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 of our Chain of Custody is available below.

Download Form

If you would like to receive an interactive version of our COC, please email

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.

Download Form

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

View PDF’s

Drinking Water Resources
Sampling Instructions