Sample Acceptance Policy

Effective Date: March 24, 2022

Enthalpy Analytical, including its affiliate laboratories, may not accept samples for testing if they do not meet the following criteria:

  • Samples arrive with a complete Chain of Custody (CoC) specifying at the minimum: client’s name and contact information; sampler’s name; sample identification and number of containers; sampling location, date and time(s); requested test methods, matrix and compound list.
  • Sample containers are properly and uniquely identified to match the CoC.
  • Samples arrive in containers that meet the selected method(s) requirements, with appropriate preservation and within the temperature requirements.
  • Sample containers have adequate amounts/volume of sample as specified by the selected method(s).
  • Samples arrive to the laboratory within reasonable time to be analyzed before the holding time expiration.

If any of these requirements are not met, the samples may be put on hold and the client will be contacted for further directions.

If the sample collection time is not provided, the laboratory will use the most conservative time (12:00am of the date provided).

All deviations or anomalies will be described in the narratives.

Please contact your lab directly if you have any questions regarding sampling. Need a Chain of Custody (COC) form? Download it here.

Enthalpy Analytical, LLC Laboratories


800 Capitola Drive, Suite 1, Durham, NC 27713 | 919.850.4392
1941 Reymet Road, Richmond, VA 23237 | 804.358.8295
2625 Denison Drive, Mt. Pleasant, MI 48858 | 989.772.5088
2714 Exchange Drive, Wilmington, NC 28405 | 919.850.4392
931 West Barkely Avenue, Orange, CA 92868 | 714.771.6900
1104 Windfield Way, El Dorado Hills, CA 95762 | 916.673.1520
931 Seaco Court, Deer Park, TX 77536 | 281.984.7021
2525 West Bellfort Street, Houston, TX 77054 | 713.666.0020

Enthalpy Analytical, LLC Service Centers


2323 5th Street, Berkeley, CA 94710 | 510.486.0900
7411 Laurel Canyon, Suite 8, North Hollywood, CA 91605 | 714.771.9904
4340 Vandever Avenue, San Diego, CA 92120 | 585.587.7333