According to the FRA, chemical composition of the oil is not being properly identified on shipping manifests, despite the use of corrosive or volatile chemicals in the fracking process. Content of blended crude from multiple wells is not tested before loading, even though FRA indicates that “it is critical that shippers determine the proper classification of the crude oil” as a tanker with a higher safety classification (and not the standard DOT-111A car) is required for corrosive or explosive materials. The information is needed for provision to first responders and emergency services during a disaster. In an increasing number of incidents, chemicals such as hydrochloric acid (used to release crude from oil well rock formations) have corroded tanks, covers, valves and fittings. As unit trains of tanker cars do not pass over weigh-in-motion scales in classification yards, many are overloaded, increasing risks of leakage as oil expands with temperature. The result has been twice the number of leaks from crude oil shipments as from alcohol shipments, the next highest hazardous material, even though comparable volumes of each travel by rail. In January 2014, Canada's Transportation Safety Board recommended that DOT-111 / CTC-111A oil-by-rail cars built before October 2011 be replaced with the newer, reinforced design. It also recommended carriers perform route planning and analysis and advocated mandated emergency response plans. While TSB set no clear deadlines, Irving Oil plans to replace the remainder of its own fleet of DOT-111's by the end of April 2014 and ask its suppliers to modernise by the year's end. In February 2014, the US Federal Railroad Administration placed crude oil under the most protective two sets of hazardous materials shipping requirements and issued an order requiring tests of crude oil before shipment by rail. In April 2014, the Canadian government required a phaseout or retrofit of the older DOT-111 oil-by-rail cars on a three-year deadline and mandated emergency response plans for all oil shipments by rail. A new group of four commercial buildings was built to accommodate some displaced businesses on a new site near the sports centre. In August 2013, consultants began surveying the site of a new bridge across the Chaudière River from Papineau Street to Lévis Street, to serve the new commercial district. New rail track reconnected the local industrial park to the Montreal line in November 2013. Private residences were expropriated to make way for redevelopment in Fatima. Students at Laval University, Université de Montréal, and Université de Sherbrooke collected tens of thousands of books for a new library.