Table 3. Contamination levels in clam tissue and samples. The model is not very sensitive to the small differences in pollutants among leased areas, but it recognizes that PCB concentrations in the top sediment around industrial areas are at least an order of magnitude higher than in the rest of the lagoon.

Chemical Field data: leased areas Model output: leased areas Model output:
illegal fishing grounds
PCB 105 1.45 × 10-7 3.29 × 10-7 2.76 × 10-6
PCB 118 5.43 × 10-7 3.56 × 10-6 3.65 × 10-5
PCB 180 4.49 × 10-7 4.06 × 10-7 7.19 × 10-6