In order to clarify the aspects of initial stage of groundwater pollution due to organochlorines in the subsurface, some experiments on the movement of contaminants near the groundwater surface and solution process into groundwater were conducted. As one result, the oscillation of water level is assumed to support the solubility and the durability of contamination of groundwater. As the second subject of this work, the monitoring in a model region was pursued for the purpose of explaining the distribution of contamination. The method of soil gas analysis was then used to investigate the state of groundwater pollution.
Appendix C -- Soil gas analysis of vadose zone monitoring system installation report for McClellan AFB