Oklahoma Administrative Code (Last Updated: March 11, 2021) |
TITLE 252. Department of Environmental Quality |
Chapter 302. Field Laboratory Accreditation |
Subchapter 7. Proficiency Testing |
SECTION 252:302-7-9. Supplemental studies
Latest version.
- A laboratory may elect to participate in PT studies more frequently than required by the semiannual schedule. Additional studies are not distinguished from the routinely scheduled studies. They are counted and scored the same way and must be at least fifteen (15) calendar days apart from the date of analysis.