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Data for Permitting and Remediation Must be Generated by Accredited Labs

Affects analytical data submitted to us that is related to permitting or remediation.

For permitting or remediation decisions, analytical data submitted to us must be generated by a lab that our Texas Laboratory Accreditation Program has accredited under the NELAP standard for matrices, methods, and parameters of analysis, unless:

  • The lab is an in-house lab and meets one of these criteria:
    • The lab performs work for its owner, for another company with a unit located on the same site, or without compensation for a governmental agency or charitable organization.
    • The lab is in another state and is accredited or inspected by that state.
  • The lab is accredited under federal law.
  • The data are needed for emergency-response activities and no TLAP-accredited lab is available.
  • The lab supplies data for which we do not offer accreditation.


We accept analytical data for a permitting or remediation decision only if the data comply with all applicable rules for the regulatory program involved and:

  • the lab generating the data is NELAP-accredited by TLAP,
  • we have approved an exception as described above, or
  • the data were generated on or before June 30, 2008.


This policy is based on the requirements of Title 30 Texas Administrative Code Sections 25.4 Exit the TCEQ and 25.6 Exit the TCEQ. As well as applying to data submitted to us, this policy applies to analytical data kept on site for review by our staff.

NELAP stands for National Environmental Laboratory Accreditation Program, now part of the NELAC Institute Exit the TCEQ.

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Contact us if you have questions about laboratory accreditation or one of these affected programs:
• Air Permits
• IHW Permits
• MSW Permits
• Radioactive Materials
• Remediation
• Sludge Permits
• Storm Water Permits
• UIC Permits
• Wastewater Permits