The Project.
For the Metropolitan Transit System which operates buses and trolleys in San Diego County, a new $50.9 million maintenance facility was funded. The expansion and reconfiguration will increase the facility capacity to 240 buses, which will include new South Bay Bus Rapid Transit (BRT) buses.
Client:
Whiting Turner | Metropolitan Transit System
Location:
San Diego County, CA
Services:
- Environmental
- Geotechnical
- Geotechnical Testing
- Special Inspection
- Materials Testing
Project Fact:
Keeping buses fueled and ready to roll.
The Leighton Solution.
Leighton performed geotechnical engineering during design and construction, environmental hazardous waste assessments, and special inspection/material testing.
Geotechnical investigation of the site included subsurface explorations and analyses of pavement areas with heavy bus loading, and new improvements that in include a high-bay bus maintenance building, a two-story administration building, and Bus Washing facility. Previous geotechnical explorations and collected data by others were used in our initial evaluation of the site, which ultimately resulted in cost savings.
Following site demolition, petroleum-impacted soils were encountered across the site, which required an immediate hazardous waste assessment and remediation to keep the project on schedule. Leighton’s environmental engineering staff quickly mobilized under our geotechnical and special inspection service contract to assess the contamination and developed remediation alternatives. Approximately 800 cubic yards of petroleum contaminated soil was profiled and transported off site for disposal at a permitted facility. Upon excavation of the contaminated soil, confirmation soil sampling was conducted with the use of an on-site mobile analytical laboratory prior to import of clean fill for backfill.
As the geotechnical engineer of record for the design build project, Leighton provided QC services including geotechnical observation/testing and the required special inspection and materials testing services for the construction of the new buildings, bus wash facility and other improvements. Special inspection and materials testing services included field and laboratory testing of structural concrete, steel reinforcement and welding inspection. In addition, Leighton performed off site fabrication welding inspection, which included NDT and UT testing.
