EPA Method 524 & 624 - Internal Standard

Clofibrate, 100 µg/ml, Acetonitrile, 1ml

2,2',3,3',4,5,6,6'-Octachlorobiphenyl ,100 µg/mL,isooctane,1mL,

3,3',4,4',5,5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane