• NorthStar Group Services, Inc. Seven Penn Plaza 370 7th Avenue, Suite 1803 New York, NY 10001

Soil Excavation and In-Situ Stabilization

NorthStar can meet the needs of any soil management project.

  • Excavation and removal of hazardous or contaminated materials from soil, sediment, and, groundwater
  • Bench Studies and Pilot Projects to evaluate and develop mix designs that will minimize the cost of additives to stabilize/fixate hazardous constituents including Heavy Metals, PCBS and other wastes
  • Shallow Soil Mixing (SSM) with depths to 30’ for In Situ Stabilization (ISS) using Excavators
  • Deep Soil Mixing (DSM) with depths to 100’ for In Situ Stabilization (ISS) using Auger Platforms

NorthStar has the most experience with MGP (Manufactured Gas Plant) site remediation in the US.

50+ MGP projects for different clients using ISS & Excavation.


Featured Projects and Achievements

verified-checkbox-symbol_318-64495 Largest MGP (Manufactured Gas Plant) In-situ Stabilization project in history

Progress Energy - Sanford Mgp

  • Stabilization to depths of 6-30’ using Auger-mixing
  • Pilot study to determine optimal target mix by area
  • 2% Portland Cement and 6% Granulated Blast Furnace Slag
  • Unconfined compressive strength of 50 psi at 28 days


verified-checkbox-symbol_318-64495 First MGP In-situ Stabilization (Soil Mixing) project in the State of New Jersey


  • Stabilization to depths of 30’ using Excavator-mixing
  • Treatability tests to establish reagent mix design
  • Worked with regulators to alter permeability standards
  • 3% Portland Cement and 9% Granulated Blast Furnace Slag
  • Unconfined compressive strength of 50 psi at 28 days
  • Minimum hydraulic conductivity of 1 x 10-6 cm/sec


 verified-checkbox-symbol_318-64495Removal of MGP impacted river sediments to a constructed on site ISS treatment area

Duke Kinston MGP 1

  • Conducted treatability study to determine ISS mix design
  • Installation of cofferdam
  • Excavation of secondary source areas and backfill with clean fill
  • In Situ Soil Stabilization via Excavator Mixing of 63,000 CY
  • Construct evapotranspiration cap over treated area