifically discuss impacts to tribal cultural resources or compliance with Assembly Bill 52 (AB 52), which was signed into law in 2014. AB 52 expanded CEQA by defining a new resource category, “tribal cultural resources,” and requires lead agencies to complete consultation with California Native American Tribes regarding proposed projects, because it became effective after the issuance of the Notice of Preparation for 2017 EIR.

However, as described in Section 5, Cultural Resources, of this Addendum, the 2017 EIR incorporated required mitigation measures CULT-1 and CULT-3 for procedures in the event archaeological resources, tribal resources, and human remains are discovered during construction.

ASSEMBLY BILL 52 OF 2014
AB 52 establishes that “A project with an effect that may cause a substantial adverse change in the significance of a tribal cultural resource is a project that may have a significant effect on the environment” (PRC Section 21084.2). It further states that the lead agency shall establish measures to avoid impacts that would alter the significant characteristics of a tribal cultural resource, when feasible (PRC Section 21084.3).

PRC Section 21074 (a)(1)(A) and (B) defines tribal cultural resources as “sites, features, places, cultural landscapes, sacred places, and objects with cultural value to a California Native American tribe” and are:

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142 | Page Addendum to the 2030 Comprehensive Plan EIR

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), or

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 (c) of Public Resources Code Section 5024.1. In applying these criteria, the lead agency shall consider the significance of the resource to a California Native American tribe.

AB 52 also establishes a formal consultation process for California tribes regarding those resources. The consultation process must be completed before a CEQA document can be certified. Under AB 52, lead agencies are required to “begin consultation with a California Native American tribe that is traditionally and culturally affiliated with the geographic area of the proposed project.” Native American tribes to be included in the process are those that have requested notice of projects proposed within the jurisdiction of the lead agency.

The requirements of AB 52 do not apply to the proposed project because it falls under a previously certified EIR. Nonetheless, the City of Palo Alto conducted tribal consultation in accordance with AB 52 as well as in accordance with Senate Bill 18. The City sent out letters via certified mail on September 29, 2022, to the following eight Native American Tribes that that were identified by the NAHC as being traditionally and culturally affiliated with the geographic area:
 Amah Mutsun Tribal Band
 Amah Mutsun Tribal Band of Mission San Juan Bautista
 Indian Canyon Mutsun Band of Costanoan
 Muwekma Ohlone Indian Tribe of the SF Bay Area
 Northern Valley Yokuts Tribe
 The Ohlone Indian Tribe
 Wuksache Indian Tribe/Eshom Valley Band
 Tamien Nation
Under AB 52, Native American tribes typically have 30 days to respond and request further project information and formal consultation. Under SB 18, Native American tribes have 90 days to respond and request further project information and request formal consultation. To date, the City of Palo Alto has not received responses requesting consultation under AB 52 or SB 18 from the Tribes. AB 52 and SB 18 correspondence is included in Appendix C.

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IMPACT ANALYSIS
a. Would the project cause a substantial adverse change in the significance of a tribal cultural resource as defined in Public Resources Code Section 21074 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)? b. Would the project cause a substantial adverse change in the significance of a tribal cultural resource as defined in Public Resources Code 21074 that is 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 (c) of Public Resources Code Section 5024.1? No specific tribal cultural resources were identified in the City of Palo Alto as a result of consultation with the Tribes. Similar to what was assumed in the 2017 EIR, although development under the proposed HEU would occur on non-vacant and underutilized sites in previously disturbed areas, ground-disturbing activities such as earthmoving and excavation could still potentially damage and/or destroy unrecorded tribal cultural resources in subsurface soils within the housing sites. Adherence to the requirements of AB 52 would require Tribal consultation with local California Native American Tribes prior to implementation of project activities subject to CEQA. AB 168 would require Tribal consultation with local California Native American Tribes prior to implementation of project activities subject to SB 35. In compliance with AB 52, a determination of whether project-specific substantial adverse effects on tribal cultural resources would occur along with identification of appropriate project-specific avoidance, minimization, or mitigation measures would be required. Due to the programmatic nature of the proposed HEU it is not possible to fully determine impacts of specific projects on specific sites; however, no tribal cultural resources were identified during consultation. Future projects subject to CEQA and SB 35 would require project-specific tribal cultural resource identification and consultation, and the appropriate avoidance, minimization, or mitigation would be incorporated. Project-specific tribal cultural resource consultation will occur when specific projects are implemented, and consultation conducted pursuant to the requirements of AB 52. Future development would also be required to comply with policies L-7.16 through 7.18 of the 2030 Comprehensive Plan, adopted in compliance with Mitigation Measure CULT-3 of the 2017 EIR, which would reduce impacts on tribal cultural resources to a less than significant level. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, development would occur in the same areas as those analyzed in the 2017 EIR. Further, future development would be required to comply with federal, State, and local regulations pertaining to tribal cultural resources as well as policies adopted in compliance with Mitigation Measure CULT-3 from the 2017 EIR, which would reduce impacts to a less than significant level. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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19 Utilities and Service Systems

Where was
Impact
Analyzed in
the EIR?
Could Proposed
Changes
Involve New or
Substantially
More Severe
Impacts?
Do New
Circumstances
Result in New
or Substantially
More Severe
Impacts?
Does New
Information
Result in New
or Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address
and/or
Resolve
Impacts?
Would the project:
a. Require or result in the
relocation or construction of
new or expanded water,
wastewater treatment or
storm water drainage,
electric power, natural gas, or
telecommunications facilities,
the construction or relocation
of which could cause
significant environmental
effects?
EIR Pages

4.14-2
through

4.14-7; 4.14-
14 through

4.14-15;

4.14-18
through

4.14-19;

4.14-25
through

4.14-28;

4.14-33
through

4.14-38
No No No N/A
b. Have sufficient water supplies
available to serve the project
and reasonably foreseeable
future development during
normal, dry and multiple dry
years?
EIR Pages

4.14-2
through

4.14-4
No No No N/A
c. Result in a determination by
the wastewater treatment
provider which serves or may
serve the project that it has
adequate capacity to serve
the project’s projected
demand in addition to the
provider’s existing
commitments?
EIR Pages

4.14-10
through

4.14-16
No No No N/A
d. 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?
EIR Pages

4.14-25
through

4.14-28
No No No N/A
e. Comply with federal, state,
and local management and
reduction statutes and
regulations related to solid
waste?
EIR Pages

4.14-28
through

4.14-30
No No No N/A
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ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
Section 4.14, Utilities and Service Systems, of the 2017 EIR analyzed the 2030 Comprehensive Plan’s impacts related to utilities and service systems. The 2017 EIR found that sufficient water supplies from existing entitlements would be available to serve Scenario 6 and the increased demand in water would not result in the substantial physical deterioration of a water utility facility. Additionally, the 2030 Comprehensive Plan would not prompt a need to expand treatment facilities or regional water system conveyance and storage facilities in order to meet its demand. New or expanded local water distribution facilities would require permitting and review in accordance with CEQA, which would ensure environmental impacts are disclosed and mitigated. Therefore, impacts would be less than significant.

The 2017 EIR determined that the 2030 Comprehensive Plan would not exceed wastewater treatment requirements of the RWQCB or wastewater treatment capacity of the Regional Water Quality Control Plant (RWQCP). Furthermore, the 2030 Comprehensive Plan would not result in substantial physical deterioration of the RWQCP or adverse physical impacts from new or expanded wastewater utility facilities since the existing RWQCP would provide adequate capacity to meet dry weather and maximum month flows through at least 2035 and beyond.

Therefore, impacts would be less than significant.

The 2017 EIR found that the 2030 Comprehensive Plan would not require or result in the construction of new stormwater facilities or expansion of existing facilities since development would be required to comply with Provision C.3 of the MRP, as well as the City’s post- construction site design measures, source control measures, and stormwater treatment measures. The 2030 Comprehensive Plan would not result in a substantial physical deterioration of stormwater facilities with compliance with existing State, regional, and local regulations. Therefore, impacts would be less than significant.

The 2017 EIR determined that the 2030 Comprehensive Plan would be served by 17 different landfills with sufficient permitted capacity to accommodate the increased waste disposal needs.

However, the 2017 EIR found that the 2030 Comprehensive Plan could potentially fall out of compliance with federal, State, and local statutes and regulations related to solid waste, and mitigation measure UTIL-15 would be required to reduce impacts to a less than significant level.

The 2017 EIR also analyzes impacts to energy supply and efficiency which is discussed in Section 6, Energy, of this document.

Table 27 lists the mitigation measures from the 2017 EIR related to utilities and service systems.

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Table 27 2017 EIR Mitigation Measures: Utilities and Service Systems Mitigation
Measure # Mitigation Text
Impact UTIL-15: Without the adoption of policies to promote recycling and conservation, the proposed Plan could potentially fall out of compliance with federal, State, and local statutes and regulations related to solid waste. (Potentially Significant and Mitigable)
UTIL-15 To ensure that future development under Scenarios 2, 3, and 4 would comply with applicable solid waste regulations, the proposed Plan shall include policies that address the following topics:
 Substantial landfill diversion by 2030, and ultimately zero waste.  Reduced solid waste generation.
 Use of reusable, returnable, recyclable, and repairable goods.  Enhanced recycling and composting programs for all waste generators.

Source: City of Palo Alto 2016

PROJECT-SPECIFIC IMPACTS
a. Would the project require or result in the relocation or construction of new or expanded water, wastewater treatment or storm water drainage, electric power, natural gas, or telecommunications facilities, the construction or relocation of which could cause significant environmental effects?
WATER
As discussed under Threshold Question (b) below, water supply and demand for the proposed HEU would be similar to that of Scenario 6 of the 2017 EIR. The City receives 100 percent of its potable water from the SFPUC. The City does not own or operate a water treatment plant (WTP). The water purchased from the SFPUC may be treated at one or more WTPs operated by SFPUC. SFPUC treats water to meet all applicable drinking water standards. SFPUC periodically makes improvements to its WTPs in order to improve system reliability and accommodate projected growth in its regional service areas. For example, the Water System Improvement Program (WSIP) includes capacity expansion and other improvements in order to upgrade SFPUC’s regional and local water systems. The WSIP also includes many projects to improve the Regional Water System distribution lines and storage reservoirs (City of Palo Alto 2017a).

Although existing local distribution lines within the city could potentially be undersized for future projects and improvements under the proposed HEU could require replacement with larger diameter pipes, potential environmental impacts that could result from pipeline improvements would be project specific. New or expanded local water distribution facilities would require permitting and review in accordance with CEQA, which would ensure environmental impacts are disclosed and addressed in the environmental analysis. Therefore, similar to Scenario 6, the proposed HEU would not result in the expansion or construction of new treatment facilities or regional water system conveyance and storage facilities in order to meet its demand and this impact would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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148 | Page Addendum to the 2030 Comprehensive Plan EIR

WASTEWATER
As discussed under Threshold Question (c), the existing RWQCP facilities would provide adequate capacity to meet dry weather and maximum month flows through at least 2035 and beyond, and that new or expanded facilities would not be needed as a result of the proposed HEU. Some aging facilities will need to be replaced, based on the treatment processes design criteria and historical performance. However, these facility upgrades and replacements are anticipated based on existing planning documents and would not be necessitated as a result of the proposed HEU. In addition, the LRFP anticipates that the existing RWQCP facilities will provide adequate capacity to meet dry weather and maximum month flows through at least 2035, assuming the same level of treatment is required. Therefore, similar to Scenario 6, the proposed HEU would not result in the expansion or construction of new wastewater facilities and this impact would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

STORMWATER
Although the proposed HEU would increase the number of residential units by 919 compared to Scenario 6 of the 2017 EIR, new future development would be required to comply with the C.3 provisions of the MRP and implement BMPs and LID features to minimize stormwater runoff impacts. In particular, during construction, future projects would be required to implement flow control BMPs to minimize potential impacts. Similar to Scenario 6, the proposed HEU does not propose the conversion of open space areas, creeks, or wetlands to impervious surfaces and would not alter the course of a stream or river. The City’s Department of Public Works requires all new development projects to provide storm drain flow and detention calculations, including pre-project and post-project conditions and flow rates. On-site stormwater detention is also required as per the C.3 provisions of the MRP. In addition, per section C.3.j, future applicants would be required to complete and implement a Green Infrastructure Plan for the inclusion of low impact development drainage design into storm drain infrastructure on public and private lands, including streets, roads, storm drains, parking lots, building roofs, and other storm drain infrastructure elements (City of Palo Alto 2017a). Compliance with State and local stormwater regulations would reduce impacts to a less than significant level, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

TELECOMMUNICATIONS
The proposed HEU would require connections to existing adjacent utility infrastructure to meet the needs of future residents. Similar to Scenario 6 of the 2017 EIR, the proposed HEU would only facilitate development on non-vacant and underutilized sites in urbanized areas. Based on the availability of existing telecommunications infrastructure, construction of new telephone and cable lines would not be required, and all future development would be able to connect to Item 9
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existing infrastructure. Development facilitated by the project would be required to adhere to applicable laws and regulations related to the connection to existing telecommunication infrastructure. Therefore, there would be adequate telecommunications facilities to serve the development facilitated by the project, and impacts would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

ELECTRICITY AND NATURAL GAS
As discussed in the 2017 EIR, Scenario 6 would result in a long-term increase in electrical service energy demand ranging from 10 percent to 11 percent over 2014 baseline levels within the CPAU’s service territory for electrical service. This average incremental increase in electrical service demand would be less than a one percent increase per year. Although the proposed HEU would increase the number of residential units by 919 compared to Scenario 6 of the 2017 EIR, it would not include non-residential uses and therefore electricity demand would be similar to that of Scenario 6 and would result in less than a one percent increase per year. Since the proposed HEU would also facilitate development in non-vacant and underutilized sites with existing infrastructure, it is not anticipated that the construction of new electrical transmission and distribution lines would be required. Therefore, the proposed HEU would not result in the relocation or construction of new or expanded electrical facilities and impacts would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

Similarly, for the same reasons described above, the proposed HEU would not substantially increase natural gas demand compared to Scenario 6 and future development would also be subject to the City’s most updated Reach Code and All-Electric Mandate which requires all- electric building design for single-family, low-rise multi-family, and non-residential development (City of Palo Alto 2022a). Therefore, the proposed HEU would not result in the relocation or construction of new or expanded natural gas facilities and impacts would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted. b. Would the project have sufficient water supplies available to serve the project and reasonably foreseeable future development during normal, dry and multiple dry years? As discussed in the 2017 EIR, the increased water demand for Scenario 6 would be approximately 11,132 acre-feet per year (AFY) by 2030, and the city’s Individual Supply Guarantee would be 19,118 AFY by 2030. As shown on Table 28, the additional 919 units facilitated by the proposed HEU compared to the 2017 EIR would increase water demand by approximately 59,735 gallons per day (gpd) or 70.0 acre-feet per year (AFY) in 2031 assuming full buildout. According to the city’s 2020 Urban Water Management Plan (UWMP), by 2030, the city would have a water demand of 11,394 AFY and an Individual Supply Guarantee of 18,579 AFY. Therefore, the proposed project would increase Palo Alto’s estimated 2030 normal- Item 9
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150 | Page Addendum to the 2030 Comprehensive Plan EIR year water demand by approximately 0.6 percent, which would not exceed the City’s individual supply guarantee, even with the adjustment to the supply guarantee as outlined in the UWMP, and there would be sufficient water supply to accommodate the proposed project.

Table 28 Estimated Water Use for the Proposed HEU
Potential Buildout
Development/Land Use
Water Generation
Factor (gpd/unit) 1
Projected Number
of Housing Units
Projected Water
Demand in 2031 (gpd)
Projected Water
Demand in 2031 (AFY)
Multi-family residential 65 919 59,735 70.0
1 Per unit water demand factors from Palo Alto are not available, therefore, this analysis is based water use factors provided by the East Bay Municipal Utilities District, 65 gpd/unit for a low-rise apartment. gpd =gallons per day. AFY = acre-feet per year
According to the city’s 2020 UWMP, the City of Palo Alto analyzed three different hydrological conditions to determine the reliability of water supplies for the City: average/normal water year, single dry water year, and multiple dry water year period. In each of the three hydrological conditions, the projected water demand was calculated taking into account growth in billing data, water conservation efforts, and demographics. The UWMP states that the City of Palo Alto can reliably meet the projected water demand in normal years. However, there would be a potable water supply shortfall for single dry year and multiple dry years. Under these conditions, residents would be required to reduce water usage by 30 to 50 percent depending on the length of the dry year. The San Francisco Public Utilities Commission (SFPUC) and Bay Area Water Supply and Conservation Agency (BAWSCA) are also evaluating alternative water supplies during and seeking water supplies and solutions for drought years. In addition, the City of Palo Alto has formed partnerships such as the one with Valley Water and is embarking on a One Water plan which will have dry year water supply reliability as a central tenet (City of Palo Alto 2021). The City of Palo Alto also offers many resources to help residents use water wisely, including free water surveys, conservation devices, educational programs, and rebates for appliance or landscape upgrades (City of Palo Alto 2017a). The City presents drought updates to the Utilities Advisory Commission monthly and has held numerous public meetings to update the community on the drought, responses by the State and the City, and available resources.

Therefore, sufficient water supplies would be available to serve the proposed HEU during normal, single- and multiple-dry years, and impacts would be less than significant, generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
c. Would the project result in a determination by the wastewater treatment provider which serves or may serve the project that it has adequate capacity to serve the project’s projected demand in addition to the provider’s existing commitments? As discussed in the 2017 EIR, Scenario 6 would increase wastewater generation by 631,032 gallons per day (GPD) and this estimated worst-case increase in water flow would represent less than four percent of the existing excess dry flow capacity of 18 million gallons per day (MGD) available at the RWQCP. The Long Range Facilities Plan (LRFP) also further estimates that Item 9
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the RWQCP would have at least 5 MGD of excess capacity in 2062. Assuming that wastewater generation is 80 percent of water use, the proposed HEU would increase wastewater generation by approximately 47,788 gpd.
13 This would constitute approximately 0.3 percent of
the RWQCP’s excess dry flow capacity and therefore the RWQCP would have sufficient capacity to accommodate the 919 additional units proposed under the HEU. Although some aging facilities will need to be replaced, based on the treatment processes design criteria and historical performance, the LRFP anticipates that the existing RWQCP facilities would l provide adequate capacity to meet dry weather and maximum month flows through at least 2035, assuming the same level of treatment is required. Projected dry weather flows are anticipated to be between 28 and 34 MGD in the year 2062, which is below the dry weather flow design capacity of the plant (39 MGD). Therefore, the RWQCP’s existing capacity would be sufficient to accommodate the anticipated residential development under the proposed HEU. Development facilitated by the proposed project would not result in the need to expand the capacity of the RWQCP. This impact would be less than significant and generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.
d. Would the project 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?
e. Would the project comply with federal, state, and local management and reduction statutes and regulations related to solid waste?
As discussed in the 2017 EIR, Scenario 6 would generate an approximate increase of 15,315 tons per year of solid waste over baseline at buildout. Additionally, the city’s disposal rate per resident in 2014 was 3.6 pounds per day (PPD), which was below the CalRecycle target of 7.1 PPD per resident. The city’s disposal rates for both residents and employees have been below target rates since 2007 (City of Palo Alto 2017a).

CalRecycle estimates that multi-family residential uses generate an average of four pounds of solid waste per unit per day (CalRecycle 2023). As shown in Table 29, prior to implementation of State-mandated diversion requirements, development associated with the proposed HEU would generate an estimated 3,676 pounds per day of solid waste, which equates to 1.8 tons or

16.3 cubic yards per day. In accordance with California’s Integrated Waste Management Act of 1989 (AB 939), cities and counties are required to divert 50 percent of all solid wastes from landfills. Additionally, pursuant to AB 341 adopted in 2012, all businesses that generate four cubic yards or more of commercial solid waste per week including multi-family dwelling that consists of five units or more would be required to divert 75 percent of all solid wastes. The City of Palo Alto has achieved a diversion rate of 82 percent, which substantially exceeds AB 939 State requirement (City of Palo Alto 2018). Assuming that this diversion rate continues to apply

13 59,735 gpd times 0.8 = 47,788 gpd
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152 | Page Addendum to the 2030 Comprehensive Plan EIR to new development on the project sites, implementation of the project would generate approximately 0.3 tons or 2.9 cubic yards per day of solid waste for disposal at landfills.

Table 29 Estimated Solid Waste Generation
Potential Buildout
Development/
Land Use Quantity Units Generation Rate1
Solid Waste
(pounds per day)
Solid Waste
(tons per day)
Solid Waste
(cubic yards
per day)2
Residential 919 dwelling
units
4 pounds/unit/day 3,676 1.8 16.3
Total Assuming 82% Diversion Rate 662 0.3 2.9
1 CalRecycle 2023
2 RecycleMania/USEPA 2022, assumes 225 pounds per cubic yard of residential waste In 2019, CalRecycle reported that the overall total of 47,023 tons of solid waste from Palo Alto was disposed at 17 different landfills. The majority (42,252 tons) were disposed at three landfills: Kirby Canyon Landfill, Corinda Los Trancos Landfill (Ox Mountain), and Monterey Peninsula Landfill (CalRecycle 2022). The Kirby Canyon Landfill has a closure year of 2059 and a remaining capacity of 16,191,600 cubic yards (CalRecycle 2022b); the Ox Mountain Landfill has a closure year of 2034 and a remaining capacity of 22,180,000 cy (CalRecycle 2022c); and the Monterey Peninsula Landfill has a closure year of 2107 and a remaining capacity of 48,560,000 cy (CalRecycle 2022d). With development facilitated by the proposed HEU, it is estimated that the 919 units would generate approximately 2.9 cubic yards of solid waste per day, or 1,059 cubic yards of solid waste per year for disposal at landfills. This represents 0.007 percent of the current total remaining landfill capacity at the Kirby Canyon Landfill. The projected closure years and remaining capacities of these three main landfills currently accepting solid waste from the city would be able to accommodate the projected increase in solid waste under Scenario 6 and the proposed HEU. There are also 14 more landfills that received waste from Palo Alto in 2019. If one or more of these landfills were unavailable in the future, it is likely Palo Alto’s solid waste volume could be increased at one or more of the other landfills that already serve Palo Alto. Moreover, the city has ongoing and planned measures to divert increasing amounts of Palo Alto’s solid waste away from landfills. Future development would be required to comply with PAMC Section 16.14.260 which requires an 80 percent diversion of construction and demolition debris, and preparation of a Waste Management Plan for on-site sorting of construction debris, which is submitted to the City for approval, in order to ensure that the covered project meets the diversion requirement for reused or recycled construction and demolition debris. Development facilitated by the proposed HEU would also be required to comply with applicable federal, State, and local statutes and regulations related to solid waste such as AB 939, which requires the City to divert 50 percent of solid waste from landfills, as well as SB 1838, which would require mandatory organic waste recycling for future residents.

Furthermore, future development would be required to comply with policies S-3.8, 3.9, and

3.11 of the 2030 Comprehensive EIR, adopted in compliance with Mitigation Measure UTIL-15 of the 2017 EIR, which would ensure waste diversion and increased recycling. Therefore, the existing landfills would be able to accommodate development under the proposed HEU, and the proposed HEU would comply with federal, State, and local regulations related to solid Item 9
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wastes. Impacts would be less than significant with mitigation and generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not result in the construction or expansion of utilities facilities, and existing infrastructure would be sufficient to accommodate the increased residential units. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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20 Wildfire

Where was
Impact
Analyzed in
the EIR?
Could Proposed
Changes
Involve New or
Substantially
More Severe
Impacts?
Do New
Circumstances
Result in New
or Substantially
More Severe
Impacts?
Does New
Information
Result in New
or Substantially
More Severe
Significant
Impacts?
Do 2017 EIR
Mitigation
Measures
Address
and/or
Resolve
Impacts?
If located in or near state responsibility areas or lands classified as very high fire hazard severity zones, would the project:
a. Substantially impair an
adopted emergency response
plan or emergency evacuation
plan?
N/A No No No N/A
b. 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?
EIR Pages

4.7-8
through

4.7-9
No No No N/A
c. 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?
N/A No No No N/A
d. Expose people or structures to
significant risks, including
downslopes or downstream
flooding or landslides, as a
result of runoff, post-fire slope
instability, or drainage
changes?
EIR Pages

4.7-8
through

4.7-9
No No No N/A

ANALYSIS IN PREVIOUS ENVIRONMENTAL DOCUMENTS
The 2017 EIR does not directly address the issue area of wildfire, but discusses wildfire impacts in Section 4.7, Hazards and Hazardous Materials, of the 2017 EIR. As discussed in the 2017 EIR, much of the area surrounding Palo Alto west of I-280 is considered to have a moderate and high risk of wildland fire, whereas all of the urbanized areas of Palo Alto do not have any wildland fire hazards. The 2017 EIR found that there would be less than significant impacts related to wildfire.

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156 | Page Addendum to the 2030 Comprehensive Plan EIR

IMPACT ANALYSIS
a. If located in or near state responsibility areas or lands classified as very high fire hazard severity zones, would the project substantially impair an adopted emergency response plan or emergency evacuation plan?
b. If located in or near state responsibility areas or lands classified as very high fire hazard severity zones, would the project, 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? c. If located in or near state responsibility areas or lands classified as very high fire hazard severity zones, would the project 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?
d. If located in or near state responsibility areas or lands classified as very high fire hazard severity zones, would the project expose people or structures to significant risks, including downslopes or downstream flooding or landslides, as a result of runoff, post-fire slope instability, or drainage changes?
As shown in the CAL FIRE Fire Hazard Severity Zone Map, only the area west of I-280 is located in a High Fire Hazard Severity Zone (HFHSZ) while the rest of the city east of I-280 is located in an area with low wildfire risk. Similar to what was analyzed in the 2017 EIR, the proposed HEU would facilitate development in non-vacant and underutilized sites in urbanized areas of the city east of I-280, and would not facilitate development in locations near the HFHSZ. New development would also be located in proximity to Fire Stations 1, 2, 3, and 4 which would protect future residents from wildfire hazards. Additionally, future development would be required to comply with the CAL FIRE Strategic Plan and the CFC pursuant to PAMC Chapter

15.04. The CFC requires the clearance of debris and vegetation within a prescribed distance from structures in wildlife hazard areas. The proposed HEU would facilitate residential development primarily on infill sites in urbanized areas, and would not require the construction of additional roads, power lines, or other utilities that would exacerbate existing fire risk.

Housing sites that require utility connections would likely install underground connections, and development within underground utility districts would be required to install new utility connections underground. Therefore, the project would not impair an adopted emergency response or evacuation plan related to wildfire; exacerbate wildfire risks; or expose people to post-fire risks related to runoff, flooding, or landslides. Impacts would be less than significant and generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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CONCLUSION
Although the proposed HEU would facilitate the development of 919 more residential units than analyzed under the 2017 EIR, future development would not impair an adopted emergency response or evacuation plan related to wildfire; exacerbate wildfire risks; or expose people to post-fire risks related to runoff, flooding, or landslides. Therefore, the project would not result in new significant effects not addressed in the prior EIR, and no new mitigation measures are warranted. This issue does not require further study in an EIR.

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21 Cumulative Impacts
CEQA defines “cumulative impacts” as two or more individual impacts that, when considered together, are substantial or will compound other environmental impacts. Cumulative impacts are the combined changes in the environment that result from the incremental impact of development of the proposed project and other nearby projects. For example, noise impacts of two nearby projects may be less than significant when analyzed separately but could have a significant impact when analyzed together. Cumulative impact analysis provides a reasonable forecast of future environmental conditions and can more accurately gauge the effects of a series of projects.

This analysis is cumulative in nature in that it analyzes future development under the proposed HEU throughout Palo Alto and takes into consideration the effects associated with development of multiple projects in the housing element cycle through 2031. For analyses that may have more localized or neighborhood implications (aesthetics, agriculture, biological resources, cultural resources, geology and soils, hazards and hazardous materials, hydrology and water quality, land use and planning, mineral resources, noise, public services, recreation, utilities, tribal cultural resources, wildfire), the geographic scope for cumulative impacts includes the city of Palo Alto. For these issue areas, generally, impacts are site specific and cumulative impacts would not be significant. Therefore, the proposed project would not result in a cumulatively considerable contribution to the above-mentioned issue areas. Future development projects would be reviewed by the City pursuant to CEQA to identify potential impacts to on a project-by-project basis. While there is the potential for significant cumulative impacts, it is anticipated that potential impacts associated with individual development projects would be addressed on a case-by-case basis and would be subject to the mitigation measures outlined in this Addendum, City policies, and State and local regulations regarding the protection of such resources. With compliance with the existing policies and regulations, and mitigation measures, future development would be required to avoid or mitigate impacts.

Therefore, the proposed project’s incremental contribution to cumulative impacts associated with aesthetics, agriculture, biological resources, cultural resources, geology and soils, hazards and hazardous materials, hydrology and water quality, land use and planning, mineral resources, noise, public services, recreation, utilities, tribal cultural resources, and wildfire would not be cumulatively considerable, and cumulative impacts would be less than significant.

Some analyses including air quality, energy, greenhouse gas emissions, transportation, and population and housing, rely on much larger geographic areas such as the Bay Area region. For issues that may have regional cumulative implications, the cumulative impact analysis is based on Plan Bay Area 2050, the Bay Area’s most recent Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS).

As discussed in Section 3, Air Quality, the project would be consistent with the 2017 Clean Air Plan control measures as development facilitated by the project would comply with the latest Title 24 regulations and would increase density in urban areas in proximity to transit, allowing for greater use of alternative modes of transportation. Additionally, the increase in VMT would not exceed the projected population increase per the BAAQMD CEQA Air Quality Guidelines for Item 9
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160 | Page Addendum to the 2030 Comprehensive Plan EIR operational emissions from plans. Discussion of these impacts considers the cumulative nature of criteria pollutants in the region. Therefore, the project would not result in a cumulatively considerable contribution to an air quality impact.

As discussed in Section 6, Energy, development facilitated by the project would not result in a wasteful, inefficient, or unnecessary consumption of energy, and operation of the new residential structures would not result in potentially significant environmental effects due to the wasteful, inefficient, or unnecessary consumption of energy. Development facilitated by the project would be consistent with the energy-related goals, policies, and actions of the Statewide plans and the City’s 2030 Comprehensive Plan; therefore, the project would not make a cumulatively considerable contribution to a significant cumulative impact with respect to consistency with renewable energy and energy efficiency plans. Projects throughout the Bay Area are required to adhere to applicable renewable energy and energy efficiency laws, programs, and policies such as California’s RPS, AB 2076, and Title 24 standards to avoid the wasteful, inefficient, or unnecessary consumption of energy.

As discussed in Section 8, Greenhouse Gas Emissions, the impact of GHG emissions generated by development facilitated by the proposed HEU is inherently cumulative. GHG emissions from one project cannot, on their own, result in changes in climatic conditions; therefore, the emissions from any project must be considered in the context of their contribution to cumulative global emissions, which is the basis for determining a significant cumulative impact.

This is determined through the project’s consistency with applicable GHG emission thresholds and applicable plans, policies, or regulations adopted for the purpose of reducing the emissions of GHGs. GHG emissions from development facilitated by the project would not exceed the BAAQMD interpolated 2031 plan-level threshold. In addition, development facilitated by the project would be consistent with the 2022 Scoping Plan, Plan Bay Area 2050, 2030 Comprehensive Plan, and the City’s S/CAP. Therefore, the project would not result in a significant cumulative impact related to GHG emissions.

As discussed in Section 14, Population and Housing, the proposed HEU would result in an increase of 919 more housing units compared to Scenario 6 of the 2017 EIR. However, the proposed project would be consistent with State requirements for the RHNA and would further assist in addressing the existing housing crisis and meeting the housing needs of the City’s communities. Therefore, the project would not result in a cumulatively considerable contribution to a population and housing impact.

As discussed in Section 17, Transportation, the proposed HEU would not result in a significant cumulative VMT impact. Therefore, the project would not result in a cumulatively considerable contribution to a transportation impact.

Therefore, with continued implementation of mitigation measures from the 2017 EIR, impacts of the proposed HEU would not be cumulatively considerable. Impacts would be generally the same as the impact analyzed in the 2017 EIR for the 2030 Comprehensive Plan. Because there would be no new or substantially more severe significant impacts than what was analyzed in the 2017 EIR, further analysis is not warranted.

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22 Other CEQA Required Discussions
The proposed HEU would not substantially change the discussion and findings presented for the 2030 Comprehensive Plan in Section 7, CEQA-Mandated Sections, of the 2017 EIR. These other required discussions include impacts found not to be significant, growth-inducing impacts, and irreversible changes. As with the 2017 EIR, the proposed HEU would not directly induce growth because it would not extend services to an undeveloped area. The proposed HEU would direct growth to specific areas that are already urbanized and underutilized and would improve mobility while not making new areas within or outside of Palo Alto easier to develop. Although employment growth that occurs during the life of the proposed HEU could indirectly induce additional growth by contributing to an increased demand for housing, similar to the 2017 EIR, future development would be required to comply with policies within the 2030 Comprehensive Plan to ensure growth occurs in a sustainable manner. All potential impacts associated with population and housing growth would be mitigated to less than significant levels. Given that the State is currently in an ongoing housing crisis due to an insufficient housing supply, the additional units under the proposed project would further assist in addressing the existing crisis and meeting the housing needs of the City’s communities, and would allow the city to satisfy its fair share of RHNA.

The proposed HEU would allow land uses largely consistent with current land uses and redevelopment would occur in areas that are already urbanized, which would not result in irreversible land use changes. Additionally, as discussed in Section 9, Hazards and Hazardous Materials, of this Addendum, compliance with federal, State, and local hazardous materials regulations and local emergency plans would ensure that irreversible changes to the physical environment from the accidental release of hazardous materials are less than significant. As with the 2017 EIR, the proposed HEU would irretrievably commit non-renewable resources for the construction and maintenance of buildings and infrastructure. These non-renewable resources include mined materials such as sand, gravel, steel, lead, copper, and other metals.

Buildout of the proposed HEU would also result in a long-term commitment to the consumption of fossil fuels, natural gas, and gasoline. Increased energy demands would be used for construction, lighting, heating, and cooling of residences, and transportation of people within, to, and from the housing inventory sites. However, the proposed project would place residents in proximity to transit, services, and jobs, which would reduce consumption of fossil fuels through the reduced reliance on single-occupancy vehicles and promote bicycling and walking.

Additionally, future development would be required to include an all-electric design pursuant to the City’s Reach Code and would utilize 100 percent carbon neutral electricity supplied by CPAU. Therefore, by facilitating residential development that would maximize conservation, energy efficiency, and solar energy generation, impacts would be less than significant.

As described above in Sections 1 through 20, the proposed project would not result in new or substantially more severe significant direct, indirect, or cumulative impacts beyond those identified in the 2017 EIR for the 2030 Comprehensive Plan. Therefore, the proposed project would also result in no new or substantially more severe significant impacts found not to be Item 9
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OTHER CEQA REQUIRED DISCUSSIONS
162 | Page Addendum to the 2030 Comprehensive Plan EIR significant, growth-inducing impacts, and irreversible changes beyond those previously discussed in the 2017 EIR.

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CONCLUSION
As demonstrated in the discussions above regarding the potential effects of the proposed HEU, substantial changes are not proposed to the 2030 Comprehensive Plan nor have substantial changes in circumstances occurred that would require major revisions to the 2017 EIR prepared for the 2030 Comprehensive Plan. Significant impacts beyond those identified and analyzed in the 2017 EIR would not be expected to occur as a result of the proposed project. Overall, the proposed HEU would result in no new information of substantial importance that would have new, more severe impacts, or new mitigation measures from what was identified in the 2017 EIR. As such, the proposed project would not result in conditions identified in State CEQA Guidelines Section 15162, and a Subsequent or Supplemental EIR is not required for the proposed project. Again, it should be noted that the proposed project would be subject to all previously required mitigation measures from the 2017 EIR, as applicable. The MMRP adopted for the 2030 Comprehensive Plan would continue to be applicable to the proposed project.

Based on the above analysis, this Addendum to the 2017 EIR for the 2030 Comprehensive Plan has been prepared in accordance with Section 15164 of the State CEQA Guidelines.

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REFERENCES

BIBLIOGRAPHY
Association of Bay Area Governments (ABAG). 202. Plan Bay Area 2050. https://www.planbayarea.org/sites/default/files/documents/Plan_Bay_Area_2050_October_20

21.pdf
BAAQMD. 2017a. California Environmental Quality Act: Air Quality Guidelines. San Francisco, CA. May 2017. http://www.baaqmd.gov/~/media/files/planning-and- research/ceqa/ceqa_guidelines_may2017-pdf.pdf?la=en
______. 2017b. Final 2017 Clean Air Plan. April 19, 2017. https://www.baaqmd.gov/~/media/files/planning-and-research/plans/2017-clean-air- plan/attachment-a_-proposed-final-cap-vol-1-pdf.pdf?la=en California Air Resources Board (CARB). 2005. Air Quality and Land Use handbook: A Community Health Perspective. https://sfmohcd.org/sites/default/files/20%20- %20CARB%2C%20Air%20Quality%20and%20Land%20Use%20Handbook%202005.pdf ______. 2017. 2017 Climate Change Scoping Plan.
https://ww2.arb.ca.gov/sites/default/files/classic/cc/scopingplan/scoping_plan_2017.pdf ______. 2021. Overview: Diesel Exhaust & Health. https://ww2.arb.ca.gov/resources/overview-diesel- exhaust-and-health
California Department of Conservation (DOC). 2002. California Geomorphic Provinces. https://www.conservation.ca.gov/cgs/Documents/Publications/CGS-Notes/CGS-Note-36.pdf CalRecycle. 2022a. Jurisdiction Disposal and Alternative Daily Cover (ADC) Tons by Facility. https://www2.calrecycle.ca.gov/LGCentral/DisposalReporting/Destination/DisposalByFacility ______. 2022b. Kirby Canyon Landfill.
https://www2.calrecycle.ca.gov/SolidWaste/SiteActivity/Details/1370?siteID=3393 ______. 2022c. Corinda Los Trancos Landfill (Ox Mountain). https://www2.calrecycle.ca.gov/SolidWaste/SiteActivity/Details/1561?siteID=3223 ______. 2022d. Monterey Peninsula Landfill.
https://www2.calrecycle.ca.gov/SolidWaste/SiteActivity/Details/2642?siteID=1976 ______. 2023. Estimated Solid Waste Generation Rates.
https://www2.calrecycle.ca.gov/wastecharacterization/general/rates DecisionInsite. 2021. Annual Enrollment Projection Report Palo Alto Unified School District. https://go.boarddocs.com/ca/pausd/Board.nsf/files/C29PNR646AA6/$file/20210420Attachmen t4DecisionInsiteEnrollmentProjectionReport.pdf
Department of Finance (DOF). 2022. E-5 Population and Housing Estimates for Cities, Counties, and the State 2020-2022. https://dof.ca.gov/forecasting/demographics/estimates/e-5-population-and- housing-estimates-for-cities-counties-and-the-state-2020-2022/ Item 9
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166 | Page Addendum to the 2030 Comprehensive Plan EIR IPCC. 2021. Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S. L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M. I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T. K. Maycock, T. Waterfield, O. Yelekçi, R. Yu and B. Zhou (eds.)] Cambridge University Press.
https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf Office of Emergency Services. 2017. Santa Clara County Operational Area Hazard Mitigation Plan. https://emergencymanagement.sccgov.org/sites/g/files/exjcpb261/files/For%20Partners/Local- Hazard-Mitigation-Plan-LHMP-Vol-1.pdf
Palo Alto, City of. 2005. Palo Alto Single-Family Individual Review Guidelines. Adopted June 10, 2005. https://www.cityofpaloalto.org/files/assets/public/planning-amp-development-services/file- migration/current-planning/forms-and-guidelines/individual-review-ir-guidelines.pdf ______. 2012. City of Palo Alto Bicycle and Pedestrian Transportation Plan. https://www.cityofpaloalto.org/files/assets/public/transportation/projects/bicycle-pedestrian- transportation-plan_adopted-july-2012.pdf
______. 2016. City of Palo Alto Comprehensive Plan Draft EIR Volume 1. Adopted February 5, 2016. https://www.cityofpaloalto.org/files/assets/public/planning-amp-development-services/3.- comprehensive-plan/comprehensive-plan/paloaltocompplandeir_vol1_web-1.pdf ______. 2017a. City of Palo Alto Comprehensive Plan Update Supplement to the Draft EIR. https://www.cityofpaloalto.org/files/assets/public/planning-amp-development-services/3.- comprehensive-plan/comprehensive-plan/paloalto_compplanupdate_suppeir_feb2017.pdf ______. 2017b. City of Palo Alto Comprehensive Plan. Adopted November 13, 2017. https://www.cityofpaloalto.org/files/assets/public/planning-amp-development-services/3.- comprehensive-plan/comprehensive-plan/full-comp-plan-2030_with-june21-amendments.pdf ______. 2018. City of Palo Alto Zero Waste Plan. Adopted August 2018. https://www.cityofpaloalto.org/files/assets/public/zero-waste/zero-waste-website-files/2018- zero-waste-plan.pdf
______. 2020. Regulations for Groundwater Dewatering during Construction of Below Ground Structures. https://www.cityofpaloalto.org/files/assets/public/public-works/engineering- services/webpages/forms-and-permits/regulations-for-groundwater-dewatering-during- construction-of-below-ground-structures-2021.pdf
______. 2021. 2020 Urban Water Management Plan and Water Shortage Contingency Plan. https://www.cityofpaloalto.org/files/assets/public/utilities/uwmp/2020-uwmp_final- submission-to-dwr.pdf
______. 2022a. Green Building Code Requirements. https://www.cityofpaloalto.org/City- Hall/Sustainability/Green-Building-Code-Requirements
______. 2022b. Carbon Neutral Electricity and Natural Gas. https://www.cityofpaloalto.org/Departments/Utilities/Sustainability/Carbon-Neutral-Electricity- and-Natural-Gas
______. 2022c. Dewatering Sites.
https://www.google.com/maps/d/viewer?mid=14ztztkt6te1yanSaxzUhuJONY- E&ll=37.43630527807649%2C-122.13162251821232&z=14
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______. 2022d. Fire Station No. 4 Replacement Project.
https://www.cityofpaloalto.org/Departments/Public-Works/Engineering-Services/Engineering- Projects/Fire-Station-No.-4-Replacement-Project
______. 2023a. 2022 Sustainability and Climate Action Plan. https://www.cityofpaloalto.org/files/assets/public/v/1/sustainability/reports/2022-scap- report_final.pdf
______. 2023b. Below Market Rate Housing. https://www.cityofpaloalto.org/Departments/Planning- Development-Services/Long-Range-Planning/Housing-Policies-and-Programs/Below-Market- Rate-Housing
Santa Clara County Airport Land Use Commission. 2016. Comprehensive Land Use Plan Santa Clara County Palo Alto Airport. Amended November 16, 2016.
https://www.cityofpaloalto.org/files/assets/public/planning-amp-development-services/3.- comprehensive-plan/aluc_pao_clup_2017.pdf
United States Environmental Protection Agency (US EPA). 2021. Overview of Greenhouse Gases. https://www.epa.gov/ghgemissions/overview-greenhouse-gases

LIST OF PREPARERS
Rincon Consultants, Inc. prepared this Addendum under contract to the City of Palo Alto.

Persons involved in data gathering analysis, project management, and quality control include the following:

RINCON CONSULTANTS, INC.

Abe Leider, AICP CEP, Principal in Charge
Karly Kaufman, MESM, Project Manager
Heather Dubois, Senior Air Quality Specialist
Bill Vosti, Program Manager – Air Quality, GHG Emissions, and Noise Nichole Yee, Environmental Planner
Gina Gerlich, GIS Analyst
Debra Jane Seltzer, Publishing Specialist
Yaritza Ramirez, Publishing Specialist
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Appendix

A
Vehicle Miles Traveled Analysis
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Technical Memorandum

Date: November 1, 2023
To: Karly Kaufman
From: At van den Hout
Subject: VMT Analysis for the Palo Alto Housing Element Update (HEU)

Hexagon Transportation Consultants, Inc. has conducted a CEQA transportation VMT analysis for the proposed residential developments under the Palo Alto Housing Element. This memorandum presents a summary of the vehicle miles traveled (VMT) methodology and analysis findings.

Project Description
The proposed Housing Element would amend the City of Palo Alto’s 2030 Comprehensive Plan by replacing the current Housing Element with the proposed 2023-2031 Housing Element. The proposed Housing Element identifies 280 sites that could provide additional housing of 6,860 residential units within the City of Palo Alto. The majority of the sites are located throughout Palo Alto’s Downtown and South of the Forest Area in districts that allow for a mix of residential and commercial uses near transit and services.

Senate Bill 743
Based on revisions in State law to implement Senate Bill (SB) 743, public agencies in California are mandated to use vehicle miles traveled (VMT) as the metric for CEQA transportation analyses starting July 1, 2020. The CEQA Guidelines now identify VMT as the most appropriate metric for evaluating a project’s transportation impacts. With the California Natural Resources Agency’s certification and adoption of the changes to the CEQA Guidelines, automobile delay, and congestion, as measured by level of service (LOS) and other similar metrics, no longer constitutes a significant environmental effect under CEQA. However, LOS is used outside the CEQA document to evaluate other non-CEQA transportation impacts of development projects, such as congestion, circulation, and safety issues and concerns.

Palo Alto Vehicle Miles Traveled Policy
On June 15, 2020, the Palo Alto City Council established a VMT policy by adopting a resolution updating the City’s transportation analysis methodology under CEQA to comply with California Senate Bill 743. In addition, City Council adopted a local transportation impact analysis policy to evaluate the level of service and other local roadway impacts. The VMT policy contains screening criteria to identify projects that can be presumed to have a less than significant transportation impact. The Governor’s Office of Planning and Research (OPR) recommends that agencies use screening criteria to identify projects known to reduce VMT or be low VMT generators, and that are thus expected to have a less than significant VMT impact. These projects would then be exempt from performing a quantitative VMT analysis. The use of screening criteria streamlines analysis for projects already presumed to have a less than significant impact on VMT. Palo Alto’s Comprehensive Plan policies encourage housing developments to protect local-serving retail, and to reduce traffic on the roadway network. Therefore, projects aligned with City policies do not have to procure costly and redundant transportation analyses that will show they are low-VMT generators under CEQA. If a project meets the screening criteria, a quantitative VMT analysis would not Item 9
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be required; however, the CEQA analysis would still include a qualitative assessment of VMT, discussing the site(s) and location characteristics.

The City of Palo Alto has established the following VMT screening criteria to determine land use development projects that may be exempt from additional VMT analysis under the City’s VMT guidelines:

• Small Projects: Projects that generate fewer than 110 trips per day. This may equate to non- residential projects of 10,000 sq. ft., or less and residential projects of 20 units or less. • Projects in Low VMT Areas: Residential and office projects located in low-VMT areas1 with similar features (i.e., density, mix of uses, transit accessibility) as existing developments in these areas. • Projects in Proximity to Major Transit Stops: Projects that are located within a half mile of an existing or planned high-quality transit corridor or major transit stations, and meet the following additional criteria:
(1) is high density (minimum floor area ratio of 0.75), (2) does not exceed parking requirements,
(3) is consistent with Plan Bay Area, and
(4) does not replace affordable units with smaller numbers of moderate- or above moderate- income units.
• Affordable Housing: 100% affordable housing projects in infill locations. • Local Serving Retail: Retail projects of 50,000 sq. ft. or less.

Thresholds of Significance
Land use projects not screened out will require quantitative VMT analyses, and their VMTs must be below pre-determined thresholds to be considered as having a less-than-significant impact. Consistent with State CEQA Guidelines Section 15064.3, the City of Palo Alto has adopted the thresholds of significance for residential projects. A residential project that exceeds a level of 15% below existing (baseline) County home-based VMT per resident may indicate a significant transportation impact. Because the proposed Housing Element is a citywide plan, this threshold is applied to the citywide home-based VMT per resident.

VMT Analysis Methodology and Findings
When applying the above thresholds for residential projects, VMT is compared to a threshold based on the countywide (2015) baseline VMT value, which is the home-based VMT per resident. Home-based VMT per resident is defined as the number of all home-based automobile vehicle trips traced back to the residence multiplied by the vehicle distance. This home-based VMT is then divided by the population to calculate home-based VMT per resident.

1 Residential projects located in areas where baseline VMT is 15% below the existing county average per resident, and office projects located in areas where baseline VMT is 15% below the existing regional average per employee could be considered to be in low-VMT areas and presumed to have a less than significant VMT impact.

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Travel Forecasting Model
The VMT calculations are done with the recently completed Palo Alto Travel Forecasting Model (PA model).

The PA model is a refinement of Santa Clara Valley Transportation Authority’s (VTA’s) Bi-County Travel Forecasting Model (VTA model)2. The PA model is the best available tool to simulate travel in Palo Alto and serves as the primary forecasting tool for the City. The model is a mathematical representation of travel in the nine Bay Area counties and Santa Cruz, San Benito, Monterey, and San Juaquin counties, focusing on travel within the City of Palo Alto. The model has four main components: 1) trip generation, 2) trip distribution, 3) mode choice, and 4) trip assignment. The model uses socioeconomic inputs (i.e., population, income, employment) aggregated into geographic areas, called transportation analysis zones (TAZs), to estimate travel within the modeled area. There are 110 TAZs within the model that represent the City of Palo Alto, and the 280 Housing Element sites are spread out over 54 TAZs.

Scenarios Analyzed
In addition to evaluating VMT for the Housing Element, VMT associated with Scenario 6 of the City’s Comprehensive Plan was also analyzed. The land use assumptions and transportation networks of the PA model were updated to reflect the year 2031 conditions. The year 2031 land use data outside Palo Alto was interpolated between VTA’s 2015 and 2040 land use assumptions. Palo Alto’s two future land use scenarios reflect the increases in households and employment proposed for the Comprehensive Plan and the Housing Element, respectively. The following scenarios are addressed in the VMT analysis. • Baseline (2015) Conditions: The baseline (2015) PA model is used to determine the baseline home- based VMT per resident for the TAZs in Palo Alto, as well as to determine the countywide average VMT per resident and the 85th percentile of the countywide average VMT per resident. • Comprehensive Plan (2031) Conditions: This scenario includes the proposed land uses assumed for Scenario 6 of Palo Alto’s Comprehensive Plan. Scenario 6 contains 6,000 additional housing units and 8,868 jobs.
• Housing Element (2031) Conditions: This scenario includes the proposed land uses assumed in the Housing Element. The Housing Element includes 6,860 additional housing units and 8,868 jobs.

Figures 1 and 2 present the growth in housing units for the TAZs assumed for the Comprehensive Plan and the Housing Element Plan, respectively. The increase in jobs, which is assumed to be the same for both the Comprehensive Plan and the Housing Element Plan, is shown on Figure 3.

2 Documentation of the Palo Alto Travel Forecasting Model Update is summarized in a Technical Memorandum: Palo Alto Model Update and Validation Results, January 5, 2023.

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Figure 1
Increase in Housing Units by Palo Alto TAZ for the Comprehensive Plan City of Palo Alto
13 12
14 5
1 6
6 3
1 1
3 4
5 6
7 7
8 7
2 4
6 12
16 6
4 7
97 4
11 13
17 13
6 222
3 9
33 47
4 30
235
78 18
194
19 896
108
75 20
53 11
863
52 223
13 128
18 33
400
224
174
38 19
31 259
19 13
170
118
10 123
81 114
148
155
117
63 134
72 103
68 676868
8673
Legend
Increase in the Number of Housing Units
0 1 - 50
51 - 200
201 - 500
501 - 896
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Figure 2
Increase in Housing Units by Palo Alto TAZ for the Housing Element City of Palo Alto
175
5 96
36 22
34 8
246
98 6
69 52
26 67
38 18
47 996
14 25
24 384
23 123
252
86 701
67 1121
11 155
238
300
425
39 30
43 812
54 66
136
156
8 99
30 8
15 14
60 11
77 191
82 Legend
Increase in the Number of Housing Units
0 - 1
2 - 50
51 - 200
201 - 500
501 - 996
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44 38
40 74
38 323
29 39
320
364
87 70
51 9
79 80
60 19
128
19 133
47 23
62 182
74 1710
63 99
115
195
75 90
178
266
93 74
39 1899
19 306
355
58 27
24 24
8564
22 58
546943
5853
222
Legend
Increase in the Number of Jobs
0 - 1
2 - 100
101 - 200
201 - 500
501 - 1899
Figure 3
Increase in Employment by Palo Alto TAZ
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VMT Analysis for the Palo Alto Housing Element Update (HEU) November 1, 2023 P a g e | 7
Residential VMT Analysis
The PA model was used to estimate the 2015 baseline countywide VMT, the VMT for the Comprehensive Plan, and the Housing Element. Table 1 below shows the residential VMT, the number of housing units, the population, and the VMT per resident for Santa Clara County and three Palo Alto scenarios. The county average VMT per resident for residential development is 12.90, and the threshold of significance is 85 percent of 12.90 or 10.97 daily vehicle miles per resident. As a whole, the Comprehensive Plan and the Housing Element have a residential VMT of 9.02 and 9.25, respectively, which is less than 85 percent of the county average VMT per resident. Thus, the VMT per resident for the Housing Element (and also for the Comprehensive Plan) as a whole would be below the threshold of 10.97 VMT per resident. Therefore, implementing the Housing Element would result in a less-than-significant VMT impact on transportation.

Table 1: VMT Projections for Palo Alto and Santa Clara County

Site-Specific VMT Analysis
The following site-specific analysis is provided for informational purposes only, and, as explained earlier, the relevant analysis for CEQA purposes is citywide VMT.

The 280 Housing Element sites are spread out over 54 TAZs. A VMT analysis for each of the 54 TAZs shows that the Housing Element sites in six TAZs have a VMT per resident higher than the threshold of 85 percent of the countywide average. A summary of the VMT data for those six TAZs is shown in Table 2.

Table 2
Housing Sites in TAZs with VMTs Higher than 85 Percent of the County Average

The VMT per resident at four TAZs (473, 477, 495, and 533) is still lower than the county average of 12.90.

Area Scenario Residential
VMT 1
Housing
Units Population VMT per
Resident 2
2015 643,912 27,771 69,537 9.26
2031 Comp 763,463 33,771 84,597 9.02
2031 HEU 802,681 34,631 86,756 9.25
Santa Clara County 2015 23,897,059 627,249 1,852,178 12.90 1 Residential VMT = Home-Based Trip Productions * Travel Distance 2 VMT per Resident = Residential VMT / Population
City of Palo Alto
TAZ
Residential
VMT 1
Total Housing
Units Population
VMT per
Resident 2
HEU Housing
Units
473 38,997 1,345 3,454 11.29 996
477 26,317 842 2,113 12.45 812
495 4,692 212 408 11.51 11
496 8,059 324 619 13.02 14
525 6,387 175 439 14.54 175
533 14,990 645 1,233 12.15 30
Total 2,038
1 Residential VMT = Home-Based Trip Productions * Travel Distance 2 VMT per Resident = Residential VMT / Population
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Individual housing development projects located at sites in these four TAZs are subject to mitigate VMT impacts. A list of TDM strategies to mitigate VMT impacts can be found in Appendix G of the document “SB 743 Implementation Decisions for Palo Alto” at this link.

TAZs 496 and 525 have VMT per resident values greater than the countywide average, and the VMTs at these TAZs are immitigable. Projects located in these two TAZs may require a project-specific VMT analysis, as appropriate under state law.

The sites in the other 48 TAZs have VMT per resident values less than 85 percent of the county average. A map of the VMT per resident for the Housing Element TAZs is shown on Figure 4.

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Figure 4
Home-Based VMT per Resident for the Housing Element TAZs City of Palo Alto

14.54 8.6310.22

9.46 9.59

3.68 8.82

10.92 7.95

8.928.11

11.29 6.33

6.18 8.04

10.04 10.35

10.93 6.41

10.71 10.12

3.92 9.91

8.85 13.02

5.82 7.24

6.11 9.55

5.86 6.31 6.66

10.65 10.96

11.51 8.86

12.45 5.44

10.64 12.15

9.06 10.76

9.91 8.42

4.54 5.82

9.11 8.66

7.48 7.56

9.29 6.16

7.61 8.89
Legend
VMT is less than 85% of the County Average
VMT is between 85% and 100 % of the County Average
VMT is greater than 100 % of the County Average
XX.XX = Home-based VMT per Resident
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Appendix

B
Greenhouse Gas Emissions Modeling Results
Item 9
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Addendum to the
Comprehensive Plan EIR
(November 2023)

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Palo Alto HEU - GHG Emissions Detailed Report
Table of Contents

1. Basic Project Information

1.1. Basic Project Information

1.2. Land Use Types

1.3. User-Selected Emission Reduction Measures by Emissions Sector

2. Emissions Summary

2.1. Construction Emissions Compared Against Thresholds

2.2. Construction Emissions by Y ear, Unmitigated

2.4. Operations Emissions Compared Against Thresholds

2.5. Operations Emissions by Sector, Unmitigated

3. Construction Emissions Details

3.1. Demolition (2023) - Unmitigated

3.3. Site Preparation (2023) - Unmitigated

3.5. Grading (2023) - Unmitigated

3.7. Building Construction (2023) - Unmitigated
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3.9. Building Construction (2024) - Unmitigated

3.11. Building Construction (2025) - Unmitigated

3.13. Building Construction (2026) - Unmitigated

3.15. Paving (2026) - Unmitigated

3.17. Architectural Coating (2025) - Unmitigated

3.19. Architectural Coating (2026) - Unmitigated

4. Operations Emissions Details

4.1. Mobile Emissions by Land Use

4.1.1. Unmitigated

4.2. Energy

4.2.1. Electricity Emissions By Land Use - Unmitigated

4.2.3. Natural Gas Emissions By Land Use - Unmitigated

4.3. Area Emissions by Source

4.3.1. Unmitigated

4.4. Water Emissions by Land Use

4.4.1. Unmitigated

4.5. Waste Emissions by Land Use
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4.5.1. Unmitigated

4.6. Refrigerant Emissions by Land Use

4.6.1. Unmitigated

4.7. Offroad Emissions By Equipment Type

4.7.1. Unmitigated

4.8. Stationary Emissions By Equipment Type

4.8.1. Unmitigated

4.9. User Defined Emissions By Equipment Type

4.9.1. Unmitigated

4.10. Soil Carbon Accumulation By Vegetation Type

4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated

4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated

4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated

5. Activity Data

5.1. Construction Schedule

5.2. Off-Road Equipment

5.2.1. Unmitigated
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5.3. Construction Vehicles

5.3.1. Unmitigated

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies

5.5. Architectural Coatings

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities

5.6.2. Construction Earthmoving Control Strategies

5.7. Construction Paving

5.8. Construction Electricity Consumption and Emissions Factors

5.9. Operational Mobile Sources

5.9.1. Unmitigated

5.10. Operational Area Sources

5.10.1. Hearths

5.10.1.1. Unmitigated

5.10.2. Architectural Coatings

5.10.3. Landscape Equipment
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5.11. Operational Energy Consumption

5.11.1. Unmitigated

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated

5.13. Operational Waste Generation

5.13.1. Unmitigated

5.14. Operational Refrigeration and Air Conditioning Equipment

5.14.1. Unmitigated

5.15. Operational Off-Road Equipment

5.15.1. Unmitigated

5.16. Stationary Sources

5.16.1. Emergency Generators and Fire Pumps

5.16.2. Process Boilers

5.17. User Defined

5.18. Vegetation

5.18.1. Land Use Change

5.18.1.1. Unmitigated
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5.18.1. Biomass Cover Type

5.18.1.1. Unmitigated

5.18.2. Sequestration

5.18.2.1. Unmitigated

6. Climate Risk Detailed Report

6.1. Climate Risk Summary

6.2. Initial Climate Risk Scores

6.3. Adjusted Climate Risk Scores

6.4. Climate Risk Reduction Measures

7. Health and Equity Details

7.1. CalEnviroScreen 4.0 Scores

7.2. Healthy Places Index Scores

7.3. Overall Health & Equity Scores

7.4. Health & Equity Measures

7.5. Evaluation Scorecard

7.6. Health & Equity Custom Measures

8. User Changes to Default Data
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1. Basic Project Information

1.1. Basic Project Information
Data Field Value
Project Name Palo Alto HEU - GHG Emissions
Construction Start Date 2/7/2023
Operational Y ear 2031
Lead Agency —
Land Use Scale Plan/community
Analysis Level for Defaults County
Windspeed (m/s) 4.20
Precipitation (days) 18.8
Location Palo Alto, CA, USA
County Santa Clara
City Palo Alto
Air District Bay Area AQMD
Air Basin San Francisco Bay Area
TAZ 1726
EDFZ 1
Electric Utility City of Palo Alto
Gas Utility City of Palo Alto Ultilities
App Version 2022.1.1.20

1.2. Land Use Types
Land Use Subtype Size Unit Lot Acreage Building Area (sq ft) Landscape Area (sq ft)
Special Landscape
Area (sq ft)
Population Description
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Apartments Mid Rise 919 Dwelling Unit 24.2 882,240 0.00 0.00 2,307 —

1.3. User-Selected Emission Reduction Measures by Emissions Sector No measures selected

2. Emissions Summary

2.1. Construction Emissions Compared Against Thresholds Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 4.77 46.9 39.8 48.3 0.06 1.81 19.8 21.6 1.66 10.1 11.8 — 11,987 11,987 0.55 0.66 33.9 12,226 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 4.36 46.8 27.4 43.7 0.04 1.20 7.26 7.75 1.10 1.73 2.19 — 11,486 11,486 0.42 0.68 0.88 11,699 Average
Daily
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 3.02 28.2 18.5 30.2 0.03 0.76 4.99 5.62 0.70 1.90 2.61 — 8,108 8,108 0.28 0.47 10.2 8,264 Annual
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.55 5.14 3.37 5.51 0.01 0.14 0.91 1.03 0.13 0.35 0.48 — 1,342 1,342 0.05 0.08 1.69 1,368

2.2. Construction Emissions by Y ear, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Y ear TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Item 9
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——————————————————Daily -
Summer
(Max)
2023 4.77 4.01 39.8 46.2 0.06 1.81 19.8 21.6 1.66 10.1 11.8 — 11,024 11,024 0.55 0.63 33.9 11,260 2024 4.25 3.61 16.6 43.9 0.04 0.53 6.16 6.70 0.49 1.47 1.97 — 10,876 10,876 0.37 0.63 31.7 11,106 2025 4.66 46.9 16.7 48.3 0.04 0.50 7.26 7.75 0.46 1.73 2.19 — 11,987 11,987 0.37 0.66 33.9 12,226 2026 4.23 46.7 15.6 46.0 0.04 0.44 7.26 7.69 0.41 1.73 2.14 — 11,811 11,811 0.37 0.66 30.7 12,048 Daily -
Winter
(Max)
— — — — — — — — — — — — — — — — — —
2023 4.34 3.68 27.4 41.9 0.04 1.20 6.16 6.75 1.10 1.47 2.02 — 10,588 10,588 0.42 0.65 0.88 10,792 2024 4.15 3.51 17.2 39.9 0.04 0.53 6.16 6.70 0.49 1.47 1.97 — 10,450 10,450 0.41 0.65 0.82 10,654 2025 4.36 46.8 17.3 43.7 0.04 0.50 7.26 7.75 0.46 1.73 2.19 — 11,486 11,486 0.41 0.68 0.88 11,699 2026 4.16 46.4 16.3 41.5 0.04 0.44 7.26 7.69 0.41 1.73 2.14 — 11,322 11,322 0.41 0.68 0.80 11,534 Average
Daily
— — — — — — — — — — — — — — — — — —
2023 2.70 2.28 18.5 21.7 0.03 0.76 4.86 5.62 0.70 1.90 2.61 — 4,574 4,574 0.18 0.16 3.23 4,629 2024 2.96 2.50 12.1 28.3 0.03 0.38 4.36 4.74 0.35 1.04 1.40 — 7,526 7,526 0.28 0.46 9.77 7,681 2025 3.02 28.2 12.0 30.2 0.03 0.35 4.99 5.34 0.32 1.19 1.51 — 8,108 8,108 0.27 0.47 10.2 8,264 2026 1.72 19.0 7.12 17.4 0.02 0.21 2.82 3.03 0.19 0.67 0.87 — 4,643 4,643 0.16 0.26 5.20 4,730 Annual — — — — — — — — — — — — — — — — — —
2023 0.49 0.42 3.37 3.96 0.01 0.14 0.89 1.03 0.13 0.35 0.48 — 757 757 0.03 0.03 0.53 766 2024 0.54 0.46 2.21 5.16 0.01 0.07 0.80 0.87 0.06 0.19 0.25 — 1,246 1,246 0.05 0.08 1.62 1,272 2025 0.55 5.14 2.19 5.51 0.01 0.06 0.91 0.97 0.06 0.22 0.28 — 1,342 1,342 0.05 0.08 1.69 1,368 2026 0.31 3.47 1.30 3.18 < 0.005 0.04 0.51 0.55 0.04 0.12 0.16 — 769 769 0.03 0.04 0.86 783

2.4. Operations Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Item 9
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Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 14.8 36.5 17.2 104 0.32 0.87 26.7 27.6 0.86 6.77 7.64 397 38,156 38,553 32.3 1.22 60.7 39,785 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 14.3 36.0 18.5 98.2 0.30 0.87 26.7 27.6 0.86 6.77 7.64 397 36,573 36,970 32.4 1.32 7.73 38,181 Average
Daily
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 12.5 34.7 8.69 87.3 0.24 0.15 25.1 25.2 0.14 6.36 6.50 397 24,312 24,709 32.1 1.21 28.7 25,900 Annual
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 2.28 6.34 1.59 15.9 0.04 0.03 4.58 4.61 0.03 1.16 1.19 65.7 4,025 4,091 5.31 0.20 4.74 4,288

2.5. Operations Emissions by Sector, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Sector TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Mobile 13.7 12.8 8.09 100 0.26 0.14 26.7 26.9 0.13 6.77 6.90 — 26,643 26,643 1.00 1.01 54.4 27,022 Area 1.06 23.7 9.07 3.86 0.06 0.73 — 0.73 0.73 — 0.73 0.00 11,513 11,513 0.22 0.02 — 11,525 Energy 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Water — — — — — — — — — — — 89.6 0.00 89.6 0.31 0.20 — 156 Waste — — — — — — — — — — — 307 0.00 307 30.7 0.00 — 1,076 Refrig. — — — — — — — — — — — — — — — — 6.32 6.32
Total 14.8 36.5 17.2 104 0.32 0.87 26.7 27.6 0.86 6.77 7.64 397 38,156 38,553 32.3 1.22 60.7 39,785 Item 9
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——————————————————Daily,
Winter
(Max)
Mobile 13.3 12.3 9.46 94.3 0.25 0.14 26.7 26.9 0.13 6.77 6.90 — 25,059 25,059 1.13 1.11 1.41 25,418 Area 1.06 23.7 9.07 3.86 0.06 0.73 — 0.73 0.73 — 0.73 0.00 11,513 11,513 0.22 0.02 — 11,525 Energy 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Water — — — — — — — — — — — 89.6 0.00 89.6 0.31 0.20 — 156 Waste — — — — — — — — — — — 307 0.00 307 30.7 0.00 — 1,076 Refrig. — — — — — — — — — — — — — — — — 6.32 6.32
Total 14.3 36.0 18.5 98.2 0.30 0.87 26.7 27.6 0.86 6.77 7.64 397 36,573 36,970 32.4 1.32 7.73 38,181 Average
Daily
— — — — — — — — — — — — — — — — — —
Mobile 12.4 11.5 8.46 87.2 0.24 0.13 25.1 25.2 0.12 6.36 6.49 — 24,028 24,028 1.02 1.01 22.3 24,378 Area 0.03 23.2 0.22 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 284 284 0.01 < 0.005 — 284 Energy 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Water — — — — — — — — — — — 89.6 0.00 89.6 0.31 0.20 — 156 Waste — — — — — — — — — — — 307 0.00 307 30.7 0.00 — 1,076 Refrig. — — — — — — — — — — — — — — — — 6.32 6.32
Total 12.5 34.7 8.69 87.3 0.24 0.15 25.1 25.2 0.14 6.36 6.50 397 24,312 24,709 32.1 1.21 28.7 25,900 Annual — — — — — — — — — — — — — — — — — —
Mobile 2.27 2.10 1.54 15.9 0.04 0.02 4.58 4.60 0.02 1.16 1.18 — 3,978 3,978 0.17 0.17 3.70 4,036 Area < 0.005 4.23 0.04 0.02 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 47.0 47.0 < 0.005 < 0.005 — 47.1 Energy 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Water — — — — — — — — — — — 14.8 0.00 14.8 0.05 0.03 — 25.8 Waste — — — — — — — — — — — 50.9 0.00 50.9 5.09 0.00 — 178 Refrig. — — — — — — — — — — — — — — — — 1.05 1.05
Total 2.28 6.34 1.59 15.9 0.04 0.03 4.58 4.61 0.03 1.16 1.19 65.7 4,025 4,091 5.31 0.20 4.74 4,288 Item 9
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3. Construction Emissions Details

3.1. Demolition (2023) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

3.39 2.84 27.3 23.5 0.03 1.20 — 1.20 1.10 — 1.10 — 3,425 3,425 0.14 0.03 — 3,437 Demolitio
n
— — — — — — 0.00 0.00 — 0.00 0.00 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

3.39 2.84 27.3 23.5 0.03 1.20 — 1.20 1.10 — 1.10 — 3,425 3,425 0.14 0.03 — 3,437 Demolitio
n
— — — — — — 0.00 0.00 — 0.00 0.00 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.46 0.39 3.75 3.22 < 0.005 0.16 — 0.16 0.15 — 0.15 — 469 469 0.02 < 0.005 — 471 Demolitio
n
— — — — — — 0.00 0.00 — 0.00 0.00 — — — — — — —
Onsite
truck

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Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.08 0.07 0.68 0.59 < 0.005 0.03 — 0.03 0.03 — 0.03 — 77.7 77.7 < 0.005 < 0.005 — 77.9 Demolitio
n
— — — — — — 0.00 0.00 — 0.00 0.00 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.06 0.06 0.05 0.71 0.00 0.00 0.12 0.12 0.00 0.03 0.03 — 134 134 0.01 < 0.005 0.61 136 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.06 0.05 0.06 0.61 0.00 0.00 0.12 0.12 0.00 0.03 0.03 — 124 124 < 0.005 0.01 0.02 125 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.01 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 — 17.1 17.1 < 0.005 < 0.005 0.04 17.4 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.02 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 2.84 2.84 < 0.005 < 0.005 0.01 2.88 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Item 9
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3.3. Site Preparation (2023) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

4.70 3.95 39.7 35.5 0.05 1.81 — 1.81 1.66 — 1.66 — 5,295 5,295 0.21 0.04 — 5,314 Dust
From
Material
Movement
— — — — — — 19.7 19.7 — 10.1 10.1 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.39 0.32 3.27 2.92 < 0.005 0.15 — 0.15 0.14 — 0.14 — 435 435 0.02 < 0.005 — 437 Dust
From
Material
Movement
— — — — — — 1.62 1.62 — 0.83 0.83 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.07 0.06 0.60 0.53 < 0.005 0.03 — 0.03 0.02 — 0.02 — 72.1 72.1 < 0.005 < 0.005 — 72.3 Item 9
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Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
296

Packet Pg. 363 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 15 / 54
———————0.150.15—0.290.29——————Dust
From
Material
Movement
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.07 0.06 0.05 0.83 0.00 0.00 0.14 0.14 0.00 0.03 0.03 — 156 156 0.01 0.01 0.71 159 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.01 0.01 < 0.005 0.06 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 — 12.0 12.0 < 0.005 < 0.005 0.03 12.2 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 1.99 1.99 < 0.005 < 0.005 < 0.005 2.02 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.5. Grading (2023) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
297

Packet Pg. 364 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 16 / 54
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

4.43 3.72 37.3 31.4 0.06 1.59 — 1.59 1.47 — 1.47 — 6,598 6,598 0.27 0.05 — 6,621 Dust
From
Material
Movement
— — — — — — 9.20 9.20 — 3.65 3.65 — — — — — — —
Onsite
truck

0.91 0.76 7.66 6.45 0.01 0.33 — 0.33 0.30 — 0.30 — 1,356 1,356 0.05 0.01 — 1,360 Dust
From
Material
Movement
— — — — — — 1.89 1.89 — 0.75 0.75 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.17 0.14 1.40 1.18 < 0.005 0.06 — 0.06 0.06 — 0.06 — 224 224 0.01 < 0.005 — 225 Dust
From
Material
Movement
— — — — — — 0.35 0.35 — 0.14 0.14 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
298

Packet Pg. 365 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 17 / 54
——————————————————Daily,
Summer
(Max)
Worker 0.08 0.07 0.06 0.95 0.00 0.00 0.17 0.17 0.00 0.04 0.04 — 178 178 0.01 0.01 0.81 181 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.02 0.01 0.01 0.17 0.00 0.00 0.03 0.03 0.00 0.01 0.01 — 34.3 34.3 < 0.005 < 0.005 0.07 34.8 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.03 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 — 5.68 5.68 < 0.005 < 0.005 0.01 5.76 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.7. Building Construction (2023) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.50 1.26 11.8 13.2 0.02 0.55 — 0.55 0.51 — 0.51 — 2,397 2,397 0.10 0.02 — 2,406 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
299

Packet Pg. 366 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 18 / 54
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.50 1.26 11.8 13.2 0.02 0.55 — 0.55 0.51 — 0.51 — 2,397 2,397 0.10 0.02 — 2,406 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.32 0.27 2.50 2.78 < 0.005 0.12 — 0.12 0.11 — 0.11 — 507 507 0.02 < 0.005 — 508 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.06 0.05 0.46 0.51 < 0.005 0.02 — 0.02 0.02 — 0.02 — 83.9 83.9 < 0.005 < 0.005 — 84.2 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 2.67 2.44 1.99 31.3 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,898 5,898 0.29 0.21 26.8 5,996 Vendor 0.27 0.10 3.73 1.78 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,728 2,728 0.17 0.40 7.08 2,859 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 2.57 2.33 2.43 26.9 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,461 5,461 0.16 0.23 0.70 5,534 Vendor 0.27 0.10 3.94 1.83 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,730 2,730 0.17 0.40 0.18 2,853 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
300

Packet Pg. 367 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 19 / 54
Worker 0.54 0.49 0.47 5.62 0.00 0.00 1.14 1.14 0.00 0.27 0.27 — 1,167 1,167 0.03 0.05 2.45 1,184 Vendor 0.06 0.02 0.82 0.38 < 0.005 0.01 0.14 0.15 0.01 0.04 0.05 — 577 577 0.04 0.08 0.65 603 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker 0.10 0.09 0.09 1.03 0.00 0.00 0.21 0.21 0.00 0.05 0.05 — 193 193 < 0.005 0.01 0.40 196 Vendor 0.01 < 0.005 0.15 0.07 < 0.005 < 0.005 0.03 0.03 < 0.005 0.01 0.01 — 95.5 95.5 0.01 0.01 0.11 99.9 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.9. Building Construction (2024) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.44 1.20 11.2 13.1 0.02 0.50 — 0.50 0.46 — 0.46 — 2,398 2,398 0.10 0.02 — 2,406 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.44 1.20 11.2 13.1 0.02 0.50 — 0.50 0.46 — 0.46 — 2,398 2,398 0.10 0.02 — 2,406 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.03 0.86 8.04 9.39 0.02 0.36 — 0.36 0.33 — 0.33 — 1,717 1,717 0.07 0.01 — 1,723 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
301

Packet Pg. 368 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 20 / 54

0.000.000.000.000.000.00—0.000.000.000.000.000.000.000.000.000.000.00Onsite truck
Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.19 0.16 1.47 1.71 < 0.005 0.07 — 0.07 0.06 — 0.06 — 284 284 0.01 < 0.005 — 285 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 2.54 2.31 1.79 29.1 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,785 5,785 0.10 0.21 24.7 5,876 Vendor 0.27 0.10 3.56 1.70 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,694 2,694 0.17 0.40 7.08 2,824 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 2.45 2.21 2.23 25.0 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,357 5,357 0.15 0.23 0.64 5,430 Vendor 0.26 0.10 3.77 1.75 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,695 2,695 0.17 0.40 0.18 2,818 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 1.74 1.57 1.44 17.6 0.00 0.00 3.87 3.87 0.00 0.91 0.91 — 3,879 3,879 0.09 0.16 7.59 3,938 Vendor 0.19 0.07 2.64 1.24 0.01 0.03 0.49 0.52 0.03 0.14 0.16 — 1,930 1,930 0.12 0.29 2.18 2,020 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker 0.32 0.29 0.26 3.22 0.00 0.00 0.71 0.71 0.00 0.17 0.17 — 642 642 0.02 0.03 1.26 652 Vendor 0.03 0.01 0.48 0.23 < 0.005 < 0.005 0.09 0.09 < 0.005 0.02 0.03 — 319 319 0.02 0.05 0.36 334 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
302

Packet Pg. 369 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 21 / 54

3.11. Building Construction (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.35 1.13 10.4 13.0 0.02 0.43 — 0.43 0.40 — 0.40 — 2,398 2,398 0.10 0.02 — 2,406 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.35 1.13 10.4 13.0 0.02 0.43 — 0.43 0.40 — 0.40 — 2,398 2,398 0.10 0.02 — 2,406 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.96 0.80 7.46 9.31 0.02 0.31 — 0.31 0.28 — 0.28 — 1,713 1,713 0.07 0.01 — 1,719 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.18 0.15 1.36 1.70 < 0.005 0.06 — 0.06 0.05 — 0.05 — 284 284 0.01 < 0.005 — 285 Onsite
truck

Item 9: Staff Report
Pg.
303

Packet Pg. 370 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 22 / 54
——————————————————Daily,
Summer
(Max)
Worker 2.42 2.19 1.60 27.1 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,671 5,671 0.10 0.21 22.4 5,760 Vendor 0.25 0.10 3.40 1.64 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,650 2,650 0.15 0.38 7.02 2,775 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 2.18 2.12 2.03 23.2 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,253 5,253 0.13 0.23 0.58 5,325 Vendor 0.25 0.09 3.57 1.67 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,652 2,652 0.15 0.38 0.18 2,769 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 1.54 1.49 1.30 16.3 0.00 0.00 3.86 3.86 0.00 0.90 0.90 — 3,793 3,793 0.08 0.15 6.90 3,848 Vendor 0.18 0.07 2.51 1.19 0.01 0.03 0.49 0.52 0.03 0.14 0.16 — 1,894 1,894 0.10 0.27 2.17 1,980 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker 0.28 0.27 0.24 2.98 0.00 0.00 0.70 0.70 0.00 0.16 0.16 — 628 628 0.01 0.03 1.14 637 Vendor 0.03 0.01 0.46 0.22 < 0.005 < 0.005 0.09 0.09 < 0.005 0.02 0.03 — 314 314 0.02 0.05 0.36 328 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.13. Building Construction (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
304

Packet Pg. 371 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 23 / 54
2,405—0.020.102,3972,397—0.35—0.350.38—0.380.0213.09.851.071.28Off-Road Equipment
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.28 1.07 9.85 13.0 0.02 0.38 — 0.38 0.35 — 0.35 — 2,397 2,397 0.10 0.02 — 2,405 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.50 0.41 3.82 5.02 0.01 0.15 — 0.15 0.13 — 0.13 — 929 929 0.04 0.01 — 932 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.09 0.08 0.70 0.92 < 0.005 0.03 — 0.03 0.02 — 0.02 — 154 154 0.01 < 0.005 — 154 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 2.14 2.09 1.40 25.2 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,564 5,564 0.10 0.21 20.3 5,650 Vendor 0.25 0.08 3.23 1.58 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,604 2,604 0.15 0.38 6.35 2,728 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 2.08 1.85 1.83 21.5 0.00 0.00 5.47 5.47 0.00 1.28 1.28 — 5,154 5,154 0.13 0.23 0.53 5,226 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
305

Packet Pg. 372 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 24 / 54
Vendor 0.24 0.08 3.42 1.61 0.02 0.04 0.69 0.73 0.04 0.19 0.23 — 2,606 2,606 0.15 0.38 0.16 2,724 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.79 0.70 0.63 8.25 0.00 0.00 2.09 2.09 0.00 0.49 0.49 — 2,019 2,019 0.05 0.08 3.40 2,048 Vendor 0.09 0.03 1.29 0.62 0.01 0.01 0.27 0.28 0.01 0.07 0.09 — 1,009 1,009 0.06 0.15 1.06 1,056 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker 0.14 0.13 0.11 1.51 0.00 0.00 0.38 0.38 0.00 0.09 0.09 — 334 334 0.01 0.01 0.56 339 Vendor 0.02 0.01 0.24 0.11 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.02 — 167 167 0.01 0.02 0.18 175 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.15. Paving (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.91 0.76 7.12 9.94 0.01 0.32 — 0.32 0.29 — 0.29 — 1,511 1,511 0.06 0.01 — 1,516 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.91 0.76 7.12 9.94 0.01 0.32 — 0.32 0.29 — 0.29 — 1,511 1,511 0.06 0.01 — 1,516 Paving — 0.00 — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
306

Packet Pg. 373 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 25 / 54
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.11 0.10 0.90 1.25 < 0.005 0.04 — 0.04 0.04 — 0.04 — 190 190 0.01 < 0.005 — 191 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.02 0.02 0.16 0.23 < 0.005 0.01 — 0.01 0.01 — 0.01 — 31.5 31.5 < 0.005 < 0.005 — 31.6 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.05 0.05 0.03 0.57 0.00 0.00 0.12 0.12 0.00 0.03 0.03 — 126 126 < 0.005 < 0.005 0.46 128 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.05 0.04 0.04 0.49 0.00 0.00 0.12 0.12 0.00 0.03 0.03 — 117 117 < 0.005 0.01 0.01 118 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.01 0.01 < 0.005 0.06 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 — 14.9 14.9 < 0.005 < 0.005 0.03 15.1 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
307

Packet Pg. 374 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 26 / 54
Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 2.46 2.46 < 0.005 < 0.005 < 0.005 2.50 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.17. Architectural Coating (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.15 0.13 0.88 1.14 < 0.005 0.03 — 0.03 0.03 — 0.03 — 134 134 0.01 < 0.005 — 134 Architect
ural
Coatings
— 42.9 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.15 0.13 0.88 1.14 < 0.005 0.03 — 0.03 0.03 — 0.03 — 134 134 0.01 < 0.005 — 134 Architect
ural
Coatings
— 42.9 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
308

Packet Pg. 375 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 27 / 54
Off-Road
Equipment

0.09 0.08 0.52 0.68 < 0.005 0.02 — 0.02 0.01 — 0.01 — 79.2 79.2 < 0.005 < 0.005 — 79.4 Architect
ural
Coatings
— 25.5 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.02 0.01 0.10 0.12 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 13.1 13.1 < 0.005 < 0.005 — 13.2 Architect
ural
Coatings
— 4.65 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.48 0.44 0.32 5.41 0.00 0.00 1.09 1.09 0.00 0.26 0.26 — 1,134 1,134 0.02 0.04 4.48 1,152 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.44 0.42 0.41 4.64 0.00 0.00 1.09 1.09 0.00 0.26 0.26 — 1,051 1,051 0.03 0.05 0.12 1,065 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.25 0.25 0.22 2.71 0.00 0.00 0.64 0.64 0.00 0.15 0.15 — 630 630 0.01 0.03 1.15 639 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
309

Packet Pg. 376 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 28 / 54
Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker 0.05 0.05 0.04 0.49 0.00 0.00 0.12 0.12 0.00 0.03 0.03 — 104 104 < 0.005 < 0.005 0.19 106 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.19. Architectural Coating (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.15 0.12 0.86 1.13 < 0.005 0.02 — 0.02 0.02 — 0.02 — 134 134 0.01 < 0.005 — 134 Architect
ural
Coatings
— 42.9 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.15 0.12 0.86 1.13 < 0.005 0.02 — 0.02 0.02 — 0.02 — 134 134 0.01 < 0.005 — 134 Architect
ural
Coatings
— 42.9 — — — — — — — — — — — — — — — —
Onsite
truck

Item 9: Staff Report
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Off-Road
Equipment

0.06 0.05 0.35 0.46 < 0.005 0.01 — 0.01 0.01 — 0.01 — 54.6 54.6 < 0.005 < 0.005 — 54.8 Architect
ural
Coatings
— 17.6 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.01 0.01 0.06 0.08 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 9.04 9.04 < 0.005 < 0.005 — 9.07 Architect
ural
Coatings
— 3.21 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.43 0.42 0.28 5.04 0.00 0.00 1.09 1.09 0.00 0.26 0.26 — 1,113 1,113 0.02 0.04 4.06 1,130 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.42 0.37 0.37 4.31 0.00 0.00 1.09 1.09 0.00 0.26 0.26 — 1,031 1,031 0.03 0.05 0.11 1,045 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.17 0.15 0.13 1.74 0.00 0.00 0.44 0.44 0.00 0.10 0.10 — 426 426 0.01 0.02 0.72 432 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
311

Packet Pg. 378 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 30 / 54
Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker 0.03 0.03 0.02 0.32 0.00 0.00 0.08 0.08 0.00 0.02 0.02 — 70.6 70.6 < 0.005 < 0.005 0.12 71.6 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

4. Operations Emissions Details

4.1. Mobile Emissions by Land Use

4.1.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

13.7 12.8 8.09 100 0.26 0.14 26.7 26.9 0.13 6.77 6.90 — 26,643 26,643 1.00 1.01 54.4 27,022 Total 13.7 12.8 8.09 100 0.26 0.14 26.7 26.9 0.13 6.77 6.90 — 26,643 26,643 1.00 1.01 54.4 27,022 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

13.3 12.3 9.46 94.3 0.25 0.14 26.7 26.9 0.13 6.77 6.90 — 25,059 25,059 1.13 1.11 1.41 25,418 Total 13.3 12.3 9.46 94.3 0.25 0.14 26.7 26.9 0.13 6.77 6.90 — 25,059 25,059 1.13 1.11 1.41 25,418 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

2.27 2.10 1.54 15.9 0.04 0.02 4.58 4.60 0.02 1.16 1.18 — 3,978 3,978 0.17 0.17 3.70 4,036 Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
312

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Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 31 / 54
Total 2.27 2.10 1.54 15.9 0.04 0.02 4.58 4.60 0.02 1.16 1.18 — 3,978 3,978 0.17 0.17 3.70 4,036

4.2. Energy

4.2.1. Electricity Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00
Total — — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00
Total — — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00
Total — — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00

4.2.3. Natural Gas Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
313

Packet Pg. 380 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 32 / 54
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Total 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Total 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Total 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00

4.3. Area Emissions by Source

4.3.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Source TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Hearths 1.06 0.53 9.07 3.86 0.06 0.73 — 0.73 0.73 — 0.73 0.00 11,513 11,513 0.22 0.02 — 11,525 Consum
er
Products
— 18.9 — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
314

Packet Pg. 381 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 33 / 54
————————————————4.31—Architect
ural
Total 1.06 23.7 9.07 3.86 0.06 0.73 — 0.73 0.73 — 0.73 0.00 11,513 11,513 0.22 0.02 — 11,525 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Hearths 1.06 0.53 9.07 3.86 0.06 0.73 — 0.73 0.73 — 0.73 0.00 11,513 11,513 0.22 0.02 — 11,525 Consum
er
Products
— 18.9 — — — — — — — — — — — — — — — —
Architect
ural
Coatings
— 4.31 — — — — — — — — — — — — — — — —
Total 1.06 23.7 9.07 3.86 0.06 0.73 — 0.73 0.73 — 0.73 0.00 11,513 11,513 0.22 0.02 — 11,525 Annual — — — — — — — — — — — — — — — — — —
Hearths < 0.005 < 0.005 0.04 0.02 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 47.0 47.0 < 0.005 < 0.005 — 47.1 Consum
er
Products
— 3.45 — — — — — — — — — — — — — — — —
Architect
ural
Coatings
— 0.79 — — — — — — — — — — — — — — — —
Total < 0.005 4.23 0.04 0.02 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 47.0 47.0 < 0.005 < 0.005 — 47.1

4.4. Water Emissions by Land Use

4.4.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Item 9
Attachment E - Addendum to the
Comprehensive Plan EIR (November
2023)

Item 9: Staff Report
Pg.
315

Packet Pg. 382 of 511

Palo Alto HEU - GHG Emissions Detailed Report, 10/31/2023 34 / 54
Apartme
Mid Rise
— — — — — — — — — — — 89.6 0.00 89.6 0.31 0.20 — 156
Total — — — — — — — — — — — 89.6 0.00 89.6 0.31 0.20 — 156 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 89.6 0.00 89.6 0.31 0.20 — 156
Total — — — — — — — — — — — 89.6 0.00 89.6 0.31 0.20 — 156 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 14.8 0.00 14.8 0.05 0.03 — 25.8
Total — — — — — — — — — — — 14.8 0.00 14.8 0.05 0.03 — 25.8

4.5. Waste Emissions by Land Use

4.5.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 307 0.00 307 30.7 0.00 — 1,076
Total — — — — — — — — — — — 307 0.00 307 30.7 0.00 — 1,076 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
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1,076—0.0030.73070.00307———————————Apartme
nts
Total — — — — — — — — — — — 307 0.00 307 30.7 0.00 — 1,076 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 50.9 0.00 50.9 5.09 0.00 — 178
Total — — — — — — — — — — — 50.9 0.00 50.9 5.09 0.00 — 178

4.6. Refrigerant Emissions by Land Use

4.6.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — — — — — 6.32 6.32
Total — — — — — — — — — — — — — — — — 6.32 6.32
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — — — — — 6.32 6.32
Total — — — — — — — — — — — — — — — — 6.32 6.32
Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — — — — — 1.05 1.05
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Total — — — — — — — — — — — — — — — — 1.05 1.05

4.7. Offroad Emissions By Equipment Type

4.7.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.8. Stationary Emissions By Equipment Type

4.8.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
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Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.9. User Defined Emissions By Equipment Type

4.9.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10. Soil Carbon Accumulation By Vegetation Type

4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Vegetatio
n
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Item 9
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Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Species TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Item 9
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——————————————————Daily,
Summer
(Max)
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
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d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
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——————————————————Remove
d
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —

5. Activity Data

5.1. Construction Schedule
Phase Name Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Demolition Demolition 2/7/2023 4/18/2023 5.00 50.0 —
Site Preparation Site Preparation 4/19/2023 5/31/2023 5.00 30.0 — Grading Grading 6/1/2023 9/14/2023 5.00 75.0 —
Building Construction Building Construction 9/15/2023 7/17/2026 5.00 740 — Paving Paving 7/31/2026 10/3/2026 5.00 46.0 —
Architectural Coating Architectural Coating 3/4/2025 7/28/2026 5.00 366 —

5.2. Off-Road Equipment

5.2.1. Unmitigated
Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor Demolition Concrete/Industrial
Saws
Diesel Average 1.00 8.00 33.0 0.73
Demolition Excavators Diesel Average 3.00 8.00 36.0 0.38 Demolition Rubber Tired Dozers Diesel Average 2.00 8.00 367 0.40 Site Preparation Rubber Tired Dozers Diesel Average 3.00 8.00 367 0.40 Site Preparation Tractors/Loaders/Backh
oes
Diesel Average 4.00 8.00 84.0 0.37
Grading Excavators Diesel Average 2.00 8.00 36.0 0.38
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Grading Graders Diesel Average 1.00 8.00 148 0.41
Grading Rubber Tired Dozers Diesel Average 1.00 8.00 367 0.40 Grading Scrapers Diesel Average 2.00 8.00 423 0.48
Grading Tractors/Loaders/Backh
oes
Diesel Average 2.00 8.00 84.0 0.37
Building Construction Cranes Diesel Average 1.00 7.00 367 0.29 Building Construction Forklifts Diesel Average 3.00 8.00 82.0 0.20 Building Construction Generator Sets Diesel Average 1.00 8.00 14.0 0.74 Building Construction Tractors/Loaders/Backh
oes
Diesel Average 3.00 7.00 84.0 0.37
Building Construction Welders Diesel Average 1.00 8.00 46.0 0.45 Paving Pavers Diesel Average 2.00 8.00 81.0 0.42
Paving Paving Equipment Diesel Average 2.00 8.00 89.0 0.36 Paving Rollers Diesel Average 2.00 8.00 36.0 0.38
Architectural Coating Air Compressors Diesel Average 1.00 6.00 37.0 0.48

5.3. Construction Vehicles

5.3.1. Unmitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Demolition — — — —
Demolition Worker 15.0 11.7 LDA,LDT1,LDT2
Demolition Vendor — 8.40 HHDT,MHDT
Demolition Hauling 0.00 20.0 HHDT
Demolition Onsite truck — — HHDT
Site Preparation — — — —
Site Preparation Worker 17.5 11.7 LDA,LDT1,LDT2
Site Preparation Vendor — 8.40 HHDT,MHDT
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Site Preparation Hauling 0.00 20.0 HHDT
Site Preparation Onsite truck — — HHDT
Grading — — — —
Grading Worker 20.0 11.7 LDA,LDT1,LDT2
Grading Vendor — 8.40 HHDT,MHDT
Grading Hauling 0.00 20.0 HHDT
Grading Onsite truck — — HHDT
Building Construction — — — —
Building Construction Worker 662 11.7 LDA,LDT1,LDT2
Building Construction Vendor 98.2 8.40 HHDT,MHDT
Building Construction Hauling 0.00 20.0 HHDT
Building Construction Onsite truck — — HHDT
Paving — — — —
Paving Worker 15.0 11.7 LDA,LDT1,LDT2
Paving Vendor — 8.40 HHDT,MHDT
Paving Hauling 0.00 20.0 HHDT
Paving Onsite truck — — HHDT
Architectural Coating — — — —
Architectural Coating Worker 132 11.7 LDA,LDT1,LDT2
Architectural Coating Vendor — 8.40 HHDT,MHDT
Architectural Coating Hauling 0.00 20.0 HHDT
Architectural Coating Onsite truck — — HHDT

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies
Non-applicable. No control strategies activated by user.

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5.5. Architectural Coatings
Phase Name Residential Interior Area Coated
(sq ft)
Residential Exterior Area Coated
(sq ft)
Non-Residential Interior Area
Coated (sq ft)
Non-Residential Exterior Area
Coated (sq ft)
Parking Area Coated (sq ft)
Architectural Coating 2,542,752 847,584 0.00 0.00 —

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities
Phase Name Material Imported (cy) Material Exported (cy) Acres Graded (acres) Material Demolished (sq. ft.) Acres Paved (acres) Demolition 0.00 0.00 0.00 — —
Site Preparation — — 45.0 0.00 —
Grading — — 225 0.00 —
Paving 0.00 0.00 0.00 0.00 —

5.6.2. Construction Earthmoving Control Strategies
Non-applicable. No control strategies activated by user.

5.7. Construction Paving
Land Use Area Paved (acres) % Asphalt
Apartments Mid Rise — 0%

5.8. Construction Electricity Consumption and Emissions Factors kWh per Y ear and Emission Factor (lb/MWh)
Y ear kWh per Y ear CO2 CH4 N2O
2023 0.00 0.00 0.00 0.00
2024 0.00 0.00 0.00 0.00
2025 0.00 0.00 0.00 0.00
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2026 0.00 0.00 0.00 0.00

5.9. Operational Mobile Sources

5.9.1. Unmitigated
Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Y ear VMT/Weekday VMT/Saturday VMT/Sunday VMT/Y ear Apartments Mid Rise 4,999 4,512 3,759 1,734,678 37,869 34,180 28,472 13,139,958

5.10. Operational Area Sources

5.10.1. Hearths

5.10.1.1. Unmitigated
Hearth Type Unmitigated (number)
Apartments Mid Rise —
Wood Fireplaces 0
Gas Fireplaces 469
Propane Fireplaces 0
Electric Fireplaces 0
No Fireplaces 450
Conventional Wood Stoves 0
Catalytic Wood Stoves 0
Non-Catalytic Wood Stoves 0
Pellet Wood Stoves 0

5.10.2. Architectural Coatings
Residential Interior Area Coated (sq ft) Residential Exterior Area Coated (sq ft) Non-Residential Interior Area Coated (sq ft)
Non-Residential Exterior Area Coated
(sq ft)
Parking Area Coated (sq ft)
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2542752 847,584 0.00 0.00 —

5.10.3. Landscape Equipment
Season Unit Value
Snow Days day/yr 0.00
Summer Days day/yr 180

5.11. Operational Energy Consumption

5.11.1. Unmitigated
Electricity (kWh/yr) and CO2 and CH4 and N2O and Natural Gas (kBTU/yr) Land Use Electricity (kWh/yr) CO2 CH4 N2O Natural Gas (kBTU/yr) Apartments Mid Rise 5,506,344 0.00 0.0000 0.0000 0.00

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated
Land Use Indoor Water (gal/year) Outdoor Water (gal/year) Apartments Mid Rise 41,923,958 0.00

5.13. Operational Waste Generation

5.13.1. Unmitigated
Land Use Waste (ton/year) Cogeneration (kWh/year)
Apartments Mid Rise 571 —
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5.14. Operational Refrigeration and Air Conditioning Equipment

5.14.1. Unmitigated
Land Use Type Equipment Type Refrigerant GWP Quantity (kg) Operations Leak Rate Service Leak Rate Times Serviced Apartments Mid Rise Average room A/C &
Other residential A/C
and heat pumps
R-410A 2,088 < 0.005 2.50 2.50 10.0
Apartments Mid Rise Household refrigerators
and/or freezers
R-134a 1,430 0.12 0.60 0.00 1.00

5.15. Operational Off-Road Equipment

5.15.1. Unmitigated
Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor

5.16. Stationary Sources

5.16.1. Emergency Generators and Fire Pumps
Equipment Type Fuel Type Number per Day Hours per Day Hours per Y ear Horsepower Load Factor

5.16.2. Process Boilers
Equipment Type Fuel Type Number Boiler Rating (MMBtu/hr) Daily Heat Input (MMBtu/day) Annual Heat Input (MMBtu/yr)

5.17. User Defined
Equipment Type Fuel Type
— —
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5.18. Vegetation

5.18.1. Land Use Change

5.18.1.1. Unmitigated
Vegetation Land Use Type Vegetation Soil Type Initial Acres Final Acres

5.18.1. Biomass Cover Type

5.18.1.1. Unmitigated
Biomass Cover Type Initial Acres Final Acres

5.18.2. Sequestration

5.18.2.1. Unmitigated
Tree Type Number Electricity Saved (kWh/year) Natural Gas Saved (btu/year)

6. Climate Risk Detailed Report

6.1. Climate Risk Summary
Cal-Adapt midcentury 2040–2059 average projections for four hazards are reported below for your project location. These are under Representation Concentration Pathway (RCP) 8.5 which assumes GHG emissions will continue to rise strongly through 2050 and then plateau around 2100.

Climate Hazard Result for Project Location Unit
Temperature and Extreme Heat 11.8 annual days of extreme heat Extreme Precipitation 4.05 annual days with precipitation above 20 mm Sea Level Rise 0.00 meters of inundation depth
Wildfire 10.7 annual hectares burned
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Temperature and Extreme Heat data are for grid cell in which your project are located. The projection is based on the 98th historical percentile of daily maximum/minimum temperatures from observed historical data (32 climate model ensemble from Cal-Adapt, 2040–2059 average under RCP 8.5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.

Extreme Precipitation data are for the grid cell in which your project are located. The threshold of 20 mm is equivalent to about ¾ an inch of rain, which would be light to moderate rainfall if received over a full day or heavy rain if received over a period of 2 to 4 hours. Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.

Sea Level Rise data are for the grid cell in which your project are located. The projections are from Radke et al. (2017), as reported in Cal-Adapt (Radke et al., 2017, CEC-500-2017-008), and consider inundation location and depth for the San Francisco Bay, the Sacramento-San Joaquin River Delta and California coast resulting different increments of sea level rise coupled with extreme storm events.

Users may select from four scenarios to view the range in potential inundation depth for the grid cell. The four scenarios are: No rise, 0.5 meter, 1.0 meter, 1.41 meters Wildfire data are for the grid cell in which your project are located. The projections are from UC Davis, as reported in Cal-Adapt (2040–2059 average under RCP 8.5), and consider historical data of climate, vegetation, population density, and large (> 400 ha) fire history. Users may select from four model simulations to view the range in potential wildfire probabilities for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CM5), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIROC5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi.

6.2. Initial Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score Temperature and Extreme Heat N/A N/A N/A N/A
Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise N/A N/A N/A N/A
Wildfire N/A N/A N/A N/A
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation N/A N/A N/A N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.

The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.

The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.

6.3. Adjusted Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score Temperature and Extreme Heat N/A N/A N/A N/A
Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise N/A N/A N/A N/A
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Wildfire N/A N/A N/A N/A
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation N/A N/A N/A N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.

The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.

6.4. Climate Risk Reduction Measures

7. Health and Equity Details

7.1. CalEnviroScreen 4.0 Scores
The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.

Indicator Result for Project Census Tract
Exposure Indicators —
AQ-Ozone 10.6
AQ-PM 15.6
AQ-DPM 54.0
Drinking Water 38.1
Lead Risk Housing 68.1
Pesticides 0.00
Toxic Releases 28.4
Traffic 30.2
Effect Indicators —
CleanUp Sites 73.7
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Groundwater 91.9
Haz Waste Facilities/Generators 51.9
Impaired Water Bodies 23.9
Solid Waste 0.00
Sensitive Population —
Asthma 0.66
Cardio-vascular 4.54
Low Birth Weights 36.4
Socioeconomic Factor Indicators —
Education 3.87
Housing 22.1
Linguistic 24.8
Poverty 8.07
Unemployment 29.4

7.2. Healthy Places Index Scores
The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.

Indicator Result for Project Census Tract
Economic —
Above Poverty 95.14949313
Employed 43.98819453
Median HI 99.29423842
Education —
Bachelor's or higher 99.60220711
High school enrollment 100
Preschool enrollment 73.48902862
Transportation —
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Auto Access 68.11240857
Active commuting 83.57500321
Social —
2-parent households 94.40523547
Voting 96.57384833
Neighborhood —
Alcohol availability 81.20107789
Park access 81.35506224
Retail density 46.32362376
Supermarket access 56.22994996
Tree canopy 94.4180675
Housing —
Homeownership 63.76235083
Housing habitability 86.19273707
Low-inc homeowner severe housing cost burden 41.33196458 Low-inc renter severe housing cost burden 96.25304761
Uncrowded housing 87.19363531
Health Outcomes —
Insured adults 99.75619145
Arthritis 0.0
Asthma ER Admissions 96.2
High Blood Pressure 0.0
Cancer (excluding skin) 0.0
Asthma 0.0
Coronary Heart Disease 0.0
Chronic Obstructive Pulmonary Disease 0.0
Diagnosed Diabetes 0.0
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Life Expectancy at Birth 97.7
Cognitively Disabled 80.8
Physically Disabled 96.9
Heart Attack ER Admissions 93.0
Mental Health Not Good 0.0
Chronic Kidney Disease 0.0
Obesity 0.0
Pedestrian Injuries 19.6
Physical Health Not Good 0.0
Stroke 0.0
Health Risk Behaviors —
Binge Drinking 0.0
Current Smoker 0.0
No Leisure Time for Physical Activity 0.0
Climate Change Exposures —
Wildfire Risk 0.0
SLR Inundation Area 95.8
Children 64.0
Elderly 25.8
English Speaking 76.2
Foreign-born 51.5
Outdoor Workers 79.5
Climate Change Adaptive Capacity —
Impervious Surface Cover 86.7
Traffic Density 34.0
Traffic Access 87.4
Other Indices —
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Hardship 0.9
Other Decision Support —
2016 Voting 98.7

7.3. Overall Health & Equity Scores
Metric Result for Project Census Tract
CalEnviroScreen 4.0 Score for Project Location (a) 7.00 Healthy Places Index Score for Project Location (b) 99.0 Project Located in a Designated Disadvantaged Community (Senate Bill 535) No Project Located in a Low-Income Community (Assembly Bill 1550) No Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.

7.4. Health & Equity Measures
No Health & Equity Measures selected.

7.5. Evaluation Scorecard
Health & Equity Evaluation Scorecard not completed.

7.6. Health & Equity Custom Measures
No Health & Equity Custom Measures created.

8. User Changes to Default Data
Screen Justification
Land Use Pursuant to DOF 2.51 residents per household, consistent with Pop and Housing Construction: Construction Phases Architectural coating occurs simultaneously as building construction Construction: Architectural Coatings BAAQMD Regulation 8 Rule 3, Nonflat Coating Operations: Architectural Coatings BAAQMD Regulation 8 Rule 3, Nonflat Coating Item 9
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Operations: Energy Use Pursuant to Palo Alto's All-Electric Ordinance, natural gas converted to electricity Operations: Water and Waste Water WTP 100% aerobic
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Appendix

C
Native American
Tribal Correspondence
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(November 2023)

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September 29, 2022
Amah Mutsun Tribal Band
Valentin Lopez, Chairperson
PO Box 5272
Galt, California 95632
Via Email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson Lopez:

The City of Palo Alto , acting as the lead agency in accordance with the California Environmental Quality Act, is preparing a Supplemental EIR for its 2023-31 Housing Element Update. The proposed project consists of a complete update to the Housing Element and related edits to the City’s Comprehensive Plan Land Use Element and Palo Alto Municipal Code.

The Housing Element is one of the seven state -mandated elements of the local Comprehensive Plan and is required to be updated every eight years. The City of Palo Alto is preparing the 2023-2031 Housing Element Update to comply with the legal mandate that requires each local government to identify adequate sites for housing to meet the existing and projected housing needs for varying income -levels in the community. It is intended to provide the city with a comprehensive strategy for promoting the production of safe, decent and affordable housing, and affirmatively furthering fair housing during the housing cycle. The Housing Element Update establishes goals, policies, and actions to address the existing and projected housing needs in Palo Alto . O verall, the City’s zoning and other land use regulations must accommodate at least 6,695 new units during the 8 -year planning period in order to demonstrate to the State Department of Housing and Community Development(HCD) that the City’s Housing Element has identified adequate land use capacity and implementing policies to accommodate its Regional Housing Needs Allocation (RHNA) in addition to the identified “buffer” of 10 percent above its RHNA . By comparison, the 2017 Comprehensive Plan anticipated—and the Comprehensive Plan Environmental Impact Report evaluated —the addition of 3,545 to 4,420 .

Although no development is specifically proposed as part of the Housing Element Update , the City’s CEQA analysis will evaluate the potential buildout of these housing units within the boundaries of the City of Palo Alto. The Housing Element will also identify a list of Housing Inventory Sites which reflect the sites within the City as the highest likelihood of housing redevelopment in order to accommodate the RHNA. A map of the jurisdictions boundaries as well as a list of the draft Housing Inventory Sites is attached.

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representativ e of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Amah Mutsun Tribal Band is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52 ) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

If you wish to engage in consultation under AB 52 (California Public Resources Code § 21080.3.1) for t his or future projects, you may submit a written request for notification of proposed projects. In accordance with AB 52 your tribe has 30 days from receipt of this letter to respond in writing if you wish to consult on the proposed project. Under the provisions of SB 18, your tribe has 90 days from receipt of this letter to respond in writing if you wish to consult on the proposed project. Therefore, the City respectfully requests receipt of any questions or comments on this project Item 9
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Addendum to the
Comprehensive Plan EIR
(November 2023)

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within 90 days of receipt of this letter. If you require any additional information or have any questions, please contact me at (650) 289-2493 or via e-mail at [email protected]. Thank you for your assistance.

Sincerely,

Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

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September 29, 2022
Amah Mutsun Tribal Band of Mission San Juan Bautista
Irene Zwierlein, Chairperson
3030 Soda Bay Road
Lakeport, California 95453
Via email: [email protected]

Dear Chairperson, Zwierlein:

The Housing Element is one of the seven state -mandated elements of the local Comprehensive Plan and is required to be updated every eight years. The City of Palo Alto is preparing the 2023-2031 Housing Element Update to comply with the legal mandate that requires each local government to identify adequate sites for housing to meet the existing and projected housing needs for varying income -levels in the community. It is intended to provide the city with a comprehensive strategy for promoting the production of safe, decent and affordable housing, and affirmatively furthering fair housing during the housing cycle. The Housing Element Update establishes goals, policies, and actions to address the existing and projec ted housing needs in Palo Alto . O verall, the City’s zoning and other land use regulations must accommodate at least 6,695 new units during the 8 -year planning period in order to demonstrate to the State Department of Housing and Community Development(HCD) that the City’s Housing Element has identified adequate land use capacity and implementing policies to accommodate its Regional Housing Needs Allocation (RHNA) in addition to the identified “buffer” of 10 percent above its RHNA . By comparison, the 2017 Com prehensive Plan anticipated—and the Comprehensive Plan Environmental Impact Report evaluated —the addition of 3,545 to 4,420 .

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Amah Mutsun Tribal Band of Mission San Juan Bautista is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

If you wish to engage in consultation under AB 52 (California Public Resources Code § 21080.3.1) for t his or future projects, you may submit a written request for notification of proposed projects. In accordance with AB 52 your tribe has 30 days from receipt of this letter to respond in writing if you wish to consult on the proposed project. Under the provisions of SB 18, your tribe has 90 days from receipt of this letter to respond in writin g if you wish to consult on the proposed project. Therefore, the City respectfully requests receipt of any questions or comments on this project within 90 days of receipt of this letter. If you require any additional information or have any questions, please contact me at (650) 289-2493 or via e-mail at [email protected] . Thank you for your assistance.

Sincerely,
Item 9
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(November 2023)

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Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
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Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
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September 29, 2022
Indian Canyon Mutsun Band of Costanoan
Kanyon Sayers-Roods, MLD Contact
1615 Pearson Court
San Jose, California 95122
Via email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson Sayers-Roods:

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of Indian Canyon Mutsun Band of Costanoan is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

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Sincerely,

Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

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September 29, 2022
Indian Canyon Mutsun Band of Costanoan
Ann Marie Sayers, Chairperson
P.O. Box 28
Hollister, California 95024
Via email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson Marie Sayers:

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Indian Canyon Mutsun Band of Costanoan is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

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Sincerely,

Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
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September 29, 2022
Muwekma Ohlone Indian Tribe of the SF Bay Area
Monica Arellano, Vice Chairwoman
20885 Redwood Road, Suite 232
Castro Valley, California 94546
Via email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson Arellano:

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Muwekma Ohlone Indian Tribe of the SF Bay Area is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

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Sincerely,

Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

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September 29, 2022
The Ohlone Indian Tribe
Andrew Galvan
P.O. Box 3388
Fremont, California 94539
Via email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson Galvan:

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided you r name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Ohlone Indian Tribe is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

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Sincerely,

Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
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September 29, 2022
Wuksache Indian Tribe/Eshom Valley Band
Kenneth Woodrow, Chairperson
1179 Rock Haven Ct.

Salinas, California 93906
Via email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson Woodrow:

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Wuksache Indian Tribe/Eshom Valley Band is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

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Sincerely,

Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
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June 21, 2022

Tamien Nation
Quirina Luna Geary, Chairperson
P.O. Box 8053
San Jose, California 95155
Via email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson Geary:

The City of Palo Alto, acting as the lead agency in accordance with the California Environmental Quality Act, is preparing a Supplemental EIR for its 2023- 31 Housing Element Update. The proposed project consists of a complete update to the Housing Element and related edits to the City’s Comprehensive Plan Land Use Element and Palo Alto Municipal Code.

The Housing Element is one of the seven state -mandated elements of the local Comprehensive Plan and is required to be updated every eight years. The City of Palo Alto is preparing the 2023-2031 Housing Element Update to comply with the legal mandate that requires each local government to identify adequate sites for housing to meet the existing and projected housing needs for varying income -levels in the commun ity. It is intended to provide the city with a comprehensive strategy for promoting the production of safe, decent and affordable housing, and affirmatively furthering fair housing during the housing cycle. The Housing Element Update establishes goals, pol icies, and actions to address the existing and projected housing needs in Palo Alto . O verall, the City’s zoning and other land use regulations must accommodate at least 6,695 new units during the 8 -year planning period in order to demonstrate to the State Department of Housing and Community Development (HCD) that the City’s Housing Element has identified adequate land use capacity and implementing policies to accommodate its Regional Housing Needs Allocation (RHNA) in addition to the identified “buffer” of 10 percent above its RHNA . By comparison, the 2017 Comprehensive Plan anticipated —and the Comprehensive Plan Environmental Impact Report evaluated —the addition of 3,545 to 4,420. Although no development is specifically proposed as part of the Housing Element Update, the City’s CEQA analysis will evaluate the potential buildout of these housing units within the boundaries of the City of Palo Alto. The Housing Element will also identify a list of Housing Inventory Sites which reflect the sites within the City as the highest likelihood of housing redevelopment in order to accommodate the RHNA. A map of the jurisdictions boundaries as well as a list of the draft Housing Inventory Sites is attached.

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Tamien Nation is important to the City of Palo Alto’s plan ning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially provide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

In accordance with AB 52 your tribes have 30 days from receipt of this letter to respond in writing if you wish to consult on the proposed p roject. Under the provisions of SB 18, your tribe has 90 days from receipt of this letter to respond in writing if you wish to consult on the proposed project. Therefore, the City respectfully requests receipt of any questions or comments on this project w ithin 90 days of receipt of this letter. If you require any additional Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
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information or have any questions, please contact me at (650) 329-2493 or via e-mail at [email protected].

Thank you for your assistance.

Sincerely,

Tim Wong
Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
Pg.
353

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Tamien Nation September 29, 2022
Johnathan Wasaka Costillas, THPO
P.O. Box 866
Clearlake Oaks, California 94523
Via email: [email protected]

RE: Assembly Bill 52 and Senate Bill 18 Consultation, City of Palo Alto 2023-31 Housing Element Update, Palo Alto, California

Dear Chairperson, Costillas:

The Housing Element is one of the seven state -mandated elements of the local Comprehensive Plan and is required to be updated every eight years. The City of Palo Alto is preparing the 2023-2031 Housing Element Update to comply with the legal mandate that requires each local government to identify adequate sites for housing to meet the existing and projected housing needs for varying income -levels in the community. It is intended to provide the city with a comprehensive strategy for promoting the production of safe, decent and affordable housing, and affirmatively furthering fair housing during the housing cycle. The Housing Element Update establishes goals, policies, and actions to address the existing and projected housing needs in Palo Alto . O verall, the City’s zoning and other land use regulations must accommodate at least 6,695 new units during the 8 -year planning period in order to demonstrate to the State Department of Housing and Community Development (HCD) that the City’s Housing Element has identified adequate land use capacity and implementing policies to accommodate its Regional Housing Needs Allocation (RHNA) in addition to the identified “buffer” of 10 percent above its RHNA . By comparison, the 2017 Comprehensive Plan anticipated —and the Comprehensive Plan Environmental Impact Report evaluated —the addition of 3,545 to 4,420. Although no development is specifically proposed as part of the Housing Element Update, the City’s CEQA analysis will evaluate the potential buildout of these housing units within the boundaries of the City of Palo Alto. The Housing Element will also identify a list of Housing I nventory Sites which reflect the sites within the City as the highest likelihood of housing redevelopment in order to accommodate the RHNA. A map of the jurisdictions boundaries as well as a list of the draft Housing Inventory Sites is attached.

The City of Palo Alto is sending this letter because the Native American Heritage Commission has provided your name as a representative of a tribe that is traditionally and culturally affiliated with the geographic area of the proposed project. The input of the Tamien Nation is important to the City of Palo Alto’s planning process and we invite you to engage in scoping consultation pursuant to Government Code §65352.4 (Assembly Bill 52) and Government Code § 65352.3– 65352.4 (Senate Bill 18) or to confidentially prov ide any information you have regarding Native American cultural resources located in or near the proposed project area that may be affected by project activities.

If you wish to engage in consultation under AB 52 (California Public Resources Code § 21080.3 .1) for this or future projects, you may submit a written request for notification of proposed projects. In accordance with AB 52 your tribe has 30 days from receipt of this letter to respond in writing if you wish to consult on the proposed project. Under the provisions of SB 18, your tribe has 90 days from receipt of this letter to respond in writing if you wish to consult on the proposed project. Therefore, the City respectfully requests receipt of any questions or comments on this project within 90 days of receipt of this letter. If you require any additional information or have any questions, please contact me at (650) 329-2493 or via e-mail at [email protected] . Thank you for your assistance.

Sincerely,

Tim Wong
Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
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Senior Planner
City of Palo Alto, Planning and Development Services Department

Enclosure:

Regional Location Map

Item 9
Attachment E -
Addendum to the
Comprehensive Plan EIR
(November 2023)

Item 9: Staff Report
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City Council
Staff Report
From: City Manager
Report Type: ACTION ITEMS
Lead Department: Planning and Development Services
Meeting Date: November 13, 2023
Report #:2309-2006
TITLE
PUBLIC HEARING / QUASI-JUDICIAL. 575 Los Trancos Road [21PLN-00196] Request for Major Site and Design Review to Allow the Construction of a new 7,110 sf single-family residence with a new 895 sf Accessory Dwelling Unit and Associated Site Improvements, Including a Swimming Pool, on a 5.38-acre Site. Environmental Assessment: A Mitigated Negative Declaration has been prepared for the proposed project. Zoning District: OS (Open Space).

RECOMMENDATION
Staff Recommends the City Council take the following action(s):

1. Approve the Final Mitigated Negative Declaration and Mitigation Monitoring and Reporting Plan

2. Approve the proposed project based on findings and subject to conditions of approval.

EXECUTIVE SUMMARY
The applicant proposes to construct a new single family home and accessory dwelling unit on a vacant property in the foothills. Because of its location, a site and design review application is required. Earlier this year the City Council remanded the project back to the Planning and Transportation Commission to address concerns related to potential impacts to the intermittent stream and riparian corridor. The Commission has reviewed the project revisions and recommends approval.

BACKGROUND
The subject application for site and design review was filed in July 2021 and is required due to the project’s location in an environmentally sensitive location in the foothills. The Planning and Transportation Commission (PTC) reviewed the project in August 20221 and made a recommendation to approve the new single family home and accessory dwelling unit on a vacant lot off Los Trancos Road and in proximity to an intermittent stream. 1 August 31, 2022 Planning and Transportation Commission Report:
https://www.cityofpaloalto.org/files/assets/public/agendas-minutes-reports/agendas-minutes/planning-and- transportation-commission/2022/ptc-08.31.2022-575-los-trancos.pdf.

Item 10
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The City Council in January 23, 20232,3 considered the project and the Commission’s recommendation and was unable to make all of the site and design review findings. Specifically, the Council (4-2; Lythcott-Haims, Tanaka) remanded the project back to the PTC to address the following:
a) Evaluate a project design that provides for an approximate 50-foot setback from the top of bank;
b) Effective bird-safe glazing treatment of all glass surfaces achieving the American Bird Conservancy Threat Factor rating of 15;
c) Eliminate fencing that could impede wildlife movement along the creek; d) Minimize nighttime lighting along the riparian corridor and allow only minimal lighting in all other locations. Lighting should not interfere with wildlife movement through the landscape, and all outdoor lighting should be limited to Correlated Color Temperature of 2700 Kelvin or less, and extinguished at 11 P.M.; and,
e) Pool should be covered and fenced in a way that ensures that small animals, such as amphibians and reptiles cannot enter the swimming pool.

The City Council also directed staff to return with a plan and timeline to amend the zoning code to address Comprehensive Plan Policy N.3.3 (Protection of Creeks). On this last point, the City Council authorized funding for staff to hire a consultant to complete this work in 2024. Staff is currently working on securing a consultant to prepare this work.

On August 9, 2023,4,5 the PTC reviewed a revised project that reflects the applicant’s efforts to address Council’s concerns. These project plans included a new home setback of at least 49 feet from the stream’s top of bank, but the swimming pool setback ranged from 28'8" to 45'9" from the top of bank. The PTC discussed the pool’s location and ultimately made a recommendation to approve the project with the following points or conditions:
The PTC recommendation neither supported nor opposed the pool location; Modify the conditions of approval to include best practices to prevent Sudden Oak Death; to require that tools be disinfected and cleaned prior to coming on site and that no materials shall be relocated to portions of the parcel that are not part of the construction for any reason; and,
2 January 23, 2023 Council Report:
https://cityofpaloalto.primegov.com/meetings/ItemWithTemplateType?id=851&meetingTemplateType=2. 3 January 23, 2023 Council Action Minutes:
https://cityofpaloalto.primegov.com/Public/CompiledDocument?meetingTemplateId=1066&compileOutputType=

1. 4 August 9, 2023 Planning and Transportation Commission Report:
https://www.cityofpaloalto.org/files/assets/public/agendas-minutes-reports/agendas-minutes/planning-and- transportation-commission/2023/ptc-8.09-575-los-trancos.pdf. 5 August 9, 2023 Planning and Transportation Commission Summary Minutes:
https://www.cityofpaloalto.org/files/assets/public/v/2/agendas-minutes-reports/agendas-minutes/planning-and- transportation-commission/2023/ptc-8.9.2023-summary2.pdf.

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Modify the conditions of approval to “ensure that any excavated soils not be relocated to portions of the parcel that are not part of the construction for any reason, no storage in riparian setback”.

The latter two approval condition modifications have been incorporated as Conditions #7 and #8 accordingly.

ANALYSIS
The City Council previously was unable to make required findings to approve the subject application. The Council remanded the project to the PTC to address specific issues. Each of those topics and the applicant’s response are provided below:

Top of Bank Setback
The City Council requested the project design be evaluated to provide for an approximately 50- foot setback from the top of bank. The applicant responded with building wall setbacks ranging from 49' to approximately 100’. Some building roof overhangs project into the 50-foot setback by approximately three feet. To achieve this footprint reduction, the second story floor plate increased by nearly 1,200 square feet, while the overall project floor area decreased by approximately 135 square feet.

After receiving the PTC’s approval recommendation, staff had a follow up conversation with the applicant encouraging a design modification to increase the pool setback. The applicant responded with revised plans showing an additional four-foot setback from the stream’s top of bank, resulting in a pool setback ranging from 32'8" to 51'1".

Bird Safety Glass
The City Council requested effective bird-safe glazing treatment of all glass surfaces with the intent to achieve the American Bird Conservancy Threat Factor rating of 15.

The project has been revised to eliminate all but one small upper-level window from the building façade facing the creek. Other non-egress windows on the second story have decorative wood slat screens which will decrease the likelihood of bird strikes. Three egress windows are not behind screens on the front facade, as they are required to be operable and unblocked for fire safety. There are several other side-facing, non-operable windows that are unscreened, such as in the stairway and at the master bedroom balcony. Most of the other unscreened windows are recessed into the building articulation, below deep roof overhangs, which reduce the risk of bird strikes from the windows being shaded. The stairway window is behind a large tree. The wood screen slats are 1.5 inches wide, 4 inches deep (projecting from window), and with 4 inches between the slats. This is equivalent to a threat factor of 25, which reduces the risk of bird strikes by more than 50%.

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The American Bird Conservancy established guidelines6 describing how to meet an ABC rating of 20, which includes acid etched glass, opaque, or less than 15% reflective and has a visual pattern (such as dots, stripes, etc.) that are at least 1/8 inches wide and no more than 2 inches apart vertically and horizontally. The guidance document does not include a definition for a rating of 15, but their website assigned a rating of 15 to materials such as glass with 5mm (larger than 1/8 inch) etched dots in a two-inch array, or 6 mm dots spaced 10 mm on center covering 25% of the surface of the glass.

While the project redesign reduces the risk of bird strikes, it falls short of the Council’s intended standard (ABC Threat Factor 15). The PTC discussed this topic during the hearing and noted that an ABC rating of 20 or 25 is more easily achieved, because there are more products available at these ratings. Moreover, many preventive measures to reduce bird strikes focus on commercial development with large windowpanes and the ability to see through portions of some buildings. For the subject redesigned residential building, efforts were made to reduce bird strikes by using screens, recessed windows and building modulation. The PTC did not request any changes to the project related to bird safety. If the City Council were to approve the project and wanted to see the more stringent standards adhered to, then a condition could be imposed with specific direction.

While staff is currently working on an ordinance to propose new bird safe glass standards, no such standards currently exist or apply to the subject project.

Fencing Near Creek
The City Council requested the elimination of fencing that could impede wildlife movement along the creek.

No fencing is proposed for the majority of the property. An automatic safety cover will be used on the pool to meet the requirements of the Swimming Pool Safety Act; this pool cover is in place of a perimeter fence. Additionally, an approximately 55-foot-long wall is proposed to block vehicle headlights from shining towards the creek.

No other fences are proposed. A condition of approval has been added to the record of land use action following the PTC’s review, imposing restrictions on future fencing.

Outdoor Lighting
The City Council sought to minimize nighttime lighting along the riparian corridor and to restrict outdoor lighting to a Correlated Color Temperature of 2700 Kelvin or less and to have outdoor lighting turn off by 11 P.M., so as to not interfere with wildlife movement As noted above, the number of windows facing the creek has been reduced, thereby reducing the amount of glare from windows toward the riparian corridor. Additionally, light fixtures have 6 American Bird Conservancy Threat Rating System: https://dariuszzdziebk.wpenginepowered.com/wp- content/uploads/2023/06/What-is-a-Material-Threat-Factor-January-2023.pdf.

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been moved away from windows to more interior locations in the rooms; windows will also have shades, but these are not set to a timer and cannot be relied upon as an effective means to minimize glare.

A light shield wall has been added to the driveway to reduce light from vehicle headlights from reaching the creek (Plan Sheet L1.00).

The record of land use action has been updated (Condition 8) to specify the Correlated Color Temperature of 2700 Kelvin or less requirement and the programmed shut off time by 11:00 P.M.

Pool Covering
The City Council wanted to ensure the pool covering was adequate to prevent small animals, such as amphibians and reptiles, from entering the swimming pool. The pool now includes an automatic safety cover that will meet the requirements of the Swimming Pool Safety Act. If animals attempt to enter the pool, the cover provides a surface that makes it easier to escape and return to their habitat.

FISCAL/RESOURCE IMPACT
There are no significant fiscal or resource impacts associated with the recommendation in this report. Site and design review applications are cost-recovery projects.

STAKEHOLDER ENGAGEMENT
As of the writing of this report, no new comments were received. Prior comments have been attached to the PTC and prior Council staff reports.

ENVIRONMENTAL REVIEW
The subject project has been assessed in accordance with the authority and criteria contained in the California Environmental Quality Act (CEQA), the State CEQA Guidelines, and the environmental regulations of the City. Specifically, a draft IS/MND was prepared and circulated from August 17, 2022 until September 16, 2022. Three comment letters were received and a Response to Comments, as well as the Final IS/MND has been prepared and was published prior to the August 9, 2023 Planning and Transportation Commission meeting. The final IS/MND included updates based on changes to the project made after circulation, comments received, and to clarify information. Corrections and additional text are shown as track changes in the text of the Final IS/MND. No additional changes have been made since this publication.

In no case did the project revisions, any of the public comments or the changes made to the IS/MND result in or identify new significant impacts or new, avoidable significant effects compared to the impacts identified in the Draft IS/MND. Because none of the revisions to the IS/MND are “substantial” as defined in CEQA Guidelines Section 15073.5(b) and the information added merely clarifies and amplifies the information previously provided in the analysis, recirculation of the IS/MND is not required.

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ATTACHMENTS
Attachment A: Location Map
Attachment B: Zoning Comparison Table
Attachment C: Draft Record of Land Use
Attachment D: Link to Project Plans and CEQA
APPROVED BY:

Jonathan Lait, Planning and Development Services Director Item 10
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182-46-012
182-38-030
182-36-022

LOS TRANCOS ROAD

TIERRA ARBOLES
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575
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This map is a product of the
City of Palo Alto GIS
This document is a graphic representation only of best available sources.

Legend
Assessment Parcel Palo Alto
Assessment Parcel Palo Alto
Assessment Parcel Outside Palo Alto
abc Road Centerline Small Text (TC)
Curb Face (RF)
Pavement Edge (RF)
abc Address Label (AP)
Current Features
City Jurisdictional Limits (PL):

Districts
0' 151'
Attachment A
Location Map
575 Los Trancos Road

CITY OF PALO ALTO
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CAL I FORN IA
P a l o A l t o
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4 The City of Palo Alto assumes no responsibility for any errors. ©1989 to 2016 City of Palo Alto efoley2, 2022-08-23 14:25:39
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1 7
6 ATTACHMENT B

ZONING COMPARISON TABLE
575 Los Trancos Road 21PLN-00196
Table 1a: COMPARISON WITH CHAPTER 18.28 (OS DISTRICT)
OS Residential Development Standards
Regulation Required Existing Proposed
Minimum Site Area, Width
and Depth
Area: 10 acres
Width: No standard
Depth: No standard
Area: 5.38 acres
Width: more than
1300 feet
Depth: varies, 40-250
feet
No change
Front Yard 30 feet N/A 88 feet 10 inches
minimum
Street Side Yard 30 feet N/A N/A
Rear Yard 30 feet, and 20 feet
from creek top of bank
N/A Varies, 49 feet from top
of bank, minimum
Interior Side Yard 30 feet N/A Right: approx. 250 ft
Left: approx. 154 ft
Max. Building Height 25 feet N/A 22 feet
Maximum Impervious
Coverage
4% (9,374 sf) N/A 7,313 sf (5,617 sf
buildings, 1,696
hardscape)
Max. Total Floor Area Ratio 4% (9,374 sf) N/A 8,005 sf (7,110 main house, 895 sf ADU)
Table 1b: CONFORMANCE WITH CHAPTER 18.52 (Off-Street Parking and Loading) Single Family Residential Uses (Tandem Parking Allowed) Type Required Existing Proposed
Vehicle Parking 4 spaces, of which one
must be covered
N/A 3 covered spaces, 1
uncovered space
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Palo Alto City CouncilNovember 13, 2023

Palo Alto City Council
November 13, 2023