EPA Method 551.1 Performance Check Soln Back Catalog number: 30114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended M4M172 2,2',3,3',4,5,5'-Heptachloro-4'-methoxy[13C12]biphenyl, 1.2ml x 50ug/ml, toluene Price on request SCP150-075-005 CONOSTAN 75cSt Base Oil, 500ml Price on request 676792 4-tert-Octylphenol-mono-ethoxylate, 10.0 µg/ml, A Price on request