Benzene, neat, Solvent-neat, Unit 5mL, # of units-1, Cas.no. 71-43-2

1-Acenaphthenol, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 6306-07-6

Chlorotoluron-desmethyl, 100mg

EPA Method 551.1 Surrogate Standard