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Appendix 1: Screening studies of POPs in bottom sediments from the P az watercourse Cont. table 1.1 QA /QC DATA R E PO R T fo r congeners of PCB in sediment Compound Procedural Blank PBS 02, ng Method Detection Limit, ng/g Certified Reference M a terials EC-5, n g/g Detected Reference Value #156 [CL6] n.d. 0.05 - - #201 [CL8] n.d. 0.05 3.5 5.7 ± 2.7 #157 [CL5] n.d. 0.05 - - #180 [CL7] n.d. 0.05 26.4 22.3 ± 7.6 #191 [CL7] n.d. 0.02 - - #170 [CL7] n.d. 0.02 10.0 10.1 ± 1.6 #199 [CL8] n.d. 0.05 - - #189 [CL7] n.d. 0.02 - - #208 [CL9] n.d. 0.05 - - #194 [CL8] n.d. 0.02 9.6 8.1 ± 10.1 #205 [CL9] n.d. 0.05 - - #206 [CL9] n.d. 0.05 2.1 2.2 ± 0.9 #209 [CL10] n.d. 0.10 1.6 1.20 ± 0.9 Surrogate Internal Standards, % Recovery Detected, n g Added , ng % Recovery #28 [CL3] C13 88 0.02 12.0 15.6 77 #52 [CL4] C13 82 0.02 12.2 15.6 78 #101 [CL5] C13 83 0.02 14.7 15.6 94 #153 [CL6] C13 104 0.02 17.0 15.6 109 #138 [CL6] C13 93 0.02 16.8 15.6 108 #180 [CL7] C13 88 0.02 16.4 15.6 105 Rapport APN- 514.3665.01 38