A spark from a sander ignites some sawdust, sending 15 employees out of a commercial building on Boyd Acres Road around 8:15 this morning. Bend Fire and Rescue reports that when they arrived, heavy fire was coming from the rear of the Chester Cabinets building. Owner Robin Chester says he heard an explosion; employees noticed the fire and called 911. The fire originated in the dust collection system. The building fire sprinklers activated and prevented the fire from spreading too much. .Fire crews were able to knock down the fire quickly. The loss is estimated at $30,000.