041-2 Wyo. Code R. §§ 2-12 - Clearance Sampling

(a) Clearance sampling shall be performed in the same manner as assessment sampling as qualified in this section.

(b) HVAC system clearance shall be performed by collecting Target Compound wipe samples from the furnace, one supply duct and one return duct if present. Sample locations in ductwork shall be randomly selected from areas that are not reachable from existing openings such as vents. Fresh openings for sampling shall be made using tin snips or other cutting means.

(c) Sample locations of the structure and any remediated movable items shall be randomly selected.

(d) Any repeat clearance sampling shall include locations that indicated failure as well as additional locations that were not previously sampled.

(e) If clearance sample data indicates that some part(s) of a structure are in compliance with the AL (or AL-LAA as applicable) and some are not, the following procedures may be used:

1) The whole structure may be re-cleaned and entirely re-tested.

2) The rooms or areas where clearance data indicates compliance may be sealed off from the rest of the structure, provided that egress during remediation does not require any re-entry to those areas, and the non-compliant areas may be re-cleaned and re-tested.

Notes

041-2 Wyo. Code R. §§ 2-12