BTEX - Mix 6, 1000µg/ml in MeOH, 5ml

PAH - Mix 16 (EPA 550/610), 100µg/ml in Cyclohexane, 5ml

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

EPA Method 508 Surrogate Standard