CONTRACTOR
PREQUALIFICATION SCHEME
BITUMINOUS WORKS
GUIDELINES, CONDITIONS
AND APPLICATION FORM
DPTI– PREQUALIFICATION SCHEME
FOR BITUMINOUS WORKS
1
CONTENTS
1
1.
Introduction
2.
Application
3.
Information to be Submitted and Assessment Criteria
4.
Conditions of Prequalification
Edition: January 2015
DPTI– PREQUALIFICATION SCHEME
FOR BITUMINOUS WORKS
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PART 1: INTRODUCTION
The Department for Planning, Transport and Infrastructure (DPTI) is responsible for the
management of the arterial road network is South Australia. Companies wishing to supply
and place asphalt, spray seals and slurry/microsurfacing for DPTI, or to roadworks
contractors who are building roads for DPTI, must be prequalified.
Prequalification is available in the following categories:
Category
Type of Work
Typical Value of Work
($,000)
A1
Asphalt – Placement Only
< 250
A1
Asphalt – Supply & Place
< 250
A2
Complex Asphalt – Supply & Place
> 250
S1
Spray Seal Surfacing
< 200
S2
Complex Spray Seal Surfacing
> 200
C1
Thin Shape Correction
< 200
C2
Complex Thin Shape Correction
> 200
In addition to contract value, risk and complexity will be taken into account when DPTI
assigns the prequalification category to the contract.
Prequalification at the higher level will automatically qualify a company to tender for lesser
value works.
Where a company is prequalified for asphalt placement only, the asphalt must be supplied
by company prequalified for asphalt production. The Thin Shape Correction categories are
restricted to slurry / microsurfacing, while thin asphalt is included in Category A2.
Prequalification to categories A1 or A2 does not automatically extend to mobile production
plant. If a company proposes to use mobile plant, it must provide evidence that the
relevant requirements specified in Part 3, Items 12 "Asphalt Production - Plant and
Resources" and 13 "Asphalt Production - Systems" will be achieved by the mobile plant
prior to the commencement of production.
Once prequalified, companies are subject to ongoing review by DPTI to ensure that the
information submitted in their application remains valid and that they have performed
satisfactorily when awarded contracts.
The purpose of the prequalification scheme is to reduce the effort of the Industry and
individual Companies at the time of tender and minimise risks to DPTI. The scheme aims
to facilitate, but not replace, tender assessment for individual projects.
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DPTI– PREQUALIFICATION 1SCHEME FOR BITUMINOUS WORKS
PART 2: APPLICATION
Companies are invited to apply for prequalification by completing and submitting the
following application form.
The information described in Part 3 “Information to be Submitted and Assessment
Criteria” must be attached to the application.
A read only electronic application must be submitted as follows:
If the application is on a CD, it should be marked for the attention of the
Manager Contracting and Procurement and may be either:

posted to GPO Box 1533, ADELAIDE SA 5001; or

delivered to 77 Grenfell Street, ADELAIDE SA 5000.
If the application is attached to an email(s), it should be forwarded to
[email protected]. Note: If submitting via email, please phone
(08) 8343 2029 to confirm receipt. Also, it may be necessary to split the
application into several emails to keep it to an acceptable size.
Enquiries may be directed to the above email address or to:
For asphalt work: Senior Asphalt Engineer, Phone: (08) 8343 2507
For other work: Supervising Surfacings Engineer, Phone: (08) 8343 2221
Department for Planning, Transport, and Infrastructure,
77 Grenfell St, Adelaide, SA, 5000.
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DPTI– PREQUALIFICATION SCHEME
FOR BITUMINOUS WORKS
PART 2 : APPLICATION
Company Name
……………………………………………………………………
Company Numbers:
ABN……………………………ACN…………….………..…
Address of Registered Office
…………………………………………………………………
Postal Address
…………………………………………………………………
CONTACT DETAILS FOR PREQUALIFICATION MATTERS
Contact Person:
…………………………………………………………………
Position in Company
…………………………………………………………………
Telephone
…………………………………………………………………
Mobile
…………………………………………………………………
Email
…………………………………………………………………
CONTACT DETAILS FOR TENDER NOTIFICATION
Contact Person:
…………………………………………………………………
Position in Company
…………………………………………………………………
Telephone
…………………………………………………………………
Mobile
…………………………………………………………………
Email
…………………………………………………………………
Prequalification Class being applied for (please indicate)
Asphalt:
A1
A1 Placement Only
A2
Spray Seal:
S1
S2
Shape Correction:
C1
C2
Details supporting this application for Prequalification are attached.
Signed:
……………………………………..
Date:
………………..……………..
Notes:
Invitations for Tender or Quotations may be either advertised on https://www.tenders.sa.gov.au or
forwarded directly to the email address provided above.
It is the responsibility of the company to ensure that the above details are kept up to date. The
email address for tender notification should be a company mail box, not a personal email address.
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 3: INFORMATION TO BE SUBMITTED AND ASSESSMENT CRITERIA
Please provide the information listed in the column “INFORMATION TO BE SUBMITTED BY APPLICANT” in the following table:
For A1, S1 and / or C1
(1) COMPANY
STRUCTURE
MINIMUM REQUIREMENT
For A2, S2 and / or C2
Outline of company structure and ownership
For information only.
For information only.
Organisational Chart showing key personnel, including Company
Directors, Operations Managers, Project Managers, key professional staff,
& key site supervisory staff.
For information only.
For information only
(2) INSURANCE
Evidence of Insurance Policies and certificates of currency
$10,000,000 Public Liability insurance.
$10,000,000 Public Liability insurance.
(3) COMPANY
PERSONNEL AND
COMPETENCY
CV’s for key staff, clearly setting out levels of experience / qualifications in
(at the minimum the bituminous industry including:
Note: the following requirements only apply to staff nominated to work on DPTI projects:
(4) COMPANY WORK
HISTORY
Senior manager has at least 5 years experience in the
bituminous industry or similar.
Senior manager has at least 7 years experience in the
bituminous industry or similar.
Adequate professional and technical resources available,
commensurate with size of organisation.
Adequate professional and technical resources available,
commensurate with size of organisation.
completion of a course in “Work Zone Traffic Management”;
Key Professional Staff have more than 3 years professional
experience in the bituminous industry.
Key Professional Staff have more than 5 years professional
experience in the bituminous industry.
Any evidence of training ie relevant to the area, including training
plans.
Number of experienced Supervisors appropriate for size of
contracts undertaken by company.
Number of experienced Supervisors appropriate for size of
contracts undertaken by company.
Senior supervisors have at least 3 years experience in the
bituminous industry or similar.
Senior supervisors have at least 5 years experience in the
bituminous industry or similar.
Permanent Staff have appropriate experience for their
positions
Permanent Staff have appropriate experience for their
positions
Evidence of successful completion of relevant bituminous
contracts over the past 3 years.
Evidence of successful completion of bituminous contracts
over the past 3 years as follows:

experience/capability on projects of similar complexity and value
to the category being applied for;

experience in traffic management in accordance with AS 1742.3
for light and heavy traffic conditions;


Details of completed relevant contracts in the last 3 years, including:

Project Name & Description;

Contract type;

Client Name and contact details of a Referee;

Date for Practical Completion;

Detail the conditions of contract used by the company for its
subcontracts, and the extent of their use;

Details of asphalt mixes registered with DPTI (A1 and A2 only);

Details of level of experience with the supply, manufacture and
application of various binder types ie (PMB’s, Crumb Rubber,
Emulsions etc);

Date of Practical Completion and relevant details if the Date for
Practical Completion was not met;

Initial and final Contract Sum..
Evidence of successful completion of bituminous contracts in
medium traffic conditions.

Exceeding $75,000 if already Prequalified to A1, S1
or C1,

Exceeding $400,000 if not Prequalified to A1, S1 or
C1.
(Yes / No)
MINIMUM REQUIREMENT
Meets
Requirement?
INFORMATION TO BE SUBMITTED BY APPLICANT
(Yes / No)
SUBJECT
Meets
Requirement?
These columns for DPTI use only
Evidence of successful completion of bituminous contracts in
heavy traffic conditions (eg arterial roads).
Evidence of successful completion of contracts with liaison
with local business / community.
Satisfactory knowledge / understanding of DPTI specifications
or equivalent
Satisfactory knowledge / understanding of DPTI specifications
or equivalent
If these contracts are not for DPTI or another State Road Authority,
provide evidence of knowledge and understanding of DPTI specifications
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 3: INFORMATION TO BE SUBMITTED AND ASSESSMENT CRITERIA
These columns for DPTI use only
(5) SUBCONTRACTORS
Details of approach to managing subcontractors
Demonstrated ability to manage work as a prime contractor
plus some level of experience in subcontracting.
Demonstrated performance in managing and fair dealing with
sub-contractors.
(6) SCHEDULING
SYSTEMS
Outline of the scheduling systems used by the company for programming
of the works
Appropriate scheduling systems in place and staff with
scheduling expertise.
Appropriate scheduling systems in place and staff with
scheduling expertise.
(7) TRAINING
Outline of the company’s training plan to ensure that personnel have the
appropriate skills and records of training.
Staff have undertaken appropriate training, including AAPA
competency based training for critical processes and White
Card training.
Supervisors and Staff have undertaken appropriate training,
including AAPA competency based training for critical
processes and White Card training..
(8) PARTNERING
The company’s policy on partnering including your understanding of
partnering, and what your company can contribute to a partnering
relationship.
No requirements
Satisfactory understanding and approach to Partnering
(9) QUALITY
MANAGEMENT
Copy of certification of quality management system;.
Certified quality system to recognised a standard (eg CCF IMS
or AS / ISO 9001)
Certified quality system to AS / ISO 9001
(10) ENVIRONMENTAL
MANAGEMENT
Copy of certification of environmental management system (EMS).
Certified EMS to recognised a standard (eg CCF IMS or
AS / ISO 14001)
Certified EMS to AS 14001
(11) WORK HEALTH &
SAFETY (WHS)
Copy of certification of WHS management system.
Certified WHS management system to recognised a standard
(eg CCF IMS or AS / ISO 48001)
Certified WHS management system to AS 48001
Workcover Registration Number, Certificate of Currency for Workers
Compensation and a copy of the annual Workcover renewal notification.
Satisfactory certification
Satisfactory certification
If an Infringement Notice under the WHS Act has been issued in the last 2
years, details of the Notice and evidence that Corrective Action has been
implemented.
A satisfactory response to any an Infringement Notice under
the WHS Act and evidence that Corrective Action has been
implemented
A satisfactory response to any an Infringement Notice under
the WHS Act and evidence that Corrective Action has been
implemented
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 3: INFORMATION TO BE SUBMITTED AND ASSESSMENT CRITERIA
APPLICATIONS FOR A1 AND A2
Plant , Technical Resources and Systems to Meet Part R27 Requirements for Asphalt Production
(not required if prequalification for placement only is being sought)
SUBJECT
(12) ASPHALT
PRODUCTION –
PLANT &
RESOURCES
INFORMATION TO BE SUBMITTED BY APPLICANT
Detailed description of major plant, facilities and other resources to
demonstrate compliance with the requirements specified. (information is
to include age of plant, capacity, dimensions, last calibration etc.).
Details of the testing facility, including evidence of accreditation, for the
test methods required in the DPTI Master Specification.
(13) ASPHALT
PRODUCTION SYSTEMS
Copy of Process Control documentation, including procedures, Inspection
and Test Plans, Corrective Action Requests, audit results and Quality
Records.
MINIMUM REQUIREMENT FOR A1
MINIMUM REQUIREMENT FOR A2
Track record & capacity to successfully manage the
procurement of Aggregate and Bitumen.
Track record & capacity to successfully manage the
procurement of Aggregate and Bitumen
Demonstrated capacity to sample aggregates and bitumen and
provide audit samples to required standards
Demonstrated capacity to sample aggregates and bitumen and
provide audit samples to required standards
Type, size and performance of plant appropriate for size of
contracts undertaken by company.
Type, size and performance of plant appropriate for size of
contracts undertaken by company. Capacity to add RAP into
Asphalt mixes.
Demonstration capacity to sample asphalt and provide audit
samples to required standards.
Demonstration capacity to sample asphalt and provide audit
samples to required standards.
Laboratory Facility:
Laboratory Facility:

accredited with NATA for relevant tests,

accredited with NATA for relevant tests,

Ability to prepare asphalt mix designs for dense
mixes.

Ability to prepare asphalt mix designs for dense and
other specialist mixes.
Appropriate asphalt aggregate and bitumen transport
equipment.
Appropriate asphalt aggregate and bitumen transport
equipment.
Process Control Procedures to include:
Process Control Procedures to include:

Charting of Production Test Results,

Plant Schematic Diagram,

Plant Capability analysis.

Mixing process Schematic,

Selection, documentation and real time charting of
critical elements,

Calibration of plant incoming materials to target
outputs,

Demonstration that plant meets DPTI requirements,

Plant Capability analysis.

Mix Design Procedures

Manufacture of Mixes Procedures
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 3: INFORMATION TO BE SUBMITTED AND ASSESSMENT CRITERIA
APPLICATIONS FOR A1 AND A2
Plant , Technical Resources and Systems to meet Part R28 Requirements for Asphalt Placement
SUBJECT
(14) ASPHALT
PLACEMENT PLANT &
RESOURCES
INFORMATION TO BE SUBMITTED BY APPLICANT
Detailed description of major plant, facilities and other resources to
demonstrate compliance with the requirements specified. (information is
to include age of plant, capacity, dimensions, last calibration etc.).
Details of the testing facility, including evidence of accreditation, for the
test methods required in the DPTI Master Specification.
MINIMUM REQUIREMENT FOR A1
Type, size and performance of pavers and compaction plant
appropriate for size of contracts undertaken by company.
Type, size and performance of pavers and compaction plant
appropriate for size of contracts undertaken by company.
Track record & capacity to successfully managing cold planing
resources.
Type, size and performance of planers appropriate for size of
contracts undertaken by company.
Track record & capacity to successfully manage coring
resources.
Satisfactory coring capacity and accredited laboratory with
NATA for relevant tests.
Appropriate equipment for transportation of asphalt & plant.
Appropriate equipment for transportation of asphalt & plant.
Track record & capacity to successfully manage the
procurement of bitumen and blended bitumen.
Track record & capacity to successfully manage the
procurement of Bitumen, including source and transportation
system.
Capability to blend bitumen including capacity of plant to blend
(ie volume) and quality control systems in place (control on the
blending) for:
(optional) Capability to blend bitumen including capacity of
plant to blend (ie volume) and quality control systems in place
(control on the blending) for:
(15) ASPHALT
PLACEMENT SYSTEMS
Copy of Process Control documentation, including procedures, Inspection
and Test Plans, Corrective Action Requests, audit results and Quality
Records.
MINIMUM REQUIREMENT FOR A2

Polymer modified bitumen

Polymer modified bitumen

Primes and primer binders

Primes and primer binders

Emulsions

Emulsions

Crumb Rubber and

Crumb Rubber and

Multigrade.

Multigrade.
No, type, size and performance of plant appropriate for size of
contracts undertaken by company
No, type, size and performance of plant appropriate for size of
contracts undertaken by company
Track record & capacity to successfully manage bitumen
testing.
Laboratory Facility accredited with NATA for bitumen and
aggregate tests.
Appropriate plant and track record of successfully placing
geofabric during the seal process
Appropriate plant and track record of successfully placing
geofabric during the seal process
Process Control Procedures to include:
Process Control Procedures to include:

Testing Plan Procedures

Testing Plan Procedures

Placement of Mixes Procedures

Placement of Mixes Procedures

Insitu Testing Procedures

Insitu Testing Procedures

Reporting to DPTI

Reporting to DPTI
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 3: INFORMATION TO BE SUBMITTED AND ASSESSMENT CRITERIA
APPLICATIONS FOR S1 AND S2
Plant , Technical Resources and Systems to meet Part R26 Requirements for the Application of Sprayed Bituminous Surfacing
SUBJECT
(16) SPRAY SEAL –
PRODUCTION AND
PLACEMENT
INFORMATION TO BE SUBMITTED BY APPLICANT
Detailed description of major plant, facilities and other resources to
demonstrate compliance with the requirements specified”. (information is
to include age of plant, capacity, dimensions, last calibration etc.).
Details of the testing facility, including evidence of accreditation, for the
test methods required in the DPTI Master Specification.
(17) SPRAY SEAL –
SYSTEMS
Copy of Process Control documentation, including procedures, Inspection
and Test Plans, Corrective Action Requests, audit results and Quality
Records.
MINIMUM REQUIREMENT FOR S1
Track record & capacity to successfully manage the
procurement of bitumen and blended bitumen.
Capability and quality control systems in place to source
binders for:

Polymer modified bitumen

Primes and primer binders

Emulsions

Crumb Rubber and

Multigrade.
MINIMUM REQUIREMENT FOR S2
Track record & capacity to successfully manage the
procurement of Bitumen, including source and transportation
system.
Capability to source and blend binders including capacity of
plant to blend (ie volume) and quality control systems in place
(control on the blending) for:

Polymer modified bitumen

Primes and primer binders

Emulsions

Crumb Rubber and

Multigrade.
No, type, size and performance of plant appropriate for size of
contracts undertaken by company
No, type, size and performance of plant appropriate for size of
contracts undertaken by company
NATA accredited laboratory facility used for bitumen and
aggregate tests.
NATA accredited laboratory facility used for bitumen and
aggregate tests.
Appropriate plant and track record of successfully placing
geofabric during the seal process
Appropriate plant and track record of successfully placing
geofabric during the seal process
Contract/specification review pre-tender.
Contract/specification review pre-tender.
Compliance with AAPA Code of Practice for the Supply and
Delivery of Polymer Modified Binders
Compliance with AAPA Code of Practice for the Supply and
Delivery of Polymer Modified Binders
Purchase, handling and supply of input materials including:
Purchase, handling and supply of input materials including:

Aggregate

Aggregate

Bitumen

Bitumen

Modified binders

Modified binders

Adhesion Agent

Adhesion Agent

Geotextile
Critical aspects of process, including but not limited to:

Geotextile
Critical aspects of process, including but not limited to:

Seal inspection and design

Seal inspection and design

Aggregate loading, precoating & spreading

Aggregate loading, precoating and spreading

Binder Spraying

Binder Spraying

Management of the site

Management of the site

Geotextile application

Geotextile application
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 3: INFORMATION TO BE SUBMITTED AND ASSESSMENT CRITERIA
APPLICATIONS FOR C1 AND C2
Plant , Technical Resources and Systems to meet Part R29 Requirements for the for the Supply and Application of Bituminous Slurry/Micro Surfacing
SUBJECT
(18) SHAPE
CORRECTION –
PRODUCTION AND
PLACEMENT
INFORMATION TO BE SUBMITTED BY APPLICANT
Detailed description of major plant, facilities and other resources to
demonstrate compliance with the requirements specified”. (information is
to include age of plant, capacity, dimensions, last calibration etc.).
Details of the testing facility, including evidence of accreditation, for the
test methods required in the DPTI Master Specification.
MINIMUM REQUIREMENT FOR C1
MINIMUM REQUIREMENT FOR C2
No, type, size and performance of plant appropriate for size of
contracts undertaken by company
No, type, size and performance of plant appropriate for size of
contracts undertaken by company
Evidence of ability to undertake mix design of thin surfacing
treatments to appropriate standards/guidelines
Evidence of ability to undertake mix design of thin surfacing
treatments to appropriate standards/guidelines
Track record & capacity to successfully manage bitumen
testing.
Laboratory Facility accredited with NATA for bitumen and
aggregate tests.
Track record & capacity to successfully manage the
procurement of materials including binders and aggregates.
Track record & capacity to successfully manage the
procurement and distribution of materials including binder and
aggregates
Information on any blending capacity to produce binders
including history of past results
(19) SHAPE
CORRECTION –
SYSTEMS
Copy of Process Control documentation, including procedures, Inspection
and Test Plans, Corrective Action Requests, audit results and Quality
Records.
Procedures that cover the following:
Procedures that cover the following:
Mix design
Mix design
Purchase and supply of input materials including:
Purchase and supply of input materials including:

Aggregate

Aggregate

Bitumen

Bitumen

Modified binders

Modified binders

Additives

Additives
Manufacture including processes to ensure compliance with
mix design.
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Manufacture including processes to ensure compliance with
mix design
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 4: CONDITIONS OF PREQUALIFICATION
1.
Introduction
These Conditions of Prequalification prescribe the rules by which an application will be
assessed by DPTI and if applicant is successful, for the management of the prequalification
system. By submitting a application for prequalification, an applicant agrees to comply with,
and be bound by, the rules contained within these Conditions of Prequalification.
2.
Applications
Companies may submit applications for prequalification at any time. Applications must be
submitted in accordance with Part 2 “Application” of this document . Prequalification only
determines a company’s eligibility to submit tenders.
3.
Assessment and Notification
Applications for prequalification will be assessed in accordance with DPTI’s internal
procedures for management of its prequalification systems. DPTI and its agents may
undertake any investigation that is reasonably necessary to validate the information submitted
by the applicant.
The criteria considered in the assessment of an application are those listed in Part 3:
“Information to be Submitted and Assessment Criteria” of this document.
Companies should allow at least eight weeks from the date of submission for the assessment
process.
The prequalification of a Contractor does not extend to related or subsidiary companies
owned or controlled by the Contractor.
4.
Prequalification Period
The prequalification system is reviewed at least every three years. However, DPTI, in its
absolute discretion, may at any time:
5.

vary the period of review and/or revise the system;

advertise for new applications; and

request a company to validate or resubmit their application (either in part or in its
entirety).
Reviewing, Rescinding or Downgrading Prequalification
At any time, DPTI may review the prequalification status of a company and in its absolute
discretion, rescind the company’s prequalification or reduce the level of prequalification as a
result of:

in DPTI’s opinion, unsatisfactory performance by the company on a contract for any
client;

material changes to a company’s organisational structure, third party certification or
its technical, financial or management capacity; or

a failure to comply with the terms and conditions of prequalification.
Before such action is taken, the Contractor will be given an opportunity to show cause why
the prequalification should not be rescinded or reduced. The Contractor will also be given
details of the matters prompting the request to show cause.
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DPTI– PREQUALIFICATION SCHEME FOR BITUMINOUS WORKS
PART 4: CONDITIONS OF PREQUALIFICATION
6.
Provisional Prequalification
A company may be granted Provisional Prequalification where it does not fully comply with
every requirement specified in this document, but DPTI forms the reasonable opinion that the
company will be able to do so in the near future. (e.g. a new company has been formed which
is staffed by experienced managers and supervisors). This enables the company to submit
tenders to DPTI for the period nominated by DPTI.
Full prequalification is then subject to the company demonstrating that they are able to
comply with the specified requirements for full prequalification. If a provisionally prequalified
company is unable to demonstrate compliance within the nominated period, DPTI may
request resubmission of all or part of their application or withdraw the provisional
prequalification.
7.
Contractor to Advise
A prequalified company must immediately advise the Director, Contracting and Procurement,
DPTI of any material change to:
 its financial capacity, contact details, ownership, resources or technical capacity; and /or
 any convictions or prohibition notices under Work Health and Safety legislation or
environmental legislation.
8.
Confidentiality
Except as required by law, DPTI will ensure the confidentiality of all information supplied by
companies is maintained and will sign an appropriate confidentiality agreement if requested.
9.
Publication of Prequalification Status
A list of the prequalified companies will be disclosed to others on the following web site:
http://www.dpti.sa.gov.au/documents/contractsandtenders/prequalification.
While a company may communicate its DPTI prequalification status to others, it must not
represent that this prequalification necessarily means that they are competent to undertake
work for organisations other than DPTI. No responsibility is accepted for any consequences
arising from the use of the prequalification scheme other than for DPTI contracts.
10.
Disclaimer
The decision to approve or reject, with or without conditions, any application for
prequalification is at the absolute discretion of DPTI. DPTI is not liable for any costs or
damage incurred in the exercise of such discretion or the discretion to rescind or downgrade
any prequalification.
While other organisations may reference this prequalification system, DPTI:
 assumes no responsibility whatsoever to any other party in any matter associated with
this prequalification system;
 has developed this system solely for its internal purposes; and
 does not represent or warrant that any of the prequalified companies are technically
capable, financially sound or suitable for any non-DPTI project.
Any organisation seeking to deal with prequalified companies must rely on its own enquiries
and bears all risks associated with the use of this prequalification system.
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