Please see ORBA comments and…

Please see ORBA comments and questions in regards to Consultation Review on: Amendment to SP103S08, January 2020 always with OPSS 308.

1. The options stipulated in 308.08.03.05.01 should be determined by the contractor. This should be clarified explicitly the in the spec to avoid confusion.

2. MTO still using “visual” assessment in section 308.08.03.05.02. During consultation we suggested a manual to be followed to ensure the requirements can be implemented fairly and consistently, but there is no mention of this in the release.

3. MTO still has vehicle tracking in section 308.08.03.05.02. What is the basis for acceptance and rejection? This should also be included in the aforementioned field guide.

4. TABLE 2 Application Rate Requirements for Tack Coat Materials:
 Residual and undiluted application rates don’t correspond in Table 2 – why?
 There is a comment in the notes “*May not be achievable by the equipment” which refers to the application rates for undiluted tack coat. This seems to be a very confusing comment! Why was this added?

5. Clause (a) in section 308.07.02.03 Pavement Core Samples for Interlayer Shear Strength Testing:
a) The pavement cores shall be approximately 150 mm in diameter (145 to 150 mm) with all surfaces of the perimeter perpendicular to the surface of the core within 6 mm;

An explanation of what “perpendicular to the surface within 6 mm” means, may be worthwhile.
Most cores are not absolutely perpendicular to the surface due to the cross slope of the pavement.