29.- On 19 July 2021, CHINADA provided clarifications on certain points, thus following up on a request from Marissa SUNIO of 14 July 2021 (para. 25 above). The answers given concerned:
- two food supplements that had not been analyzed at first and which were analyzed afterwards, the analysis revealing that they did not contain TMZ;
- the very large number of searches undertaken so far in vain by the public authorities to determine the origin of environmental contamination;
- investigations into the TMZ manufacturing plant closest to the hotel, which was more than 200 km away, as the traces of TMZ found in the vicinity of that plant could not be correlated with the case of the swimmers;
- the difficulty of the searches, given the time that has elapsed, but which nevertheless continued;
- the unsuccessful investigations into a hotel staff member who may have taken TMZ and may have been the source of the contamination;
- details of the concentration of TMZ detected during checks of the hotel's kitchens and seasoning containers & others, which ranged from 0.03 ng/mL to 0.2 ng/mL.
32.- On 28 July 2021, at the initiative of Olivier RABIN, questions were again asked to CHINADA by Marissa SUNIO about the precise location of the traces of TMZ discovered in the carts where the containers of salt, spices, seasoning, etc. were kept. The answers given the next day gave few details. As far as we understand, no trace of TMZ was found inside the containers, nor in the food itself, CHINADA pointing out more than two months had passed and that the containers had necessarily been emptied and refilled.
33.- On July 30, 2021, Olivier RABIN began by noting that the latest information and answers given by CHINADA did not add much to what they already knew. Uncertainties about the source of contamination and the lack of TMZ measurements in a foodstuff made it almost impossible to design a realistic scenario. The results of the calculations he had attempted to perform in order to determine how much exposure to TMZ would have been required to reach 1 to 1.7 ng/mL at excretion resulted only in an estimation of “a few micrograms”, which was not sufficiently precise to confirm or exclude contamination. Olivier Rabin persisted in finding that "a few micrograms" was high for contamination and was surprised that the Chinese had not found, among the kitchen or hotel staff, a person taking TMZ. As he was unable to exclude the contamination scenario in a solidly substantiated manner, he saw no other solution than to accept it, even if he continued to have doubts about the reality of contamination as described by the Chinese authorities. Olivier RABIN reserved the position of Irène MAZZONI.
34.- Finally, on 31 July 2021, Irene MAZZONI, apologizing for the lateness of her response, agreed with Olivier RABIN's analysis, while expressing her difficulty in believing in the contamination due to the minimal doses found in the kitchen, which is moreover outside the food, two months after the competitions, without the origin of TMZ being identified; she nevertheless accepted that WADA did not have a solid argument to affirm that it was not contamination.