MONTREAL Old bicycles, sewer cover, loads of beer cans and a porcelain pig pepper shaker were among the items pulled from the St. Lawrence River on Saturday during an annual clean-up operation. This year, the group of environmentalists focused on a portion of the river in Kahnawake. Divers scoured the bottom of the waterway, locating a wide array of junk. “I do believe that we need a little bit more awareness regarding the use of our river,” said environmentalist Nathalie Lasselin, an underwater explorder and filmmaker who led the diving team. “The St. Lawrence is the source of drinking and tap water for 80 per cent of the population of Montreal and for 50 per cent of the population of Quebec,” said Lasselin. “We just take it for granted.”