>> how are you? >> drew griffin with cnn. nice to meet you. this is fell leap cousteau. >> stay away from the hazardous material. it is a cleanup site. >> the hazardous material turned out to be bp's oil, 90-foot long, 30,000 tarmac. we had a small tar ball tested and it matched the oil from the spill. >> the fact is, five year 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 tar mats that still exist are in areas that are known to us, but which were deemed by the federal government to be better to leave alone there and let them be naturally exposed to -- through erosion and then for us to clean them. as they appear, we are finding them and removing them. but none of them poses a threat