It is worth to note that the concentrations of SK3 for both contaminants are higher than all the concentrations of all the sources. The concentration ratios of SK3 to the maximum sources concentration (Zk,SK3,/Ck,SR_max) for both contaminants are larger than or equal to 1 (290/250 > 1 and 300/300 = 1). This means that all the individual sink-to-source concentration ratios are all larger than 1. SK3 is not limited by any contaminants, and all the sources can be allocated to SK3. If the sources are enough, then SK3 can be covered without resorting to the freshwater.
The full design methodology has been shown as presented in Scenario 2 and is nearly identical, According to the heuristic presented in Section 2.4/3, SK3 should be the last sink that is fulfilled as it should be located Above the Pinch. In this case, the design methodology should first start with contaminant cascade ‘B’ as the total flowrates of sinks (SK2+SK4) in contaminant cascade ’B’ exceed the flowrate of the sink (SK1) in cascade ’A’. After determining the allocation of sources to SK2, SK4 and SK1, the remaining sources can be sent to SK3. Figures 13 show the CC plot for this scenario.