The Geotechnical Engineering Bureau (GEB) provides earthwork and foundation engineering services for the design and construction of Departmental projects statewide. When subsurface explorations reveal that a project’s underlying soils are soft or unstable, the GEB may utilize specialized treatment options to allow completion of the desired final product.

Expanded Polystyrene Fill (EPS) is one such option. It is a lightweight fill used to reduce vertical stresses beneath embankments, or to reduce lateral stresses on retaining walls, abutments or foundations.