TN&A is experienced with preparing plan and specification packages, along with engineering cost estimates. TN&A has prepared and reviewed conceptual and final remedial designs incorpo­rating both traditional and innovative remedial technologies.

For a high-profile Superfund site in California, TN&A developed detailed remedial pre-designs for alternatives evaluated in the feasibility study, including in situ chemical oxidation, enhanced in situ bioremediation, electrical resistance heating with SVE, vacuum enhanced groundwater extraction, ultraviolet oxidation, activated carbon adsorption, and flameless thermal oxidation. This site is a former chemical blending and distribution facility that will be redeveloped into a public park. These designs were combined in various alternatives to reflect the range evaluated for three major contaminated zones. A steel frame treatment compound building was designed to house all of the above ground vapor and water treatment systems to blend into the recreational park setting.