Dole Fresh Vegetables president Eric Schwartz has confirmed that the romaine and green leaf lettuce in its Hearts Delight salad mix was produced locally in the Salinas Valley and mixed with butter lettuce from Ohio and romaine from growers in Colorado.

The lettuces were processed at Dole’s plant in Springfield, Ohio, on Sept. 6, said Schwartz. Eighty-eight cases — or 528 bags — were distributed in Canada and 755 cases containing 4,530 bags in the U.S.

The U.S. Food and Drug Administration and Dole Food Co, the parent company of Dole Fresh Vegetables, issued a voluntary recall Monday, one day after the Canadian Food Inspection Agency issued its own advisory in Canada.

Dole did confirm that the lettuce products had been shipped to several provinces in Canada as well as to Illinois, Indiana, Maine, Michigan, Mississippi, New York, Ohio, Pennsylvania and Tennessee.