At 15:00hrs units were dispatched to the reported hazardous materials incident with spill in the 10400 block of Mula Rd. Upon arrival business occupants reported a muriatic acid spill inside the large tilt wall warehouse which was eating the concrete and producing a gas cloud. Making entry for recon Truck 22 personnel discovered an approximate 10′ X 10′ spill producing a gas cloud between high racks. Upon arrival of FBC Haz Mat entry was made to ensure no migration of the spill, and through multiple subsequent entries, neutralized the acid for cleanup by a private cleanup company. Following completion of decon all units returned to service.