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Samples in periodicals archive:
In order to receive LEED certification, a building must be tested for carbon monoxide (CO), formaldehyde (CH2O), volatile organic chemicals (VOCs), 4-phenylcyclohexene (4-PCH), and dust particulate matter (CM-10).
Toxics found in the new and renovated buildings included styrene, a recognised carcinogen, odour-producing toxics 4-phenylcyclohexene and nonaldehyde, and irritation levels of formaldehyde.
Suspicion hovered around chemical by-product emissions from carpet backing or adhesives, including something called 4-phenylcyclohexene (4-PC).