Enviropro pioneered soil gas investigations in Southern California in the early 1980s. We use soil gas sampling for preliminary mapping of buried volatile and semi-volatile organic compounds because it is a time and money savings technology. This sampling method generates immediate onsite field data on organic vapor concentrations ,enabling us to identify the problem more quickly than can be done by using the conventional drilling approach. This technique allows for a faster definition of existing subsurface contamination, requiring less laboratory analysis and field time for our environmental professionals. The net result is faster solutions at a reduced cost.