Certification of an environmental testing laboratory that analyzes samples for compliance with the Safe Drinking Water Act shall be based on a laboratory's conformance to standards contained in the Manual for the Certification of Laboratories Analyzing Drinking Water, Fourth Edition, EPA 815-B-97-001, March 1997; and the Lab Cert Manual Errata, Labcert Bulletin, EPA-815-N-99-002a, April 1999, published by the EPA, and the requirements of this chapter.
30 Tex. Admin. Code § 25.50