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SURVEYDurham Geo
2175 West Park Court |
<-- Back to O-SOX description.EHC-O™ O-Sox™ FAQs1. 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. 7. How long do they last? O-Sox are typically replaced every 3 to 6 months. Various site-specific factors will influence the effective lifetime of the O-Sox cartridge; mainly a) constituent type and concentration, and b) hydrogeological features (groundwater flow rate, Eh, pH, temperature). 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. 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. <-- Back to O-SOX description.
O-SOX™ is
a trademark of Durham Geo-Enterprises, Inc.
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