Station 32 on scene advised fully involved storage building/shed. Quint 32/Tender 32 were fire attack, E37 pumped to Quint 32, and assisted with fire attack, Tender 37 set up a dump tank. E33 assisted with fire attack. BAT32 was command, SQ13 was safety until BAT34 arrived. Valley Center Tender 411 and Tender 33 also assisted with the water shuttle. County Investigator also responded to the alarm.