PepsiCo officials say their Tropicana orange juice does contain the potentially dangerous fungicide carbendazim.  The company announced Saturday their juice tested positive for low levels of the chemical.  They added the levels were below federal safety levels and do not pose any health risks. Meanwhile, the FDA is allowing orange juice from Canada back into the U.S.  The agency says final testing showed three samples of the juice did not contain the fungicide.  It's the first time imported orange juice is being allowed into the country since January 4th.  The FDA is expected this week to release complete test results on orange juice imported from Mexico and Brazil.