soil vapor extraction
Rental System for a Truck Stop Environmental Remediation Project
MAE2 installed a rental Dual Phase Extraction and Groundwater Treatment system to deal with a storage tank leak.
MAE2 recently started up a rental system at an active Interstate Truck Stop facility that had experienced an underground storage tank leak in the past. The consultant had performed a pilot study at the site and developed the required system performance needed to clean the site. Costs for purchasing a new custom built system were compared to buying a refurbished system and to rental of the refurbished system. The flexibility of renting an existing system that fit the site needs was determined to be the best option.
Truck Stop Environmental Remediation Project
MAE2 took an existing system from our fleet and made minor modifications. A traditional Oil Water Separator and Air stripper was replaced with an Oil Water Separator/Air Stripper Combo unit. The system components were completely tested to make the system site ready.
The system is a Dual Phase Extraction and Groundwater Treatment system designed for 10 GPM water flow and 500 ACFM vapor flow at 22” HG. There is a 5-point extraction manifold that pulls both water and vapor from the extraction wells using two 10 HP rotary claw vacuum pumps in parallel.
Rental Environmental System for a Truck Stop
The extracted groundwater is collected in the 120 G Vapor/Liquid separator and then pumped to an Oil Water Separator/Air Stripper combo unit using a progressive cavity transfer pump. Any free fuel that is extracted is collected in the OWS and gravity drains into a product holding tank. The water gravity flows into the Air Stripper chamber. The combo unit saves the need for an additional transfer pump and takes up less floor space. The water is then pumped through a bag filters in parallel and two high pressure fiberglass carbon vessels for final treatment before discharge. The OWS/Air Stripper pump is a centrifugal transfer pump. The system is controlled by a custom PLC control panel that allows for remote access and control using web-based telemetry.
This Environmental Remediation System uses the following components and subsystems
Vapor Liquid Separator Tanks
Vapor Liquid Separator (VLS) or Knockout Tanks are used to remove liquids from airstreams in Soil Vapor Extraction and Dual Phase Extraction systems.
MAE2’s VLS tanks are custom designed based on air flow requirements and come in a range of sizes. The tanks can be constructed from marine grade aluminum or stainless steel. Each tank is custom built to your specification and can have inlets, site tubes, pump out and drains arranged in any orientation you choose. A full 3 CAD drawing will be provided to you for approval prior to construction.
Typical options include 2” clear site tube assembly, Single Point High level switch or multi point pump out switch, vacuum relief valve, vacuum gauges, sample ports, sturdy steel reinforced clean out plug and drain valves.
Options
- Skid Mounted, Custom Water Tight Secondary Containment Enclosures
- Secondary Demister Elements
- MPT, FMPT and Flanged Inlet/Outlet Fittings
- Custom Inlet Filters
- Pump Out Packages
Soil Vapor Extraction Systems
Soil Vapor Extraction (SVE) Systems are designed to induce vacuum and air flow to the subsurface to enhance removal of contaminants in the soil.
SVE Systems typically operate in ranged of 50” water column vacuum up to 15” Hg vacuum. A wide variety of blowers can be used based on the required vacuum and flow. Typical industry standards include regenerative blowers for low vacuum and low to moderate flow rates and positive displacement blowers for higher vacuums and higher flow rates. These types of blowers can be coupled with a variable frequency drive that allows the operator to adjust the rotational speed to match the site specific requirements.
Typical SVE systems include TEFC or XP motor, moisture separator with high level switch, inlet filter and a pre wired, pretested, custom NEMA IV control panel. Also gauges, flow indicators, temperature indicators and transmitters that can be specified per your application.
All components can be fully integrated and pre wired on a steel skid with optional custom sound attenuating enclosure or integrated with new or existing Groundwater Systems.
Options
- Skid mounted, open trailer, enclosed trailer, custom enclosure or custom building
- Centrifugal / progressive cavity automatic pump out with level controls in clear sight tube
- SVE Blower lobe auto oiler
- Filter Vessels
- Liquid Phase and Vapor Phase Carbon Vessels
- Manifolds with flow indicators and gauges