COMM22, developed by BRIDGE Housing, is an award-winning mixed-use, mixed-income, transit-oriented development located at Commercial and 22nd Streets in San Diego. SCS’s environmental remediation of the property to ensure human health and the environment were protected as cost-effectively as possible enabled the four-phase development project, supporting our client’s and the community’s social and business goals.
The completed COMM22 housing development is a transformational project that has brought tangible benefits to its residents and the entire community. What was once an abandoned, contaminated property is now a thriving cornerstone for the whole neighborhood and a model for transit-oriented infill development and affordable housing with a noticeable increase in the quality of life and a palpable pride of ownership.
SCS designed and implemented a phased investigation and design program at the site to address the change in use from a former maintenance facility for buses to a multi-family residential with below-grade parking. Issues included leaking Underground Storage Tanks (USTs) and fill soils containing various toxic metals, including lead. Groundwater and soil were delineated, and SCS successfully closed the UST case with the Department of Environmental Health, allowing the start of site redevelopment.
Additional pre-construction characterization and design were performed before site development. This pre-characterization and three-dimension data analysis resulted in time and budget savings. Careful soil profiling allowed for the direct loading of impacted soil and resulted in a reclassification of soil types and reduced hazardous waste disposal costs. SCS used its regulatory knowledge to characterize segregated soils as “inert” and reduced soil disposal costs by approximately $500,000. Under our CA contractor’s license, SCS conducted site mass grading and monitoring and segregation of excavated fill soils and waste profiling for their proper off-site transport. Our careful soil management also resulted in the prevention of 151.52 tons of CO2 emissions.
SCS Engineers’ role in supporting the environmental conditions at the site spans over ten years, including environmental assessments, waste characterization, mass grading, and design and implementation of a successful remediation program; thus delivering housing that supports both the social and business goals of the development team and the community.
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