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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 />EPA Method 537.1 by EPA 537.1 <br />Analysis Date: 07/02/2020Prep Batch: 1258786 Analytical Batch: 1259138 <br />DUP_202006300494 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid ND ug/L (0-30)ND <br />LCS3 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.047 0.0427 ug/L 91 (70-130) <br />LCS4 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.047 0.0503 ug/L 107 (70-130)1630 <br />MBLK 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid <0.000667 ug/L <br />MRL_CHK 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.0019 0.00201 ug/L 107 (50-150) <br />MS1_202006300488 11-chloroeicosafluoro-3-oxaundecane-sulfonic acid 0.024 0.0221 ug/L 94 (70-130)ND <br />DUP_202006300494 13C2-PFDA (S)109 %109 (70-130) <br />LCS3 13C2-PFDA (S)100 102 %102 (70-130) <br />LCS4 13C2-PFDA (S)100 103 %103 (70-130) <br />MBLK 13C2-PFDA (S)103 %103 (70-130) <br />MRL_CHK 13C2-PFDA (S)100 101 %101 (70-130) <br />MS1_202006300488 13C2-PFDA (S)100 101 %101 (70-130) <br />DUP_202006300494 13C2-PFHxA (S)108 %108 (70-130) <br />LCS3 13C2-PFHxA (S)100 101 %101 (70-130) <br />LCS4 13C2-PFHxA (S)100 102 %102 (70-130) <br />MBLK 13C2-PFHxA (S)105 %105 (70-130) <br />MRL_CHK 13C2-PFHxA (S)100 103 %103 (70-130) <br />MS1_202006300488 13C2-PFHxA (S)100 102 %102 (70-130) <br />DUP_202006300494 13C2-PFOA– IS#1 (I)91.6 %92 (50-150) <br />LCS3 13C2-PFOA– IS#1 (I)100 108 %108 (50-150) <br />LCS4 13C2-PFOA– IS#1 (I)100 99.0 %99 (50-150) <br />MBLK 13C2-PFOA– IS#1 (I)101 %101 (50-150) <br />MRL_CHK 13C2-PFOA– IS#1 (I)100 100 %100 (50-150) <br />MS1_202006300488 13C2-PFOA– IS#1 (I)100 109 %109 (50-150) <br />DUP_202006300494 13C3-HFPO-DA (S)102 %102 (70-130) <br />LCS3 13C3-HFPO-DA (S)100 99.8 %100 (70-130) <br />LCS4 13C3-HFPO-DA (S)100 97.8 %98 (70-130) <br />MBLK 13C3-HFPO-DA (S)100 %100 (70-130) <br />MRL_CHK 13C3-HFPO-DA (S)100 97.9 %98 (70-130) <br />MS1_202006300488 13C3-HFPO-DA (S)100 99.5 %100 (70-130) <br />DUP_202006300494 13C4-PFOS– IS#2 (I)87.2 %87 (50-150) <br />LCS3 13C4-PFOS– IS#2 (I)100 103 %103 (50-150) <br />LCS4 13C4-PFOS– IS#2 (I)100 93.1 %93 (50-150) <br />MBLK 13C4-PFOS– IS#2 (I)94.0 %94 (50-150) <br />MRL_CHK 13C4-PFOS– IS#2 (I)100 93.5 %93 (50-150) <br />QC Report - Page 1 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 16 of 24 pages