Acceptable. 9 pH SOP does not Duplicate analysis of WWCM1; N/A include analysis samples shall be performed Chapter of duplicate once per batch of twenty II samples or a samples, at a minimum. Sections quarterly quality Sample batch may extend 4.3.1.4, control sample beyond one day. 4.3.2.1; (QCS). Acceptance criteria for Chapter duplicates must be III specified in QAP and/or Sections SOP (± 20% RPD). 7.0, 7.3 A quality control sample (QCS) shall be analyzed at least quarterly. A purchased second source standard (used for 4.3.1.2) that is a primary standard meets this requirement and no additional QCS is needed.
9 pH SOP does not include analysis of duplicate samples or a quarterly quality control sample (QCS). Duplicate analysis of samples shall be performed once per batch of twenty samples, at a minimum. Sample batch may extend beyond one day. Acceptance criteria for duplicates must be specified in QAP and/or SOP (± 20% RPD). A quality control sample (QCS) shall be analyzed at least quarterly. A purchased second source standard (used for 4.3.1.2) that is a primary standard meets this requirement and no additional QCS is needed. WWCM1; Chapter II Sections 4.3.1.4, 4.3.2.1; Chapter III Sections 7.0, 7.3 Acceptable. N/A