Why did the test consultant collect samples at different volumes outdoors and indoors?
In the most recent tests that we had done the outdoor sample consisted of 90 liters and the indoor samples consisted of 30 liters. I know that the spores per cubic meter are adjusted to reflect the size of the sample, but still we are wondering if that kind of a sampling approach makes sense. I have seen at least one person question the competence of a tester when the outdoor sample was 150 liters and the indoor sample was 30 liters. Whoever said that the difference in sample volumes is an error has shown you that they have an incomplete understanding of the science of test instruments, and certainly has not looked at samples in a lab. Indoors the overall airborne particle level is often higher than outside (unless you’re next to a compost facility or a leaf blower). We have to adjust the indoor sample size down to avoid overloading the sample (see our comments about too much debris in samples). True a shorter sample period is less representative, but I’ve already addressed this issue
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- Why did the test consultant collect samples at different volumes outdoors and indoors?
