Sandimirov S. Screening studies of POP levels in bottom sediments from selected lakes in the Paz watercourse / In State of the environment in the Norwegian, Finnish and Russian border area. The Finnish Environment. Finland, Jyvaskyla: Kopijyva Oy. 2007, №6.

Screening studies of PO P levels in bottom sediments from selected lakes in the Paz watercourse Table 7. Polybrominated diphenyl ethers (PBDEs) (pg/g dry weight) in bottom sediments. PBDEs Station number and sediment slice 1 2 3 6 7 4 5 8a 8b 9a 9b Kuets­ jarvi Kuets­ jarvi Kuets­ jarvi Skrukke- bukta Bj0rn- vatn Ruske- bukta Tj^re- bukta Lake Inari Lake Inari Lake Stuora­ javri Lake Stuora­ javri 0-1 cm 0-1cm 0-1 cm 0-1 cm 0-1 cm 0-1 cm 0-1 cm 0-1 cm 15-18cm 0-1 cm 22-23cm PBDE # 28 1.98 0.98 n.d. 1.2 1.5 n.a. n.a. 3.05 0.41 0.79 n.d. PBDE # 47 52.0 28.9 9.47 33 31 8.03 6.00 56.1 5.52 3.05 10.1 PBDE # 99 42.3 35.6 31.2 27 29 1.14 0.70 45 3.05 7.23 1.99 PBDE # 100 8.17 6.2 1.65 5.8 6.1 1.04 2.00 12.3 0.67 1.88 0.37 PBDE # 153 n.d. n.d. 9.18 n.d. n.d. 1.33 2.00 7.79 0.8 1.65 0.58 PBDE # 154 n.d. n.d. n.d. n.d. n.d. n.a. n.a. 9.08 0.77 1.56 0.48 PBDE # 183 n.d. n.d. 14.4 n.d. n.d. n.a. n.a. 13.4 1.88 3.46 1.67 Sum of PBDE 104 71.7 65.9 67 68 11.5 10.7 147 13.1 19.6 15.2 n.d.=not detected; n.a.=not analysed. Figure 9. Polybrominated diphenyl ethers(p g /g dry weight) in bottom sediments. Numbers above bars are values o f total PBDE concentrations (LPBDE). The highest PBDE levels were found in sediment samples from Lake Inari (147 pg/g dw) (station 8) and from Lake Kuetsjarvi (104 pg/g dw) (station 1). However, the PBDE pattern varied between areas (Figure 10 ) indicating different sources for the PBDE contamination. In general, PBDEs #47 and 99 were the most abundant; their total contribution to EPBDE varied between 53% (station 9) and 90% (station 1). There are not many studies on PBDE levels in surface sediments from lakes in Norway. However, there are some studies from Ellasj 0 en on B j 0 rn 0 ya, Svalbard in the Norwegian Arctic Rapport APN- 514.3665.01 21