The requirements of this Part shall apply to proficiency testing (PT) for drinking water and general environmental laboratories applying for accreditation or maintaining accreditation.
Okla. Admin. Code § 252:307-9-1
The requirements of this Part shall apply to proficiency testing (PT) for drinking water and general environmental laboratories applying for accreditation or maintaining accreditation.
Okla. Admin. Code § 252:307-9-1