Reply To: Lab 30 Edition 5 March 2022 – Draft for Consultation

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Participant Air sampling within an asbestos enclosure (including hygiene facility) for subsequent analysis in accordance with HSG 248 for clearance indicator testing should normally be undertaken in dry conditions. In the event that such conditions are not met, analysts shall record and report the actions taken along with any deviations and the reasons stated. Where wet enclosures are encountered and cannot be rectified promptly then the visual inspection will fail.

    Seems to contradict each other.

    What do other analysts do when you have an enclosure where part of it cannot be dried out e.g. in a sub-basement where water from an unknown source is present e.g. seeping through the ground. The LARC has tried to wet vac it up but it continually returns. Would you caveat your 4SC to mention that you could not inspect the wet area, you wouldn’t be able to brush that section either at stage 3.

    Or is it a fail until the area finally drains?

    Granted if the work was planned fully the LARC may be able to solve the water problem – but how does the LARC and building owner move forward when water ingress cannot be stopped?

    248 has this guidance:

    A5.69 If a wet enclosure is identified at the outset of the 4-stage clearance then action should be taken to rectify the situation (eg area will need to be dried up and, if necessary, arrangement of a plumber to enter the enclosure and repair the leak). The incorrect use of sealants, however, may cause significant delays in completing the thorough visual inspection (see paragraph A5.71). An analyst should fail the visual examination if the enclosure is wet and the situation cannot be promptly rectified. If the visual examination does go ahead with the enclosure still wet or damp, photographs of the area affected should be taken and the information clearly recorded as to what areas were wet or damp and why this could not be dried out. Failure to remove and clean away any water should be treated as incomplete cleaning. Lack of time available after cleaning is not an acceptable reason, as this will also make any air disturbance sampling in stage 3 invalid.