lnapl skimmer Articles

  • Multi-phase extraction system (explosion proof) with LNAPL skimming

    This project has entailed the installation of 29 recovery wells within a large building connected to the remediation system via 1 km of pipework suspended from the ceiling. Recovery wells are installed within subsurface well chambers and short trenches provide ducting for the pipeworks.The remediation system includes Xitech ADJ 1000 smart skimmers for the recovery of floating white spirits (where ...


  • Analytical Solutions for Free-Hydrocarbon Recovery using Skimmer and Dual-Pump Wells

    Accidental release of petroleum hydrocarbons to the subsurface may occur through spills around refineries, leaking pipelines, storage tanks or other sources. If the spill is large, the hydrocarbon liquids may eventually reach a water table and spread laterally in a pancake-like lens. Hydrocarbons that exist as a separate phase are termed light non-aqueous phase liquids (LNAPL). The portion of the ...


    By QED Environmental Systems

  • The Effectiveness of Using Automated Belt Oil Skimmers as a Method of Well Remediation

     ABSTRACT In many sites across the country, groundwater has been contaminated by petroleum products due to leaky underground tanks or past spills. If the leak has gone unnoticed, a considerable amount of product could exist in an aquifer (underground water reservoir), and may be trapped in the surrounding rock. Remediation can take months or years to complete and is frequently labor ...

  • Free-Product Recovery Methods and Issues

    During my 33 years in the environmental field, I have been involved in a lot of sites with free product.  In the 1980’s light non-aqueous phase liquids (LNAPL) such as gasoline were removed by the following methods: Bailing with a hand bailer from a well Pumping with a 2 pump system (depression pump and product pump) Pumping with a total fluids pump and separating ...


    By Enviro-Equipment, Inc.

  • McLaren/Hart Inc. has success cleaning hydraulic oil

    McLaren/Hart, Inc., a full-service environmental engineering company with offices across the United States, was tasked with bringing a cost-effective solution for the automation and expeditious recovery of a heavy gear oil / quench oil from the subsurface of an automotive manufacturing facility. After evaluating several active recovery systems that would meet the free-product recovery objectives ...


    By Abanaki Corporation

  • Integrated solar and wind energy powers oil recovery system

    Recovery of free-product petroleum at the former St. Croix Alumina (SCA) site in Kingshill on St. Croix, VI, is addressing ground-water contamination caused by past releases of fuel and refined petroleum at SCA. The oil recovery system employs wind-driven turbine compressors (WTCs), wind-driven electric generators (WEGs), and photovoltaic (PV) panels to power pneumatic and electric submersible ...

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