The Dye Tracing Pages

Sample Custody and Storage Records

SAMPLE CUSTODY Water samples and charcoal and cotton dye receptors are received via overnight courier. Chain-of-custody forms are signed and the project name, date and time of arrival are recorded in a bound laboratory logbook. One copy of the chain-of-custody form is added to the laboratory custody records and a second copy is taped to the sample container and locked in a refrigerator. Water samples collected with an ISCO Automatic Water Sampler are kept in the sampler bottom, which is custody sealed and noted on the Chain-of-custody form. SAMPLE STORAGE Samples are kept in a locked refrigerator in a laboratory to which no one but laboratory personnel have access.