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

CMC Lite Yard- Former Pesticide Production – Minnesota

Successfully treated with only 2% dosage of EnviroBlend chemistry.

Crescent City – Florida

Remediation action required for lead contamination in soil. Project was conducted by Aerostar. EnviroBlend 20/80 coarse was used to stabilize lead to TCLP standards. 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 [...]

Former Shooting Range – North Carolina

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