Matrix assisted with the cleanup and redevelopment of this large property burdened with a complex mix of environmental contaminants including military munitions and explosives of concern (MEC). 

Seven historical legacy landfills containing municipal solid wastes and industrial wastes required regulatory closure.  These landfills, which were unlined and often immediately adjacent to water bodies, ranged in size from 7 to 25+ acres. Regulatory closure standards required Matrix to design an engineered soil cap or cover system that complied with federal and state regulations, minimized future direct exposure to wastes, controlled/managed surface water drainage and erosion, and minimized leaching of contaminants to groundwater.  As part of the closure design, Matrix looked at future, different-than-typical uses for the engineered soil cap/cover system surfaces that could be compatible with the client’s long-term redevelopment plans. 

A revenue-generating solution

Matrix developed a closure design allowing for the engineered soil cap/cover system on the largest of the landfills to be utilized as a tactical driving course.  The design includes a paved roadway course incorporating straight-aways, flat sections, uphill and downhill sections, uphill and downhill turns, a constant radius turn, increasing and decreasing radius turns, a flat turn, negative and positive camber turns, S-turns, and two turns that can be constantly covered with water allowing for instruction of over and under-steer skid control.  The design also incorporates features allowing for instruction of off-road recovery techniques for regaining vehicle control.  The advantage of this design is that the surface of the landfill can be used to generate a steady revenue stream from direct use of the course by law enforcement agencies and private security firm personnel. 

Matrix was also granted a variance allowing for mature trees to remain on the landfill to enhance the future recreational reuse of the capped area. The Matrix team’s ability to “re-think” the typical approach to capping landfills is an example of the firm’s ability to promote sustainable economic development through the conversion of underutilized, contaminated properties to uses that meet stakeholder objectives for environmental stewardship and regulatory compliance.