Portland Cement and CKD are examples of lime-based treatment technologies that can occasionally pass an initial Toxicity Characteristic Leaching Procedure (TCLP) test. However, actual long term treatment is at risk.

Once treated waste is exposed to the environment, a highly alkaline product such as Portland Cement will continue to drive up the pH, often too quickly and irregularly. Because many metals will leach at low and high pHs (on a bell curve), a sudden increase in pH can cause metals to leach over time.  Therefore, pH maintenance is imperative to long-term stability.

Higher dosage and leaching rates with Portland Cement

The use of lime-based technologies can fall significantly short compared with the EnviroBlend chemistry when it comes to dosage rates. Click here for data on the effectiveness of the EnviroBlend chemistry resulting in the very low leaching in both the TCLP (acid) and Synthetic Precipitation Leaching Procedure (SPLP) or “Acid Rain” tests. Both the lime and Portland Cement treatments are able to sometimes meet the TCLP test at high dosages but they actually increase the amount of lead leaching in the SPLP test.

Case Studies

Columbia Development Corporation – South Carolina

Remediated over 500 tons of lead-impacted soil at a potential brownfield redevelopment site. Rendered the soil nonhazardous without additional treatment. Met the client’s 2-week time frame, completing the project prior to implementation of UTS standards. Performed the project at one-half the cost of the alternative – disposing in a hazardous waste landfill. Interested in more [...]

Old Industrial Facility – Georgia

Lead-contaminated soil was treated at this old industrial site at 6% dosage of EnviroBlend. Interested in more stories like this? Fill out the form below for a free download. Notice: JavaScript is required for this content. These case studies are examples of the extensive work EnviroBlend has completed across the United States. For more information [...]

Former Shooting Range – North Carolina

Stabilized 2,500 tons of lead contaminated soil from firing range with EnviroBlend 90/10 Coarse. Soil had to meet SPLP and MEP testing requirements. Interested in more stories like this? Fill out the form below for a free download. Notice: JavaScript is required for this content. These case studies are examples of the extensive work EnviroBlend [...]