text: Groendyke Transport - Tanker on CPCH Bridge, Groendyke Transport led the 40 to 90-million mileage category within the Harvison Division with an accident frequency of 0.462 accidents per million miles., National Tank Truck Carriers (NTTC) has named two companies as North American Safety Champions. They are Groendyke Transport Inc. of Enid, Okla., and Tandet Logistics Inc. of Oakville, Ontario.