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Facility ID: 59107MNTNSEXXON
Facility Name and Address: MONTANA SULPHUR & CHEMICAL CO 627 EXXONMOBIL RD BILLINGS, MT 59101 Parent Company: Industry: Other Basic Inorganic Chemical Manufacturing (325180) Chemical: Carbonyl sulfide Reports: View TRI Facility profile report for this facility View TRI Form R submissions by this facility |
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Production Related Waste Management for Selected Chemical
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Pollution Prevention Activities for Selected Chemical
Reporting Year | Section 8.10: Newly Implemented Source Reduction Activity | Section 8.10: Methods to Identify Activity | Section 8.11: Optional Pollution Prevention Information* |
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2021 | Other Environmental Practices - The facility operates a sulfur recovery plant, SuperClaus process and catalytic incinerator process which together serve to convert de minimis levels of this compound to elemental sulfur product and to oxidize remaining trace amounts of the compoundto sulfur dioxide at high efficiency. The facility also operates a flare gas treatment unit which may have the effect of reducing trace amounts of this compound reaching the flare, if present in the feed gases. This trace material is formed as an impurityduring processing of hydrogen sulfide to produce sulfur. This would be true of any thermal sulfur recovery operation. It does not appear to exceed the de minimis 1% level in the mixtures formed, and having formed, it is also reacted in the processes to formproduct sulfur and sulfur dioxide. While the de minimis exemption exempts "mixtures" containing less than 1% of this material from consideration, conflicting guidance suggests that EPA wants impurities in some mixtures reported even if only present atde minimis levels if the mixture is not also deemed to be a product in commerce and "production" thresholds are met. Therefore, we have reported on this de minimis-level impurity because it is believed to be incidentally formed (and then destroyed) in the processes in amounts aggregately exceeding the threshold 25,000 lbs. per year. | ||
2020 | Other Environmental Practices - The facility operates a sulfur recovery plant, SuperClaus process and catalytic incinerator process which together serve to convert de minimis levels of this compound to elemental sulfur product and to oxidize remaining trace amounts of the compound to sulfur dioxide at high efficiency. The facility also operates a flare gas treatment unit which may have the effect of reducing trace amounts of this compound reaching the flare, if present in the feed gases. This trace material is formed as an impurity during processing of hydrogen sulfide to produce sulfur. This would be true of any thermal sulfur recovery operation. It does not appear to exceed the de minimis 1% level in the mixtures formed, and having formed, it is also reacted in the processes to form product sulfur and sulfur dioxide. While the de minimis exemption exempts "mixtures" containing less than 1% of this material from consideration, conflicting guidance suggests that EPA wants impurities in some mixtures reported even if only present at de minimis levels if the mixture is not also deemed to be a product in commerce and "production" thresholds are met. Therefore, we have reported on this de minimis-level impurity because it is believed to be incidentally formed (and then destroyed) in the processes in amounts aggregately exceeding the threshold 25,000 lbs. per year. | ||
2019 | Other Environmental Practices - The facility operates a sulfur recovery plant, SuperClaus process and catalytic incinerator process which together serve to convert de minimis levels of this compound to elemental sulfur product and to oxidize remaining trace amounts of the compound to sulfur dioxide at high efficiency. The facility also operates a flare gas treatment unit which may have the effect of reducing trace amounts of this compound reaching the flare, if present in the feed gases. This trace material is formed as an impurity during processing of hydrogen sulfide to produce sulfur. This would be true of any thermal sulfur recovery operation. It does not appear to exceed the de minimis 1% level in the mixtures formed, and having formed, it is also reacted in the processes to form product sulfur and sulfur dioxide. While the de minimis exemption exempts "mixtures" containing less than 1% of this material from consideration, conflicting guidance suggests that EPA wants impurities in some mixtures reported even if only present at de minimis levels if the mixture is not also deemed to be a product in commerce and "production" thresholds are met. Therefore, we have reported on this de minimis-level impurity because it is believed to be incidentally formed (and then destroyed) in the processes in amounts aggregately exceeding the threshold 25,000 lbs. per year. | ||
2018 | Other Environmental Practices - The facility operates a sulfur recovery plant, SuperClaus process and catalytic incinerator process which together serve to convert de minimis levels of this compound to elemental sulfur product and to oxidize remaining trace amounts of the compound to sulfur dioxide at high efficiency. The facility also operates a flare gas treatment unit which may have the effect of reducing trace amounts of this compound reaching the flare, if present in the feed gases. This trace material is formed as an impurity during processing of hydrogen sulfide to produce sulfur. This would be true of any thermal sulfur recovery operation. It does not appear to exceed the de minimis 1% level in the mixtures formed, and having formed, it is also reacted in the processes to formproduct sulfur and sulfur dioxide. While the de minimis exemption exempts "mixtures" containing less than 1% of this material from consideration, conflicting guidance suggests that EPA wants impurities in some mixtures reported even if only present at de minimis levels if the mixture is not also deemed to be a product in commerce and "production" thresholds are met. Therefore, we have reported on this de minimis-level impurity because it is believed to be incidentally formed (and then destroyed) in the processes in amounts aggregately exceeding the threshold 25,000 lbs. per year. | ||
1998 |
Source Reduction:: W52: Modified equipment, layout, or piping
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Methods to Identify SR Opportunities: T03: Materials balance audits
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