EPA Method 507/525 Analyte Mix #1

Thiophene/2-Methylthiophene (2:1) in isooctane/Toluene(3:1); Units: 5x1mL ampoules, 1x10mL screw-capped bottle Chiron No. Concentration µgS/g (ppm) Wt.% S-4056-0 Blank 0 S-4056-5 5

GRO Standard C6-C10, 2000µg/ml in MetChloride, 1ml

2,4'-DDT, 10 µg/mL in Cyclohexane, 10ml