SECTION 252:301-9-54. Inorganic chemistry

Latest version.

  If approved methodologies do not specify minimum laboratory QA/QC requirements for inorganic chemistry, the following frequencies shall apply:
(1)   A minimum of three concentrations of standards for daily calibration plus one continuing calibration check standard after each ten samples tested. The lab should repeat all samples tested after the last acceptable continuing calibration check if the continuing calibration check standard is outside plus/minus 10%.
(2)   One blank per twenty samples tested (or batch).
(3)   If applicable, one spike per twenty samples tested or one per batch.
(4)   One duplicate or spiked duplicate per twenty samples tested or one per batch.

[Source: Added at 25 Ok Reg 2247, eff 7-11-08; Amended at 36 Ok Reg 1595, eff 9-15-19]

                    
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