Calgary, Alberta, June 5, 2000

Lafarge Canada Inc. (TSE:LAF), the leading supplier of construction materials in Canada, Mullen Transportation Inc. (TSE:MTL), Lafarge's primary cement carrier in Alberta, and CGI (TSE: GIB.A, NYSE: GIB), one of Canada's leading e-business services providers announced today a new business-to-business (B2B) initiative designed to streamline the supply chain process. The primary focus of the initiative will include the development of a seamless real-time information database, which will be accessible by both Lafarge and Mullen.

"Lafarge is committed to using the latest Internet based technologies to ensure that our customers receive the most timely and responsive delivery solutions in the cement market today", said Jim Bergeron, Vice President of Distribution for Lafarge. "Furthermore, by working closely with Mullen we believe that these initiatives will ultimately serve as a prototype for Lafarge to utilize in other regions and product lines in our organization".

"The efficiencies that can be realized through the collaborative sharing of information are significant", added Murray Mullen, President and Chief Executive Officer of Mullen Transportation. "In this new economy, suppliers must be prepared to help their customers become more efficient. In the first stage of this project we believe we can help Lafarge improve the supply chain process through the elimination of unnecessary work processes, and simultaneously improve customer service. Both companies will win from this initiative."

CGI has been engaged by Lafarge to develop the web-based system, which will allow product delivery requirements and current status to be electronically conveyed between Lafarge and Mullen. Data from varied internal and external applications will be consolidated, allowing easier access to shipment status information. The cement delivery process will be streamlined by providing increased opportunities to pair up Mullen satellite equipped trucks with Lafarge cement orders in Alberta. The system will include customer service oriented performance metrics to help both Lafarge and Mullen improve the levels of service offered to customers.

Lafarge Corporation (NYSE, TE: LAF) is one of North America's largest diversified suppliers of cement, aggregates and concrete, gypsum wallboard, and other materials for residential, commercial, institutional, and public works construction. Lafarge operates 15 cement plants, approximately 600 construction materials operations, three gypsum wallboard manufacturing facilities, and other businesses in 44 states and all provinces of Canada, with 1999 sales of more than $2.6 billion. The company's majority shareholder is Lafarge (Paris Stock Exchange: LAFP). The Lafarge Group is a world leader in building materials with operations in 70 countries and sales in excess of USD$11 billion. Learn more about Lafarge by visiting

Mullen Transportation Inc. is a logistics facilitator - streamlining business solutions and meeting the challenges of its customers by using the latest satellite database and Internet based technologies. The Mullen Transportation Group is recognized as the largest provider of specialized transportation and related services to the oil and gas industry in western Canada, and as one of the leading suppliers of trucking and logistic services in Canada, operating a fleet in excess of 1,000 trucks and 2,500 trailers.

CGI is the fifth largest independent information technology (IT) services company in North America based on its CDN $1.5 billion (US$1 billion) revenue run-rate. It is the largest Canadian independent end-to-end IT services company. CGI shares are listed on the Toronto stock exchange (GIB.A) and on the New York Stock Exchange (GIB).

For more information, please contact:

Lafarge Canada Inc.
Jim Bergeron
Vice-President, Distribution
(403) 225-5413 

Mullen Transportation Inc.
Murray K. Mullen
President and Chief Executive Officer
(403) 652-8888 

Ronald White
Director, Investor and Media Relations
(514) 841-3200