1879 Portola Road, Suite G
Ventura CA 93003
Tel 805.644.5100
Fax 562.426.6424
City of Santa Clarita
Materials Testing and Inspection Services
for Overlay and Slurry Seal Projects
(Annual Overlay 23-24)
Tel 805.644.5100
Fax 562.426.6424
1879 Portola Road, Suite G
Ventura CA 93003
April 3, 2024
Proposal No. 24-0659
Ramiro Fuentes
City of Santa Clarita
Public Works - Capital Improvement Projects
23920 Valencia Boulevard, #120
Santa Clarita, CA 91355
Subject: Materials Testing and Inspection Services for Overlay and Slurry Seal Projects (Annual Overlay 2023-2024)
Dear Mr. Fuentes:
Twining, Inc. (Twining) is pleased to present our proposal and qualifications for the 2023-2024 Annual Overlay Projects to the City of Santa Clarita (City). We understand that the City is seeking a certified professional engineering firm with a credentialed asphalt and concrete materials testing lab. The City’s objectives include the collection of material samples for testingas well as project inspection services. We also understand that, due to federal funding on this project, our work must comply with materials and testing and inspection as per the project plans and specifications, the City’s Quality Assurance Program (using CT methods), the latest edition of Caltrans Construction Manual, and Public Works Construction Green Book. We will work closely with the City’s Project Manager and staff to successfully complete the project and protect the interest of the City.
Our History and Knowledge of the City
Twining has been the City’s trusted advisor for over a decade. We are honored to have a strong partnership and committed to providing the high-quality work you’ve come to expect from us. We are aware that time is of the essence and that the selected consultant will be expected to start providing services as soon as the City contract is executed. We are ready and confident that we can hit the ground running, meeting the project goals effectively and efficiently.
Our history of working with the City points to other benefits to selecting Twining as the consultant for this project. We continue to find ways to save the City time and money that benefit the community you serve. The City is an important client to us and is a critical part of our business.
We strive to strengthen our partnership with the City for these projects and beyond.
Our continuous collaboration with the City on these projects and beyond has saved the City hundreds of thousands of dollars over the better part of the past decade. We understand that this contract has core projects as well as alternate options.
Being that this is a major project, we understand that this project will require a greater inspection staff. We vow to provide the City access to whatever resources they need to accomplish these goals.
As the City’s staff make-up has evolved we have continued to maintain our great working relationship and provide continuity of service during this transition within your internal operations. Twining is proud to consider ourselves part of your City’s public works family and commits to keeping your current project on track and within or under budget as we have done in the past.
Twining is an Equal
Opportunity Employer
and we have reviewed
the insurance
requirements outlined
by the City in its RFP
and can comply.
Twining, Inc. | City of Santa Clarita 2
About Twining
Twining endeavors to prove ourselves as the right choice for these projects apart from our long-standing history. In the recent past, 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 overlay project is consistent and prompt communication with the City by being available and responsive to any and all requests. Twining has the daily resources to satisfy the full range of needs required during the City’s projects 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 Thousand Oaks, Agoura Hills, and Simi Valley.
We employ nearly 150 inspectors and technicians, more than 80% of whom hold multiple inspection certifications. Our field staff is well versed in the Caltrans Local Assistance Procedures Manual, Caltrans Construction Manual, and the Greenbook. Additionally, our team will adhere to the City’s Quality Assurance Program and utilize Caltrans methods upon all testing and inspections.
We will continue to provide the following exceptional benefits to the City:
» We ha
ve served your City for years providing services identical to this proposal. Since 2011, our firm has been selected to participate in the Overlay and Slurry Seal Program for the City of Santa Clarita. Our history with your agency, extensive knowledge of the area conditions, and deep understanding of the community ensure a seamless integration of our team with the City’s staff. » We ha
ve consistently provided the City with highly-qualified and highly-skilled workforce to help the City with their project. Their strong project management skills along with their technical expertise have benefited the City in completing the projects under budget with minimum interruption and without comprise to the quality of their work and product.
» We ha
ve a proactive project management approach that is designed to provide effective solutions to control cost and support the City’s efforts to maintain and manage the construction schedule of the project by prioritizing timeliness, accuracy, and communication. » We keep our core team of inpsect
ors consistent 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 be the same this year, so they have complete synchrony with the City’s team and can fulfill the City’s requirement to 100 percent satisfaction.
We thank the City for the opportunity to present our proposal. Twining’s expertise, leadership, technical resources, and commitment to quality will make us a valuable member of your team throughout this contract. Should you have any questions related to this proposal, please contact Dr. Amir Ghavibazoo at 1879 Portola Road, Suite G, Ventura, California 93003, mobile number at 562.900.5258, or email at [email protected].
Sincerely,
Amir Ghavibazoo, PhD
Project Manager/Engineering Oversight
Mariel Attento Rhorer
Vice President of Client Development
Twining, Inc. | City of Santa Clarita 3
Twining, Inc. | City of Santa Clarita 4
1. QUALIFICATIONS OF
FIRM AND ASSIGNED STAFF
Twining’s legacy dates back 125 years. What started as a family business in 1898 has evolved into one of California’s largest service providers of geotechnical, materials testing, and construction inspection services. Highly regarded by state and local agencies, developers, contractors, consultants, and industry for providing high-quality services that are reliable, timely, and compliant, Twining has been a central part of some of California’s most regionally significant construction projects. We employ some of the industry’s most well-known construction experts who perform research as well as consult with regulatory agencies to shape the future of construction standard practices.
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 150 inspectors, we are
unequaled in our core competencies to work on
vertical as well as horizontal construction projects:
» Geotechnical engineering
» Asphalt pavement quality assurance services
» Asphalt pavement design and materials
evaluations
» Soils and materials testing and inspection
» Specialty testing
» Mobile laboratory services
» Roofing and waterproofing consultation and
inspection
» Applied engineering and research
» Forensic evaluation
Twining has developed a strong reputation by providing
sound engineering, testing, and inspection services on
every project we undertake. We earned this reputation
knowing that the true measure of our performance rests
in the satisfaction of our clients. We approach each
project with the understanding that we are evaluated on the safety and durability of the structures and pavements we test and inspect.
Twining has the unparalleled ability to service 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 all of your project needs.
This experience, along with our proven project
management system, results in a seamless flow of
communication during the entire scope of your projects
and provides you with a single point of contact to ensure that all of your project needs are met.
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 Public Works Construction Expertise
With California’s fiscal situation, aging infrastructure, and continued urban growth, our cities and counties
are faced with unique challenges. Never has it been
more critical to maximize the value of each public
works dollar spent on capital improvement than
today. The quality assurance programs that Twining
has established for public agencies throughout
the state emphasize the most cost-effective
practices utilizing industry best practices. Whether
it is a major water/wastewater project, bridge or
roadway improvement, underground utility work,
airport improvement, or goods movement project,
Twining has the requisite expertise and capabilities
to effectively establish and maintain a quality
assurance program that is in strict compliance with
the local assistance procedures manual (LAPM) as
well as state and federal mandates.
Twining provides the following services for local
agencies:
» Initial engineering design and evaluation
» Specification development and review
» Materials review and verification for acceptance
» Public works inspection
» Source inspection
» Acceptance laboratory testing and evaluation
» Federal compliance
» Final quality assurance report and project closeout
Twining, Inc. | City of Santa Clarita 5
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Innovative Pavement Design
Caught between budget constraints and the need for
reliable, innovative, and cost-effective engineering
solutions is an ongoing reality for local agencies.
Twining has been providing pavement engineering and
materials evaluation services on flexible pavement
projects for decades. Our highly specialized and
dedicated team of experts provides comprehensive
pavement engineering services that utilize the newest
pavement rehabilitation technologies to effectively
deliver our clients the service life they expect of their pavements at a construction cost that may be less
than traditional methods.
Twining is closely involved with hot mix asphalt
industry associations and government agencies that
keep our engineers on the pulse of new and upcoming
technologies. While we have a comprehensive
understanding of traditional methods and designs, we
do not default to textbook solutions for our clients.
Instead, we tailor our recommendations to include
new flexible pavement materials that can be used
most effectively and economically. Whether it is a
highly traveled arterial roadway requiring high stability in intersections, or a collector street connecting a
residential area to the neighborhood and community
service facilities, Twining Infrastructure has the
solution.
Twining routinely assesses current pavement
conditions and identifies the causes of pavement
distress. Using the Falling Weight Deflectometer
(FWD), coring, ground penetrating radar (GPR), and
dynamic cone penetrometer testing, we are able to
assess subgrade conditions and determine the load-
carrying capacity of in-place pavement. Our efforts
can determine the remaining service life of pavement
and identify options for rehabilitation. Supported by
Twining’s sophisticated laboratories, our expert staff
has the ability to design asphalt concrete mixtures to
meet either state or local specification requirements.
We routinely develop hot mix asphalt designs consisting of the following materials:
» Polymer-modified binders
» Rubberized hot mix asphalt
» Warm mix asphalt research and development
» Hot mix asphalt using high amounts of recycled asphalt concrete
» FAA Marshall designs
» Superpave designs
Twining also performs production quality and strength and mix for:
» Asphalt content
» Gradation
» Stability
» Hamburg wheel tracking
» Project specific volumetrics
The proper structural section design for flexible pavement, as well as the asphalt concrete mixture type, is crucial to its performance and longevity. Poor design can result in early failures, substandard performance, and repairs that can quickly become costly. At Twining Infrastructure, we are committed to helping agencies design and implement
the most appropriate, durable pavement solutions. Our
extensive experience providing quality assurance and
quality control services in the field gives us unique insight and allows us to provide recommendations that are easily implemented and reliable.
Twining professionals are members of the American
Public Works Association, the Asphalt Pavement
Association, the Rubber Pavements Association, the
National Asphalt Pavement Association, and the Caltrans expert task group on flexible pavements. They have
vast knowledge of hot mix asphalt materials and the
constraints during production, as well as experience
managing comprehensive quality assurance and quality
control programs.
Twining, Inc. | City of Santa Clarita 6
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Laboratory Testing Capabilities. All laboratory testing operations are overseen by a registered geotechnical engineer. With the large amount of construction-related, time- sensitive work that Twining performs, our laboratories understand the importance of and effectively accomplishes efficient turnaround times for testing.
Materials Testing Laboratory
Twining maintains a network of state of the art
laboratories throughout California. In addition to our
permanent laboratories, we own and operate a fleet
of mobile laboratories that allow us to conveniently
service projects throughout the state. Our fully-
accredited geotechnical engineering laboratories are
equipped to perform the standard tests needed in
geotechnical engineering evaluations, including but
not limited to:
» In situ density and
moisture content
» Atterberg limits
» Sieve Analysis
» Maximum Dry Density
» Direct Shear
» Consolidation
Materials Testing and Inspection Expertise
With our state-of-the-art equipment and conveniently
located laboratories, we are able to perform the
necessary testing on projects throughout California. We maintain a rigorous training program for our experienced staff of testing technicians, and are recognized by
numerous agencies including Caltrans, Army Corps
of Engineers, American Association of State Highway
and Transportation Officials (AASHTO), Cement and
Concrete Reference Laboratory (CCRL) and International
Accreditation Service, Inc. (IAS) along with many cities and counties. Our expert professionals continue to
work with Caltrans to define effective applications of
construction materials for roadway projects and revise
standard specifications for proportioning concrete
for pavements and other elements of transportation
infrastructure. Our clients depend on us to reliably
deliver services that strictly follow Green Book and
Caltrans and FHWA regulations. We are proud of our
legacy of delivering high-quality services that subscribe to all applicable standards.
We have held multiple on-call contracts representing
Caltrans providing materials testing services on behalf of the State.
» Expansion Index
» Sand Equivalent
» Cleanness Value
» Soundness
» R-Value
Twining, Inc. | City of Santa Clarita 7
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
CITY OF
SANTA CLARITA
Annual Overlay and Slurry Seal Projects
Twining has held the Annual Overlay and Slurry Seal contract with the City for multiple fiscal year. Under these agreements, we perform construction materials testing and inspection services for the annual overlay and slurry seal program.
Twining performs construction materials testing and inspection at various project sites and as well as the batch plant. Our firm performs mix design verification and laboratory testing.
Twining also assists the City in performing slurry seal placement inspection and testing. During plant inspection services for this project, Twining provides asphalt binder plant inspection as well and identifies viscosity and blending issues experienced by the supplier. Through this proactive inspection approach, not a single out of compliance load of rubberized asphalt concrete has been shipped to the project.
Our team coordinates with the construction team and the City public works inspector to resolve issues during construction as needed. Our team inspects and verifies that all construction materials are in total compliance with applicable rules and regulations.
Public Agency Name
» City of Santa Clarita
Location
» Santa Clarita, CA
Year Completed
» Ongoing
Reference
» Robert Newman
» 23920 Valencia Boulevard
Suite 120, Santa Clarita,
CA 91355
» 661.284.1429
Project Type
» Street Rehabilitation
Twining Staff
» Amir Ghavibazoo, PhD
» Jeff Tawakoli, PE
» Eddie Perez
Twining, Inc. | City of Santa Clarita 8
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
CITY OF
SIMI VALLEY
Annual Major Streets Pavement Program
The City of Simi Valley conducts an annual major and minor street rehabilitation program on many of their arterial and residential streets. The project consisted of residential pavement rehabilitation consisting of a conventional hot mix asphalt overlay, curb and gutter repair, and a type I slurry seal on select residential streets.
Twining was retained as the quality assurance laboratory for the city and provided placement inspection, field compaction testing, batch plant inspection, laboratory testing, and slurry seal sampling and testing.
Public Agency Name
» City of Simi Valley
Location
» Simi Valley, CA
Year Completed
» 2019
Reference
» Mansour Moradi
» 2929 Tapo Canyon Road
Simi Valley, CA 93063
» 805.583.6891
Project Type
» Street Rehabilitation
Twining Staff
» Amir Ghavibazoo, PhD
» Jeff Tawakoli, PE
» Eddie Perez
Twining, Inc. | City of Santa Clarita 9
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Twining, Inc. | City of Santa Clarita 10
CITY OF
THOUSAND OAKS
Annual Rubberized Asphalt Concrete Rehab
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 towards 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, and perform pavement destructive testing and assist with pavement deflection testing for future pavement designs.
The City used Terminal Blend Rubberized Emulsion Aggregate Slurry Seal (REAS), using black rock source. The black rock will help the slurry seal to retain its black color for a longer period of time and the rubberized emulsion will add to the durability of the slurry seal product.
Twining has also provided annual materials certifications and labor compliance interviews throughout the projects.
Awards
» 2019 Construction Management Association of America, Southern California Chapter Public Works Project Achievement Award
Public Agency Name
» City of Thousand Oaks
Location
» Thousand Oaks, CA
Year Completed
» Ongoing
Reference
» Mike Tohidian
» 2100 Thousand Oaks
Boulevard, Thousand Oaks,
CA 91362
» 805.449.2516
Project Type
» Street Rehabilitation
Twining Staff
» Amir Ghavibazoo, PhD
» Jeff Tawakoli, PE
» Eddie Perez
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Project Manager/
Engineering Oversight
Amir Ghavibazoo, PhD
Quality Control Manager/
Engineer
Jeff Tawakoli, PE
Laboratory Technicians
Laboratory Manager
Glenn Taylor*
Lead Public Works Inspector
Eddie Perez
Additional Public Works
Inspectors
Alexandra Brown*
Jack Gains*
Resumes available upon request
Firm’s principal contact
*
Twining, Inc. | City of Santa Clarita 11
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Twining, Inc. | City of Santa Clarita 12
AMIR GHAVIBAZOO
Dr. Amir Ghavibazoo is Twining’s Director of Asphalt Engineering and Pavement Design and has served as project manager for this contract for more than five years. He directs and works on pavement design, highway design, engineering specifications, and consulting services. Amir’s graduate studies included Pavement Management Systems (MicroPaver), pavement evaluation and pavement rehabilitation strategies. He works closely with cities statewide to develop unique and specialized mix designs, pavement construction inspections, and pavement design solutions.
Amir’s specialized knowledge allows our firm to offer creative and unique pavement solutions to fit any budget and other goals.
City of Santa Clarita, Annual Overlay & Slurry Seal
(Multiple Years)
Each year, streets are evaluated and identified for their need for rehabilitation or maintenance treatments. These projects include asphalt overlay, micro-surfacing, and slurry seal treatments to streets in various areas of the City. Twining performed quality assurance testing and inspection, Amir serves as project manager for this job, coordinating all required testing and inspection and reviewing test results.
City of Simi Valley, Erringer Road at Cochran Street
This project consisted of the construction of a northbound right turn lane on Erringer Road at Cochran Street. Twining performed surface and subsurface soils investigation, testing, evaluation, geotechnical inspection, materials testing for conventional and rubberized asphalt concrete pavement, structural section evaluations for pavement defection testing, and laboratory testing services. Amir served as the pavement engineer. He reviewed the test data and prepared recommendations to the City.
County of Ventura, Route 118 (07-296704)
Twining performed quality control testing on route 118 in Ventura County. Amir served as project manager and project engineer. He was responsible for the oversight of all daily sampling and testing, as well as providing technical comments in regard to possible issues, and suggesting a solution to the client based on the test results.
Overview
» Years’ Experience: 2014 – Present
Education
» PhD, Civil and Environmental
Engineering, North Dakota State
University
» MS, Railways Engineering, Iran
University of Science and Technology,
Tehran, Iran
» BS, Industrial Engineering, University
of Technology, Tehran, Iran
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Twining, Inc. | City of Santa Clarita 13
JEFF TAWAKOLI
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.
City of Santa Clarita, Annual Overlay & Slurry Seal
(Multiple Years)
Each year, streets are evaluated and identified for their need for rehabilitation or maintenance treatments. These projects include asphalt overlay, micro-surfacing, and slurry seal treatments to streets in various areas of the City. Twining performs quality assurance testing and inspection, Jeff serves as quality control manager throughout this program, providing engineering support out of our local Ventura office.
City of Calabasas, Lost Hills Road Interchange
Improvement Project
This $25 million project included the expansion of the existing Lost Hills Road/US-101 overcrossing from two lanes to five lanes. Jeff served as the project manager, overseeing the delivery of all of our services, dispatching inspectors, reviewing all reports, and acting as the single point of contact for the project team.
City of Simi Valley, Erringer Road at Cochran Street
This project consisted of the construction of a northbound right turn lane on Erringer Road at Cochran Street. Twining performed surface and subsurface soils investigation, testing, evaluation, geotechnical inspection, materials testing for conventional and rubberized asphalt concrete pavement, structural section evaluations for pavement deflection testing and laboratory testing services. Jeff served as the project manager, providing oversight of materials testing for both laboratory and field services. He was responsible for coordinating schedules, managing budgets, reviewing inspection in the field, reviewing and approving all field inspection and laboratory reports, and attending all project meetings with City.
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
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Twining, Inc. | City of Santa Clarita 14
EDDIE PEREZ
Eddie Perez brings over 13 years of technical expertise as a public works construction and quality assurance manager. He serves as the City’s eyes and ears on public works construction. He routinely attends construction progress meeting with City officials and the contractors. He reviews and insures adherence to construction plans and project specifications. His experience encompasses all aspects of public works construction with special emphasis on roadway projects that include utility work ADA ramp remove and replace, street signal loop and signal install and roadway striping in addition to asphalt and concrete paving. He is intimately familiar with Caltrans and Green Book Standards and serves as an extension of City resources.
City of Santa Clarita, Annual Overlay & Slurry Seal
(Multiple Years)
Twining is contracted by the City to perform construction materials testing and inspection services for the annual overlay and slurry seal program. Twining performs construction materials testing and inspection at various project sites and the batch plant. Our firm performs mix design verification and laboratory testing. Twining also assists the City in performing slurry seal placement inspection and testing. Eddie serves as the lead public works inspector. He attends construction progress meetings, and review and ensures adherence to plans and specifications.
City of Simi Valley, Annual Pavement Rehabilitation
The City of Simi Valley conducts an annual major and minor street rehabilitation program on many of their arterial and residential streets. The project consisted of residential pavement rehabilitation consisting of a conventional hot mix asphalt overlay, curb and gutter repair, and a type I slurry seal on select residential streets. Eddie served as an inspector for this project. He tested the hot mix asphalt to ensure compliance with standards.
County of San Diego, Slurry Seal Resurfacing
(Multiple Years)
Twining was selected to provide testing and inspection services for the slurry seal resurfacing projects throughout the County of San Diego. Twining provided observation during slurry seal placement, laboratory testing of slurry seal, aggregate, scrub seal emulsion, and shoulder backing, HMA quality control, and engineering support for this project. Eddie served as an inspector on this project.
Overview
» Years’ Experience: 2011 – Present
Current Licenses Held
» ACI Concrete Field Testing Technician
Grade I
» Nuclear Density Gauge Operator
» Caltrans Certifications 125
» OSHA Safety 10 Hour
SECTION 1: QUALIFICATIONS OF FIRM AND ASSIGNED STAFF
Twining, Inc. | City of Santa Clarita 15
2. WORK STATEMENT
It is our understanding that the project consists of providing quality assurance construction materials testing and inspection services for the City’s overlay programs as outlined in the RFP’s scope of work per the following standards: City of Santa Clarita QAP; Construction Manual, current edition; CALOSHA Construction Safety Orders, current edition; Standard Specifications of Public Works, Greenbook current edition; Standard Plans of Public Works, current edition; and exhibits attached to the City’s RFP . Twining understands that we will be responsible for the testing of asphalt and concrete as well as providing project inspection. The following is our proposed plan of study.
Task 1: Engineering Support During
Overlay Project
Subtask 1: On-call support to the City’ s project
manager
Output: Available from project’s inception through
completion via phone, email, and in-person
meetings in order to provide the City’s project
manager answers to questions that come up during
the project. These services are provided through
Twining’s project manager and lead public works
inspector.
Subtask 2: Submittal review for materials to be
used by the contractor on the project
Output: Timely turnaround of materials submittal
reviews. The City’s project manager provides
contractor submittals to Twining’s project manager
for review and acceptance with respect to the
project specifications and plans.
Subtask 3: Attend meetings throughout the project
Output: Twining’s project manager and senior field
inspector will be available and will attend meetings
with the City’s project team whenever requested
during the project.
Subtask 4: Timely review of inspection and testing
results during the project; preparation of daily
reports for the City’ s project manager
Output: Twining’s project manager will schedule
laboratory tests promptly and will review and provide
testing and inspection reports to the City’s project
manager. Any non-compliant results will be highlighted, and discussion/recommendations will be provided to the
City when requested or when necessary.
Task 2: Field Support During Overlay
Project
Subtask 1: Public works inspection services
Output: Available throughout the project to support the City’s project manager and inspection team with any
supplemental inspection services during the project.
These services have been provided during past overlay
projects with the City and can be provided whenever the City deems it necessary.
Subtask 2: Asphalt inspection services
Output: Twining will provide laydown inspection and
compaction testing of the asphalt paving activities
throughout the overlay project. If the City requires
observation during grinding operations, we will provide resources during this time, as well. The inspection team will observe and document all pavement activities at
the City’s request and in accordance with the project
specifications. Plant inspection will be conducted
simultaneously throughout the paving day and samples
SECTION 2: WORK STATEMENT
of the asphalt will be obtained at coordinated intervals from both the plant and the field and transported to our lab for all the necessary testing. Plant inspection will ensure that production of asphalt is being conducted
per the project specifications and meets Greenbook and
Caltrans standards.
Subtask 3: Asphalt Coring and Testing
Output: Twining will provide a technician to core the
asphalt once per 250 tons and transport the cores to
the laboratory for timely testing to calculate the daily compaction of the asphalt material being placed.
Task 3: Materials Testing During Overlay
Project
Subtask 1: Laboratory testing of asphalt material
Output: Twining’s certified laboratory will be responsible for providing testing of the asphalt material to
ensure it meets the specifications of the project. The
material will be tested for asphalt content, gradation, moisture content, density, stability, air voids, and sand equivalency (raw aggregate at the plant). Acceptance
of the material is typically based on asphalt content,
gradation, and stability testing. Core testing will be
provided daily to ensure that asphalt compaction
requirements are being met.
Task 4: QA Documentation and Reporting
Subtask 1: Daily and final quality assurance reporting
Output: Twining’s project manager will be responsible
for reviewing daily field and laboratory activities and preparing reports and providing all documentation to
the City’s project manager. Upon completion of the
project, a final quality assurance report will be prepared and provided to the City for its records.
Twining, Inc. | City of Santa Clarita 17
3. SUB-CONSULTANTS
Twining is able to self-perform all work identified in the RFP and does not anticipate the use of subconsultants for this contract.
Thank you for your consideration.
Twining, Inc. | City of Santa Clarita 1
City of Santa Clarita
Materials Testing and Inspection Services for
Overlay and Slurry Seal Projects
(Annual Overlay 2023-2024)
COST FILE
Twining, Inc. | City of Santa Clarita 2
COST FILE
STATEMENT OF OFFER
This proposal is a firm offer for a 90-day period, and the proposed work will be performed at a “not-to-exceed” price. Twining has reviewed the City’s professional services agreement (Exhibit 2) and finds the agreement acceptable as written. Twining’s A.M Best Rating is A.M. Best Rating is A-/IX (a point below your requirement).
Mariel Attento Rhorer
Vice President of Client Development
(Authorized to bind the firm)
Twining, Inc. | City of Santa Clarita 3
COST FILE
Sub Project Name Engineering Inspection Material Testing Total 240049_Overlay A_QA Testing Program - $89,910.00 $6,268.00 $96,178.00 240049_Overlay B_QA Testing Program - $183,010.00 $53,278.00 $236,288.00 240049_Overlay B_QA Testing Program - Alt 1 - $19,581.00 $10,605.00 $30,186.00 240049_Overlay B_QA Testing Program - Alt 2 - $19,581.00 $10,787.00 $30,368.00 240049_Overlay C_QA Testing Program - $183,010.00 $36,041.00 $219,051.00 240049_Overlay D_QA Testing Program - $74,170.00 $41,763.00 $115,933.00 240049_Slurry_QA Testing Program - $114,380.00 $15,856.00 $130,236.00 240049 - Traffic Engineering Services $167,900.00 - - $167,900.00 Total $1,026,140.00
City of Santa Clarita - 2023 -24 Annual Overlay Cost Estimate Summary Twining, Inc. | City of Santa Clarita 4
COST FILE
City of Santa Clarita
2023-24 Annual Overlay A Project
City Project No. M0153
Quality Assurance Testing Program
Inspection, Sampling, and Quality Assurance Management - Base Bid Estimated
Number of Hours
50 110
70 100
100
100
45 45
45 30
5 Daysd
a All inspectors, samplers, testers, and labs must posess all current Caltrans certifications relevant to their position. b Hourly cost includes travel of inspector/technician to and from the jobsite as well as all sample transportation costs. c Includes travel, coring, and sample transportation only, testing of cores is listed as a separate item. d Rate for coring technician is based on a per day basis. $118.00
$118.00
$152.00
$118.00
Project Management/Engineering Oversite: Responsibilities include project oversite and engineering support.
$128.00Public Works Inspection: Responsibilities include providing full-time inspection to the City.
$118.00
$118.00
$192.00 $256.00 $14,080.00
$180.00 - - $9,000.00
--- $1,740.00
$3,120.00
---
$104.00
$348.00
-
$177.00
$177.00
$177.00
-
$236.00
$236.00
Extended Cost
$10,640.00
$11,800.00$177.00
$177.00
Time Rate
Double
$236.00
-
$11,800.00
$11,800.00
Total Cost $89,910.00
$5,310.00
$5,310.00
$5,310.00
$236.00
$236.00
$236.00
-
Unit Costb
Laydown Inspector (4 hour day) : Responsibilities include mat inspection and sampling.
Compaction Inspector (4 hour day): Responsibilities include monitoring compaction and temperatures behind the roller.
Position a
Overtime Rate
$118.00
$177.00
Coring Technicianc: Responsibilities include the extraction of cores and the filling of holes following extraction.
QC Manager/Engineer: Responsibilities include oversight of Quality Assurance operations and review of test results.
Laydown Inspector (8 hour day) : Responsibilities include mat inspection and sampling
Compaction Inspector (8 hour day): Responsibilities include monitoring compaction and temperatures behind the roller.
Plant Inspector (8 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt.
Clerical
Plant Inspector (4 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt.
Twining, Inc. | City of Santa Clarita 5
COST FILE
City of Santa Clarita
2023-24 Annual Overlay A Project
City Project No. M0153
Quality Assurance Testing Program
Materials Testing - Base Bid
Test Method(s) Quality Characteristic
Minimum Sampling
and Testing
Frequency
Location of Sampling R&R
Areasa D2 AC Total Unit Cost Extended Cost
CT 202 Aggregate Gradation 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 2 2 4 $235 $940
CT 217 Sand Equivalent 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 2 2 4 $177 $708
CT 382 Asphalt Content 1 Per 750 Tons,
Minimum 1 Per Day Mat Behind Paverb 2 2 4 $235 $940
Coresc Percent Compactiond,e 1 Per 250 Tons,
Minimum 3 Per Day Compacted Mat 6 6 12 $91 $1,092
CT 309 Rice Density 1 Per Day Mat Behind Paver 2 2 4 $177 $708 CT 226 or CT 370 HMA Moisture Content 1 Per Day Mat Behind Paver 2 2 4 $0 CT 366 Stabilometer Valuef 1 Per Day Mat Behind Paver 2 2 4 $235 $940 CT 367g Air Voids Contentf 1 Per Day Mat Behind Paver 2 2 4 $235 $940 a Sample digout material at the regular frequency.
b Exact tonnage and location of sample to be determined by the materials sampling Random Sampling Plan and coring Random Sampling Plan. c Item includes the cost of testing core specimens in the lab. d Though core samples are used for acceptance testing, monitoring of compaction by use of a nuclear gauge shall be required throughout the paving day. e Compaction shall be determined using the formula 100 x (Bulk Specific Gravity (CT 308)) / (Maximum Theoretical Specific Gravity (CT 309)). f Report the average of 3 tested briquettes from a single sample. g Use CT 309 to determine maximum theoretical specific gravity in place of the CT 367 calculated maximum theoretical specific gravity. h Test must be performed by an AASHTO certified laboratory. i No testing of binder will be required except at the discression of the engineer, sample and store all material until the engineer approves disposal. $6,268Total Cost
Twining, Inc. | City of Santa Clarita 6
COST FILE
City of Santa Clarita
2023-24 Annual Overlay B Project
City Project No. M0153
Quality Assurance Testing Program
Inspection, Sampling, and Quality Assurance Management - Alt 2 Estimated
Number of Hours
15 20
15 18
18 18
9 9
9 7
5 Daysd
a All inspectors, samplers, testers, and labs must posess all current Caltrans certifications relevant to their position. b Hourly cost includes travel of inspector/technician to and from the jobsite as well as all sample transportation costs. c Includes travel, coring, and sample transportation only, testing of cores is listed as a separate item. d Rate for coring technician is based on a per day basis.
Coring Technicianc: Responsibilities include the extraction of cores and the filling of holes following extraction. $348.00 --- --- $1,740.00 Total Cost $19,581.00
Plant Inspector (4 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt. $118.00 $177.00 $236.00 $1,062.00 Clerical $104.00 - - $728.00
Laydown Inspector (4 hour day) : Responsibilities include mat inspection and sampling. $118.00 $177.00 $236.00 $1,062.00
Compaction Inspector (4 hour day): Responsibilities include monitoring compaction and temperatures behind the roller. $118.00 $177.00 $236.00 $1,062.00 Compaction Inspector (8 hour day): Responsibilities include monitoring compaction and temperatures behind the roller. $118.00 $177.00 $236.00 $2,124.00 Plant Inspector (8 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt. $118.00 $177.00 $236.00 $2,124.00 QC Manager/Engineer: Responsibilities include oversight of Quality Assurance operations and review of test results. $153.00 - - $2,295.00 Laydown Inspector (8 hour day) : Responsibilities include mat inspection and sampling $118.00 $177.00 $236.00 $2,124.00
Project Management/Engineering Oversite: Responsibilities include project oversite and engineering support. $180.00 - - $2,700.00 Public Works Inspection: Responsibilities include providing full-time inspection to the City. $128.00 $192.00 $256.00 $2,560.00 Position a Double
Unit Costb Overtime Rate Time Rate Extended Cost
Twining, Inc. | City of Santa Clarita 7
COST FILE
City of Santa Clarita
2023-24 Annual Overlay B Project
City Project No. M0153
Quality Assurance Testing Program
Materials Testing - Alt 2
Test Method(s) Quality Characteristic Minimum Sampling and Testing Frequency Location of Sampling 1/2"
HMA D2 AC R&R
Areasa Total Unit Cost Extended Cost
CT 202 Aggregate Gradation 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 2 1 4 7 $235 $1,645
CT 217 Sand Equivalent 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 2 1 4 7 $177 $1,239
CT 382 Asphalt Content 1 Per 750 Tons,
Minimum 1 Per Day Mat Behind Paverb 2 1 4 7 $235 $1,645 Coresc Percent Compactiond,e 1 Per 250 Tons,
Minimum 3 Per Day Compacted Mat 6 3 10 19 $91 $1,729
CT 309 Rice Density 1 Per Day Mat Behind Paver 2 1 4 7 $177 $1,239 CT 226 or CT 370 HMA Moisture Content 1 Per Day Mat Behind Paver 2 1 4 7 $0 CT 366 Stabilometer Valuef 1 Per Day Mat Behind Paver 2 1 4 7 $235 $1,645 CT 367g Air Voids Contentf 1 Per Day Mat Behind Paver 2 1 4 7 $235 $1,645 a Sample digout material at the regular frequency.
b Exact tonnage and location of sample to be determined by the materials sampling Random Sampling Plan and coring Random Sampling Plan. c Item includes the cost of testing core specimens in the lab. d Though core samples are used for acceptance testing, monitoring of compaction by use of a nuclear gauge shall be required throughout the paving day. e Compaction shall be determined using the formula 100 x (Bulk Specific Gravity (CT 308)) / (Maximum Theoretical Specific Gravity (CT 309)). f Report the average of 3 tested briquettes from a single sample. g Use CT 309 to determine maximum theoretical specific gravity in place of the CT 367 calculated maximum theoretical specific gravity. h Test must be performed by an AASHTO certified laboratory. i No testing of binder will be required except at the discression of the engineer, sample and store all material until the engineer approves disposal.
Estimated Number of Tests
Total Cost $10,787
Twining, Inc. | City of Santa Clarita 8
COST FILE
City of Santa Clarita
2023-24 Annual Overlay C Project
City Project No. M0153
Quality Assurance Testing Program
Inspection, Sampling, and Quality Assurance Management - Base Bid Estimated
Number of Hours
110
230
140
200
200
200
85 85
85 60
15 Daysd
a All inspectors, samplers, testers, and labs must posess all current Caltrans certifications relevant to their position. b Hourly cost includes travel of inspector/technician to and from the jobsite as well as all sample transportation costs. c Includes travel, coring, and sample transportation only, testing of cores is listed as a separate item. d Rate for coring technician is based on a per day basis. $118.00
$118.00
$153.00
$118.00
Project Management/Engineering Oversite: Responsibilities include project oversite and engineering support.
$128.00Public Works Inspection: Responsibilities include providing full-time inspection to the City.
$118.00
$118.00
$192.00 $256.00 $29,440.00
$180.00 - - $19,800.00
--- $5,220.00
$6,240.00
---
$104.00
$348.00
-
$177.00
$177.00
$177.00
-
$236.00
$236.00
Extended Cost
$21,420.00
$23,600.00$177.00
$177.00
Time Rate
Double
$236.00
-
$23,600.00
$23,600.00
Total Cost $183,010.00
$10,030.00
$10,030.00
$10,030.00
$236.00
$236.00
$236.00
-
Unit Costb
Laydown Inspector (4 hour day) : Responsibilities include mat inspection and sampling.
Compaction Inspector (4 hour day): Responsibilities include monitoring compaction and temperatures behind the roller.
Position a
Overtime Rate
$118.00
$177.00
Coring Technicianc: Responsibilities include the extraction of cores and the filling of holes following extraction.
QC Manager/Engineer: Responsibilities include oversight of Quality Assurance operations and review of test results.
Laydown Inspector (8 hour day) : Responsibilities include mat inspection and sampling
Compaction Inspector (8 hour day): Responsibilities include monitoring compaction and temperatures behind the roller.
Plant Inspector (8 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt.
Clerical
Plant Inspector (4 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt.
Twining, Inc. | City of Santa Clarita 9
COST FILE
City of Santa Clarita
2023-24 Annual Overlay C Project
City Project No. M0153
Quality Assurance Testing Program
Materials Testing - Base Bid
Test Method(s) Quality Characteristic
Minimum Sampling
and Testing
Frequency
Location of Sampling ARHM R&R
Areasa C2 AC D2 AC Total Unit Cost Extended Cost
CT 202 Aggregate Gradation 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 8 5 8 2 23 $235 $5,405
CT 217 Sand Equivalent 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 8 5 8 2 23 $177 $4,071
CT 382 Asphalt Content 1 Per 750 Tons,
Minimum 1 Per Day Mat Behind Paverb 8 5 8 2 23 $235 $5,405 Coresc Percent Compactiond,e 1 Per 250 Tons,
Minimum 3 Per Day Compacted Mat 24 15 24 6 69 $91 $6,279 CT 309 Rice Density 1 Per Day Mat Behind Paver 8 5 8 2 23 $177 $4,071 CT 226 or CT 370 HMA Moisture Content 1 Per Day Mat Behind Paver 8 5 8 2 23 $0 CT 366 Stabilometer Valuef 1 Per Day Mat Behind Paver 8 5 8 2 23 $235 $5,405 CT 367g Air Voids Contentf 1 Per Day Mat Behind Paver 8 5 8 2 23 $235 $5,405 a Sample digout material at the regular frequency.
b Exact tonnage and location of sample to be determined by the materials sampling Random Sampling Plan and coring Random Sampling Plan. c Item includes the cost of testing core specimens in the lab. d Though core samples are used for acceptance testing, monitoring of compaction by use of a nuclear gauge shall be required throughout the paving day. e Compaction shall be determined using the formula 100 x (Bulk Specific Gravity (CT 308)) / (Maximum Theoretical Specific Gravity (CT 309)). f Report the average of 3 tested briquettes from a single sample. g Use CT 309 to determine maximum theoretical specific gravity in place of the CT 367 calculated maximum theoretical specific gravity. h Test must be performed by an AASHTO certified laboratory. i No testing of binder will be required except at the discression of the engineer, sample and store all material until the engineer approves disposal.
Estimated Number of Tests
$36,041Total Cost
Twining, Inc. | City of Santa Clarita 10
COST FILE
City of Santa Clarita
2023-24 Annual Overlay D Project
City Project No. M0153
Quality Assurance Testing Program
Inspection, Sampling, and Quality Assurance Management - Alt 1 Estimated
Number of Hours
60 90
60 70
70 70
35 35
35 20
10 Daysd
a All inspectors, samplers, testers, and labs must posess all current Caltrans certifications relevant to their position. b Hourly cost includes travel of inspector/technician to and from the jobsite as well as all sample transportation costs. c Includes travel, coring, and sample transportation only, testing of cores is listed as a separate item. d Rate for coring technician is based on a per day basis.
Coring Technicianc: Responsibilities include the extraction of cores and the filling of holes following extraction. $348.00 --- --- $3,480.00 Total Cost $74,170.00
Plant Inspector (4 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt. $118.00 $177.00 $236.00 $4,130.00 Clerical $104.00 - - $2,080.00
Laydown Inspector (4 hour day) : Responsibilities include mat inspection and sampling. $118.00 $177.00 $236.00 $4,130.00
Compaction Inspector (4 hour day): Responsibilities include monitoring compaction and temperatures behind the roller. $118.00 $177.00 $236.00 $4,130.00 Compaction Inspector (8 hour day): Responsibilities include monitoring compaction and temperatures behind the roller. $118.00 $177.00 $236.00 $8,260.00 Plant Inspector (8 hour day): Resonsibilities include inspection and sampling of aggregates, binders, and hot mix asphalt. $118.00 $177.00 $236.00 $8,260.00 QC Manager/Engineer: Responsibilities include oversight of Quality Assurance operations and review of test results. $152.00 - - $9,120.00 Laydown Inspector (8 hour day) : Responsibilities include mat inspection and sampling $118.00 $177.00 $236.00 $8,260.00
Project Management/Engineering Oversite: Responsibilities include project oversite and engineering support. $180.00 - - $10,800.00 Public Works Inspection: Responsibilities include providing full-time inspection to the City. $128.00 $192.00 $256.00 $11,520.00 Position a Double
Unit Costb Overtime Rate Time Rate Extended Cost
Twining, Inc. | City of Santa Clarita 11
COST FILE
City of Santa Clarita
2023-24 Annual Overlay D Project
City Project No. M0153
Quality Assurance Testing Program
Materials Testing - Base Bid
Test Method(s) Quality Characteristic
Minimum Sampling
and Testing
Frequency
Location of Sampling ARHM R&R
Areasa C2 AC D2 AC Total Unit Cost Extended Cost
CT 202 Aggregate Gradation 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 8 5 12 2 27 $235 $6,345
CT 217 Sand Equivalent 1 Per 750 Tons,
Minimum 1 Per Day At Plantb 8 5 12 2 27 $177 $4,779
CT 382 Asphalt Content 1 Per 750 Tons,
Minimum 1 Per Day Mat Behind Paverb 8 5 12 2 27 $235 $6,345 Coresc Percent Compactiond,e 1 Per 250 Tons,
Minimum 3 Per Day Compacted Mat 24 15 30 6 75 $91 $6,825 CT 309 Rice Density 1 Per Day Mat Behind Paver 8 5 12 2 27 $177 $4,779 CT 226 or CT 370 HMA Moisture Content 1 Per Day Mat Behind Paver 8 5 12 2 27 $0 CT 366 Stabilometer Valuef 1 Per Day Mat Behind Paver 8 5 12 2 27 $235 $6,345 CT 367g Air Voids Contentf 1 Per Day Mat Behind Paver 8 5 12 2 27 $235 $6,345 a Sample digout material at the regular frequency.
b Exact tonnage and location of sample to be determined by the materials sampling Random Sampling Plan and coring Random Sampling Plan. c Item includes the cost of testing core specimens in the lab. d Though core samples are used for acceptance testing, monitoring of compaction by use of a nuclear gauge shall be required throughout the paving day. e Compaction shall be determined using the formula 100 x (Bulk Specific Gravity (CT 308)) / (Maximum Theoretical Specific Gravity (CT 309)). f Report the average of 3 tested briquettes from a single sample. g Use CT 309 to determine maximum theoretical specific gravity in place of the CT 367 calculated maximum theoretical specific gravity. h Test must be performed by an AASHTO certified laboratory. i No testing of binder will be required except at the discression of the engineer, sample and store all material until the engineer approves disposal.
Estimated Number of Tests
$41,763Total Cost
Twining, Inc. | City of Santa Clarita 12
COST FILE
City of Santa Clarita
2023-24 Annual Slurry Seal Project
City Project No. M0153
Quality Assurance Testing Program
Inspection, Sampling, and Quality Assurance Management - Base Bid Estimated
Number of Hours
80 320
100
160
40 80
20 80
a All inspectors, samplers, testers, and labs must posess all current Caltrans certifications relevant to their position. b Hourly cost includes travel of inspector/technician to and from the jobsite as well as all sample transportation costs. c Includes travel, coring, and sample transportation only, testing of cores is listed as a separate item. d Rate for coring technician is based on a per day basis.
Unit Costb
Compaction Inspector (4 hour day): Responsibilities include monitoring compaction and temperatures behind the roller.
Position a
---
Overtime Rate
$118.00
-
QC Manager/Engineer: Responsibilities include oversight of Quality Assurance operations and review of test results.
Extended Cost
$15,300.00
Time Rate
Double
---
-
---
-
$40,960.00
$4,720.00
Total Cost $114,380.00
$2,360.00
$236.00
-
$9,440.00
$118.00
$14,400.00$180.00
$153.00
$128.00
$118.00 ---
Project Management/Engineering Oversite: Responsibilities include project oversite and engineering support.
Slurry Inspector (8 hour day) : Responsibilities include crackfill, mat inspection and sampling $118.00
Public Works Inspection: Responsibilities include providing full-time inspection to the City.
$177.00Compaction Inspector (8 hour day): Responsibilities include monitoring compaction and temperatures behind the roller.
$177.00
-
$192.00 $256.00
$104.00Clerical
$18,880.00
$236.00
-
Slurry Inspector (4 hour day) : Responsibilities include crackfill, mat inspection and sampling.
$8,320.00
Twining, Inc. | City of Santa Clarita 13
COST FILE
City of Santa Clarita
2023-24 Annual Slurry Seal Project
City Project No. M0153
Quality Assurance Testing Program
Materials Testing - Base Bid
Test Method(s) Quality Characteristic
Minimum Sampling and Testing
Frequency
Location of
Sampling Slurry
R&R
Areasa Total Unit Cost Extended Cost
CT 202 Aggregate Gradation 1 Per Week Stock Pile 6 2 8 $177 $1,416 CT 217 Sand Equivalent 1 Per 750 Tons, Minimum 1 Per Day At Plantb 24 8 32 $177 $5,664 CT 382 Asphalt Content 1 Per 750 Tons, Minimum 1 Per Day Mat Behind Paverb --- 8 8 $177 $1,416 Coresc Percent Compactiond,e 1 Per 250 Tons, Minimum 3 Per Day Compacted Mat --- 24 24 $91 $2,184 CT 309 Rice Density 1 Per Day Mat Behind Paver --- 8 8 $177 $1,416 CT 226 or CT 370 HMA Moisture Content 1 Per Day Mat Behind Paver --- 8 8 $0 $0 CT 366 Stabilometer Valuef 1 Per Day Mat Behind Paver --- 8 8 $235 $1,880 CT 367g Air Voids Contentf 1 Per Day Mat Behind Paver --- 8 8 $235 $1,880 AASHTO R 29 Asphalt Binder 1 Per Dayi At Plant --- --- --- a Sample digout material at the regular frequency.
b Exact tonnage and location of sample to be determined by the materials sampling Random Sampling Plan and coring Random Sampling Plan. c Item includes the cost of testing core specimens in the lab. d Though core samples are used for acceptance testing, monitoring of compaction by use of a nuclear gauge shall be required throughout the paving day. e Compaction shall be determined using the formula 100 x (Bulk Specific Gravity (CT 308)) / (Maximum Theoretical Specific Gravity (CT 309)). f Report the average of 3 tested briquettes from a single sample. g Use CT 309 to determine maximum theoretical specific gravity in place of the CT 367 calculated maximum theoretical specific gravity. h Test must be performed by an AASHTO certified laboratory. i No testing of binder will be required except at the discression of the engineer, sample and store all material until the engineer approves disposal.
Estimated Number of Tests
$15,856Total Cost
Twining, Inc. | City of Santa Clarita 14
COST FILE
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