GEO-CENTERS' Surface Towed Ordnance Locator System (STOLS) allows for fast, accurate and versatile geophysical surveys for the location and mapping of unexploded ordnance, storage tanks, trenches and barrels, hazardous waste containers, buried utilities and landfills. The STOLS towed sensor array provides high-productivity environmental and site characterization.

GEO-CENTERS specializes in bringing innovative geophysical investigation technologies to environmental restoration. The patented STOLS system consists of a custom-built light survey vehicle, a towed array of magnetometers, a Differential Global Positioning System (GPS) with 2 cm accuracy, data acquisition computers, and custom data processing and analysis software. The system provides unmatched high-speed, low-cost site characterization. Average survey rates of 30 acres per day are routinely obtained, with documented peak coverage reaching 60 acres per day. A man-portable backpack system is also deployable for smaller, vehicular-inhospitable sites. Sensor data is collected at the rate of 20 times per second, yielding 100,000 data points per acre. Graphical displays and image hardcopy are created in minutes on-site. GIS-compatible output is produced in any desired coordinate system (e.g., lat/lon, UTM, state grid plane).

STOLS users include the U.S. Army Corps of Engineers, the Department of Defense, the Department of Energy, the military services, gas companies, environmental restoration firms, Explosive Ordnance Disposal (EOD) companies, and Architectural Engineering (A&E) houses.

STOLS survey work is available on the GSA schedule for Information Technology Services (schedule number GS-35F-5176H).