John Dirks Jr Posted March 10, 2014 Report Share Posted March 10, 2014 What is the white coloration on the interior of this under slab transite ductwork? Could it be deterioration and friable asbestos fibers? Click to Enlarge 41.92 KB Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted March 10, 2014 Report Share Posted March 10, 2014 It looks like efflorescence. Quote Link to comment Share on other sites More sharing options...
John Dirks Jr Posted March 10, 2014 Author Report Share Posted March 10, 2014 It looks like efflorescence. Good call. I should have figured that. It makes sense considering the moisture concerns related to this under slab duct work. Quote Link to comment Share on other sites More sharing options...
John Kogel Posted March 11, 2014 Report Share Posted March 11, 2014 John is that pic laying on its side? I think if you rotate the pic, the efflorescence would show the ground water level, maybe? I would not dismiiss the possibility of friable asbestos either, because somebody might decide to swab the pipes and have a lab test done of those particles. Quote Link to comment Share on other sites More sharing options...
John Dirks Jr Posted March 11, 2014 Author Report Share Posted March 11, 2014 John is that pic laying on its side? I think if you rotate the pic, the efflorescence would show the ground water level, maybe? I would not dismiiss the possibility of friable asbestos either, because somebody might decide to swab the pipes and have a lab test done of those particles. Trust me, I always cover my butt when it comes to this stuff. That picture is oriented correctly. It's displayed as right side up. If you look close you can see some debris sitting at the bottom of the pipe. Quote Link to comment Share on other sites More sharing options...
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