Keystone Mechanical is Grande Prairie's one stop shop for all your certification needs! All of our Heavy Duty Technicians are fully licensed and hold over a decade in experience, knowledgeable in current diagnostics software and solutions. Our Tank Inspections are done in accordance with the latest releases and updates of the B620 standard. All tank data and reports are held on a electronic system to allow better tracking of units history and due dates so we can keep you better prepared for the up coming audits and inspections! Whether it's heavy duty repair, hose testing or commercial vehicle inspections, call or visit our website today for more information! more... See more text