EPA Method 551.1 Surrogate Standard Back Catalog number: 30102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70402 Methapyrilene HCl Price on request 679448 Heptachlor endo-epoxide, 100 µg/ml, Methanol, 1m Price on request A634300 Ampicillin, 1g Price on request