There was 100 to 150 gallons of diesel #2 released in Ogden. A truck on site was fueling up and left the truck unattended for a brief moment. At which point the fuel spilled on to ground and ran into a small retention pond where the fuel was retained. Enviro Care responded with a vacuum truck and other emergency vehicles. The crew applied absorbent to clean the ground and vacuumed the liquid form the pond.