EPA Method 8315 Calibration Mix #2 Back Catalog number: 83510 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended BPB 2,2-Bis(4-hydroxyphenyl)butane, 1.2ml x 50ug/ml, methanol Price on request 676267 Fenthion-oxon-sulfone, 100 µg/ml, Acetonitrile, Price on request 55199 WP Low Level Perchlorate Price on request