https://ift.tt/2N9gCm7 has been a lot of construction on the floor of our building. A lot of people who work on that floor (including myself) have been getting sick pretty often (nausea, fatigue, headaches).At some point we saw this blue stuff and I couldn't for the life of me figure out what kind of material it is. One person thinks it could be mold. I have no idea if that's what's making us sick or not. We're just curious what this blue stuff could be.Please let me know if this isn't the right sub to post this type of question. Any info is greatly appreciated! via /r/DIY https://ift.tt/2KOVmFv
