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Appendix: Screening studies of POPs in fish from the Paz watercourse Table 1.4 QA/QC DATA REPORT for p lana r and mono-orthosubstituted congeners of PCB in biota Compound Procedural Blank PBB 02, ng Method Detection Limit, ng/g Duplicate Difference, %D Spiked Blank Sample SMB 02 Detected, ng Added, ng % Recovery #CL4 81 1 . 1 0 0 . 0 1 3.28 3.69 89 #CL4 77 n.d. 0 . 0 1 3.10 3.69 84 #CL5 123 n.d. 0.04 3.54 3.69 96 #CL5 118 n.d. 0 . 2 0 3.62 3.69 98 #CL5 114 n.d. 0 . 0 1 3.58 3.69 97 #CL5 105 0.57 0 . 1 0 3.76 3.69 102 #CL5 126 n.d. 0 . 0 1 3.51 3.69 95 #CL 6 167 n.d. 0 . 0 1 2.84 3.69 77 #CL 6 156 n.d. 0.03 2.95 3.69 80 #CL 6 157 n.d. 0 . 0 1 3.10 3.69 84 #CL 6 169 n.d. 0 . 0 1 3.54 3.69 96 #CL7 180 n.d. 0.05 3.65 3.69 99 #CL7 170 n.d. 0 . 0 2 2.92 3.69 79 #CL7 189 n.d. 0 . 0 1 3.80 3.69 103 Surrogate Internal Standards, % Recovery #CL4 81 C13 44 0.005 3.35 5.00 67 #CL4 77 C13 43 0.005 3.00 5.00 60 #CL5 123 C13 66 0.005 3.95 5.00 79 #CL5 118 C13 82 0.005 5.35 5.00 107 #CL5 114 C13 77 0.005 4.80 5.00 96 #CL5 105 C13 87 0.005 5.65 5.00 113 #CL5 126 C13 66 0.005 4.30 5.00 86 #CL6167 C13 106 0.005 6.60 5.00 132 #CL6156 C13 127 0.005 6.80 5.00 136 #CL6157 C13 108 0.005 6.15 5.00 123 #CL6169 C13 99 0.005 5.15 5.00 103 #CL7180 C13 95 0.005 5.15 5.00 103 #CL7 170 C13 99 0.005 4.95 5.00 99 #CL7 189 C13 114 0.005 5.80 5.00 116 Akvaplan-niva report APN 514-3365.02 43