Big Y supermarkets have voluntarily recalled two types of ground sirloin processed in the same plant as beef contaminated with E. coli.

None of the meat at Big Y has tested positive, but the supermarket is taking precautions and asking customers to return ground sirloin bought between July 18 and Aug. 1 for a full refund.

The recalled sirloin came from the Kansas-based National Beef Packing Company, which recalled over 50,000 pounds of ground beef yesterday after a sample tested positive for E. coli.

The recalled meats at Big Y include those labeled “fresh ground sirloin 87 percent lean” and “sirloin steak patties 87 percent lean.”

According to a statement from Big Y, the recall does not affect any other ground beef sold in its supermarkets.