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Liquid waste samples submitted for analysis should meet the following requirements:
- place sample in a sealed plastic container with about a 1-pint volume. Glass is not suitable because it is breakable and may contain contaminants.
- leave 1 inch of air space in the plastic container to allow for expansion caused by the release of gas from the waste material.
- refrigerate samples that cannot be shipped on the day they are collected; this will minimize chemical reactions and pressure buildup from gases.