Epa Vial found in: EPA Vials, Environmental EPA Vials, EPA Vials, PrePreserved® Glass EPA Vials, Silanized - 20mL Clear EPA Vial, 28x56mm, 24-400mm Thread,.. screw thread EPA vials for the collection and storage of water samples comply with the guidelines for establishing test procedures for the analysis of pollutants (Ref. EPA Methods 601, 602, 603 and 604).