Vials found in: J.G. Finneran TOC Certified Vials, DWK Life Sciences Sample Vials in Vial File, DWK Life Sciences Serum Tubing Vials, Sterile Glass.. These clear 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).