Clean Water Act discharge permit · NPDES MN0000256
SAINT PAUL PARK REFINING CO LLC, Saint Paul Park, MN: NPDES MN0000256 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
SAINT PAUL PARK REFINING CO LLC, held by MARATHON ASHLAND PETROLEUM LLC, holds NPDES permit MN0000256, which discharges to Miss R. EPA’s file records it issued November 14, 2007 and expiring October 31, 2012. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SAINT PAUL PARK REFINING CO LLC |
|---|---|
| Permittee as filed | MARATHON ASHLAND PETROLEUM LLC |
| NPDES ID | MN0000256 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 14, 2007 |
| Expiration date | October 31, 2012 |
| Address | Saint Paul Park, MN 55071 |
| Receiving water | MISS R |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Schmidt Lake-Mississippi River (HUC 070102060901) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 17Pollutants on file
- 17Under a numeric limit
- 10With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Mercury, total [as Hg] | 2 | 7 | 7 | January 31, 2025 | 197% over the limit |
| Sulfide, total [as S] | 2 | 4 | 4 | November 30, 2011 | 1,312% over the limit |
| Nitrogen, ammonia, tot unionized [as N] | 1 | 4 | 4 | September 30, 2010 | 137% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 3 | 3 | August 31, 2010 | 56% over the limit |
| Solids, total suspended | 3 | 1 | 1 | September 30, 2017 | 31% over the limit |
| Temperature, water deg. fahrenheit | 2 | 1 | 1 | June 30, 2014 | 1% over the limit |
| Nitrogen, ammonia total [as N] | 2 | 1 | 1 | June 30, 2003 | 66% over the limit |
| Oil and grease, hexane extr method | 3 | 132 | 0 | ||
| Chemical Oxygen Demand [COD] | 2 | 88 | 0 | ||
| pH | 2 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Phenolics, total recoverable | 2 | 0 | 0 | ||
| Phosphorus, total [as P] | 1 | 0 | 0 | ||
| Selenium, total [as Se] | 1 | 0 | 0 | ||
| Toxicity, salmo acute | 1 | 0 | 0 | ||
| Phenol | 1 | 0 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 27, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| March 27, 2025 | Monitoring Violations - Improper Analysis or Lab Error | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MN0000256.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MN0000256 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.