EPA Method 551.1 Internal Standard

5-Methyl-1-naphthol, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 51149-87-2

3, 5-Cyclocholestane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 17132-01-3

8-Bromo-2,3,4-trichlorodibenzofuran, 1.2ml x 50ug/ml, toluene