Glendale firefighters responded to a hazmat call at a Circle K gas station near 75th Avenue and Glendale early Tuesday morning.
Crews said a man pumping fuel saw some flames spark up from across the parking lot and a worker also heard some type of explosion.
Hazmat crews were called to the scene and with meters, they checked the readings on some flammable caps. They say it was a mechanical pump that moves the fuel had a shortage in a pump and fumes collected. Some sparks may have ignited. Firefighters say this is a one-time event; there was no leaking or vapor reading -- everything is intact.