CEA: Corporate Environmental Advisors: Remediation: MPVE

Services & Solutions

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Multi-phase Vacuum Extraction

Multi-phase Vacuum Extraction (MPVE) is an effective method of soil and groundwater remediation at sites contaminated by releases of petroleum products and CVOC's. MPVE enhances contaminant removal by means of an applied vacuum either with or without a separate down well pumping system. The applied vacuum is supplied by a pump capable of producing large negative pressures (up to 27 inches of mercury). A Liquid Ring Vacuum Pump (LRVP) is typically the pump of choice for this type of application, however other pumps/blowers can also be used.

Numerous aspects of MPVE systems contribute to the effectiveness of its use in site remediation. Most importantly, MPVE systems allow for the recovery of free phase, adsorbed phase, dissolved phase and vapor phase contaminants. Also, hydraulic control of the contaminant plume is provided thus aiding in the prevention of contaminant migration.

MPVE systems may be easily modified to address varying subsurface conditions. At locations where a low to moderate permeability, shallow aquifer is present, contaminant recovery may be performed by a "vacuum only" approach. However, at locations where a moderate to high permeability aquifer or low permeability aquifer with relatively deep groundwater is present, vacuum in conjunction with submersible pumps is often used. The flexibility and comprehensive approach of MPVE make it an effective, cost efficient method for remediation of sites contaminated by petroleum hydrocarbons and CVOC's.