Fresh Express Incorporated is voluntarily recalling a limited quantity of 9 oz. Leafy Green Romaine Salad with the expired Use-by Date of September 16 as a precaution in an unlikely event that consumers may still have the expired salad in their refrigerators. The recall was necessitated by a positive test result for Listeria monocytogenes on a single package out of many samples collected for the U. S. Department of Agriculture random sample testing program.