OLD RIVER, CA- At 4:26 pm, the Kern County Fire Department responded to a report of natural gas leak at Delta Trading, located in the 17700 block of Millux Rd, south of Bakersfield.   Upon arrival, crews made contact with site personnel, and were able to determine that the leak was coming from a tank trailer on the east end of the facility, and was holding approximately 90 barrels worth of product. Firefighters from Engine 52 and Haz Mat 66 made entry to the affected area to determine exactly where the leak was originating, and through radio communication with facility staff, were able to begin shutting down specific valves and isolate the leak. Firefighters and Kern County Environmental Health personnel are still on scene, and will remain until the situation is mitigated.