Made available in DSpace on 2015-03-13T17:08:26Z (GMT). No. of bitstreams: 1 AnaCPSS.pdf: 3110880 bytes, checksum: d0d14455b4c6001b051f6fc76010789b (MD5) Previous issue date: 2009-06-30 / This work is the application of geophysical methods, using the Ground Penetrating Radar (GPR), with the objective of survey in a subsurface plume of contamination caused by a disabled gas station. The gas station is located on the B?zios beach in southern coast of the state to Rio Grande do Norte in an Area of Environmental Protection called Bonfim-Guara?ra. The interest to develop this work was the presence of contaminants (hydrocarbons) in a well located on the desktop, previously used for the abstraction of groundwater for residents living near the site. Were raised 15 geophysical survey lines totaling 775,48 lifting and installed 4 piezometer, to confirm the contamination and prepare a pluviometric map that helped in indicating the direction of local groundwater flow, thus showing the direction of movement of the probably plume of contamination. From the processing of the GPR lines was possible to identify two likely phases of contamination according to the classification proposed by Azambuja et al 2000, which are called phase absorbed and dissolved phase / A presente disserta??o corresponde a aplica??o da metodologia geof?sica, utilizando para isto o Ground Penetrating Radar (GPR), com o objetivo de obter um imageamento em subsuperficie de uma pluma de contamina??o ocasionada por um posto de revenda de combust?vel que se encontra desativado. Este posto esta localizado na praia de B?zios litoral sul do estado do Rio Grande do Norte dentro de uma ?rea de Prote??o Ambiental denominada de Bonfim-Guara?ra. Esse estudo foi realizado a partir da descoberta da contamina??o por hidrocarboneto obtido atrav?s de sondagem realizada para capta??o de ?gua subterr?nea por moradores que residem pr?ximo ao local. Foram levantadas 15 linhas de sondagem geof?sica totalizando 775,48 metros de levantamento e instalados 4 piez?metros, para confirma??o da contamina??o e elabora??o de um mapa potencim?trico que auxiliou na indica??o do sentido do fluxo subterr?neo local, mostrando assim o sentido de movimenta??o da pluma de contamina??o. A partir do processamento das linhas de GPR foi poss?vel identificar duas prov?veis fases de contamina??o de acordo com a classifica??o proposta por Azambuja et al 2000, as quais s?o denominadas de fase absorvida e fase dissolvida

Made available in DSpace on 2014-12-17T14:08:48Z (GMT). No. of bitstreams: 1 HerculesLAS_DISSERT.pdf: 3304337 bytes, checksum: 041717a4cfd116130802eab3678923c7 (MD5) Previous issue date: 2011-01-31 / Among the potentially polluting economic activities that compromise the quality of groundwater are the gas stations. The city of Natal has about 120 gas stations, of which only has an environmental license for operation. Discontinuities in the offices were notified by the Public Ministry of Rio Grande do Norte to carry out the environmental adaptations, among which is the investigation of environmental liabilities. The preliminary and confirmatory stages of this investigation consisted in the evaluation of soil gas surveys with two confirmatory chemical analysis of BTEX, PAH and TPH. To get a good evaluation and interpretation of results obtained in the field, it became necessary three-dimensional representation of them. We used a CAD software to graph the equipment installed in a retail service station fuel in Natal, as well as the plumes of contamination by volatile organic compounds. The tool was concluded that contamination is not located in the current system of underground storage of fuel development, but reflects the historical past in which tanks were removed not tight gasoline and diesel / Dentre as atividades econ?micas potencialmente poluidoras que comprometem a qualidade das ?guas subterr?neas est?o os Postos Revendedores de Combust?veis. A cidade do Natal possui cerca de 120 postos de combust?veis, dos quais, apenas um possui licen?a ambiental de opera??o. Os postos em desconformidade foram notificados pelo Minist?rio P?blico do Rio Grande do Norte para realizarem as adequa??es ambientais, dentre as quais est? a investiga??o de passivo ambiental. As fases preliminar e confirmat?ria desta investiga??o consistiram na avalia??o de gases do solo com duas sondagens confirmat?rias para an?lises qu?micas de BTEX, HPA e TPH. Para obter-se uma boa avalia??o e interpreta??o dos resultados obtidos no campo, se fez necess?rio a representa??o tridimensional dos mesmos. Utilizou-se um software CAD para representar graficamente os equipamentos instalados em um posto revendedor de combust?vel em Natal/RN, assim como as plumas de contamina??o por compostos org?nicos vol?teis. A partir desta ferramenta foi poss?vel concluir que a contamina??o n?o est? localizada no atual Sistema de Armazenamento Subterr?neo de Combust?vel do empreendimento, mas reflete o hist?rico passado em que foram removidos tanques n?o estanques de gasolina e diesel