Twining, Inc. Final Proposal (available in the City Clerk's Reading File) — Santa Clarita City Council, September 23, 2025

CITY OF SANTA CLARITA

PROPOSAL TO PROVIDE
Construction Inspections and Material Testing Services
for the Santa Clarita Hydrogen Fueling Station Infrastructure Design Build Project

Proposal #TRT -25-26-02
August 25, 2025
Twining | City of Santa Clarita - Hydrogen Fueling Station 2 Tel 805.644.5100
Fax 562.426.6424
DIR No. 100005568
1879 Portola Road, Suite G
Ventura CA 93003August 25, 2025
Proposal No. 25-1620
City of Santa Clarita
ATTN: Purchasing
23920 Valencia Boulevard, #265
Santa Clarita, CA 91355
Subject: Proposal to Provide Construction Inspection and Materials Testing for the Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project | Proposal # TRT -25-26-02 Dear Purchasing Department:

Committed to supporting the City of Santa Clarita (City) in advancing critical infrastructure, Twining, Inc. (Twining) is pleased to submit our proposal and qualifications for the Hydrogen Fueling Station Infrastructure Project (Project). We understand the City is seeking a qualified firm to provide special inspections and materials testing services, and our team is prepared to work closely with the City’s Project Manager and staff to ensure the project’s successful completion while protecting the City’s interests. We have received Addendum No. 1 & 2 and reviewed the Q&A posted on the City's site.

Our History and Knowledge of the City
Twining has proudly served as a trusted partner to the City for more than a decade, consistently delivering the high-quality work you have come to expect from us. We recognize that time is of the essence, and we are prepared to begin providing services immediately upon contract execution. Our team is ready to hit the ground running, ensuring the project’s goals are met effectively and efficiently. Beyond our technical expertise, our long-standing relationship with the City has allowed us to identify opportunities that save both time and resources, ultimately benefiting the community you serve. The City remains a valued client and a cornerstone of our business, and we are committed to strengthening this partnership on this project and well into the future.

As the City’s team has evolved, Twining has continued to foster a strong working relationship and is proud to be considered part of the City’s public works family. We are committed to delivering this project on schedule and within budget, as we have consistently done in the past. Enclosed in this proposal are our firm and staff qualifications, a detailed work statement outlining our approach, and a proposed work schedule. In accordance with the RFP , our cost proposal has been provided separately.

We thank the City for the opportunity to present our qualifications. Twining’s expertise, leadership, technical resources, and commitment to quality will make us a valuable member of your team throughout the length of this contract. Should you have any questions related to this proposal, please contact Michael Molina at 951.552.0031 or via email at [email protected].

Sincerely,
Twining, Inc.

Twining is an Equal Opportunity Employer
We have reviewed the insurance requirements outlined by the City in its RFP and can comply.

Michael Molina Linas Vitkus, PE, GE
Client Services Manager/Point of Contact President & Chief Operating Officer (Authorized to negotiate on behalf of the firm) (Authorized to bind the firm to contract) Twining | City of Santa Clarita - Hydrogen Fueling Station 3

TABLE OF CONTENTS

1.1 RESPONSE FILE:

1.1.1. Introduction .................................................4

1.1.2. Experience and References .........................5

1.1.3. Scope of Work ........................................... 10

1.1.4 Personnel, Equipment and Facilities ...........24

1.1.5 Sub-Consultants .........................................37 Attachments .......................................................38 Form 1 - Notice to Proposers Regarding Contractual Requirements Form 2 - Designation of Subcontractors/Sub-consultants
Form 3 - References
Form 4 - Acknowledgment & Acceptance of Scope of Work
Form 5 - City of Santa Clarita Disclosure Statement
Form 6 - Equal Opportunity / Affirmative Action Statement Form 7 - Buy American Certification
Form 8 - Certification and Restrictions on Lobbying
Form 9 - Government-Wide Debarment and Suspension
Form 10 - DBE Participation Commitment
Form 11 - Letter of Intent and Affirmation DBE
Form 12 - DBE Information - Good Faith Efforts
Form 13 - Bidders List
Addendum 1 - Acknowledgment Form
Addendum 2 - Acknowledgment Form

1.2. Cost File ........................................................75 Submitted separately

POINTS OF CONTACT:

During Proposal Review And Negotiations: Michael Molina P| 951.552.0031 E| [email protected].

During Construction: Project Manger, Jeff Tawakoli, PE, P| 805.827-0742 E| [email protected].

REQUIRED STATEMENTS:
» Twining declares all aspects of the Proposal, including cost, have been determined independently, without consultation with any other Proposer for the purpose of restricting competition. » Twining declares all aspects of the Proposal, including cost, are valid for at least 180 days. » We declare that all statements, representations, and information provided in this Proposal and its attachments are true and correct. This declaration shall constitute a warranty, and any falsity or misrepresentation shall entitle the City to pursue any remedy available by law. » We agree that all aspects of the RFP and the Proposal submitted shall be binding if the Proposal is selected and a contract awarded.
» We agree to provide the City with any other information the City determines is necessary for an accurate determination of the Proposer’s ability to perform the Services as proposed. » Twining, Inc. agrees, if selected we will comply with all applicable rules, laws and regulations. » We have reviewed the RFP and terms and conditions in their entirety and have no exceptions to any requirements, terms or conditions.

Twining | City of Santa Clarita - Hydrogen Fueling Station 4

1.1.1. INTRODUCTION
The key to a successful construction project is consistent and prompt communication with the City, which means being available and responsive to any requests. Twining endeavors to prove ourselves as the right choice for this project apart from our long-standing history. Recently, we have provided services similar to this contract and partnered closely with the City's project management team to ensure success. Twining has the daily resources to satisfy the full range of needs required during this project, and we have demonstrated this during all of our past contracts with the City of Santa Clarita, as well as other local municipal clients, such as the cities of Valencia, Thousand Oaks, Agoura Hills, and Simi Valley.

In the following sections we outline our staff who will be committed to the project for the duration of construction.

Including their technical competence showing why they will be a great fit for this project. We will also outline and detail our work program and our successful project approach. In Section 1.1.3. we go into the details of each Task included in the project scope.

At Twining, Integrity
Is Our Foundation.

1.1 RESPONSE FILE:

Twining's legacy dates back over 127 years. What started as a family business in 1898 has evolved into one of California's largest geotechnical, materials testing, and construction inspection service providers. We are highly regarded by state and local agencies, developers, contractors, consultants, and the industry for providing high-quality services that are reliable, timely, and compliant. We employ some of the industry's most well-known construction experts who perform research and consult with regulatory agencies to shape the future of construction standard practices.

Relevant Qualifications and Experience
Twining is a full-service engineering and quality control company with unmatched technical expertise. As detailed below, our services span from QA/QC, materials testing, and inspection to highly technical capabilities in applied engineering and integrated disciplines. With laboratories throughout California and more than 185 inspectors, we are unequaled in our core competencies to work on vertical as well as horizontal construction projects:

Material Testing and Special Inspection
Geotechnical Engineering
Asphalt Pavement Quality Assurance Services
Asphalt Pavement Design and Materials Evaluations
Soils and Materials Testing and Inspection
Specialty Testing and Forensic Evaluation
Mobile Laboratory Services
Roofing and Waterproofing Consultation and Inspection
Applied Engineering and Research
Twining has developed a strong reputation by providing sound engineering, testing, and inspection services on even the most complex projects from inception through completion. Starting with the initial subsurface investigation and continuing through the inspection and laboratory testing required during construction, we have the engineering staff, experienced inspectors, and state-of-the-art laboratory facilities to meet your project needs.

This experience, along with our proven project management system, results in a seamless flow of communication throughout the project's scope and provides you with a single point of contact to ensure that all of your project needs are met. Twining endeavors to prove ourselves as the right choice for these projects apart from our long-standing history.

1.1.2. EXPERIENCE AND REFERENCES
Twining | City of Santa Clarita - Hydrogen Fueling Station 5

1.1 RESPONSE FILE:

Twining is financially solvent and has
sufficient liquidity to meet all current
obligations. There are no existing
conditions including bankruptcy,
pending litigation, planned office
closures or any impending mergers
which could impede the firm’s ability to
complete its current projects.

Twining does not have any
commitments or potential
commitments that may impact the
Proposer’s ability to perform the
Contract, if awarded.

Business Name: Twining, Inc.

Type of Legal Entity: California S
Corporation (C0366280)
DIR No: 100005568
Date Incorporated: January 2, 1959
Number of years in Business: 127
(founded in 1898)
Previous Name: Twining Laboratories of
Southern California (changed in 2009)
California Employer ID No.: 13259809
Recently, we have provided services similar to this contract and partnered closely with the City's project management team to ensure success. The key to a successful construction project is consistent and prompt communication with the City, which means being available and responsive to any requests. Twining has the daily resources to satisfy the full range of needs required during this project, and we have demonstrated this during all of our past contracts with the City of Santa Clarita, as well as other local municipal clients, such as the cities of Valencia, Thousand Oaks, Agoura Hills, and Simi Valley.

Throughout the southern California region, we employ over 185 inspectors and technicians, more than 80% of whom hold multiple inspection certifications. Our local field staff will adhere to the City's Quality Assurance Program and utilize all required methods for testing and inspections.

We will continue to provide the following exceptional benefits to the City:
» We have served your City for years, providing services identical to this proposal. Our history with your agency, extensive knowledge of the area conditions, and deep understanding of the community ensures a seamless integration of our team with the City's staff.
» We have consistently provided the City with a highly qualified and skilled workforce to help with its projects. Their strong project management skills, along with their technical expertise, have benefited the City by completing the projects under budget with minimum interruption and without compromising the quality of their work and product. » We have a proactive project management approach designed to provide effective solutions to control costs and support the City's efforts to maintain and manage the project's construction schedule by prioritizing timeliness, accuracy, and communication.
» We have consistently maintained our core team of inspectors for this project throughout the years so we can learn from each year of experience and apply that experience to the upcoming projects. Our core team will remain the same this year, so they are in complete sync with the City's team and can fulfill the City's requirements to 100 percent satisfaction.

Twining | City of Santa Clarita - Hydrogen Fueling Station 6

1.1 RESPONSE FILE: SECTION 1.1.2. : EXPERIENCE AND REFERENCES THREE (3) REFERENCES
Client Name Title Contact Information
1) City of Santa Monica Sebastian Felbeck Senior Construction Manager
310 434 2675
2) City of Santa Clarita Ramiro Fuentes Project Manager, Public Works
661 286 4134
Diana Previtire Project Development
Coordinator
661 312 6281
Lisa Campos Project Development
Coordinator
661 286 4025
3) County of Ventura Devi Nallamala Project Manager 805 658 4354 Jon Jacobson Engineering Project
Manager
805 654 2022
805 665 0268

REFERENCES
The following references are clients Twining has provided similar services to within the past five years.

Twining | City of Santa Clarita - Hydrogen Fueling Station 7

The Miller Hull Partnership, LLP
2150 WEST WASHINGTON STREET SUITE #113 SAN DIEGO, C A 92110

SANTA MONICA CITY YARDS

MODERNIZATION
2500 MICHIGAN AVENUE
SANTA MONICA, CALIFORNIA 90404

100% DESIGN DEVELOPMENT

OUTLINE SPECIFICATION
07 FEBRUARY 2019

This project entails a $106 million redevelopment and modernization of an existing 14.7-acre municipal Operations, Maintenance, and Storage Yard. A 60-month-long project, the modernization will be carried out over three phases and include the new construction of six structures, totaling roughly 60,500 square feet of gross space, along with extensive ground improvement. The City Yards Modernization included compressed natural gas (CNG) fueling stations as part of the project scope.

The work will include soil foundation improvements, including the installation of continuous flight auger piles over an existing on-site landfill, retaining walls, a cast-in-place-concrete slab on grade, elevated slabs, steel superstructures, new utility connections, and other concrete site work. Additional work will include cistern installation for gray and rainwater capture, irrigation, lighting, kitchen, landscaping on the property and neighboring property, gasoline and diesel storage tanks, emergency generator, and fire sprinklers.

Twining is serving as the geotechnical engineer of record and is also providing materials testing and inspection services. Our firm’s scope of services includes:
» Geotechnical engineering observation and testing during fill placement for grading of building pads, foundation pile installation, utility installation, pavements, and miscellaneous » Reinforced concrete
» Structural steel (field visual and non-destruct testing NDT – field and shop) » Fabrication shop audit conducted prior to commencement of welding activities » Reinforced masonry
» Welding of photovoltaic framing
» Periodic testing and inspection of post-installed anchors, wedge anchors, and wires Project Timeline - 2020-2024

CITY OF SANTA MONICA
City Municipal Yard Modernization

1.1 RESPONSE FILE: SECTION 1.1.2. : EXPERIENCE AND REFERENCES The following are project that we have performed similar services on within the past five years.

Twining | City of Santa Clarita - Hydrogen Fueling Station 8

1.1 RESPONSE FILE: SECTION 1.1.2. : EXPERIENCE AND REFERENCES Construction of the new Fire Station 34 is underway, located on Avenida de Los Arboles and Mountclef Boule- vard in Thousand Oaks. The building design includes two pull-through engine bays, seven dorms, two offices, a kitchen and dining area, a fitness and day room, four restrooms, and a storage building. The current staffing is a single-engine crew with three firefighters. The building is designed for two engines if additional service is needed to support the community members of Thousand Oaks.

Twining was responsible for providing specialty and daily inspection services for the Fire Station No. 34 project. This included testing and inspection of reinforcing steel, concrete, shotcrete, FRP , soil, asphalt, welding, and seismic anchors.

ADDITIONAL PROJECTS WITH THE COUNTY:
• Ventura County Medical Health Center
• Fillmore Library Addition and Meeting Room
• General Service Fuel Station
• County of Ventura, Fillmore Library Geotech
• County of Ventura, Todd Road Jail Health and Programing Unit • Fillmore Fire Station
• Newbury Park Fire Station No. 35
Project Timeline - 2023-2025

COUNTY OF VENTURA
Thousand Oaks Fire Station No. 34

The City of Santa Clarita's Rink Sports Pavilion project consists of constructing a new 25,701 square foot multi-use sports facility located at the Santa Clarita Sports Complex on the east side of the Gym - nasium. The proposed facility will include fire suppression system, steel framing, metal roofing, CMU shear walls, and roof mounted HVAC systems. The proposed off-site facilities will include improve - ments such as concrete walkways, walkway pavers, various types of ramps and steps, exterior lighting, parking area improvements, first flush basin, landscaping, drainage systems, and extensions and con - nection to the following wet and dry utilities; potable water, fire water, sewer with grease interceptor, electric service, natural gas, and fiber optics.

Twining is providing a variety of tests and inspections including concrete, concrete batch plant, soils, and asphalt. Reinforced masonry, and structural steel field and shop welding.

Project Timeline - 2024- On-Going

CITY OF SANTA CLARITA
The Rinks Sports Pavilion
Gold Coast Transit District (GCTD) had outgrown its existing facilities and wanted to relocate to a new, larger site to accommodate their growing needs. The new 56,918 square foot transit facility includes an administration and operations building, fleet maintenance and repair building, bus fueling station with compressed natural gas (CNG), bus wash and maintenance support facilities, parking, and drainage facilities for GCTD’s fleet of 125 vehicles. The project was completed in late spring of 2020.

Twining is provided quality control materials testing and inspection services to the contractor Icon West. Our services include inspection of reinforced concrete, reinforced masonry, and structural steel field welding.

GOLD COAST TRANSIT DISTRICT
Administration and Maintenance Facility
Twining | City of Santa Clarita - Hydrogen Fueling Station 9

1.1 RESPONSE FILE: SECTION 1.1.2. : EXPERIENCE AND REFERENCES

1.1.3. SCOPE OF WORK

1.1.3.1. PROJECT UNDERSTANDING
We understand the proposed Santa Clarita Hydrogen Station project consists of constructing the new hydrogen station and the two hydrogen transit dispensers. The hydrogen station consists of one rectifier, one electrolyzer, two hydrogen compressors, one compressor chiller and tank, three buffer vessels, twenty-five storage vessels, one valve panel and associated electrical equipment including one backup generator. The transit fueling area consists of two hydrogen dispensers and one dispenser chiller. The project is designed to support future expansion of the hydrogen infrastructure. This project is located at 28250 Constellation Road, Santa Clarita, CA.

We understand there is a 9.19% DBE goal and will be working with DBE certified California Testing & Inspections, Inc. to meet this requirement.

Twining is an accepted testing laboratory that will assign certified technicians and inspection personnel who follow all FTA testing requirements. Our team is very familiar with and follows the City of Santa Clarita Quality Assurance Program (QAP) as provided in the City’s RFP (Exhibit B). Twining’s team will interact professionally with contractors, engineers, elected officials, property owners, business owners, and the public at large, while coordinating with other city personnel; promoting quality customer service; and respond promptly and courteously to requests. We will follow verbal and written instructions, communicate clearly and concisely, both orally and in writing.

TASK 2: SERVICES DURING CONSTRUCTION
SUBTASK 1: Responsibilities
Twining shall be responsible for providing material
testing during construction throughout the duration of
the project
OUTPUT:
» Thoroughly reviewing the approved plans and
specifications to determine the required special
inspections and material testing required during all
phases of construction
» Maintaining a daily log of all special inspections
and material testing activities
» Posting all inspection and testing reports on the
City document management site
» Notifying the City Project Manager and
Construction Manager both verbally and in writing
of any missed inspections, failed inspections, or
test failures
» Scheduling all required onsite and offsite
inspections and testing
Twining | City of Santa Clarita - Hydrogen Fueling Station 10

1.1.3.2. DETAILED STATEMENT OF PROPOSED SERVICES
TASK 1: PRE-CONSTRUCTION SERVICES
SUBTASK: Support to the City's Project Management
Team.

OUTPUT: Twining will provide the following as per
the City's RFP Exhibit D, and shall be responsible for
providing services during the pre-construction phase
of the project, including but not limited to:
» Reviewing approved Plans and Specifications
thoroughly prior to the Pre-Construction meeting
» Coordinating a testing and inspection schedule
with the City
» City’s Construction Management Team and the
contractor.
» Attending the pre-construction conference.
» Develop a list of required material testing activities to successfully complete the project. At minimum,
the list shall include the following:
o Rebar placement
o Structural Steel Welding (onsite & offsite)
o Reinforced Concrete
o Anchors
o High Strength Bolting
o Masonary
o Batch Plant

1.1 RESPONSE FILE:
» Supporting enforcement that General Contractor
properly provides for the safety of the workers
during inspections and material testing activities,
if the Consultant Inspector observes an unsafe
situation, the inspector shall notify the City
Construction Manager and General Contractor of
the violation and provide written notification of
such infraction to both. If the General Contractor
refuses to comply, the Consulting Lead Special
Inspector shall immediately notify the City Project
Manager and City Construction Manager
» Participating in conferences and progress meeting
as requested by the City
SUBTASK 2: As-Needed Special Inspections
Special Inspections will be requested by the Senior
Special Inspector when it is determined that the Senior Special Inspector is not able to provide all required
inspections on a specific date and time. The Senior
Special Inspector will obtain approval to schedule the
As-Needed Special Inspections from the Construction
Manager.

OUTPUT:
» Performing special inspection as instructed by the
Senior Special Inspector
» Ensuring Contractor’s work complies with Contract
Documents and approved contract change orders
» Coordinate all special inspections and material
testing activities with the Senior Special Inspector,
Construction Manager, City Inspector, and General
Contractor
» Maintain a daily log of all special inspections and
material testing activities
» Providing all required inspections and testing as
noted on structural plan sheet S003 and other
sections of the plans and specifications
» Monitoring of corrective actions taken by the
General Contractor needed to fix work that is not in
compliance with Contract Documents
» Scheduling other special inspections and material
testing as needed
» Ensuring Contractor’s work complies with the
Contract Documents and approved contract
change orders
» Posting all inspection and testing reports on the
City's document management site
» Notifying the City Project Manager and
Construction Manager both verbally and in writing
of any missed inspections, failed inspections, or
test failures
» Scheduling all required onsite and offsite
inspections and testing
» Supporting enforcement that General Contractor
properly provides for the safety of the workers
during inspections and material testing activities,
if the Consultant Inspector observes an unsafe
situation, the inspector shall notify the City
Construction Manager and General Contractor of
the violation and provide written notification of
such infraction to both. If the General Contractor
refuses to comply, the Consulting Senior Special
Inspector shall immediately notify the City Project
Manager and City Construction Manager
» Participating in conferences and progress
meeting as requested by the City
» Ensuring Contractor’s work complies with
Contract Documents and approved contract
change orders
» Post all inspection reports on PROCORE
» Support enforcement that General Contractor
properly provides for the safety of the workers
during inspections and material testing activities,
if the Consulting Special Inspector observes an
unsafe situation, the inspector shall notify the City
Construction Manager and General Contractor of
the violation and provide written notification of
such infraction to both. If the General Contractor
refuses to comply, the Consulting Special
Inspector shall immediately notify the City Project
Manager and City Construction Manager.
» Ensure that a Certificate of Compliance / Buy
America Certification is furnished with each lot
of manufactured and prefabricated materials
delivered to the work site. The certified material
on lot number and project number shall be
identified on the certificate and lot tags affixed or
stenciled to the release materials.

TASK 3: SERVICES DURING

CONSTRUCTION CLOSE-OUT
SUBTASK: Twining shall be responsible for providing
services during construction close-out when
requested including but not limited to:

OUTPUT: Presenting the City with a complete close-
out electronic file of work effort performed during
Material Testing and Deputy Inspection services.

Twining | City of Santa Clarita - Hydrogen Fueling Station 11

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK

DESIGN-RELATED GEOTECHNICAL ENGINEERING WORK PLAN
When the need for geotechnical design-related
services arises at the the City, we will provide the
City with a detailed proposal for execution of the
specific project requirements. Based on our under-
standing of the potential projects, we anticipate the
need for the following general scope of services
that are related to design support (i.e., geotechnical
site investigations).

Task 1 – Review Background Information
Task 2 – Coordinate and Perform Field Exploration
Task 3 – Perform Geotechnical Laboratory Testing
Task 4 – Perform Engineering and Geologic Analy-
ses
Task 5 – Prepare a Geotechnical Report
The remainder of this section provides a descrip-
tion of each of the above tasks and our approach to
complete the tasks.

Task 1 – Review Background
Information
Twining reviews available geotechnical
investigation reports and any other geotechnical
information prepared for the site and provided
to us by you, if available. We will also review
historic aerial photography and topographic maps
as well as available published and unpublished
geologic literature contained in our files, including
publications prepared by the California Geological
Survey and the United States Geological Survey.

This task will help evaluate the existing site
conditions so that the field exploration program
can be most efficiently executed while obtaining
the necessary data to provide specific geology and
geotechnical engineering recommendations.

Task 2 – Coordinate and Perform Field
Exploration
Before starting our exploration program, Twin-
ing conducts a field reconnaissance to mark the
locations of our planned subsurface explorations.

We meet with the City to review the locations in
the field to help mitigate the potential to encounter
buried objects or utilities. As required by law, we
will notify Underground Service Alert (USA) of the
proposed subsurface exploration locations at least
48 hours prior to drilling so that conflicts between
the proposed locations and publicly-owned under-
ground utilities can be identified. As directed by the
City, we will also utilize Geovision to further verify
utility locations. Our field exploration may consist
of truck-mounted drilling, hand augering, machine- or
hand-excavated test pits, or a combination of these
efforts depending on specific project requirements.

Additionally, we can provide Ground Penetrating Radar
(GPR) and Cone Penetration Testing (CPT) as needed.

The field exploration programs will be supervised by a
Twining engineer or geologist who will log the surface
and subsurface conditions encountered and obtain
driven and bulk samples for laboratory observation
and testing. Drive samples are typically collected at
approximately 5-foot intervals within the borings using either a Standard Penetration Test (SPT) sampler
or a California Modified sampler. Twining conducts
drilling and sampling in general accordance with
applicable American Society of Testing and Materials
(ASTM) standards. At the completion of the drilling,
we will transport the soil samples to our laboratory.

Immediately upon completion of drilling and sampling,
the borings will be backfilled with soil cuttings
derived from the borings or backfill may be performed
using grout and/or bentonite chips as needed. Upon
completion of the exploration, the locations will
be patched and repaired so that the original site
conditions are restored to the the City’s satisfaction.

Surface mapping in hillside areas will be performed
by a Twining geologist, recording the types of surficial materials exposed at the site, the locations of contacts among different material types, the attitudes of
bedrock features such as bedding and foliation, and
the presence and character of discontinuities such as
faults, joints, or slip surfaces. Where exploration is necessary within designated Earthquake Fault Zones,
fault trenching or other appropriate exploration will
be performed in accordance with the provisions of
Division 2, Chapter 7.5 of the Public Resources Code
and the City regulations. Where active faults are
identified, appropriate setbacks from the fault traces
will be recommended.

With the implementation of stormwater requirements
on most projects in Southern California, Twining can
perform percolation tests for the purpose of estimating the infiltration rate of the on-site soils, if needed.

Percolation testing is performed in general accordance
with the appropriate local procedures. If such services are needed, Twining will work together with the project civil engineer to ensure these needs are met and the
best system of containing stormwater on the site is
implemented.

Twining | City of Santa Clarita - Hydrogen Fueling Station 12

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Task 3 – Perform Geotechnical
Laboratory Testing
Samples obtained from the exploratory borings
are transported to Twining for observation and
testing. Laboratory tests are performed on selected
samples obtained from the borings to aid in the
classification and to evaluate the engineering
properties of the subsurface soils. Typically, the
laboratory tests include some or all of the following,
depending on project needs:
» Moisture and density
» Soil classification testing including #200 wash
sieve and Atterberg limits
» Direct shear
» Consolidation
» Expansion index
» R-Value and CBR
» Corrosivity & Permeability
» Maximum dry density-optimum moisture content
The exact quantities and types of tests depend
on the material types encountered during our
subsurface exploration and the specific project
requirements.

Task 4 – Conduct Engineering
Analyses
The results of our field exploration and
geotechnical laboratory tests are evaluated and
engineering analyses are performed in order to
provide geotechnical recommendations for the
design and construction of the proposed project.

Typically, the following engineering analyses are
performed in support of geotechnical design-
related projects:
» Evaluation of general subsurface conditions and
description of types, distribution, and engineering
characteristics of subsurface materials at the site
» Evaluation of geologic hazards, including site
seismicity, liquefaction and seismic settlement
potential, and preliminary recommendations for
appropriate mitigation measures, if necessary
» Evaluation of historic earthquakes in the region
with magnitudes and distance from the site to the
epicenter
» Evaluation of current and historical groundwater
conditions at the site and potential impact on
design and construction
» Evaluation of the seismic design parameters in
accordance with the California Building Code for
use in structural design
» Evaluation of surficial and deep-seated slope
stability
» Evaluation of the feasibility of using on-site soils
for foundation and fill support
» Development of general recommendations for
earthwork, including site preparation and excavation
requirements, requirements for placement of
compacted fill, and site drainage
» Recommendations for suitable building foundation
systems, retaining wall foundations, and provision of
allowable bearing capacities, associated settlement
estimates, and lateral pressures and resistances
» Recommendations for appropriate infiltration rates for on-site soils for use by the civil engineer in the design of on-site stormwater storage systems
» Evaluation of expansion potential and, if needed,
recommendations to mitigate the potential impact of
expansive soil conditions on the proposed project
» Recommendations for vehicular pavement sections
including rigid and flexible sections
» Evaluation of the corrosion potential of the on-site
earth materials
Task 5 – Prepare Geotechnical Report
After the laboratory testing and engineering analyses
are complete, a report is prepared to summarize the
data collected and present our findings, conclusions,
and geotechnical recommendations for the design and
construction of the proposed project. We will provide
preliminary geotechnical data and recommendations
within 10 calendar days of completion of the field, and we will provide a final report within 15 working days of completion of the field work. The report includes the
following:
» Site location map
» Project Information
» Boring location map and logs of borings that include
summarized laboratory testing results using the
computer program gINT
» Soil classification of the soil materials encountered in accordance with the Unified Soil Classification System
» Seismic Evaluation summary with Seismic
Zone Coefficients and Soil Profile per CBC 2010
requirements
» Review/summary of field and laboratory test
procedures and data
» Geotechnical recommendations for the design and
construction of foundations and grading
» Statement of future site performance in accordance
with the provisions of Section 111 of the the City of Los Angeles Building Code
All services are performed in accordance with the
applicable federal, state, and the City requirements.

Twining provides five copies of the report wet signed and sealed by a licensed geotechnical engineer.

Preparation of Report for Submittal to the Project Team:

We strive to prepare reports that are clear and concise.

As needed, we present the the City with a draft version of our completed report for review and comment by the
project team so that recommendations can be “fine-
tuned” if needed.

Twining | City of Santa Clarita - Hydrogen Fueling Station 13

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Following is our technical approach to providing the requested special inspection and materials testing services, including field and laboratory compaction testing, and plant inspection, for relevant construction materials.

TASK: Soils
The purpose of earthwork observation and testing is
to verify that the work is done in compliance with the
approved plans and specifications, in particular with
the recommendations of the project geotechnical
report. Twining provides the following verification,
testing, and reporting services:

Verification
» Verify materials below the footings are adequate.
» Verify excavations are extended to the proper depth
and have reached the proper material.
» Perform classification and testing of controlled fill materials.
» Verify use of proper materials, densities, and lift
thickness during placement and compaction.
» Prior to placement of controlled fill, observe
subgrade and verify that site has been prepared
properly.

Testing
» Subgrade materials, native-fill materials, imported
materials, and additive materials are delivered to the
laboratory for testing.
» Soils testing technician performs soils classification and properties tests on native and/or imported soils.
» Performs laboratory moisture-density relationship
tests or other structural property tests.
» Conducts laboratory testing to determine soils’
properties resulting from admixtures such as cement
or lime, as applicable.
» In the field, conduct in-place field density and
moisture tests.
» Periodically sample materials in the field to
verify continued compliance with specifications
requirements.

Reports
Progress reports are submitted describing the tests
and observations made and showing the action taken
to correct nonconforming work.

Task: Asphalt Concrete
The purpose of observation and testing of Hot Mix
Asphalt (HMA) and Rubberized Hot Mix Asphalt
(RHMA) paving is to verify that paving contractors
exercise adequate quality control of their operations
and are providing a finished product that complies
with the project plans and specifications. Adequate
sampling is also required in accordance with the
Quality Assurance Plan.

Sampling
» Sample and perform preliminary tests on pro-
posed aggregates and asphalt cement to verify
Job Mix Formula.

Subgrade and Base
» Confirm that sources of materials have been
sampled and approved.
» Verify that materials delivered are of uniform
quality.
» Verify that control testing of subgrade materials
is being performed and recorded.
» Verify that subbase and base courses are of the
source, type, thickness, and density specified.
» Verify that soil stabilization is provided.

Plant
» Inspector familiarizes himself with the
appearance and physical characteristics of the
mix so that unsatisfactory conditions may be
readily recognized.
» Check the plant facilities prior to production of
HMA or RHMA.
» Check aggregates in the stockpile to verify con-
formance to materials utilized in the design.
» Check the temperature and weights of the aggre-
gate fractions and asphalt cement.
» Check the mixing temperature and the tempera-
ture of the mixed batches on the truck.
» Conduct sampling of the asphalt cement and
blended aggregates to verify the JMF is within
tolerance.
» Before loading, truck beds are checked for clean-
liness and the absence of materials that might be
detrimental to the mix. Ensure trucks are tarped
after loading.
» Coordinate with job site inspector to obtain a
uniform and consistent HMA.

Spreading and Paving
» Field inspector contacts the plant inspector
immediately if observed conditions during place-
ment and spreading suggest a need for a change
at the plant. The following items are addressed
prior to and during placement:
» Area is to be paved, cleaned, crack sealed, and
properly primed or tack coated.
» Leveling source installed where required.

TWINING'S DETAILED SERVICES WORK PLAN & APPROACH
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1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
» Suitability of spreading and paving equipment.
» Ambient and base temperature noted.
» Mix temperature when delivered, during, and after
final rolling is within limits.
» Density tests by nuclear gauge during rolling
» Thickness control by adequate placement and com-
paction.
» Sampling of HMA and RHMA at the jobsite during
placement for laboratory testing.
» Core samples are taken for verification of thickness
and in-place density of the mat.
» Application of seal coat and curing.

Verification
» Stability and air voids.
» Asphalt content and gradation by extraction.
» Physical properties of the asphalt cement:
penetration, viscosity, softening point, resilience,
ductility, and specific gravity.
» Aggregate quality: gradation, LA abrasion, and equiv- alent, fractured faces, uncompacted voids, etc.
» Thickness and field density of core samples.
» Smoothness tolerance.

Reports
Reports are submitted describing the observations
made and showing the action taken to correct noncon-
forming work, including itemized changes authorized
by the architect/engineer. All deviations from plans or specifications are reported.

Task: Reinforcing Steel
The purpose of reinforcing steel observation is to give assurance that the supplier is exercising satisfactory
control over the production, fabrication, and placing
of reinforcing steel so that it meets the project
specifications, applicable codes, and industry standards.

Twining provides the following observation duties:

SUBTASKS:

Mill Test Reports
» Verify reinforcing steel mill test reports for mill
markings and test data.
» Sample material for tests directly from unopened
bundles.

Fabrication
Check each shipment of reinforcing steel for the
following:
» Bar sizes and grades are as specified.
» Mill marking is in conformance with mill test reports. » Corrosion, contaminants, surface cracks, and bars
damaged in shipment.
» Shop bends for specific radius and cracks.

Placement
» During placement of reinforcing, check for proper
bar locations, alignment, laps, ties, form and
ground clearance, supports, field bend radii and
cracks, gouges or tack welds causing stress
concentrations, removal of contaminants, and
hardened concrete.
» If welding of the reinforcing steel is required, it
should be observed with particular emphasis on
joint configuration, suitability of low hydrogen
electrodes, preheat and interpass temperatures,
and interpass slag removal.
» Prior to concrete placement, check for complete
installation and notify the contractor of any
variations from plant and specifications.
» During concrete placement, check that reinforcing
stays in place and is adequately supported.

Check for removal of dirt, concrete spatter,
grease, etc.
» Check embedded items for compliance with
project documents.

OUTPUT: Reports
Progress reports are submitted describing the
tests and observations made and showing the
action taken to correct nonconforming work. Any
changes authorized by the architect/engineer are
itemized. All uncorrected deviations from plans or
specifications are reported, as well.

Task: Concrete Batch Plant
The purpose of batch plant observation is to verify
that the concrete supplier is exercising adequate
quality control to produce concrete that will meet
the project requirements for materials, their
batch proportions, and mixing and adjustment
for moisture. Twining performs the following
observation duties:

SUBTASKS:

Equipment
» Check the trucks for worn out or damaged fins for
the excessive buildup of hardened concrete and
for the presence of wash water from the previous
delivery.
» Check the National Ready-Mix Concrete
Manufacturers Association truck rating plate and
verify that the load capacities are not exceeded.

Check the current “weights and measures” seal
on scales.
» Verify that the moisture metering device is
operable.
» Verify that the scales start at and return to zero
after each weighing operation.
» Verify that the metering devices for admixtures
have been calibrated.

Twining | City of Santa Clarita - Hydrogen Fueling Station 15

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Materials, Storage, Handling
» Visually check the sand and coarse aggregate for
the method of storage, handling, source, grading,
cleanliness, and moisture condition.
» Obtain samples of aggregates, when specified.
» Obtain grab samples of cement and pozzolanic
materials, when specified.
» Check cement temperature.
» For lightweight aggregates, check loose moist
unit weight regularly and verify whether the plant
is making proper adjustments to batch weights to
compensate for variations in weight as well as in
moisture.

Batching of Materials
» Record the volume of cubic yards for each class of
concrete delivered.
» Verify that the specified materials are dispensed to
the weight hopper and record the adjusted batch
weights.
» Verify that the proper adjustments have been made
for variations in moisture of aggregates.
» Record the mixing time and check whether it is
sufficient.
» Visually estimate the slump of the concrete and
report immediately to the operator any slumps
outside the specified tolerance.
» Coordinate with the job site and verify the “as
delivered” slump, air content, unit weight, mix
temperature, general workability, and preparation of
test samples.

OUTPUT: Reports
Twining submits progress reports describing the tests
and observations made and showing the action taken
to correct nonconforming work. The reports itemize
any changes authorized by the architect/engineer and
all uncorrected deviations from plans or specifications.

Task: Concrete
Quality assurance for concrete is divided into two
phases. The first involves collecting evidence from
standard tests to verify that the delivered concrete
was produced to the standards specified. The second
involves verifying that the proper construction practices are followed during placement, finishing, and curing.

Twining performs the following observations, sampling,
and testing duties:

SUBTASKS:

Observation
» Verify form-work is of proper size and shape.
» Verify that the location and preparation of
construction joints are in compliance.
» Check forms for cleanliness and proper
treatment prior to placement.
» Visually estimate the slump of each batch
delivered and perform slump tests regularly.
» Determine concrete temperature, number of
mixing revolutions, and/or length of time since
batching.
» Observe placement procedures for evidence of
segregation, possible cold joints, displacement
of reinforcing or forms, and proper support of
embedded items, anchor bolts, etc.
» Observe methods used for compaction/
consolidation.
» When specified, verify that concrete is protected
from temperature extremes and that proper
curing is initiated.
» When specified, verify the maintenance of cure
temperatures and techniques.

Sampling and Testing
» Sample and test fresh concrete for the following
(or as stipulated by plans and specifications):
» Slump
» Temperature
» Entrained air, when required
» Wet unit weight, when required.
» Sample concrete and prepare test cylinders in
accordance with ASTM C31.
» Field sampling and testing of concrete will be
performed by a qualified technician, certified by
ACI as a Concrete Field-Testing Technician –
Grade 1 (or approved equal).

OUTPUT: Reports
Twining submits progress reports describing the
tests and observations made and showing the action
taken to correct nonconforming work. The reports
itemize any changes authorized by the architect/
engineer and all uncorrected deviations from plans
or specifications.

Task: Masonry
The purpose of special observation for masonry is
to verify that the workmanship and materials meet
the minimum standards required by code and by the
approved project plans and specifications. Twining’s
special inspector provides the following observation
duties:

SUBTASKS:

Documents
» Review the approved plans, specifications,
and Statement of Special Inspections with
the masonry contractor and architect’s
representative in a preconstruction meeting.

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1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
» Verify whether high lift or low lift procedures have
been approved and documented for use.

Mill Test Reports
» Verify that mill test certifications for unit masonry, cement, reinforcing steel, and embedded anchors
have been furnished by the supplier and are
acceptable to the architect/engineer.

Sampling of Materials
» Sample and verify that the following materials are
delivered to the laboratory for testing when required:
» Concrete block or brick
» Aggregates and cement for mortar and grout
» Reinforcing steel as delivered
Storage of Materials
» Verify cement, lime, block, and brick are supported
on pallets and covered to protect from exposure to
excessive moisture or drying.
» Verify aggregates for mortar and grout are stored
free from contamination and in such a manner as to
minimize segregation.
» Verify reinforcement, ties, and metal accessories
are stored off the ground and in a manner to prevent
permanent distortions.

Preparation for Lay-Up
» Verify the size and spacing of the reinforcing dowels. » Verify the length of the dowel protruding from the
footing is of sufficient length to allow for the splicing of vertical reinforcing steel as required.
» Verify that foundation concrete is clean and prepared as required by specifications.

Lay-Up or Placing of Masonry Units
» Verify that clean-outs are provided for the first course of each pour if the high lift method is used.
» Verify plumb and lay-up configuration.
» Verify moisture condition of masonry units.
» Verify that proper mortar ingredients and batching
techniques are being used and prepare mortar
compression test specimens.
» Verify mortar time on board.
» Verify that head joints are the same thickness as
face shells or that full head joints are used when
specified.
» Verify that mortar extrusions (fins) are cleaned off
inside.
» Verify whether joints are tooled as specified.
» Verify required frequency of masonry wall prisms and
observe the construction of same as specified.
» Observe horizontal and vertical reinforcing steel to
verify:
» Reinforcing steel is of specified size and grade.
» Reinforcing steel is located and spliced as specified. » Lap splices are staggered in bond beams and
corners as required.
» Hooks are specified size and bent as required.
» Ties are specified size, spacing, and bent as
required.
» Reinforcing steel is properly secured and
minimum clearances are as required.
» Verify embedded items are:
» Placed at the proper location and secured.
» Proper size and clearances are as required.
» Verify masonry is protected from the weather:
» When ambient or CMU temperature falls below
40°F.
» When the ambient temperature exceeds 100°F or
90°F (wind velocity greater than 8 mph).

Pre-grouting Tasks
» Verify that cells and starting beds are clean.
» Verify dowels, anchor bolts, and inserts are all
in place, particularly at roof lines, floor lines, and
intersecting wall lines.
» Verify installation of cleanout closures.

Grouting Observations
» Verify grout mix for conformance to the approved
mix design.
» Verify slump is in accordance with the
specifications.
» If low lift grouting, verify maximum masonry
height is in accordance with the code before
grouting.
» Verify consolidation (mechanical vibrating or
puddling) during placement, and later during
reconsolidation.
» Monitor time since batching of grout.
» Monitor flow of grout throughout the wall and
each grout pour height for conformance to
specifications.
» Preparation of any required grout specimens
and/or prisms shall be observed. Note mortar
specimens are no longer required.
» Verify grout is stopped below the top for keying
where required.
» Verify curing requirements are being followed.

OUTPUT: Reports
Twining submits written progress reports describing
the tests and observations made and showing
the action taken to correct nonconforming work.

The reports itemize any changes authorized by the
architect/engineer and all uncorrected deviations
from plans or specifications.

Twining | City of Santa Clarita - Hydrogen Fueling Station 17

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Task: Structural Steel
The purpose of structural steel inspection is to assure that proper quality control is exercised at the fabrication location and in the field, despite variations in the
environment. Twining provides the following observation duties:

SUBTASKS:

Mill Test Reports
» Review mill test reports and check heat numbers with
material as received. Verify that proper identification of steel is maintained during fabrication.

Sampling and Testing
» When required by project specifications, mark
sample location with a steel stamp on each piece
tested.
» Record sample number and location and check that
sample identification is maintained as samples are
delivered to the laboratory and tested.
» When steel members are delivered to finish length
and no “crop ends” are available for sample cutting,
and coordinate cutting and patching requirements
with the architect/engineer and fabricator.

Welding Observation (Applicable to Shop and
Field)
» Check all welders’ certifications and verify that they work only as covered by their certification.
» Keep a written record of all welders by name,
their identifying steel mark, and the percentage of
rejectable welds.
» Upon detection of a rejectable weld (either visually or by nondestructive test), the inspector will notify the
foreman for verification of the defect. The inspector
will observe the removal of defects and repairs to
check whether acceptable procedures were used.
» Inspect joints for proper preparation, including bevel, root faces, root opening, etc.
» Check the type and size of electrodes to be used for
the various joints and positions. Check the storage
facilities to see if they are adequate to keep the
electrodes dry.
» Observe the technique of each welder periodically
with the use of a welding inspection shield.
» Verify the use of Welding Procedure Specifications
(WPS).
» Observe multi-pass welds continuously.
» Continuous observation is defined as follows: The
inspector is present in the welding area at all times.

The extent of inspection of individual welds will
depend on the number of operators welding.
» Observe single pass fillet welds periodically (in
accordance with CBC Section 1704.3.2), after
determining that the operator is capable of
producing the welds required.
» If straightening or restraining of weldments is
necessary, verify that approved methods will be
used.
» Tag or stamp accepted weldments with the
inspector’s identification stamp.

Workmanship
» Check straightening and bending procedures.
» Check cut edges, including those flame cut,
sheared, or milled.
» Check bolt holes for diameter size in major
connections.

Additional Duties (if required)
» Verify that the welding sequence complies with
approved construction documents.
» Check steel frame joint details for compliance
with approved construction documents, including
details such as bracing and stiffening, member
locations, and application of joint details at each
connection.
» During adverse weather conditions, check that
adequate steps are taken to prevent moisture
penetration at the welding location.

OUTPUT: Reports
Twining submits progress reports describing the
tests and observations made and showing the
action taken to correct nonconforming work. The
reports itemize any changes authorized by the
architect/engineer and all uncorrected deviations
from plans or specifications.

Task: High Strength Bolting
The purpose of high strength bolting observation
(continuous or periodic) is to provide assurance
that the proper bolt type(s) and installation
procedures are used to meet the project
specifications and applicable codes and industry
standards. Twining provides the following testing
and inspection services:

SUBTASKS:

Mill Test Reports
» Review mill test reports and check identification
markings with material as received.

Sampling and Testing
» Sample high strength bolts, washers, and nuts for
testing from the lots in the shop or on the jobsite,
if required.
» Record sample information from each lot and
check that sample identification is maintained
as samples are delivered to the laboratory and
Twining | City of Santa Clarita - Hydrogen Fueling Station 18

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Twining | City of Santa Clarita - Hydrogen Fueling Station 19 tested.

High Strength Bolting Observation
» Review type of joint specified (i.e., slip-critical,
bearing-type).
» Check bolts, nuts, and washers for compliance to
project specifications.
» Review the procedure for the installation of bolts.

The amount and type of inspection during installation
will depend on the method used (i.e., turn-of-nut
calibrated wrench, twist-off bolts, direct tension-
indicator washers).
» Check joint surfaces to verify that they are free of
burrs, dirt, etc.
» Observe preinstallation testing and calibration
procedures when required.
» patching requirements with the architect/engineer
and fabricator.

The extent of inspection of individual welds will
depend on the number of operators welding.
» Observe single pass fillet welds periodically (in
accordance with CBC Section 1704.3.2), after
determining that the operator is capable of producing
the welds required.
» If straightening or restraining of weldments is
necessary, verify that approved methods will be
used.
» Tag or stamp accepted weldments with the
inspector’s identification stamp.

Workmanship
» Check straightening and bending procedures.
» Check cut edges, including those flame cut,
sheared, or milled.
» Check bolt holes for diameter size in major
connections.

Additional Duties (if required)
» Verify that the welding sequence complies with
approved construction documents.
» Check steel frame joint details for compliance
with approved construction documents,
including
» Verify all plies of connected materials have been
drawn together and properly snugged.
» Monitor the installation of bolts to verify the
selected installation procedure is properly used
to tighten bolts.
» For joints requiring only snug-tight conditions,
verify connected materials have been drawn
together and properly snugged.

OUTPUT: Reports
Twining submits written progress reports
describing the tests and observations made
and showing the action taken to correct
nonconforming work. The reports itemize any
changes authorized by the architect/engineer
and all uncorrected deviations from plans or
specifications.

Task: Non-Destructive Testing (NDT)
The purpose of nondestructive testing is to verify
that structural steel and/or completed welds are
sound with respect to the given project criteria.

Twining’s NDT inspectors provide the following
observation duties:

SUBTASKS:

Personnel
» All NDT personnel shall be qualified in
accordance with the American Society for
Nondestructive Testing, Recommended Practice
SNT-TC-1A, (also CP189) and the supplement
applicable to the method to be used. Only Level
II and III inspectors, or Level I inspectors working
under the direct supervision of a Level II or III
inspector, are permitted to conduct the tests.

Method Selection
» Method to be used shall be as prescribed by
project specifications, building codes, or as
recommended by the materials engineering
laboratory under the direction of the design
professional.

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Twining | City of Santa Clarita - Hydrogen Fueling Station 20 » Effective use of NDT depends on utilizing the proper
test method and techniques. Where field conditions
or sequences affect the specified methods, the
materials engineering laboratory will contact the
project architect or engineer for suitable approved
methods or techniques.

Tests
» Perform tests as prescribed by contract documents,
for welds, laminations, or lamellar tearing.
» Upon detection of a defect, mark the defect and
notify the foreman.
» Keep written records of pieces, welds, welder
identification marks, length and location of defects,
method and date of repair, number of retests, records
of performance of each welder (percent of rejected
welds), and sampling rate.

Standards
» Many non-destructive testing standards and codes
are presently available for information and reference.

Most standards and codes specify equipment and
personnel requirements, operational steps, and
acceptance standards tied to the end-use function.

Following is a partial list of the more common
standard test methods.
» Radiography—AWS D1.1, ASTM E94 and E99,
ASME Section V.
» Ultrasonic Testing—AWS D1.1, AWS D1.8, ASTM
E164, ASME Section V.
» Magnetic Particle Testing—ASTM E109, ASME
Section V.
» Penetrant Testing—ASTM E165, ASME Section V.

OUTPUT: Reports
» Progress reports are submitted describing the tests
and observations made, their location, and any
corrective actions taken. Reports include the current
percent of rejectable welds.

TASK: Post-Installed Anchors and
Dowels
Twining provides the following observation and testing
services:

Observation Duties for Anchor/Dowel
Installation
SUBTASKS:

Materials
» Verify brand or manufacturer of the anchor.
» Verify brand or manufacturer of the epoxy or grout.
» Verify the expiration dates on epoxies.

Sampling of Materials
» If required sample the materials in accordance with
specified standards required.
» Refer to the material engineering laboratory for
direction in sampling procedures and specimens.

Observations Procedures
» Identity the substrate as standard concrete,
lightweight concrete, CMU, or brick.
» Report the design strength of the concrete and age
if known.
» Report the orientation of the hole.
» Check the anchor for size (diameter) and length
» Check the epoxy for approved use
» Check epoxy is proper for application
» Verify drill or core size meets manufacture specs
» Check diameter of hole and depth of holes
» Check cleanliness of hole
» Check holes spacing for compliance to
specifications
» Check holes after placement of inserts to verify
fullness of epoxy contact.
» Record ambient temperature and note if outside of
specified range.

Observation Duties for Proof Load
Testing of Installed Anchors/Dowels
Materials
» Record the type of anchor system and epoxy
reported as being used, and identify the source
of this information. The anchor system cannot be
verified unless the installation was witnessed.

Observations Procedures
» Record the proof load equipment being used: rams,
gauges, torque wrenches.
» Verify the proof load equipment has been
calibrated and record the expiration date if
available.
» Identify any proof loading fixtures being used (load
frames) and how they were set up.
» Describe the anchor type, make, and model
reported including diameter and length.
» Record the testing location within the structure.
» Record the proposed use of the anchor.
» Record the quantity of anchors tested (passed and
failed).
» Record the quantity of anchors that were retested
(passed and failed).
» Record the percent anchor tested within that
particular location of the structure.
» Anchors which fail need to include remarks
indicating what is being done about them in the
future.
» Record how the tested anchors were marked
(pass–green, fail–red) or not.

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Twining | City of Santa Clarita - Hydrogen Fueling Station 21 » Identity who was notified of the results of the
testing.
» Identify where the specified test loads were
obtained.

OUTPUT: Reports
Twining submits progress reports describing
the tests and observations made and showing
the action taken to correct nonconforming work.

Twining itemizes any changes authorized by
the architect/engineer. Report all uncorrected
deviations from plans or specifications.

Task: Fire-Resistant Materials –
Sprayed
The purpose of spray-applied fire-resistant
materials observation is to verify that the
application of material is in accordance with
the project specifications, applicable codes, and
manufacturer’s recommendations. Twining’s
fireproofing inspector provides the following
observation and testing:

Observation Procedures
» Verify substrate condition for cleanliness prior to
application.
» Verify application in accordance with code,
referenced standard, and specifications.

Testing and Sampling Duties
» Measure the thickness of spray-applied
fire-resistive material in accordance with
specifications, CBC Section 1704.10 and AWCI
12-A.
» Remove and deliver samples to the materials
engineering laboratory for unit weight tests.
» Perform cohesive/adhesive bond strength tests
per ASTM E736.
» Re-inspect areas repaired due to insufficient
thickness or damage by sampling, tenant
improvements, panel placement, rain, etc. (This
work must be scheduled and coordinated by the
general contractor.)
OUTPUT: Reports
Twining submits progress reports describing the
tests and observations made and showing the
action taken to correct nonconforming work. The
reports itemize any changes authorized by the
architect/engineer and all uncorrected deviations
from plans or specifications.

Task: Fire-Resistant Materials –
Mastic & Intumescent
The purpose of mastic and intumescent fire-
resistant coatings observation is to verify that the

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
application of material is in accordance with the project specifications, applicable codes, and manufacturer’s
recommendations. Twining’s fireproofing inspector
provides the following observation and testing duties:

Observation Procedures
» Verify substrate condition for cleanliness prior to
application.
» Verify application in accordance with code,
referenced standard, and specifications.

Testing Duties
» Measure the thickness of mastic or intumescent
coating in accordance with specifications, CBC
Section 1704.11 and AWCI 12-B.
» Re-inspect areas repaired due to insufficient
thickness or damage by sampling, tenant
improvements, panel placement, rain, etc. (This work
must be scheduled and coordinated by the general
contractor.)
OUTPUT: Reports
Twining submits progress reports describing the tests
and observations made and showing the action taken
to correct nonconforming work. The reports itemize
any changes authorized by the architect/engineer and
all uncorrected deviations from plans or specifications.

Twining | City of Santa Clarita - Hydrogen Fueling Station 22

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
We assume a local to Southern California steel fabricator.

No overtime, re-inspection or retesting of non-conforming material has been taken into consideration 4- and 8-hour minimums will be invoiced for dispatch technicians and inspectors.

1.1.3.3. ASSUMPTIONS OR CONSTRAINTS
Here is the estimated time schedule for each proposed task. We have no control of dates and times, this is driven by the general contractor.

1.1.3.4. SCHEDULE
Description of Work Personnel Involved Anticipated
Days
Anticipated
Hours
Division 2: Site Construction
Trench Between Fuel Lanes and Compound Soils Technician 17 136 H2 Equipment Compound Soils Technician 20 160
Site Improvements, Asphalt and Misc. Soils Technician 15 120 Document Review / Project Oversight Registered Geotechnical Engineer - 6 Oversight, RFIs, Final Soil Approval, Project Support Project Engineer / Manager - 25 Division 3: Concrete
Rebar / Concrete Placement / Reinforced Concrete Special Inspector - ICC 5 40 Drilled In Anchors Special Inspector - ICC TBD 32
QC Sampling / Flatwork Concrete ACI Technician 12 96
Batch Plant Quality Control Concrete ACI Technician 2 16 Oversight / Report Review Project Engineer / Manager - 14 Sample Pick Up Driver - 10
Division 4: Masonry
Trash Enclosure (If Required) Special Inspector/ ICC - Masonry - 24 Oversight / Report Review Project Engineer/Manager - 2
Sample Pick Up Driver - 2
Division 5: Metal
Shop Fabrication
Shop Fabrication Inspection (DBE Sub-Consultant) AWS Certified Welding Inspector 10 80 Shop Fabrication Inspection Nondestructive Testing Technician - 4 Oversight / Report Review Project Engineer/Manager - 8
Field
Shop Fabrication Inspection (DBE Sub-Consultant) AWS Certified Welding Inspector 10 80 Shop Fabrication Inspection Nondestructive Testing Technician - 4 Oversight / Report Review Project Engineer/Manager - 8
Twining | City of Santa Clarita - Hydrogen Fueling Station 23

1.1 RESPONSE FILE: SECTION 1.1.3. : SCOPE OF WORK
Our Project Manager Jeff Tawakoli, PE, and
Brandan Mathis our Lead Special Inspector will
work directly with the City Project Manager,
Construction Manager, and General Contractor
to draft a work plan for the required special
inspections and material testing. Twining
understands that it is assumed the majority of the
special inspections and material testing will take
place during the construction, requiring the Senior
Special Inspector to have a dedicated presence
at the project site during this time period Twining
will provide requested services to assist the
City’s project management team to successfully
complete the project and protect the interest of the

1.1.3.5. REPORTING AND COMMUNICATIONS
We have provided detailed descriptions of the
reports to be provided in section 1.1.3.2. with
our statement of services. In addition, Twining
has invested in an electronic cloud-based project
management systems to ensure that we are
prepared to meet the needs of your projects.

Twining offers real-time reporting solutions for
both our field inspections and laboratory test
results. Our field inspectors utilize a paperless,
email-based field reporting system accessible
on their smartphones or tablets, which allows for
rapid report turnaround. This system removes the
potential for human error, omitting the possibility
for lost reports or missing or incorrect project
What you get and how it gets to you
Our e-reporting process is straightforward and works
as follows:
» Daily reports are filled out in the field electronically on Twining’s proprietary digital testing form
» The completed report is emailed automatically to
Twining’s project manager who will review it
» After review, the electronic reports are submitted via email (or other specified options) on a daily basis
to a distribution network identified at the project’s
kickoff
Twining has a long history providing the relevant
experience overseeing the construction of projects
in similar scope and complexity to the City’s project
and in all other technical areas listed in the project
information section of this proposal, as well as all
relevant requirements of the current applicable
jurisdictions, codes, and regulations, State and City
building and fire requirements, State of California
Building Code Title 24, and Americans with
Disabilities Act, etc. The selected firm/consultant
shall be knowledgeable on the Standard Construction
Specifications Institute (CSI) format specifications.

1.1.3.6. PROJECT MANAGEMENT

Laboratory Manager
Boris Stein, DSc
Technical Advisor, Concrete
Amir Ghavibazoo, PhD
Technical Advisor, Asphalt
Liangcai He, PhD, PE, GE
Chief Geotechnical Engineer
Robert Ryan, ASNT Level III
Technical Advisor, Steel
Yiwen Bu, PhD, PE, LEED AP
Concrete Laboratory Engineer
Technical Experts *
Laboratory Technicians
Client Representative
Michael Molina
Engineering &
Geotechnical Oversight
Paul Soltis, CE, GE
Jon Browning, PG, CEG
Project Manager/ Quality
Control Manager
Jeff Tawakoli, PE
Brandan Mathis - Lead
Axel Norouzian
Peter Kim
Christian Barroso
+185 other inspectors and technicians
Multi Carded Inspectors
Technicians work staggered hours
to help ensure timely turnaround of
laboratory testing.

Principal In Charge
Linas Vitkus, PE, GE
California Testing and Inspection, Inc.

Structural Steel Shop Fabrication
Glenn Taylor
Resume available upon request
Firm’s principal contact
*
Organizational Chart & Commitment to Team
The staff shown here are committed to the project. Our deputy inspectors will be registered with the City’s Division of Building and Safety before stepping foot on the job site.

Twining | City of Santa Clarita - Hydrogen Fueling Station 24 DBE Subconsultant

1.1.4. PERSONNEL, EQUIPMENT AND

FACILITIES

1.1 RESPONSE FILE:

ICC CertificationsICC Certifications
NAME
ACI
RC
PC
SM
SW
HSB
FP
S
MSI
CBI
NDT II
AWS
W/Twining
Exp. Years
Brandan Mathis (Lead) l l l l l 14 24
Peter Kim l l l l l l 5 45
Inspectors provided by our DBE Subconsultant California Testing & Inspections Junior Alamilla l l N/A 24
Robert Menes l l l l l l N/A 20
Additional Twining resources to back up Brandan and Peter as needed.

Bryce Newman l l l 3 6
Nathan Johnson l l l l l l l l 8 25
Axel Norouzian l l l l l l l l l l l 15 16
Christian Barroso l l l l 2 16
LEGEND
ACI = ACI Field Technician Grade 1 FP = ICC Fireproofing RC = ICC Reinforced Concrete S = ICC Soils
PC = ICC Prestressed Concrete MSI = ICC Master of Special Inspection SM = ICC Structural Masonry CBI = ICC Commercial Building Inspector SW = ICC Steel Welding NDT II = Nondestructive Testing
HSB = ICC High Strength Bolting AWS = American Welding Society (CWI) l = Meets experience and certain certification criteria Proposed Inspector Matrix
In compliance with Exhibit D inspections, all our proposed Multi-Carded Inspectors are familiar with overseeing projects across Southern California. Their accumulated expertise will be a valuable addition to the team, contributing by conducting thorough testing and inspections. They will maintain communication with the City's project management staff and collaborate seamlessly with the professional team.

SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES
Project Management
Project Manager, Jeff Tawakoli, PE, will serve as the primary point of contact with the City. All of our services will be seamlessly coordinated by Jeff and communicated to the City without delay. As our designated point of con- tact, Jeff will oversee all services provided by Twining and verify the City has the necessary resources to respond to each task assignment. He will be familiar with each assignment and will work closely with the City's project manager to ensure all project needs are met and the City is completely satisfied with every aspect of Twining’s performance.

Jeff will review all invoices and reports prior to their issuance and will guarantee the accuracy and timeliness of all. He will be available to the project team members to answer questions or make suggestions, will keep the City informed of budget status, will work with the project team to reduce costs, and will support the delivery of our Twining | City of Santa Clarita - Hydrogen Fueling Station 25

1.1 RESPONSE FILE:

SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES

LINAS VITKUS, PE,GE
Project Executive | Principal-In-Charge
Linas Vitkus, PE, GE is our project executive responsible for providing executive level project management and technical oversight of soil and materials testing and inspection services. His experience includes the management of geotechnical and materials testing services on projects from the initial planning and conceptualization phase to final design and construction. In addition, Linas serves as Twining’s Chief Operating Officer, Linas is responsible for the overall operational management of all Twining’s offices and laboratory operations.

Overview
» Years’ Experience: 1999 – Present
Education
» BS, Civil and Environmental
Engineering, University of California
- Los Angeles, Los Angeles,
California, 1999
Current Licenses Held
» Professional Civil Engineer,
California PE 63163
» Professional Geotechnical Engineer,
California GE 2816
» Professional Engineer, Florida PE
84048
» Nuclear Gauge Certified
**Relationship and cost to the
proposed project activities are outlined
in the "Cost Proposal" section of this
RFP response.**
William S. Hart Union High School District, Castaic High School This $75 million project consisted of the construction of 11 buildings, including administrative, gymnasium, performing arts, food service, library, storage, technology and classrooms. The District constructed approximately 250,000 square feet of buildings on this campus.

Castaic High School opened in Fall 2019 as one of the most scenic high school campuses in California. Twining provided a full range of testing and inspection services on this project including soils, concrete, and masonry. Timely DSA closeout was achieved. Linas served as the Principal-In-Charge.

Ventura County Medical Center
The existing Ventura County Medical Center Hospital has been replaced to meet state seismic standards and to enhance the hospital’s ability to deliver high quality of service to the community. Twining provided geotechnical engineering services, materials testing, and inspection services. Linas served as Project Executive.

City of Santa Clarita, Pool Resurfacing
The project consisted of providing geotechnical inspection, materials testing and specialty inspections for Santa Clarita's Public Works Department located in the city of Santa Clarita, California. The project included performing shotcrete inspection and sampling, coring of the shotcrete panel, laboratory testing, sample pickup, attending meetings, data and final reporting, invoicing and other as needed inspections and testing. Linas served as Project Executive.

City of Santa Clarita, Old Town Newhall Parking Structure The City’s first Design-Build project, the project consisted of the new construction of a 24,200-square-foot, 376 stall, six-story concrete parking structure. Twining performed materials testing and inspection services on this project. Linas served as Project Executive.

County of Ventura, Erringer Fire Station #47
The project consisted of the construction of a 7,000 square foot, single-story fire station with associated site improvements on a 2.45 acre vacant site in Simi Valley. Twining’s scope of services included providing quality control material testing and inspections services.

Linas served as Project Executive.

Twining | City of Santa Clarita - Hydrogen Fueling Station 26

1.1 RESPONSE FILE:

JEFF TAWAKOLI, PE
Project Manager/Quality Control Manager
Jeff Tawakoli, PE, is a professional engineer with over 36 years of experience in geotechnical and construction materials engineering. He has served as a local resource in similar capacity on this contract for the past several years. Jeff’s areas of expertise includes subsurface investigation, engineering analysis, preparation of soils reports, building and roadway inspection and engineering, and project management. He has provided geotechnical engineering support for public works programs, industrial and residential developments, military facilities, roadways, and mid-rise buildings.

Overview
» Years’ Experience: 1988 –
Present
Education
» BS, Civil Engineering, University
of Utah
Current Licenses Held
» Professional Engineer, Civil, CA,
51883
» ICC Reinforced Concrete
» ICC Structural Masonry
» ICC Fireproofing
**Relationship and cost to the
proposed project activities are
outlined in the "Cost Proposal"
section of this RFP response.*
City of Santa Clarita, Old Town Newhall Parking Structure The City’s first Design-Build project, the project consisted of the new construction of a 24,200-square-foot, 376 stall, six-story concrete parking structure. Twining performed materials testing and inspection services on this project. Jeff served as the Project Manger and directly oversaw the firm’s services.

City of Santa Clarita, Copper Hill Park Restrooms
The project consisted of construction of a new restroom building at Copper Hill Park and connection to an existing sewer main line in the street. Twining performed materials testing and inspection services on this project. Jeff served as the Project Manger.

City of Santa Clarita, Newhall Ranch Road Bridge Widening The City of Santa Clarita widened the Newhall Ranch Road Bridge over San Francisquito Creek to four lanes in each direction with a raised median, barrier protected raised sidewalk on the north side, and barrier protected sidewalk and multi-use path on the south side.

Twining provided quality assurance construction materials testing and inspection services along with geotechnical support. Jeff served as the Project Manger.

City of Simi Valley, West Los Angeles Avenue Widening
The project consists of the widening of a segment of West Los Angeles Avenue to add bike lanes, along with curbs and gutters. Additional features of the project include the addition of retaining walls and storm water drains. Twining is providing quality assurance construction materials testing and inspection services along with geotechnical support. Jeff is serving as a Project Manager.

Twining | City of Santa Clarita - Hydrogen Fueling Station 27 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

PAUL SOLTIS, PE, GE
Geotechnical Engineer
Paul Soltis, PE, GE, brings more than 33 years of technical expertise to Twining. His expertise includes geotechnical investigations and analyses relative to the development of high-rise buildings, mixed-use facilities, DSA- and HCAI-permitted buildings, and other essential facilities. Paul’s experience includes assuming the role as Geotechnical Engineer of Record during the construction phase of numerous high-profile projects throughout Southern California. He has extensive experience working under the jurisdiction of the City of LA Department of Building and Safety, County of Los Angeles GMED, DSA, and HCAI. Paul is responsible for the technical oversight of Twining’s geotechnical engineering projects and management of the firm’s geotechnical personnel.

City of Santa Monica, City Yards Modernization
The City redeveloped a 14.7-acre, 16-structure field maintenance facility to accommodate new facility uses. Portions of the site sit on top of a former landfill that extends more than 50 feet deep. In addition, the presence of an untouchable landfill cap near the surface made grading difficult. Twining provided soil and material testing, and special inspection services for the construction project, the factors which have made for a unique and engaging challenge for our geotechnical team. Twining assumed the role of the geotechnical engineer of record for the project’s redevelopment and modernization construction. Paul served as a Senior Project Engineer.

Eastern Municipal Water District, Las Brisas Transmission Pipeline Twining performed the geotechnical subgrade investigation for the proposed construction of approximately 2,700 linear feet of 24-inch diameter pipeline. The objective of the geotechnical investigation was to evaluate the surface and subsurface geologic conditions, soil type, water table level, and construction conditions along the project alignment.

Recommendations in accordance with the District’s design standards were then provided regarding the geotechnical aspects of the proposed improvements. Paul served as Project Manager and Geotechnical Engineer of Record.

City of Beverly Hills, Crescent Drive Parking Structure The parking structure is a three-level facility with all levels subterranean and 150 parking stalls per level. Twining observed placement of reinforcing steel and concrete for mat foundation; placement of reinforcing steel and concrete for shotcrete, retaining walls and shear wall lateral force resisting system; field welding and bolting; concrete compression testing; provided prestress / post tensioned tendons testing and reinforced steel testing. Paul served as Geotechnical Engineer of Record on this project.

Overview
» Years’ Experience: 1992 –
Present
Current Licenses Held
Professional Engineer, Civil, CA
56140
Registered Geotechnical Engineer,
CA GE 2606
Education
» MS, Geotechnical Engineering,
University of Colorado, Boulder,
Colorado, 2000
» BS, Civil Engineering, California
Polytechnic State University, San
Luis Obispo, California, 1993
**Relationship and cost to the
proposed project activities are
outlined in the "Cost Proposal"
section of this RFP response.*
Twining | City of Santa Clarita - Hydrogen Fueling Station 28 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

JON BROWNING, PG,CEG
Senior Engineering Geologist
Jon Browning, PG, CEG, has more than 20 years of experience in the engineering geology and environmental consulting industry. His professional experience includes geologic feasibility studies, site characterization, seismic site assessments, engineering design, and construction phases of numerous mining, civil, and land development projects. His expertise lies in developing subsurface geotechnical exploration strategies for fault trench and landslide investigations, geologic field mapping, executing, and managing large field investigation projects, directing subcontractors, consulting with clients, and preparing technical reports.

Jon has extensive field experience coordinating and managing subsurface geotechnical/mineral exploration investigations utilizing hollow stem auger, solid stem auger, mud/air rotary, direct push, reverse circulation, sonic, dual rotary, and cone penetrometer testing drilling techniques. Jon’s environmental geology experience includes remedial investigation/feasibility study (RI/FS), surface/ groundwater hydrogeology characterization, remediation system installation, aquifer pump testing, and soil/groundwater investigations. This includes experience installing observation, monitoring, and pumping wells.

The City of Rialto, New Police Facility
The City of Rialto is advancing the development of a new Police Facility to provide modernized space for law enforcement operations and community services. The project includes comprehensive planning, schematic design, and preconstruction services to support the delivery of a secure and efficient facility. Twining has been engaged to provide materials testing, special inspection services, and geotechnical consulting in support of the design and future construction. Jon is playing a key role in evaluating site conditions and providing technical oversight for geotechnical recommendations, ensuring the foundation design and construction approach are tailored to the site’s geologic profile and long- term performance needs.

Twining assumed the role of the geotechnical engineer of record for the project’s redevelopment and modernization construction. Jon served as a Certified Engineering Geologist
Overview
» Years’ Experience: 2005 –
Present
Current Licenses Held
» California Professional Geologist,
No. 9012
» California Certified Engineering
Geologist, No. 2615
Education
» BA, Geography – Emphasis
in Environmental and Natural
Resources Geology Minor, San
Diego State University, California,
2005
» GIS, Certificate, San Diego Mesa
College, California, 2003
**Relationship and cost to the
proposed project activities are
outlined in the "Cost Proposal"
section of this RFP response.**
Twining | City of Santa Clarita - Hydrogen Fueling Station 29 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

GLENN TAYLOR
Laboratory Manager
Glenn Taylor is Twining’s Ventura office Laboratory Manager and has over 27 years of experience in the testing and inspection field. He oversees the daily activities of all laboratory personnel in our Ventura facility. Glenn is responsible for ensuring that our laboratory is fully operational and properly staffed to meet the testing requirements of your projects. Glenn has a wealth of industry experience and is local to the region. Glenn is certified in ACI, and Caltrans regarding field samples along with managerial responsibility of testing results and equipment maintenance. The project types that Glenn has worked on range from roadway construction of citywide projects to public agency infrastructure projects such as airports, schools, neighborhoods, and other locations. Glenn also serves as the Radiation Safety Officer, and Safety Ambassador.

Overview
» Years’ Experience: 1998 –
Present
Current Licenses Held
» ACI Aggregate Base Testing
Technician
» ACI Concrete Laboratory Testing
Technician - Level 1
» ACI Concrete Field Testing Tech-
nician – Grade I
» ACI Concrete Strength Testing
Technician
» ACI Aggregate Testing Technician
- Level 1
» Caltrans AASHTO Certification:

T166, T209, T269, T275, T 308
» Caltrans Certification: 105, 125
(AGG), 201, 202, 205, 216, 217,
226, 227, 229, 308, 309, 370, 382,
504, 518, 521, 523.1, 532.2, 539,
540, 543, 556, 557
**Relationship and cost to the
proposed project activities are
outlined in the "Cost Proposal"
County of Ventura, Santa Rosa Bike Lane and Pedestrian
Improvements
The County of Ventura and their Ventura County Board of Supervisors unanimously approved to implement bike lanes and make improvements to Santa Rosa Road in Ventura County. This improvement aimed to improve safety for cyclists, as it covered the construction of 3.4 miles of new bicycle lanes and pedestrian improvements. The project consisted of pavement widening in certain areas, installation of rumble strips on both sides of the road, curb, gutter, and sidewalk construction, slurry sealing, reinstallation of traffic signals and bike loop detectors, as well as the addition of new pavement markings and signage. Twining provided materials testing and inspection services.

Glenn was the Laboratory Manager for this project.

City of Thousand Oaks, Annual Pavement Overlay and Slurry Program
The City of Thousand Oaks is responsible for maintaining approximately 380 miles of streets and is a leader in exploring the use of innovative pavements with emphasis on utilizing recycled crumb rubber in asphalt concrete pavements. Since 2010, Thousand Oaks has engaged the services of Twining to assist in review and revision of the community’s pavement rehabilitation specifications, perform materials design studies, implement quality assurance programs, perform construction inspection and testing, perform pavement destructive testing, and assist with pavement deflection testing for future pavement designs. Glenn serves as the Laboratory Manager.

Twining | City of Santa Clarita - Hydrogen Fueling Station 30 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

BRANDAN MATHIS
Lead Special Inspector (Group 2)
Brandan brings over 21 years of technical experience to Twining. His experience encompasses all aspects of testing and inspection with special emphasis on concrete and welding inspection. Brandan’s knowledge of California building requirements and multiple inspection certifications/licenses make him an invaluable team member of every project to which he is dispatched.

Overview
» Years’ Experience: 2003 – Present
Current Licenses Held
» ACI Concrete Field Testing
Technician – Grade I
» AWS Certified Welding Inspector
» ICC Structural Steel and Welding
Legacy
» ICC Reinforced Concrete
» ICC Spray Applied Fire Proofing
» OSHA 10-Hour
Education
» Ventura College, Ventura
**Relationship and cost to the
proposed project activities are
outlined in the "Cost Proposal"
section of this RFP response.*
City of Santa Clarita, Old Town Newhall Parking Structure The City’s first Design-Build project, the project consisted of the new construction of a 24,200-square-foot, 376 stall, six-story concrete parking structure. Twining performed materials testing and inspection services on this project. Brandan served as a deputy inspector throughout construction.

County of Ventura, Erringer Fire Station #47
The project consisted of the construction of a 7,000 square foot, single- story fire station with associated site improvements on a 2.45 acre vacant site in Simi Valley. Twining’s scope of services included providing quality control material testing and inspections services. Brandan served as an inspector throughout construction.

Los Angeles Community College District, Pierce College
Maintenance & Operations Facility
This project included a paved maintenance yard and a central plant.

The building is 42,000 square feet and the yard is approximately 85,000 square feet. The building was designed to meet or exceed LEED Gold certification standards. Brandan was responsible for conducting certified welding inspection for this project, mainly at the fabrication shop.

Las Virgenes Unified School District, Calabasas High School Performing Arts and Entertainment Center
This new 33,000 square foot facility boasts a 650-seat professional- quality theater, a 100-seat flexible black box theater and professional- level acoustics, technical components and stage specifications. Brandan served as a long term welding inspector on this project for more than a year. Additional responsibilities included performing torque tests.

Las Virgenes Unified School District, Lindero Canyon Middle School Redevelopment
This project consisted of new construction as well as existing facility renovations throughout the campus. Among the new features at the school were a two-story media center and library, university grade science labs, a new computer lab, and 32 new and renovated classrooms and support facilities. Brandan performed batch plant inspection for this project, ensuring adherence to DSA standards.

Twining | City of Santa Clarita - Hydrogen Fueling Station 31 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

PETER KIM
Special Inspector (Group 2)
Peter brings over 45 years of technical experience to Twining. His professional experience includes welding, masonry, and reinforced concrete.

Overview
» Years’ Experience: 1980 –
Present
Current Licenses Held
» AWS Certified Inspector
» ICC Steel and Bolting
» ICC Structural Welding
» ICC Structural Masonry
» ICC Reinforced Concrete
» ICC Master
City of Santa Monica, City Yards
This project entails a $106 million redevelopment and modernization of an existing 14.7-acre municipal Operations, Maintenance, and Storage Yard. A 60-month-long project, the modernization will be carried out over three phases and include the new construction of six structures, totaling roughly 60,500 square feet of gross space, along with extensive ground improvement. The City Yards Modernization included compressed natural gas (CNG) fueling stations as part of the project scope.

Twining’s scope of services included providing quality control material testing and inspections services. Peter provided inspector services.

County of Ventura, Todd Road Jail Health and Programming Unit The project consisted of providing materials testing and specialty inspections at the Todd Road Jail Health and Programming Unit in Ventura County, California. The project included the review of project plans, specifications and geotechnical reports, attend meetings, provide geotechnical, concrete, masonry, metal, anchoring, and welding inspection, provide materials testing, prepare testing reports, and provide project inspection services for the Health & Programming Unit project at Todd Road Jail as requested in writing by the Project Manager or other authorized personnel. Peter served as an inspector and performed the necessary field, welding, concrete and CWI inspections and responsibilities needed for the project.

Lockheed Martin Plant 10, Building 603/603A Utility Expansion The project consisted of an expansion of the chilled water, centralized utilities, and distribution system within the existing Building 603/603A at the Lockheed Plant 10 facility in Palmdale, California. The expansion included the addition of a 70-foot by 12-foot cooling tower and associated ancillary equipment supported on a drilled shaft foundation system. The ancillary and other exterior equipment consisted of pumps and electrical equipment on shallow foundations, supported on pads up to approximately 20-feet by 30-feet. Interior work at Building 603/603A will consisted of floor mounted pipe supports, and equipment pads up to 9-feet by 12-feet.

Twining provided material testing services. Peter served as an inspector and covered review of welding, concrete, reinforcing steel and epoxy dowels.
**Relationship and cost to the proposed project activities are outlined in the "Cost Proposal" section of this RFP response.*
Twining | City of Santa Clarita - Hydrogen Fueling Station 32 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

CHRISTIAN BARROSO
ASNT NDT Level III /Special Inspector (Group 2)
Christian brings over 17 years of technical experience to Twining. His professional experience includes welding and structural steel inspection. This knowledge of building requirements and multiple inspection certifications/licenses make him an invaluable and efficient lead inspector on every project to which he is dispatched. The last several years, he has acted as a Senior Field Technician/Special Inspector, and NDT/AWS Welding Inspector on large, complex projects.

Overview
» Years’ Experience: 2008 –
Present
Current Licenses Held
» AWS CWI
» ICC Steel and Bolting
» ICC Structural Welding
» ASNT NDT Level III - Magnetic
Particle Testing
» ASNT NDT Level III - Ultrasonic
Testing
» ASNT NDT - Dye Pen Testing
City of Rialto, Police Services Headquarters
The City of Rialto Police Depart project consists of two (2) buildings, one being a two (2) story approximately 45,180 SF concrete tilt up panel building with metal decking and additional structural steel components. Second, a single single-story tilt-up concrete panel building with metal decking and other structural steel components of approximately 19,500 square feet. and on-site parking. Twining is providing testing and inspection of reinforcing steel, concrete, shotcrete, FRP , soil, asphalt, welding, seismic anchors, and engineering review. Christian is performing welding, material identification and shop inspections on this project
Los Angeles County Metropolitan Transportation Authority (Metro), Expo Line Maintenance Facility – Seismic Retrofit
Christian provided support on the seismic retrofit efforts for a maintenance facility in Santa Monica. Work included installation of diagonal braces and structural steel angles at various locations to enhance lateral stability.

City of Santa Monica, City Yards
This project entails a $106 million redevelopment and modernization of an existing 14.7-acre municipal Operations, Maintenance, and Storage Yard. A 60-month-long project, the modernization will be carried out over three phases and include the new construction of six structures, totaling roughly 60,500 square feet of gross space, along with extensive ground improvement. The City Yards Modernization included compressed natural gas (CNG) fueling stations as part of the project scope.

Twining’s scope of services included providing quality control material testing and inspections services. Christian performed welding, material identification and shop inspections on this project
**Relationship and cost to the proposed project activities are outlined in the "Cost Proposal" section of this RFP response.*
Twining | City of Santa Clarita - Hydrogen Fueling Station 33 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

AXEL NOROUZIAN
Special Inspector (Group 2)
Axel brings over 11 years of technical experience to Twining. His professional experience encompasses all aspects of testing and inspection with special emphasis on concrete and welding inspection. Axel’s knowledge of California building requirements and multiple inspection certifications/licenses make him an invaluable team member of every project to which he is dispatched. Axel is an ICC Commercial Building/Mechanical/Plumbing/Electrial/Combination inspector and will be able to provide Mechanical and Electrical inspections if required.

Overview
» Years’ Experience: 2014 –
Present
Current Licenses Held
» City of Santa Clarita:

Masonry Inspection
Anchors Inspection
» ICC Master of Special Inspection
» ICC Spray Applied Fire Proofing
» ICC Structural Steel & Welding
» ICC Structural Masonry
» ICC Reinforced Concrete
» ICC Structural Steel and Bolting
» ICC Prestressed Concrete
» ICC Soils Special Inspector
» ICC Structural Welding
» ICC Commercial Building
» ICC Commercial Mechanical
» ICC Commercial Plumbing
» ICC Commercial Electrical
» ICC Commercial Combination
» OSHA 10-Hour
» City of Los Angeles Wood
» City of Los Angeles Drilled in
Anchors
» City of Los Angeles Masonry
» City of Los Angeles Gunite/
Shotcrete
» City of Los Angeles Concrete
» City of Los Angeles Grading
» County of Los Angeles Pre-
stressed Concrete
» County of Los Angeles Rein-
forced Concrete
» County of Los Angeles Structural
Masonry
Oxnard Union High School District, Del Sol High School
The project consisted of providing geotechnical inspection, materials testing and specialty inspections at Del Sol High School located in the City of Oxnard, California. The project included performing laboratory material acceptance standard test, conduct field observation/density compaction testing services, materials testing in compliance with the project plans and specifications, document test data and observations through daily and end-of-job summary reports, perform other as needed special inspection and materials testing such as asphalt concrete pavement inspection, steel, rebar, masonry and onsite and plant cement concrete inspection, welding inspection, pile driving inspections and other as needed inspections. Axel served as an inspector and performed the necessary shotcrete, concrete, and welding testing and inspections needed for the project.

County of Ventura, Erringer Fire Station #47
The project consisted of the construction of a 7,000 square foot, single- story fire station with associated site improvements on a 2.45 acre vacant site in Simi Valley. Twining’s scope of services included providing quality control material testing and inspections services. Axel served as an inspector throughout construction.

Twining’s scope of services included providing quality control material testing and inspections services. Axel served as an inspector throughout construction.
**Relationship and cost to the proposed project activities are outlined in the "Cost Proposal" section of this RFP response.*
Twining | City of Santa Clarita - Hydrogen Fueling Station 34 SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

JUNIOR ALAMILLA
Special Inspector (Group 2)
Mr. Alamilla experience working on the field and shop inspections include but are not limited to: Visual inspections of epoxied anchors, pull testing of anchors, torque testing of anchors, skidmore testing, material ID and structural steel inspections per AWS specifications. He also has been certified for TKY connections for pipe and HSS welding. He has participated in various projects throughout his career including Public Works Department Projects, Various School Districts, Hospitals Projects, Refineries, Commercial Projects, and some Private Projects.

Overview
» Years’ Experience: 2001 –
Present
Current Licenses Held
» AWS/CWI No.12021231
» City of LA Deputy Building
Inspector – Steel Construction
No.P024057
» County of LA Department
Building and Safety Division –
Special Inspector No.01808
» ICC Structural Steel & Structural
Welding Inspector No.9370063
**Relationship and cost to the
proposed project activities are
outlined in the "Cost Proposal"
section of this RFP response.**
Westside Purple Line Extension
As a shop welding inspector Mr. Alamilla duties included: Material ID, Inspections of structural steel and bolting per AWS D1.1 & D1.8. Along with scheduling nondestructive testing when needed.

Long Beach USD- Solar Panel Projects (Various Schools)
The As a Field Inspector Mr. Alamilla involvement on this project included: Inspection of the structural steel connections for the solar panel structures per AWS D1.1 & D1.8, architectural steel & structural steel, and perform torque testing.

Haynes Power Plant
As a Field Inspector Mr. Alamilla involvement on this project included:
welding inspections on site for HSS Braces throughout the project and performed torque testing.

Norwalk La Mirada USD – La Mirada H.S. Gym Expansion and Boy’ s & Girl’ s Locker Room Renovations
As a Field Inspector Mr. Alamilla inspected the Norwalk La Mirada Gym Project for a duration of 6 months. Mr. Alamilla duties included: Inspections of structural steel and bolting inspections per AWS D1.1 & D1.8. Along with scheduling non-destructive testing when needed.

Long Beach USD- Milikan H.S. New 1000 Building
As a Field Inspector Mr. Alamilla involvement on this projects included:

Inspection of the structural steel connections for the Milikan H.S. new 1000 Building project structures per AWS D1.1 & D1.8, architectural steel & structural steel, and perform torque testing.

Twining | City of Santa Clarita - Hydrogen Fueling Station 35 Junior Alamilla is provided to Twining by our DSA Subconsultant California Testing & Inspections.

SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

ROBERT MENES
Special Inspector (Group 2)
Mr. Menes has been in the construction industry for over 20 years. He has been involved in the construction of many projects including Transit, educational facilities, parking garages, retro- fit structures, and High-rise building, throughout Southern California. He has an expertise in construction practices, plan reading, code interpretation and compliance with specification.

Robert is armed with knowledge and judgment gained from experience, that will facilitate detecting potential nonconforming items during construction and proactively prevents improper procedures. He also displays effective communication skills with contractor and construction team. He carries (5) ICC special inspection cards and is a City of Long Beach registered Inspector.

This allows him to provide a very high level of continuity to the project by providing multiple inspections without substitutions. His responsibilities include QA/QC of concrete structures, verification of material mill certification, plan interpretation, code enforcement, and Epoxy Injection of cracked concrete.

Overview
» Years’ Experience: 2005 –
Present
Current Licenses Held
» ICC Structural Masonry Special
Inspector
» ICC Reinforced Concrete Special
Inspector
» ICC Master of Special Inspection
» ICC Welding Special Inspector
» ICC Structural Steel & Bolting
» ACI Concrete Field Testing
Technician - Grade I
» LA City Concrete
» LA City Steel
» LA City DIA
**Relationship and cost to the
proposed project activities are
outlined in the "Cost Proposal"
section of this RFP response.**
Regional Connector Corridor | Skanska
The Contractor Quality Control for the project, verification of compliance to the project approved inspection and test plan for the following types of work: His responsibilities include QA/AC of concrete structures material ID and verification of proper paperwork in place, plan interpretation, and code enforcement.

Taxiway T Reconstructions Phase I, Los Angeles, CA
Primary responsibilities included conducting concrete inspections, civil inspections, ensuring that work inspected was in compliance with project plans, specifications and building codes. Providing test results to the contractor. This two-part project represents the Taxiway System between the proposed Midfield Satellite Concourse and the Tom Bradley International Terminal. The construction also includes relocating fuel lines and utilities, all grading, airfield signage and lighting, and construction of power and communication duct banks.

Los Angeles Trade Technical College- East Parking Structure, East Campus Sub-Station and Electrical Distribution System
This project consisted of Four-story concrete parking structure with connecting bridge, electrical distribution system and substation. Provided rebar placement, concrete inspection, structural oversite inspection and anchor bolt testing. His responsibilities include QA/QC of concrete structures, verification of material mill certification, plan interpretation, code enforcement, and Epoxy Injection of cracked concrete.

Twining | City of Santa Clarita - Hydrogen Fueling Station 36 Robert Menes is provided to Twining by our DSA Subconsultant California Testing & Inspections.

SECTION 1.1.4: PERSONNEL, EQUIPMENT AND FACILITIES1.1 RESPONSE FILE:

Twining | City of Santa Clarita - Hydrogen Fueling Station 37

1.1.5. SUB-CONSULTANTS

1.1 RESPONSE FILE:

There is a 9.19% DBE goal, and we are using a DBE sub-consultant to fulfill this requirement.

If selected, it is our intent to use California Testing and Inspection, Inc. (CTI) to supply the Structural Steel Shop Fabrication Inspection Services. Twining has a long standing relationship with CTI and have worked with them on many projects requiring a DBE.

CTI is located in Los Angeles and has been in business for over 17 years. They provide material testing and special inspection services. They are a small business DBE/MBE/WBE and we have provided these certifications in the attachment section of this proposal. In addition we have provided their inspector's resumes with ours in section 1.1.4.

Contact information:

Fabiola Jaque-Diaz, PE President
P: 213.748.4900
C: 310.461.5616
E: [email protected]
W: http://www.caltestinspection.com
Any additional information will be provided on request.

Form 1 - Notice to Proposers Regarding Contractual Requirements Form 2 - Designation of Subcontractors/Subconsultants
Form 3 - References
Form 4 - Acknowledgment & Acceptance of Scope of Work
Form 5 - City of Santa Clarita Disclosure Statement
Form 6 - Equal Opportunity/Affirmative Action Statement Form 7 - Buy America Certification
Form 8 - Certification and Restrictions on Lobbying
Form 9 - Government-Wide Debarment and Suspension
Form 10 - Race-Conscious DBE Participation Commitment Form Form 11 - Letter of Intent and Affirmation DBE
Form 12 - DBE Information - Good Faith Efforts
Form 13 - Bidders List
Addendum 1 & 2 - Acknowledgment Forms
Sub-Consultant Certifications
DBE - California Testing and Inspection, Inc.

Twining | City of Santa Clarita - Hydrogen Fueling Station 38

ATTACHMENTS
Form 1 - Notice to Proposers Regarding Contractual Requirements Twining | City of Santa Clarita - Hydrogen Fueling Station 39 ATTACHMENTS: REQUIRED FORMS

NOTICE TO PROPOSERS REGARDING CONTRACTUAL REQUIREMENTS
PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California

1. SUMMARY OF CONTRACTUAL REQUIRMENTS
a. A contract is required for any service performed on behalf of the City of Santa Clarita (City).

b. By submitting a proposal, you have reviewed the sample contract documents contained within this request for proposals and agree to be bound by the requirements set forth.

c. Questions and requests for modification of these terms must be negotiated and approved prior to proposal submission and are at the full discretion of the City.

2. SUMMARY OF INDEMNITY AND INSURANCE REQUIREMENTS
a. These are the Indemnity and Insurance Requirements for Contractors providing services or supplies to City of Santa Clarita (City). By agreeing to perform the work or submitting a proposal, you verify that you comply with and agree to be bound by these requirements. If any additional Contract documents are executed, the actual Indemnity language and Insurance Requirements may include additional provisions as deemed appropriate by City’s Purchasing Agent.

b. You should check with your Insurance advisors to verify compliance and determine if additional coverage or limits may be needed to adequately insure your obligations under this agreement. These are the minimum required and do not in any wa y represent or imply that such coverage is sufficient to adequately cover the Contractor’s liability under this agreement. The full coverage and limits afforded under Contractor’s policies of Insurance shall be available to Buyer and these Insurance Requir ements shall not in any way act to reduce coverage that is broader or includes higher limits than those required.

The Insurance obligations under this agreement shall be: 1—all the Insurance coverage and limits carried by or available to the Contractor; or 2—the minimum Insurance requirements shown in this agreement, whichever is greater. Any insurance proceeds in excess of the specified minimum limits and coverage required, which are applicable to a given loss, shall be available to City.

c. Contractor shall furnish the City with original Certificates of Insurance including all required amendatory endorsements and a copy of the Declarations and Endorsement Page of the CGL policy listing all policy endorsements to City before work begins. City reserves the rig ht to require full -certified copies of all Insurance coverage and endorsements.

3. INDEMNIFICATION
a. To the fullest extent permitted by law, CONSULTANT shall defend (with legal counsel reasonably acceptable to CITY), indemnify and hold harmless CITY and its of ficers, agents, departments, officials, representatives and employees (collectively “Indemnitees”) from and against any and all claims, loss, cost, damage, injury (including, without limitation, economic harm, injury to or death of an employee of 29 Twining | City of Santa Clarita - Hydrogen Fueling Station 40 CONSULTANT or its subconsultants), expense and liability of every kind, nature and description that arise from or relate to (including, without limitation, incidental and consequential damages, court costs, attorneys’ fees, litigation expenses and fees of expert co nsultants or expert witnesses incurred in connection therewith and costs of investigation) that arise from or relate to, directly or indirectly, in whole or in part, from: (1) CONSULTANT’s performance of Services under this Agreement, or any part thereof; (2) any negligent act or omission of CONSULTANT, any subconsultant, anyone directly or indirectly employed by them, or anyone that they control; (3) any actual or alleged infringement of the patent rights, copyright, trade secret, trade name, trademark, service mark or any other intellectual or proprietary right of any person or persons in consequence of the use by CITY, or any other Indemnitee, of articles or Services to be supplied in the performance of this Agreement; or (4) any breach of this Agreement (collectively “Liabilities”). Such obligations to defend, hold harmless and indemnify any Indemnitee shall not apply to the extent such Liabilities are caused by the sole negligence or willful misconduct of such Indemnitee, but shall apply to all other L iabilities. The foregoing shall be subject to the limitations of California Civil Code section 2782.8 as to any design professional services performed by CONSULTANT and in particular the limitation on CONSULTANT’s duty to defend whereby such duty only ari ses for claims relating to the negligence, recklessness or willful misconduct of CONSULTANT as well as the limitation on the cost to defend whereby CONSULTANT will only bear such cost in proportion to CONSULTANT’s proportionate percentage of fault (except as otherwise provided in section 2782.8).

b. The foregoing indemnification provisions will not reduce or affect other rights or obligations which would otherwise exist in favor of the CITY and other Indemnitees.

c. CONSULTANT shall place in its subconsulting agreements and cause its subconsultants to agree to indemnities and insurance obligations in favor of CITY and other Indemnitees in the exact form and substance of those contained in this Agreement.

4. INSURANCE
a. Before commencing performance under this Agree ment, and at all other times this Agreement is effective, CONSULTANT will procure and maintain the following types of insurance with coverage limits complying, at a minimum, with the limits set forth below:

Type of Insurance Limits
Commercial general liability: $1,000,000
Professional liability $1,000,000
Business automobile liability $1,000,000
Workers compensation Statutory requirement

b. Commercial general liability insurance will meet or exceed the requirements of ISO -CGL Form No. CG 00 01 11 85 or 88. The amount of insurance set forth above will be a combined single limit per occurrence for bodily injury, personal injury, and property damage for the policy coverage. Automobile coverage will be written on ISO Business Auto Coverage Form CA 00 01 06 92, including symbol 1 (Any Auto). Liability policies will be endorsed to name CITY, its officials, and employees as “additional insureds” under said insurance coverage and to state that such insurance will be deemed “primary” such that any other insurance that may be carried by CITY will be excess thereto. Such endorsement must be reflected on ISO 30 Form 1 - Notice to Proposers Regarding Contractual Requirements ATTACHMENTS: REQUIRED FORMS Twining | City of Santa Clarita - Hydrogen Fueling Station 41 Form No. CG 20 10 11 85 or 88, or equivalent. Such insurance will be on an “occurrence,” not a “claims made,” basis and will not be cancelable or subject to reduction except upon thirty (30) days prior written notice to CITY.

c. Professional liability coverage will be on an “occurrence basis” if such coverage is available, or on a “claims made” basis if not available. When coverage is provided on a “claims made basis,” CONSULTANT will continue to renew the insurance for a period of at least three (3) years after this Agreement expires or is terminated. Such insurance will have the same coverage and limits as the policy that was in effect during the term of this Agreement, and will cover CONSULTANT for all claims made by CITY arising out of any errors or omissions of CONSULTANT, or its officers, employees or agents during the time this Agreement was in effect.

d. CONSULTANT will furnish to CITY duly authenticated Certificates of Insurance evidencing maintenance of the insurance required under this Agreement, including endorsements, and such other evidence of insurance or copies of policies as may be reasonably required by CITY from time to time. Insurance must be placed with California-admitted insurers with (other than workers compensation) a current A.M. Best Company Rating of at least “A:VII.”

e. Waiver of Subrogation: The insurer(s) agree to waive all rights of subrogation against CITY, its elected or appointed officers, officials, agents, volunteers and employees for losses paid under the terms of the workers compensation policy which arise from work performed by CONSULTANT for CITY.

f. Should CONSULTANT, for any reason, fail to obtain and maintain the insurance required by this Agreement, CITY may obtain such coverage at CONSULTANT’s expense and deduct the cost of such insurance from payments due to CONSULTANT under this Agreement or terminate pursuant to TERMINATION section. In the alternative, shoul d CONSULTANT fail to meet any of the insurance requirements under this Agreement, City may terminate this Agreement immediately with no penalty.

g. Should CONSULTANT’S insurance required by this Agreement be cancelled at any point prior to expiration of the policy, CONSULTANT must notify City within 24 hours of receipt of notice of cancellation.

Furthermore, CONSULTANT must obtain replacement coverage that meets all contractual requirements within 10 days of the prior insurer’s issuance of notice of cancella tion. CONSULTANT must ensure that there is no lapse in coverage.

h. The CITY shall be entitled to any coverage in excess of the minimums required herein.

I have read and understand the above requirements and agree to be bound by them for any work performed for the City.

Authorized Signature: ______________________________ Date: ___________________

Printed Name: ____________________________________
31 Michael Molina, Senior Director of Client Services
August 25, 2025
Form 1 - Notice to Proposers Regarding Contractual Requirements ATTACHMENTS: REQUIRED FORMS Form 2 - Designation of Subcontractors/Subconsultants
Twining | City of Santa Clarita - Hydrogen Fueling Station 42 ATTACHMENTS: REQUIRED FORMS

DESIGNATION OF SUBCONTRACTORS/SUBCONSULTANTS
PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California
The City of Santa Clarita has adopted a Disadvantaged Business Enterprise (DBE) Program to support federally funded procureme nts. The City strongly encourages the participation of small and Disadvantaged Business Enterprises in its federally funded projects and this site is intended to provide assistance to such businesses. Listed below are the names and locations of the places of business of each subcontrac tor, supplier, and vendor who will perform work or labor or render service in excess of ½ of 1 percent, or $10,000 (whichever is greater) of the prime contractor's total bid: DBE status, age of firm and annual gross receipts are required if sub -contractor is participating as a DBE. If no Subcontractors will be used fill out the form with NA. Please add additional sheets if needed.

Subcontractor DIR Registration No. Dollar Value of Work Age of firm: DBE: Yes
Certifying Agency:

Annual Gross Receipts:

Location and Place of Business
Bid Schedule Item No’s: Description of Work
License No. Exp. Date: / / Phone ( )
Subcontractor DIR Registration No. Dollar Value of Work Age of firm: DBE: Yes No
Certifying Agency:

Annual Gross Receipts:

Location and Place of Business
Bid Schedule Item No’s: Description of Work
License No. Exp. Date: / / Phone ( )
NOTE: A contractor or subcontractor shall not be qualified to propose on, be listed in a proposal, subject to the requirements of Section 4104 of the Public Contract Code, or engage in the performance of any contract for public work, as defined in this chapter, unless cu rrently registered and qualified to perform public wor k pursuant to Section 1725.5 of the Labor Code. It is not a violation of this section for an unregistered contractor to submit a proposal that is authorized by Section 7029.1 of the Business and Professions Code or by Section 10164 or 20103.5 of the Public Contract Code, provided the contractor is registered to perform public work pursuant to Section 1725.5 of the Labor Code at the time the contract is awarded.
32 California Testing & Inspections, Inc TBD
15957 Vermont Avenue, Paramount, CA 90723
Structural Steel Shop Fabrication Inspection Services & Additional Inspection Services 1000007591
17 CUCP $2-3 Million
C-76471 12/31/2026 213-748-4900
Form 3 - References
Twining | City of Santa Clarita - Hydrogen Fueling Station 43

REFERENCES
PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California
The following are the names, addresses, and telephone numbers of three public agencies for which proposer has performed work of a similar scope and size within the past 3 years. If the instructions on this form conflict with the references requested in the scope of work, the scope of work shall govern. Complete this form out accordingly. Fill out this form completely and upload it with your proposal.

1. __________________________________________________________________________________ Name and Address of Owner / Agency
__________________________________________________________________________________ Name and Telephone Number of Person Familiar with Project __________________________________________________________________________________ Contract Amount Type of Work Date Completed

2. __________________________________________________________________________________ Name and Address of Owner / Agency
__________________________________________________________________________________ Name and Telephone Number of Person Familiar with Project __________________________________________________________________________________ Contract Amount Type of Work Date Completed

3. __________________________________________________________________________________ Name and Address of Owner / Agency
__________________________________________________________________________________ Name and Telephone Number of Person Familiar with Project __________________________________________________________________________________ Contract Amount Type of Work Date Completed
33 REFERENCES
PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California
The following are the names, addresses, and telephone numbers of three public agencies for which proposer has performed work of a similar scope and size within the past 3 years. If the instructions on this form conflict with the references requested in the scope of work, the scope of work shall govern. Complete this form out accordingly. Fill out this form completely and upload it with your proposal.

3. __________________________________________________________________________________ Name and Address of Owner / Agency
__________________________________________________________________________________ Name and Telephone Number of Person Familiar with Project __________________________________________________________________________________ Contract Amount Type of Work Date Completed
33 Lisa Campos, P: 661.286.4025
$20,230.08 Material Testing and Inspection Services 2015 -On-Going Additional Contact: Ramiro Fuentes P: 661.286.4134
Additional Contact: Diana Previtire P: 661.312.6281
City of Santa Monica | 1685 Main Street, Santa Monica, CA 90401 | City Yards Project 8/2024$543,837.00 Geotechnical, Material Testing and Inspection Services 2020 - On-Going$150,000.00 Material Testing and Inspection Services ATTACHMENTS: REQUIRED FORMS
Sebastian Felbeck P| (310) 434-2675
County of Ventura Department of Public Works | 800 South Victoria Avenue, Ventura, CA 93009 | Multiple Projects Devi Nallamala, PM: P: 805.658.4354 or
Jon Jacobson, Project Manager Engineering Services | P:805.654.2022 | C:805.665.0268 Form 4 - Acknowledgment & Acceptance of Scope of Work
Twining | City of Santa Clarita - Hydrogen Fueling Station 44 ATTACHMENTS: REQUIRED FORMS
August 25, 2025
August 25, 2025
August 25, 2025

ACKNOWLEDGEMENT & ACCEPTANCE OF SCOPE OF WORK

PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California

By providing the three (3) required signatures below, the Contractor acknowledges full understanding, complete agreement to, and accepts in its entirety, all Scope of Work for the Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design -Build Project . The Contractor will be expected to perform maintenance practices and uphold the standards herein to the established Scope of Work throughout the length of the contract.

*Supervisor’s Signature:___________________________________________Date:__________

*Estimator’s Signature:____________________________________________Date:__________

*Owner’s Signature:______________________________________________Date:__________

*All three signatures required

34 Form 5 - City of Santa Clarita Discloser Statement
Twining | City of Santa Clarita - Hydrogen Fueling Station 45 ATTACHMENTS: REQUIRED FORMS

CITY OF SANTA CLARITA DISCLOSURE STATEMENT

PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California
The following information must be disclosed:

1. List the names of all persons having a financial interest in the Request for Proposals.

2. If any person identified pursuant to No. 1 above is a corporation or partnership, list the names of all individuals owning more than ten percent of the shares in the corporation or owning any partnership interest in the partnership.

3. If any person identified pursuant to No. 1 above is a non-profit organization or a trust, list the names of any persons serving as a director of the non-profit organization or as a trustee or beneficiary or trustor of the trust.

4. Has the offeror had more than $250.00 worth of business transacted with any member of the City of Santa Clarita staff, boards, commissions, committees, and Council within the past twelve months? If yes, please indicate the person(s) with whom you have conducted business.

NOTE: Attach additional pages as necessary.

_________________________________
Signature of Offeror

_________________________________
Print or Type Name of Offeror

_________________________________
Date
35 Michael Molina, Senior Director of Client Services
N/A
No
Robert Ryan, CEO - 99% Owner of Twining, Inc.

Linas Vitkus, PE, GE, COO - 1% Owner of Twining, Inc.

Twining, Inc.

August 25, 2025

EQUAL OPPORTUNITY/AFFIRMATIVE ACTION STATEMENT
PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California
The offeror hereafter described will not discriminate against any employee or applicant for employment because of race/color, national origin, sex, sexual preference, religion, age, or handicapped status in employment or the provisions of services.
________________________________________
Signature
_________________________________________
Typed Name and Title
36 Form 6 - Equal Opportunity/Affirmative Action Statement Twining | City of Santa Clarita - Hydrogen Fueling Station 46 Michael Molina, Senior Director of Client Services
ATTACHMENTS: REQUIRED FORMS
Twining | City of Santa Clarita - Hydrogen Fueling Station 47 Form 7 - Buy America Certification

BUY AMERICA CERTIFICATION

STEEL OR MANUFACTURED PRODUCTS
General Requirement (as stated in 49 U.S.C. 5323(j) and 2 CFR Part 184) a. Except as provided in 49 CFR 661.7 and 49 CFR 661.11, no funds may be obligated by FTA for a grantee project unless all iron, steel, manufactured products and construction materials used in the project are produced in the United States.
b. All steel and iron manufacturing processes must take place in the United States, except metallurgical processes involving refinement of steel additives.
c. The steel and iron requirements apply to all construction materials made primarily of steel or iron and used in infrastructure projects such as, transit or maintenance facilities, rail lines, and bridges. These items include, but are not limited to, structural steel or iron, steel or iron beams and columns, running rail and contact rail. These requirements do not apply to steel or iron used as components or subcomponents of other manufactured products or rolling stock, or to bimetallic power rail incorporating steel or iron components.
d. For a manufactured product to be considered produced in the United States:

1. All of the manufacturing processes for the product must take place in the United and

2. All of the components of the product must be of U.S. origin. A component is considered of U.S. origin if it is manufactured in the United States, regardless of the origin of its subcomponents. e. For construction materials to be considered produced in the United States:

1. All of the manufacturing processes for the product must take place in the United and

2. All of the components of the product must be of U.S. origin. A component is considered of U.S. origin if it is manufactured in the United States, regardless of the origin of its subcomponents.

If steel, iron, manufactured products or construction materials (as defined in 49 CFR 661.3 and 661.5 and 2 CFR Part 184) are being procured, the appropriate certificate as set forth below shall be completed and submitted by each bidder or offeror in accordance with the requirement contained in 49 CFR 661.13(b).

CERTIFICATES ON THE NEXT PAGE
ATTACHMENTS: REQUIRED FORMS
Twining | City of Santa Clarita - Hydrogen Fueling Station 48 August 25, 2025
Twining, Inc.

Bidder to complete the Buy America and Build America, Buy America certificate below. Bidder shall certify EITHER COMPLIANCE OR NON-COMPLIANCE (not both).

Certificate of Compliance with Buy America and Build America, Buy America Requirements The bidder or offeror hereby certifies that it will comply with the requirements of 49 U.S.C. 5323(j)(1), and the applicable regulations in 49 CFR part 661 and 2 CFR Part 184.

Company:________________________________________________________________________________ Name: Title:______________________________________
Signature: Date:______________________________________
Certificate of Non-Compliance with Buy America and Build America, Buy America Requirements The bidder or offeror hereby certifies that it cannot comply with the requirements of 49 U.S.C. 5323(j), but it may qualify for an exception to the requirement pursuant to 49 U.S.C. 5323(j)(2), as amended, and the applicable regulations in 49 C.F.R. 661.7.

Company:________________________________________________________________________________ Name: Title:______________________________________
Signature: Date:______________________________________
Michael Molina Senior Director of Client Services Form 7 - Buy America Certification ATTACHMENTS: REQUIRED FORMS Twining | City of Santa Clarita - Hydrogen Fueling Station 49 Form 8 - Certification and Restrictions on Lobbying
ATTACHMENTS: REQUIRED FORMS
Twining | City of Santa Clarita - Hydrogen Fueling Station 50 ATTACHMENTS: REQUIRED FORMS Form 8 - Certification and Restrictions on Lobbying Twining | City of Santa Clarita - Hydrogen Fueling Station 51 Form 9 - Government-Wide Debarment and Suspension

GOVERNMENT-WIDE DEBARMENT AND SUSPENSION
(NONPROCUREMENT)
Instructions for Certification: By signing and submitting this bid or proposal, the prospective lower tier participant is providing the signed certification set out below. e. It will comply and facilitate compliance with U.S. DOT regulations, Suspension and 2 CFR part 1200, which adopts and supplements the U.S.

Office of Management and Budget (U.S. OMB) to Agencies on Governmentwide Debarment and Suspension 2 CFR part 180, f. To the best of its knowledge and belief, that its Principals and Subrecipients at the first tier:

Are eligible to participate in covered transactions of any Federal department or agency and are not presently:

9. Debarred,

10. Suspended,

11. Proposed for debarment,

12. Declared ineligible,

13. Voluntarily excluded, or

14. Disqualified,
d. Its management has not within a three-year period preceding its latest application or proposal been convicted of or had a civil judgment rendered against any of them for:

1. Commission of fraud or a criminal offense in connection with obtaining, attempting to obtain, or performing a public (Federal, State, or local) transaction, or contract under a public transaction,

2. Violation of any Federal or State antitrust statute, or,

3. Commission of embezzlement, theft, forgery, bribery, falsification or destruction of records, making any false statement, or receiving stolen property, e. It is not presently indicted for, or otherwise criminally or civilly charged by a governmental entity (Federal, State, or local) with commission of any of the offenses listed in the preceding subsection 2.b of this Certification, f. It has not had one or more public transactions (Federal, State, or local) terminated for cause or default within a three-year period preceding this Certification, g. If, at a later time, it receives any information that contradicts the statements of subsections 2.a 2.d above, it will promptly provide that information to FTA, h. It will treat each lower tier contract or lower tier subcontract under its Project as a covered lower tier contract for purposes of 2 CFR part 1200 and 2 CFR part 180 if it:

ATTACHMENTS: REQUIRED FORMS

1. Equals or exceeds $25,000,,

2. Is for audit services, or,

3. Requires the consent of a Federal official, and
5 It will require that each covered lower tier contractor and subcontractor:
a) Comply and facilitate compliance with the Federal requirements of 2 CFR parts 180 and 1200, and
b)Assure that each lower tier participant in its Project is not presently declared by any Federal department or agency to be:

6. Debarred from participation in its federally funded Project,

7. Suspended from participation in its federally funded Project,

8. Proposed for debarment from participation in its federally funded Project,

9. Declared ineligible to participate in its federally funded Project,

10. Voluntarily excluded from participation in its federally funded Project, or

11. Disqualified from participation in its federally funded Project, and platform or the Signature Page if it or any of its principals, including any of its first tier Subrecipients or its Third-Party Participants at a lower tier, is unable to certify compliance with the preceding statements in this Certification Group.

TrAMS platform or the Signature Page if it or any of its principals, including any of its first tier Subrecipients or its Third-Party Participants at a lower tier, is unable to certify compliance with the preceding statements in this Certification Group.

Certification
Contractor:

Signature of Authorized Official: Date:
:

Form 9 - Goverment-Wide Debarment and Suspension
Twining | City of Santa Clarita - Hydrogen Fueling Station 52 August 25, 2025
Twining, Inc.

Michael Molina, Senior Director of Client Services
ATTACHMENTS: REQUIRED FORMS
Twining | City of Santa Clarita - Hydrogen Fueling Station 53 Form 10 - DBE Participation Commitment
August 25, 2025
Michael Molina
CUCP 37594 Special Inspections TBD
951.552.0031 [email protected]
TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Twining, Inc.

9.19%
See Cost File for total Bid Price
Client Services Manager
California Testing &
Inspections, Inc.
15957 Vermont Ave
Paramount, CA 90723
213.748.4900
TBD
TBD
TBD
** All dollar values and bid totals are outlined in the "Cost Proposal" section of this RFP response.** ATTACHMENTS: REQUIRED FORMS
Form 11 - Letter of Intent and Affirmation DBE
Twining | City of Santa Clarita - Hydrogen Fueling Station 54 39 PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Twining, Inc.
1879 Portola Road
Ventura CA 93003
Structural Steel Shop Fabrication Inspection
Any additional inspection services needed to meet the DBE goal of 9.19% TBD

9.19%
California Testing & Inspections, Inc.
15957 Vermont Ave
Paramount CA 90723 213-748-4900
** All dollar values and bid totals are outlined in the "Cost Proposal" section of this RFP response.** ATTACHMENTS: REQUIRED FORMS
Twining | City of Santa Clarita - Hydrogen Fueling Station 55 A. Items of Work the Bidder Made Available to DBE Firms ; a description of work items and approximate dollar amounts made available to DBE firms by the bidder, value of work items as a percentage of total contract work, breakdown of bid items or larger scopes of contract work (including those items normally performed by the bidder with its own work forces) into economically fe asible units to facilitate DBE participation sufficient to meet the DBE contract goal. It is the bidder’s responsibility to demonstrate that sufficient work was made available to facilitate DBE participation as follows (Provide documents that sufficiently evidence the efforts detailed below):

Description of Work
Item
Bidder
Normally
Performs
(Y/N)
Unbundled from
Larger Scope
(Y/N)
If Yes, List
Scope and/or
Bid Item (#)
Amount
($)
Percentage
of Contract

DBE INFORMATION - GOOD FAITH EFFORTS
IFB No: _____________________________ Bid Opening Date ___________________ The City of Santa Clarita (City) established a Disadvantaged Business Enterprise (DBE) goal of 9.19% for this contract. The information provided herein shows that a good faith effort was made by (Bidder).

Bidder shall submit the following information to document adequate good faith efforts to the City no later than 48 hours after the City's bid due date, or as otherwise specified in the solicitation. Bidder should submit the following information even if the “DBE Participation Commitment Form” indicates that the bidder has met the DBE goal. This will protect the bidder’s eligibility for award of the contract if City determines that the bidder failed to meet the goal for various reasons, e.g., a DBE firm was not certified at bid opening, or the bidder made a mathematical error.

Submittal of only the form may not provide sufficient d ocumentation to demonstrate that adequate good faith efforts were made.

The following good faith efforts items (A through H) shall be minimally performed prior to bid submission.

Bidder to complete the following items in sufficient detail to effectively demonstrate that good faith efforts were undertaken to meet the established DBE goal:
40 PROPOSAL # TRT-25-26-02 August 25, 2025
Twining, Inc.

Structural Steel Shop
Fabrication Inspections

Y N TBD 9.19%
** All dollar values and bid totals are outlined in the "Cost Proposal" section of this RFP response.** Form 12- DBE Information - Good Faith EffortsATTACHMENTS: REQUIRED FORMS Twining | City of Santa Clarita - Hydrogen Fueling Station 56 B. Solicitation Effort Documentation; the names and dates of notices sent to certified DBEs soliciting bids for this project and the dates and methods used to following up initial solicitations to determine with certainty whether the DBEs were interested (att ach all copies of solicitation, telephone records, fax confirmations, email communications, etc.) and amount of DBEs to respond. Bidders are reminded to solicit certified DBEs in the City’s market area through all reasonable and available means (e.g. attendance at pre -bid meetings, advertising and written notices.) Bidder to provide documentation to demonstrate DBE firms were provided information about the contract (location of project, contract number, bid date, items of work made available and contact in formation) in the Invitation to Bid from the bidder and evidence the aforementioned items, as follows:

DBE Firm Contact
Name/Title
Method of
Solicitation
Date of
Initial
Solicictation
Date of
Follow-Up
Solicitation
Response/
Interested in
Bidding
(Note: Solicitations should occur at a minimum no later than 14 calendar days prior to the City's bid due date and follow up to the solicitations should allow DBE firms reasonable time to respond). DBE firms solicited must be advised if the original bid due date has been extended.

C. Rejected DBE Bid Documentation ; the names, addresses, phone numbers, and amount of rejected DBE firms, the reasons for the bidder’s rejection of the DBE firms, the firms selected and accepted for that work (attach all copies of quotes from all firms involved inclusive of a detailed cost breakdown if opted to self -perform work) and the price difference for each DBE if the selected firm is not a DBE, include an explanation of quote(s) rejected.
41 California
Testing and
Inspections,
Inc.

Fabiola Jaque,
President
Email/
Phone
Call
8/12/2025 Yes
N/A
Form 12- DBE Information - Good Faith EffortsATTACHMENTS: REQUIRED FORMS Twining | City of Santa Clarita - Hydrogen Fueling Station 57 D. Publication Efforts Made to Advertise the Projects to Solicit DBE Participation ; names and dates of each publication in which a request for DBE participation for this project was placed by the bidder (attach copies of advertisements or proof of publications). Publications should be placed at a minimum 14 calendar days before the City's bid due date. If bid due date is extended, bidder is to re -advertise new bid due date.

Publications
Type of
Publication
(Trade/General/
Minority/Focus)
Dates of
Advertisement
Duration of
Advertisement
Readvertiseme
nt (Bid-Due
Date Extension)
E. Agencies, Organizations, or Groups Contacted to Provide Assistance in Contracting, Recruiting, and Using DBEs; the names of agencies, organizations or groups contacted to provide assistance in contacting, recruiting and using DBE firms (Attach copies of requests to agencies, responses received and efforts made by the bidder in response).

F. Efforts to Provide Information About the Plans, Specifications, and Contract Requirements ; efforts made to assist interested DBEs in obtaining necessary materials, or related assistance or services, bidder to provide evidence of effort.

G. Assistance with Lines of Credit, Insurance, and/or other Services ; efforts made to assist interested DBEs in obtaining bonding, lines of credit or insurance, and any technical assistance or information related to the plans, specifications and requirements for the work which was provided to DBEs, bidder to provide a list of any assistance provided to DBEs:
42 N/A
N/A
All information was emailed to California Testing & Inspections, Inc.

N/A
Form 12- DBE Information - Good Faith EffortsATTACHMENTS: REQUIRED FORMS Twining | City of Santa Clarita - Hydrogen Fueling Station 58 H. Additional Data to Support a Demonstration of Good Faith Efforts ; in determining whether a bidder made adequate good faith efforts, the City will take into account the performance of other bidders in meeting the DBE contract goal. Attach any additional information to support demonstration of good faith in this section:

NOTE: USE ADDITIONAL SHEETS AS NECESSARY TO DEMONSTRATE RESPONSIVENESS. 43 N/A
N/A
ATTACHMENTS: REQUIRED FORMS Form 12- DBE Information - Good Faith Efforts Twining | City of Santa Clarita - Hydrogen Fueling Station 59 44 Twining, Inc.

Michael Molina
1879 Portola Rd, Suite G
Ventura, CA 93003
Material Testing
Special
Inspection
Geotechnical
Engineering
Material Testing
Special Inspection
California Testing & Inspections, Inc.
15957 Vermont Avenue,
Paramount, CA 90723
Fabiola Jaque
100005568
N/A (951) 552.0031
mmolina@
twininginc.
com
x
127
N/A
N/A
C-76471 YES 213-748-4900 10000759 37594 f j a q u e @
caltestinsp
ection.com
x
17 541380
541350
541330
541380
541350
541330
Form 13 - Bidders ListATTACHMENTS: REQUIRED FORMS
Twining | City of Santa Clarita - Hydrogen Fueling Station 60

Addendum No. 01
August 11, 2025

PROPOSAL # TRT-25-26-02

Addendum No. 01

PROPOSAL # TRT-25-26-02
Construction Inspection and Materials
Testing for Santa Clarita Hydrogen
Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California

This addendum must be acknowledged via BidNet and should be included with the proposal response.

There was a non-mandatory, pre-proposal meeting on August 6, 2025, beginning at 11:00 AM (PT). The meeting was conducted via Zoom.

Attending Staff:
• Adrian Aguilar – Transit Manager, Economic Development • Natalie Freeman – The LeFlore Group (Consultant)
• Grace Ferguson – Project Development Coordinator
• Kathleen Herrera – Office Assistant, Economic Development • Patricia Lacsamana – PTS Office Clerk, Administrative Services • Jaclyn Abston – Buyer, Administrative Services

Attending Vendors:
• Adam Chamaa, PE, GE-AESCO
• Robert Hennessey, Verdantas
• Sajjad Khan, HTEC
• Jose Quevedo, DNV
• Michelle Hejza, Twining, Inc.
• Michael Molina, Twining, Inc.
• Andrea Samaniego, Certerra RMA Group
• Koury Engineering

The following questions were asked and answered:

Q1) Is ICR certified by Caltrans or an accountant?
A1) If you have a certified rate, please include it.

Q2) What is the anticipated construction schedule for this project? A2) The timeline for completion of this project is the end of this year. This may change slightly due to permitting or unforeseen issues. The latest anticipated completion date is early Spring.

Q3) If the duration of the project is expected for the end of the year, how many months would that be? A3) Substantial completion is currently scheduled for December 2025, though this could be extended. In

ADDENDUM 1: ACKNOWLEDGMENT

Addendum No. 01
August 11, 2025

PROPOSAL # TRT-25-26-02

the best‑case scenario, the project duration will be approximately 3.5 months, with overall completion anticipated in Spring 2026. Please see attachment to Addendum No. 1 of project schedule.

Q4) Since this project is federally funded, does this require steps outside the normal process? A4) Yes, it will be bid as design project.

Q5) Will there be soil testing involved in the project? A5) Yes, potentially.

Q6) How strong is the requirement for registered inspectors? A6) Required Contractor & Subcontractor Registration: Only proposals submitted by proposers (along with all listed subcontractors) that are currently registered and qualified to perform public work pursuant to Labor Code Section 1725.5 will be accepted. Furthermore, DIR registration is also required per the RFP: "No CONSULTANT or Subconsultant may be awarded an Agreement containing public work elements unless registered with the Department of Industrial Relations (DIR) pursuant to Labor Code §1725.5. Registration with DIR must be maintained throughout the entire term of this contract, including any subsequent amendments."

Q7) Does the inspector have to be local or is it acceptable for the inspector to be outside the state? A7) There is no local preference; all proposals are evaluated based on qualifications.

Attachment
Project schedule
Geotechnical evaluation completed in 2010

The following was reviewed:
• Project scope of work
• Bidding guidelines

END OF ADDENDUM

This addendum must be acknowledged via BidNet and should be included with the response.

____________________________________ ____________ Contractor’s Representative Date

____________________________________
Company Name

August 25, 2025
Twining, Inc.

Twining | City of Santa Clarita - Hydrogen Fueling Station 61 ADDENDUM 1: ACKNOWLEDGMENT
August 25, 2025
Twining, Inc.

Twining | City of Santa Clarita - Hydrogen Fueling Station 62

Addendum No. 2
August 15, 2025

PROPOSAL # TRT-25-26-02

Addendum No. 2

PROPOSAL # TRT-25-26-02
Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Infrastructure Design-Build Project
City of Santa Clarita, California

This addendum must be acknowledged via BidNet and should be included with the proposal response.

The purpose of this addendum is to address the following for this Request for Proposals (RFP):

I. FORM 60 IN EXCEL
Please see included Form 60 in an excel format.

II. FEDERAL WAGE DETERMINATION
Please see the current attached Federal Wage Determination.

END OF ADDENDUM

This addendum must be acknowledged via BidNet and should be included with the response.

____________________________________ ____________ Contractor’s Representative Date

____________________________________
Company Name

ADDENDUM 2: ACKNOWLEDGMENT
Twining | City of Santa Clarita - Hydrogen Fueling Station 63 ** All dollar values and bid totals are outlined in the "Cost Proposal" section of this RFP response.** ATTACHMENTS: DBE SUBCONSULTANT INFORMATION
LETTER. OIF INTENT Atm AFFIRMATION TO PERFORM AS A DBE
SUBCOWBACWB£SV PPUEQlBB,OKER£IBUCKEB
l(FBHO: PROPOSAL# TRT-25-26-02
FB TITLE: Construction Inspection and Materials Testing for Santa Clarita Hydrogen Fueling Station Twining, Inc.

N,ame of Prime bidder's firm: _____________ _
Address: 1879 Portola Road
Ol:y: Ventura state: CA Zip: 93003
Name ofDBEfm"[ California Testing & Inspections, Inc.

Address: 15957 Vermont Ave
a1:y: Paramount
Telephooe: 213-7 48-4900
Slate:: CA
Desaiptioo of lhOl'k to be perimmecl by DBE firm :

Structural Steel Shop Fabrication Inspection
Zip: 90723
Any additional inspection services needed to meet the DBE goal of 9.19% The bidder is committed lo utilize· lhe above-nmned DBE firm tor Ille \IIOik described above.

The dollar value of U,is wort$ _T_B_D ______ _
The pen:enwge vmue of this wof1! (in comparison m Ule total oomnIct value)% 9-19% Affinnaoon
71le above-flamed IJBE fiITTI affirms lhat it wi peffilml the portion of tlle contract tor Ille values as st!! ed above
� 'B
� �abiola Jaque-Diaz
rifle res1den
If lhe bidder does not receive award of tile prime amlrad, .any and all represefltatTons in !his letter of tntenl and Affirmation shall be nu and y,oid. 39 Twining | City of Santa Clarita - Hydrogen Fueling Station 64 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION

Twining | City of Santa Clarita - Hydrogen Fueling Station 66 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION

Twining | City of Santa Clarita - Hydrogen Fueling Station 67 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION

Twining | City of Santa Clarita - Hydrogen Fueling Station 68 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION

Twining | City of Santa Clarita - Hydrogen Fueling Station 69 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION

Twining | City of Santa Clarita - Hydrogen Fueling Station 70 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION

Twining | City of Santa Clarita - Hydrogen Fueling Station 71 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION

Twining | City of Santa Clarita - Hydrogen Fueling Station 72 ATTACHMENTS: DBE SUBCONSULTANT INFORMATION
Twining | City of Santa Clarita - Hydrogen Fueling Station 73 ** All rates, dollar values and bid totals are outlined in the "Cost Proposal" section of this RFP**

1.2. COST FILE
Submitted separately
Labor Compliance Program
Twining understands the Labor Compliance Program including prevailing wage requirements and will ensure effective program compliance.

Statement of Offer and Signature
This proposal is a firm offer for a 180-day period. The proposed work will be performed at a “not-to-exceed” price.

We accept the City’s Professional Services Agreement as written.

Michael Molina Linas Vitkus, PE, GE
Senior Director of Client Services President & Chief Operating Officer (Authorized to negotiate on behalf of the firm) (Authorized to bind the firm to contract) Equal Opportunity Employer
Twining is an Affirmative Action Participant and Equal Opportunity Employer of protected veterans and individuals with disabilities and makes employment decisions based on merit. Company policy prohibits unlawful discrimination based on race, color, creed, gender, religion, marital status, age, national origin or ancestry, physical or mental disability, pregnancy, medical condition including genetic characteristics, sexual orientation, or any other consideration made unlawful by federal, state or local laws. It also includes discrimination based on a perception that someone has any of those characteristics or is associated with a person who has or is perceived as having any of those characteristics. All such discrimination is unlawful. Twining is committed to compliance with all applicable laws providing equal employment opportunities.

Insurance Statement
Twining has reviewed the insurance requirements and can comply with all the insurances requirements of the City.

Performance Schedule
Twining is able to comply with the proposed or required performance schedule and working days/hours for this project.

Twining | City of Santa Clarita - Hydrogen Fueling Station 74

STATEMENT OF OFFER AND SIGNATURE
Twining | City of Santa Clarita - The Rinks 75
Grounded in Safety, Built on Sustainability

Form 1 - Notice to Proposers Regarding Contractual Requirements Twining | City of Santa Clarita - Hydrogen Fueling Station 39 ATTACHMENTS: REQUIRED FORMS