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  • About EarthSystems
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Equipment Sales and Rental

EarthSystems can design and build remediation equipment to meet your site specific needs or it can build the equipment using your design. The system can be installed in a road-worthy trailer, mounted on a skid or built in a permanent on-site shed. Among the most reliable technologies employed by EarthSystems are Soil Vapor Extraction (SVE), Total Phase Extraction (TPE) and Vacuum Enhanced Groundwater Extraction (VEGE) systems. The VEGE system is used when groundwater recovery is needed from a relatively deep well and can be combined with a SVE system.

SOIL VAPOR EXTRACTION
Soil vacuum extraction (SVE) is an effective method used to remove vapor phase volatile organic compounds from impacted soils. SVE systems typically use blowers to produce a vacuum on extraction wells, which are screened above the water table. The applied vacuum induces migration of contaminant-laden vapor through the pore space and bedrock fractures. This vapor movement allows adsorbed contaminants to volatilize into the vapor stream for recovery. Additionally, aerobic bioremediation is enhanced with SVE technology, which elevates oxygen concentrations in the subsurface.

Typically, a regenerative blower is used to pull vapors from a recovery well to a moisture separator tank and then a particle filter. From there, it is pulled by vacuum through granulated activated carbon and discharged.

EarthSystems utilizes the AMETEK ROTRON® line of regenerative blowers which are designed for environmental/chemical processing with explosion proof motors. These oil-free products provide you with vacuums up to 8 in Hg and feature compact construction, low acoustical noise, high reliability, and long lives without scheduled maintenance requirements.

TOTAL PHASE EXTRACTION
TPE involves the simultaneous subsurface removal of free product, vapor and groundwater recovered via a single drop tube. A high-vacuum liquid ring pump (LRP) is utilized to produce a high vacuum on the drop tube, which removes the groundwater to the point of drop tube depth. Vapor is then removed from the well and through the well casing screened volume. Groundwater also enters through the screen from the surrounding subsurface and is entrained with the vapor as both are extracted. As the water table is drawn down by groundwater extraction, the previously saturated areas become exposed, and can then be remediated by the vapor extraction. The vacuum that is applied to the subsurface removes the hydrocarbon vapors from the unsaturated pore spaces and fracture zones while also drawing in oxygen-laden clean air from non-impacted areas. Volatilization of hydrocarbons is increased with the vapor movement and bioremediation of hydrocarbons is also increased with the influx of additional oxygen. To see a drawing of the basic TPE system click here.

Liquid Ring Pumps
EarthSystems TPE systems utilize oil-sealed LRPs VMax series manufactured by Dekker Vacuum Technologies. The use of liquid ring technology can provide for a maximum vacuum level of 28 in. Hg with minimal maintenance.

The oil-sealed pumps can be coupled with 5 to 40 horsepower (Hp) electric motors, which will be explosion proof due to the location of the pumps and the contaminant constituents in the extracted groundwater and vapor.

VACUUM ENHANCED GROUNDWATER EXTRACTION
Vapor Enhanced Groundwater Extraction (VEGE), like TPE, also combines groundwater recovery with SVE technology; however, groundwater is removed via an installed pneumatic down-well pump. The pneumatic pump is required because the Liquid Ring Pump does not produce enough vacuum to extract the groundwater from the deep wells (>25 feet). Soil vapors are recovered via a specified vacuum pump or blower that can provide vacuum levels in the low (8 in. Hg) to high (28 in. Hg) range. The vacuum unit produces a vacuum on the well, at which time soil vapor is removed from the well and through the well casing screened interval. Groundwater also enters through the well screened volume from the surrounding subsurface and is removed to the level of the groundwater pump inlet. Following extraction, contaminated groundwater is routed through an equalization tank and sediment filters. Water is then transferred through a treatment system typically consisting of granulated activated carbon before it is discharged. To see a drawing of the typical VEGE system click here.