EPA Method 502/524 Surrogate Standard #1 Back Catalog number: 30070 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70138 1,1-Dichloroethene, 1000µg/ml in MeOH, 1ml Price on request 93127 NCGSI Standard Price on request 675137 Carfentrazone (free acid), 100 µg/ml, Acetonitril Price on request