The laboratory to which the samples referred to in article R. 241-5 have been sent analyses the first of the samples referred to in article R. 241-6 and draws up an analysis report.
It retains the second sample for possible control analysis.
This control analysis is automatic if it is requested by the person or persons mentioned in 1° of article R. 241-4. It is carried out in the same laboratory as the first analysis.
If the person mentioned in 1° of article R. 241-4 or his representative are not available on the dates proposed for the analysis of the sample, the laboratory will carry out the analysis in the presence of an independent witness, which it will designate, at the expense of the person concerned.
The costs of the control analysis shall be borne by the person concerned.