For your convenience, we are providing the following forms. Please click on the appropriate link for a printable PDF form. If you have any questions about which form to use, or need other documentation, please contact us at 713-453-6060 or

Chain of Custodies

If you’re unsure of which Chain of Custody (COC) to use, please use the Environmental COC.

Need help filling out your Environmental Chain of Custody form? View our instruction guide to assist you!

Client Forms

Environmental Testing Resources