Wednesday, August 21, 2019

Landfill Containment Cell Expansion

Project Location:

West Riverside County, CA

Converse Responsibilities:

Quality Control Services
Geotechnical Observation and Testing

El Sobante Landfill

The project consisted of 1,700,000 cubic yards of excavation and installation of a liner system. The expansion included 18 acres and was comprised of compacted clay liner, 40-mil HDPE double-side textured geomembrane, geosynthetic clay liner (GCL), 1’ gravel drainage layer, filter geotextile and 60-mil double-side textured HDPE geomembrane, with a 2 foot operations layer. The sidewall liner system consisted of the prepared sub-grade, 40-mil double side textured HDPE geomembrane, GCL and 60-mil double side textured HDPE geomembrane, geocomposite leachate collection layer and a 2-foot operations layer for the first 20-feet above base.

Converse provided CQA Services at the landfill on an 18-acre cell expansion. This included observation and inspection of earthwork activities, monitoring installation of underdrains, GCL and geomembrane line and certification of leachate collection systems and operations. We prepared a final CQA certification report to verify that the project was constructed in accordance with the project plans and specifications.