BASF SE, the world’s biggest chemical maker, is in talks with Royal Dutch Shell Plc (RDSA) to determine who should pay a 490 million-euro ($653 million) fine for contamination in Brazil. The site in Paulinia was “significantly” contaminated by the production of crop protection products, and BASF and Shell were jointly ordered in August 2010 to pay damages to former employees for medical treatment and personal suffering, BASF said in its 2011 annual report. BASF said its Brazilian unit filed a lawsuit against Shell on March 30, asking a court to declare that Shell is responsible for the full amount of the damages resulting from the contamination at Paulinia. The two companies are in settlement talks, Ludwigshafen, Germany-based BASF said.