GeoTesting Express Laboratory Testing Field Testing Qualifications Contact Us

Sending Us Samples

- Request a Quote

Provide us with project specific information regarding the quantity and type of tests you require and receive a custom quote.

- Complete a Chain of Custody/Test Assignment Form

Complete a Chain of Custody/Test Assignment Form and send a copy with your samples (and/or email it to us).

- Transport Samples to Us

Samples may be dropped off, mailed to us or shipped to us via a carrier (UPS, FedEx, etc.). Also, in many cases, GTX can pick up and transport samples to our laboratory. To request a sample pickup, please call (978)-635-0424 or email

Click here for sample drop off instructions.

****OUTSIDE OF United States****

► Click here for instructions for sending samples from outside of the United States

For more information on transporting samples, please click the appropriate link below