Background/Objectives: Soil Remediation Project
A developer near Detroit, MI wanted to redevelop a property with an ideal location with ready access to freeways as a freezer and
High levels of lead contamination were identified over a large portion of the site, presumed to be associated with areas that lead-acid batteries were crushed inside cars and were left to drain.
Furthermore, a large portion of the site was contaminated soil remediation project with lead at levels that were characteristically hazardous (D008).cold storage warehouse. The only problem was the site was historically operated as a junk yard and turned into a soil remediation project.
Some soil was disposed off-site as D008 waste at great expense, but when a significant area required a large undercut for structural reasons, the disposal costs were threatening the viability of the project.
SME reviewed options and found if regulatory approval could be obtained to treat the soil ex-situ with a heavy metal stabilization reagent and then dispose of the soil as non-hazardous waste, they could save approximately
$1.4 million over hazardous waste disposal.
Discovered Hazardous Waste: D008-Pb
$1,825,950 If Disposed as Hazardous Waste
High cost may stop the project
Treatment of Lead-Contaminated Soils” Memorandum EPA 540/2-91/009.
“Solidification/stabilization (s/s) reduces the hazardous potential of contaminated sites by converting the contaminates into their least soluble, mobile or toxic form, thus minimizing their potential migration offsite. Studies
say that modified silicates can be used to immobilize organic contaminates.”
Calcium silicate (Blastox®)
Blastox is proven long-term stable by EPA.Work with the landfill well in advance of preparing to send treated waste, to confirm that the TCLP samples for waste characterization, collected post-treatment, meet their requirements.
If the heavy metal contamination in soil exceeds the Toxicity Characteristic Leaching Procedure (TCLP) limits, stakeholders should be aware that chemical reagents, such as Blastox exists that can be added directly to the soil to render them non-hazardous. This significantly drives down the cost of disposal as hazardous waste transportation and hazardous waste disposal are avoided, allowing for local, non-hazardous waste disposal. This project saved $1.4 MM for the property owner.
Construction after project was finished and cleaned up using Blastox