Clean Water Act discharge permit · NPDES MTG310028
SONKAR INC - BAKER LEASE, Sunburst, MT: NPDES MTG310028 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
SONKAR INC - BAKER LEASE, held by SONKAR INC, holds NPDES permit MTG310028, which discharges to Holding Ponds. EPA’s file records it issued August 3, 2015 and expiring April 30, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SONKAR INC - BAKER LEASE |
|---|---|
| Permittee as filed | SONKAR INC |
| NPDES ID | MTG310028 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 3, 2015 |
| Expiration date | April 30, 2020 |
| Address | Sunburst, MT 59482 |
| Receiving water | HOLDING PONDS |
| Subwatershed | Kevin (HUC 100302030301) |
| SIC | 1311 – Crude Petroleum And Natural Gas |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 22Pollutants on file
- 5Under a numeric limit
- 22With a violation of any kind
- 2With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Oil & Grease | 0 | 14 | 2 | December 31, 2023 | 260% over the limit |
| Solids, total dissolved | 0 | 4 | 1 | June 30, 2005 | 79% over the limit |
| pH | 0 | 20 | 0 | ||
| Flow rate | 1 | 18 | 0 | ||
| Conductivity | 2 | 12 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 10 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 10 | 0 | ||
| Fluoride | 0 | 10 | 0 | ||
| Arsenic, total recoverable | 0 | 10 | 0 | ||
| Cobalt, total recoverable | 0 | 10 | 0 | ||
| Selenium, total recoverable | 0 | 10 | 0 | ||
| Zinc, total recoverable | 0 | 10 | 0 | ||
| Cadmium, total recoverable | 0 | 10 | 0 | ||
| Lead, total recoverable | 0 | 10 | 0 | ||
| Chromium, total recoverable | 0 | 10 | 0 | ||
| Copper, total recoverable | 0 | 10 | 0 | ||
| Sulfate | 0 | 10 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 9 | 0 | ||
| Sulfate, total [as SO4] | 2 | 5 | 0 | ||
| Flow rate | 0 | 3 | 0 | ||
| Oil and grease, hexane extr method | 1 | 1 | 0 | ||
| Specific conductance | 0 | 1 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 17, 2023 | Monitoring Violations - Analysis not Conducted | ST6 |
| October 17, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| October 17, 2023 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MTG310028 there.
Nearby on the register
- Discharge permits in Sunburst
- Every permit record in Sunburst, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.