Benz(a)anthracene-d12, 2.0mg/mL in CH2Cl2. 1mL

4-Chloro-3-methylphenol, 100µg/ml in MeOH, 1ml

4,4'-Dibromobiphenyl-d8,100 µg/mL,isooctane,1mL,

EPA Method 552.1 - Surrogate Standard