Mr. Marcus has over 16 years of experience performing, coordinating, managing and/or otherwise participating in these services which include: geotechnical evaluations and design; forensic studies; construction slope and vibration monitoring; materials testing; geophysical surveys; welding and structural inspections; non-destructive testing; environmental studies and remediation; civil and structural engineering design; land surveys; as well as planning and zoning. From a geotechnical design perspective, he has participated in the design recommendations for: shallow and deep foundations; pavements; slabs-on-grade; mass grading; excavations; backfills; liners for lakes and canals; pipelines, soil cement and lime stabilization; above ground tanks; bridges; box culverts; and equipment pads. Techniques used have included drilling with augers, air percussion, roto-sonic, mud-rotary, test pits, hand augers, dynamic cone penetrometers, and geophysical explorations such as seismic refraction, electrical resistivity, ground penetrating radar, and electromagnetic techniques. He has also employed these techniques, as well as manometer floor level surveys, to post-construction geotechnical explorations for distressed buildings, walls, slopes, and others.