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Federal police reported in emails between employees of Vale and the German consulting firm Tüv Süd that the mining company was already aware of sensor problems at the Córrego do Feijão dam in Brumadinho (MG) two days earlier. before the break. who killed 150 people and left 182 missing.
The information is contained in the testimony of Tuv Süd's project coordinator, Makoto Namba, to PF, in which he claims to have been pressured by Vale to have It makes a report guaranteeing the stability of the dam
Five piezometers, devices that measure the water level and the pressure exerted on the structure of the dam did not work and other measuring devices presented differences.
Namba and another engineer, André Ybaduda, were arrested on November 29, four days after the overflow of the dam that dumped the sea of mud in Brumadinho. On Tuesday (5), the Superior Court of Justice ordered the release of the two engineers.
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Delegate Luiz Augusto Nogueira read e-mails addressed to the engineer during his testimony. According to the PF, the messages were initiated by the individual Denis Valentim on 23 January 2019 at 14:38 and addressed to Vale's executives at Tüv Süd. On January 24 at 2:44 pm, employees of subcontractor Tec Wise also received messages.
"The subject (s) dealt with refers to divergent data obtained by reading the automated instruments (piezometers) on January 10, 2019, installed on the B1 dam of the CCF, as well as on the non -operating 5 automated piezometers. "
The PF asked the engineer" what would be his case if his son worked on the B1 dam site ". "He replied that after confirming the readings, he would immediately call his son to evacuate the place as well as the Vale emergency department charged with triggering the PAEBM (Action Plan). emergency for dams) to take appropriate measures. " said Makoto Namba.
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The engineer told PF that he had been working for Tüv Süd for 24 years. According to him, "Tüc Süd's first external audit of the Córrego Feijão dam took place in September 2018 and consisted in evaluating the conditions of the structure of the dam if its safety devices and the data relating to the same previous inspections and the revision.
"The external audit or a regular inspection carried out in September 2018 and the corresponding reports were used as a basis for the declaration of stability signed by the declarant in September 2018 concerning the CC1 B1 dam"
Pressures of the company
According to testimony, the engineer would have heard a phrase "from a Vale official, Alexander Campanha", at a meeting: "Tüv Süd will sign the declaration of stability?" Namba stated that he had replied: "Tüv Süd will sign if Vale adopts the recommendations indicated in the periodic review of June 2018."
"Although he gave this answer to Alexandre Campanha, the declarant felt that the sentence he said was a way of putting pressure on the declarant and Tüv Süd to sign the declaration of condition of stability at the risk of losing the contract, "he said.
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The engineer also told the PF that "there is a source upstream of the CCF dam B1 reservoir and the excess water from this source is flowing into the dam." "The declarant can not say with certainty, but he can say that since the end of July 2018, a barrier has been constructed and channeled to the source to divert water from the reservoir," he said. declared.
"In September 2018, in the presentation In the regular inspection report, the reporter asked Vale to build a PDU so that the excess exceeding the barrier and piping placed at the source are barred at this location and pumped to the extravasor. "
The engineer told PF even though DAM BREAK from the B1 dam showed that the refectory and the administrative headquarters were on the mud pbadage that was Poured after the breakup, Vale would have had to transfer the administrative headquarters and refectory as well as other buildings to the distance.
On the other side
Vale baderted, through the press office, that he was collaborating in the investigations and that he would not comment on the "peculiarities" [19659002] "As a major interested in clarifying the causes of this disruption, Vale voluntarily submitted documents and emails, on the second working day after the event, to the federal prosecutors and federal police delegate. The company will refrain from commenting on the peculiarities of the investigations in order to preserve the facts on which the authorities have focused. "
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