Quality Assurance Program - Oregon Department Of Transportation Page 4
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28ODOT Quality Assurance Program
Quality Control (QC)
Quality Control is defined as: All contractor/vendor operational techniques and activities that
are performed or conducted to fulfill the contract requirements.
The contractor is responsible for providing quality control sampling and testing, furnishing
material of the quality specified, and furnishing QL levels during aggregate production, when
required. The contractor’s Quality Control technician must perform or observe the sampling
operations. Testing operations will be performed by a Certified Technician unless the Training
Program option is utilized (see Appendix H (Training Program) for details). The certified
technician, who performs the sampling and testing procedures, must sign the testing
documentation.
Contractor quality control tests will be used for acceptance only if verified by tests performed by
an independent group (Region QA).
Small quantities of some materials may be accepted when requested by the contractor and
approved by the Project Manager (see Section 4(B) of MFTP).
NOTE: ODOT will perform testing for all source/compliance tests and those non-field tested
items associated with construction products (e.g. asphalt’s, emulsions, tack, water, cement,
lime, etc.).
Verification
Verification is defined as: Sampling and testing performed to validate the quality of the product.
Verification samples are taken randomly (minimum ten-percent of specified quality control
frequency) and tested by an independent group (Region QA) to verify that products meet
required specification(s). Quality Control samples shall not be used for verification.
Independent Assurance
Independent Assurance is defined as: Activities that are an unbiased and independent evaluation
of all the sampling and testing procedures used in the acceptance program.
ODOT’s Independent Assurance (IA) Program uses a combination approach requiring laboratory
certification, technician certification, proficiency samples, and where possible, split samples of
verification or QC tests. The Construction Section certifies quality control and quality assurance
testing laboratories and technicians. Contractor’s test results of split IA samples are compared to
Region QA test results for compliance using ODOT IA parameters. The PM performs random
inspections of QC labs and technicians for compliance. The quality of Region QA test results
are constantly monitored through the Departments proficiency samples program, which is
outlined in Appendix B.
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