Table 8. Summary of QC requirements for TSS QC Sample or Activity Minimum Frequency Acceptance Criteria Corrective Action Four (4) prepared samples 90 – 110% R Capability demonstration analyzed prior to any Repeat until acceptable < 10% RSD customer sample analyses Investigate problem including cleaning weight and balance. If Balance Calibration Prior to weighing any Weight of certified 200 mg weight: balance is out of calibration Check sample filters 0.1998 – 0.2002 g attempt recalibration or use another balance until obtain acceptable calibration check. Investigate, identify, and correct the problem. If system At least one (1) per Method Blank accuracy is in control, qualify analysis batch of up to 10 For 1.0 L blank filtered: < 1.0 mg/L results. If system accuracy is samples out of control, correct problem before analyzing samples If total residue on filter < 2.5 mg report result as < RL Total residue on filter: Sample analysis For all sample analyses If total residue on filter > 200 >2.5 mg to < 200 mg mg filter a smaller volume of sample. Investigate, identify, and correct problem. If system Laboratory Control accuracy is in control, qualify At least one (1) per year 90 – 110% R Sample results. If system accuracy is out of control, correct problem before analyzing samples. Investigate problem. If system precision is in control, qualify One (1) per preparation Sample duplicate RPD ≤ 5% results. If system precision is batch of up to 10 samples out of control, reanalyze entire batch. Samples and frequency Criteria for LCS recovery and duplicate Investigate all unacceptable Internal PE sample determined by Lab QA precision results. Officer Samples and frequency Investigate all unacceptable Blind PE sample determined by accrediting Determined by PE provider results. agencies and projects LCS = laboratory control sample QC = quality control MB = method blank %R = percent recovery MDL = method detection limit RL = reporting limit where RL = (2.5 mg /mL filtered) x 1000 mL MS = matrix spike RPD = relative percent difference PE = performance evaluation RSD = relative standard deviation
Table 8. Summary of QC requirements for TSS QC Sample or Activity Minimum Frequency Acceptance Criteria Corrective Action Capability demonstration Four (4) prepared samples analyzed prior to any customer sample analyses 90 – 110% R < 10% RSD Repeat until acceptable Balance Calibration Check Prior to weighing any sample filters Weight of certified 200 mg weight: 0.1998 – 0.2002 g Investigate problem including cleaning weight and balance. If balance is out of calibration attempt recalibration or use another balance until obtain acceptable calibration check. Method Blank At least one (1) per analysis batch of up to 10 samples For 1.0 L blank filtered: < 1.0 mg/L Investigate, identify, and correct the problem. If system accuracy is in control, qualify results. If system accuracy is out of control, correct problem before analyzing samples Sample analysis For all sample analyses Total residue on filter: >2.5 mg to < 200 mg If total residue on filter < 2.5 mg report result as < RL If total residue on filter > 200 mg filter a smaller volume of sample. Laboratory Control Sample At least one (1) per year 90 – 110% R Investigate, identify, and correct problem. If system accuracy is in control, qualify results. If system accuracy is out of control, correct problem before analyzing samples. Sample duplicate One (1) per preparation batch of up to 10 samples RPD ≤ 5% Investigate problem. If system precision is in control, qualify results. If system precision is out of control, reanalyze entire batch. Internal PE sample Samples and frequency determined by Lab QA Officer Criteria for LCS recovery and duplicate precision Investigate all unacceptable results. Blind PE sample Samples and frequency determined by accrediting agencies and projects Determined by PE provider Investigate all unacceptable results. LCS = laboratory control sample QC = quality control MB = method blank %R = percent recovery MDL = method detection limit RL = reporting limit where RL = (2.5 mg /mL filtered) x 1000 mL MS = matrix spike RPD = relative percent difference PE = performance evaluation RSD = relative standard deviation
Withers%20MST%20QAPP%2001072013.docx