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Mould in Carpet

Please provide professional advice in regards to what the correct and most accurate procedure would be to obtain muld samples from a carpet.

Recently a member of the public took a swab test of a carpet in a demonstration kitchen (however- the cooking section has tiles, the carpet is where the audience sit and observe) and discovered 2 cfu's of stachybotyrus. Is this of concern when that low a concentration is found and all other swab and R.C.S. (air monitoring) measurements results found no other contamination of mould? There may have been a leak in the past in the building a long time ago, but an thorough assessment of the building found no problems of mould. Therefore, there is no leak at the time of the mould sample.

Is a swab test thorough enough, would a tape sample be better?
Since there was no other indication of mould, shouldn't certain questions be asked regarding when the samples were taken?

Am I missing anything? Could the sample of stachy be a positive result due to some other factor? If there was a leak, and the swab sample did yield 2 CFU's, could this be indicative of the past leak, and easily cleaned?

If this is not a problem, how can I calm the people who work in this office?

I have attached the results... but not the air monitoring results as they have concluded no airborne species of mould were found.


Solution Preview

This seems to be a very low level of detection (2 cfu is low), but it depends on how large an area was swabbed. If it was a tiny fraction of the carpet, you may have a reasonably high overall level. The concern should be whether these low levels could turn into higher levels. This test result is a couple of ...

Solution Summary

The solution discusses how to deal with testing for health and safety relating to mould in carpet.