The Site Characterization and Analysis Penetrometer System (SCAPS) platform consists of a 20-ton truck equipped with vertical hydraulic rams that are used to force a cone penetrometer into the ground at a speed of 2 cm/sec to depths of approximately 50 m in nominally consolidated fine-grained soils when using a 100-m umbilical cable (25 m when using 50-m umbilical cables). The SCAPS program is currently conducting field verification investigations on state-of-the-art penetrometer mounted sensor and sampler systems for the real-time in situ detection of petroleum products, explosive compounds, volatile organic compounds (VOC), solvents, and gamma emitting radionuclides.