Wheat - Chapter 4 | Official Grain Grading Guide
Export shipments can be commercially clean or not commercially clean.
Shipments are defined as commercially clean when meeting the commercially clean specifications listed in the commercially clean determinant table upon following the Determination of commercially clean procedures described in this chapter.
Dockage is not reported for commercially clean shipments.
For shipments of eastern wheat classes, commercially cleanliness specifications listed in the CWRS commercially clean table is to be used.
Not commercially clean (NCC)
If any of the components exceed the allowable limits as defined in the tables, the shipment becomes not commercially clean, and dockage is assessed using procedures for primary samples.
Shipments, which do not meet the standards for commercial cleanliness, are referred to as not commercially clean. Such shipments are permitted only with the permission of the Canadian Grain Commission.
For samples representing not commercially clean shipments approved by the Canadian Grain Commission for shipment from terminal elevators, dockage is reported to the nearest
- 0.1% for samples representing shipments loaded from a single terminal elevator
- 0.01% for composite samples representing shipments loaded from more than one terminal elevator
less a deduction of up to 0.2% to take into account the buildup of attritional material for direct shipments only.
Cleaning for grade improvement
If the grade of a sample can be improved by additional cleaning, perform the cleaning and add the additional material to dockage. Cleaning for grade improvement can be done at any time after the cleaning assessment has been completed.
The purpose of this cleaning is not to remove all foreign material, but rather to reduce the admixture of conspicuous separable material to within the grade tolerance.
Refer to Cleaning for grade improvement in the Determination of dockage section for full instructions.
A deduction of up to 0.2% is applied to take into account the buildup of attritional material for direct shipments only
Wheat on export is graded using standard samples and export specifications.
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