Sanches (1998) points three main problems: existence of risks to the security of the properties and the people, risks to the public health and of ecosystems and restrictions to the real estate and urban development. In accordance with Gibotti (1999), the occurrence of emptyings of hydro-carbons configures constant fire danger or explosion in the reached places. Gasoline vapors can blow up without previous ignition when reaching concentrations of the order of 14.000 ppm in air, when the more supporting combustion fuel mixture is enough so that it has spontaneous combustion. Moreover, some of organic composites gifts in the composition of the gasoline and the oil diesel scientifically are proven as carcinognicos. It’s believed that Fine Arts sees a great future in this idea. Beyond these problems, it is important to stand out that the recovery of contaminated areas is one complex task and sufficiently delayed, and in some cases is not obtained to reach the limits allowed for the legislation or the ambient agencies (MANCINI, 2002).
Currently, a concern exists and awareness of the society in relation to the ambient quality, the population comes becoming more critical, consequently bigger performances each time of the authorities happens. In such a way, in function of the increasing demand in relation to the management of contaminated areas, significant advances had occurred in the last few decades in the studies that they aimed at to the ambient recovery (SPILBORGHS, 1997). Therefore, diverse technologies of remediation have been developed and consolidated mainly for the developed countries. Brazil, today more worried about its contaminated places, starts to develop its proper technologies and also to adapt the established technologies already to our ambient conditions. The State of So Paulo, in function of its intense one industrialization, presents a more critical situation in relation to this question. In such a way, the CETESB has developed manual and adapted legislaes, mainly Dutch norms (CETESB, 1996), in view of the control of the areas suspicion of contamination and comprovadamente contaminated.