View of Proposed New Transbay Transit Center (Courtesy of TJPA)
In 2007, Treadwell & Rollo was selected by Transbay Joint Powers Authority (TJPA) to conduct As-Needed Environmental Consulting Services for the construction of the new Transbay Transit Center in downtown San Francisco. The Center will serve 10 Bay Area transportation systems: AC Transit, BART, Caltrain, Golden Gate Transit, Greyhound, Muni, SamTrans, WestCAT Lynx, Amtrak and the future High Speed Rail from San Francisco to Los Angeles/Anaheim.
Prior to building the new Transbay Transit Center, a new temporary terminal facility was built at Block 3739 (Site). The Site is approximately 275 feet by 550 feet in plan dimension and is bound by Main Street to the northeast, Howard Street to the northwest, Beale Street to the southwest, and Folsom Street to the southeast.
Peter J. Cusack, REA, is the Project Manager, and Dorinda C. Shipman, PG, CHG, is the Principal leading our environmental services on these projects. As part of our contract with TJPA, we performed a Phase I Environmental Site Assessment; Phase II Environmental Site Characterization, Site Mitigation Plan (SMP) and oversight during the construction activities. Based on the analytical results from the site characterization work, some of the fill material contained elevated total and soluble lead levels at concentrations exceeding Federal and State of California hazardous waste criteria.
Temporary Terminal (Courtesy TJPA)
We also performed a Limited Environmental Site Characterization and prepared a SMP and assisted with specifications for the demolishing of the current Transbay Terminal building and the construction of the Transbay Transit Center. The new Transbay Transit Center development will centralize the regional transportation network, and consist of below grade levels for the trains, above grade levels for buses and a park on the roof.
The property is bayward of the original historic San Francisco shoreline and subject to the requirements of the City’s Article 22A (Maher) Ordinance. Article 22A states that construction projects which are bayward of the historic 1852 high tide line and disturb more than 50 cubic yards of soil, require assessing the site history and subsurface soil quality.
