Soil gas investigation by detection tube

Pollution of groundwater and soil caused by volatile organic chloride such as trichloroethylene (TCE) is normally detected by measurement of the groundwater, but a pollution source and a pollution range could not be specified only by the measurement of the groundwater. A soil gas investigation by a detection tube method detects components contained in soil gas of a surface layer by utilizing high volatility such as TCE, and surface pollution and range are estimated. Here, a soil gas investigation is performed and pollution source points are estimated by considering ground water science and geochemical examination in tetrachloroethylene (PCE).

PCE in ground water in a polluted district is measured and its change is observed. Furthermore, ion components in the ground water are measured, hexadiagram and trilinear diagrams are made and determination of quality of the groundwater is carried out.

From the gas investigation result concentration contours are made on the points on a map made by the previous hearing investigation.