Residuals Use for Topsoil Fabrication

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Comox Valley Regional District

The Comox Valley Regional District (CVRD) issued a request for proposals for engineering services for the Comox Valley Waste Management Centre (Comox Valley Landfill) to prepare an updated closure plan, and complete Phase 1 detailed design.  The updated closure plan was to include strategies to address topsoil requirements and vegetation establishment, including the consideration of using fabricated soil amendments and organic residuals to augment topsoil resources for closure activities. 

For this project SYLVIS worked as sub-consultants to EBA, the successful engineering proponents of the updated closure plan and completion of Phase 1 detailed design.  SYLVIS’s scope of work included reviewing options for topsoil fabrication, assessing the availability of locally-generated organic residuals, determining the suitability of the residuals for use in landfill closure and vegetation establishment, identifying and summarizing considerations for residuals use and outlining pertinent regulatory requirements.

In providing recommendations for residuals use, SYLVIS completed a site assessment, collected samples of residual materials present at the landfill, worked closely with EBA and CVRD staff, prepared preliminary cost estimates for purchase and/or on-site fabrication of topsoil and provided recommendations for soil depth, placement and vegetation.  In addition, SYLVIS worked with EBA to author text for the updated closure plan to facilitate residuals use in landfill closure.

Working within a large, multidisciplinary team, SYLVIS also ensured that project partners and clients remained knowledgeable on the status of the project by completing written biweekly updates for EBA, authoring monthly progress reports for the CVRD and participating in monthly teleconferences with the project team and CVRD. 

By facilitating the use of residuals in landfill closure, SYLVIS assisted the CVRD in not only meeting economic objectives but also in demonstrating sustainability and environmental protection through the beneficial use of residuals.