EPA Method 502/524 Surrogate Standard #2

5-Chloro-2-(2,4-dichloro[13C6]phenoxy)[13C6]phenol, 1.2ml x 50ug/ml, methanol

Tepraloxydim, 100 µg/ml, Acetonitrile, 5ml

Difenoxuron,100 µg/mL,MeOH,1mL,