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Laboratory QC <br />Caltest Analytical Laboratory <br />QC Type Analyte Spiked Limits (%)Recovered Units Yield(%)Native <br />RPD <br />Limit(%)RPD% <br />Tel: (626) 386-1100 <br />Fax: (866) 988-3757 <br />1 800 566 LABS (1 800 566 5227) <br />878886 <br />SUBCONTRACT <br />PFAS <br />Report: <br />Project: <br />Group: <br />MS1_202006300488 Perfluoroundecanoic acid (PFUnA)0.025 0.0251 ug/L 100 (70-130)ND <br />EPA Method 537.1 by EPA 537.1 <br />Analysis Date: 07/06/2020Prep Batch: 1259068 Analytical Batch: 1259764 <br />DUP_202006300506 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid ND ug/L (0-30)ND <br />LCS1 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.024 0.0229 ug/L 97 (70-130) <br />LCS2 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.024 0.0232 ug/L 99 (70-130)1.330 <br />MBLK 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid <0.000667 ug/L <br />MRL_CHK 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.0019 0.00182 ug/L 97 (50-150) <br />MS_202006300497 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.0019 0.00174 ug/L 93 (50-150)ND <br />DUP_202006300506 13C2-PFDA (S)94.0 %94 (70-130) <br />LCS1 13C2-PFDA (S)100 97.4 %97 (70-130) <br />LCS2 13C2-PFDA (S)100 94.4 %94 (70-130) <br />MBLK 13C2-PFDA (S)99.2 %99 (70-130) <br />MRL_CHK 13C2-PFDA (S)100 99.8 %100 (70-130) <br />MS_202006300497 13C2-PFDA (S)100 93.1 %93 (70-130) <br />DUP_202006300506 13C2-PFHxA (S)94.9 %95 (70-130) <br />LCS1 13C2-PFHxA (S)100 97.4 %97 (70-130) <br />LCS2 13C2-PFHxA (S)100 96.8 %97 (70-130) <br />MBLK 13C2-PFHxA (S)97.0 %97 (70-130) <br />MRL_CHK 13C2-PFHxA (S)100 99.0 %99 (70-130) <br />MS_202006300497 13C2-PFHxA (S)100 92.2 %92 (70-130) <br />DUP_202006300506 13C2-PFOA– IS#1 (I)113 %113 (50-150) <br />LCS1 13C2-PFOA– IS#1 (I)100 108 %108 (50-150) <br />LCS2 13C2-PFOA– IS#1 (I)100 107 %107 (50-150) <br />MBLK 13C2-PFOA– IS#1 (I)110 %110 (50-150) <br />MRL_CHK 13C2-PFOA– IS#1 (I)100 106 %106 (50-150) <br />MS_202006300497 13C2-PFOA– IS#1 (I)100 114 %114 (50-150) <br />DUP_202006300506 13C3-HFPO-DA (S)89.5 %90 (70-130) <br />LCS1 13C3-HFPO-DA (S)100 95.6 %96 (70-130) <br />LCS2 13C3-HFPO-DA (S)100 93.4 %93 (70-130) <br />MBLK 13C3-HFPO-DA (S)94.3 %94 (70-130) <br />MRL_CHK 13C3-HFPO-DA (S)100 95.7 %96 (70-130) <br />MS_202006300497 13C3-HFPO-DA (S)100 88.9 %89 (70-130) <br />DUP_202006300506 13C4-PFOS– IS#2 (I)108 %109 (50-150) <br />LCS1 13C4-PFOS– IS#2 (I)100 102 %102 (50-150) <br />LCS2 13C4-PFOS– IS#2 (I)100 102 %102 (50-150) <br />MBLK 13C4-PFOS– IS#2 (I)106 %106 (50-150) <br />QC Report - Page 5 of 9 <br />Spike recovery is already corrected for native results. <br />Spikes which exceed Limits and Method Blanks with positive results are highlighted by Underlining. <br />Criteria for MS and Dup are advisory only, batch control is based on LCS. Criteria for duplicates are advisory only, unless otherwise specified in the method. <br />RPD not calculated for LCS2 when different a concentration than LCS1 is used. <br />RPD not calculated for Duplicates when the result is not five times the MRL (Minimum Reporting Level). <br />(S) - Indicates surrogate compound. <br /> (I) - Indicates internal standard compound. <br />Page 20 of 24 pages