The ability of methods to meet the standards of performance, as contained in this Article, shall be subject to evaluation by the Department using either a laboratory's internal quality control or external proficiency testing results, or both.
Cal. Code Regs. Tit. 17, § 1188
Note: Authority cited: Sections 208, 11881 and 11885, Health and Safety Code. Reference: Section 11885, Health and Safety Code.