Engineer may indicate that the tested material does not comply with the Specifications, but the Engineer’s results may verify those of the Contractor.
If the verification test results DO verify the Contractor’s acceptance tests results, the Engineer will complete a verification form and file the test reports as described in Subsection 106.01 above.
If the verification tests DO NOT verify the Contractor’s test results, the Contractor should be instructed to review and or make changes to their equipment and/or procedures so that the results may be verified. The Engineer will note any changes made by the Contractor in a memo to the job file.
In the event that the next subsequent verification test for the same material fails to verify, the Engineer shall proceed to dispute resolution as provided for in Subsection 106.06 of this Manual.
106.05 (a) Technician Certification. All acceptance testing must be performed by a technician certified under the Mack-Blackwell Technician Certification Program at U of A Fayetteville – Center for Training Transportation Professionals (CTTP). This includes testing performed by both Contractor and Department personnel. Graduates of
certification program are issued a registration card technician is certified and the expiration dates
that indicates the areas of the certifications.
in which Resident
Engineers should ensure that have the opportunity to attend
Department personnel involved in sampling and testing the CTTP classes. Please contact the Research Section of
Planning and Research Division to schedule personnel for these classes. See 115.07(d) of this Manual for additional information on the Mack-Blackwell
Certification Program. (b) Laboratory Qualification.
All Contractor acceptance testing must be
performed by a laboratory qualified by the CTTP. Testing performed by a qualified laboratory is only acceptable if it is done in the area of materials testing that the laboratory is qualified and for the specific AHTD/AASHTO tests that the laboratory has requested qualification. Laboratories that have been certified, or that have requested qualification, and the test methods that each lab is qualified for are available on the CTTP website at www.cttp.org.
NOTE:While a certified technician must utilize testing equipment from a CTTP qualified laboratory. It is not necessary for the technician to be formally employed by that lab.
Resolution. Subsection 106.11 of the Standard Specifications provides procedures for evaluating the contractor’s acceptance test results. Should the cause of a failure to correlate remain undetermined after following the outlined procedures, the material may
provided in Subsection 106.12 of the Specifications. Subsection 106.12 procedures for resolving cases where either the Contractor or the Resident
disputes the others acceptance test results.
This procedure should be followed when such
A copy of the dispute notification letter, either sent by or received
by the Engineer, should be forwarded to the Construction Office.