Clearance of Asbestos Post Abatement

Post-abatement clearance air monitoring shall include at a minimum the number of area samples specified below, to be taken inside each homogeneous work area. For small asbestos projects, a minimum of three.

For large asbestos projects, a minimum of five. In addition to the 5 sample minimum, one representative area sample shall be collected for every 5,000 square feet above 25,000 square feet of floor space when ACM has been abated.

When TEM analysis is employed a minimum of 5 samples from outside the work area shall also be collected.

For small asbestos projects solely employing glovebag procedures, post-abatement clearance air monitoring is not required, unless the integrity of the glovebag was compromised or visible emissions were detected outside the glovebag and/or levels exceeded 0.01 flee during abatement or 0.05 flee for pre-demolition abatement activities. In such cases, post-abatement clearance air monitoring procedures outlined in the applicable subdivision of §1-41(d) shall be followed.