In accordance with the terms of the lease agreement, the Company is required to dismantle its oil extraction plant at the end of the lease term, which is expected to be in 25 years. During the year ended August 31, 2015, the Company recorded a provision of $350,000 for dismantling the facility.

Because of the long-term nature of the liability, the greatest uncertainties in estimating this provision are the costs that will be incurred and the timing of the dismantling of the oil extraction facility. In particular, the Company has assumed that the oil extraction facility will be dismantled using technology and equipment currently available and that the plant will continue to be economically viable until the end of the lease term.

The discount rate used in the calculation of the provision as at May 31, 2019 and August 31, 2018 is 2.0%.

In accordance with environmental laws in the United States, the Company’s environmental permits and the lease agreements, the Company is required to restore contaminated and disturbed land to its original condition before the end of the lease term, which is expected to be in 25 years. During the year ended August 31, 2015, the Company provided $200,000 for this purpose.

The site restoration provision represents rehabilitation and restoration costs related to oil extraction sites. This provision has been created based on the Company’s internal estimates. Significant assumptions in estimating the provision include the technology and equipment currently available, future environmental laws and restoration requirements, and future market prices for the necessary restoration works required.

The discount rate used in the calculation of the provision as at May 31, 2019 and August 31, 2018 is 2.0%.