One Fibre per Cubic cm Air (1 f/cc)

On this site, 1 f/cc refers to the allowable exposure limit for fibreglass, rock wool, and slag wool insulations. 1 f/cc is the ACGIH TLV, the HSPP voluntary exposure limit recommended by the National Academy of Sciences, and the State of California’s established PEL for fibreglass, rock and slag wool insulation fibres.