From staff and wire reports  had high levels of a chemical that indicate possible doping in his system during this year's race, according to  The newspaper and the wire service each attributes a person with knowledge of the test results on the three-time Tour champion.  A test that the Times said was used for the first time at this year's Tour detected a specific type of chemical, called a plasticizer, that is found in plastic IV bags. Evidence of that chemical in an athlete's urine could mean the athlete has used a blood transfusion to boost endurance.  Contador's spokesman, Jacinto Vidarte, on Tuesday denied any plastic residues were found in the tests. "We are not aware of any findings of this plastic substance in any of the tests," Vidarte told the AP.  "We, officially and unofficially, have no information on anything to do with this. There were no traces of plastic in any of the tests."  Francisco Contador, the rider's brother and manager, also denied there was blood doping. "There is not even the remotest possibility of speaking of blood manipulation because Alberto has not done anything illegal, neither in the Tour or ever," he told Cadena Ser radio.  "We have absolutely nothing to hide."  The World Anti-Doping Agency bans blood transfusions or any intravenous infusions, except in a medical emergency, according to the Times.  The International Cycling Union drug-testing chaperones took the urine sample from Contador on July 20, the eve of the Tour's final rest day, said the person, who wanted to remain anonymous because of an agreement to keep the information confidential while Contador's investigation is continuing, the newspaper reported.  Contador tested positive for clenbuterol one day later, and was subsequently provisionally suspended by the ICU, which could strip him of his Tour crown and suspend him for two years if he is convicted of a doping offense.  Stories out of France and Germany last week also said traces of a plasticizer were found in Contador's urine, the Associated Press reported.  Contador has repeatedly denied doping or having a transfusion, instead blaming the clenbuterol on contaminated meat.  UCI spokesman Enrico Carpani told the AP on Tuesday that the cycling body was working with WADA to analyze the elements of Contador's case. He said the UCI would not comment further, citing confidentiality rules.  You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference.
Reports by the Associated Press and The New York Times indicate that Tour de France winner Alberto Contador could be facing more doping questions.