GdB field crews performed detailed topographic and utility surveys for each site, approximately 1.5 to 2 acres in size.  All existing structures, pavement edges, sidewalks, curbing, ADA improvements, fences, gates, retaining walls, signage, lighting and visable surface hardware for utilities, and any other planimetric features were located. Ground elevations were captured at a maximum 50' interval to produce 1' ground contours.  Building specific information such as finished floor elevations was captured as well.  Utility mark-out and locating was performed according to ASCE Quality Level “B” standards. Utilizing Ground Penetrating Radar (GPR) and Electromagnetic Induction techniques, GdB field technicians designated and located all existing underground utilities (gas, power, water, fiber optic, communications, site lighting, etc.) that supported the NYSTA travel plazas, the adjoining gas stations, and areas needed for future truck fueling stations and electric vehicle charging stations. Closed Caption TV was used to video and document the conditions of existing storm and sanitary sewers exiting the buildings. A small unmanned aircraft system (drone) was used to capture high-definition site photography, georeferenced with site established survey control.