- (a) The laboratory shall develop and implement a quality system in accordance with Volume 1, Module 2 of the TNI standards that incorporates the essential quality control requirements specified in Volume 1, Modules 3 through 7 of the TNI standards.
- (b) If the quality control requirements of Volume 1, Modules 2 through 7 of the TNI standards and the requirements in an approved method differ, the laboratory shall use the requirements that result in a higher level of confidence in testing results.
- (c) The laboratory shall analyze laboratory control samples whenever whole volume material, concentrated material, or spiking solution material is available to create or otherwise prepare laboratory control samples.
- (d) An appropriate clean matrix material shall be used in laboratory reagent blank and laboratory control sample preparation associated with solid and chemical materials and biological tissue analytical procedures.
Source. (See Revision Note at chapter heading for Env-C 300) #12065, eff 1-1-17; ss by #13291, eff 11-23-21