Vapor Intrusion Mitigation System – Palo Alto, CA

Terra-Petra’s Environmental Engineering Division has partnered with a significant environmental consulting firm in the Bay Area to prepare a comprehensive Vapor Intrusion Mitigation System (VIMS) for a new development located in Palo Alto, CA.

Terra-Petra designed the passive mitigation system with the ability to convert it to an active system in the future if deemed necessary. The VIMS System was reviewed and approved by the Department of Toxic Substances Control (DTSC).

Having completed the VIMS design we have moved on to the construction administration phase which includes submittal review and RFI responses, as well as the QA/QC inspections. We are currently on-site overseeing the smoke testing of the subslab membrane system.

For more on this project visit the City of Palo Alto Website

Terra-Petra awarded contract to perform methane and water intrusion inspections for Northern California project

Terra-Petra was recently awarded the contract to perform inspections at the Maple Street Correctional Facility site in Redwood City, California. The Northern California site requires excavation below the water table and is located within a region impacted by naturally occurring methane gas. As such, the future building is susceptible to the impacts of methane gas and water intrusion and requires a dual methane barrier/waterproofing system. Gergen Construction is in the process of installing the system which will consist of a membrane and passive venting system to adequately protect the building.

The inspections will be administered through Terra-Petra’s San Francisco office. Terra-Petra’s Deputy Methane Barrier Inspectors (DMBI) come prepared with diverse certifications and extensive knowledge of prevalent systems, making Terra-Petra a versatile choice for any methane/water impacted construction project. The Maple Street Correctional Facility site is no exception. For this project, Terra-Petra’s certified Hydroshield, Coreflex and Liquid Boot inspectors led to the selection of Terra-Petra as the best team to get the job done.The joint effort and long-standing relationship between Terra-Petra and Gergen Construction will ensure an efficient and reliable system to provide the project owners with an environmentally safe building.