EPA Method 515.1 Surrogate Standard Back Catalog number: 30022 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679892 o-Toluidine, 100 µg/ml, Acetonitrile, 1ml Price on request 673969 1H-Benzotriazole, 100mg Price on request 95401 Aroclor 1016 & Tetrachloro-m-xylene Price on request