An imbedded Internet sensor system for protecting real property from the consequences of subterranean chemical pollution. The system provides real time monitoring of the first occurrence of contaminants in the subsurface of a property. An onsite processor controls a local network of sensors and a communication...http://www.google.de/patents/US6405135?utm_source=gb-gplus-sharePatent US6405135 - System for remote detection and notification of subterranean pollutants
