Two wells were installed with this indoor drilling rig, next to a former floor drain and sump system, where a previous tenant blended chemicals to make cleaning solutions. Some volatile organic compounds (VOCs) contaminated the subsurface. One well was completed in the silts above a clay confining layer, and one well was installed in the sands below the confining layer.
A soil vapor extraction (SVE) pilot test was performed to remove the VOCs from the sandy subsurface soils. The extraction well is inside the garage door, and a fan mounted outside withdraws the vapors from the subsurface. Site closure was granted after several quarters of system operations and groundwater monitoring.
