Projects

The Plant Development

• Client:   Westrust
• Location:  San Jose, California
• Project Managers: Sigrida Reinis and Michael Chendorain
• Principal-in-Charge: Jeffrey F. Ludlow
• Regulation:  San Francisco Regional Water Quality Control Board

Treadwell & Rollo is providing environmental consulting services for this 35-acre commercial redevelopment, a former General Electric manufacturing facility.  Our engineers are preparing drawings and specifications for mitigation of indoor vapor intrusion for 28 buildings. 

GE and Treadwell & Rollo developed a tiered VMS plan that includes a membrane and layer of crushed rock beneath the building slab, with horizontal perforated pipes to collect vapors and vent them through a riser pipe.  The systems use natural convection, eliminating mechanical blowers; all components were installed outside public areas, with sampling ports on the roof to minimize tenant disruption. Treadwell & Rollo is conducting monthly performance monitoring of the VMS.

We are also providing general environmental consulting services, including soil management plans, coordination of development activities with GE consultants and soil, gas and groundwater cleanup systems. Treadwell & Rollo is also supplying construction observation related to the vapor intrusion mitigation systems.