EPA Method 500 Series Internal Standard #5

3-Methyl-1-naphthol, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 13615-40-2

D6-Omethoate, 100 µg/ml, Acetone, 1ml

Benzyl n-butyl phthalate-3,4,5,6-d6,1000 µg/mL,isooctane,1mL,