The Armour Road site was used for railroad herbicide manufacturing and blending from 1948 to 1986. Powdered arsenic (95% pure), monosodium arsenic, and various other chemicals were part of the herbicide production. Subsurface testing showed significant arsenic contamination in over 40,000 tons of soil. The EnviroBlend® team formulated a site-specific treatment chemistry for the contaminated soil that was effective at low doses, saving the owner considerable off-site disposal costs.
Soil Arsenic Concentration, mg/kg EnviroBlend(R) Dosage, weight %
Approximately 11,000 cubic yards of soil were initially treated at dosages ranging from 0.75 to 2.3 percent by weight. Table 1 provides a summary of full-scale treatability data on the initial soil stockpiles.
|Table 1. Initial Full-scale Treatability Data Summary
||0.75% – 2.30%
||1,700 – 10,600
||1.7 – 63.6
||0.28 – 2.90
These case studies are examples of the extensive work EnviroBlend has completed across the United States. For more information on our project experience please contact us.