The Indiana Department of Environmental Management could fine BP up to $25,000 for each violation.
BP discovered in a test Tuesday that the total suspended solids discharged rose to more than 26,600 pounds.
A class-action settlement against BP went to a federal court judge today, after the petroleum company sold tainted gas in the summer of 2012.
Six stations in Bloomington, two in Bedford, two in Columbus, and one in Edinburgh are among those included in the recall.
Foreign investments in Indiana declined during the recession but are again on the rise.
A settlement has been signed that will cut emissions from the highly-polluting tar sands oil project in Northwest Indiana.