Table 2.

Concentration of PCBs in sediment samples from CB (stations S1 to S12) and GMSM (stations 13 to S15) (ng/g, dw) during the rainy and dry seasons

Stations	PCB52	PCB101	PCB138	PCB153	PCB180	ΣPCBs
CB
S1	< 0.009	< 0.009	< 0.003	< 0.020	< 0.005	< LOD
S2	< 0.009	0.12 (< 0.009)	0.25 (0.10)	< 0.020	0.22 (< 0.005)	0.59 (0.10)
S3	< 0.009	< 0.009	0.14 (0.11)	< 0.020	< 0.005	0.14 (0.11)
S4	< 0.009	< 0.009	0.11 (0.16)	< 0.020	< 0.005	0.11 (0.16)
S5	< 0.009	< 0.009	0.11 (0.11)	< 0.020	< 0.005	0.11 (0.11)
S6	< 0.009	< 0.009	< 0.003	< 0.020	< 0.005	< LOD
S7	< 0.009	0.18 (< 0.009)	0.81 (0.36)	0.90 (0.61)	0.91 (0.49)	2.81 (1.46)
S8	< 0.009	0.17 (< 0.009)	0.66 (0.38)	< 0.020 (0.61)	0.73 (0.41)	1.55 (1.40)
S9	< 0.009	< 0.009	0.15 (0.26)	< 0.020	< 0.005 (0.25)	0.15 (0.51)
S10	< 0.009	0.28 (0.19)	0.77 (0.64)	0.66 (< 0.020)	0.42 (0.41)	2.13 (1.24)
S11	0.39 (0.65)	1.21 (1.50)	5.42 (6.72)	4.29 (4.59)	3.90 (5.13)	15.22 (18.59)
S12	0.10 (0.10)	0.21 (0.20)	1.01 (0.52)	0.83 (< 0.020)	0.56 (0.35)	2.70 (1.16)
GMSM
S13	< 0.009	< 0.009	< 0.003	< 0.020	< 0.005	< LOD
S14	< 0.009	< 0.009	< 0.003	< 0.020	< 0.005	< LOD
S15	< 0.009	< 0.009	< 0.003	< 0.020	< 0.005	< LOD

PCB values in sediments corresponding to the dry season are shown in parentheses