RENOVA was contracted to provide in-situ soil solidification/stabilization (ISS) at a brownfield site in Brooklyn, NY. RENOVA seamlessly integrated with the project team, including the client, their environmental engineer, and NYSDEC. The site was located in a densely-populated urban environment. There were no complaints from residents and no exceedances detected by the perimeter air monitoring program for the duration of the project. Prior to mobilization, RENOVA prepared a comprehensive health and safety plan (HASP), ISS work plan, and performed a GSSI SIR ground penetrating radar system survey. Once on-site, RENOVA’s automated batch plant and 40-ton silo were staged using a 60-ton crane. RENOVA then removed the existing asphalt and five feet of non-hazardous and hazardous soil and sent all waste streams for disposal. RENOVA implemented ISS on 3,000 tons of contaminated soil via bucket mixing utilizing a 40-ton excavator. The excavator also mitigated the additional expense of contending with buried debris. The mix design was 3.0% Blastox 125, via supersacks, and 5.0% Type I/II Portland Cement, mixed and delivered via batch plant.

In addition to performing soil treatment activities, RENOVA continuously obtained representative samples of the treated material for quality control purposes to confirm that each mixed cell achieved a reliably continuous mix in accordance with Interstate Technology & Regulatory Council (ITRC) standards. Samples were analyzed for the following parameters: unconfined compressive strength (UCS), hydraulic conductivity (HC), and synthetic precipitation leaching procedure (SPLP). RENOVA surveyed for a final topographic survey of the ISS mixed area. RENOVA then emplaced a 6″ layer of ¾” stone atop a non-woven geotextile fabric, providing a capillary break. The area was then backfilled with clean stone, compacted in lifts. RENOVA completed work safely with no recordable incidents, ahead of schedule, and on budget.