WS Benzo(a)pyrene - Cal Check

2,4,6-Trichloroanisole, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 87-40-1

Chlorpyrifos-methyl, 100µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 5598-13-0

EPA Method 200.8