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A, . <br /> Samples are stored in 40-milliliter vials so that air passage through the <br /> sample is minimized (to. prevent volatilizing the sample) . The vial is <br /> tilted and filled slowly until an upward convex meniscus forms over the <br />. mouth of the vial . The teflon side of the septum (in cap) is then placed <br /> against the meniscus, and the cap is screwed on tightly. The sample is <br /> then inverted and the bottle is tapped lightly to check for air bubbles. <br /> If an air bubble is present in the vial the cap is removed and more sample <br /> is transferred from the bailer. The vial is then resealed and rechecked <br /> for air bubbles. The sample is then appropriately labeled and stored on <br /> ice from the time of collection through the time of delivery to the <br /> laboratory. A Chain-of-Custody form is completed to ensure sample <br /> integrity. Ground-water samples are transported to a state-certified <br /> laboratory and analyzed within the EPA-specified holding times for the <br /> requested analyses. <br /> i <br />