Question 1

What does 0.01 fibres per cubic centimetre mean for my Ottawa job?

Accepted Answer

The 0.01 fibres per cubic centimetre figure is the clearance threshold set by O. Reg. 278/05, section 18, for the PCM air-sampling method. Every air sample collected inside the enclosure after Type 3 asbestos work must come in at or below that concentration for the area to pass. If any single sample exceeds it, the area does not pass.

What this means for your job

Clearance air testing under section 18 applies only after Type 3 work, which is the removal or disturbance of more than one square

Question 2

What is a clearance air test after asbestos removal in Ontario?

Accepted Answer

A clearance air test is the air test O. Reg. 278/05 requires inside the enclosure after Type 3 asbestos removal, once the enclosure is dry. Published Ontario contractor prices read in September 2026 put it at about $300 to $800.

What the regulation requires

Section 18 of O. Reg. 278/05 is the only place clearance air testing appears. Once the enclosure is dry after Type 3 work, a competent worker collects air samples inside it. There are two accepted methods. Under the PCM method, every sampl

Clearance & Air Testing

What does 0.01 fibres per cubic centimetre mean for my Ottawa job?

What is a clearance air test after asbestos removal in Ontario?