Good Neighbor Policy

Ellsworth II- Battery Energy Storage System (BESS)
+/- 20.32 acres
Mesa, Arizona
Good Neighbor Policy
Submitted by:
Pew & Lake, PLC
1744 South Val Vista Drive, Suite 217
Mesa, AZ 85204
480-461-4670
On behalf of:
Submitted to:
The City of Mesa
Planning & Zoning Division
May 18, 20265

Introduction
Pew & Lake, PLC (the “Applicant”) on behalf of Ellsworth Energy Center, LLC, a
subsidiary of NextEra Energy Resources, LLC (“NextEra”), is pleased to submit this Good
Neighbor Policy to the City of Mesa (the “City”) in support of a rezoning request for the
development of a Battery Energy Storage System (BESS) facility (the “Project”). The
Project is proposed to be developed on approximately 20.32 acres of property located on
the north side of Starfire Avenue, east of Ellsworth Road (the “Property”). The Property is
shown below and is a portion of Maricopa County Assessor parcel number 304-31-0149A.
The approximate boundary of the entire parcel is shown below, outlined in red.
Purpose
This Good Neighbor Policy is provided to the City in compliance with Section 11-31-37 of
the Mesa Zoning Ordinance (the “BESS Ordinance”). The purpose of this document is 1)
to provide the City with the operational details of the proposed BESS facility; 2) to facilitate
an understanding of the operations that will take place within the facility and 3) to establish
mechanisms by which operational concerns may be addressed.
Description of Project
The BESS facility on the Property will be developed consistent with the Light Industrial
zoning requirements and development standards contained in Section 11-8-3 of the Mesa

Zoning Ordinance (“MZO”). Most of the property will be devoted to the installation of
BESS units and ancillary equipment. Shown on the cover of this document is a
representation of what the BESS units will look like on the property.
In addition to the BESS units, the property will contain interior drive aisles and perimeter
improvements that will secure the property while providing an aesthetically pleasing
appearance.
Good Neighbor Policy
In the interest of being a good neighbor, the proposed BESS facility has been designed
in compliance with the BESS Ordinance, and with sensitivity to the existing and planned
surrounding uses:
• This location has been selected by NextEra not only for its proximity to the adjacent
SRP Scott substation, but because of its lack of proximity to residential
development. Situated next to the SR 24 Freeway, within an industrial park, and
over 1/3 mile away from residential development.
• The project will be secured by an opaque screening wall or fence that is one-foot
taller than the tallest piece of equipment on the site and will be compliant with
applicable BESS ordinance standards.
• Vehicular and pedestrian access to the site will be limited. Authorized NextEra
personnel will have access to the site, which will be controlled by Knox boxes at
each entry point, in compliance with the Mesa Fire Code Restricted Gate
Procedures.
• The project will meet all sound-related operational requirements of the applicable
BESS ordinance. Sound attenuation may be accomplished through a combination
of methods including: a screen wall designed with an opaque material that can
also provide sound attenuation properties; inverter attenuation kits; and battery
silencers. Through the site design process, NextEra will model the equipment to
ensure that the project complies with the City of Mesa Noise Ordinance and does
not increase the pre-construction ambient noise levels. The noise levels will be
measured at the time a Certificate of Completion is issued, and annually for five
years post-construction. NextEra will work with the City of Mesa to address any
sound-related concerns.
• Lighting at the BESS facility has been designed to minimize impacts on adjacent
properties. There is no lighting on the BESS equipment or structures, and there
will only be motion-detected lighting at the entrances to the site. During the
construction permitting process, NextEra will provide a photometric plan to the City
to ensure that any lighting on the property is designed to minimize any light
trespass to surrounding properties.

• NextEra employs safety measures onsite that include real-time sensors within the
BESS containers that continuously track parameters like battery temperature,
current voltages, temperatures within the enclosures, and the status of the doors
and ventilation systems. Any deviation from normal conditions is detected by the
Renewable Operations Control Center (ROCC), a remote facility that operates 24
hours a day, 365 days a year. If necessary, local battery technicians may be
dispatched to the site to address issues. The ROCC can also remotely shut down
the entire facility if necessary.
• Emergencies are prevented by the selection of batteries and equipment that are
engineered to meet the highest standards of safety and fire protection, and to
minimize asset risk. The batteries undergo rigorous testing and certification by the
National Fire Protection Association (NFPA), and Underwriter’s Laboratories (UL).
As noted above, thermal management equipment is in place that directs the facility
to operate within ideal operational temperatures. NextEra develops emergency
action plans with local fire departments to ensure that first responders understand
BESS technology, and the safety protocols that are necessary to protect the
community while responding properly to any incident.
Upon formal construction plan submittal, NextEra will provide the City of Mesa with
a Hazard Mitigation Analysis, the results of a Large-Scale Fire Test, an Operations
and Maintenance Manual, Fire and Explosion Testing Data, and an Operational
Plan. Each of these documents will meet the standards established by the NFPA,
or Mesa Fire Code.
• The Ellsworth II site will be maintained at appropriate intervals throughout the year.
Equipment inspections are conducted at least twice annually, as are the fire and
safety systems. Technicians will visit the site weekly to perform general upkeep
including routing visual inspections and general upkeep. Landscaping will be
irrigated and maintained through a contract with a local landscape contractor.
Plan of Operation
Upon the completion of construction and issuance of a Certificate of Completion, the
BESS facility will largely be unmanned and run on a continuous basis.
As previously noted, on an intermittent basis, NextEra employees will visit the site to
perform equipment testing and maintenance.
Complaints or Concerns

If any complaints or concerns arise from the operation of the facility, the procedure for
responding to those concerns is as follows:
1. Complaints or concerns may be reported by contacting the phone number posted
on the project site wall.
2. Reported concerns will be routed to the appropriate project representative for
review and follow-up, as necessary.
Contact Information
Stephanie Rush
Project Director, Development
NextEra Energy Resources
700 Universe Blvd Juno Beach, FL 33408
Stephanie.Rush@nexteraenergy.com
1-561-386-7611
When the project is commissioned, this contact information will be revised to provide the
names of local individuals who will respond to any questions or concerns about the
project.