30 Ml Vial found in: 30 mL Polypropylene Vials, Screw neck vials (EPA), N 24, Polypropylene Vial Racks, 30 ML VIAL, 22-400, CLR, NO CAP,LAB FILE, Thomas.. 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