The following sample was certified using USEPA SW846, 3rd edition, method 8260, and is ideal for methanol extractionCertified valuesBenzene56.5 μg/kg Styrene 39 μg/kg Carbon tetrachloride .44.8 μg/kg 1,1,1,2-Tetrachloroethane 99.8 μg/kg Chlorobenzene52.6