Organic constituents amendable to anaerobic biodegradation processes include:
• Chlorinated Solvents
• Energetics
• Pesticides / Herbicides
A-SOX™ is available in two nominal sizes: 2 x 36 in and 4 x 36 in.
EHC™ 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 significantly stimulates catabolic activity of indigenous microflora further accelerating the rate of contaminant removal.
EHC not only eliminates contaminants quickly —but also guarantees appreciable cost savings over other oxygen release products on the market. EHC’s proprietary technology is field proven and available today.
Benefits of EHC®-A:
• Significant cost savings due to ISCR approaches that promote biotic, abiotic, thermodynamic and chemical degradation mechanisms.
• Readily biodegradable H donor.
• Estimated longevity of 3 to 6 months.
• Unique mode of action does not require use of speciality microorganisms.
A-SOX™ is a delivery mechanism consisting of a fabric sleeve (or sock) filled with EHC™ 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.
EHC® A-SOX™ FAQs
1. What are the main application scenarios for A-SOX?
The A-SOX systems are most conducive to physically challenging situations where a readily biodegradable carbon source and reduced iron are needed to induce in-situ chemical reductions (ISCR) of targeted compounds. For example, A-SOX can be used in deep well settings, PRBs that require routine amendment, and strategic placement into “problem” well locations.
2. What contaminants are amenable to A-SOX treatment?
Chlorinated solvents, chlorinated pesticides, and energetics are the primary targets.
3. Why should I use the A-SOX technology?
It’s a better product and the superior design and ease of application will immediately translate into reduced field time and frustration, and therefore an overall reduced project cost.
4. Is it easy to switch over to the A-SOX technology?
Yes. EHC-A has been accepted by numerous state regulatory authorities, and has been employed throughout the USA and Europe.
5. How long do they last?
A-SOX generally have longevity of approximately 250 days, but replacement on a longer or shorter schedule can be optimised based on monitoring results. Various site-specific factors will influence the effective lifetime of the A-SOX cartridge, mainly i) constituent type and concentration, and ii) hydrogeological features (groundwater flow rate, Eh, pH, temperature).
6. Do I need to install new wells?
No. The A-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.
7. Where are they primarily used?
The EHC A-SOX can be used in existing or newly-installed wells, either in natural or forced gradient flow systems. For example, existing hotspot wells can be treated, or deep, dilute, or fractured system plumes can be treated by A-SOX placed within the capture zone of a groundwater recirculation well or other forced gradient system.
Ordering Information:
TR-419 2-in x 3-ft A-SOX (pail with 5 socks*) 13 lb
TR-411 2-in Canister (stainless steel, reusable) 1.5 lb
TR-418 4-in x 3-ft A-SOX (pail with 3 socks*) 28 lb
TR-413 4-in Canister (stainless steel, reusable) 3 lb
Accessories:
TR-416 Nylon-covered stainless-steel suspension cable with swaged cable loop at one end (sold per ft)
TR-414 2-in Well Cap with Cable Restraint 0.6 lb
TR-415 4-in Well Cap with Cable Restraint 1.2 lb
602528 Pail Opener 0.5 lb
Notes:
• A-SOX is non-returnable and non-refundable.
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