With the growing number of successful combined remedy implementations, many misconceptions are being dismissed. One belief was that by combining technologies you increase treatment costs. From a life-cycle perspective, the traditional path of applying different technologies until one works is actually inefficient and expensive; it's more cost-effective to research and implement the right combination of technologies. Another is that certain technologies cannot be combined. For example, it was believed that more aggressive technologies, such as ISTR or ISCO, would have a negative effect on more passive technologies, like ISB. However, research has proven these synergistic technologies can effectively be integrated with careful design considerations.
How technologies are deployed is as important as which tools are used, and a combined remedy should be considered as part of any remedial strategy for today’s complex contaminated sites. Combined remedies should be applied in a flexible, adaptive and attentive manner. Incorporating multiple technologies and strategies can maximize the net environmental benefits of cleanup actions.