The samples we received from Alberta arrived several weeks after we finished dealing with the Quebec samples. Between the two, there was a period during which there were no samples from Quebec in the lab where the tests were performed.
Everything was checked, and quality control measures were taken. The agency's labs are recognized and accredited by the Standards Council of Canada. All procedures were followed. We were assured that there was no contamination from the Quebec samples because several weeks had elapsed between the two processes, and disinfection procedures had been followed.
To ensure that equipment has been cleaned properly, we always validate using negative control samples. That is done before we begin testing on samples from new fields. When it comes to results, we do everything possible to ensure that the samples have not been contaminated by other samples processed in the same lab.