EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679350 4-Chloronitrobenzene, 100 µg/ml, Methanol, 1ml Price on request 92241 Phenol Mix Price on request 94863 1664 Oil & Grease Calibration Level #1 Price on request