In-Situ Stabilization Via
Shallow Soil Mixing (Ssm)
Of Organic Contaminated Soils And Sludges
Bailey Waste Superfund Site
Bridge City, Texas

Geo-Con was selected out of a field of six contractors by McLaren Hart to perform the in-situ stabilization pilot demonstration at the Bailey Waste Disposal Superfund Site. The selection was based on a matrix evaluation to determine the most qualified and experienced candidate to perform the work. The weighed factors that defined the matrix were experience, equipment, techniques, personnel and cost.

The site was an inactive industrial waste facility that primarily received industrial organic materials. The contaminants of concern included: acetone, benzene, chlorobenzene, ethylbenzene, naphthalene and toluene. Residential waste was also disposed of at the site. The site was proposed in 1984 for the NPL. The final remedial design was issued in 1991.

The in-situ stabilization involved varying mixtures of cement and bentonite. The goal of the study was to demonstrate and document that a minimum unconfined compressive strength of 25 psi and maximum permeability of 1x10^-6 cm/sec could be achieved. The result of pilot demonstration confirmed the project requirements could be met and determined appropriate modifications to techniques and sampling protocols.

• Start: 8/29/94
• Completion: 9/26/94