Replaceable ORC and ORC Advanced Filter Socks for Localized Aerobic Biodegradation


  • Localized treatment approach for low-level, dissolved-phase petroleum hydrocarbons
  • Available oxygen increases biodegradation up to 100 times faster than natural attenuation
  • A single Filter Sock application can support aerobic biodegradation for up to 12 months
  • Replaceable delivery mechanism for controlled-release oxygen in existing wells
  • Minimal site disturbance, no permanent or emplaced aboveground equipment, piping, tanks, power sources
  • Simple and easy application using Filter Sock and canister application
  • Low operation and maintenance cost– lower costs and greater efficiency/reliability than engineered mechanical systems, oxygen emitters and bubblers
  • Wide federal, state and local regulatory understanding and acceptance

How it Works

When Oxygen Release Compound (ORC®) was first commercialized in 1994, it was emplaced into groundwater wells using ORC Filter Socks. Filter socks are permeable, fabric sleeves filled with pure ORC or ORC Advanced® controlled-release oxygen material. Each filter sock is inserted into a colored, Naltex™ Flex-Guard for ease-of-application and maximum durability. When placed into groundwater or hydrated, filter socks produce controlled-release, molecular oxygen for periods of up to 12 months on a single application. The abundant oxygen is readily available to facilitate the proven and cost-effective, enhanced aerobic biodegradation process.

Designed for Localized In-Well Treatment

ORC Filter Sock Placement into Existing WellsORC and ORC Advanced Filter Socks are designed to deliver controlled-release oxygen into a specific well or treatment area with the purpose of creating a very limited and localized aerobic zone where accelerated biodegradation can occur. Upon exhaustion of their oxygen supply (anywhere from 9-12 months) the socks can be removed, disposed of and replaced with a new one.

What’s the Difference between ORC and ORC Advanced Filter Socks?

ORC and ORC Advanced Filter Socks are very similar products, however, many remediation professionals choose to use ORC Advanced Filter Socks due to a higher % by weight oxygen content (17% ORC Advanced vs. 10% ORC). Put simply, you get more oxygen per pound of material with ORC Advanced.

Filter socks are 12″ long and available in 2″, 4″ and 6″ diameters, they are easily laced together using the pre-measured/ pre-cut rope that is supplied with each filter sock order. (Figures 1, 2, 3 and 4). All sizes of Regenesis ORC and ORC Advanced Filter Socks include a factory installed, colored, Naltex™ Flex-Guard (green = 2”, yellow = 4” and orange = 6”). This component is designed to prevent rips or tears in the actual sock material assuring durability during the installation and removal process

For deeper applications, filter socks can be directly inserted into Application-Time-Saver Canisters, then into the well. This can avoid the costly mistake of having the filter socks get lodged in the well.

Target Contaminants:

  • Benzene, Toluene, Ethylbenzene and Xylenes (BTEX)
  • Gasoline Range Organics (GRO) (C6-C10-12)
  • Diesel Range Organics (DRO) (C8-12-C24-26)
  • Oil Range Organics (ORO) (C22-32)
  • Creosote (coal tar)
  • Methyl-Tertiary Butyl Ether (MTBE)
  • Tert-Butyl Alcohol (TBA)
  • cis-1,2 Dichloroethene (DCE)
  • Vinyl chloride (VC)

For a complete listing of treatable contaminants please visit our Range of Treatable Contaminants Page.

Typical Soil and Groundwater Remediation Application Methods:

  • Single or multiple well application into groundwater
  • Reactive biobarriers
  • Use Application Time Saver Canisters for deeper well to avoid lodging of socks and permanent well damage.

Next Steps:

If you currently have a project and need a remediation solution now, visit our Request a Design page.
Have questions or want to explore some ideas? Contact Us to get in touch with a local representative.