Landfill Closure & Cover Bio Based Soil Matrix Amendment
in California

California's complex topography and prolonged desiccation cycles present extreme revegetation challenges. High-gradient cut slopes, particularly those impacted by post-wildfire hydrophobic ash layers, severely resist moisture penetration. When atmospheric river events arrive, these unstable subsoils suffer massive sheet erosion and sediment displacement. A standard agricultural tackifier rapidly degrades under the intense UV exposure and fails completely during the first heavy rain. You require a hydraulic matrix that establishes a deeply rooted mechanical bond without synthetic cross-linking, remaining environmentally safe for sensitive coastal and inland watersheds under strict EPA NPDES monitoring.

Operational Constraints for Landfill Closure

Daily and intermediate landfill covers face severe wind erosion, off-gassing, and strict regulatory leachate controls. Loose soils blow offsite or wash into drainage systems, instantly triggering compliance violations. The objective is to seal the surface without adding excessive weight or moisture to the waste mass. You need a high-viscosity hydraulic hydro-cap that forms a durable crust over the refuse. The polymer must lock in dust and aggressively repel rainwater to prevent it from infiltrating the cell and increasing the site's expensive leachate treatment volume.

Meeting Caltrans Section 21 Specifications

OHRA GreenTack anchors seed and mulch directly to the subsoil, providing the rain-fast shear strength required by Caltrans Section 21. Its microplastic-free botanical hydrocolloid network forms a 3D matrix. It resists high-velocity storm runoff and keeps synthetic toxins out of the watershed.

The matrix prevents "fisheye" lumping inside your hydroseeder pump. This stops pump cavitation and reduces friction head loss. You maximize your tank's spray payload and eliminate constant agitation adjustments on the job site.