Manufactured Gas Plant and Creosote Remediation Case Studies

Description: Former MGP, Hartford, CT
Contaminant Treated: TPH, SVOCs and VOCs
Process:
• Treatment used VeruTEK’s Coelution Technologies™, Surfactant-enhanced In Situ Chemical Oxidation (S-ISCO¨) and Surfactant-enhanced Ex Situ Chemical
Oxidation (S-ESCO¨).
• Treatment consisted of VeruSOL¨, a biodegradable and food-grade surfactant mixture; sodium persulfate; peroxide; and sodium hydroxide.
Results:
• 1,200 tons of contaminated soil were treated by S-ESCO™ aboveground;
• 1,900 tons of contaminated soil were treated by S-ISCO¨ in the subsurface;
• TPH concentrations in ex situ soils were reduced by as much as 95%, from 4,183 ppm to 182 ppm; and
• Contaminant concentrations were reduced in situ and ex situ to levels below industrial/commercial criteria established by the State of Connecticut redevelopers of the Site.

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Description: Large-Scale Remediation Field Test Subsurface Coal Tar at a Former Manufactured Gas Plant Site.
Contaminant Treated: MGP Site contaminated with TPH, BTEX, SVOCs and VOCs
Geology/Contaminant Substrate: Sandy soil contaminated with coal tar, gas, and some groundwater contamination above a layer of clay.
Process: Pilot Test using S-ISCO® with Fe-EDTA activated persulfate and VeruSOL®
Location:  New York Area
Results Summary: VeruTEK® was engaged by environmental consultants interested in a permanent solution to a 125 year old manufactured gas plant related contamination at a Site owned by a major utility. The site had been treated with three ISCO treatments using persulfate but these treatments failed because of the insoluble nature of the contamination and limited life of the oxidant in soil. VeruTEK® designed a S-ISCO® treatment solution using Fe-EDTA activated persulfate paired with VeruSOL® surfactant.  VeruTEK® carefully measured and documented the path of treatment chemicals and contaminant levels during treatment. Complete destruction of 4,000 kg of MPG related soil and groundwater contamination took place in approximately 11 days even though the treatment chemical was designed to treat just 900kg.

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