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Appendix: Screening studies of POPs in fish from the Paz watercourse Table 1.2 QA/QC DATA REPORT for congeners of PCB in biota Compound Procedural Blank PBB 01, ng Method Detection Limit, ng/g Duplicate Difference, %D Spiked Blank Sample SMB 01 Detected, ng Added, ng % Recovery 8[CL2] n.d. 0 . 1 0 - - - 18TCL31 n.d. 0 . 1 0 - - - - 16[CL3] n.d. 0 . 1 0 - - - - 26[CL3] n.d. 0 . 1 0 24 - - - 25[CL3] 0 . 8 8 0 . 1 0 - - - - (31+28)[CL3] n.d. 0 . 1 0 - 0.90 0.83 109 33[CL3] n.d. 0 . 1 0 - - - - 52[CL4] n.d. 0 . 1 0 25 0.80 0.83 96 49[CL4] 4.17 0 . 1 0 25 - - - 47[CL4] n.d. 0 . 1 0 - - - - 44[CL4] n.d. 0 . 1 0 - - - - 37[CL3] n.d. 0 . 1 0 - - - - 41[CL4] n.d. 0 . 1 0 - - - - 74[CL4] n.d. 0 . 1 0 - - - - 70[CL4] n.d. 0 . 1 0 - - - - 66[CL4] n.d. 0 . 1 0 - - - - 95[CL5] 0.41 0 . 1 0 - - - - 60[CL4] n.d. 0 . 1 0 - - - - 99[CL5] 0.29 0 . 1 0 - 0.84 0.83 101 97[CL5] n.d. 0 . 1 0 - - - - 87[CL5] n.d. 0 . 1 0 - - - - 151[CL6] n.d. 0 . 1 0 - - - - 135[CL6] n.d. 0 . 1 0 - 0.81 0.83 97 146[CL6] n.d. 0 . 1 0 - - - - 153[CL6] n.d. 0 . 1 0 - 0.61 0.83 74 105[CL5] 0.57 0 . 1 0 - - - - 141 [CL 6 ] n.d. 0 . 1 0 - - - - 138[CL6] 0.50 0 . 1 0 - 0.63 0.83 76 126[CL5] n.d. 0 . 1 0 - - - - 187[CL7] n.d. 0.15 - 0.62 0.83 75 183[CL7] n.d. 0.15 - - - - 174[CL7] n.d. 0.15 - - - - 177[CL7] n.d. 0.15 - - - - 180[CL7] n.d. 0.15 - 0.63 0.83 76 170[CL7] n.d. 0.15 - 0.76 0.83 91 Akvaplan-niva report APN 514-3365.02 40