baritaria bay, louisiana. the marshs and shores of these islands were once covered in oil. today from our boat, we spot two dozen workers wearing face masks, shoveling and working on a stretch of beach. we pulled off to take a look. >> how are you doing? doing good. drew griffin with cnn. >> nice to meet you. this is philippe cousteau. >> we'll have you stay away from the hazardous material, this is a clean-up site. >> the hazardous material turned out to be bp's oil, a 90-foot long, 30,000 pound tarmac. we had a small tar ball tested and it matched the oil from the spill. >> the fact is, five years later, there is still oil, oil in big enough clumps that it needs to be dug up by a crew like this, digging down 30 inches trying to take it and remove it. >> the pockets of tarmac that