The site, spanning over 10 acres in the heart of Napa Valley, California was formerly used for both agricultural and residential purposes. The site is being redeveloped into a condominium community. Terraphase supported the client in preparing the site for residential use by addressing environmental concerns identified during early site assessments.
Scope of Services
Terraphase conducted Phase I and II Environmental Site Assessments (ESAs). Based on the findings, Terraphase performed shallow soil remediation to address lead concentrations exceeding residential screening levels. To support documentation and enhance safety during excavation activities, drones were deplolyed to capture real-time data and monitor site conditions.
In addition to supporting project documentation, Terraphase collected elevation data and an ortho-rectified aerial image for direct Geographic Information System (GIS) integration. Using Pix4D photogrammetry, a digital surface model (DSM) was created to calculate stockpile and excavation volumes, giving the client an accurate measure of soil off-haul quantities.
Notable Accomplishments
- Completed Phase I and II ESAs to support site redevelopment
- Remediated lead-impacted soil to meet residential screening levels
- Used drone technology for real-time site monitoring and enhanced safety
- Collected elevation data and ortho-rectified aerial imagery for GIS integration
- Generated a DSM to accurately calculate stockpile and excavation volumes
