Sandimirov S. Pollution of the Sediments of the Paz River basin / In State of the environment in the Norwegian, Finnish and Russian border area. The Finnish Environment. Finland, Jyvaskyla: Kopijyva Oy. 2007, №6, 98p.

Table 4. Background concentrations o f heavy metals and As (^g/g, dry weight) in sediment cores o f the Russian investigated lakes Lake Layers, Cu Ni Zn Co Cd Pb As Hg cm ^g/g ^g/g ^g/g ^g/g ^g/g ^g/g ^g/g ^g/g Kochejaur-North 18 - 19 18 22 74 13.5 0.21 1.8 1.26 0.012 Kochejaur-Middle 16 - 17 16 19 85 7.7 0.21 5.1 1.13 0.017 Kochejaur-South 19 - 20 16 20 69 8.8 0.16 3.4 - - Virtuovoshjaur 16 - 17 18 19 83 11.6 0.12 5.5 1.21 0.003 Alla-Akkajarvi 26 - 27 12 12 103 9.0 0.09 3.3 1.86 0.028 Kuetsjarvi-Golfstream 15 - 16 47 39 106 20.8 0.16 8.4 7.95 0.035 Kuetsjarvi-Salmijarvi 20 - 21 52 66 127 30.7 0.18 9.2 11.92 0.007 Kuetsjarvi-Whit Stone 22 - 23 40 32 173 15.9 0.10 6.6 2.62 0.049 Kaskamajarvi 19 - 20 57 33 115 23.1 0.09 2.1 4.83 0.057 Porojarvi 22 - 23 68 42 161 11.8 0.20 2.9 13.7 0.058 Shuonijaur 14 - 15 14 13 47 4.3 0.06 0.8 0.74 0.019 Keudsherjaur 15 - 16 9 15 93 8.0 0.06 1.4 1.16 0.032 LN-2 17 - 18 53 214 121 26.2 0.40 1.0 4.29 0.111 LN-3 30 - 31 27 13 54 7.0 0.11 0.7 1.16 0.045 LN-4 14 - 15 21 27 66 10.7 0.14 1.0 1.62 0.026 Zapoljarny 17 - 18 28 72 119 39.0 0.31 1.3 12.40 0.039 Trifonojarvi 9 - 10 54 58 140 40.3 0.26 3.9 7.17 0.025 Kirikovanjarvi 20 - 21 32 26 88 8.8 0.14 1.6 0.85 0.040 Pikku-Heynjajarvi 14 - 15 29 20 137 17.4 0.25 1.6 5.06 0.061 Peschanoe 13 - 14 53 61 61 11.4 0.12 1.5 5.99 0.045 Average Min Max Standard deviation 33.2 9 68 18 41.2 12 214 45 101.1 47 173 35 16.3 4.3 40 10.5 0.17 0.06 0.40 0.09 3.2 0.7 9.2 2.5 4.57 0.74 13.7 4.25 0.037 0.003 0.111 0.025 Average* 36.2 34.9 112.9 19.8 <0.50 3.4 - 0.042 Average** 37 36 95 13.4 0.94 3.7 - 0.042 * - average background values of heavy metals in sediment cores of the lakes of the Kola Peninsula in 1991 - 1992 (Dauvalter, 1994a) ** - average background values of heavy metals in sediment cores of the Russian lakes of the Paz River Basin in 1991 - 1992 (Dauvalter, 1994b) 16