Exxon Valdez oil spill a number of recommendations, such as changes to the work patterns of Exxon crew in order to address the causes of the accident. In response to the spill, the United States Congress passed the Oil Pollution Act of 1990 (OPA). The legislation included a clause that prohibits any vessel that, after March 22, 1989, has caused an oil spill of more than in any marine area, from operating in Prince William Sound. In April 1998, the company argued in a legal action against the Federal government that the ship should be allowed back into Alaskan waters. Exxon claimed OPA was
Greenpoint oil spill study, completed in May 2007, indicated that no vapor was coming from the spill into homes. The Environmental Protection Agency's (EPA) "Newtown Creek/Greenpoint Oil Spill Study Brooklyn, New York" states that vapor concentrations in "some commercial establishments" were found "above the Upper Explosive Limit". The study also said, "A review of the data collected by the NYSDEC shows that, in general, chemicals were detected at all locations in each home, but not in a pattern that would typically represent a vapor intrusion phenomenon." A New York State Department of Environmental Conservation report tested residential blocks above the spill area concluded