MARKWEST HYDROCARBON LLC - SILOAM FRACTIONATION FACILITY
Quick Summary
- •Released 4,774 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Assessed $0 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
2 MARKWEST DR
SOUTH SHORE, KY 41175
View on map ↗ - County
- GREENUP County
- Industry
- Mining, Quarrying, and Oil and Gas Extraction
- NAICS (North American Industry Classification)
- 211130
- Inspections
- 6 · last Jul 15, 2025
- Total Penalties
- $0 · last Jan 8, 2019
- Registry ID
- 110000750875
How This Compares
Ranked by most recent year's total TRI releases.
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2022 | 1,329 | — |
| 2023 | 4,699 | +254% |
| 2024 | 4,774 | +2% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Cyclohexane | — | — | — | — | — | |
| n-Hexane | 4,770 | 4,770 | — | — | 23 | |
| Benzene | 4 | 4 | — | — | 23 | ♦ Carcinogen |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Cyclohexane | — | — | — | — | — | |
| n-Hexane | 4,695 | 4,695 | — | — | 16 | |
| Benzene | 4 | 4 | — | — | 16 | ♦ Carcinogen |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
Off-Site Transfer Destinations
Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.
| Destination | Chemical | Disposal | Recycling | Energy Rec. | Treatment |
|---|---|---|---|---|---|
|
SPIRIT SERVICES OF WV LLC
NITRO, WV
|
Benzene | — | 23 | — | — |
|
SPIRIT SERVICES OF WV LLC
NITRO, WV
|
n-Hexane | — | 23 | — | — |
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| cwa | Permit Violations - Violation Specified in Comment | Jul 20, 2022 | — | Open |
| cwa | Management Practice Violations - Failure to Maintain Records | Jul 20, 2022 | — | Open |
| rcra | Standards Applicable to Generators of HW: General | Mar 28, 1994 | Apr 4, 1994 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.02 | +163% | Jan 2020 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.02 | +5% | Jan 2020 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +82% | Jan 2020 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.01 | +355% | Jan 2020 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 68.30 mg/L | 60.00 | +14% | Feb 2016 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 68.30 mg/L | 30.00 | +128% | Feb 2016 | Resolved |
| Solids, total suspended | DMR, Limited - Numeric Violation | 258.00 mg/L | 60.00 | +330% | Dec 2015 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 44.20 mg/L | 30.00 | +47% | Dec 2015 | Resolved |
| Solids, total suspended | DMR, Limited - Numeric Violation | 220.00 mg/L | 30.00 | +633% | Jan 2015 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 220.00 mg/L | 60.00 | +267% | Jan 2015 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.