Chain of Custody

The Chain of Custody (COC) is used to document information about the sample(s) such as identification/name, time/date of collection, parameter requests and the legal transfer of sample custody. COCs are included with every bottle order we provide. A print version and interactive version of our Chain of Custody are also available.

Print Version

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Quick Resources

Holding Times & Preservation Card

Get our convenient holding times and preservation reference card.


Short Hold Time Parameters Chart
Download our sample turnaround table guidelines.


Download the Eastern Analytical, Inc. Reference Card.


Chain of Custody Forms

Download one of our chain of custody forms.

Print version

Interactive version

Residential Drinking Water Information
Get our homeowner drinking water guide and residential chain of custody form.

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Drinking Water Resources