Interstate Truck Stop Vacuum Enhanced Groundwater Pump and Treat System for Diesel Free Product

MAE2was selected to design and build a remediation system for a large truck stop.

The consultant selected MAE2 to build a vacuum enhanced groundwater pump and treat remediation system that incorporated down well groundwater pumps and high vacuum DPE (Dual Phase Extraction) in order to remove the free product diesel.

MAE2 recommended 3 high vacuum parallel rotary claw pumps capable of 765 ACFM at 15” Hg, along with 7 QED pneumatic auto pumps to remove the free product diesel fuel.  The rotary claw vacuum pumps were chosen to allow the system flexibility to operate at a wide range of vacuum levels. The flexibility allows the system to slurp the diesel in the wells to maximize free product recovery. The pneumatic auto pumps operate on demand with a 10 HP reciprocating air compressor providing the air supply needed for pumping. There are custom 6-point air supply and groundwater inlet manifolds for the well pumps.

The Groundwater Treatment system consists of a 15 point custom, marine grade aluminum, inlet manifold a marine grade aluminum, vapor liquid separator, an oil water separator to remove free product, a 270 gallon product tank with high level alarm, 2 bag filters to remove particulates and solids, with valves allowing them to be used in parallel or series, a Poly Stackable Tray Air Stripper to remove dissolved fuel, 2 more bag filters, an Organo Clay media vessel to remove naphthalene, 2 – 500 LB. high pressure steel liquid carbon vessels before discharging to surface water.

A custom modified cargo container was chosen for the project because the size of the components and required space. A cargo container is often exempt from many local building permit requirements

The regulatory agency requires consistent run time for all approved systems. The system provides run time hours, vacuum trends, and water flow totals recorded through the PLC control panel. The cellular connection allows full system control and data through easy-to-use web browser access.  The instant alarm notification and remote control allows the consultant to immediately respond to any changing site conditions and maximize system run time.

This Remediation System uses the following components and subsystems:

  1. Rotary Claw Vacuum Pump
  2. Removable Tray Air Stripper
  3. PLC Control panel
  4. Oil Water Separator
  5. Vapor Liquid Separator
  6. Centrifugal Transfer Pump
  7. Progressive Cavity Transfer Pump
  8. Reciprocating Air Compressor
  9. Down well Pneumatic Pumps
  10. Rotary Claw Compressor
  11. Liquid Phase Carbon