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Following an investigation which produced a list of projects acquired via black-market currency dealer Alberto Youssef, a total of 750 contracts could be scrutinized for irregularities, local paper O Estado de S. Paulo reported.
The investigation has widened since the scandal broke this year to involve other sectors including transport and infrastructure.
Contracts for projects at Viracopos international airport in São Paulo state's Campinas city, the paper said, are expected to go under the microscope as are contracts for 2008 work at Galeão international airport in the city of Rio de Janeiro and for 2011 work at Confins international airport near Minas Gerais state capital Belo Horizonte.
Work carried out in 2012 at Amazonas state's Manaus airport and at the Bahia state Feira de Santana airport concession was also mentioned in the report.
Money received by Youssef for Galeão, Confins and Manaus alone could have totaled 4.4mn reais (US$1.68mn), O Estado de S. Paulo said.