A new analysis by the Environmental Working Group (EWG) suggests that many Americans are at risk of exposure to a dangerous chemical that has been found in baby bottles, the lining of food and beverage containers, and now paper receipts. Significant levels of bisphenol-A (BPA), a controversial chemical that is not currently regulated by the Food and Drug Administration or the Environmental Protection Agency, was found in 40 percent of paper receipts collected from major retailers, grocery stores, convenience stores, gas stations, fast-food restaurants, post offices and ATMs.