CMA CMA Sampling & Testing Methods 3

Question 1

According to AIHA guidelines, what is the recommended chain of custody procedure for mold samples?

Accepted Answer

A completed chain of custody form must accompany samples from collection through laboratory receipt

Answer

Samples may be shipped without documentation if labeled correctly

Answer

Chain of custody is only required for litigation samples

Answer

The laboratory is responsible for creating chain of custody after receiving samples

Question 2

What is the significance of a laboratory reporting 'TNTC' (Too Numerous To Count) on a culture plate result?

Accepted Answer

Colony density exceeded reliable counting limits, requiring sample dilution or re-sampling

Answer

The sample was contaminated during transport

Answer

No mold growth was detected

Answer

The sample volume was insufficient for analysis

Question 3

Which type of sampling is most appropriate to determine if a specific surface area is contaminated with mold when the surface appears clean after remediation?

Accepted Answer

Surface swab or tape lift from the cleaned surface

Answer

Bulk sample from adjacent building materials

Answer

Air sampling in the center of the room

Answer

Settle plate placed near the surface for 24 hours

Question 4

What does a 'raw spore count' from a spore trap analysis represent?

Accepted Answer

The actual number of spores counted on the analysis slide before any calculations

Answer

The count per cubic meter of air after volume correction

Answer

The percentage of spores that are viable

Answer

The number of colony-forming units per plate

Question 5

When should a mold assessor collect settled dust samples rather than air samples?

Accepted Answer

When assessing long-term or cumulative mold exposure over months or years

Answer

When immediate results are needed

Answer

When the building is occupied and air sampling would disturb residents

Answer

When the outdoor weather prevents accurate air comparisons

Question 6

What laboratory accreditation program is widely recognized for mold analytical laboratories in the United States?

Accepted Answer

AIHA-LAP, LLC (American Industrial Hygiene Association Laboratory Accreditation Program)

Answer

ISO 9001 Quality Management

Answer

EPA Method 8270 certification

Answer

OSHA 1910.132 compliance certification