In Ontario:

Power Take-Off Refund Allowance
The Fuel Tax Act and the Gasoline Tax Act provide for a refund of the tax paid on clear diesel, gasoline and propane (all referred to as "fuel") used in Ontario to operate auxiliary equipment of a licensed motor vehicle through a power take-off (PTO) operation. PTO refers to auxiliary equipment that is dependent on fuel from the motor vehicle's operating tank for power. Examples of PTO equipment include cement trucks, aerial buckets, reefer units and vacuum trucks.[...]

New Power Take-off Tax Refund AllowancE - Ready Mixed Concrete Trucks
Tax Bulletin FT 1-2003, September 2003
This bulletin announces an increase in the power take-off fuel tax refund allowance to 30 per cent of clear fuel consumed by ready mixed concrete trucks. The new allowance is effective October 1, 2003.
The information in this bulletin does not replace the law found in the Fuel Tax Act and related Regulations.[...]

In Quebec:

Application for a Tax Refund respecting Fuel Used for Stationary Purposes
This application is to be completed to claim a refund of the fuel tax paid on gasoline or non-coloured fuel oil used in Québec to supply the propulsion engine of a motor vehicle. However, the refund applies only to the portion of such fuel required to activate a vehicle's auxiliary equipment by means of a power take-off.[...]

Other provinces offer tax rebate for companies, cities and Municipalities. We will post them as soon as we have the information.