• Oxygen releasing compound in a sock for aerobic bioremediation in ground water wells.
  • Easiest deployment of dissolved oxygen.
  • Stimulation of aerobic biodegradation of groundwater contaminants through controlled release oxygen and nutrient delivery using EHC-O. This is not an aggresive treatment but, rather, an enhancement to natural attenuation. Ideal for sites where there are residual or thin layer of contaminants.
  • The radius of influence depends on the hydrogeology of the site but is still predictably small (in the order of 10 ft radially, 20-50 ft downgradient).
Key Benefits

• Easiest deployment of dissolved oxygen.
• Enhances Natural Attenuation
• > 50% Less Expensive
• Easy and quick delivery system for groundwater wells
• Long Lasting

Contaminants Treated

• Petroleum hydrocarbons
• PAHs
• Other non-halogenated organic compounds

O-SOX Sleeves and stainless steel canister in 2" and 4" sizes. Socks are stored and shipped in pails.


EHC-O is an integrated source of slow-release oxygen combined with nutrients and a pH buffering agent to provide the ideal conditions for rapid bioremediation of organic and inorganic soil, sediment and groundwater contaminants. For organic constituents, EHC-O significantly stimulates catabolic activity of indigenous microflora further accelerating the rate of contaminant removal. EHC-O not only eliminates contaminants quickly —but also guarantees appreciable cost savings over other oxygenrelease products on the market. EHC-O’s proprietary technology is field proven and available today.

O-SOX is a delivery mechanism consisting of a fabric sleeve (or sock) filled with EHC-O and a stainless steel canister. For ease of use in groundwater wells, the socks are lowered in the well inside reusable stainless steel canisters. The number of canisters that can be hooked together is limited and governed by well screen length, weight, and the fact that they all need to be submerged.

O-SOX is available in two nominal sizes: 2 x 36 in and 4 x 36 in.

2" O-SOX being lowered in a well.

Take a sock from the pail and remove plastic sleeve.

Insert sock into canister.

If desired, attach an optional canister and insert a sock.

Adjust the length of cable required.

Lower canister in the well.

Cap rests on top of casing.

Ordering Information

2-in x 3-ft O-SOX (pail with 5 socks*)
2-in Canister (stainless steel, reusable)
4-in x 3-ft O-SOX (pail with 3 socks*)
4-in Canister (stainless steel, reusable)
2-in Well Cap with Cable Restraint
4-in Well Cap with Cable Restraint
Pail Opener
1/16″-dia. Nylon-covered stainless-steel suspension cable with swaged cable loop at one end in the following lengths:
25 ft
50 ft
75 ft
100 ft
125 ft
150 ft

Note: O-SOX ships by motor freight only. For overseas shipment, please contact us.
O-SOX is non-returnable, non-refundable.

Model Description
602528 Pail Opener


1. What are the main differences between O-Sox and comparable market alternatives?

EHC-O O-Sox contain a well-buffered source of controlled release oxygen plus inorganic nutrients (mainly nitrogen) that can accelerate the biodegradation of various organic compounds and enhance certain natural attenuation processes. In addition, the O-Sox technology is a practical stainless steel canister and sleeve system which greatly simplifies and hastens installation, removal and replacement.

2. Do I need microbial inoculants?

In most cases, the naturally occurring (indigenous) microorganisms are well adapted to the organic constituents of interest and inoculants are not required.

3. What contaminants are amenable to O-Sox treatment?

The rate and extent of removal of all organic compounds that are biodegraded under aerobic conditions are usually enhanced via the addition of oxygen and inorganic nutrients. Petroleum-based aromatic (e.g., benzene, toluene, xylene, phenol) and aliphatic hydrocarbon mixtures (e.g., gasoline, heating oil, Diesel fuel, jet fuel, kerosene) are primarily targets; lightly chlorinated ethenes (vinyl chloride), MTBE, dioxane, pentachlorophenol, and many other compounds are also potentially amenable to O-Sox treatment

4. How much do they cost?

O-Sox cost about 25% less than market alternatives.

5. Why should I use the O-Sox technology?

It’s a better product. And the superior design and ease of application will immediately translate into greatly reduced field time and frustration = reduced project cost.

6. Is it easy to switch over to the O-Sox technology?

Yes. EHC-O has been accepted by many state regulatory authorities and it has been employed throughout the USA and Europe. For example, see: EHC Acceptance Letter - Innovative Technologies Florida Department of Environmental Protection.

8. Do I need to install new wells?

No. The O-Sox technology is designed to fit into standard 2-inch and 4-inch diameter groundwater monitoring wells. The canisters have a nominal outside diameter of 1.75 inches for the 2-inch size and 3.5-inches for the 4-inch size.

9. What is the oxygen delivery rate?

The rated delivery is at least 15 lb of oxygen per 100 lb of EHC-O, after 200 days.

10. Does EHC-O or O-Sox have a shelf life?

Yes, about 3 to 4 months in dry storage at room temperature.

10. Does EHC-O or O-Sox have a shelf life?

Yes, about 3 to 4 months in dry storage at room temperature.

11. How many O-Sox can be used per well?

All O-Sox must be placed below the groundwater table and they should be within the screened interval. The wet weight of each 2-inch and 4-inch O-Sox unit (3-ft long canister and sleeve) is about 5 and 16 lbs, respectively. We therefore recommend a maximum linkage of five 2-inch diameter systems (15 ft screened interval; 25 lbs) or three 4-inch diameter systems (9 ft screened interval; 48 lbs). Up to three sets of linked O-Sox units can be used for wells with longer screen lengths.