ENTACT performed remediation activities at several blocks and lots at this site, representing a larger-area brownfield redevelopment project for future residences.

Multiple industrial operations impacted the soil with the following contaminants of concern: polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), polychlorinated biphenyls (PCBs), hexavalent chromium, chromium ore process residue (COPR), extractable petroleum hydrocarbon (EPH), pesticides, various metals and lead.

Scope of work included design, procurement, and installation of a 1,600-linear-foot, 40-foot-deep permanent vertical hydraulic control system; dewatering, water treatment, and discharge to a nearby creek; excavation of overburden and impacted soil from delineated areas; and off-site transportation and disposal of excavated impacted soil and debris.

We performed in-situ stabilization of 3,000 cubic yards of hazardous lead soils, loaded and transported recycled concrete aggregate (RCA), and blended it with approved excavated overburden for backfill.

ENTACT backfilled the excavated areas to cap subgrade elevations with RCA/overburden-blended fill, compacted it to achieve 95% proctor density, and imported certified clean fill to install 10.6 acres of various soil and capillary break caps.

Over 70,000 cubic yards of material were managed throughout the project.