Giant Eagle has removed a specific brand of red and green leaf lettuce from its stores’ produce departments and advised any customers making recent purchases to dispose of the lettuce, due to concerns about potential E. coli contamination.

There have been no local reports of illness, but it “is conducting this voluntary recall out of an abundance of caution.”

The affected products are from a California supplier, Adam Bros. Farming Inc., and are identified on labels as PLU 4076 for green lettuce and PLU 4075 for red. The products were removed from store shelves as of Friday morning, according to a Giant Eagle spokesman.

The company said sediment from a reservoir near where the produce was grown had tested positive for E. coli, and water from the reservoir may have come in contact with the produce. It also said it knew of no illnesses connected to the products.

Giant Eagle said in a news release that customers with either of the lettuce products identified should either dispose of it or return it to the supermarket, and they should bring any grocery receipts to assist with a refund. Customers with questions may call Giant Eagle’s customer service department from 9 a.m. to 9 p.m. weekdays at 800-553-2324.