IN-SITU STABILIZATION / SOLIDIFICATION TREATMENT
WASHINGTON COUNTY, PENNSYLVANIA

IN-SITU STABILIZATION / SOLIDIFICATION TREATMENT
WASHINGTON COUNTY, PENNSYLVANIA

IN-SITU STABILIZATION SOLIDIFICATION TREATMENT
WASHINGTON COUNTY, PENNSYLVANIA

Former MGP Site Background

The subject property was the former location of an equipment storage yard owned by a utility company.  Historic operations at the property, including the a manufactured gasoline plant (MGP) which distilled gasoline from liquids produced during natural gas extraction, impacted approximately 12,000 cubic yards of onsite soils and adjacent stream sediments with light non-aqueous phase liquids (LNAPL).  The LNAPL was highly degraded and is similar to lightweight, viscous, lubricating oil/mineral oil.

In-Situ Stabilization/Solidification Treatment

LNAPL in the onsite soils and within the stream bank and bed sediments were remediated by a two-step process: consolidation of the impacted materials followed by stabilization using an In-Situ Stabilization/Solidification (ISS) treatment technology. Accomplishment of these remediation objectives also included the installation of a temporary water treatment system, a stream diversion system and construction of a barrier around the consolidated materials. Deep soil mixing was accomplished using a Delmag RH-32 (Delmag) soil mixing rig and an 8-foot diameter mixing auger.  The mixing auger bit delivered the slurried reagent to the required mixing zone through pressurized nozzles in the mixing bit. 

Special Project Features

Stabilization of soils in-place greatly reduced off-site disposal costs.

 


 

 

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