Okay, let’s break this down. Shawn has 33 years of experience in environmental consulting, which is a significant amount of time. His expertise in groundwater and hydrogeology is also in high demand. As a Principal at Golder Associates, he has likely worked with various clients and projects, which can impact his earning potential. Considering his experience and skills, I would estimate his hourly rate to be around $125, which is slightly lower than the average rate for environmental consultants with similar experience. However, this is still a reasonable estimate given his location in Mississauga, Ontario, and his level of expertise.