AGENDA
MUNICIPAL SERVICES COMMITTEE
REGULAR MEETING NOTICE
OCTOBER 28, 2025
PUBLIC MEETING 4:00 P.M.
MEMBERS
Justin Jones, Chair, District 3
Rick Cole, Councilmember, District 2
Tyron Hampton, Councilmember, District 1
Jason Lyon, Councilmember, District 7
STAFF
David Reyes, General Manager
Lisa Hosey, Assistant City Attorney
Betty Gao, Recording Secretary
MISSION STATEMENT
The City of Pasadena is dedicated to delivering exemplary municipal services, responsive to our entire community and consistent
with our history, culture and unique character.
I
n compliance with the Americans with Disabilities Act of 1990, Assistive Listening Devices are available from the City Clerk’s Office with a 24-hour advance notice.
Please call (626) 744-4124 to request use of a listening device.
Language translation services are available for this meeting by calling (626) 74
4-4124 at least 24 hours in advance.
Habrá servicio de interpretación disponible para éstas juntas llamando al (626) 74
4-4124 por lo menos con 24 horas de anticipación.
I
tems on the agenda may not be called in order listed.
Agendas and supporting documents are available on the Internet at http://ww5.cityofpasadena.net/commissions/city-council-municipal-services-committee/ Materials related to an item on this Agenda submitted to the Municipal Services Committee after distribution of the agenda packet will be posted online and listed as: “Supplemental Agenda Material Received after the Posting of the agenda”.
PUBLIC COMMENT AT THE MUNICIPAL SERVICES COMMITTEE MEETING FOR OCTOBER 28, 2025, AT 4:00 P.M. WILL BE ACCEPTED IN-PERSON AND BY VIDEOCONFERENCE/TELECONFERENCE.
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Computer or electronic devices, join the meeting at: cityofpasadena.net/cczoom Telephone only dial-in: 1-669-900-6833, Meeting ID: 161 482 446
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4. Members of the public may submit correspondence of any length prior to the start of the meeting, at the following email address:
c
[email protected]
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orrespondence will be forwarded to the Committee prior to the start of the meeting, posted online, and made part of the legislative record for the item.
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CITY OF PASADENA
REGULAR MEETING OF
THE MUNICIPAL SERVICES COMMITTEE
OCTOBER 28, 2025
PUBLIC MEETING: 4:00 PM
PASADENA CITY HALL, COUNCIL CHAMBER
100 NORTH GARFIELD AVENUE, ROOM S249
NO
TICE IS HEREBY GIVEN that the regular meeting of the Municipal Services Committee will be held on Tuesday, October 28, 2025, at 4:00 p.m., to discuss matters on the attached agenda.
Justin Jones, Chair
Muni
cipal Services Committee
I HEREBY CERTIFY that this agenda in its entirety, was posted on the Internet at https://www.cityofpasadena.net/commissions/city-council-municipal-services-committee/ and on the Council Chamber Bulletin Board, Room S249, and the Bulletin Board in the rotunda area; City Hall, 100 North Garfield Avenue, this October 23, 2025, by 6:30 p.m. and that copies hereof were faxed, emailed or delivered to each member of the City Council and to each local newspaper of general circulation, radio or television station requesting notice in writing, all of which recipients are identified on the distribution herein below.
Zulma Ross
DISTRIBUTION:
MSC Committee Members Central Library General Manager Pasadena Weekly City Council City Clerk Director of Planning and Permitting Pasadena Star-News City Manager Director of Public Works Los Angeles Times Pasadena Now City Attorney Public Information Officer La Opinion Pasadena Journal In compliance with the Americans with Disabilities Act of 1990, listening assistive devices are available from the City Clerk's Office with a 24-hour advance notice.
Please call (626) 744-4124 to request use of a listening device. Language translation services may be requested with 24-hour advance notice.
Habra servicio de interpretacion disponible para estas juntas llamando al (626) 744-4124 por lo menos con 24 horas de anticipación.
REGULAR MEETING AGENDA
MUNICIPAL SERVICES COMMITTEE
OCTOBER 28, 2025
Public Meeting: 4:00 P.M.
Council Chamber, Pasadena
City Hall 100 North Garfield Avenue, Room S249
The Municipal Services Committee may take action within its authority on any item listed on this agenda as it deems appropriate following consideration and discussion of the matter.
APPROVAL OF MINUTES
1. ADOPTION OF THE REVISED ENERGY AND CREDIT RISK MANAGEMENT POLICY
Recommendation to approve changes to PWP’s Energy Credit and Risk Management Policy regarding market exposure, liquidity, and credit risk when participating in energy transactions.
2. MASTER STREET TREE PLAN
Recommendation to approve amendments to Master Street Tree Plan.
INFORMATIONAL ONLY
Information only items contain no staff recommendations. The committee may, however, take action within its authority relating to informational items on the agenda as it deems appropriate following consideration and discussion of the matter.
3. PREPAID RENEWABLE ENERGY TRANSACTION FOR COST SAVINGS Information regarding potential prepaid energy transactions through the sale of clean energy
bonds to generate long-term savings on power
supply costs.
4. PUBLIC HEALTH GOALS
2025 Public Health Goals report on water quality in compliance with State standards.
PUBLIC MEETING - 4:00 P.M.
ROLL CALL
PUBLIC COMMENT
ADJOURN
NEW BUSINESS
1 ITEM #1
2 3
4 5
6 7
PASADENA WATER AND POWER
ENERGY AND CREDIT RISK
MANAGEMENT POLICY
January 2018October 2025
8 Pasadena Water and Power
Energy and Credit Risk Management Policy
TABLE OF CONTENTS
1.0 INTRODUCTION .................................................................................................................3
2.0 PURPOSE and SCOPE .........................................................................................................3
2.1 Purpose ..............................................................................................................................3
2.2 Scope .................................................................................................................................3
2.3 Effective Date ....................................................................................................................4
3.0 POLICY OBJECTIVES ........................................................................................................4
4.0 TRANSACTION POLICY AND LIMITS ............................................................................4
4.1 Anti-Speculation ................................................................................................................5
4.2 Counterparty Limitations ...................................................................................................5
4.3 Transaction Types ..............................................................................................................6
4.4 Transaction Authorizations and Limits ..............................................................................7
4.4.1 Maximum Transaction Term ......................................................................................8
4.5 Trade Execution and Authorized Personnel .......................................................................8
5.0 RISK GOVERNANCE STRUCTURE AND RESPONSIBILITIES ....................................8
5.1 City Council .......................................................................................................................8
5.2 Municipal Services Committee ..........................................................................................9
5.3 General Manager ...............................................................................................................9
5.4 Energy and Credit Risk Management Committee ..............................................................9
5.5 Management Oversight/Separation of Duties ..................................................................10
5.5.1 Front Office ..............................................................................................................11
5.5.2 Middle Office ...........................................................................................................11
5.5.3 Back Office ..............................................................................................................12
6.0 POLICY MONITORING AND COMPLIANCE ................................................................12
6.1 Monitoring and Reporting ...............................................................................................12
6.2 Compliance Exceptions ...................................................................................................13
6.3 Reporting of Exceptions ..................................................................................................13
6.4 Assessment ......................................................................................................................13
7.0 CONFLICT OF INTEREST ...............................................................................................13
APPENDICES
Appendix A – Transaction Type Authority: City Council Resolutions Appendix B – Acknowledgement and Employee Compliance Form Appendix C – Glossary of Energy and Credit Risk Management Terms 9 Pasadena Water and Power
Energy and Credit Risk Management Policy
1.0 INTRODUCTION
It is the goal mission of the Pasadena Water and Power Department (“PWP”) to provide superior customer service, reliable electricity and quality water at reasonable, competitive and stable rates to its customers in an environmentally sustainable mannersafe and reliable water and power with superior customer service at competitive rates.
PWP’s electric utility core business is to meet the load requirements of its residential, commercial and industrial and institutional customers and deliver reliable electric service in a safe and environmentally sustainable manner while optimizing the value of its assets. PWP recognizes that certain risks are inherent in the energy business environment.
PWP’s energy and credit risk management philosophy is that no activities related to energy purchase and sales should expose the City to the possibility of large financial losses in relation to the size of the energy reserve fundsEnergy Cost Adjustment Fund, which is currently about two months of energy cost.
2.0 PURPOSE and SCOPE
2.1 Purpose
The Energy and Credit Risk Management Policy (“Policy”) details the key control structures and policies utilized to manage risks associated with PWP’s power supply portfolio.
It establishes a defined level of trading authority granted by the City Council to the City Manager and the PWP General Manager as well as prudent risk management processes based on sound utility risk management principles, while ensuring adherence to financial requirements set forth by the City Council as well as all pertinent legal requirements. The controls, structures and policies are focused on the following issues:
Clearly defined segregation of duties and delegation of authority Organizational structure for risk management controls Policies relating to setting acceptable risk parameters and risk limits Policies for risk reporting
Permitted transaction and product types
Defined level of trading authority granted by City Council to the City Manager and the PWP General Manager
2.2 Scope
The Policy applies only to activities related to PWP’s power supply portfolio. It prescribes the management, organization, authority, processes, tools, and systems to monitor, measure, and control market and credit risks to which PWP is exposed in its normal course of business, including wholesale and retail operations, capital projects, and participation in the California Indepen
dent System Operator (CAISO) market.
The Policy does not cover electric distribution, information systems, customer services, 10 Pasadena Water and Power
Energy and Credit Risk Management Policy
or any aspect of the water system. It does notNeither does it address the mitigation of risk of catastrophic failure, environmental, or regulatory exposures. Neither nor does it address general business risks such as fire, accident, and general liability. It is intended solely for mitigation of energy-power supply riskrelated risk.
11 Pasadena Water and Power
Energy and Credit Risk Management Policy
2.3 Effective Date
The Policy is effective immediately upon its adoption by the City Council and replaces the 19992018 Policy adopted by the City Council.
3.0 POLICY OBJECTIVES
The objective of the Policy is to limit financial risks associated with procuring and optimizing the power supply portfolio used to meet PWP’s retail electric demands in order to provide rate stability to its retail customers and a stable financial returncontribution to the City’s General Fund. The basic premise underlying PWP’s energy and credit risk management philosophy is that no activities related to energy purchase and sales should expose the City and PWP to the possibility of large financial losses in relation to the size of the energy reserve funds, which is currently about two months of energy cost.
The key objectives of this Policy are to:
1. Provide stable retail electric rates to retail customers by managing energy cost and credit risks that are inherent in optimizing the power supply portfolio used to meet forecasted customer loads. This is accomplished by limiting forecast exposure to unexpected costs to within acceptable limits.
2. Provide competitive rates by optimizing the power supply portfolio and ensuring that the best available price is obtained while complying with the requirements of this Policy and City codes, regulations, and policies.
2.3. Establishing, measuring and managing authorizations and trading limitstransactional authority limits associat ed with optimizing PWP’s portfolio of energy, fuel and related products to ensure adequate mitigation of risks associated with necessary participation in market transactions.
4.0 TRANSACTION POLICY AND LIMITS
All executed transactions shall conform to the Policy as described in this document, as well as in the risk management program procedures, guidelines and controls manuals as developed and adopted by PWP’s Energy and Credit Risk Management Committee (“RMC”), which is further defined in Section 5.4 below.
Authority to execute transactions shall be subject to City Council approved enabling agreements and contracts or contractual forms approved by the City Councils. In all cases the Pasadena Municipal Code provides the final authorization rules and regulations for energy purchases.
Failure to observe the Transaction Policy and Limits when executing transactions is a violation 12 Pasadena Water and Power
Energy and Credit Risk Management Policy
of the Policy and is subject to disciplinary action. The key requirements and limitations for transactions are as follows:
13 Pasadena Water and Power
Energy and Credit Risk Management Policy
4.1 Anti-Speculation
Speculative buying and or and/or selling of energy products is prohibited. In no event shall transactions be entered into to speculate on market conditions. Speculation is definesdd as any of the following transaction types:
Buying energy products that are not needed for meeting forecasted retail load or wholesale obligations; and,
Selling energy products that are not owned and excess to forecasted retail load.
The simultaneous purchase of an energy product and sale of a corresponding energy product shall be permitted provided that the net value (proceeds) from the transaction is derived from the utilization of owned and excess transmission or generation capacity.
Credit or co
ntract sleeving transactions are strictly prohibited. Credit sleeving is an arrangement where a more financially reputable entity acts as an middleman intermediary for a smaller undercapitalized entity in the execution of a transaction. Contract sleeving is an arrangement where an entity acts as an middleman intermediary between two entities to bridge a contract gap that exists between the two entities. PWP may not act as the intermediary in either a credit or contract sleeve. Howev er, PWP may unintentionally participate in a sleeving transaction provided th at the intermediary sleeving th e transaction is an approved counterparty in accordance with the Counterparty Credit Evaluation and Procedures Manual and the transaction is otherwise in compliance with delegated authority.
4.2 Counterparty Limitations
Under normal operating conditions, all Ttransactions must be with counterparties approved by the Energy Risk Manager in accordance with the Counterparty Credit Evaluation and Procedures Manual approved, creditworthy counterparties with available credit. Any transactions with counterparties that do not have approved and/or executed enabling agreements in place with PWP must be contingent upon the approval of a stand alone contract or long form confirmation governing the terms of such applicable transactions.enabling agreements for such transaction.
Regardless of potential credit concerns with the CAISO, PWP may continue to transact with the CAISO to the extent necessary to meet retail loads, wholesale obligations, utilize existing resources, and/or as required by the CAISO Tariff or any statutory or regulatory requirement.
During a system emergency or a market emergency , a limited number of short-term transactions with non- approved counterparties may be required, and may require exceeding established credit limits, in order to meet retail loads and/or maintain power system stability.
A system emergency is defined as a natural disaster, weather-related incident, major equipment failure, gas supply curtailment or operational flow order requiring immediate response, or CAISO failure to deliver power for any reason that affects PWP’s ability to provide power to retail load or meet obligations. A market emergency is defined as a notification of a declared 14 Pasadena Water and Power
Energy and Credit Risk Management Policy
emergency from the CAISO or an Operational Fl ow Order from a Pipeline Operator such as SoOCalAL Gas and supply cannot be obtained from PWP’s current list of approved counterparties. If an emergency situation occurs, Under such conditions, if the PWP General Manager declares an emergency, the PWP General Manager shall have the authority to obtain resources on a short- term basis (up to 30 days) from non-approved counterparties and/or to exceed established credit limits. In addition, the General Manager shall notify the City Manager within 48 hours of declaring an emergency. .As soon as is practically possible or at the next regularly meeting of scheduled or special meeting of the Municipal Services Committee (“MSC”) and the City Council, the PWP General Manager shall seek approval for file a full report of the circumstances of any such emergency transactions, or such additional transactions as may be necessary to provide resources on a continuing basis to retail customers from the MSC and the City Council.
Specific details for counterparty credit risk management shall be prescribed in the Counterparty Credit Evaluation and Procedures Manual as developed by the RMC and revised from time to time.
15 Pasadena Water and Power
Energy and Credit Risk Management Policy
4.3 Transaction Types
All transactions must be Approved Transaction Types, as authorized by the City Council and thethis Policy.
The City
Council must provide authorization for all transactions via approval of the Policy. In general, the City Council authorizes the City Manager and/or PWP General Manager to enter into contracts for various types of energy-related products (e.g.., energy, capacity, transmission, natural gas, environmental and emission credits, etc.) by way of adopting an “Authorizing Resolution”. Appendix A, which shall be updated and maintained by the RMC , summarizes applicable Authorizing Resolutions adopted by the City Council. PWP is required to conduct a comprehensive review of the Authorizing Resolutions at least once every three years and make recommendations to update the Authorizing Resolutions as necessary.
This The Policy may further limit the use of the Authorizing Resolutions, but cannot expand upon the transaction authority granted by the City Council. For specific transactions that are not covered by an Authorizing Resolution or exceed the scope of this Policy, the City Council may also provide authorization for the contract or transaction by motion pursuant to a staff recommendation.
In addition to trading the various energy related products in their “physical” fo rm, these products may also be traded as financial or derivative products to the extent authorized by City Council resolution., up to the authorization limits of the General Manager.. Such transactions are would be used to only manage (hedge) financial risks associated with PWP’s open positions (retail load or wholesale sales commitments) by set price caps and floors.
Examples include:
Over-the-C ounter Financial Swaps (fixed/index) for Natural gas and/or Power Financial Commodity Swaps for Natural Gas and/or Powers Financial Commodity Options and Swaptions
Natural Gas or Electric Exchange-Traded Products (Futures and Options) Natural Ggas or Electric Options
Emission Allowances
Renewable Energy Credits
Carbon Products
Unit ContingencyCapacity Products
Firm and Non-Firm Transmission
Any financially-settled schedules or transactions with the CAISO of otherwise approved physical transaction types (e.g., energy or transmission products including, but not limited to CAISO Auctioned Congestion Revenue Rights) are expressly permitted by this Policy.
The RMC, with the approval of PWP General Manager, will have the responsibility to maintain a list 16 Pasadena Water and Power
Energy and Credit Risk Management Policy
of Approved Transaction Types consistent with City Council authorization. 17 Pasadena Water and Power
Energy and Credit Risk Management Policy
4.4 Transaction Authorizations and Limits
The authorized transactions and limits for authorized personnel are shown below.
Transaction Authorizations and Limits
Real Time
Schedulers
Pre- Schedulers
Energy
Trading
Manager
Assistant
General
Manager of -
Power
SupplyPSBU
General
Manager
General
Manager
with City
Managers
’s
Approval
Type
Purchases
to meet
load,
covered
sales
Purchases to
meet load,
covered sales
Purchases to
meet load,
covered sales,
hedges
Purchases to
meet load,
covered sales,
hedges
Purchases
to meet
load,
covered
sales,
hedges
Purchases to meet
load, covered sales,
hedges
Term
< 1 Day < 1 Week < 1 Month < 3 6 Months < 1 Year
> 1 year < 3
Years
Lead
Time
< 1 Day
Hourly to
balance of day
< 1 Week
Day ahead to balance
of week
< 1 Month
Week ahead to
month ahead
< 3 6 Months
Month ahead to
two
quartersquarter
six months ahead
< 1 Year
Up to 1
year.
< 1.521.5 Years
Up to 1.52 1.5 years
Same-day
transactions
or day-
ahead
activities
performed
on
weekends
and
holidays
Transaction can be
executed within
one- week period
prior to the
transaction
effective date or
initial delivery
date
Transaction can
be executed
within one-
month period
prior to the
transaction
effective date or
initial delivery
date
Transaction can be
executed within
the three
six-
month period
prior to the
transaction
effective date or
initial
delivery date
Transaction
can be
executed
within the
twelve-
month
period prior
to the
transaction
effective date
or initial
delivery date
Transaction can be
executed within the
eighteen-month
period prior to the
transaction
effective date or
initial delivery date
Total
Volume
Up to 100% of
estimated
requirement
or available
Up to 100% of
estimated
requirement or
available
Up to 100% of
estimated
requirement or
available
Up to 115% of
estimated
requirement or
available
Up to 115% of
estimated
requirement
or available
Up to 115% of
estimated
requirement or
available
available available available available available available 18 Pasadena Water and Power
Energy and Credit Risk Management Policy
Counter
-party
Credit
From pre-
a
pproved
counterparty
credit list
From pre-
a
pproved
cCounterparty
credit list
From pre-
a
pproved
counterparty
credit list
From pre-
a
pproved
cCounterparty
credit list
From pre-
a
pproved
counterparty
credit list or
with credit
facility
From pre-app
roved
counterparty credit
list or with credit
facility
credit list credit list credit list credit list with credit facility
19 Pasadena Water and Power
Energy and Credit Risk Management Policy
* Note: Energy sales and purchases are limited to sales from capacity and purchases to meet load requirements (or to replace higher cost resources or limited energy/hydro).
4.4.1 Maximum Transaction Term
The maximum term of any transaction term for purchases and sales of energy and related products is limited to three years unless otherwise approved by the City Council.
Transactions with a term up to three years can be executed within the eighteen-monthtwo 2 year period prior to the transaction effective date or initial delivery date with the approval/concurrence of the City Manager. The RMC, with the approval of PWP General Manager, will have the responsibility to establish transaction term authority limits of up to six months for various personnel involved in the Front Office functions.
4.5 Trade Execution and Authorized Personnel
All transactions must be committed confirmed over recorded phone lines or via electronic media (e.g. counterparty/exchange software application).
Only authorized PWP staff in the Energy Trading Group within the Power Supply Business Unit may conduct energy purchase and sale transactions. The RMC, with the approval of PWP General Manager, will have the responsibility to delegate specific transaction authority to designated Energy Trading Group personnel, not to exceed the limits of t he PWP General Manager as delegated in the Policy. Such authorizations are maintained in the Energy Trading, Risk and Settlements Procedures and Controls Manual as developed, and adopted and updated from time-to-time by the RMC. Authorized personnel in the Energy Risk and Credit Group of PWP’s Finance, and Administration and Customer Service Business Unit shall be responsible for informing counterparties of such approved authorizations, including transacting authority and restrictions, along with product types and/or term and dollar limits.
All personnel Specific details for counterparty credit risk management shall be prescribed in the Counterparty Credit Evaluation and Procedures Manual as developed by the RMC and revised from time to time.
with designated responsibility for energy risk and credit control functions and settlement and processing functions are strictly prohibited from executing transactions.
5.0 RISK GOVERNANCE STRUCTURE AND RESPONSIBILITIES
This section defines the overall roles and responsibilities for implementation of this Policy. Specific details of the roles and responsibilities of the oversight and operational divisions within the energy and credit risk management program at PWP are outlined in the 20 Pasadena Water and Power
Energy and Credit Risk Management Policy
Energy Trading, Risk, and Settlements Procedures and Controls Manual as developed by the RMC and revised from time to time.
5.1 City Council
The City Council is responsible for adopting high-level broad policiesy and providing strategic direction as contained in this Policy document. The City Council adopts the Policy based upon its review of the recommendations made by the RMC, as reviewed by the MSC, 21 Pasadena Water and Power
Energy and Credit Risk Management Policy
and directselegates the General Manager of PWP to execute the Policyit. The City Council will review the Policy every two yearsannually and approve newthe enabling agreements under which wholesale energy agreements can be made.
5.2 Municipal Services Committee
The City Council Municipal Services Committee (“MSC”) provides direction to PWP on long- term planning and policy matters relating to utility operations. The Municipal Services Committee (“MSC”) will receive and review semi-annual management energy and credit risk reports prepared by the RMC, a s n e e d e d o r u p o n r e q u e s t , and make recommendations consistent with the Policy to the City Council.
5.3 General Manager
The General Manager reports to the City Manager and has overall responsibility for executing and ensuring compliance with the Policy adopted by the City Council. The General Manager provides regular updates to the City Manager on the energy portfolio risk management activities. In addition, the General Manager provides semi-annual reports as needed or upon request to the Municipal Services CommitteeMSC on the energy portfolio risk management activities and annual reports to the City Council on the adequacy of the Policy, including any necessary changes to the Policy.
5.4 Energy and Credit Risk Management Committee
The Energy and Credit Risk Management Committee (“RMC”) is responsible for overseeing compliance with the Policy, and reviewing and recommending changes to the Policy as necessary. The RMC is also responsible for authorizing all products and commodity types as further detailed in the Energy Trading, Risk and Settlements Procedures and Controls Manual as developed and adopted by the RMC. In addition, the RMC is responsible for
creating and implementing a sound approach to managing risk consistent with the business strategy and risk tolerance of the organization as defined by the City Council. As such, the RMC is critical to overseeing and reviewing the risk management process and infrastructure and managing PWP’s risk exposure.
The RMC will consist of the following City staff:
PWP General Manager (RMC Chairperson);
PWP Assistant General Manager and Chief Deputy;
PWP Assistant General Manager – Power Supply;
PWP Assistant General Manager – Finance ,and Administration and Customer Service;
Wholesale Operations Manager / Energy Trading Manager; Wholesale Operations Manager / Energy Settlements Manager; Power Resources Planning Manager; and,
22 Pasadena Water and Power
Energy and Credit Risk Management Policy
Wholesale Operations Manager / Energy Risk and Credit Manager (RMC Secretary).
The Assistant City Manager (or designee), The City Finance Director of Finance (or designee), the Internal Audit Manager (or designee), and the Assistant City Attorney (or designee) will act as advisors to the RMC.
The RMC shall meet regularly, but at a minimum monthly, to discuss risk management, operating processes, trading controls and authorizations. The RMC meetings can be conducted in person or virtually ,, through telephone conference calls, and/or using electronic media. A quorum of at least 45 of committee voting members must be present.
5.5 Management Oversight/Separation of Duties
Risk management oversight at an operational level is accomplished through supervisory review and approval with appropriate separation of duties. PWP’s risk management functions shall be segregated into Front Office, Middle Office and Back Office as outlined below to maintain effective system of controls over financial and operational risks.
Front Office
(Transactions)
Middle Office
(Control)
Back Office
(Processing)
Power Supply Business
Unit
PWP Finance, and
Administration and
Customer Service
Business Unit
PWP Finance and,
Administration and
Customer Service
Business Unit and the
City Finance Department
Energy Trading Manager Energy Risk and Credit
Manager
Energy Settlements
Manager
Demand forecast and
portfolio position
Portfolio optimization
and hedging strategy
adhering to Hedge
Policy
Marketing contact
Customer contact
Transaction structure
Pricing/negotiation
Transaction execution,
booking, scheduling,
and nominations
Master Agreement /
Contract Negotiations
Independent control
Risk identification
Risk measurement
Risk monitoring
Mark-to-market
Risk limits
Risk metrics
Hedge Policy
compliance
monitoring
Credit emergency
shutdown
Management reporting
Counter-party credit
authorization
Master
Agreement/
Confirmations
Reconciliations
Energy Accounting
Shadow, Initial,
Final, True-up, and
CAISO Settlement
Contract management
and compliance
Approve invoices
(accounts payable)
Issue invoices
Manage Escrow
Accounts
23 Pasadena Water and Power
Energy and Credit Risk Management Policy
Contract Review
The Middle and Back Offices sha
ll be independent from the Front Office functions, and
shall provide oversight of the risks assumed by the Front Office in the course of transacting for either renewable and non-renewable energy and energy related products and services. 24 Pasadena Water and Power
Energy and Credit Risk Management Policy
Some of the front, middle, and back office functions may be contracted to a third party vendor. PWP has currently engaged Allianc e for Cooperative Energy Services Power Marketing LLC ("ACES") to perform its real-time trading activities, along with limited Middle and Back Office functions. Additional support functions such as Legal, Treasury/Finance/Audit, and Information Tec hnology will be drawn upon as needed to support the segregated structure.
5.5.1 Front Office
The Front Office is primarily responsible for resource planning and procuring resources to meet the physical, financial and contractual requirements of PWP’s energy and fuel portfolio. The Front Office shall maintain an integrated and balanced portfolio of resources to cover retail forecasted load requirements, and shall establish minimum coverage requirements for capacity and energy.
The Front Office is responsible forto ensuringe that the procedures and processes needed to transact business within the Policy are in place and shall perform all duties related to actual transacting in the wholesale natural gas and energy markets. PWP Assistant General Manager – Power Supply is responsible for managing the Front Office. The Front Office is the primary interface with potential wholesale transacting counterparties. Detailed responsibilities of the Front Office are outlined in the Energy Trading, Risk and Settlements Procedur es and
Controls Manual.
5.5.2 Middle Office
The Middle Office is primarily responsible for providing risk oversight and controls.
The Middle Office will monitor, verify and report on the compliance with the Policy and risk management program, review all risk management activities, determine portfolio and credit exposure, transaction compliance and on-going approval of counterparties. The Middle Office will be responsible for reporting to the RMC on risk manageme nt issues, and recommending to the RMC when changes in policy or operating procedures are required. These recommendations may relate to the temporary or permanent halting of transactions with one or more counterparties, exceptions to rules and procedures, other operational exceptions, and any other topic th
e Middle Office believes represents an unacceptable risk exposure. The Energy Risk and Credit Manager will be responsible for managing the middle-office functions and will report to PWP Assistant General Manager – Finance and, Administration and Customer Service.
The Middle Office adopts enforces and updates as necessary the Policy and develops and updates related procedures and controls manuals so that portfolio management functions occur in compliance with the City Council-adopted Policy and RMC adopted procedures, guidelines and controls. The functions of the Middle Office can be broadly defined as Quantitative Analysis, Compliance Review, Credit Administration, and Management Reporting.
25 Pasadena Water and Power
Energy and Credit Risk Management Policy
Quantitative Analysis
The Middle Office performs necessaryrigorous risk analysis to evaluate the risk exposure on a transactional and portfolio basis.
Compliance Review
The Middle Office monitors all transactions to ensure compliance of transactions with the RMC Policy procedures, guidelines and controls.
Credit Administration
The Middle Office monitors counterparty creditworthiness. The Middle Office objectively measures and monitors credit limits and credit histories, and without approval of the RMC, may temporarily halt trading or, with the approval of the RMC, permanently halt trading upon approval by the RMC with the concurrence of the RMC, with an approved counterparty because of credit exposure or credit condition. Upon approval by the RMC to permanently suspend trading,In the event of any trading suspensions, the Middle Office will communicate with Front Office in writing or via email the term of suspension.
Management Reporting
The Middle Office administers reports to the RMC related to risk management, and performance in alignment with the Policy and related procedures, guidelines and controls and the requests of the RMC.
5.5.3 Back Office
The Back Office is primarily responsible for energy accounting and settlements, settlement and payment of bills, recording and reconciling transactions, contract management and compliance. The Back Office is also responsible for accurate transactions records and settlements, independently monitoring and recording transactions into a tracking database, and verifying and reporting on compliance with procedures as reflected in deal tracking documentation. The Back Office functions are detailed in the Energy Trading, Risk and Settlements Procedures and Controls Manual. The Back Office is managed by the Wholesale Operations Manager/Energy Settlements Manager who reports to PWP Assistant General Manager – Finance and, Administration an
d Customer Service.
6.0 POLICY MONITORING AND COMPLIANCE
6.1 Monitoring and Reporting
PWP shall prepare risk management reports containing an analysis of physical and financial positions of all energy resources in its energy portfolio and any potential risks associated with its energy portfolio. Such reports shall be prepared by the Middle and Back Office staff, and reviewed by the RMC. The frequency and content of the risk manage ment reports for each oversight body shall be prescribed in the Energy Trading, Risk and Settlements Procedures and Controls Manual.
26 Pasadena Water and Power
Energy and Credit Risk Management Policy
6.2 Compliance Exceptions
Compliance exceptions are actions which violate the authority limits or directives set forth herein or in the risk management program procedures and controls manuals as developed and adopted by the RMC.
6.3 Reporting of Exceptions
Exceptions to mandated policies, procedures and regulations shall be reported to the RMC within 48 hours after they are identified as provided in the risk management program procedures and controls manuals as developed and adopted by the RMC.
6.4 Assessment
Compliance with the Policy and with the specific procedures, guidelines and controls as developed and adopted by the RMC shall be subject to a review every three years review by an independent consulting firm that the RMC, with concurrence of the Director of City Finance Director, may appoint to evaluate the effectiveness of mandated controls. The hired firm will also verify that stated objectives are being carried out, and that internal controls are in place for processes to comply with the Policy. The firm will also identify any recent changes in industry best practices that may warrant program revisions. Upon completion of the assessment, the report shall be provided to the RMC, City Mana ger and Director ofCity Finance Director. The RMC will review any recommended changes or enhancements to the Energy and Credit Risk Management program and update the risk management procedures and controls manuals as required. The RMC will also recommend updates to the Policy and make a recommendation to the City Council on the adequacy of the Policy and necessary changes.
7.0 CONFLICT OF INTEREST
In accordance with the Pasadena Municipal Code and California law, personnel involved in transacting and oversight of PWP’s supply resource acquisition programs may not engage in financial conflict of interest, unless the City is duly informed and it elects to waive such conflicts. All such personnel are: (1) strict ly forbidden from directly investing in any business entity that could potentially enter into energy transactions with PWP; and, (2) required to complete, on an annual basis, th e Employee Qualifications and Code of Conduct and Form 700 Disclosures forms and submit these forms to the City Clerk; and, (3) required to provide written acknowledgement of compliance with this Policy by completing the Energy Risk Management Policy Acknowledgement and Employee Compliance Form at least once each year after Risk Policy training is provided by the Energy Risk and Credit Manager.
The PWP Energy Risk and Credit Manager is responsible for routinely reviewing the Form 700 of each personnel engaged in the su pply resource decision-making process for the purpose of identifying potential financial conflicts of interest. The City Attorney’s Office will assist the
27 Pasadena Water and Power
Energy and Credit Risk Management Policy
PWP Energy Risk and Credit Manager in reviewing these forms and providing legal advice in connection with such reviews.
The Energy Trading, Risk and Settlemen ts Procedures and Controls Manual , which is developed and adopted by the RMC, contains additional detailed requirements for personnel conflict of interest disclosure and prohibitions as to acquiring or maintainingmaintain financial interest in energy trading counterparties.
28 Pasadena Water and Power
Energy and Credit Risk Management Policy
Appendix A
Transaction Type Authority: City Council Resolutions
This table summarizes the City Council resolutions authorizing various transaction types to be carried out by PWP . A list of Authorized Transaction Types shall be updated and maintained by the RMC, consistent with the Energy and Credit Risk Management Policy and approved City Council Resolutions.
Resolution
(Dated)
To Contract for Energy Products1
7452
(12-16-1996)
Air emissions credits (NOx and SOx)
4184-2
(10-22-2007)
Physical Electrical energy
Physical Electrical capacity
The transmission of electrical energy or capacity or both Electric generation an d transmission capacity for
planning purposes (e.g., RA)
75492
(10-20-1997)
Contracts for products <$25,000 may be authorized by
the General Manager
Products <$75,000 may be authorized by the City
Manager
8243
(5-12-2003)
Physical Natural gas commodity
Physical Petroleum products
Gas transaction master enabling agreements (e.g.,
NAESB, bilateral)
7452
(12-16-1996)
Air emissio ns credits (NOx and SOx)
4184-2
(10-22-2007)8243
(5-12-2003)
Physical Electrical energy
Physical Electrical capacity
The transmission of electrical energy or capacity or both Electric generation an d transmission capacity for
planning purposes (e.g., RA)Physical Natural gas
commodity
Physical Petroleum products
Gas transaction master enabling agreements (e.g.,
NAESB, bilateral)
8965
(8-3-2009)
Congestion revenue rights (CRR’s) for use in CAISO
operated transmission markets
29 Pasadena Water and Power
Energy and Credit Risk Management Policy
9063
(10-4-2010)
Environmental attributes such as RECs, green tags,
carbon credits, and any other environmental attributes
as may be defined in the future
Carbon-related permits, credits, allowances, certificates, offsets and similar instruments
9216
(7-9-2012)
Designates the General Manager as the City’s
“Authorized Account Representative” and the Assistant
General Manager as “Alternative Authorized Account
Representative” to conduct transactions related to the
California Cap and Trade
9221
(7-30-2012)
Authorizes The City Manager or General Manger of
Water and Power Department to execute and
implement agreements with CAISO
9959
(11-14-2022)
Designates formally Water and Power Department
authorities as Authorized/Designated Representatives
to execute transactions or submit reporting in regulated compliance programs
Supersedes Resolution 9216 (7-9-2012) designed
specifically for Cap and Trade
75492
(10-20-1997)
Contracts for products <$25,000 may be authorized by
the General Manager
Products <$75,000 may be authorized by the City
Manager
30 Pasadena Water and Power
Energy and Credit Risk Management Policy
Appendix A (Continued)
* Notes: 1. Council resolutions authorize the General Manager to enter into agreements for the purchase, sale, exchange, storage, transportation, transfer, and/or participation in auctions, as may be applicable for the authorized energy products.
2. The use of Resolution 7549 excludes restricts the use of financial derivatives. 31 Pasadena Water and Power
Energy and Credit Risk Management Policy
Appendix B
Acknowledgement and Employee Compliance Form
The purpose of this form is for the individual PWP employee involved with energy risk and credit management activities, including but not limited to, Front Office, Middle Office or Back Office activities associated with transactions, energy trading, risk management and other related activities to acknowledge in writing that they have received, read and understood the Energy and Credit Risk Management Policy (Policy) and
related procedural documents. And
for the employee to acknowledge the confidential and proprietary nature of the information used in energy risk management activities, and agree to maintain such information as confidential.
The employee recognizes that violating the Policy and related policies and procedural documents can lead to disciplinary actions or constitute grounds for progressive disciplinary action, which may include termination of employment.
The undersigned hereby certifies that he/she has received, read and understood the Policy and related procedural documents.
Employee Name
Title
Department
Manager/S
upervisor
Control
Office ( ) Front Office
( ) Middle Office
( ) Back Office
( ) Other
Signature Date
32 Pasadena Water and Power
Energy and Credit Risk Management Policy
Appendi
x C
Glossary of Energy and Credit Risk Management Terms
The following are definitions of terms used in energy and credit risk management:
Authorized Counterparty List: A list that indicates the approved counterparties and their specific credit limit and current credit rating.
California Independent System Operator (CAISO): A state chartered, California non-profit public benefit corporation that is responsible for ensuring the efficient use and reliable operation of the electric transmission grid (system) in the state of California.
Collateral: An obligation or security
linked to another obligation or security to secure its
performance.
Congestion: Physical constraints at certain points on electricity transmission networks.
Congestion Revenue Rights (CRRs): CRRs are financial instruments made available through the CAISO’s allocation process where a certain amount of CRRs are provided at no cost to loa d
serving entities (such as PWP), the CAISO’s auction process and a secondary market that enable CRR holders to manage the variability in congestion cost based on Locational Marginal Pricing.
Counterparty: A participant in a physical or financial co ntract.
Counterparty Risk: This is the risk that a counterparty to a transaction or contract will default or fail to perform) on its obligation under the contract.
Credit Limit: Pre-established dollar valued trade limit set for each counterparty based upon their financial strength, trading and payment history.
Day-Ahead Market: The market trading for the day befo
re the operating day.
Derivative: Any financial instrument, such as a futures contract, Swap or Option, which derives its value from the value of an underlying security or physical commodity.
Energy Portfolio: The collective term for PWP’s generation assets, short and long term power supply contracts for natural gas and power, transmission assets, transactions or trades, and retail load obligation.
33 Pasadena Water and Power
Energy and Credit Risk Management Policy
Energy Portfolio Open Position – The amount or percent of the load obligation that is not covered by available resources (power and/or natural gas). A negative or short portfolio position implies that available resources are less than the load obligation and a positive or long portfolio position implies that available resources exc eed load obligation.
Energy Risk Management: The identification and management of PWP’s energy portfolio risks to support achievement of its business objectives.
Estimated Available: The estimated available for a given period is equal to excess resources above the forecasted load and/or compliance/reliability obligation.
Estimated Requirement: The estimated requirement for a given period is the forecaste d load and/or compliance/reliability obligation less available resources.
Federal Energy Regulatory Commission (FERC): The U.S. government body that regulates interstate energy markets.
Hedge: A transaction that reduces price risk relative to a position that an organization has or intends to take in the physical or financial market.
Hedging: This is the use of energy-related transactions to limit or reduce the likelihoo d of financial loss due to fluctuations in market conditions. For example, buying or selling physical or financial energy-related products to offset short or long inventory positions.
Liquid Market: A market in which buying and selling can be performed with ease, due to the presence of a large number of buyers and sellers prepared to trade substantial quantities at small price differences. (The opposite is an illiquid market.) Locational Marginal Pricing (LM
P): A method of pricing the cost of congestion into electricity prices.
Long: A position in which an asset or right is owned or a posi tion that appreciates in value if the value of the underlying instrument or market price increases.
Market (Price) Risk: Risk due to changes in the market prices of energy commodities which can have an adverse impact on energy cost
Marking-to-Market (MTM): The process of valuing a position or portfolio against a market cl
earing-price.
North American Energy Standards Board (NAESB): NAESB serves as an industry forum for the development and promotion of standards which will lead to a seamless marketplace for 34 Pasadena Water and Power
Energy and Credit Risk Management Policy
wholesale and retail natural gas and electricity, as recognized by its customers, business community, participants, and regulatory entities.
North American Electric Reliability Corporation (NERC): A not-for-profit entity whose mission is to ensure the reliability of the bulk power system in North America.
Netting Agreement – A contingency agreement in which debit and credit positions are allowed to offset each other in the event of either counterparty defaulting.
Operational and Organizational Risk: The risk that deficiencies in internal control or information systems or failure to effectively execute business activities will result in unexpected economic loss.
Physical Hedge – an energy input purchase or retail/wholesale sale transacted to meet physical requirements.
Real-Time – To schedule for delivery of physical power on an hourly basis.
Regulatory and Legal Risks: The risk that contracts are not legally enforceable or documented
correctly or that regulatory agencies or courts may take actions or adopt measures which may potentially impact the portfolio value
Risk: Refers to uncertainty about future cash flows and asset values, and it consist of an event that could potentially cause actu
al outcomes to differ from expected outcomes, either
negatively or positively
Short: A position in which an asset or right is not owned or a position that increases in value if the value of the underlying instrument or market price decreases.
Sleeving: A transaction whereby two counterparties which do not have credit with each other, ask a third party that has
credit with both to be a middleman to facilitate a trade.
Speculative Trading: Taking positions in any commodity price with the expectation that prices will move in a particular direction, including buying power that is not needed with the int ent to resell at a profit or selling power that is needed with the intent to repurchase it at a later date and make a profit.
System Emergency:
(i) A condition that exists when extraordinary events outside normal operating conditions occur that threatens system stability, such as the unplanned loss of a resource; or
(ii) A natural disaster, major equipment failure, gas supply curtailment or operational flow order requiring immediate response; or 35 Pasadena Water and Power
Energy and Credit Risk Management Policy
(iii) CAISO failure to deliver power for any reason that affects PWP’s ability to provide power to retail load or meet obligations.
Transaction: All of the approved Transaction types defined in the Policy, including physical or financial obligations of PWP and one or more counterparties related to energy, capacity, ancillary services, transmission service, natural gas, renewable ener gy credits and greenhouse gasses.
Transaction Activities: The activities involved in the energy supply decision process involving Transactions as defined in the Policy.
Transaction Limits (or Authorized Transaction Limits) – Predefined parameters that restrict transactions. These can include limits on volume, duration, dollar amounts and approval authorities.
Volatility: A measure of the variability of a market factor, most often th e price of the underlying instrument.
Volumetric Risk: The risk that fluctuations in load or resources will adversely affect net revenues
Western Electricity Coordinating Council (WECC): A North American Electric Reliability Council for the Western Interconnection.
Western System Power Pool (WSPP): WSP P is an agreement and an organization that creates power trading opportunities and allows WSPP members to manage power delivery and price risk. The As of January 1 st, 2025, the cCurrent WSPP Agreement with effective date effective May 9, 2013October 21, 2024 , updated June 6, 2013, is the most commonly used standardized power sales contract in the electric industry. It is approved by the FERC and used by jurisdictional and non-jurisdictional entities. Once signed, the Agreement allows instant access to power trading within the membership.
36 PASADENA WATER AND POWER
E
NERGY AND CREDIT RISK
MANAGEMENT POLICY
October 2025
37 TABLE OF CONTENTS
1.0 INTRODUCTION .................................................................................................................3
2.0 PURPOSE and SCOPE .........................................................................................................3
2.1 Purpose ..............................................................................................................................3
2.2 Scope .................................................................................................................................3
2.3 Effective Date ....................................................................................................................4
3.0 POLICY OBJECTIVES ........................................................................................................4
4.0 TRANSACTION POLICY AND LIMITS ............................................................................4
4.1 Anti-Speculation ................................................................................................................5
4.2 Counterparty Limitations ...................................................................................................5
4.3 Transaction Types ..............................................................................................................6
4.4 Transaction Authorizations and Limits ..............................................................................7
4.4.1 Maximum Transaction Term ......................................................................................8
4.5 Trade Execution and Authorized Personnel .......................................................................8
5.0 RISK GOVERNANCE STRUCTURE AND RESPONSIBILITIES ....................................8
5.1 City Council .......................................................................................................................8
5.2 Municipal Services Committee ..........................................................................................9
5.3 General Manager ...............................................................................................................9
5.4 Energy and Credit Risk Management Committee ..............................................................9
5.5 Management Oversight/Separation of Duties ..................................................................10
5.5.1 Front Office ..............................................................................................................11
5.5.2 Middle Office ...........................................................................................................11
5.5.3 Back Office ..............................................................................................................12
6.0 POLICY MONITORING AND COMPLIANCE ................................................................12
6.1 Monitoring and Reporting................................................................................................12
6.2 Compliance Exceptions ...................................................................................................13
6.3 Reporting of Exceptions ..................................................................................................13
6.4 Assessment ......................................................................................................................13
7.0 CONFLICT OF INTEREST................................................................................................13
APPENDICES
Appendix A – Transaction Type Authority: City Council Resolutions Appendix B – Acknowledgement and Employee Compliance Form Appendix C – Glossary of Energy and Credit Risk Management Terms 38 1.0 INTRODUCTION
It is the mission of the Pasadena Water and Power Department (“PWP”) to provide safe and reliable water and power with superior customer service at competitive rates.
PWP’s electric utility core business is to meet the load requirements of its customers and deliver reliable electric service in a safe and environmentally sustainable manner while optimizing the value of its assets. PWP recognizes that certain risks are inherent in the energy business environment.
PWP’s energy and credit risk management philosophy is that no activities related to energy purchase and sales should expose the City to the possibility of large financial losses in relation to the size of the Energy Cost Adjustment Fund.
2.0 PURPOSE and SCOPE
2.1 Purpose
The Energy and Credit Risk Management Policy (“Policy”) details the key control structures and policies utilized to manage risks associated with PWP’s power supply portfolio.
It establishes prudent risk management processes based on sound utility risk management principles, while ensuring adherence to financial requirements set forth by the City Council as well as all pertinent legal requirements. The controls, structures and policies are focused on the following issues:
• Clearly defined segregation of duties and delegation of authority • Organizational structure for risk management controls • Policies relating to setting acceptable risk parameters and risk limits • Policies for risk reporting
• Permitted transaction and product types
• Defined level of trading authority granted by City Council to the City Manager and the PWP General Manager
2.2 Scope
The Policy applies only to activities related to PWP’s power supply portfolio. It prescribes the management, organization, authority, processes, tools, and systems to monitor, measure, and control market and credit risks to which PWP is exposed in its normal course of business, including wholesale and retail operations, capital projects, and participation in the California Independent System Operator (CAISO) market.
The Policy does not cover electric distribution, information systems, customer services, or any aspect of the water system. Neither does it address the mitigation of risk of catastrophic failure, environmental, or regulatory exposures nor does it address general business risks such as fire, accident, and general liability. It is intended solely for mitigation of energy-related risk. 39 2.3 Effective Date
The Policy is effective immediately upon its adoption by the City Council and replaces the 2018 Policy adopted by the City Council.
3.0 POLICY OBJECTIVES
The objective of the Policy is to limit financial risks associated with procuring and optimizing the power supply portfolio used to meet PWP’s retail electric demands in order to provide rate stability to its retail customers.
Th
e key objectives of this Policy are to:
1. Provide stable retail electric rates to retail customers by managing energy cost and credit risks that are inherent in optimizing the power supply portfolio used to meet forecasted customer loads. This is accomplished by limiting forecast exposure to unexpected costs to within acceptable limits.
2. Provide competitive rates by optimizing the power supply portfolio and ensuring that the best available price is obtained while complying with the requirements of this Policy and City codes, regulations, and policies.
3. Establishing, measuring and managing authorizations and transaction al authority limits associated with optimizing PWP’s portfolio of energy, fuel and related products to ensure adequate mitigation of risks associated with necessary participation in market transactions.
4.0 TRANSACTION POLICY AND LIMITS
All executed transactions shall conform to the Policy as described in this document, as well as in the risk management program procedures, guidelines and controls manuals as developed and adopted by PWP’s Energy and Credit Risk Management Committee (“RMC”), which is further defined in Section 5.4 below.
Authority to exe cute transactions shall be subject to enabling agreements and contracts or contractual forms approved by the City Council . In all cases the Pasadena Municipal Code provides the final authorization rules and regulations for energy purchases.
Failure to observe the Transaction Policy and Limits when executing transactions is a violation of the Policy and is subject to disciplinary action. The key requirements and limitations for transactions are as follows:
40 4.1 Anti-Speculation
Speculative buying and/or selling of energy products is prohibited. In no event shall transactions be entered into to speculate on market conditions. Speculation is defined as any of the following transaction types:
• Buying energy products that are not needed for meeting forecasted retail load or wholesale obligations; and,
• Selling energy products that are not owned and excess to forecasted retail load.
The simultaneous purchase of an energy product and sale of a corresponding energy product shall be permitted provided that the net value (proceeds) from the transaction is derived from the utilization of owned and excess transmission or generation capacity.
Credit sleeving is an arrangement where a more financially reputable entity acts as an intermediary for a smaller undercapitalized entity in the execution of a transaction. Contract sleeving is an arrangement where an entity acts as an intermediary between two entities to bridge a contract gap that exists between the two entities. PWP may not act as the intermediary in either a credit or contract sleeve. However, PWP may participate in a sleeving transaction provided that the intermediary sleeving the transaction is an approved counterparty in accordance with the Counterparty Credit Evaluation and Procedures Manual and the transaction is otherwise in compliance with delegated authority.
4.2 Counterparty Limitations
Transactions must be with counterparties approved by the Energy Risk Manager in accordance with the Counterparty Credit Evaluation and Procedures Manual Any transactions with counterparties that do not have approved and/or executed enabling agreements in place with PWP must be contingent upon the approval of a stand alone contract or long form confirmation governing the terms of such applicable transactions..
Regardless of po tential credit concerns with the CAISO, PWP may continue to transact with the CAISO to the extent necessary to meet retail loads, wholesale obligations, utilize existing resources, and/or as required by the CAISO Tariff or any statutory or regulatory requirement.
During a system emergency or a market emergency , a limited number of short-term transactions with non-approved counterparties may be required, and may req uire exceeding established credit limits, in order to meet retail loads and/or maintain power system stability.
A system emergency is defined as a natural disaster, weather-related incident, major equipment failure, gas supply curtailment or operational flow order requiring immediate response, or CAISO failure to deliver power for any reason that affects PWP’s ability to provide power to retail load or meet obligations. A market emergency is defined as a notification of a declared emergency from the CAISO or an Operational Flow Order from a Pipeline Operator such as SoCal Gas and supply cannot be obtained from PWP’s current list of approved counterparties.
If an emergency situation occurs, the PWP General Manager shall have the authority to obtain 41 resources on a short-term basis (up to 30 days) from non-approved counterparties and/or to exceed established credit limit s. In addition, the General Manager shall notify the City Manager within 48 hours of declaring an emergency. As soon as is practically possible at the next meeting of the Municipal Services Committee (“MSC”) and the City Council, the PWP General Manager shall file a full report of the circumstances of any such emergency transactions, or such additional transactions as may be necessary to provide resources on a continuing basis to retail customers from the MSC and the City Council.
Specific details for counterparty credit risk management shall be prescribed in the Counterparty Credit Evaluation and Procedures Manual as developed by the RMC and revised from time to time.
42 4.3 Transaction Types
All transactions must be Approved Transaction Types, as authorized by the City Council and the Policy.
Th
e City Council must provide authorization for all transactions via approval of the Policy. In general, the City Council authorizes the City Manager and/or PWP General Manager to enter into contracts for various types of energy-related products (e.g., energy, capacity, transmission, natural gas, environmental and emission credits, etc.) by way of adopting an “Authorizing Resolution”. Appendix A, which shall be updated and maintained by the RMC, summarizes applicable Authorizing Resolutions adopted by the City Council. PWP is required to conduct a comprehensive review of the Authorizing Resolutions at least once every three years and make recommendations to update the Authorizing Resolutions as necessary.
Th
e Policy may further limit the use of the Authorizing Resolutions, but cannot expand upon the transaction authority granted by the City Council. For specific transactions that are not covered by an Authorizing Resolution or exceed the scope of this Policy, the City Council may also provide authorization for the contract or transaction by motion pursuant to a staff recommendation.
In addition to trading the various energy related products in their “physical” form, these products may also be traded as financial products to the extent authorized by City Council resolution, up to the authorization limits of the General Manager. Such transactions would be used to only manage (hedge) financial risks associated with PWP’s open positions (retail load or wholesale sales commitments) by set price caps and floors. Examples include:
• Financial Commodity Swaps for Natural Gas and/or Powers • Financial Commodity Options and Swaptions
• Natural Gas or Electric Exchange-Traded Products (Futures and Options) • Natural Gas or Electric Options
• Emission Allowances
• Renewable Energy Credits
• Carbon Products
• Capacity Products
• Firm and Non-Firm Transmission
Any financially-settled schedules or transactions with the CAISO of otherwise approved physical transaction types (e.g., energy or transmission products including, but not limited to CAISO Auctioned Congestion Revenue Rights) are expressly permitted by this Policy.
43 4.4 Transaction Authorizations and Limits
The authorized transactions and limits for authorized personnel are shown below.
Transaction Authorizations and Limits
Real Time
Schedulers Pre- Schedulers
Energy
Trading
Manager
Assistant
General
Manager of
Power Supply
General
Manager
General
Manager
with City
Managers
Approval
Type
Purchases
to meet
load,
covered
sales
Purchases to
meet load,
covered sales
Purchases to
meet load,
covered sales,
hedges
Purchases to
meet load,
covered sales,
hedges
Purchases
to meet
load,
covered
sales,
hedges
Purchases to meet
load, covered sales,
hedges
Term
< 1 Day < 1 Week < 1 Month < 6 Months < 1 Year
> 1 year < 3
Years
Lead
Time
< 1 Day
Hourly to
balance of day
< 1 Week
Day ahead to balance
of week
< 1 Month
Week ahead to
month ahead
< 6 Months
Month ahead to
six months ahead
< 1 Year
Up to 1
year.
< 2 Years
Up to 2 years
Same-day
transactions
or day-
ahead
activities
performed
on
weekends
and
holidays
Transaction can be
executed within
one- week period
prior to the
transaction
effective date or
initial delivery
date
Transaction can
be executed
within one-
month period
prior to the
transaction
effective date or
initial delivery
date
Transaction can be
executed within
the six- month
period prior to the
transaction
effective date or
initial
delivery date
Transaction
can be
executed
within the
twelve-
month
period prior
to the
transaction
effective date
or initial
delivery date
Transaction can be
executed within the
eighteen-month
period prior to the
transaction
effective date or
initial delivery date
Total
Volume
Up to 100% of
estimated
requirement
or available
Up to 100% of
estimated
requirement or
available
Up to 100% of
estimated
requirement or
available
Up to 115% of
estimated
requirement or
available
Up to 115% of
estimated
requirement
or available
Up to 115% of
estimated
requirement or
available
Counter
-party
Credit
From pre-
approved
counterparty
credit list
From pre-
approved
counterparty
credit list
From pre-
approved
counterparty
credit list
From pre-
approved
counterparty
credit list
From pre-
approved
counterparty
credit list or
with credit
facility
From pre-approved
counterparty credit
list or with credit
facility
44 * Note: Energy sales and purchases are limited to sales from capacity and purchases to meet load requirements (or to replace higher cost resources or limited energy/hydro).
4.4.1 Maximum Transaction Term
The maximum term of any transaction term for purchases and sales of energy and related products is limited to three years unless otherwise approved by the City Council.
Transactions with a term up to three years can be executed within the two year period prior to the transaction effective date or initial delivery date with the approval/concurrence of the City Manager. The RMC, with the approval of PWP General Manager, will have the responsibility to establish transaction term authority limits of up to six months for various personnel involved in the Front Office functions.
4.5 Trade Execution and Authorized Personnel
All transactions must be confirmed over recorded phone lines or via electronic media (e.g. counterparty/exchange software application).
Only authorized PWP staff in the Energy Trading Group within the Power Supply Business Unit may conduct energy purchase and sale transactions. The RMC, with the approval of PWP General Manager, will have the responsibility to delegate specific transaction authority to designated Energy Trading Group personnel, not to exceed the limits of the PWP General Manager as delegated in the Policy. Such authorizations are maintained in the Energy Trading, Risk and Settlements Procedures and Controls Manual as developed, adopted and updated from time -to-time by the RMC. Authorized personnel in the Energy Risk and Credit Group of PWP’s Finance, and Administration Business Unit shall be responsible for informing counterparties of such approved authorizations, including transacting authority and restrictions, along with product types and/or term and dollar limits.
All personnel S pecific details for counterparty credit risk management shall be prescribed in the Counterparty Credit Evaluation and Procedures Manual as developed by the RMC and revised from time to time.
with designated responsibility for energy risk and credit control functions and settlement and processing functions are strictly prohibited from executing transactions.
5.0 RISK GOVERNANCE STRUCTURE AND RESPONSIBILITIES
This section defines the overall roles and responsibilities for implementation of this Policy. Specific details of the roles and responsibilities of the oversight and operational divisions within the energy and credit risk management program at PWP are outlined in the Energy Trading, Risk, and Settlements Procedures and Controls Manual as developed by the RMC and revised from time to time.
5.1 City Council
45 The City Council is responsible for adopting high-level broad policies and providing strategic direction as contained in this Policy document. The City Council adopts the Policy based upon its review of the recommendations made by the RMC, as reviewed by the MSC, 46 and directs the General Manager of PWP to execute the Policy. The City Council will review the Policy every two years and approve new enabling agreements under which wholesale energy agreements can be made.
5.2 Municipal Services Committee
The City Council Municipal Services Committee (“MSC”) provides direction to PWP on long- term planning and policy matters relating to utility operations. The MSC will receive and review management energy and credit risk reports prepared by the RMC, as needed or upon request, and make recommendations consistent with the Policy to the City Council.
5.3 General Manager
The General Manager reports to the City Manager and has overall responsibility for executing and ensuring compliance with the Policy adopted by the City Council. The General Manager provides regular updates to the City Manager on the energy portfolio risk management activities. In addition, the General Manager provides reports as needed or upon request to the MSC on the energy portfolio risk management activities and annual reports to the City Council on the adequacy of the Policy, including any necessary changes to the Policy.
5.4 Energy and Credit Risk Management Committee
The Energy and Credit Risk Management Committee (“RMC”) is responsible for overseeing compliance with the Policy, and reviewing and recommending changes to the Policy as necessary. The RMC is also responsible for authorizing all products and commodity types as further detailed in the Energy Trading, Risk and Settlements Procedures and Controls Manual as developed and adopted by the RMC. In addition, the RMC is responsible for creating and implementing a sound approach to managing risk consistent with the business strategy and risk tolerance of the organization as defined by the City Council. As such, the RMC is critical to overseeing and reviewing the risk management process and infrastructure and managing PWP’s risk exposure.
The RM C will consist of the following City staff:
• PWP General Manager (RMC Chairperson);
• PWP Assistant General Manager – Power Supply;
• PWP Assistant General Manager – Finance and Administration; • Wholesale Operations Manager / Energy Trading Manager; • Wholesale Operations Manager / Energy Settlements Manager; • Power Resources Planning Manager; and,
47 • Wholesale Operations Manager / Energy Risk and Credit Manager (RMC Secretary).
T
he Assistant City Manager (or d esignee), The Director of Finance (or designee), the Internal Audit Manager (or designee), and the Assistant City Attorney (or designee) will act as advisors to the RMC.
Th
e RMC shall meet regularly, but at a minimum monthly, to discuss risk management, operating processes, trading controls and authorizations. The RMC meetings can be conducted in person or virtually using electronic media. A quorum of at least 4 committee voting members must be present.
5.5 Management Oversight/Separation of Duties
Risk management oversight at an operational level is accomplished through supervisory review and approval with appropriate separation of duties. PWP’s risk management functions shall be segregated into Front Office, Middle Office and Back Office as outlined below to maintain effective system of controls over financial and operational risks.
Front Office
(Transactions)
Middle Office
(Control)
Back Office
(Processing)
Power Supply Business
Unit
PWP Finance and
Administration
Business Unit
PWP Finance and
Administration Business
Unit and the City Finance
Department
Energy Trading Manager Energy Risk and Credit
Manager
Energy Settlements
Manager
Demand forecast and
portfolio position
Portfolio optimization
and hedging strategy
adhering to Hedge
Policy
Marketing contact
Customer contact
Transaction structure
Pricing/negotiation
Transaction execution,
booking, scheduling,
and nominations
Master Agreement /
Contract Negotiations
Independent control
Risk identification
Risk measurement
Risk monitoring
Mark-to-market
Risk limits
Risk metrics
Hedge Policy
compliance
monitoring
Credit em ergency
shutdown
Management reporting
Counter-p arty credit
authorization
Confirmations
Reconciliations
Energy Accounting
Shadow, Initial,
Final, True-up, and
CAISO Settlement
Contract management
and compliance
Approve invoices
(accounts payable)
Issue invoices
Manage Escrow
Accounts
48 The Middle and Back Offices shall be independent from the Front Office functions, and shall provide oversight of the risks assumed by the Front Office in the course of transacting energy and energy related products and services.
Some of the front, middle, and back office functions may be contracted to a third party vendor. PWP has currently engaged Alliance for Cooperative Energy Services Power Marketing LLC ("ACES") to perform its real-time trading activities, along with limited Middle and Back Office functions. Additional support functions such as Legal, Treasury/Finance/Audit, and Information Technology will be drawn upon as needed to support the segregated structure.
5.5.1 Front Office
The Front Office is primarily responsible for resource planning and procuring resources to meet the physical, financial and contractual requirements of PWP’s energy and fuel portfolio. The Front Office shall maintain an integrated and balanced portfolio of resources to cover retail forecasted load requirements, and establish minimum coverage requirements for capacity and energy.
The Front Office is responsible for ensuring that the procedures and processes needed to transact business within the Policy are in place and shall perform all duties related to actual transacting in the wholesale natural gas and energy markets. PWP Assistant General Manager – Power Supply is responsible for managing the Front Office. The Front Office is the primary interface with potential wholesale transacting counterparties. Detailed responsibilities of the Front Office are outlined in the Energy Trading, Risk and Settlements Procedures and Controls Manual.
5.5.2 Middle Office
The Middle Office is primarily responsible for providing risk oversight and controls.
The Middle Office will monitor, verify and report on the compliance with the Policy and risk management program, review all risk management activities, determine portfolio and credit exposure, transaction compliance and on-going approval of counterparties. The Middle Office will be responsible for reporting to the RMC on risk management issues, and recommending to the RMC when changes in policy or operating procedures are required. These recommendations may relate to the temporary or permanent halting of transactions with one or more counterparties, exceptions to rules and procedures, other operational exceptions, and any other topic the Middle Office believes represents an unacceptable risk exposure. The Energy Risk and Credit Manager will be responsible for managing the middle-office functions and will report to PWP Assistant General Manager – Finance and Administration.
The Middle Office enforces and updates as necessary the Policy and develops and updates related procedures and controls manuals so that portfolio management functions occur in compliance with the City Council-adopted Policy and RMC adopted procedures, guidelines and controls. The functions of the Middle Office can be broadly defined as Quantitative Analysis, Compliance Review, Credit Administration, and Management Reporting.
49 Quantitative Analysis
The Middle Office performs necessary risk analysis to evaluate the risk exposure on a transactional and portfolio basis.
Compliance Review
The Middle Office monitors all transactions to ensure compliance of transactions with the RMC Policy procedures, guidelines and controls.
Credit Administration
The Middle Office monitors counterparty creditworthiness. The Middle Office objectively measures and monitors credit limits and credit histories, and without approval of the RMC, may temporarily halt trading or, with the approval of the RMC, permanently halt trading with an approved counterparty because of credit exposure or credit condition. In the event of any trading suspensions, the Middle Office will communicate with Front Office in writing or via email the term of suspension.
Management Reporting
The Middle Office administers reports to the RMC related to risk management, and performance in alignment with the Policy and related procedures, guidelines and controls and the requests of the RMC.
5.5.3 Back Office
The Back Office is primarily responsible for energy accounting and settlements, settlement and payment of bills, recording and reconciling transactions, contract management and compliance. The Back Office is also responsible for accurate transactions records and settlements, independently monitoring and recording transactions into a tracking database, and verifying and reporting on compliance with procedures as reflected in deal tracking documentation. The Back Office functions are detailed in the Energy Trading, Risk and Settlements Procedures and Controls Manual. The Back Office is managed by the Wholesale Operations Manager/Energy Settlements Manager who reports to PWP Assistant General Manager – Finance and Administration.
6.0 POLICY MONITORING AND COMPLIANCE
6.1 Monitoring and Reporting
PWP shall prepare risk management reports containing an analysis of physical and financial positions of all energy resources in its energy portfolio and any potential risks associated with its energy portfolio. Such reports shall be prepared by the Middle and Back Office staff, and reviewed by the RMC. The frequency and content of the risk management reports for each oversight body shall be prescribed in the Energy Trading, Risk and Settlements Procedures and Controls Manual.
50 6.2 Compliance Exceptions
Compliance exceptions are actions which violate the authority limits or directives set forth herein or in the risk management program procedures and controls manuals as developed and adopted by the RMC.
6.3 Reporting of Exceptions
Exceptions to mandated policies, procedures and regulations shall be reported to the RMC within 48 hours after they are identified as provided in the risk management program procedures and controls manuals as developed and adopted by the RMC.
6.4 Assessment
Compliance with the Policy and with the specific procedures, guidelines and controls as developed and adopted by the RMC shall be subject to a review every three years by an independent consulting firm that the RMC, with concurrence of the Director of Finance , may appoint to evaluate the effectiveness of mandated controls. The hired firm will also verify that stated objectives are being carried out, and that internal controls are in place for processes to comply with the Policy. The firm will also identify any recent changes in industry best practices that may warrant program revisions. Upon completion of the assessment, the report shall be provided to the RMC, City Manager and Director of Finance. The RMC will review any recommended changes or enhancements to the Energy and Credit Risk Management program and update the risk management procedures and controls manuals as required. The RMC will also recommend updates to the Policy and make a recommendation to the City Council on the adequacy of the Policy and necessary changes.
7.0 CONFLICT OF INTEREST
In accordance with the Pasadena Municipal Code and California law, personnel involved in transacting and oversight of PWP’s supply resource acquisition programs may not engage in financial conflict of interest, unless the City is duly informed and it elects to waive such conflicts. All such personnel are: (1) strictly forbidden from directly investing in any business entity that could potentially enter into energy transactions with PWP ; and, (2) required to complete, on an annual basis, the Employee Qualifications and Code of Conduct and Form 700 Disclosures forms and submit these forms to the City Clerk; and, (3) required to provide written acknowledgement of compliance with this Policy by completing the Energy Risk Management Policy Acknowledgement and Employee Compliance Form each year after Risk Policy training is provided by the Energy Risk and Credit Manager.
The PWP Energy Risk and Credit Manager is responsible for routinely reviewing the Form 700 of each personnel engaged in the supply resource decision-making process for the purpose of identifying potential financial conflicts of interest. The City Attorney’s Office will assist the
51 PWP Energy Risk and Credit Manager in reviewing these forms and providing legal advice in connection with such reviews.
Th
e Energy Trading, Risk and Settlements Procedures and Controls Manual contains additional detailed requirements for personnel conflict of interest disclosure and prohibitions as to acquiring or maintaining financial interest in energy trading counterparties. 52 Appendix A
Transaction Type Authority: City Council Resolutions
This table summarizes the City Council resolutions authorizing various transaction types to be carried out by PWP . A list of Authorized Transaction Types shall be updated and maintained by the RMC, consistent with the Energy and Credit Risk Management Policy and approved City Council Resolutions.
Resolution
(Dated)
To Contract for Energy Products1
7452
(12-16-1996)
• Air emissions credits (NOx and SOx)
75492
(10-20-1997)
• Contracts for products <$25,000 may be authorized by
the General Manager
• Products <$75,000 may be authorized by the City
Manager
8243
(5-12-2003)
• Physical Natural gas commodity
• Physical Petroleum products
• Gas transaction master enabling agreements (e.g.,
NAESB, bilateral)
4184-2
(10-22-2007)
• Physical Electrical energy
• Physical Electrical capacity
• The transmission of electrical energy or capacity or both • Electric generation and transmission capacity for
planning purposes (e.g., RA)
8965
(8-3-2009)
• Congestion revenue rights (CRR’s) for use in CAISO
operated transmission markets
9063
(10-4-2010)
• Environmental attributes such as RECs, green tags,
carbon credits, and any other environmental attributes
as may be defined in the future
• Carbon-related permits, credits, allowances, certificates, offsets and similar instruments
9216
(7-9-2012)
• Designates the General Manager as the City’s
“Authorized Account Representative” and the Assistant
General Manager as “Alternative Authorized Account
Representative” to conduct transactions related to the
California Cap and Trade
53 9221
(7-30-2012)
• Authorizes The City Manager or General Manger of
Water and Power Department to execute and
implement agreements with CAISO
9959
(11-14-2022)
• Designates formally Water and Power Department
authorities as Authorized/Designated Representatives
to execute transactions or submit reporting in regulated compliance programs
• Supersedes Resolution 9216 (7-9-2012) designed
specifically for Cap and Trade
54 Appendix A (Continued)
* Notes: 1. Council resolutions authorize the General Manager to enter into agreements for the purchase, sale, exchange, storage, transportation, transfer, and/or participation in auctions, as may be applicable for the authorized energy products.
2. The use of Resolution 7549 restricts the use of financial derivatives. 55 Appendix B
Acknowledgement and Employee Compliance Form
The purpose of this form is for the individual PWP employee involved with energy risk and credit management activities, including but not limited to, Front Office, Middle Office or Back Office activities associated with transactions, energy trading, risk management and other related activities to acknowledge in writing that they have received, read and understood the Energy and Credit Risk Management Policy (Policy) and related procedural documents. And for the employee to acknowledge the confidential and proprietary nature of the information used in energy risk management activities and agree to maintain such information as confidential.
Th
e employee recognizes that violating the Policy and related policies and procedural documents can lead to disciplinary actions or constitute grounds for progressive disciplinary action, which may include termination of employment.
Th
e undersigned hereby certifies that he/she has received, read and understood the Policy and related procedural documents.
Em
ployee Nam e
T
itle
D
epartment
Ma
nager/Supervisor
C
ontrol Office ( ) Front Office
( ) Middle Office
( ) Back Office
( ) Other
Signature Date
56 Appendix C
Glossary of Energy and Credit Risk Management Terms
The following are definitions of terms used in energy and credit risk management:
Authorized Counterparty List: A list that indicates the approved counterparties and their specific credit limit and current credit rating.
California Independent System Operator (CAISO): A state chartered, California non-profit public benefit corporation that is responsible for ensuring the efficient use and reliable operation of the electric transmission grid (system) in the state of California.
Collateral: An obligation or security linked to another obligation or security to secure its performance.
Congestion: Physical constraints at certain points on electricity transmission networks.
Congestion Revenue Rights (CRRs): CRRs are financial instruments made available through the CAISO’s allocation process where a certain amount of CRRs are provided at no cost to load serving entities (such as PWP), the CAISO’s auction process and a secondary market that enable CRR holders to manage the variability in congestion cost based on Locational Marginal Pricing.
Counterparty: A participant in a physical or financial contract.
Counterparty Risk: This is the risk that a counterparty to a transaction or contract will default or fail to perform) on its obligation under the contract.
C
redit Limit: Pre-established dollar valued trade limit set for each counterparty based upon their financial strength, trading and payment history.
Day-Ahead Market: The market trading for the day before the operating day.
Derivative: Any financial instrument, such as a futures contract, Swap or Option, which derives its value from the value of an underlying security or physical commodity.
Energy Portfolio: The collective term for PWP’s generation assets, short and long term power supply contracts for natural gas and power, transmission assets, transactions or trades, and retail load obligation.
57 Energy Portfolio Open Position – The amount or percent of the load obligation that is not covered by available resources (power and/or natural gas). A negative or short portfolio position implies that available resources are less than the load obligation and a positive or long portfolio position implies that available resources exceed load obligation.
Energy Risk Management: The identification and management of PWP’s energy portfolio risks to support achievement of its business objectives.
Estimated Available: The estimated available for a given period is equal to excess resources above the forecasted load and/or compliance/reliability obligation.
Estimated Requirement: The estimated requirement for a given period is the forecasted load and/or compliance/reliability obligation less available resources.
Federal Energy Regulatory Commission (FERC): The U.S. government body that regulates interstate energy markets.
Hedge: A transaction that reduces price risk relative to a position that an organization has or intends to take in the physical or financial market.
Hedging: This is the use of energy-related transactions to limit or reduce the likelihood of financial loss due to fluctuations in market conditions. For example, buying or selling physical or financial energy-related products to offset short or long inventory positions.
Liqui
d Market: A market in which buying and selling can be performed with ease, due to the presence of a large number of buyers and sellers prepared to trade substantial quantities at small price differences. (The opposite is an illiquid market.) Locational Marginal Pricing (LMP): A method of pricing the cost of congestion into electricity prices.
Lo
ng: A position in which an asset or right is owned or a position that appreciates in value if the value of the underlying instrument or market price increases.
Mar
ket (Price) Risk: Risk due to changes in the market prices of energy commodities which can have an adverse impact on energy cost
M
arking-to-Market (MTM): The process of valuing a position or portfolio against a market clearing-price.
North American Energy Standards Board (NAESB): NAESB serves as an industry forum for the development and promotion of standards which will lead to a seamless marketplace for 58 wholesale and retail natural gas and electricity, as recognized by its customers, business community, participants, and regulatory entities.
North American Electric Reliability Corporation (NERC): A not-for-profit entity whose mission is to ensure the reliability of the bulk power system in North America.
Netting Agreement – A contingency agreement in which debit and credit positions are allowed to offset each other .
Operational and Organizational Risk: The risk that deficiencies in internal control or information systems or failure to effectively execute business activities will result in unexpected economic loss.
Physical Hedge – an energy input purchase or retail/wholesale sale transacted to meet physical requirements.
Real-Time – To schedule for delivery of physical power on an hourly basis.
Regulatory and Legal Risks: The risk that contracts are not legally enforceable or documented correctly or that regulatory agencies or courts may take actions or adopt measures which may potentially impact the portfolio value
Risk: Refers to uncertainty about future cash flows and asset values, and it consist of an event that could potentially cause actual outcomes to differ from expected outcomes, either negatively or positively
Short: A po sition in which an asset or right is not owned or a position that increases in value if the value of the underlying instrument or market price decreases.
Sleeving: A transaction whereby two counterparties which do not have credit with each other, ask a third party that has credit with both to be a middleman to facilitate a trade.
Speculative Trading: Taking positions in any commodity price with the expectation that prices will move in a particular direction, including buying power that is not needed with the intent to resell at a profit or selling power that is needed with the intent to repurchase it at a later date and make a profit.
System Emergency:
(i) A condition that exists when extraordinary events outside normal operating conditions occur that threatens system stability, such as the unplanned loss of a resource; or
(ii) A natural disaster, major equipment failure, gas supply curtailment or operational flow order requiring immediate response; or 59 (iii) CAISO failure to deliver power for any reason that affects PWP’s ability to provide power to retail load or meet obligations.
Transaction: All of the approved Transaction types defined in the Policy, including physical or financial obligations of PWP and one or more counterparties related to energy, capacity, ancillary services, transmission service, natural gas, renewable energy credits and greenhouse gasses.
Transaction Activities: The activities involved in the energy supply decision process involving Transactions as defined in the Policy.
T
ransaction Limits (or Authorized Transaction Limits) – Predefined parameters that restrict transactions. These can include limits on volume, duration, dollar amounts and approval authorities.
Volatility: A measure of the variability of a market factor, most often the price of the underlying instrument.
Volumetric Risk: The risk that fluctuations in load or resources will adversely affect net revenues
Wes
tern Electricity Coordinating Council (WECC): A North American Electric Reliability Council for the Western Interconnection.
Western System Power Pool (WSPP): WSPP is an agreement and an organization that creates power trading opportunities and allows WSPP members to manage power delivery and price risk. As of January 1st, 2025, the current WSPP Agreement with effective date October 21, 2024 is the most commonly used standardized power sales contract in the electric industry. It is approved by the FERC and used by jurisdictional and non-jurisdictional entities. Once signed, the Agreement allows instant access to power trading within the membership. 60 ITEM #2
61 62
63 64
65 66
67 395 S TOPANGA CANYON BLVD #203 TOPANGA CA 90290 | Phone 310 455 2125 | Fax 310 455 2121 | CAMPIONWALKER.COM CAMPION WALKER landscapes
FAIRFIELD CIRCLE
800 Block Fairfield Cir.
Pasadena, CA 91106
STREET TREE SUGGESTIONS
March 11, 2025
Attachment A. - Fairfield Circle Replacement Tree Species by Campion Wa lker 68 FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
800 Block Fairfield Cir., Pasadena, CA 91106
03/11/25
pg. 2
CAMPION WALKER landscapes
FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
LAGERSTROEMIA ‘NATCHEZ’ - NATCHEZ HYBRID CRAPE MYRTLE
Tree Shape: Rounded or Vase
Foliage Type: Deciduous
Maximum Tree Height: 25 feet
Canopy Width: 15-25 feet
Growth Rate: ~12-24 in/year
Exposure: Full sun
Water Use Rating: Medium
Sunset Climate Zone: 7 - 10, 12 - 14, 18 - 21
USDA Hardiness Zone: 7, 8, 9, 10
Leaf color: Bronze or Purple or Reddish
Fall Color: Yes
Flowers: Showy
Flower Color: White
Flower Time: Summer
Fruit: Small Brown Capsule
Fruiting time: Fall
Bark Color: Striking, Light Green, Pink or Red Brown, Exfoliating, Smooth Litter Type: Dry Fruit
PROS
• Showy white blooms attract pol -
linators, making it a great choice
for supporting local wildlife
• This relatively small tree is com -
patible with the narrow parkway
conditions at Fairfield Circle.
• Drought-tolerant once estab -
lished, making it well-suited for
California’s dry climate.
• Fast growing tree
• This variety is said to be resistant
to Powdery Mildew
• Listed as Fire-resistant by the
California Native Plant Society
CONS
• Winter Deciduous, meaning it
loses it leaves in the winter.
• Susceptible to Sooty Mold and
Aphids***Fire-resistant does not
mean fire-proof. Even fire-re-
sistant plants will burn if not well
maintained or in cases of extreme
fires.
69 FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
800 Block Fairfield Cir., Pasadena, CA 91106
03/11/25
pg. 3
CAMPION WALKER landscapes
FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
ARBUTUS ‘MARINA’ - STRAWBERRY TREE
Tree Shape: Rounded or Vase
Foliage Type: Evergreen
Maximum Tree Height: 40 feet
Canopy Width: 30 feet
Growth Rate: ~12-24 in/year
Exposure: Sun to Part Shade
Water Use Rating : Medium
Sunset Climate Zone: 8 - 9, 14 - 24
USDA Hardiness Zone: 9, 10, 11
Leaf color: Dark Green
Flowers: Inconspicuous
Flower Color: Pink or Rose
Flower Time: Fall, Winter, Spring or Summer
Fruit: Small Red or Yellow Berry
Fruiting time: Fall or Winter
Fruit Value: Wildlife use it
Bark Color: Red Brown, Exfoliating, Smooth
Litter Type: Wet Fruit
PROS
• Its evergreen nature ensures year-
round greenery.
• Rosy pink blossoms attract pol -
linators, making it a great choice
for supporting local wildlife
• Drought-tolerant once estab -
lished, making it well-suited for
California’s dry climate.
• This relatively small tree is com -
patible with the narrow parkway
conditions at Fairfield Circle.
• Its slow to moderate growth rate
and manageable size make it a
versatile option for urban land -
scapes.
• Strong branch strength
• Listed as Fire-resistant by the
California Native Plant Society
CONS
• Susceptible to Anthracnose,
Phytophthora, Root Rot, Rust and
Scales, Thrip
• May experience issues with leaf
drop, yellowing, or wilting due to
environmental stress or improper
care
• Relatively slow growing that will
take time to reach a mature size
• The dropping of ripe fruit on side -
walks can be messy and slippery
***Fire-resistant does not
mean fire-proof. Even fire-re-
sistant plants will burn if not well
maintained or in cases of extreme
fires.
70 FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
800 Block Fairfield Cir., Pasadena, CA 91106
03/11/25
pg. 4
CAMPION WALKER landscapes
FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
LAURUS NOBILIS - BAY LAUREL
Tree Shape: Conical or Rounded
Foliage Type: Evergreen
Maximum Tree Height: 40 feet
Canopy Width: 15-30 feet
Growth Rate: ~12-24 in/year
Water Use Rating: Medium
Sun Exposure: Full sun to Part shade
Sunset Climate Zone: 5 - 9, 12 - 24
USDA Hardiness Zone: 8, 9, 10
Leaf color: Bluish Green or Silver or Gray Green
Flowers: Fragrant
Flower Color: Green or White or Yellow
Flower Time: Spring
Fruit: Small Black or Purple Berry
Fruiting time: Fall
Bark Color: Dark Gray or Light Gray, Fissured
Litter Type: Dry Fruit
PROS
• Its evergreen nature ensures year-
round greenery.
• This tree is also quite
drought-tolerant once established,
making it a suitable option for
urban landscapes.
• Medium branch strength
• Attracts wildlife with its flowers
and fruit
• Considered Fire-resistant by the
National Gardening Association
CONS
• Susceptible to Phytophthora, Root
Rot and Psyllid, Scales
• Relatively slow growing that will
take time to reach a mature size
***Fire-resistant does not
mean fire-proof. Even fire-re-
sistant plants will burn if not well
maintained or in cases of extreme
fires.
71 FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
800 Block Fairfield Cir., Pasadena, CA 91106
03/11/25
pg. 5
CAMPION WALKER landscapes
FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
HESPEROCYPARIS FORBESII - TECATE CYPRESS
Tree Shape: Columnar or Rounded
Maximum Tree Height: 25 feet
Canopy Width: 20 feet
Growth Rate: ~36 in/year
Exposure: Full sun
Water Use Rating: Low
Sunset Climate Zone: 8 - 14, 18 - 20
USDA Hardiness Zone: 7, 8, 9
Leaf color: Green
Cones: Fragrant
Cones: Medium Brown, Gray or Mostly Green Cone
Pollen time: Fall
Fruit Value: Wildlife use it
Bark Color: Dark Brown or Red Brown, Exfoliating, Scaly, Smooth Litter Type: Dry Fruit
PROS
• This California Native tree is
drought adapted. Once establish,
the tree requires very little sup-
plemental water.
• T ecate cypress is an upright and
columnar growth habit is ideal for
narrow parkway conditions like
those of Fairfield Circle.
• Its evergreen nature ensures year-
round greenery,
• Grows quickly to 12-15 ft., then
slows to 2-3 in. of growth per
year.
• Provides cover and nesting habitat
for birds
• Strong branch strength
CONS
• T ecate cypress is a fire-adapted,
fire-dependent species. It exhibits
adaptations that indicate “strict
dependence on fires of a particu -
lar frequency”. These adaptations
include serotinous cones that
release seeds when exposed to
the heat of fire, resinous foliage
that is highly flammable when dry
and thin bark.
***Fire-resistant does not
mean fire-proof. Even fire-re-
sistant plants will burn if not well
maintained or in cases of extreme
fires.
72 FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
800 Block Fairfield Cir., Pasadena, CA 91106
03/11/25
pg. 6
CAMPION WALKER landscapes
FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
ACER PALMATUM ‘SANGO KAKU’ - CORAL BARK JAPANESE
MAPLE
Tree Shape: Rounded or Vase
Foliage Type: Deciduous
Maximum Tree Height: 25 feet
Canopy Width: 10-15 feet
Growth Rate: ~12-24 in/year
Exposure: Filtered sun, Full sun, Partial sun
Water Use Rating: Medium
Sunset Climate Zone: 2 - 10, 12, 14 - 24
USDA Hardiness Zone: 5, 6, 7, 8
Leaf color: Green
Fall Color: Yes
Flowers: Inconspicuous
Flower Time: Spring
Fruit: Medium Samara
Fruiting time: Summer
Bark Color: Striking, Light Gray or Light Green, Furrowed, Smooth PROS
• This relatively small tree is com -
patible with the narrow parkway
conditions of Fairfield Circle.
• Features bright green leaves that
turn a vibrant yellow in the fall,
providing a striking seasonal
displays.
• Medium branch strength
• This tree is drought-tolerant and
resistant to many common pests
and diseases, ensuring it remains
healthy and attractive with mini -
mal maintenance.
CONS
• Winter Deciduous, meaning it
loses it leaves in the winter.
• May be less heat-tolerant than
other cultivars, requiring partial
shade in warmer areas.
• Susceptible to Armillaria, Root
Rot, Verticillium and Invasive Shot
Hole Borer, Aphids
73 FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
800 Block Fairfield Cir., Pasadena, CA 91106
03/11/25
pg. 7
CAMPION WALKER landscapes
FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
LYONOTHAMNUS FLORIBUNDUS SUBSP . ASPLENIIFOLIUS -
CATALINA IRONWOOD
Tree Shape: Conical or Rounded
Maximum Tree Height: 40 feet
Canopy Width: 15-20 feet
Growth Rate: ~24 in/year
Exposure: Full Sun
Water Use Rating: Low
Sunset Climate Zone: 14 - 17, 19 - 24
USDA Hardiness Zone: 8, 9, 10
Leaf color: Dark Green
Flowers: Showy
Flower Color: White
Flower Time: Summer
Fruit: Small Brown Capsule
Fruiting time: Fall
Bark Color: Striking, Light Gray or Red Brown, Exfoliating, Smooth, Striated Litter Type: Dry Fruit
PROS
• Its evergreen nature ensures year-
round greenery.
• Slender upright growth habit and
medium size is compatible with
the parkway conditions of Fair -
field Circle.
• Flat-topped clusters of white
flowers are produced in spring
and linger on the tree for months.
• Strong branch strength
• Fairly quick growing
• Offers a valuable food source for
various wildlife species
• Established trees are drought and
moderately frost tolerant, taking
temperatures down to about 15
degrees F .
• Listed as Fire-resistant by the
California Native Plant Society
CONS
• Susceptible to Phytophthora
• Sensitive to overwatering
• Prone to Chlorosis, or yellowing
leaves in heavy soils.
• Excessive litter from flowers,
leaves and bark
***Fire-resistant does not
mean fire-proof. Even fire-re-
sistant plants will burn if not well
maintained or in cases of extreme
fires.
74 FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
800 Block Fairfield Cir., Pasadena, CA 91106
03/11/25
pg. 8
CAMPION WALKER landscapes
FAIRFIELD CIRCLE | STREET TREE SUGGESTIONS
REFERENCES:
Baldwin, R. (n.d.). Plant Database. San Marcos Growers Wholesale Nursery, Santa Barbara, California. https://www.smgrowers.com/index.asp California Native Plant Society. (n.d.). Comprehensive-Fire-Resistant-Plant-List.
Fire Effects Information System (FEIS). (n.d.). Index of Species Information. Hesperocyparis forbesii. https://www.fs.usda.gov/database/feis/plants/tree/hesfor/all.html Urban F
orest Ecosystems Institute at Cal Poly. (n.d.). A tree selection guide. SelecTree. https://www.selectree.org/ Waterwise Garden Planner. (2023, October 30). https://waterwisegardenplanner.org/ 75 THANK YOU
CAMPION WALKER landscapes 395 S TOPANGA CANYON BLVD #203 TOPANGA CA 90290 | Phone 310 455 2125 | Fax 310 455 2121 | CAMPIONWALKER.COM 76 Master Street Tree Plan Amendment Request
The City of Pasadena - Department of Public Works received a request to replace the current, designated tree species (Italian Cypress Cupressus sempervirens) on Fairfield Circle.
Two replacement tree species are being considered:
As part of the City’s Master Street Tree Plan amendment process, please indicate your preferred replacement tree species above. Please select only one tree species.
Next, complete the requested information below, sign the form, and return this page using the enclosed prepaid envelope. Responses must be received by Monday, April 21.
A majority vote is required to move this amendment request forward. If a consensus is determined by staff, the results will be presented to the Urban Forestry Advisory Committee at a later date (to be determined).
Thank you for your participation and for supporting the City’s urban forest! Strawberry Tree (Arbutus ‘Marina’)
Check box to indicate preference
Bay Laurel (Laurus nobilis)
Check box to indicate preference
Name:
Address:
Signature:
Attachment B. - Fairfield Circle Community Survey
77 Pu
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Attachment C.
78 Procedure to Process Amendments to Master Street Tree Plan (MSTP)—Frequently Asked Questions (FAQs) Department of Public Works
Trees:
Contribute to community economic well-
being by enhancing enhance property values
by 7 to 20%
Provide neighborhoods with sense of identity
Provide sense of place—90% of Americans
consider beauty of trees very important
Improve water quality by intercepting storm
water & reducing runoff/soil erosion
Promote pedestrian activity
Provide evaporative cooling effect lowering
temperatures typically by 5 to 9 degrees
May reduce cost of summer cooling by 10 to 50%
Improve air quality by extracting 25 lbs. of carbon
from air per year (mature tree) & capturing
airborne particulate pollution, removing dust &
chemicals from atmosphere
Mitigate noise pollution by absorbing traffic &
other sounds from urban environment
QUESTION –What are the benefits of an urban forest?
QUESTION –What is the Master Street Tree Plan (MSTP)?
The MSTP, adopted by City Council in 1991, guides the City in planning for and maintaining a diverse & vital urban forest. The MSTP identifies a designated street tree(s) for each public street on a block-by-block basis ensuring each block has a unified & unique look. The MSTP is both a long-range policy guide & a living document that responds to changing conditions.
QUESTION –What is the goal of the Master Street Tree Plan (MSTP)? The goals of the MSTP are to:
Provide a planting/replanting master plan for new development & redevelopment Maintain species diversity
Protect inherent property values of homeowners & businesses while enhancing neighborhood character & aesthetics
Extend life span of trees by carefully matching species selection & site conditions (growing space considerations, water needs, sidewalks, overhead & underground utilities & offset carbon emissions ) QUESTION –Who decides what trees are planted on each street? The Urban Forestry Advisory Committee (UFAC), a subcommittee of the Design Commission, reviews, advises & makes recommendations to the City Council regarding the MSTP. Property owners have the ability to seek amendments to the MTSP using the process outlined in the attached flow chart.
QUESTION –Will the City Council’s approval of an amendment to the MSTP result in the removal of existing street trees?
A MSTP amendment only affects what tree species the City will be plant in vacant street tree sites. The City will not remove existing street trees. Following the approval of a MSTP amendment, the City will initiate the planting of vacant tree sites.
INFORMATION –For additional information regarding MTSP amendment process:
Please contact Darya Barar, Forestry Program Coordinator by telephone at (626) 744-3846 & e-mail at [email protected]
79 12
A rboristWESTERN
Winter 2019
two species varied (Table 1). Within
each climate zone, the 12 species of
trees were randomly planted in a
reference site and each of 4 parks.
Four replicates were planted in the
reference site (4 replicates x 12 spe-
cies, 48 trees), South Coast Research
and Extension Center (SCREC)
(Coastal) and University of Califor-
nia Riverside Citrus Experiment Sta-
tion (Inland). Irrigation schedules
were based on real-time reference
evapotranspiration (ETo) estimated
by California Irrigation Manage-
ment Information System weather
stations and varied by site. All other
maintenance practices such as prun-
ing, weed control, and pest manage-
ment were the same at both sites.
An additional 96 trees were planted
in 4 parks (2 replicates per park, 24
trees per park). Long-term field test -
ing at the UC plots and in nearby
parks allows for direct comparisons
of growth and longevity under a
range of site conditions. Growing
conditions and maintenance activi-
ties were more variable among park
sites than reference sites. All trees
are evaluated annually for the first 5
years after planting, and biannually
thereafter for 15 years.(Fig. 1).
Trees were obtained from 3 nurs-
eries, ranging in size from bareroot to
24” box, and were planted February
Introduction
Planting and stewardship of tree
species well-suited to site growing
conditions in the future as well as the
present is an important urban forest
climate adaption strategy (Roloff et
al., 2009; Yang, 2009). Stressors as-
sociated with climate change, such
as drought, heat, pests and extreme
weather events are already increas-
ing mortality in forests (Allen et al.,
2010). Adverse effects on tree health
can be amplified in cities because of
urban heat islands and the impacts of
existing stressors such as inadequate
soils, polluted air, contaminated
runoff and mechanical damage from
construction activities, equipment,
vehicles, and vandals. In the South-
west, urban forests are especially
vulnerable to climate change stress-
ors because most predominant na-
tive and non-native species rely on
supplemental irrigation to augment
natural precipitation (Hartin et al.,
Van der Veken et al., 2008).
Identifying and testing the re-
silience of tree species to climate
change stressors is critical to the
long-term stability of urban forests.
By gradually shifting the planting
palette to climate-ready trees, future
generations can benefit from health-
ier and more resilient urban forests
(McPherson and Berry, 2015).
This paper describes our initial
evaluation of survival and perfor-
mance of 14 species of trees being
tested in Southern California’s In-
land and Coastal communities as
part of the statewide Climate-Ready
Trees study. The study was initially
funded by the Western Chapter In-
ternational Society of Arboriculture
Britton Fund. This update follows
a report in Western Arborist on the
Climate-Ready Tree Study: Update for
Southern California Communities
E. Gregory McPherson, Alison M. Berry, Natalie S. van Doorn, James Downer, Janet Hartin, Darren Haver, and Erika Teach
early performance of trees evaluated
in the Sacramento region (McPher-
son et al. 2017).
Methods
Our approach used a 5-step process
to identify and evaluate the vulner-
ability and suitability of tree species
(McPherson et al. 2018) to climate
change pressures. Vulnerability was
defined as the degree to which a
species is affected by and unable to
cope with adverse effects of climate
change (Glick et al. 2011). Trees were
selected for testing based on evalu-
ation of climate induced risk factors
that impact their vulnerability or
resilience. Risk factors used in the
analysis are (1) habitat specificity:
sunlight exposure, soil texture and
pH, soil moisture (2) physiology:
drought tolerance, salt tolerance,
wind tolerance (3) biological interac-
tions: invasiveness, major or minor
pests and diseases, emerging pests
and diseases. Coastal and Inland
climate zones were identified based
on aggregating Sunset climate zones
(Fig. 1). Twelve species of trees were
selected for evaluation in each cli-
mate zone based on input from horti-
culturists, quantitative rankings and
availability from local nurseries. The
same 10 species were planted in both
climate zones, while the remaining
Identifying and testing the resilience
of tree species to climate change
stressors is critical to the long-term
stability of urban forests.
Attachment D. - UC Davis Climate Ready Trees Study
80 Arborist
13 WESTERN
Winter 2019
Figure 1. Locations of park and reference planting sites in the Inland and Coastal climate zones.
through April 2016. Volunteers coor-
dinated by the Hollywood Beautifi-
cation Team planted park trees, with
guidance from City of Los Angeles
Recreation and Parks Department
staff. UC staff planted trees at the
Irvine and Riverside reference sites.
Specific planting locations within
each site were randomly assigned to
each species, and trees were well wa-
tered and staked according to indus-
try guidelines at the time of planting.
A four inch mulch layer was applied
at all sites after planting and reap-
plied as needed.
Trees that died within the first
weeks after planting due to trans-
planting stress were replaced dur-
ing the second year of the project.
Trees that died for other reasons
were removed and not replaced.
Tree growth, health, and perfor-
mance were evaluated during sum-
mer in 2016, 2017 and 2018. Further
information on criteria for selecting
the 14 species, experimental design
and monitoring can be found in the
publication “Performance Testing
to Identify Climate-Ready Trees”
(McPherson et al., 2018).
The UCCE reference plots in Ir-
vine and Riverside are flat field sites.
The sandy loam soils have a neutral
pH (7.5-7.7). Trees received ample
drip irrigation during the first three
years of establishment.
The four Coastal parks are flat
turf areas that receive recreational
use and regular irrigation. Soils in
Westchester and Vista Del Mar are
very sandy. Vista del Mar has very
low soil nitrate (3.3 ppm) and is sub-
ject to salt spray because it is adja -
cent to the Pacific Ocean. Bogdanov-
ich Park is perched above the ocean,
and somewhat sheltered by groves
of mature trees. Westchester and Jim
Gilliam Parks are further inland, and
less strongly influenced by maritime
weather effects. Some trees in Jim
Gilliam Park appeared to be over-ir-
rigated.
Four Inland parks are in the San
Fernando Valley. Trees in the Han-
sen Dam Recreation Area (off the
Foothill Freeway, 210) are on an east-
facing slope with intermittent grass
and irregular irrigation. The Valley
Plaza site (North Hollywood) is ad-
jacent to the 170 Freeway. Sandy soil
and various broadleaved weeds chal-
lenge tree growth. The turf at Wood-
ley Park (Van Nuys, 405) is healthier
and more uniformly irrigated than at
the other two parks. Trees in the Hol-
leigh Bernson Memorial Park (Porter
Ranch) appear over-irrigated and are
subject to the windiest conditions.
Data from the CIMIS stations
closest to the reference sites collected
during 2016-18 indicated that trans-
plants were not exposed to unusual
temperatures. In Riverside trees
were briefly exposed to air temper -
atures below freezing (-0.4 °C for 1
hour in 2018). Over the 3-year pe-
riod in Riverside, ETo averaged 12%
more than the historic normal (1,320
mm), and average annual tempera-
ture by month was 6% greater. Dur-
ing 2016-18, annual precipitation at
the Riverside reference site was 10%
less than the historic normal (220
mm). In Irvine the average ETo for
2016-18 was comparable to the his-
toric norm (1,276 mm), but average
annual precipitation was 30% less
than the historic norm (316 mm).
These data indicate the importance
of irrigating based on real-time ETo
rather than historical ETo to avoid
drought stress.
Results and discussion
Overall, 88% of all trees survived the
first three years and survival rates
for trees in reference sites (95%) were
greater than for trees in parks (84%)
(Table 1). Inland trees had a higher
survival rate (92%) than Coastal trees
(83%), despite exposure to greater
evaporative stress. The unusually
high rate of mortality for trees in the
Coastal Vista Del Mar Park (54%) was
largely responsible for this result.
The high loss rate at Vista Del Mar is
attributed to the cumulative effects of
strong winds, salt spray, clouds and
cool weather. Symptoms of stress
included lack of foliage on the wind-
ward side of tree crowns and desicca-
tion from salt spray (Fig. 2).
Trees in Coastal Westchester Park
had 83% survivorship, while rates
ranged from 88-92% in the other 6
parks. The trend of higher survival
81 14
A rboristWESTERN
Winter 2019
Figure 2. The native Catalina cherry (Prunus ilicifolia ssp. Lyonia) is one of the few species surviving in Vista Del Mar Park. Loss of windward crown structure and foliar desiccation from salt spray are shown in these figures.
Table 1. Survival rates (%) for park and reference sites in the Southern California Coastal and In- land climate zones.
Park Sites Reference Sites All Sites
Survival (2016-2018)
Coast Inland All Coast Inland All Coast Inland All
Acacia aneuraa (Mulga) 100 88 94 100 100 100 100 92 96
Cedrela fissilisb (Brazilian Cedarwood) 63 100 75 75
Celtis reticulataa (Netleaf Hackberry) 100 100 100 100 100 100 100 Chilopsis linearis ‘Bubba’c (Desert Willow) 88 100 92 92 Corymbia papuanaa (Ghost Gum) 63 100 75 100 67 100 83
Dalbergia sissooa (Rosewood) 75 100 100 100 83 100 92
Hesperocyparis forbesiia (Tecate Cypress) 38 75 56 50 75 63 42 75 78 Mariosousa willardianaa (Palo Blanco) 63 100 81 75 100 88 67 100 83 Parkinsonia x ‘Desert Museum’c (Palo Verde) 100 100 100 100 100 100 Pistacia ‘Red Push’a (Red Push Pistache) 75 100 88 100 100 100 83 100 92 Prososis glandulosa x Mavericka (Mesquite) 100 100 100 100 100 100 100 100 100 Prunus ilicifola spp. Lyoniib (Catalina Cherry) 88 88 100 100 92 92 Quercus fusiformisa (Escarpment Live Oak) 88 38 63 100 100 100 92 58 75 Quercus tomentellaa (Island Oak) 88 88 88 100 100 100 92 92 92 78 90 84 92 98 95 83 92 88
a. in both Coastal and Inland sites
b. Coastal sites only
c. Inland sites only
rates in the Inland rather than Coast-
al climate zones was found for the
Reference sites (98% Riverside, 92%
Irvine).
Survival rates for the 10 species
that were planted at both Coastal
and Inland sites were lowest for es-
carpment live oak (75%, Quercus fusi-
formis) and Tecate cypress (78%, Hes-
perocyparis forbesii). The original oaks
were dug bare root in Arizona and
transported to holding sites in Los
Angeles. Some trees died due to dry-
ing of roots during handling. Boxed
replacement oak trees had higher ini-
tial survival rates. A root rot disease
(Phytophthora spp.) was identified as
the primary cause of death for two
Tecate cypress trees that exhibited
twig die-back at the Irvine reference
site. Although this species is per-
forming poorly in Coastal parks and
82 Arborist
15 WESTERN
Winter 2019
aesthetics, and insect and disease
damage. Pruning requirement is an
important consideration when se-
lecting trees. Species that require
extensive pruning to develop strong
structure are more costly to maintain
than those that require less prun-
ing. Species assessed as having a
high pruning requirement exhibited
poor structural characteristics (e.g.,
codominant stems, branches with
included bark, and branches with a
large diameter relative to the trunk).
As these trees continue to develop,
growth rates and structural char-
acteristics likely will change, and
pruning requirements may increase
or decline accordingly.
In the Coastal sites, top perform-
ers included escarpment live oak
(Quercus fusiformis) and Red Push
pistache (Pistacia ‘Red Push`) ( Fig.
4). These species had high survival
rates, strong structure and modest
pruning requirements. Species with
high survival rates but requiring
more frequent pruning were rose-
wood (Dalbergia sissoo), Maverick
mesquite (Prosopis glandulosa ‘Mav-
erick`), mulga (Acacia anuera), and
netleaf hackberry ( Celtis reticulata).
Figure 3. Brazilian cedarwood (left) and mulga (right) at Westchester Park near the Pacific coast. Note that the Brazilian cedarwood’s crown is relatively sparse during the early years. This mulga requires pruning for structure and form.
Figure 4. Red Push pistache (left) and escarpment live oak (right) in Jim Gilliam Park. Both these species have high survival rates and are developing good crown structures without extensive pruning.
the reference site, the other Califor-
nia natives, Catalina cherry ( Prunus
ilicifolia ssp. Lyonii) and island oak
(Quercus tomentella) had 92% surviv-
al rates. In the Inland climate zone,
escarpment live oak (58% survival)
and Tecate cypress (75%) had the
lowest survival rates.
Ghost gum (Corymbia papuana)
and palo blanco (Mariosousa willardi-
ana) had 83% survival rates, with all
losses in Coastal parks and reference
sites. Both species are native to arid
environments (Australia and Sonora,
Mexico) and are not very tolerant of
cool, moist, coastal conditions.
Of the 4 species planted in a single
climate zone, Brazilian cedarwood
(Cedrela fissilis) fared the worst with
75% survival. The 2 trees planted at
Vista Del Mar died, as did 1 at Jim
Gilliam Park. The lack of branch-
ing structure and weak wood make
this species especially susceptible to
vandalism and mechanical damage
during the early years (Fig. 3).
Performance
Subjective performance ratings were
performed for each species after vis-
its to each park and reference site.
Scoring incorporated observations
of survival, pruning requirements,
83 16
A rboristWESTERN
Winter 2019
Both Catalina cherry (Prunus ilicifolia
ssp. Lyonia) and island oak ( Quercus
tomentella) appear well adapted to
coastal conditions but remain rela-
tively small and shrub-like (Fig. 5).
Observation over a longer period of
time is necessary to determine their
suitability as attractive small trees.
Brazilian cedarwood has not per-
formed well, appearing to require
more intensive care than others
during the establishment period.
Tecate cypress, ghost gum and palo
blanco need hotter, drier conditions
to thrive.
In the Inland sites, Desert wil-
low (Chilopsis linearis ‘Bubba`), ghost
gum, and Red Push pistache outper-
formed the other species (Figs. 6,
7, Table 1). They exhibited the best
survival rates across a wide range
of conditions and required the least
pruning. Rosewood, Maverick mes-
quite, netleaf hackberry and Desert
Museum palo verde ( Parkinsonia x
Figure 6. Red Push pistache (above left) and ghost gum (above right) at Hansen Dam Park. Both these species are top performers in the Inland sites.
Figure 7. A rosewood (below left) is thriving at Valley Plaza Park, where irrigation and pruning are minimal and the soil is sandy. Desert willow (below right) had high survival rates and flowers throughout the summer. This desert willow at Woodley Park requires some initial pruning.
Figure 5. Catalina cherry at Bogda-
novich Park has a high survival rate
but is slow to establish a sound crown
structure.
84 Arborist
17 WESTERN
Winter 2019
Figure 8. Attributes of (from top to
bottom) the palo blanco, Maverick mes-
quite, and Desert Museum palo verde in
Woodley Park. The crown structure of
the palo blanco is very wispy. The mes-
quite and palo verde are developing full
crowns, but they will require regular
pruning for structure and form. The palo
verde’s yellow flowers are spectacular
during late spring.
‘Desert Museum`) had high survival
rates but substantial maintenance
needs (Fig. 8). These species require
more pruning and palo verde is sub-
ject to failure from blow-over when
subjected to over-irrigation. These
initial results parallel those reported
for palo verde, mesquite, pistache,
desert willow, and texas ebony in
the Tucson area in which aesthet-
ics, canopy density, tree quality, and
overall health remained high even at
20% ETo (Schuch, 2018). While mul-
ga, palo blanco, and island oak show
promise to date, more time is needed
to gauge their adaptability, pest vul-
nerability and pruning requirements
as they mature. Tecate cypress and
escarpment live oak had the low-
est survival rates but merit further
observation over a longer period of
time before final conclusions regard-
ing their suitability can be made.
A brief description of each species
can be found on the Climate Ready
Trees website at: http://climaterea-
dytrees.ucdavis.edu/meet-the-
trees/.
Conclusions
Although it is premature to make
definitive statements about tree per -
formance through maturity, several
trends merit continued observation.
Certain species that are native to hot,
arid conditions are not surviving and
performing well in Coastal sites (e.g.,
palo blanco, Tecate cypress, ghost
gum). Other desert species are toler-
ant of many Coastal conditions but
require frequent pruning to main-
tain sound structure (i.e., Maverick
mesquite, mulga, netleaf hackberry).
Few of these potential climate-ready
species are surviving in the extreme
Coastal conditions found at Vista
Del Mar Park.
Survival rates were higher in
the Inland parks where growing
conditions more closely matched
the arid environments from which
many of these species originated.
Overwatering may be the greatest
source of stress and responsible for
crown growth that outpaces root
growth for certain species (i.e., Des-
ert Museum palo verde, Maverick
mesquite). Trees like the Red Push
pistache, rosewood, ghost gum and
desert willow seem to tolerate the
under- and over-irrigated soils in the
Inland parks. Further observation is
needed to determine the suitability
and long-term performance of island
oak, escarpment live oak, Catalina
cherry, and palo blanco. Continued
monitoring of growth, survival, and
performance will help determine if
emerging trends continue or change
as each species matures.
McPherson, E. Gregory and
Erika Teach
USDA Forest Service, Pacific
Southwest Research Station
Davis, CA 95618
[email protected]
[email protected]
Berry, Alison, M.
Department of Plant Sciences
University of California
Davis, CA
[email protected]
van Doorn, Natalie S.
USDA Forest Service, Pacific
Southwest Research Station
Albany, CA 94710
[email protected]
Downer, James
University of California Coopera-
tive Extension
Ventura County, CA
[email protected]
Hartin, Janet
University of California Coopera-
tive Extension
San Bernardino, Los Angeles &
Riverside Counties, CA
[email protected]
Haver, Darren
University of California Coopera-
tive Extension
South Coast Research & Extension
Center
Irvine, CA
[email protected]
85 18
A rboristWESTERN
Winter 2019
References
Glick, P ., Stein, B. A., & Edelson, N. A. (2011). Scanning the conservation horizon: a guide to climate change vulner- ability assessment. Washington, D.C.: National Wildlife Federation.
Hartin, J.S.; Fujino, D.W.; Oki, L.R.; Reid, S.K.; Ingels, C.E. (2018). Water requirements of landscape plants studies conducted by the University of California researchers. HortTechnology. 28:4, 422-426. August.
McPherson, E. G., & Berry, A. M. (2015). Climate-ready urban trees for Central Valley cities. Western Arborist, 41(1), 58-62.
McPherson, E.G.; Berry, A.M.; van Doorn, N.S.; Downer, J.; Hartin, J.; Haver, D.; Teach, E. 2017. Climate-ready tree study – update for Central Valley communities. Western Arborist. 43: 44-51.
McPherson, E. G., Berry, A. M., & van Doorn, N. (2018). Performance testing to identify climate-ready trees. Urban Forestry & Urban Greening. 29: 28-39. doi.org/10.1016/j.ufug.2017.09.003.
Van der Veken, S., Hermy, M., Vellend, M., Knapen, A., & Verheyen, K. (2008). Garden plants get a head start on cli- mate change. Frontiers in Ecology, 6(4), 212-216.
Roloff, A., Korn, S., & Gillner, S. (2009). The climate-species-matrix to select tree species for urban habitats consider- ing climate change. Urban Forestry & Urban Greening, 8(4), 295-308.
Schuch, U. (2018). Tree irrigation requirements in the semiarid southwestern United States. HortTechnology. 28:4, 427- 430. August.
Yang, J. (2009). Assessing the impact of climate change on urban tree species selection: a case study in Philadelphia.
Journal of Forestry, 107(7), 364-372
86 Recommended Modifications to Pasadena Street Tree Policy By
Ashwin Sivakumar
for Pasadena Audubon
Attachment E.
87 Introduction
As an organization based and operating primarily in a large urban area, the Pasadena Audubon Society has advocated for more bird-friendly and generally ecosystem-friendly urban design and management practices. One area that Pasadena Audubon has prioritized since 2019 is advocacy for ecologically sound management of the urban forest in Pasadena and other municipalities in the San Gabriel Valley. This initiative has been concentrated in two specific areas: tree trimming practices, and tree planting practices 1.
After several meetings with city officials in Pasadena, Advocacy Committee members determined that ecologically optimal and wildlife-friendly species selection for tree planting would be of added benefit to the city and its residents. Consequently, Pasadena Audubon has been working with city officials in Pasadena and Arcadia on prioritizing certain tree species, especially native trees, that are either broadly ecologically useful or specifically useful for birds.
In 2019, Pasadena Audubon became aware that Dr. Eric Wood, assistant professor of ecology at Cal State LA, had conducted research concerning patterns of feeding behavior by resident and migratory birds on various street tree species in the Los Angeles urban forest. The presence of these data highlights the possibility of the prioritization of street trees based on ecological benefits.
This document was prepared in fulfillment of a project commissioned by the Pasadena Audubon Society. The goal of this project was to create a published document that:
1. Recommends the planting of certain tree species that are both ecologically beneficial, especially to birds, and can be planted in a typical street setting in the San Gabriel Valley;
2. Justifies the selection of these species using a) data both from Dr. Eric Wood’s study and from other literature, as well as by b) explaining the practical importance of supporting birds;
3. Recommends against the planting of certain species that Dr. Wood’s study found to offer relatively little ecological value to native birds;
4. Ensures that the socioeconomic aspects of current planting practices are given appropriate attention and are incorporated into recommendations;
5. Identifies a) the most important regulatory obstacles to the planting of the aforementioned species, as well as b) specific strategies the City of Pasadena can undertake to rectify these issues;
1 Donohue, Kara, et al. 2018. “BMPs and Handouts: Tree Care for Birds.”Tree Care for Birds and Other Wildlife,, treecareforbirds.com/bmps-and-handouts/.
88 6. Provides the lists of species, the information justifying it, and the list of proposed strategies in a manner comprehensible to a general audience.
This document will begin by enumerating the importance of supporting birds through the urban forest (Goal 2b). It will then provide a list of recommended bird-friendly street trees and explicate the selection process for these trees (Goal 1), and provide detailed justifications for each individual tree species selected (Goal 2a). Then, the document will identify the two largest regulatory obstacles to the planting of these species (Goal 4a). Finally, it will explain in detail two strategies that the City of Pasadena can pursue to increase the prevalence of these species in the urban forest - the first involving a modification of the Procedure to Amend the MSTP , and the second involving community engagement (Goal 4b). This second strategy may also greatly assist in resolving the socioeconomic inequality in the distribution of bird-friendly trees within the urban forest (Goal 3). At the end of the document, a simplified, user-friendly flyer that is pivotal to both of the proposed strategies will be provided in an appendix (Goal 5).
The importance of bird-friendly urban forest management Street trees planted in a municipality’s right of way are valuable public resources that play a critical role in the livability of the community2. The benefits they offer are numerous. The most immediate effect that is easily noticeable by everyone is that they improve the aesthetic qualities of the neighborhoods3. A street lined with large, stately, leafy trees is universally preferred to one devoid of vegetation. However, the benefit of street trees extends far beyond aesthetics. Among numerous ecological and societal services offered by a thriving urban forest4, planting trees is an excellent way to mitigate the urban heat island (UHI) effect5 that is especially of concern with increasing global temperatures. As cities expand and human populations become more urban, the need to ensure that urban spaces are not ecologically sterile has become more urgent. Trees provide an excellent way to attract wildlife, especially birds, into the 5 Yan, C., Guo, Q., Li, H., Li, L., & Qiu, G. Y . 2020. Quantifying the cooling effect of urban vegetation by mobile traverse method: A local-scale urban heat island study in a subtropical megacity.Building and Environment, 169, 106541. doi:10.1016/j.buildenv.2019.106541
4 Dudek. 2018. First step: Los Angeles urban forest management plan. Prepared for City Plants by Dudek. Pasadena, California, USA.
3 Southworth, M. 2005. Designing the walkable city. Journal of Urban Planning and Development 131:246–257. 2 McPherson, E. G., N. van Doorn, and J. de Goede. 2016. Structure, function and value of street trees in California, USA. Urban Forestry and Urban Greening 17:104–115.
89 urban environment6 7 8. With bird populations under extreme pressure in North America 9 10, it is important to ensure that our ever-expanding cities are as much a haven to birds using urban environments as forests and wetlands.
Most countries have undergone rapid urbanization in the last one and half centuries, and the United States is no exception. People living in cities lead busy lives. An unfortunate consequence of living in a concrete jungle is that we are increasingly disconnected from wildlife and nature in urban landscapes with every passing generation. One cosmopolitan component of wildlife, birds, provides numerous essential ecological services 11. Perhaps their most important role is to provide an immediate and relatable connection to the broader environment12. Birds are colorful, vocal, and charismatic. Further, birds are a critical bellwether to urgent environmental issues like pollution, habitat loss, and climate change. Therefore, we must try to sculpt our cities to be as wildlife-friendly as possible.
Cities like Los Angeles saw rapid expansion in the early 20th century. With abundant water diverted from the eastern Sierra Nevada and with a mild climate, early planners of Los Angeles targeted a highly diverse urban forest with trees and plants imported from around the world13.
As a result, most of the trees currently adorning cities in the Los Angeles metropolitan area are 13 Reisner, M. 1987. Cadillac desert: the American West and its disappearing water. Penguin Books, New York, New York, USA.
12 Belaire, J. A., Westphal, L. M., Whelan, C. J., & Minor, E. S. (2015). Urban residents' perceptions of birds in the neighborhood: Biodiversity, cultural ecosystem services, and disservices.The Condor, 117(2), 192-202. doi:10.1650/condor-14-128.1
11 Whelan, C. J., Wenny, D. G., and Marquis, R. J. 2008. Ecosystem services provided by birds.Annals of the New York academy of sciences, 1134(1), 25-60.
10 Rosenberg, K. V., Dokter, A. M., Blancher, P . J., Sauer, J. R., Smith, A. C., Smith, P . A., . . . Marra, P . P . (2019). Decline of the North American avifauna. Science, 366(6461), 120-124. doi:10.1126/science.aaw1313 9 Soykan, C. U., Sauer, J., Schuetz, J. G. LeBaron, G. S., Dale, K., and Langham, G. M. 2016. Population trends for North American winter birds based on hierarchical models. Ecosphere 7( 5):e01351. 10.1002/ecs2.1351 8 Gray, E. R., and Y . van Heezik. 2016. Exotic trees can sustain native birds in urban woodlands. 943 Urban Ecosystems 19:315–329.
7 Shackleton, C. 2016. Do indigenous street trees promote more biodiversity than alien ones? Evidence using mistletoes and birds in South Africa. Forests 7:1–10.
6 Bhullar, S., and J. Majer. 2000. Arthropods on street trees: a food resource for wildlife. Pacific Conservation Biology 6:171–173.
90 non-native in origin 14 15 16. Selected for their beauty, urban trees are aesthetically pleasing, but likely provide few resources to wildlife. When considering the street tree population of Greater Los Angeles, 83% of street tree species were underutilized by birds given their prevalence in the urban forest, and these trees were overwhelmingly non-native in origin 17(Wood and Esaian, 2020). The inescapable conclusion is that if bird and wildlife conservation is a goal for cities, trees within an urban forest should either be native or carefully chosen non-natives that can support native wildlife 18.
Selection process for bird-friendly street trees
The project began with the creation of a list of tree species useful for birds. This list was formed by concatenating lists of a) native trees to the Los Angeles Basin, b) near-native tree species found elsewhere in Southern California, c) native/near-native x non-native hybrid varieties, and d) non-native species that are known to be overutilized by bird species relative to their prevalence in the Los Angeles urban forest .
The species were then filtered according to the following criteria:
- Demonstrated suitability as a Southern California street tree: In order to meet this criterion, the tree species must be present in either the City of Los Angeles Approved Street Tree List or the book Street Trees Recommended For Southern California, 3rd Edition published by Street Tree Seminar, Inc.
- Non-invasiveness: the tree species must not be present in the Cal-IPC inventory. - Medium to low allergenicity: the tree species must have a TreePeople Allergy Potential rating of less than 7.
- Medium to low root damage: the tree species must have a TreePeople root damage potential rating of M or L.
18 ibid.
17 Wood, E. M, and S. Esaian. 2020. The importance of street trees to urban avifauna. Ecological Applications. doi:10.1002/eap.2149
16 Wood, E. M, and S. Esaian. 2020. The importance of street trees to urban avifauna. Ecological Applications. doi:10.1002/eap.2149
15 Avolio, M. L., D. E. Pataki, T. W. Gillespie, G. D. Jenerette, H. R. McCarthy, S. Pincetl, and L. Weller Clarke. 2015.
Tree diversity in southern California’s urban forest: the interacting roles of social and environmental variables.
Frontiers in Ecology and Evolution 3:1–15.
14 Clarke, L. W., D. G. Jenerette, A. Davila, G. D. Jenerette, and A. Davila. 2013. The luxury of 904 vegetation and the legacy of tree biodiversity in Los Angeles, CA. Landscape and Urban 905 Planning 116:48–59. 91 - Additional undesirable characteristics: The tree species must not be denoted by TreePeople as possessing any of the following characteristics:
- Too big for most parkways
- Hard to establish
- Not readily available
- Not suited to LA climate zones
- Weak branches
- High water use
- Major pests/diseases
- Highly flammable
The list was then divided into the following tiers:
- Tier 1: Species that met all of the criteria
- Tier 2: Species that did not meet all of the criteria, but were nevertheless judged as being either a) a truly exceptional wildlife tree or b) a species that has been well-documented as a successful street tree in the Los Angeles Basin.
Species that did not fall within either of these tiers were discarded.
Coast live oak and Western Sycamore
The single most important tree for birds, and wildlife more broadly, in Southern California is without doubt the Coast live oak (Quercus agrifolia). It is an extraordinary host species for native beneficial insects, including over a hundred species of lepidopterans, and dozens of bird species. However, in addition to posing some root damage issues and having high allergenicity, Coast live oak is the most abundant tree in the Pasadena urban forest, with just over 10% of trees belonging to this species. Thus, any further planting of Coast live oak would contravene the 10-20 rule (the guideline that no more than 10% of a city’s urban forest should belong to a single species, and no more than 20% from a single genus). We strongly urge the City to pursue avenues to protect and plant Coast live oak if possible, but in this document, we focus on other species for whom further planting would not violate the 10-20 rule.
Western sycamore (Platanus racemosa) is another widely planted native, bird-friendly tree species in Southern California. However, sycamore poses a number of problems in a street tree setting. It is highly allergenic and is very susceptible to a wide array of common pests, including polyphagous shothole borer, powdery mildew, anthracnose, and Fusarium. For this reason, this species did not pass the criteria for either the Tier 1 or Tier 2 lists. 92 Chinese Elm and Carrotwood
Chinese Elm (Ulmus parvifolia) and Carrotwood (Cupaniopsis anacardioides) are two non-native street tree species that are heavily overutilized by native bird species relative to their prevalence in the Los Angeles urban forest, and were therefore considered for inclusion on the Recommended Species List. However, both species have a history of invasiveness in many regions of North America - Chinese Elm is of particular concern, having been nominated as a Cal-IPC invasive species. For this reason, both species were left off the list out of an abundance of caution.
Recommended Species List
Tier 1 species and justifications
Six species met all of the selection criteria and were placed in Tier 1. These species are all tried-and-tested street trees in Southern California with relatively few issues and immense value for native wildlife. Thus, these six species are the most recommended bird-friendly street trees for Pasadena. A table of their characteristics (using information from the CalPoly SelecTree Database, Calscape, and the Chino Basin Water Conservation District Inland Valley Valley Garden Planner), as well as justification for each species, is provided below. Unless otherwise noted, all details provided on bird use of individual species originate either from Calscape or from personal communication with members of Pasadena Audubon and the California Native Plant Society.
Deodar
Cedar
(Cedrus
deodara)
Desert
Museum
Palo Verde
(Parkinsoni
a x “Desert
Museum”)
Chitalpa (x
Chitalpa
tashkentens
is)
Santa Cruz
Island
Ironwood
(Lyonotham
nus
floribundus
asplenifoliu
s)
Torrey Pine
(Pinus
torreyana)
California
Fan Palm
(Washingto
nia filifera)
Height (ft) 40-80 15-30 20-35 25-60 25-60 50-70
Width (ft) 20-50 20-30 20-30 12-40 15-50 10-20
93 Spacing (ft) 35-40 25-30 25-30 30-35 35-40 30
Possible
forms
Spreading,
Weeping
Round,
Spreading,
Vase
Round,
Spreading,
Vase
Round,
Conical,
Columnar
Round,
Spreading,
Columnar,
Pyramidal
Columnar
Growth rate Fast Fast Fast Fast Fast Moderate
Dormancy Evergreen Evergreen Winter
deciduous
Evergreen Evergreen Evergreen
Fragrance Pleasant Pleasant Pleasant None Pleasant None Flower
color
N/A Yellow Pink/Lavend
er
Cream/Whit
e
N/A White/Yello
w
Flowering
season
N/A Spring/sum
mer
Spring/sum
mer/fall
Spring/sum
mer
N/A Winter/spri
ng
Sun Full sun,
part shade
Full sun Full sun,
Part shade
Full sun Full sun Full sun,
Part shade
Moisture Any Low, Very
low
Any Very low Very low Any
Irrigation Max
3x/month
Max
1x/week
once
established
Max
2x/month
once
established
Max
1x/month
once
established
Max
1x/month
once
established
Max
1x/month
once
established
Cold
tolerance
To 10 F To 15 F To -15 F To 30 F To -5 F To 14 F
Drainage Fast Fast Fast Fast,
Medium
Fast,
Medium
Fast
Soil pH Any 5.5-8.5 Any 5.0-8.0 Any 6.1-9.2
Sunset
climate
zone
18-24 18-24 3-24 19-24 18-24 11-24
Root
damage
potential
Medium Low Low Medium Medium Medium
Allergy
potential
1 (female)
to 5 (male)
6 6 4 4 Mild
94 (1-10)
Biogenic
emissions
High Medium None Low Medium Medium
Fire
resistance
Unfavorable Favorable Favorable Favorable Unfavorable Favorable Longevity
(years)
150+ 40-150 40-150 50-150 150+ 50-150
Deodar Cedar (Cedrus deodara)
Deodar Cedar surely ranks among our most outstanding street trees in every possible category, from aesthetics to compatibility with urban environments to usefulness for birds. Native to the mountains of South Asia, it is perfectly at home, and has become a common street tree, across ping branches and elegant needles ranging from green to blue. Importantly, it has no significant pest problems or invasiveness potential, and generally has low allergy and root damage potential, making it ideal for most street environments with sufficient space.
Special considerations:
- Deodar cedar is not fire resistant, so it may be best to avoid planting in the immediate vicinity of the wildland-urban interface.
- Lower branches must be removed in order to ensure compatibility with most street environments.
Bird use:
Wood and Esaian (2020) found that within the Los Angeles urban forest, deodar cedar is disproportionately favored by several migratory species, including Ruby-crowned Kinglet (Regulus calendula) and Townsend’s Warbler (Setophaga townsendi). Given these species are insectivorous, this indicates that the beneficial insects hosted by deodar cedar are of great use to a number of native bird species, although it remains to be determined which specific insect species these are. Additionally, larger species such as Band-tailed Pigeon (Patagioenas fasciata) use deodar cedar extensively for roosting.
Desert Museum palo verde (Parkinsonia x “Desert Museum”) Desert Museum palo verde is a spectacular hybrid among three palo verde species (Parkinsonia aculeata, P . microphyllum, and P . florida), two of which (P . microphyllum and P . florida) are native to southeastern California. Unlike other palo verde species, it is thornless, which, in addition to its sturdy limbs and relatively contained form, makes it a safe and suitable street tree. Desert Museum palo verde is one of the longest blooming palo verde varieties, and is 95 covered in relatively large yellow flowers throughout spring and summer. In addition to being utility-friendly, palo verde offers filtered shade, making it a good choice for residential areas with plenty of sun.
Special considerations:
- Palo verde is the most allergenic of the Tier 1 species. That said, it releases a relatively small volume of pollen compared to other common street trees and is rarely a major culprit in allergy problems.
- Most photosynthesis occurs on younger branches, so pruning should be performed judiciously and only during winter except in emergency circumstances.
Bird use: Palo verde trees are magnets for a diverse array of birds, due to their utility for supporting beneficial insects and their nectariferous flowers alike. Palo verde is pollinated by numerous beneficial insects, including beetles, flies, and bees, and is known to be a host for at least two Los Angeles Basin lepidopterans (Melipotis acontioidesand Forsebia cinis). In addition to supporting insectivorous birds, palo verde flowers are also directly used by hummingbirds.
Finally, the dense branches of the tree provide excellent nesting habitat for smaller bird species, especially hummingbirds.
Chitalpa (Chitalpa x tashkentensis)
Chitalpa is a hybrid between desert willow (Chilopsis linearis), an attractive Southern California native that is suboptimal as a street tree; and a member of the genus Catalpa, usually Northern Catalpa (Catalpa speciosa). Chitalpa exhibits beautiful pink or lavender flowers during its extremely long flowering season (from late spring to early fall). While it is winter deciduous, it nonetheless remains attractive throughout dormancy thanks its pale bark. Due to its contained habit, Chitalpa serves as an excellent tree for tight spaces, including under power lines.
Special considerations:
- Chitalpa blooms most profusely in full sun, but grows tallest in part shade. - Chitalpa branches are sturdy enough for normal street use, but care should be taken not to apply excessive stress that may break the branches.
- Chitalpa naturally grows as a multi-trunk tree. If pruned when young, it can grow well as a single-trunked tree, but should be staked in order to grow straight.
Bird use: Chitalpa offers many of the same ecosystem functions as the native desert willow. It attracts numerous beneficial native insects that naturally use desert willow, and is particularly well-known as an excellent butterfly tree. Like any tree that supports native lepidopterans, 96 Chitalpa is thus highly useful to insectivorous birds. Additionally, Chitalpa provides a long-lasting and reliable source of nectar for hummingbirds.
Santa Cruz Island Ironwood (Lyonothamnus floribundus asplenifolius) Santa Cruz Island ironwood is a subspecies of island ironwood, an evolutionarily unique tree endemic to the Channel Islands. Santa Cruz Ironwood has been extensively used in horticultural applications on the California mainland. Ironwood grows to be a tall, robust specimen while rarely spreading extensively. Its shiny and verdant foliage is evergreen, and its fern-like leaves are intriguing in appearance. During the spring and the summer, ironwood also boasts spectacular clusters of creamy white flowers. The most attractive feature of this species, however, is its flaky, peeling reddish bark.
Special considerations
- Due to its columnar habit, ironwood generally performs best where there is plenty of available overhead space.
- Preferably, ironwood should be planted in areas with some coastal influence, so we recommend this species for Downtown Pasadena and southwestern areas of the city. - Soil drainage should be good.
Bird use: Ironwood’s massive flower clusters are extremely attractive to a wide array of native pollinator species, especially bees, which in turn support insectivorous birds. Additionally, ironwood trees are known to provide good cover and nesting habitat for a number of native bird species, including orange-crowned warblers (Vermivora celata)19 and scrub-jays (Aphelocoma sp.)20 Ironwood bark is also used by scrub-jays (Aphelocomasp.) for caching seeds, and by a number of other species as nesting material.
Torrey Pine (Pinus torreyana)
Torrey pine is coastal Southern California’s signature native coniferous species. Widespread across the region during the Pleistocene, this endangered tree’s wild distribution is now restricted to a few groves in coastal San Diego County and on the Channel Islands. Luckily, thanks to its excellent performance in horticultural applications, Torrey pines are being restored across Southern California. Torrey pine grows to great size, taking on a number of forms ranging from spreading to columnar, but nevertheless a manageable and attractive ornamental street 20 Collins, P . W. 2009. Historic and Prehistoric Record for the Occurrence of Island Scrub-Jays (Aphelocoma insularis) on the Northern Channel Islands, Santa Barbara County, California. Santa Barbara Museum of Natural History Technical Reports – No. 5.
19 Gilbert, W. M., M. K. Sogge, and C. van Riper (2020). Orange-crowned Warbler (Leiothlypis celata), version 1.0. In Birds of the World (P . G. Rodewald, Editor). Cornell Lab of Ornithology, Ithaca, NY , USA. https://doi.org/10.2173/bow.orcwar.01
97 tree. If managed well, Torrey pines can also reach great size in a relatively short amount of time.
Special considerations:
- Due to their size, Torrey pines should be given plenty of space, and should never be planted under any overhead structures.
- Pine cone litter may be a concern, but is generally easy to clear.
Bird use:
Over millions of years, Torrey pine has evolved symbiotically with California avifauna, remaining one of Southern California’s best wildlife trees today despite its rarity. Serving as a host for numerous native insects, including some twenty lepidopterans, Torrey pine is perhaps best documented as a host for the pine white butterfly (Neophasia menapia). In addition to hosting larval lepidopterans, Torrey pines provide pine nuts, which are directly useful to a number of native seed-eating birds, especially California Scrub Jay (Aphelocoma californica).
California Fan Palm (Washingtonia filifera)
California fan palm, while less optimal than other trees in this document (see Special Considerations), is nevertheless a perfectly manageable and highly attractive species that serves as an excellent native replacement for the extremely culturally important yet highly invasive Mexican fan palm (Washingtonia robusta), one of Pasadena’s most widespread street trees.
Much like other cultivated palm trees, California fan palm grows tall in a columnar fashion, showcasing an impressive and attractive evergreen crest in addition to a shaggy petticoat of dead leaves.
Special considerations:
- California fan palm is known to be susceptible to the South American palm weevil (Rhynchophorus palmarum), and should be surveyed regularly for pest damage. - Fan palms may drop fronds or fruit.
- Fan palms are too tall for homeowners to maintain, so the city must take on upkeep costs.
- Fan palms only provide limited shade.
Bird use:
The flowers of the California fan palm attract about 20 species of native arthropod, including bees, beetles, and lepidopterans. In addition to supporting healthy insect populations, California fan palm has developed such a close relationship with the hooded oriole (Icterus cucullatus), which nests on the underside of palm fronds, that the bird is sometimes nicknamed the “palm-leaf oriole.” Finally, the fruit is useful for several native frugivorous birds, including orioles.
98 Tier 2 species and justifications
Five species met the vast majority of the selection criteria and were judged to be exceptional either aesthetically, culturally, or ecologically, but were deficient in a few areas. These species were placed in Tier 2. They can serve as excellent bird-friendly street trees in certain situations within Pasadena, but care must be taken to avoid planting them in situations where they would not perform well. These species, along with their characteristics and justification for their selection, is provided below. the world in Southern California. It is a straight and very tall tree, sporting a unique pyramidal shape with long wee
California
Laurel
(Umbellula
ria
californica
)
Engelmann
Oak
(Quercus
engelmanni)
Southern
Live Oak
Ray Hartman
Ceanothus
Western
Redbud
(Cercis
occidentalis)
Height
(ft)
25-75 30-65 40-80 12-30 10-25
Width
(ft)
20-75 80-120 60-100 5-20 10-25
Spacin
g (ft)
35-40 35-40 35-40 12-20 25-30
Possibl
e forms
Round,
Spreading
Round,
Spreading
Round,
Spreading
Round Round,
Spreading
Growth
rate
Moderate Moderate Moderate Fast Moderate
Dorma
ncy
Evergreen Evergreen or
summer
deciduous
Evergreen Evergreen Winter deciduous
Fragran
ce
Pleasance None None Slight Slight
Flower
color
White/Yello
w/Cream/G
reen
Cream/Gree
n
Tan Blue Pink
Floweri
ng
Spring Spring Spring Spring Winter/spring
99 season
Sun Full sun,
part shade
Full sun, part
shade
Full sun, part
shade
Full sun, part
shade
Full sun, Part
shade
Moistur
e
Low Low Any Low Low
Irrigatio
n
Max
3x/month
Max
2x/month
Max 1x/week Max 1x/week Max 1x/week
once established
Cold
toleran
ce
To 10 F To 30 F To 10 F To 15 F To 20 F
Drainag
e
Medium,
Slow
Any Any
(preferably
Fast)
Fast Any
Soil pH 5.0-8.0 6.0-8.0 Any 5.0-8.0 5.0-8.0
Sunset
climate
zone
18-24 18-21 18-24 18-24 18-24
Root
damag
e
potenti
al
Medium Medium Medium Low Low
Allergy
potenti
al
(1-10)
8 8 9 6 5
Biogeni
c
emissio
ns
High High High Moderate Low
Fire
resista
nce
Conflicting Favorable Favorable Favorable Favorable
Longev
ity
(years)
150+ 150+ 150+ 25-30 40-150
100
Western Redbud (Cercis occidentalis)
General description: https://plants.usda.gov/plantguide/pdf/cs_ceor9.pdf Western redbud is a small deciduous tree native to foothill and montane riparian areas in the U.S. Southwest. Since 1886, redbud has been used in managed landscapes in California, and is renowned by horticulturalists as one of California’s most spectacular native trees. During the winter and spring, this tree explodes into bloom, coated by pinkish flowers. Redbud is relatively small, contained, and round in form, making it utility-friendly and excellent for tight spaces.
Special considerations:
- Redbud requires relatively cool winters in order to exit dormancy. Thus, planting should be focused at higher elevation localities away from coastal influence. For this reason and due to its resistance to fire, we especially recommend redbud for foothill neighborhoods.
- Redbud can tolerate regular to heavy pruning, which should be performed after leaf drop in the fall, winter, or early spring.
- Redbud can suffer leaf scorching during the summer due to reflected heat from pavement, so this species should preferably be used where a lawn or larger trees are present.
Bird use: Western redbud is a highly well-rounded bird tree, useful to insect-eating, seed-eating, and nectar-eating birds alike. It is pollinated by bumblebees (Bombus sp.) and orchard mason bees (Osmia lignaria), but is also highly attractive to other native insects. For instance, redbud is thought to host up to 11 species of native lepidopterans. These insects, especially the larval lepidopterans, serve as important food for resident and migratory bird species. Additionally, redbud seed pods are known to be useful to certain native birds such as goldfinches (Spinus sp.). Finally, hummingbirds (Trochilidae sp.) feed extensively on nectar in redbud flowers.
California Laurel (Umbellularia californica)
California Laurel, or California Bay Laurel, is a medium-to-large, robust, and verdant tree native to wooded groves throughout coastal California, including in the foothills around Pasadena.
Named for the similar Bay Laurel (Laurus nobilis) from Europe, it is actually highly evolutionarily distinct, being the only member of the laurel family native to California and one of the few native to temperate North America. It is a highly versatile species that can be used in a variety of horticultural settings, and due to its variable size and shape, it can serve as an excellent species for small and large parkway spaces alike. Wherever it is planted, its thick green foliage 101
will provide ample shade as well as a strong but very pleasant fragrance.
Special considerations:
- California Laurel is a fairly allergenic species, so homeowners should be consulted prior to planting, and streets around schools should be avoided. - While root damage potential is lower than for many common street trees, California Laurel roots may be more invasive than other species in this document. - California Laurel has a tendency to basal sprout, so pruning should be regular. - California Laurel is a well-known host for Phytophthora ramorum, the pathogen responsible for Sudden Oak Death (SOD). While SOD generally does not seriously impact laurel health, it can easily spread to nearby oaks, where its impact is more grave. Thus, laurel should be planted away from oaks if possible. If this is not possible, the area should be regularly monitored, and if SOD is detected within 1,000 feet of the oak, the oak should be treated preventatively even if all surrounding laurels are healthy.
Bird use:
California Laurel is a species of extremely high ecological importance in wooded environments throughout coastal California, especially for birds. The tree’s inconspicuous green berries, as well as the nuts within, are consumed by a wide array of birds, and its dense foliage provides cover for a broad range of birds of various sizes.
Engelmann Oak (Quercus engelmanni)
Obviously, no list of recommended street trees for Pasadena would be complete without Engelmann Oak, a tree so intricately tied to the city’s natural history that it is alternatively known as the “Pasadena Oak.” This endangered tree is endemic to a narrow strip of upland habitat in coastal Southern California, including the San Gabriel Valley where it has been all but extirpated in the wild, but has become quite popular in horticultural applications, for good reason. It embodies all the characteristics generally sought for in oaks, including a broad, spreading, gnarled structure and verdant foliage that provides excellent shade.
Special considerations:
- Engelmann Oak is a fairly allergenic species, so homeowners should be consulted prior to planting, and streets around schools should be avoided. - Engelmann Oak has the broadest canopy of any oak species, and thus should only be planted where there is ample horizontal space.
- Engelmann Oak is a known host for polyphagous shothole borer (Euwallacia sp. ), so it should be checked regularly for signs of infestation.
- Acorn litter may be an issue in certain circumstances.
Bird use:
In the wild, Engelmann Oak undoubtedly ranks among the most useful Southern California 102
native plants for wildlife, especially birds. The beneficial insects thought to be hosted by Engelmann Oak include a staggering 112 species of lepidopteran, demonstrating this tree’s incredible potential to produce food for insectivorous birds. Additionally, the tree’s acorns are consumed by a vast array of native birds, including Acorn Woodpecker (Melanerpes formicivorus), Oak Titmouse (Baeolophus inornatus), Bushtit (Psaltriparus minimus) and California Scrub-Jay. Given its size and complex structure, Engelmann Oak is also used for cover and nesting by a wide range of species.
Southern Live Oak (Quercus virginiana)
The Southern Live Oak is one of the United States’ most emblematic trees, the enormous, aged, gnarled specimen adorning the park-like landscape of the American South. While Southern California lies well outside of its typical native habitat, this tree performs excellently here too, and it has become a well-established component of the Pasadena urban forest. Southern Live Oaks growing as street trees in Southern California do not reach the same size as they do further east, but nevertheless contribute lush foliage, majestic structure, and excellent shade to the urban environment.
Special considerations:
- Southern Live Oak is known to be susceptible to Xylella fastidiosa, a bacterium that causes leaf scorch. Trees should be surveyed regularly for infection. - Southern Live Oak is a fairly allergenic species, so homeowners should be consulted prior to planting, and streets around schools should be avoided. - Acorn litter may be an issue in certain circumstances.
Bird use:
Though it is non-native, it was found 21 that within the Los Angeles urban forest, southern live oak is disproportionately favored by numerous resident and migratory bird species, especially Ruby-crowned Kinglet, Townsend’s Warbler, and Bushtit. While the exact utility of this species to native wildlife is not yet understood, it likely serves as an ecological proxy for native oak species, hosting many of the same beneficial insects as well as providing acorns for birds. ‘Ray Hartman’ Ceanothus (Ceanothus x ‘Ray Hartman’)
Ceanothus has gained incredible popularity among horticulturalists as one of the most aesthetically pleasing and versatile genera of California native plants, but the ‘Ray Hartman’ cultivar - a hybrid between C. arboreus and C. griseus - is unique among its congeners, as it functions less as a large shrub and more as a small tree. ‘Ray Hartman’ combines the many features of ceanothus shrubs, such as easy cultivation, low water requirement, very fast growth, and luscious blossoms, with a size that allows it to serve as an excellent street tree for tight 21 Wood, E. M, and S. Esaian. 2020. The importance of street trees to urban avifauna. Ecological Applications. doi:10.1002/eap.2149
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spaces such as beneath utility features.
Special considerations:
- It is crucial to remember that biologically, ‘Ray Hartman’ shares far more in common with Ceanothus shrubs than the other trees described in this brochure. Thus, the maximum lifespan of this cultivar is comparatively somewhat short (under 50 years). ‘Ray Hartman’ ceanothus should therefore never be used in situations where the tree is desired to survive into the far future.
- Supplemental summer watering should be completely avoided, as it can shorten the plant’s lifespan.
- Deer are very attracted to ‘Ray Hartman’ ceanothus, so planting in the wildland-urban interface should be done carefully.
Bird use:
Ceanothus is a genus of paramount ecological importance in the chaparral of Southern California. This ecological value translates to excellent wildlife utility in ceanothus cultivars, including ‘Ray Hartman.’ While the beneficial insects hosted this particular cultivar have yet to be comprehensively documented, ceanothus is known to be enormously valuable for native bees, and nearly 100 species of lepidopteran are thought to be hosted by either C. arboreus or C. griseus, the two contributing species to the hybrid - testifying to the immense potential of this plant to support insectivorous birds. Additionally, hummingbirds feed directly on the nectar in ceanothus flowers, and a number of birds, including goldfinches and bushtits, feed on the plant’s seeds.
Species to Avoid
Wood and Esaian (2020) found that the vast majority of non-native street tree species currently utilized in the Los Angeles urban forest are relatively underutilized by birds - that is, their ecological value to native birds is below average. In a city where this average is already quite low, these trees may be considered to be of almost zero value to native birds. Many of these species are also common in the Pasadena urban forest, and a partial list of them is provided below.
Southern magnolia (Magnolia grandiflora)
Camphor tree (Cinnamomum camphora)
Italian stone pine (Pinus pinea)
Common crape myrtle (Lagerstroemia indica)
London plane tree (Platanus x acerifolia)
Indian laurel fig (Ficus microcarpa)
Carob (Ceratonia siliqua)
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Canary Island date palm (Phoenix canariensis)
Issues with Pasadena urban forest management
Native trees comprise only a small portion of Pasadena’s urban forest. Only just under 10% of City of Pasadena trees (mostly street trees) are native or near-native, with the quasi-totality of these being Coast Live Oaks. Non-native species found to be bird-friendly by Wood and Esaian (2020) also contribute to the makeup of the urban forest on a minor scale. The most bird-friendly non-native species in the Los Angeles urban forest, namely Chinese Elm, Carrotwood, and Southern Live Oak, only account for about 6%, 2%, and 1% of City of Pasadena trees respectively. The vast majority of street trees in Pasadena are thus not especially useful to most native birds.
The Problem:
There are three significant issues that prevent more bird-friendly species, especially native trees, from being planted.
The first two are major features of the regulatory infrastructure surrounding the Pasadena Urban Forest.
1. The 10-20 rule. Urban forests across the United States in the 20th century were devastated by massive infestations and subsequent tree die-offs, such as the famous chestnut blight (Cryphonectria parasitica) that virtually wiped out all American chestnut trees (Castanea dentata) across the continent. These infestations were severely exacerbated by a lack of diversity within urban forests, which allowed pests to spread in an unabated fashion. In order to prevent the recurrence of similar events, many cities, including Pasadena, have adopted the 10-20 rule, a principle that no individual species should comprise more than 10% of the urban forest, and no genus should comprise more than 20%.
While sensible, this rule essentially prohibits the planting of any additional coast live oaks in Pasadena, as that species already accounts for around 10% of city trees - a major obstacle to efforts to increase the ecological value of the urban forest, as coast live oak is possibly the single most important plant species for Southern California wildlife, especially birds.
2. Procedure to process amendments to the Master Street Tree Plan (MSTP). In order to ensure aesthetic uniformity, the Pasadena MSTP dictates which tree species may be planted on each block of each street in the city, with a maximum of five species authorized for each street. However, most streets have only been assigned one or two 105
tree species. The only way for the list of species authorized for any individual street to be changed (for example, for an additional species to be authorized for a street) is for a resident to petition the Department of Public Works to amend the MSTP .
What follows is an incredibly byzantine process, which begins, upon the resident submitting the petition to amend the MSTP , with the city providing the street coordinator with a flowchart to the amendment process and information on the incredibly detailed Cal Poly SelecTree guide. The street coordinator is tasked with meeting with the petitioner and also getting the concurrence of at least 50% of residents on the street and finally working with Public Works to submit a letter detailing the specific amendment proposal to decide which species to add to the street.
A major problem with this process is the overwhelming size and detail of the Cal Poly guide, with the vast majority of the species in the guide being non-native, as a result of which the residents are very unlikely to select a bird-friendly species if it is not their primary intention. Moreover, the undue burden placed on the street coordinator to sort through the thousands of species in this database as well as to share the database with other residents makes the entire process so onerous as to strongly dissuade residents from submitting requests to modify the MSTP , or the street coordinators from appropriately researching the wildlife-friendliness of the suggested trees.
The third problem is that of a general lack of knowledge on the part of the homeowner who, in the current process, is tasked with the responsibility of initiating the process to modify the MSTP .
3. The homeowner is generally unaware of not just the process to modify the MSTP to increase the diversity of street trees in his or her neighborhood, but the very existence of a problem relating to the deleterious impact of non-native trees on urban wildlife! These three problems have led to the current situation where lack of information combined with a complicated process to amend the MSTP make it incredibly difficult to increase the ecological value of the urban forest.
The Solution:
One of the primary goals of this report is to provide solutions to these three problems.
To solve Problems 1 and partially solve Problem 2, the following strategy is proposed:
A. The City of Pasadena should include the flyer in Appendix A as one of the resources provided to the street tree coordinator in the Procedure to Process Amendments to the Master Street Tree Plan.
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The overall MSTP amendment process, while laborious, can be left relatively intact if the city prefers it that way, although reducing the level of complexity would be desirable.
However, the most important thing is to prioritize the list of bird-friendly trees that has been generated as part of this effort over the Cal Poly Selectree guide. The bird-friendly tree list has been thoroughly researched and is presented as part of the work in two formats: an easily digestible tabular format, or in the form of an illustrated flyer (Appendix A). The bird-friendly tree list does two important things: a) It highlights the importance of these trees for urban wildlife, and b) makes the task of finding suitable trees much easier than having to pore through the voluminous Cal Poly tree guide.
It is recommended that the bird-friendly tree guide in both the tabular and flyer format should reside on either the City of Pasadena website, or on the Pasadena Audubon website and be appropriately linked to in the MSTP modification flowchart. The homeowner or the street coordinator will then have the correct starting list of bird-friendly trees to choose from. Since the list that has been generated as part of this study is shorter, more focused, and in a more user-friendly format, it is expected to greatly simplify the process for the homeowner or street coordinator.
In order to solve Problem 3 and partially solve Problem 2, the following strategy is proposed:
B. The City of Pasadena should begin a community-oriented campaign to encourage Pasadena residents to submit amendments to modify the MSTP for their streets, focusing this campaign on lower-income neighborhoods of the city.
We must address a lack of knowledge about both the City policy on street trees and the importance of careful species selection. Since the process of initiating the effort to amend the MSTP falls on the resident, it is imperative that they are educated on not just the importance of bird-friendly trees, but on the process of amending the MSTP . To address this, it is recommended that the City initiate a community-oriented campaign to impress on the residents of the city the need for diverse native flora to allow native fauna to thrive.
The simplification of the tree selection process, in addition to the grassroots campaign will have another hugely beneficial effect. One of the great problems of the lack of native biodiversity in the urban forest is that this is highly influenced by socio-economics. Wood and Esaian (2020) find that within Los Angeles, affluent neighborhoods are more biodiverse, largely due to the fact that the prevalence of bird-friendly and native trees is positively correlated with neighborhood affluence. This pattern holds in Pasadena - the urban forest is much more biodiverse, and hence 107
much more friendly to urban wildlife, in affluent areas of the city than in socioeconomically depressed ones. The proposed solutions will go a long way in democratizing not just the knowledge and information needed by the residents to make good decisions regarding the trees on their streets, but to simplify the amendment process and make it more accessible to them. 108
Appendix A
Downloadable flyer:
https://drive.google.com/file/d/1ZNp4Vf6r-5kPiFQo3IZ-18lstTHmu8q7/view 109
NATIVE TREES for URBAN GARDENS
Theodore Payne Foundation for Wild Flowers & Native Plants Garden-making often starts with a tree – a little sapling that will, in time, provide color, fragrance, shade and places for birds to nest and twitter. Much to the gardener’s delight, California’s flora offers a wealth of trees. Though each is unique in character, all provide seasonal interest and habitat for native wildlife.
Selecting the right species is crucial, as trees are the long-lived heart of a landscape and determine the nature of a garden. Start by assessing your personal needs, garden conditions and available space.
Choose wisely: Big fast-growing trees need plenty of shoulder and head room. Smaller species will fit in tight spaces; some will even grow in containers. To learn more, visit our California Native Plant Database at theodorepayne.org.
LARGE TREES
Calocedrus decurrens (incense cedar) – 70-90’ H x 10-15’ W – A handsome evergreen conifer with flattened sprays of fragrant foliage and furrowed, shredding orange-brown bark. Moderate growth rate; pyramidal shape. Tolerates poor soils and smog; resistant to heat, drought and oak root fungus.
Platanus racemosa (Western sycamore) – 30-80' H x 30' W – This riparian beauty appreciates year- round irrigation and grows quickly with great leaning trunks, spreading crown of humongous leaves, and flaking silver and brown bark. Tolerates heat and wind; resistant to oak root fungus. Winter deciduous, picturesque and gorgeous in all seasons!
Quercus agrifolia (coast live oak) – 25-75’ H x 30-60’ W – This regional icon grows at a moderate pace large, dome-shaped crown of evergreen holly-like foliage. Heat-loving and very drought tolerant, once established.
Q. engelmannii (Engelmann, mesa or Pasadena oak) – 40’ H x 40’ W – A natural for valley and foothills residents that grows slowly with rounded canopy of long, rounded, dull blue-green foliage and furrowed gray brown bark. Tolerates heat and drought. Old leaves are shed as new leaves emerge in spring.
Q. lobata (valley oak) – 30-90’ H x 30+’ W – This mighty species, said to be America’s largest oak, sports pale gray bark and elegantly lobed dark green foliage. Prefers hot inland conditions and deep rich soil; tolerates drought and alkalinity; resistant to oak root fungus. Winter deciduous.
Pinus ponderosa (ponderosa pine) – 40-70’H X 20-40’ W – This tall narrow species grows at a moderate pace with glossy green needles and orange-brown bark. Long-lived and adaptable to heat, moderate drought and all but desert conditions.
P. torreyana (Torrey pine) – 35-50’ H x 20-40’ W – Our nation’s rarest pine hails from restricted areas of coastal San Diego and a small section of Santa Rosa Island. In cultivation, fast upright growth with a broad open crown of long blue-green needles. Adapts to most soils and climates; resistant to heat, smog, drought and oak root fungus.
Umbellularia californica (California bay) – 75’ H x 60 W – In cultivation, this species grows slowly at first, then more quickly. Dense evergreen foliage and smooth gray bark. Very aromatic leaves may be substituted for sweet bay laurel in cooking. Thrives with good drainage and regular irrigation but tolerates heat and drought.
(over)
Attachment F.
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SMALL TO MEDIUM-SIZE TREES
Brahea armata (Mexican blue palm) – 25-40’ H x 8’+ wide – A Baja California native with chalky silver- blue leaves and arching masses of creamy white flowers. Slow-growing. Tolerates heat and wind; thrives in coastal, inland and desert locations. Excellent container plant.
Parkinsonia floridum (blue palo verde) – 20-30’ H x 20’W – This popular desert species offers abundant, fragrant, yellow spring flowers, plus blue-green leaflets, thorny limbs and blue-green bark. Single or multi-trunked trees grow quickly. Good drainage preferred; requires periodic deep watering; drought deciduous.
Ceanothus arboreus (felt-leaf or Catalina ceanothus) – 15-25’ H x 12’ W – A fast-growing Channel Islands native with beautiful evergreen foliage (dull green on top, white on the underside) and late winter/early spring clusters of small, honey-scented pale blue to white flowers. Tolerates clay soil; drought tolerant to moderate irrigation.
Cercis occidentalis (Western redbud) – 15’ H x 10’ W – This charmer is usually grown as a multi-trunk specimen. Brilliant pink, pea-like, early spring blossoms on leafless gray branches are followed by heart- shaped leaves and red-purple seedpods. Sun- and drought-tolerant, but best with light shade and monthly irrigation when grown inland. Accepts most soils; resistant to oak root fungus. Flowers most heavily where winter temperatures drop below 28˚F.
Chilopsis linearis (desert willow) – 15-20’ W x 10’ W – A hummingbird magnet that sports graceful, arching branches of willow-like foliage, with summer displays of trumpet-shaped flowers in shades of white, pink, rose or purple with darker markings. Moderate growth rate; prune when young for good form. Winter deciduous; accepts sun, heat and drought.
Fraxinus dipetala (California or flowering ash) – 15’ H x 10’ W – Diminutive and too rarely planted! Slow to moderate growth with multiple trunks, gray bark, dark green compound leaves and showy clusters of small, fragrant white flowers that appear before leaves in April. Yellow, coppery or purplish fall color precedes winter leaf drop. Drought-tolerant, once established.
Juglans californica var. californica (Southern California black walnut) – 30’ H x 10-15’ W – This local species, now rare in nature, tolerates heat, smog and drought, while providing nesting, cover, nectar and food for wildlife. Slow growing. Winter deciduous; warm yellow fall color. Great on slopes; tolerates heat, smog and drought; resistant to oak root fungus.
Lyonothamnus floribundus ssp. aspleniifolius (Santa Cruz Island ironwood) – 30’+ H x 15-20 W – This Channel Island native bears large clusters of tiny white flowers in summer, aging to orange-rust. Narrow evergreen leaves are glossy, deep green and lobed along the edges. Reddish gray bark peels in thin shreds. Fast growth and upright habit. Tolerates wind, salt spray and drought. Beautiful when planted in groves.
Pinus monophylla (single-leaf piñon pine) – 25-30’ H x 25-30’ W – Forms a rounded crown of short, stiff pale gray-green needles and red-brown cones with delicious, nutritious pine nuts. Naturally suited to hot dry conditions. Very slow grower; a fine choice for container culture.
Quercus douglasii (blue oak) – 15-30 H x 15-30 W – A lovely oak for relatively small spaces! Pale gray bark. Lobed leaves are blue-green with pale undersides and take on pastel pink or yellow hues before dropping for the winter. Accepts extreme heat and seasonal drought. ©
2014 Theodore Payne Foundation
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General Amendment
Master
Street
PASADENA
Tree Plan
Produced by the
Department of Public Works
Adopted by City Council
(insert date)
Attachment G.
112
General Amendment
Master
Street
PASADENA
Tree Plan
Produced by the
Department of Public Works
Adopted by City Council
(insert date)
113
114
AKNOWLEDGEMENTS
City Council
Victor Gordo, Mayor
Jess Rivas, Vice Mayor, District 5
Tyron Hampton, District 1
Rick Cole, District 2
Justin Jones, District 3
Gene Masuda, District 4
Steve Madison, District 6
Jason Lyon, District 7
City Commissions and
Committees
Municipal Services Committee
Design Commission
Urban Forestry Advisory Committee
Department of Public Works
Greg de Vinck, P.E., Director
Garrett Crawford, Street Maintenance Administrator
Kenneth Graham, Forestry Superintendent
Michael King, Forestry Program Coordinator
Office of the City Manager
Miguel Márquez, City Manager
Nicholas Rodriguez , Assistant City Manager
Brenda Harvey-Williams, Assistant City Manager
Matthew Hawkesworth, Assistant City Manager
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EXECUTIVE SUMMARY
& VISION
The City of Pasadena has a rich history of planting and preserving trees. Trees provide a wealth of environmental, economic and placemaking value for the City.
The City’s urban forest comprises of over 100 different species of hardwood and palm species.
Tree canopy coverage in Los Angeles County – conducted by TreePeople Los Angeles and Loyola Marymount University’s Center for Urban Resilience – noted that Pasadena possesses an average of 30% canopy coverage throughout the City, whereas, Los Angeles County on average possesses an average 20% canopy coverage.
The Master Street Tree Plan guides what tree species are planted in public spaces throughout the City. It’s common practice for urban forestry plans to be a collaborative process blending current industry research, community input, and
local historical, context. It is not the intention to do away with the City’s current designated tree species list, rather, provide staff flexibility to use alternative tree species for planting under certain conditions.
Emerging research in urban forestry management and tree care science has led to a longstanding conversation between professionals and the community most notably asking the question – what trees should we be planting? This Master
Street Tree Plan General Amendment will adopt guiding principles that sets the criteria for an Alternative Tree Species List, as well as provide the decision- making process on when it may be appropriate to use these tree species.
build upon Pasadena’s rich urban forestry
history, that will guide tree species selection that promotes a resilient and sustainable urban forest for future generations.
Vision:
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HISTORY AND
RELATIONSHIP WITH
OTHER CITY PLANS
As of 2025, the City has been recognized by
the Arbor Day Foundation as a Tree City
USA designee for 35 years. But the City’s
horticultural and arboricultural history
stems from long before.
Early history of Pasadena painted a
landscape of oak trees littered among
orchards of fruit trees that were the driving
economic engine of the day. Estate
gardens began to emerge around the turn
of the century,
and prominent residents
like Jeanne Carr and Arthur Heinemen
began to shape the City’s horticultural and
arboricultural history. Jeanne Carr planted
and cultivated over 90 different tree
species from around the world - some
1. Coast Live Oak Tree at Orange Grove Blvd and Pasadena Blvd. plants cultivated from seeds collected by
renown environmental preservationist John
Muir. Carr planted some of the City’s
earliest Monterrey Cypress and California
Pepper trees along her estate, Carmelita,
which is now where the Norton Simon
Museum is located . Arthur Heineman was
an architect who championed the benefits
trees provide to communities leading to
some of the earliest tree planting programs
led by the City and more neighborhood
tree-lined streets .
2 3
In 1940, the City’s Park Department adopted
the ‘Official Street Tree List’, which called for
specific tree species to be planted on
streets throughout the City.
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As parts of Los Angeles County were
annexed into Pasadena and post-World
War II subdivisions expanded, older public
streets were rebuilt and new ones
constructed, adding more street trees into
the City’s urban forest. By 1976, the City
adopted the Master Street Tree Plan
,
aiming to bring greater consistency to the
selection and placement of street trees.
Around the same time, emerging
arboricultural research began shedding
light on how different species performed in
urban environments. Publications like
Recommended Street Trees for Southern
California by Street Tree Seminar Inc.
guided professionals in moving away from
commonly planted species that were later
found to have significant drawbacks - such
as vulnerability to pests or weak wood
prone to failure.
The City inventoried all
existing public trees and hired J. Harold
Mitchell Company to assess the tree
species the City was planting and begin
making recommendations to improve the
urban forest.
The Master Street Tree Plan has been
amended over time based on staff’s
observations of poor performing tree
species, as well as resident-initiated
requests to replace existing trees with
preferred alternatives. Tree species, such
as Carob (Ceratonia siliqua ), Carrotwood
(Cupaniopsis anarcardioides), Silver Maple
(Acer saccarinum), Shamel Ash (Fraxinus
uhdei),
Tulip tree (Liriodendron tulipifera )
etc., are no longer planted in the City due
to susceptibility to tree failure, likelihood of
causing significant hardscape damage, or
other factors found to be of poor
performance as a street tree.
The current iteration of the Master Street
Tree Plan is available on the City’s Public
Works’ webpage, as a GIS map feature.
Users can look up a specific address
throughout the City, and open a pop up
window that provides the current
designated tree species and year the
designation was last amended.
Tree planting supports every element of
the City’s General Plan, and is a cost
effective tool to improve the environment
and livability of the City. In 2018, the City
launched
Our Pasadena, an effort to
update each of the City’s eight community
Specific Plans. Through public outreach,
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Master Street Tree Plan Web Tool allows users to search for current tree species designations and provides year the respective street was last amended.
Planning and Community Development
staff found strong community interest in
the City’s urban forest. And while the
ultimate decision for tree species selection
resides with the Public Works Department,
the Updated Specific Plans provides
recommended tree species for future
consideration within the Appendix section
of each Specific Plan.
Within the tree care
industry, research related to climate
resilient tree species, and tree species that
better support ecological biodiversity
continue to
emerge.
This Master Street Plan General
Amendment is intended to adopt guiding
principles and a flexible policy framework
that would allow for different tree species
to be planted under certain conditions.
All of this is to say: tree
species selection in a
changing,
urban environment
is an important, and at times,
a complex endeavor.
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Front Yard
Sidewalk
Street
Right tree, right place and right reason is a principle in urban forestry that emphasizes selecting the appropriate tree species - given it’s anticipated growth -for a specific location and with a purpose that aligns with current best management practices. Will the tree’s canopy be in conflict with the adjacent building? Will the tree’s height be in conflict with utility lines? Is the tree species recommended to support climate resilience, biodiversity, and drought tolerance?
While maintenance such as trimming can help mitigate these conflicts, excessive maintenance is costly and can compromise the health of the tree in the longrun. Right tree, right place, right reason can help extend the life of urban trees.
GUIDING PRINCIPLES
1. Right Tree, Right Place, Right Reason
1. F ront yard space, common in single
family areas can accommodate larger,
canopy trees.
2. A reas of Old Town Pasadena, where
buildings are zero setback (building
comes up to property line/public right
of way), canopy space is restricted.
Smaller or more upright trees should
be considered.
3. V egetation management around
utility lines is regulated by the
California Public Utilities Commission,
and administered by Pasadena Water &
Power. In order to preserve larger
trees around utility lines, directional
pruning (v pruning) is sometimes
performed, which can draw concern
from the community. Therefore,
smaller trees is generally
recommended for planting around
utility lines.
GENERAL CONSIDERA TIONS
Building Facade
Sidewalk
Directional Pruning
1 2
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Public safety is paramount to the work in urban forestry. However, trees can at times pose complex challenges within a built environment that cannot always be mitigated from hazards. Fire resilience is one such challenge . While all poorly maintained plants and vegetation can be fire-hazardous, certain tree species such as: Eucalyptus, Pine, Cypress and Palm posses characteristics (e.g., shedding bark; resinous foliage; and leaf litter production) that can be more prone to flammability under the right conditions .
4 5
The California Department of Forestry and Fire Prevention (CAL FIRE) recently updated its fire hazard and severity zones map for the State. Much of the City west of the Arroyo, and the Upper Hastings Ranch neighborhood fall within defined ‘Very High’ fire hazard zones. The events of the 2025 Eaton Canyon Fire have understandably affected the entire community. And while weighing the ecological benefits of different tree species relative to their fire risk can be complex, out of an abundance of caution the City will amend planting any currently designated tree species that possess characteristics more prone to flammability with an alternative tree species.
2. Public Safety
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30 20
10 Species
Genus
F amily
Not all trees are created equal. The ecological services trees can provide - such as reducing heat island effect and sequestering carbon - vary by species. And conversely, the tolerances to environmental stressors - such resilience to climate change and drought tolerance - can also vary by tree species 6 3. Tree Species Diversity
A widely accepted guideline in
urban forestry management is
the 30-20-10 rule, This rule
states that no more than 30% of
the trees in a city’s forest should
come from the same plant
family, no more than 20% from
the same genus, and no more
than 10% from the same
species. Planting a diverse
group of different tree species
helps spread the various
ecological services each tree
can provide, and help
safeguard the urban forest from
an unexpected spread of a pest
or other biotic disorder . 7
If the 30-20-10 rule sets the thresholds for
the overall composition of the urban forest,
the following criteria should be considered
to guide species selection: tree species
that have shown resilience to climate
change; tree species that promote
biodiversity;
native tree species; and tree
species that contribute to placemaking in
Pasadena. The abovementioned criteria is
evolving and can generate spirited
debates in the tree care industry, so it’s
important for staff to stay informed of
changes that can be flexibility
implemented at a later time.
122
Climate Resilience
In 2015, the University of California, Davis (UC Davis) launched a long-term study on how different, underutilized tree species would perform against a changing climate. Horticultural advisors went through a rigorous process of nominating, scoring and ultimately selecting 12 different tree species to plant and observe in conditions illustrative of California’s Central Valley, Inland Empire region, and California’s southern coastal region. The trees received the same irrigation, pruning and other maintenance activities, and were observed for establishment rates and overall performance over a multi-year period . The results of this study are published by UC Davis’ ‘Climate Ready’ trees program. 8,9
Native Tree Species
The ecological value native tree species provide relative to non native species is unclear as research remains to be divided on this matter . However, there is historical, cultural and strong public support to continue planting native tree species. Native tree species that staff have found to perform well in Pasadena, and have been regularly available from local plant nurseries have been incorporated in the Alternative Tree Species List.
11 Biodiversity
Trees provide an invaluable habitat for the food web ecosystems, specifically, between insects and birds. Cal State LA is leading local research on this dynamic, and has gathered and published data collected on bird foraging observations among street trees throughout multiple residential neighborhoods in the greater Los Angeles area . The Pasadena Audubon Society has provided a list of recommended tree species that better support biodiversity, incorporating research from Cal State LA and others experts in urban ecology. 10 Placemaking
In 2018, the City’s Planning and Community Development Department began the process of updating the City’s eight different Specific Plans. Extensive public outreach was conducted in order to produce these plans. One of the sections in the Plans that generated strong public interest was tree species selection in the public realm.
Each adopted Plan provided an appendix of recommended tree species that added to Placemaking for the relative neighborhood of the corresponding Plan.
The following criteria and research was used to create the Alternative Tree Species List. 123
Understanding what trees currently make up the City’s urban forest will allow for conformance to the 10-20-30 rule, and allow for appropriate species selection in the Alternative Tree Species List.
The Quercus (Oak) genus, and Q. agrifolia (Coast Live Oak) species are hovering close to the 20% and 10% thresholds, respectively. However, staff has observed Q. ilex (Holly Oak) species beginning to perform poorly in the City.
Swapping Q. ilex with other Quercus species trees in the Alternative Tree Species List will help keep the genus below the 20% threshold.
Maintaining an accurate and up-to-date tree inventory can be challenging and resource-intensive. However, tree inventories store vital information including, maintenance history, which can help the City defend itself against tree-related claims and lawsuits, as well as specific tree attributes that can help visualize better planning for the City.
The City’s Information Technology Department and
Geography Information Systems (GIS) section are a talented and invaluable resource in managing and leveraging the City’s Tree data. Best management practices recommend a comprehensive inventory update or quality check every 10 years, and as such, the Public Works Department should plan to allocate the appropriate resources accordingly.
CURRENT TREE INVENTORY
Map of tree canopy concentration exported from City’s tree inventory data.
Rendering of building and street tree spaces using ArcGIS software.
124
Top 5 Genus Diversity
Genus
Quercus Washingtonia Magnolia Cinnamomun Ulmus
0 5
10 15
20 Top 5 Species Diversity
Species
Q. agrifolia M. grandiflora C. cam phora W. robusta Q. ilex 0 2
4 6
8 10
19.2%
9.2%
9.2%
9.0%
5.8%
9.8%
9.1%
9.0%
8.0%
6.2%
125
C ommon Name
ALTERNATIVE TREE SPECIES LIST
M ulga
D esert Willow
C hitalpa
R ay Hartman Ceanothus
R ed Push Pistache
M averick Mesquite
S anta Cruz Ironwood
N oble Laurel
M arina Madrone
N ew Zealand Christmas Tree
W ater Gum
G host Gum
I ndian Rosewood
I sland Oak
D eodar Cedar
S outhern Live Oak
F ern Pine
T ipu Tree
B otanical Name
A cacia aneura
C hilopsis linearis
C hitalpa x tashkentensis
C eanothus ‘Ray Hartman’
P istacia ‘Red Push’
P rosposis glandulosa ‘Maverick’
L yonothamnus floribundus
L aurus nobilis
A rbutus ‘Marina’
M etrosideros excelsa
T ristaniopsis laurina
C orymbia papuana
D albergia sisso
Q uercus tomentella
C edrus deodara
Q uercus virginiana
A frocarpus falcatus
T ipuana Tipu
General Size
S
S
S
M
M
M
M
M
M
L
L
L
L
L
L
S
M
L
The Alternative Tree Species List was aggregated from the criteria and research referenced previously in Section 3.
126
Evergreen
Decidious
E
D
E
D
E
E
E
E
E
E
D
E
E
E
E
D
E
E
Climate
Resilient
Supports
Biodiversity
Drought
Friendly
California
Native
Performs
Well
127
Right Tree
Right Place
AMENDMENT TO IMPLEMENTATION
1. Given the rich history of the Master Street Tree Plan, current designated tree species should continue to be used unless the location or species meets one of the following criteria below.
If staff use a species from the Alternative Tree Species List, they should select a species that looks close to the existing tree species in order to minimize inconsistency in the landscaping palette.
Public Safety
2. If the planting work is within a designated fire hazard zone as defined by the latest CalFire map, and the
current designated tree species has characteristics
that are more prone to flammability (
Eucalyptus, Pine,
Cypress and Palm species), staff should utilize a
species from the Alternative Tree Species List.
Tree Species
Diversity
3. If the planting work will use an existing tree
species that is of concern due to the 10-20-30
rule (Q. agrifolia, M. grandiflora, C. camphora
),
staff should utilize a species from the
Alternative Tree Species List.
Placemaking
4. If the planting work is within a Specific
Plan area, and the current designated
species is concerned to be poor
performing, staff may utilize the tree
species recommended in the Appendix
section of each respective Specific Plan.
128
129
1. Masters, N. (2017, August 29). Why did oak trees once grow in the middle of Pasadena intersections?. PBS SoCal. Retrieved from https://www.pbssocal.org/shows/lost-la/why-did-oak-trees-once-grow-in-the- middle-of-pasadena-intersections
2. Sheid, A. (2013). The trees in California’s cityscapes. Journal of the California Garden & Landscape History Society, 16(2), 4–9.
3. Scheid, A. (2024, June 21). The legacy (and challenges) of Pasadena’s trees. City of Pasadena, Council District 6. Retrieved from https://www.cityofpasadena.net/district6/featured-stories/the-legacy-and- challenges-of-pasadenas-trees/ City of Pasadena
4. National Park Service. (n.d.). Fire management newsletter: Eucalyptus: A complex challenge [PDF]. Point Reyes National Seashore, Golden Gate National Recreation Area, U.S. Department of the Interior. Retrieved
August 28, 2025, from
https://www.nps.gov/pore/learn/nature/upload/firemanagement_fireeducation_newsletter_eucalyptus. pdf
5. Varner, J. M., Shearman, T. M., Kane, J. M., Banwell, E. M., Jules, E. S., & Stambaugh, M. C. (2022).
Understanding flammability and bark thickness in the genus Pinu s using a phylogenetic approach.
Scientific Reports, 12(1), Article 7384. https://doi.org/10.1038/s41598-022-11451-x
6. Love, N. L. R., Nguyen, V., Pawlak, C., Ritter, M. K., Ventura, J., Doremus, J., & Fricker, G. A. (2022). Diversity and structure in California’s urban forest: What over six million d ata points tell us about one of the world’s
largest urban forests. Urban Forestry & Urban Greening, 74, Article 127679. https://doi.org/10.1016/j.ufug.2022.127679
7.Santamour, F. S., Jr. (2003, August 11). Trees for urban planting: Diversity, uniformity, and common sense.
The Overstory (#126). Retrieved from https://www.agroforestry.org/the-overstory/144-overstory-126-trees- for-urban-planting-diversity-uniformity-and-common-sense
8. McPherson, E. G., van Doorn, N., & de Goede, J. (2016). Stru cture, function and value of street trees in
California, USA. Urban Forestry & Urban Greening, 17, 104–115. https://doi.org/10.1016/j.ufug.2016.03.013 Cite This For Me+4Cite Fast+4Cite This For Me+4
9. McPherson, E. G., Berry, A. M., van Doorn, N. S., Downer, J., Hartin, J., Haver, D., & Teach, E. (2017). Climate- ready tree study – Update for Central Valley communities (8 pp.) [PDF]. U.S. Department of Agriculture, Pacific Southwest Research Station. Retrieved from
https://www.fs.usda.gov/psw/publications/mcpherson/psw_2017_mcpherson006.pdf
10. Wood, E. M., & Esaian, S. (2020). The importance of street trees to urban avifauna. Ecological Applications, 30(7), e02149. https://doi.org/10.1002/eap.2149
11. Pawlak, C. C., Love, N. L. R., Yost, J. M., Fricker, G. A., & Ritter, M. K. (2023). California’s native trees and their use in the urban forest. Urban Forestry & Urban Greening, 89
REFERENCES
130
Adopted by City Council
(insert date)
131
ITEM #3
132
October 28, 2025
To: Municipal Services Committee
From: Dav
id M. Reyes
General Manager
Subjec
t: Prepaid Renewable Energy Transaction for Cost Savings This memorandum is for information only. The Municipal Services Committee may, however, take action relating to this item as it deems appropriate following consideration and discussion of the matter.
BACKGROUND:
In Apri
l of 2024, the Southern California Public Power Agency (“SCPPA”) and the City of Anaheim Public Utilities Department, entered into a Clean Energy Purchase Contract and related agreements to realize cost savings of nearly $3.5 million per year on existing energy purchased power agreements (“PPAs”). Anaheim was the first publicly owned utility to execute such a transaction, and over a dozen community choice aggregators (CCA) have used this mechanism to realize savings.
The succe
ss of the transaction highlighted a potential opportunity to other SCPAA members and soon after staff began working on a new project with SCPPA to realize these savings for Pasadena’s customers. Pasadena Water and Power (“PWP”) currently has prepaid energy contracts for natural gas using this same tool, however, this was a proof of concept for the application for a neighboring utility for use for clean energy PPAs.
Analysi
s:
Worki
ng with SCPPA and PWP legal and financial advisors, PWP intends to request authorization from City Council to enter into Clean Energy Purchase Contracts for Prepaid Renewable Energy and the associated agreements to realize cost savings for customers in 2025.
For the C
ity to achieve the anticipated savings, SCPPA proposes to issue prepay energy bonds as the tax-exempt financing mechanism, which is allowed by the Internal Revenue Service (“IRS”). In this prepaid structure, Pasadena will assign renewable energy power to 133
SCPPA and will agree to buy back the produced energy through a Clean Energy Purchase Contract. SCPPA will make a prepayment through the bond proceeds for most of the purchase price enabling SCPPA to sell the produced energy back to PWP at per Megawatt- hour prices discounted from the prices in the existing agreements. The long-term nature of the agreement provides budget certainty, which is essential for long-range planning and rate stability.
While s
ome agreement provisions are still under development, and the exact savings are not yet determined, PWP intends to include five existing PPAs (Antelope Big Sky Ranch Solar, Big Sky Summer Solar, Columbia 2 Solar, Kingbird Solar, CalWind) in the prepay structure. The PPAs identified are ideal due to their relatively high costs and long remaining contract terms. The savings terms depend on the difference between the municipal and corporate capital borrowing rates, and for the past several years, it has been favorable and at times more than 10%.
It is
important to point out that risk mitigation terms have been fully vetted and incorporated into the prepay energy transaction to protect PWP’s customers. If an adverse event, such as a counterparty’s bankruptcy, affects the tax-exempt financing structure, the existing PPAs and all their respective terms would revert back to the City. The agreements are all being negotiated so that if terms or savings drop below an acceptable threshold, PWP has off- ramp provisions. Additionally, if the discount rate falls below a certain threshold, PWP has the option to cancel the limited assignment agreement and resume direct control of the PPAs.
As oth
er renewable PPAs reach commercial operation, PWP will consider additional prepay transactions to capture further savings when market conditions are favorable, which is another benefit to having the legal and financial documents and agreements in place for future efficiencies to transact again. As more clean energy PPAs are executed, Pasadena will be able to leverage those agreements while meeting the goal of being 100% carbon-free by 2030.
NEXT ST
EPS:
PWP will f
inalize the agreements and contracts required to engage in the transaction and request authorization from City Council, with current schedules anticipating requesting authorization in early November based on timing of the SCPPA Board of Director’s requirement for approval. The exact savings will be known when the transaction is completed after pricing and PWP will return with an update with solidified savings projections.
134
ITEM #4
135
PASADENA WATER AND POWER
MEMORANDUM
October 28, 2025
To: Muni
cipal Services Committee
From:
David M. Reyes
General Manager
Subje
ct: 2025 Public Health Goal s Report on Water Quality in Compliance with State Standards
Att
ached is the 2025 Public Health Goals (“PHG”) Report for Pasadena Water and Power (“PWP”). This memo is for information only. The Municipal Services Committee (MSC) may, however, take action relating to this item as it deems appropriate following consideration and discussion of the matter.
BACKGROUND
Cali
fornia Health and Safety Code Section 116470 (b) requires water utilities that serve more than 10,000 service connections to prepare a Public Health Goals Report every three years in addition to the annual Consumer Confidence Report (“CCR”). The PHG Report must contain information on the “detection” of any contaminants at concentrations greater than the PHG or the Maximum Contaminant Level Goal (“MCLG”) set for the contaminant. The purpose of the legislation which establishes this requirement is to provide consumers with information on levels of contaminants even below the enforceable mandatory Maximum Contaminant Levels (“MCLs”) so they are aware of whatever risks might be posed by the presence of such constituents.
Additionally, the report must provide an estimate of the cost to reduce the concentration of the contaminants to below the PHG.
• PHG –
The Public Health Goal is not a legally enforceable standard. It is a “risk assessment” value that estimates the lowest concentration of a substance which would not pose a significant public health risk. It is determined solely on health effects. The PHG is set by the California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment.
136
• MCLG – The Maximum Contaminant Level Goal is not a legally enforceable standard. It is a “risk assessment” value that estimates the lowest concentration of a substance which would not pose a significant public health risk. It is determined solely on health effects. The MCLG is set by the United States Environmental Protection Agency.
• MCL –
The Maximum Contaminant Level is a legally enforceable standard. It is a “risk management” value which is as close to the PHG or MCLG as is technologically and economically feasible. For example, if the PHG is set at a concentration which is too small to measure, the MCL cannot be set at the PHG.
If the Best Available Technology for the removal of a contaminant can only reduce the concentration to a certain amount, the MCL cannot set below that value. All Community Water Systems (“CWSs”) must comply with the MCL.
PHG AND T
HE CCR
The PH
G Report is different from the CCR, which is published annually and sent directly to all the customers of the CWSs. Only large CWSs are required to prepare a PHG Report every three years and are posted on PWP’s webpage. The PHG Report includes health and cancer risk values and treatment costs, while the CCR does not. The PHG Report is presented to the governing board of the CWS, providing opportunities for public comments, questions, and feedback.
2025 PHG R
EPORT
PWP
met all the California Department of Public Health and United States Environmental Protection Agency drinking water standards to protect public health. To further reduce the levels of the contaminants identified in the PHG Report would require costly treatment processes while the health protection benefits of these hypothetical reductions are not clear and not quantifiable. For more information about PWP’s water quality and to review the 2025 Public Health Goals report, the public can visit www.PWPweb.com/WaterQuality.
Att
achment: 2025 Public Health Goal Report
137
City of Pasadena Water and Power Department | 150 S Los Robles Suite 200, Pasadena, CA 91101 2025
PUBLIC HEALTH GOALS
REPORT
7/1/2025
138
Table of Contents
Glossary of Acronyms .................................................................................................................................... 1 Background ................................................................................................................................................... 2 What are PHGs? ............................................................................................................................................ 2 Water Quality Data Considered and Report Guidelines ............................................................................... 2 Best Available Technology (BAT) and Cost Estimates ................................................................................... 3 Pasadena Water System Description and Water Quality ............................................................................. 3 Sunset Reservoir Blending Plan ................................................................................................................ 4 Monk Hill Treatment and Windsor Reservoir Blending Plan .................................................................... 4 Eastside Wells Collector Pipeline, Wadsworth Groundwater Treatment Plant, and Jones Reservoir Blending Plan ............................................................................................................................................ 4 Constituents Detected That Exceed a PHG or a MCLG ................................................................................. 5 Arsenic....................................................................................................................................................... 6 Hexavalent Chromium .............................................................................................................................. 6 Fluoride ..................................................................................................................................................... 6 Bromate .................................................................................................................................................... 7 Lead and Copper ....................................................................................................................................... 7 Perchlorate ................................................................................................................................................ 8 Total Coliform ........................................................................................................................................... 9 Uranium .................................................................................................................................................... 9 Gross Alpha ............................................................................................................................................. 10 Tetrachloroethylene (PCE) ...................................................................................................................... 10 Recommendations for Further Action ........................................................................................................ 11 Agency Hierarchical Chart ........................................................................................................................... 11 139
2025 Public Health Goals Report
1 Glossary of Acronyms
ACWA – Association of California Water Agencies
AL – Action Level
BAT – Best Available Technology
Cal-EPA – California Environmental Protection Agency
DDW – Division of Drinking Water
DLR – Detection Limit for Reporting Purposed
IX – Ion Exchange
LCR – Lead and Copper Rule
LGAC – Liquid Phase Granular Activated Carbon
MCL – Maximum Contaminant Level
MCLG – Maximum Contaminant Level Goal
mg/L – milligrams per liter
MHTP – Monk Hill Treatment Plant
MWD – Metropolitan Water District
ND – Not Detected
O&M – Operations and Maintenance
OEHHA – Office of Environmental Health Hazard Assessment PCE - Tetrachloroethylene
pCi/L – pico Curies per liter
PHG – Public Health Goal
rTCR – revised Total Coliform Rule
SWRCB – State Water Resource Control Board
1,2,3-TCP – 1,2,3-Trichloropropane
g/L – micrograms per liter
USEPA – United States Environmental Protection Agency
VOC – Volatile Organic Compound
140
2025 Public Health Goals Report
2 Background
The California Health and Safety Code specifies that Community Water Systems with more than 10,000 service connections must prepare a report every three years identifying any constituents in the water system that exceed the Public Health Goals (PHGs) levels within the three preceding calendar years.
PHGs are established by the California Environmental Protection Agency’s (Cal-EPA) Office of Environmental Health Hazard Assessment (OEHHA) and are used for health risk assessments. The law states that if no PHG is established by OEHHA, then water suppliers must use the Maximum Contaminant Level Goal (MCLG) adopted by the United States Environmental Protection Agency (USEPA) in their risk assessment if one exists.
The purpose of this report is to inform the City of Pasadena’s (City’s) customers of any constituents that were detected in the City’s water system during calendar years 2022, 2023 and 2024 at a level exceeding a PHG or MCLG. This report will provide the following information as required by law: the category or type of risk to health that could be associated with each constituent, the numerical public health risk associated with the MCL and the PHG or MCLG, the Best Available Technology (BAT), if available, that could be used to reduce the constituent level and an estimate cost to install that treatment.
Constituents, including naturally occurring minerals, that are routinely detected in the City’s water system but have no PHG or MCLG and have not been adopted by OEHHA or USEPA, will not be addressed in this report.
What are PHGs?
PHGs are set by OEHHA and are non-enforceable goals that are based solely on public health risk consideration. PHGs are numerical contamination levels that are deemed minimal to no risk to the public while disregarding risk management factors. Risk management factors include analytical detection capabilities, available treatment technology, benefits and costs. MCLGs are the federal equivalent to PHGs, are set by the USEPA, and unlike PHGs, can be set at zero. Instead of PHGs or MCLGs, public water systems follow drinking water standards called maximum contaminant levels (MCLs). MCLs are set by the California State Water Resources Control Board (SWRCB) - Division of Drinking Water (DDW) and take into account risk management factors while protecting the public’s health. DDW regulates public water systems, including the City’s water system. Drinking water that meets these MCL drinking water standards has little to no risk and is regarded as safe for consumption.
Water Quality Data Considered and Report Guidelines
Water quality data from the City’s water system used to determine compliance with DDW requirements between 2022 and 2024 was used for this report. In some cases, compliance is based on levels after treatment. For other parameters, compliance is based directly on well water results. This report discusses parameters that were found above the Detection Limit for Reporting (DLR) for that parameter and also above the associated PHG/MCLG. The DLR is a designated minimum level at or above which any analytical finding shall be reported to DDW.
141
2025 Public Health Goals Report
3 The Association of California Water Agencies (ACWA) provided guidelines for water utilities to use in preparing these required reports. The 2025 ACWA guidelines were used to prepare this report. No guidelines were available from the state regulatory agencies.
Best Available Technology (BAT) and Cost Estimates
USEPA and DDW adopted Best Available Technologies (BATs) which are best known methods of reducing contaminant levels. It is required by law in this report to produce cost estimates for BATs to lower constituents down to the PHG or MCLG level. However, it is not always feasible to determine what treatment is needed to further reduce a constituent down to the PHG or MCLG. Many PHGs and MCLGs are set to a numerical value far below the DLR. This makes it challenging, and at times impossible to verify if constituents were reduced to the PHG by existing analytical means. In other cases, installing treatment to further reduce a constituent to PHG or MCLG levels could adversely affect other aspects of water quality.
Many of the constituents that are above the PHG in the City’s water system can be removed with multiple BATs. Only BATs that are able to address multiple water contaminants within the City’s water system and considered effective for large public water systems are provided in this report. Note that the BATs described in this report may still not achieve the PHG or MCLG levels and the costs may be significantly higher to do so.
These rough cost estimates for the BATs are based upon:
ACWA’s guidelines for the cost of BATs
A worst-case basis assuming that there is no treatment currently in place The designed water capacity for each well that contains the constituents above the PHG and DLR, multiplied by the annualized capital cost and Operations and Maintenance (O&M) per 1,000 gallons of water. This value is divided by the number of customers the City serves to calculate the cost per capita.
Pasadena Water System Description and Water Quality
Approximately two thirds of the City’s water supply comes from imported water purchased from the Metropolitan Water District (MWD) of Southern California, while the rest is provided from local groundwater sources. The City maintains sixteen groundwater wells, six of which are considered “inactive” by DDW. The City also has five interconnections with MWD and several more with other water retailers. Water quality issues have been found in several wells. Wells that are operational and impacted by a contaminant are either blended or treated to ensure that the water does not exceed the MCL. Common water quality constituents in the City’s water sources are nitrate, perchlorate, 1,2,3- Trichloropropane (1,2,3-TCP) and volatile organic compounds (VOCs) contamination. The Monk Hill Treatment System (MHTS), Wadsworth Groundwater Treatment Plant (WTP), Windsor Reservoir Blending Plan, Sunset Reservoir Blending Plan, and Jones Reservoir Blending Plan discussed below were reviewed by DDW and approved for use.
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2025 Public Health Goals Report
4 Sunset Reservoir Blending Plan
Two groundwater wells can be blended with MWD water at Sunset Reservoir before water is delivered to the customers. Of the two wells, Bangham and Sunset Wells, only one can be utilized at a time per the blending plan. Bangham and Sunset Wells have nitrate, perchlorate, 1,2,3-TCP and VOC levels above the MCL. When one of the wells is in use, they are mixed with MWD water, which has low or undetectable levels of nitrate, perchlorate, 1,2,3-TCP and VOCs.
The City created the Sunset Reservoir Blending Plan to provide operational procedures and guidelines for mixing Sunset blending wells with MWD water. The objective of the plan is to ensure that the City maintains nitrate, perchlorate, 1,2,3-TCP and VOC concentrations below 80% of the respective MCLs in Sunset Reservoir and the distribution system. The blending plan takes effect if either of the Sunset blending wells are in operation. Once the plan is in effect, regular water quality monitoring at the Sunset Reservoir is performed to ensure that the water delivered meets the blending objective (80% or lower of the respective MCL).
Monk Hill Treatment and Windsor Reservoir Blending Plan Groundwater in the Arroyo Seco area is known to have elevated levels of perchlorate, nitrate, and VOCs, which have affected three of the City’s wells necessitating limiting their use from the late 90s until 2011.
In October of 2011, the City inaugurated the Monk Hill Treatment System (MHTS). MHTS was designed to remove perchlorate by ion exchange technology (IX) and VOCs by Liquid Phase Granular Activated Carbon (LGAC) technology. The MHTS treatment objective is to have undetectable amounts of perchlorate and VOCs at the plant effluent. The treated water is then disinfected and discharged into Windsor Reservoir before it is delivered to customers. The water from different wells can be blended to control nitrate levels in Windsor Reservoir.
Similar to Sunset Reservoir, a blending plan was created to manage nitrate concentrations with a blending objective of less than 80% of the MCL. MHTS undergoes weekly monitoring to ensure compliance with the MHTS treatment goals. Due to low water levels and high nitrate concentrations in Ventura, and Well 52, the vast majority of water produced and treated has come only from Arroyo Well, which has lower levels of nitrate.
Eastside Wells Collector Pipeline, Wadsworth Groundwater Treatment Plant, and Jones Reservoir Blending Plan
The City has four active local groundwater wells located in the eastside portion of Pasadena. These wells are Chapman, Twombly, Wadsworth, and Woodbury Wells. Woodbury Well has elevated concentrations of nitrate, perchlorate, and levels of 1,2,3-TCP that exceed the MCL. Wadsworth Well has also shown elevated concentrations of nitrate and 1,2,3-TCP that exceed the MCL. In 2023, the City completed Wadsworth Treatment Plant (WTP) to treat Wadsworth and Woodbury Wells for 1,2,3-TCP removal. The Eastside Well Collector Pipeline, which was placed into operation in 2015, diverts flow from the offsite Woodbury Well to WTP. The treated groundwater from WTP is then conveyed to the Eastside Collector Pipeline. The Eastside Collector Pipeline can either divert water flows from Chapman and Twombly 143
2025 Public Health Goals Report
5 Wells directly into the distribution system, or into Jones Reservoir where water from the aforementioned wells can be blended with WTP-treated water or with MWD water. Wadsworth and Woodbury Wells can only be operated if they are treated through WTP and blended with other wells or MWD water. The Eastside Well Collector Pipeline was implemented to increase the City’s groundwater pumping capacity by blending well water sources containing lower contaminant levels with water sources containing higher contaminant levels.
The City created the Jones Reservoir Blending Plan to provide operational procedures and guidelines for blending treated Woodbury Well and or Wadsworth Well with MWD water or other Eastside Wells. The objective of the plan is to ensure that the City maintains nitrate, perchlorate, and 1,2,3-TCP concentrations below 80% of the respective MCLs in Jones Reservoir and the distribution system.
Constituents Detected That Exceed a PHG or a MCLG
Water quality data from the City’s water system used to determine compliance with DDW requirements between 2022 and 2024 were used for this report. The following information is in regards to constituents that were detected in one or more compliance locations of the City’s water system or in supplemental water purchased from MWD at levels exceeding the DLR and PHG or MCLG (when no PHG is adopted by OEHHA). As long as the drinking water measurement levels are below the MCL set by DDW, the drinking water is considered safe for consumption. Table 1 refers to constituents that were above the PHG that will be addressed in this report with their respective MCL, PHG or MCLG, DLR, and BATs.
Table 1: Constituents found in the City of Pasadena’s water systems that were above the Public Health Goals (PHG) or Maximum Contaminant Level Goal (MCLG) (when no PHG is adopted by OEHHA), and its respective Maximum Contaminant Limit (MCL) or Action Level (AL), Detection Limits for Reporting (DLR), and Best Available Technologies (BATs) to reduce constituents from the MCL to the PHG.
Constituent PWP
Levels
MCL/(AL) PHG/MCLG DLR BATs Total
Cost/Year
(in $ millions)
Cost per
Capita/Year
Arsenic (µg/L) ND – 2.3 10 0.004 2 IX, B, RO
CF, GFO
$19.1 $116
Chromium, Hexavalent
(µg/L)
ND – 8.6 10 0.02 1 Weak
Base IX,
RCF
$13.3 to
$55.6
$81 to $338
Fluoride (mg/L) 0.3-1.4 2 1 0.1 IX, RO, AA,
B
$4.0 to $11.6 $24 to $70
Bromate (µg/L) ND – 12
(Highest
Running
Annual
Average: 2.4)
10 0.1
1.0 control of
ozonation
n/a n/a
Copper (mg/L) ND – 1.6
(90th
percentile
value: 0.26)
1.3 0.3
0.05 n/a n/a n/a
Perchlorate (µg/L) ND – 5.0 6 1 2 IX $3.6 to $13 $22 to $77 Total Coliform (%) 0.0 – 4.7 5 0 n/a n/a n/a n/a
Uranium (pCi/L) 4.4 – 13 20 0.43 1 RO $7.5 to $64.0 $46 to $390 144
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6 Gross Alpha (pCi/L) ND – 12 15 0 3 RO $7.5 to $64.0 $46 to $390 Tetrachloroethylene (µg/L) ND – 0.81 5 0.06 0.5 PAT, GAC $0.6 to $1.2 $4 to $7 Note: ND: Not Detected, IX: Ion Exchange, RO: Reverse Osmosis, AA: Activated Alumina, B: Blending, RCF: Reduction Coagulation Filtration, PAT: Packed Aeration Tower, GAC: Granular Activated Carbon, CF: Coagulation Filtration, GFO: Granular Ferric Oxide Resin; mg/L = milligram per liter (or parts per million (ppm)), g/L = microgram per liter (or parts per billion (ppb)), ng/L = nanogram per liter (or parts per trillion (ppt)), pCi/L = picocuries per liter Arsenic
Arsenic is a semi-metal that enters drinking water via natural deposits or through industrial or agricultural uses. People who drink water containing arsenic above the MCL over many years may experience skin damage or circulatory problems. Arsenic is also categorized as a carcinogen and increases the risk of cancer when drinking water with arsenic above the MCL over a lifetime. The health risk associated with Arsenic is 2.5 x10
-3, or 2.5 surplus cases of cancer per thousand people drinking water above the MCL over a lifetime. Arsenic was detected above the PHG for two of City of Pasadena’s wells.
Between 2022 and 2024, Arroyo Well and Wadsworth Well had arsenic above the PHG and DLR. Arroyo Well had an arsenic concentration value of 2.1 µg/L in 2022. Wadsworth Well had an arsenic concentration of 2.3 µg/L in 2022. Arsenic concentrations for both wells are below the MCL of 10 µg/L.
Further reduction of arsenic, below the MCL would require reverse osmosis, ion exchange, granular ferric oxide resin, or coagulation filtration. The applicable BAT for the City’s water system would be an ion exchange system. The annualized capital cost including O&M cost for an ion exchange system to treat all wells impacted with arsenic would cost $19.1 million, or $116 per capita per year.
Hexavalent Chromium
Hexavalent chromium, or Chromium VI, is a heavy metal that enters drinking water via erosion of natural deposits or though industrial waste discharge. People who drink water with levels of hexavalent chromium above the MCL are at a higher risk of developing cancer. The cancer risk of hexavalent chromium at the MCL of 0.010 mg/L is 5×10-4 or 5 surplus cancer cases per ten thousand people. For people drinking water with concentrations of hexavalent chromium above the PHG of 0.00002 mg/L during their lifetime, the cancer risk is 1x10-6, or one surplus case of cancer per one million people.
All of the City’s groundwater wells contain a concentration of hexavalent chromium higher than the PHG from 2022 to 2024. The concentration of hexavalent chromium ranged from 0.00081 to 0.0086 mg/L.
The BATs to reduce hexavalent chromium concentrations at the City’s groundwater wells are weak base ion exchange and reduction-coagulation-filtration. Weak base ion exchange is the more cost effective method, with an annual cost of $13.4 to $55.6 million, or $81 to $338 per capita per year.
Fluoride
Fluoride is a naturally occurring element, dissolved into drinking water via erosion of natural deposits.
Fluoride is sometimes added to drinking water supplies as a public health measure to prevent tooth decay. Drinking water with fluoride above the federal MCL of 4 mg/L over many years may cause 145
2025 Public Health Goals Report
7 fluorosis, which affects one’s teeth and bones. Children who drink water containing fluoride above the state MCL of 2 mg/L may develop mottled teeth. For fluoride, there is no cancer risk associated with drinking water above the PHG, or the MCL.
The City’s groundwater wells have naturally occurring fluoride concentration ranging from 0.30 to 1.36 mg/L. In 2007, MWD started fluoridating their water at an average concentration of 0.7 mg/L, the average concentration at the City’s wells is a concentration of 0.8 mg/L. The fluoride concentrations of the City’s wells are below the state and federal MCL and, in some cases, below the PHG. Wells and reservoirs are monitored quarterly to ensure that fluoride concentrations are below the MCL.
The BATs to reduce fluoride levels at the few City wells that exceed the PHG of 1 mg/L are ion exchange, reverse osmosis, activated alumina and blending. Ion exchange is found to be the most cost effective method to remove fluoride within the City’s system. The annualized capital cost including O&M for an ion exchange system to treat all wells over the PHG for fluoride would cost $4.0 million to $11.6 million, or $24 dollars to $70 per capita per year.
Bromate
Bromate is a byproduct of drinking water disinfection operations formed when water containing naturally occurring bromide ion is ozonated. The cancer risk associated with drinking water with bromate greater than the MCL of 10 µg/L is 1x10-4, or one surplus cancer case per ten thousand people who drink water in excess of the MCL over a lifetime. The cancer risk for bromate at the PHG of 0.1 µg/L is 1x10-6, or one surplus cancer case per million people drinking water in excess of the PHG over a lifetime.
Bromate is formed only during ozonation and the MCL applies only to water treatment plants that use ozone. Therefore, this MCL does not apply to the City’s groundwater sources. However, the supplemental water the City receives from MWD’s Weymouth Treatment Plant has been ozonated since late 2017. The water the City received from MWD met the MCL for bromate at all times, but exceeded the PHG for bromate since ozonation was implemented. The bromate in the water the City received from MWD ranged from ND (Not Detected) to 12.0 µg/L and the highest Running Annual Average was
2.4 µg/L.
The BAT to reduce bromate is managing the ozone treatment process to reduce production of this byproduct. As such, this process is under the control and jurisdiction of MWD. MWD already applies BAT control of the ozonation process at Weymouth treatment plant and no further consideration will be addressed in this report.
Lead and Copper
Lead and copper are both metals that can originate from the internal corrosion of household water plumbing systems. Lead can also potentially come from industrial manufacturer discharges and copper may be from leached wood preservatives. There are no MCLs for lead and copper. Rather, both lead and copper have an action level (AL) of 15 µg/L and 1.3 mg/L respectively. This establishes that if the 146
2025 Public Health Goals Report
8 90th percentile level exceeds the action level(s), the water system could be triggered into heightened monitoring, corrosion control treatment, public education and lead service line replacement.
Infants and children who drink water containing lead in excess of the action level may experience delays in their physical or mental development. Adults who drink this water over many years may endure adverse effects to the nervous system, an increased risk of cancer, kidney problems and high blood pressure. The cancer risk associated with drinking water above the lead action level over a lifetime is 2x10
-6, or two surplus cases of cancer per million people. The cancer risk for lead at the PHG level of 0.2 µg/L is less than1x10-6, or one surplus cancer case per million people drinking water over a lifetime. The health risk associated with drinking water with copper above the AL is digestive system toxicity (nausea, vomiting, and diarrhea). For copper, there is no cancer risk associated with drinking water above the AL or PHG.
Every three years a targeted pool of higher risk homes are tested for lead and copper levels under the Lead and Copper Rule (LCR). Customers’ homes that are identified as higher risk, such as those that had new plumbing installed before the ban of lead in solder took place have their tap water tested for lead and copper. This testing took place in the City most recently in 2023. As described above, if the 90th percentile value at tested homes exceeds the action level for lead and/or copper then the City must undergo additional actions to control corrosion. In 2023 the 90th percentile value of the samples taken for lead was ND. Therefore, the PHG was not exceeded for lead. Additionally, the 90th percentile value of the samples taken for copper was 0.26 mg/L. The level of copper in the samples of the homes ranged from <0.05 mg/L to 1.60 mg/L.
The City already has water sources that naturally contain calcium carbonate that is a compound used for corrosion control treatment. Thus, the City’s water system already has optimized corrosion control and is in full compliance with the Federal and State LCR. It is unclear if any additional steps should be considered without causing other potential water quality problems. Hence, no BAT assessment is needed for lead and copper.
Perchlorate
Perchlorate is an inorganic chemical used in solid rocket propellant, fireworks, explosives, flares, matches and a variety of industries. Perchlorate has been shown to interfere with the uptake of iodide by the thyroid gland and thereby reduces the production of thyroid hormones leading to adverse effects associated with inadequate hormone levels. Thyroid hormones are needed for normal prenatal growth and development of the fetus, as well as for normal growth and development in the infant and child. In adults, thyroid hormones are needed for normal metabolism and mental function. For perchlorate, there is no cancer risk associated with drinking water above the PHG or the MCL.
The City manages perchlorate in several ground water wells by adhering to blending plans at Sunset and Jones Reservoirs and by means of the Monk Hill Treatment System previously described. Perchlorate was detected in Sunset Reservoir, Jones Reservoir, and Windsor Reservoir at levels ranging from ND to
5.0 µg/L with an average of ND. These levels were below the MCL of 6 µg/L and met the blending objective of 80% of the MCL, but were at times, above the PHG of 1 µg/L. 147
2025 Public Health Goals Report
9 The BAT to further reduce perchlorate levels in Sunset and Jones Reservoirs beyond blending is ion exchange (IX). The additional annualized cost for IX ranges from $3.6 to $13 million dollars, or $22 to $77 per capita per year.
Total Coliform
Total Coliform bacteria are naturally present in the environment and are used as indicators of potentially harmful pathogens. Once a sample is positive for total coliform, the City must also test that sample for E. Coli, which causes short-term effects such as diarrhea and cramps. These samples are collected from the City’s water distribution system and may not collectively exceed more than 5% positive for total coliform in any given month. There is no PHG for total coliform, but an MCLG of zero set by the USEPA was in effect until April 2016 after which the MCLG was removed and replaced with a system assessment requirement under the Revised Total Coliform Rule (rTCR). The Total California MCLG stayed in effect until July 2021 when California adopted the rTCR.
The City has a rigorous total coliform testing program, in which more than thirty distribution sites are tested each week to ensure the health of the City’s distribution system. The City collects 133 to 163 samples each month to test for total coliform within the City’s distribution system.
From 2022 to 2024, the monthly percentage of total coliform samples testing positive above the MCLG ranged from 0.0% to 4.7%. The total coliform positive results were above the MCLG of zero, but below the MCL. None of the samples were found to be positive for E. Coli.
The City works closely with their regional supplier MWD to ensure proper disinfection within the City’s water system. The City takes all measures described by DDW as BAT for coliform bacteria in Section 64447, Title 22 of the California Code of Regulations. These measures include an effective cross- connection control program to protect the wells and the distribution systems from coliform contamination, maintaining a disinfectant residual throughout the system, an effective monitoring and surveillance program, and maintaining positive pressures in the distribution system. Further disinfection may cause adverse water quality effects within the City’s distribution system. Therefore, no estimated cost has been included to further reduce total coliform.
Uranium
Uranium is a radioactive compound that naturally occurs in varying amounts in the earth’s crust. People who drink water containing uranium in excess of the MCL over many years may have kidney problems or an increased risk of getting cancer. The cancer risk associated with drinking water with uranium greater than the MCL of 20 pCi/L is 5x10
-5, or five surplus cancer cases per hundred thousand people who drink water in excess of the MCL over a lifetime. The cancer risk for uranium at the PHG of 0.43 pCi/L is 1x10-6, or one surplus cancer case per million people drinking water in excess of the PHG over a lifetime.
From 2022 to 2024, uranium analyses were conducted for the following wells: Arroyo, Ventura, Well 52, Chapman, Twombly, Woodbury, and Sunset Wells. Uranium was found above the PHG for all of these wells, but below the MCL of 20 pCi/L. Uranium levels ranged from 4.4 to 13 pCi/L between 2022 and 2024 for these wells.
148
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10 Further reduction of uranium to the level at or below the PHG would require the BAT of reverse osmosis. The annualized cost for reverse osmosis ranges from $7.5 to $64 million, or $46 to $390 per capita per year.
Gross Alpha
Gross Alpha is a measure of several different radioactive substances that naturally occur in well water due to the erosion of natural deposits. These include radium 226, radium 228, and uranium. There is a health risk of obtaining cancer for people who drink water containing gross alpha above the MCL of 15 pCi/L for many years. The cancer risk associated with gross alpha particles is 1x10 -3, or one surplus
cancer case per one thousand people who drink water above the MCL over a lifetime. There is no PHG for gross alpha; however, an MCLG of zero was adopted for Gross Alpha.
From 2022 to 2024, gross alpha and radium particle tests were conducted for Arroyo, Ventura, Well 52, Chapman, Twombly, Wadsworth, Woodbury, and Sunset Wells. Gross alpha was detected above the MCLG but below the MCL on seven of eight wells with a range of ND to 12 pCi/L. Gross Alpha was far below the MCL for wells once the gross alpha value was adjusted by subtracting the uranium value.
For gross alpha, there may not be commercially available technology to reach a MCLG of zero. However, a further reduction of gross alpha would require reverse osmosis as the BAT for a large public water system. The annual cost for reverse osmosis ranges from $7.5 to $64 million, or $46 to $390 per capita per year.
Tetrachloroethylene (PCE)
Tetrachloroethylene (PCE) is a VOC and is a common soil contaminant. It is prevalent in discharge from factories, dry cleaners and auto shops. PCE has an MCL of 5 µg/L and there is an increased health risk for cancer for people who drink water above the MCL throughout their lifetime. The cancer risk for this compound at the MCL is 8x10
-5, or eight surplus cancer cases per hundred thousand people drinking water above the MCL over a lifetime. The cancer risk for this compound at the PHG level of 0.06 µg/L is 1x10-6, or one surplus cancer case per million people drinking water in excess of the PHG over a lifetime.
PCE was above the PHG of 0.06 µg/L for Sunset Reservoir between 2022 and 2024 with levels ranging from ND to 0.81 µg/L with an average of 0.28 µg/L. PCE levels were above the PHG but well below the MCL of 5 µg/L. Traces of PCE entering Sunset Reservoir come from Bangham and Sunset Wells. As described in the “Sunset Reservoir Blending Plan” section above, these two wells are blended with MWD water, which has undetected levels of PCE. Water from Sunset Reservoir enters the distribution system after disinfection. PCE was not detected in Jones Reservoir or in the Monk Hill Treatment System.
The associated BATs to reduce PCE at Sunset Reservoir beyond blending to a level at or below the public health goal are packed aeration tower and granular activated carbon. The most feasible BAT is a Liquid Phase GAC system, similar to the one installed in MHTS. The estimated annual cost of a Liquid Phase GAC system for all wells containing PCE, including O&M cost ranges from $600,000 to $1,200,000. The estimated cost for the system per capita is $3 to $7 per year. 149
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11 Recommendations for Further Action
The City’s drinking water meets all California SWRCB’s DDW and USEPA drinking water standards set to protect public health. All constituents identified in this report are below the MCL after treatment via the City’s MHTS , WTP, or other rigorous blending plans. To reduce the constituents further would be at an additional treatment process, which would be costly to the City. For some constituents, there are also no analytical methods to measure whether it has been reduced to or below the PHG/MCLG.
Furthermore, reduction of the constituents to such levels may adversely affect other aspects of water quality. The health benefits in this hypothetical reduction of constituents are unquantifiable, therefore no further action is proposed.
Agency Hierarchical Chart
USEPA
(sets Federal MCLs
and MCLGs)
CalEPA
OEHAA
(sets non-enforceable
PHGs. PHGs are the
State equivalent of
Federal MCLGs)
SWRCB-DDW
(sets State MCLs)
150