Located across the street from Golden Gate Park, 730 Stanyan is an affordable housing development that will provide 150+ units for low- to moderate-income families and families that have experienced homelessness. The project includes construction of an eight-story building with sustainable features, as well as public art honoring the neighborhood’s history. Langan provided site due diligence, performed Phase I and Phase II Environmental Site Assessments (ESAs), and prepared a Site Mitigation Plan (SMP) based on the results of the ESAs. Our SMP helped mitigate potential risks to the environment and protect on-site workers, nearby residents, and pedestrians from potential exposure to substances encountered during soil excavation and grading activities. We also conducted a geotechnical investigation and seismic hazard analysis to evaluate subsurface conditions and develop recommendations for the geotechnical aspects of the project.