EPA Method 551.1 Performance Check Soln Back Catalog number: 30104 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92713 Chlorinates Standard Price on request 66056 2,3,3',4'-Tetrachlorobiphenyl (56) Price on request 12117.18-100-ME Clofibrate,100 µg/mL,MeOH,1mL, Price on request