EPA Method 551.1 Internal Standard

2-Methylindole, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 95-20-5

Trichloroacetic acid (TCA), 100µg/ml in MTBE, 5ml

2,2',3,4',5,5',6-Heptachloro-4-biphenylol, 1.2ml x 50ug/ml, nonane