Providing Multi-Phase Recovery (MPR), Free Phase Hydrocarbon Recovery, Source Removal,
Vapor Extraction, and Air Sparging for Leaking Underground Storage Tank Sites

Remedial Benefits

MPR events can involve the simultaneous recovery of free phase hydrocarbons, dissolved phase hydrocarbons, and soil vapors.  This can be accomplished with virtually no capitalization costs for system installation or operation and maintenance (O&M).

Full Plume Influence

The full plume, both horizontally and vertically, can be influenced by utilizing multiple extraction points.
EMES Vac Services can install extraction points, monitoring wells and air sparge points.

Performance Monitorings

A detailed MPR report can be provided for each event. The following data is included: equivalent pounds of hydrocarbons removed, length of event, amount of free phase hydrocarbons removed, amount of total liquids removed, off gas concentrations over time, off gas velocity and flow rate, zone of influence levels measured by vacuum and static groundwater levels, free phase hydrocarbon and static groundwater levels prior to and after the conclusion of the event.

Disposal Services

EMES Vac Services can handle disposal of waste or other arrangements can be made.

Fee Structure

Mobilization...……………………….…$50.00/hr
Vac Truck Mileage……………….…...$1.95/mile
Vac Truck & Operator (on-site)……...$125.00/hr
Groundwater Disposal Fee…………..$0.25/gal
Free Product Disposal Fee……….....$0.90/gal
TLV Sniffer Rental………………...….$150.00/day
Static Water Level Meter Rental….…$50.00/day
Interface Probe Rental…………….…$30.00/day
-Free estimates available and discounted rates on multi-event sites.

EXAMPLES OF RESULTS AT LUST SITES

Free Phase Hydrocarbon Recovery

Site 1: This site underwent a combination of free phase hydrocarbon extraction, groundwater extraction and soil vapor extraction.  Free phase hydrocarbon levels from a release of unleaded gasoline measured at 72 inches before MPR events were initiated.  After 44 separate one day events over a period of three years, free phase hydrocarbons have been eliminated and approximately 10,000 gallons of free phase hydrocarbons have been removed.

Dissolved Phase Hydrocarbon Recovery

Site 2: This site underwent a combination of free phase hydrocarbon extraction, groundwater extraction, soil vapor extraction and air sparging.  Free phase hydrocarbon levels from a release of unleaded gasoline measured at 8 inches prior to MPR events.  After 32 events, free phase hydrocarbons were completely eliminated.  The combined air sparging application to the dissolved plume remediated this site to below regulatory action levels.

Area Wide Recovery

Site 3: This site underwent a combination of free phase hydrocarbon extraction, groundwater extraction, soil vapor extraction and air sparging.  This site had a large contaminant plume from a release of unleaded gas with free phase hydrocarbon levels of 12 inches at a diameter of 115 feet prior to MPR events.  Seven extraction points were used to influence the entire free phase hydrocarbon plume.  After 33 events, free phase hydrocarbons were effectively removed.

POINTS TO REMEMBER

•Cost effective alternative for recovery of free phase hydrocarbons, dissolved phase hydrocarbons,    contaminated groundwater and soil vapors
•Use for soil vapor extraction and air sparge pilot studies
•Installation of extraction points, monitoring wells and air sparge points available
•Limited disruption of site activities
•Full performance reports completed after each event
•Flexible remedial application based on available cash flow
•Virtually no capitalization costs for system installation or operation and maintenance (O&M)
•Pay as you go remediation
•System flexibility based on site characteristics now and in the future
•Free estimates, and discounted rates are available on multi-event sites

MPR Event at a LUST Site

EMES Vac Services’ Dominator® Vacuum Loader provides Multi- Phase Recovery (MPR). MPR application is an economical and efficient choice for the extraction of impacted vapors, free phase hydrocarbons, and dissolved phase hydrocarbons.  MPR can be used in the remediation of soil and groundwater at Leaking Underground Storage Tank (LUST) sites.  During extraction, a maximum flow rate of 880 CFM and 27 in. Hg of vacuum can be created yielding up to a 150 foot radius or more zone of influence.  Air Sparging can also be employed to remove dissolved phase hydrocarbons with very little capital costs.  This would include the installation of sparge points that can be used simultaneously with MPR to strip hydrocarbons from the dissolved phase.