EX-SITU BLENDING-LEAD SHOOTING RANGE -
NORTHEAST ALABAMA
Contaminants:
Lead
Treatment:
Ex-Situ Soil Blending
Site Status:
Closed
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Site is a former shooting range and historic “dump” with earthen berm containing lead contamination from spent cartridges, approx. 100
cubic yards failed TCLP (total lead >1,000 ppm).
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Eden conducted a treatability study to identified best fit chemistry for reduction/stabilization (ISS). Optimal treatment conditions determined using a 5% calcium polysulfide solution followed by 7% Portland cement powder.
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Excavation and power screening performed using a trommel screener to remove rocks/debris. Soil targeted for blending (approx. 100 cubic yards) were directed into lined roll-offs. Remainder of
the soils were transported to a Subtitle D landfill
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Soil blending was performed using calcium polysulfide/Portland cement. After 24hrsof partial curing, TCLP lead samples were collected and were non-detect, allowing Subtitle D disposal.
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Challenges: In the middle of the job, a 3 to 4’ wide deep hole appeared in front of the bank. Hole opened up to a wider passageway (possible mineshaft)–city archaeologists evaluated.
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Required extra staging prior to loading soils–beware of old dump sites!!
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A total of 1,245 tons of soil were transported off-site for non-hazardous waste disposal at a significant cost savings (total job cost <$170,000)
Ready to close your site? Our professionals are well acquainted with the "pit falls" of soil and groundwater remediation. Here at Eden, we understand that combined remedial solutions are often required.
We are committed to offering not only front end assistance but follow-up services for the life of your project to reach site closure.