Method 429 Alternate Standard Stock Solution, 1.2ml, isooctane

4-n-Nonylphenol

2,2',3,3',5,5',6,6'-Octachloro-4-methoxybiphenyl, 1.2ml x 50ug/ml, nonane

Atrazine-2-hydroxy D5, 100µg/mL in MeOH, 1,1ml