Word: arsenicals
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...occupants' cooking, cleaning and smoking habits. But nearly everywhere, dust consists of some combination of shed bits of human skin, animal fur, decomposing insects, food debris, lint and organic fibers from clothes, bedding and other fabrics, tracked-in soil, soot, particulate matter from smoking and cooking, and, disturbingly, lead, arsenic and even...
There's not much to fret about in simple particles of dirt or organic materials such as pollen (though they can trigger allergies), but lead, arsenic and DDT can be a more serious matter. About one-third of the arsenic in the atmosphere comes from natural sources - volcanoes principally. The rest comes from mining, smelting, burning fossil fuels and other industrial processes. Even in relatively low concentrations, arsenic is not without risk, especially to small children who play on the floor and routinely transfer things from their hands to their mouths. The same is true for lead, which comes less...
...your own dust loading - and it's important that you try. Dust mites, which feed on shed skin, produce allergens that are known triggers for people suffering from asthma. Same goes for cockroach dust, especially in cities. No one needs much convincing about the wisdom of getting rid of arsenic, and the good news is that about 80% of it can be removed simply by cleaning floor dust regularly...
...contamination currently poses no health risks since the arsenic remains underground, but Harvard must now “remediate” the soil—to remove or contain the affected soil—to facilitate the completion of the sale, according to James Gray, associate vice president of Harvard Real Estate Services...
...While arsenic contamination is typically eliminated by removing affected soil, Harvard is considering “encapsulating” contaminated areas, essentially burying affected soil, Gray said. This option not only costs less but also preserves the site’s aesthetic appeal, as the removal of soil would lead to the uprooting of vegetation. Gray added that the “encapsulating” method is environmentally safe, as long as the land is held in perpetuity as green space...